ML051530039
| ML051530039 | |
| Person / Time | |
|---|---|
| Site: | San Onofre  |
| Issue date: | 05/26/2005 |
| From: | James Park, Whittle C Southern California Edison Co |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| E4C-130, Rev 1 | |
| Download: ML051530039 (49) | |
Text
Attachment H (Calculation E4C-130, ICCN C-7)
Proposed Change (218 kV)
SONGS Units 2 and 3
Southern Canltroma Edison Company CALC NO. PAGE TOTAL NO. OF INTERIM CALCULATION E4C-130 ICCN NOJ PAGES CHANGE NOTICE (ICCN)I PRELIM. CCN NO. C-7 1 48 CALCULATION CHANGE NOTICE (CCN) BASE CALC. REV. UNIT CCN CONVERSION: CALC. REV.
COVER PAGE 1 3 CCN NO. CCN-
SUMMARY
CHANGE CALCULATION
SUBJECT:
0 NO ] YES TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear CALCULATION CROSS-INDEX ENGINEERING SYSTEM NUMBER/PRIMARY STATION SYSTEM Q-CLASS 0 New/Updated Index Included O Existing Index Is Complete DESIGNATOR 1804 PBA/ II CONTROLLED PROGRAM OR PROGRAWVDATABASE NAME(S) VERSION/RELEASE NO.(S)
Site Programs I Procedure Impact? DATABASE ACCORDING TO 0 ALSO, LISTED BELOW E NO 03 YES, AR No. S0123-XXIV-5.1 ECP050500255-3B O PROGRAM 0i DATABASE __I N I/A luq'drW4vJ.oI 14.'+o nevitrw.
- 1. BRIEF DESCRIPTION OF ICCN/CCN:
This ICCN provides the basis for lowering the DGVS relay setpoints to achieve an acceptable Switchyard voltage of 218 kV as described in AR 0500500255-38. The analysis is performed to determine the settings for the Undervoltage Relays for the 4kV ESF bus 3A04 (127D-1, 2, 3 and 4).
Although the analysis applies equally to the other buses, separate ICCN's have been written for each of the 4kV ESF bus of each unit.
This is an entire document ICCN. Changes to the previous revision have been marked by a revision bar in the right margin.
INITIATING DOCUMENT (ECP.- OTHER) ECP 050500255 - 38 Rev. 0
--- - -- - - - - - - -- - - - --- -1
- 2. OTHER AFFECTED DOCUMENTS (CHECK AS APPLICABLE FOR CCN ONLY);
p YES N NO OTHER AFFECTED DOCUMENTS EXIST AND ARE IDENTIFIED ON ATTACHED FORM 28-503.
- 3. APPROVED BY: 7& D IP Electrical / DE0 C. B. Whittle /5-26-0 4 l A ORIGINATOR (Prtnt name/sig o (Slgnatur te)ld Approval requires PQS T3EN64 ificatin VeI:c Approval requires RQy3EN64 Qualiicfation Verified:
Joshua Park / 5-26-0 IRE (Print name/sign/date)
Approval requires POS T3EN64 Qualification Verifed:
Inltia!'
REFERENCE:
S50123-XXIV-7.151 e4c-090-n-29_rover.doc
- 1 CALCULATION CROSS-INDEX Calculation No. E4C-1 30 Sheet 2 INPUTS OUTPUTS Does tih output Identify output Interface Interfaco calc/document Calc. rev. These Interfacing calculations and/or documents Results and conclusion of the subject calculation calc/dodument number and provide Input to. the subject calculation and If rovised ara used In these Interfacing calculations and/or requira Change? CCN, ECP, TCN/Rev., or rosponsiblo FLS mav require revisIon of the subloct calculation . documents. tracking t number.
Initials and date Rev.
Calc /Document No. No. Calc I Document No. Rev. No. YESI NO Rev.o1 Rev. 1 E40-090 CCN 116, ICCNs C-132, 3 E4C-090 3 Ybs ICCNs G-132, C-133, ICCN C-7 C-133, C-134, C-135 C-134, C-135 h/1S e M-0073-061 ICCN C-12 4 E4C-082 2 Ybs ICCNs C-49, 0-50, C-51 & C-52 E4C-098 3 Yes AR 050500255-28 4_- I L _______ 1. ___
DBD-SO23-TR-EQ DBD-SO23-120 5 Yps ECPs 050500255-DBD-SO23-140 36, 37, 38 & 39 S023-302-2-518 S02-11-11.IA-2 4 s ECPs 050500255-CPD-302-3-35 Sheet C 36,37,38 & 39 S023-302-2-353 S02-11-11.11B-2 4 Yes ECPs 050500255-1814-AR286-M0008 36,37,38 & 39 SO123-306-6-16 S03-ll-11.1A-2 4 Yies ECPs 050500255-1814-AU519-M0003 36,37,38 &39 90042 S03-11-11.113-2 5 Yes ECPs 050500255-JS-1 23-103C '36, 37, 38 & 39 30220-1 32220-1 UFSAR Soction 8.3.1.1.3.13 21 Ye ECPs 050500255-30230-1 . l*36,37,38&39 32230-1 31468 J-777-069 0 Yes AR 050500255-97 SCE 2r-424 REV. 5 4/05 (
REFERENCE:
S0123-XXIV-7.151 o4c-090_n-29LccI.doc I
IICCN NOJl E&TS DEPARTMENT l PRELIM. CCN NO. C-7 I Paae 3 of 48 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4G-130 I3ubject: TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Swltchgear Sheet 3 of 45 REV ORIGINATOR DATE IRE DATE lREV ORIGINATOR I DATE IRE DATE cc 0 C. B.WhIttle 5/162005 Joshua Park 5/16/2005 it 1 C.B.Whittle 52412005 Joshua Park 5/2412005 TABLE OF CONTENTS 1 PURPOSE ......... ........ . . ............ 5 1.1 Purpose.5 1.2 Degree of Accuracy.6 1.3 Margin of Safety.7 2 RESULgTS/CONCLUSIONS & REQUIREMENTS.....................................................................................6 2.1 Results/Conclusions.,8 2.2 Recquirements.10 3 ASSUMPTIONS _ ............ ....
....... ...... ................ ... ...12 3.1 Assumptions Which DO NOT Require Verification .12 32 Assumptions Requiring Verification .15 4 DES;IGN INPUTS ;_......... ........ ......... ...................... ..... 16... . 1 4.1 General .......... ............................. .. .........................................................
42 Relay Data for 27N Undervoltage Relay .16 4.3 Potential Transformer (PT) Data .................................... , 17 4.4 Environmental Condition Data .17 4.5 M&TE Used for Setpoint Measurement and Adjustment .18 4.6 125 Vdc Control Power .18 4.7 Technical Specifications Allowable Values .18 4.8 Analysis Limits at the 4kV Bus .18 4.9 PT Burdens ....... ,..........., 1.9 5 METHODOLOGY .............. .. .. ...... ........
5.1 Calculation of Primary Element Allowance (PEA) .20 5.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLIJ) .21 5.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT) .22 5.4 Calculation of Undervoltage Relay PU and DO Setpoints .23 5.5 Calculation of Undervoltage Relay PU and DO As Found/As Left Acceptance Bands ............................. 23 5.6 Calculation of Minimum and Maximum Relay DO and PU at the 4kV Level .24 6 REFERENCES ......... ... ....... ........ ................ 25 6.1 SONGS Calculations ...................... 25 6.2 Industry Publication and Standards ...................... 25 6.3 SONGS Documents and Procedures ....................... ; 25 6.4 Drawings ....................... 26 6.5 Vendor documents ...................... 26 6.6 Miscellaneous ...................... 26 7 NOMENCLATURE .................................... . ......-... ......................................................... ......... ...... 27 0 &Q AT uTTn A M TSt eIn 0 A. 11............
VIW-.LIIills ........... .. -... .--
SCE 26.426 Rev. 3 {
Reference:
S0123-XXIV-7.15J
E&TS DEPARTMENT IICCN NOJ I PRELIM. CCN NO. C-7 Paae 4 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
_,ihiemt:Ti-l rnCr fnr lndervnlt~am ReIlv Cliruiiits at Class 1 F 4 KV Switchaear Sheet 4 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE cc 0 C.B.Whittle 5/16/2005 Joshua Park 5116/2005 _
C. B. White 5/2412005 Joshua Park 5124/2005
'-Miuldtirnbf -i- .......................................................... .. 29 82 Calculation of Undervoltage Relay Total Loop Uncertainty (ITLU).......................................................... 31 8.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT) .35 8.4 Calculation of Undervoltage Relay PU and DO Setpoints . 35 8.5 Calculation of Undervoltage Relay PU and DO As Found/As Left Acceptance Bands .36 8.6 Calculation of Minimum and Maximum Relay DO and PU at the 4kV Level .36 9 ATTACHMENTS......................................38 9.1 Potential Transformer Data Tag .......................................................... 38 92 Westinghouse V-2 Transducer Data Sheet .......................................................... 39 9.3 Correspondence with ABB Engineering Concerning Type 27N Relay ..................................................... 40 9.4 Correspondence with GE Confirming Potential Transformer Model Number Change ............................. 42 9.5
- Degraded Voltage Relay Cable Voltage Drop Calculation ......................................... :.;.;.:.;.43 SCE 26426 Rev. 3 (
Reference:
S0123-XXIV-7.15)
l ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 I Paae 5 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class I E 4 KV Switchgear Sheet 5 of 48 REV ORIGIINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DAE c o C. B. Whitule 5/16/2005 Joshua Park 5/1005T2 C.B.White 5/24/2005 Joshua Park 5/24/2D l =
_ PURPOSE.- _
1.1 Purpose The purpose of this calculation Is to perform an analysis associated with the Undervoltage (UV)
Relays used for Degraded Voltage Protection in the 4kV Switchgears 2A04, 2A06, 3A04, and 3A06. The following analyses are performed for these relays:
A. Determine the Total Loop Uncertainty (TLU) and Allowable Value Tolerance (AVT),
B. Determine the Nominal UV Relay Pickup (PU) and Dropout (DO) Sotpoints, C. Determine the As-Found and As-Left acceptance for the PU and DO, D. Determine the NewTechnical Specifications Allowable Values, E. Verify that the PU and DO Setpoints protect the Analysis Limits at the 4kVlevel.
This calculation supercedes the portions of E4C-098 (Reference 6.1.2) that determine the settings for the 127D undervoltage relay PU and DO setpoints. The time delay calculations for these relays remain In E4C-098.
Revision 1 to this calculation was issued to incorporate comments provided by an independent third party review. The Undervoltage Relay setpolnts are the same as Revision 0. The methodology was revised to Include Potential Transformer (PT) uncertainties other than burden and to account for the voltage drop from the PT to the Undervoltage Relays. The resulting TLU is within 0.01% of calculated in the Revision 0 TLU and a positive margin has been maintained with respect to the Analysis Limits. The UV Relays will be evaluated for Inclusion In the Out-Of-Tolerance Notification program.
1.1.1 Background In the mid-1 990's, Southern California Edison installed a degraded voltage protection system to ensure San Onofre Nuclear Generating Station (SONGS) separates from offsite power If voltage degrades and remains below the voltage needed to support equipment operability (218 kV). This system could cause SONGS to separate from the preferred and alternate preferred power source(s) if the voltage from offsite sources Is between 218 kV and 222.2 kV. When In that voltage band, SONGS could transfer to the standby power source (emergency diesel generators) even though the offsite power remained capable of performing Its intended safety function. See SONGS Licensee Event Report No. 2005-003 (Reference 6.6.2) for specific details.
Engineering is continuing to evaluate ways to reduce the voltage required at the SONGS switchyard from 222.2 kV to a lower value. This calculation is intended to support this effort by determining optimal settings for the Undervoltage Relays, In support of change number PCN-561, to the SONGS Technical Specifications SCE 26426 Rev. 3 (
Reference:
SO123-XXIV-7.15)
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Pace 6 of 48 a § a. . a- a _w Va.a UALLULAIIUN SHtTI CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Swltchcqear Sheet 6 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.B.Whittle 5/16/2005 Joshua Park 5/1E/2005 C.B.WhitIlo 5/24/2005 Joshua Park 5t2412005 Approach._ ...- -.--2.
It has been determined that, due to the unique requirements of the settings involved with these relays, the calculation of TLU and setpoints of these Relays will be within the scope the Methodology of JS-123-1 03C (Reference 6.3.7).
This calculation seeks to minimize the possibility of unnecessarily dropping the 1E Buses from the grid on low voltage. In order to achieve this goal the following approach will be taken.
1.) The calculation of the TLU will be refined to eliminate unnecessary conservatism (compared to the previous calculation, reference 6.1.2), while adhering to SONGS standard JS-123-103C (Reference 6.3.7).
2.) The Dropout Setpoints will be calculated by applying the SONGS standard methodology for determining setpoints to the Lower (DO) Analysis Limits determined In electrical calculation E4C-090 (Reference 6.1.3). The Allowable Value Tolerance (AVT) will be applied to determine a NEW DO minimum allowable voltage which will require a change to SONGS Technical Specifications (Reference 6.3.2). The results will be consistent with the SONGS standard methodology and includes conservatism (margin).
3.) The Pickup Setpoints will be determined by applying a fixed deadband (the difference between the relay pickup and dropout) to the Dropout Setpoint. These results will be consistent with the standard methodology. The Allowable Value Tolerance (AV1) will be applied to determine a NEW PU maximum allowable voltage which will require a change to the SONGS Technical Specifications (Reference 6.3.2). The PU Setpoint will be shown to be conservative with respect to the UpperAnalysis (PU) determined in electricalcalculation E4C-090 (Reference 6.1.3) and the Margin will be defined with respect to this Analysis Limit.
1.2 Degree of Accuracy The results of the TLU portion of this calculation are based on statistical methods in accordance with SCE Engineering Standard for Instrument Setpolnt/Loop Accuracy Calculation Methodology, JS-123-1 03C (Reference 6.3.7). A 95% probability at 95% confidence level as endorsed by RG 1.105 (Reference 6.2.1) is used. Uncertainties are calculated to the nearest 0.001%.
Uncertainties and effects which are less than 0.001% will be deemed negligible for purposes of this calculation (see assumption 3.1.11).
The results of this calculation are valid under the assumptions specified in Section 3.0.
SCE26A426 Rev. 3 iReference; S0123-XXIV.7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 7 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Caic No. E4C-130 Sublect: TLU Calc for Undervoltaae Relay Circuits at Class I E 4 KV Switchaear Sheet 7 of 48 REV ORIGINATOR DATE IRE DATE REY ORIGINATOR DATE IRE DATE l 0 C.*B. Whie 5/1612005 Joshua Park 5/16/20051 If I C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 = __l z 1.3 Margin of Safety The margin of safety is established by two primary sources of conservatism included in this calculation. They are the Miscellaneous Allowance (see Section 3.1.10) and the calculated Margin (see Table 2.1.4). An additional area of conservatism Is the application of a +/-10 %
uncertainty to the calculated burden, used for the Ratio Correction Factor (RCF) uncertainty calculation, as described In assumption 3.1.12.
SCE26426Rev.33
Reference:
S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 8 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 R~iihinrnt- TLIJ
_b ,-....... _.___ for UndArvnitatin RspIav rCIrnufiqt~ Clanq IF 4 KV Switnhoear
_._ Csill
. ..._.M ........
Sheet 8 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR. DATE IRE DATE c O C.B.Whittle St16/2005 Joshua Park 5/16/2005 _ i Zs 1 C.B.WhittIle 524/2005 Joshua Park 5/24/200Si 2 RESULTS/CONCLUSIONS & REQUIREMENTS 2.1 Results/Conclusions 2.1.1 The TLU and AVT associated with the setpoints for Degraded Voltage Function (127D-1, 2, 3, & 4 relays - ABB 27N relay). The following voltages are at the Under Voltage (UV)
Relay' Table 2.1.1 127D Relays 1270 Relays TLU TLU Allowable
~Tolerance Value ________
Location 2A0421 127D-1, 2, 3, 4 2A0617 127D-1, 2, 3, 4 *0.48 Vac *0.16 Vac SWG 3A0420 127D-1, 2,3, 4 (+/-0.4 %) (+/-0.132%) ESF 'WR room I 3A0617 127D-1, 2, 3, 4 2.1.2 Pickup and Dropout Setpoints and Acceptance criteria to be used in Surveillance Test Procedures for the 127D Undervoltage (UV) Relays used for Degraded Voltage Detection. These voltages are at the UV Relay:
Table 2.1.2 As-Found Acceptance As-Left Acceptance 127D Relays Setpoint Band Band
(*0.16 Vac) (+/-0.1 0 Vac)
Dropout 118.13 Vac 117.97to 118.29 Vac 118.03 to 118.23 Vac I Pickup 118.43 Vac 118.27to 118.59 Vac 118.33to 118.53 Vac I 2.1.3 Calculated Allowable Values and Revised Current Technical Specification Allowable I Values Table 2.1.3 provides the calculated allowable values from section 8.5.1, the current and RevisedTechnical Specification Allowable Values at the 4 kV Bus Level. I SCE 26-426 Rev. 3 i Refereice: SO] 73-XXJV-7.151
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Pace 9 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calb for Undervoltaqe RelaV Circuits at Class I E 4 KV Switchqear Sheet 9 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE c O C.B. Whitle 5/16/2005 Joshua Park 5/16/2005 I; E 1 C. B. Whitle 5/2412005 Joshua Park 5/24/2005 .
I Table 2.1.3 127D Relays Technical 2A0421 127D-1, 2, 3,4 Calculated Specification Revised Technical 2A0617 127D-1, 2,3,4 Allowable Values Allowable Specification l 3A0420 127D-1, 2, 3, 4 (Section 8.5.1) ASection 4.7) 3A0617 12703-1, 2, 3, 4 ______ Scin47 Maximum AV PU 4144.6 s 4281 V c 4144.6 V Minimum AV DO 4123.0 > 4196 V Ž4123.0 V 2.1.4 DO Setpoint, TLU, Margin and Analysis Limits at the 4kV level.
Table 2.1.4 demonstrates that the calculated PU and DO setpoints protect both the Upper and LowerAnalysis Limits, with a positive margin at the 4kV Level.
_- Table 2.1.4 _ .
Relay Setpoint TLU Margin Analysis Limit Pickup 4139.1 +/-16.5 5.4 4161 Dropout 4128.5 : *16.5 6.0 4106 Note: All values are in Vac.
2.1.5 Maximum and Minimum PU and DO Voltages.
Table 2.1.5 Relay 4 kV Level UV Relay Level Maximum PU41591.1 (Nominal PU + TLU) 4155.9 118.91 I Maximum DO 4145.4 118.61 (Nominal DO + TLU) I Nominal PU 4139.1 118.43 I Nominal DO 4128.5 118.13 I Minimum PU 4122.3 117.95 (Nominal PU - TLU) I Minimum DO4111.8117.65 (Nominal DO-T~LU) 178176 I qJote: All values are in Vac. Numbers do not exactly match table 2.1.4 due to conservative rounding of results.
SCe 26426 Rev. 3 iReferenc. 501 23-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PREUM. CCN NO. C-7 Paae 10 of 48 CALCULATION SHEET CCNCONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 CaIc No. E4C-130 Riihbin-t- Ti II r.alc for t ndePrvnItan Rlnav Circnuits at lass I F 4 KV SwItehnear Sheet 10 of 48 I
REV l ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE k o C. B. Whittle 5/1612005 Joshua Park 5/16/2005 = =2 E 1 C. B. Whitte 5/24/2005 Joshua Park 5/24/2005 1
~-2.2gqiremens~ -
2.2.1 Revise Degraded Voltage System Surveillance Procedures (Reference 6.3.8, and any others affected; Maintenance to identify.) as follows:
a.) Revise the allowable as-found and as-left values of the Undervoltage Relays 2A0421 127D-1. 2, 3, 4; 2A0617 127D-1, 2, 3,4; 3A0420 127D-1, 2, 3, 4; and 3A0617 127D-1, 2, 3, 4 to the values contained in Table 2.1.2 above. (The existing setting tolerance of f 0.1 Vac remains the same).
b.) Revise the test equipment requirements to require the use of M&TE for calibration which meets or exceeds the following specifications:
- 1. Range Is sufficient to measure the DO and PU setpoints (-120 Vac 60Hz).
- 2. Accuracy is +/-0.057% or better with a 120 Vac 60Hz input.
- 3. Temperature Effect does not to exceed 0.01% over calibration temperature range (the calculation assumes a calibration temperature range of +/- 9F1per Assumption 3.1.3).
- 4. Resolution is 100 pVac or better.
An Agilent (HP) 3458A Multimeter may be used, under the following conditions:
- 1. An Auto-calibration (ACAL) must be performed before use and after a 4 hour4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> warm-up (meter power on) period.
- 2. All readings to be taken within +/-9 F0 of the ambient temperature at which the ACAL was performed.
- 3. Synchronous Sub-sample Mode.
- 4. Use the 100 or 1000 Vac Range.
c.) Revise survelilances to require thatthe calibration room temperature be recorded.
The implementation of this requirement will be tracked by ECPs 050500255- 36, 37, 38 &
39.
2.2.2 Increased Frequency of Relay Setpoint Checks In order to validate Assumptions 3.2.1 and 3.2.2 "As-Found" data for the relay Dropout and Pickup values must be taken after one month of operation at the new setpoints. All data taken will be forwarded to engineering for analysis. If any allowable values are exceeded during this interval, then Engineering will evaluate the assumption and calibration methodology. Otherwise, Engineering will detem-ine from the data collected, if the assumptions and calibration methodology are correct and determine a new calibration interval for these relays.
The Implementation of this requirement will be tracked by ECP 050301091-43,44,45& 46.
2.2.3 Revise Calculation E4C-098 SCE26-426 Rey. 3 IRefeience. SO] 23-XXlV-7.151
l ICCN NOJ _
E&TS DEPARTMENT I PRELIM. CCN NO. C-7 IPace 11 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
.h..: I'.
TI I1 SJIIclatJ nl r I Ita laxt t lfe err
,4*o M
a.
Ilaea fa I. F A kV SQRItchnlenr SRhent 11 nf I.
4R IoUUJmLe. I A G two %S54 flav
-o -* -t-Rv ORIGINATOR DATE IRE DATE REV ORIGINATR DATE O C. B. Wh!tte 5/16/2005 Joshua Park 5/16/2005 CD C. B.WhIte 5/24/2005 Joshua Park 5/24/20051
-Calculation-E4C.098-(Reference-6.1:2)isto-be-revisedto eliminate-duplication-ofthis-_ _
Calculation's settings for the 127D Undervoltage Relays.
The implementation of this requirement will be tracked by AR 050500255-28.
2.2.4 Update the DBD DBD-S023-120 (Reference 6.3.4) must be evaluated for changes due to this calculation.
The implementation of this requirement will be tracked by ECPs050500255-36, 37, 38 &
39.
2.2.5 Update the UFSAR UFSAR (Reference 6.3.3) must be evaluated for changes due to this calculation. It Is already known that section 8.3.1.1.3.13 Electric Circuit Protection Systems item B, Undervoltage Relaying, gives the undervoltage relay setpoint as 4228V at the 4kV bus.
This calculation will lower this value (see Table 2.1.4).
The implementation of this requirement will be tracked by ECPs 050500255- 36, 37, 38 &
39.
2.2.6 Evaluate the UV Relays for Inclusion In the Out-Of-Tolerance Notification Program I
The Relays will be evaluated for Inclusion In the SONGS Out-Of-Tolerance Program (OTN) Calculation J-ZZZ-069 (Reference 6.1.5).
The implementation of this requirement will be tracked by AR assignment 050500255-97.
SCE 26426 Rev. 3 f
Reference:
S0O23-XXIV-7.153
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 12 of 48 CALCULATIUN SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Cale No. E4C-130
Subject:
TLU Caic for Undervoltage-Relay Circuits at Class I E 4 KV Switchgear Sheet 12 of 48 REV ORlIINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C C. B. Whittle l 511005 Joshua Park 5116/2005_
1 C. B. WhRtite 5124/2005 Joshua Park 5124/2005 . z
_ ASSUMPTIONS~ ___
3.1 Assumptions Which DO NOT Require Verification 3.1.1 Assumed Setpoint (SP) Value for Percentage of Reading Values The setting tolerance for the relay is *0.1 Vac (Reference 3.1.2). In order to perform the calculation in percent of setpoint, without knowing the exact setpoint (this is to be determined by the calc), an estimate of the setpoint values for the trip and reset is required. Therefore for conversion of Vac readings only, the undervoltage relay Pickup (PU) and Dropout (DO) are assumed to be set within +/-0.75 volt of 118 Vac. Therefore, 118 Vac will be used for computational purposes for uncertainties which are in percent of reading (or percent of setting). This assumption will result In extremely small errors; for the 0.1 Vac case, -Error = ((0.1/(118+0.75)-(0.1/11B))*100% and +Error = ((0.11(118-0.75)-(0.1/118))*100%, which is *0.00054% This is less than the 0.001% limit assumed to be negligible (see Assumption 3.1.11).
3.1.2 Relay Setting Tolerance The setting tolerance, used for adjustment of the undervoltage relay setpoint during calibration, Is assumed to be +/-0.1 Vac. This value Is currently being used in the SONGS test procedures (Reference 6.3.8).
3.1.3 Calibration Temperature Since the Class 1 E SWGR rooms are environmentally controlled with normal &
emergency chiller, calibration temperature is assumed to be between 55 and 82 2 F (Section 4.4 normal environmental conditions, not calibrated during a LOCA). This temperature band includes the range of temperatures from Summer to Winter conditions.
Since the calibration Is assumed to be a relatively short duration event (3 to 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br />) the temperature Is assumed not to vary by more than - 9 F2 during the calibration, because the room Is environmentally controlled.
3.1.4 Humidity Effect Since the Humidity effect Is not specified by the manufacturer, It is assumed to be included Inthe temperature effect, per JS-123-103C section 6.4.1.2 (Reference 6.3.7).
3.1.5 Pressure Effect Since the undervoltage loops consist entirely of electrical electronic components, the error induced by normal environmental pressure changes is negligible and Is therefore not considered in this calculation. There are no additional accident pressure considerations associated with this environment (see Section 4.4).
SCE 26-426 Rev. 3 1Reference S0123-XXIV-7.15]
ICCN NO./
E&TS DEPARTMENT PRELIM. CCN NO.
ICON C-7 .O ae 113 f4 1Pae UALCULATIUN SHEET CCN CONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 Catc No. E4G-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Swltchgear Sheet 13 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.B.Whittle 5/1 6/20os Joshua Park 5/16/2005 1ir C. B. Whitle 5/24/200S Joshua Park 5/24/2005 The ESF SWGR room Is a low radiation area during both accident and normal conditions (mild environment; see Section 4.4). Therefore the error induced by normal radiation effects to the Undervoltage Relays and Potential Transformers is assumed to be negligible.
3.1.7 Seismic Effect (Se)
The Undervoltage Relays are seismically qualified devices (see Reference 6.5.1 for the seismic specification). Therefore the Seismic Effect for the Undervoltage Relays is considered negligible.
3.1.8 Test Equipment Test equipment with an accuracy equal to or better than an Agilent (HP) 3458A Multimeter Is to be used for calibration of the undervoitage relays (refer to 4.5 for detailed specifications). This will be implemented by Requirement 2.2.1.b.
3.1.9 Potential Transformer Accuracy The potential transformers are designed and manufactured per ANSI/IEEE Standard C57.13-1993 Requirements for Instrument Transformers (Reference 6.2.2). This standard specifically clarifies that if the PT is used in relaying, only the RCF needs to be determined, and this may be achieved either experimentally or by computation. For these PT's, this has been accomplished by the manufacturer (see attachment 9.1) and need not be repeated in the field.
This calculation will apply the RCF equation of section 8.1.12 of IEEE standard C57.13-1993 (Reference 6.2.2) with a calculated burden rather than use the maximum accuracy of +/-0.3% with an unknown burden. In addition to the uncertainty applied to the burden (see Assumption 3.1.12), an additional Independent, random error of 0.05% will be included (via SRSS) for the uncertainties associated with the voltage variations caused by environmental, manufacturing variations and other effects associated with the PT.
The requirement for the PT, for voltage applications, is an accurate Turns Ratio. Periodic calibration of the PT to verify the turn ratio change is not required because there Is no Identifiable mechanism other than failure of the PT to cause the turn ratio to change.
3.1.10 Miscellaneous Allowance Per JS-1 23-103C (Reference 6.3.7), the standard miscellaneous allowance of +/-0.5% of span is generally assumed. The standard does however allow the value to be changed Oat the Engineer's discretion". Based on the accuracy of the devices involved (primarily the undervoltage relay repeatability) an allowance of +/-0.5% would be excessive.
Therefore, for purposes of this calculation, a miscellaneous allowance of *0.1% of reading (equal to the undervoltage relay repeatability) will be used.
SCE 26.426 Rev. 3 {
Reference:
S0123-XXIV-7.151
ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 Paae 14 of 48 CALCULATION SHEET I n:rNVFrRIr-Vn .
CIN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Tl 11 rI. for I Inrin itnbfiti PIrrirliTe At Pnaee 1 VOnS A kV QxAriftkhnanr Sheet 1A of AR REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B.Whittle 5/16/2005 Joshua Park 5/6120051 1 C. B. While 5/2 4/20 05 Joshua Park 5/24/2005 __
- ~1 -I- -- 1----
3.1.11 Negligible Effects and Values Uncertainties and effects which are determined to be less than 0.001% (one thousandth of one percent) will be considered negligible and eliminated from consideration.
3.1.12 Accuracy of the PT Calculated Burden The difference from the average burden for each of the Individual PT burdens is less than
- 2% (see Section 8.1.1). In order to ensure that this calculation remains bounding and conservative, the mean calculated burden will be used with an uncertainty of
- 10 % to account for the differences in the Individual burdens, manufacturing variations and any other unknown effects.
3.1.13 Environmental Conditions of the 2(3)A04 and 2(3)A06 Cubicles 2(3)A04 and 2(3)A06 Cubicles are located Inthe Class 1E SWGR rooms, which are environmentally controlled with normal & emergency chiller. The relays are mounted inside of the cubicles and will be at a higher temperature than ambient room temperature, but it is reasonable to assume that the temperature elevation Is relatively constant and therefore the difference between the highest and lowest temperatures experienced by the relays will be the same as the difference between the highest and lowest room temperatures.
3.1.14 Synchroscope Switch Position The Synchroscope is assumed to be used (switched onto the PT as a burden) only when the associated bus (2A04, 2A06, 3A04 and 3A06) Is being transferred (synchronized).
During a degraded voltage event (when the UV relays drop out), the dead bus Is automatically transferred to the diesel generator with no synchronization required. E0I Diesel Generator Failure follow-up actions, which manually connect the EDG to a dead bus If the auto circuitry does not function completely, would also activate the Synchroscope. After the grid is stable, synchronization is required to reconnect the 1E 4kV buses to offsite power, however at this point the grid has been stabilized and the Synchroscope will only be needed for a short duration (on the order of 5 minutes). The Synchroscope Is not switched into the circuit when the 4kV bus voltage Is near the Undervoltage Relay setpoint, therefore the Synchroscope load is excluded from the PT burden calculations.
3.1.15 Voltage Drop from PT to Undervoltage Relay This calculation will assume a worst case drop in voltage from the PT to the Undervoltage Relay of 0.02 Vac. This assumption Is based on the estimated maximum voltage drop determined in Attachment 9.5. The minimum will be conservatively assumed to be zero (0) Vac at the relay. This uncertainty will be applied as a bias since the voltage drop would be normally constant for a constant load.
SCE 26-426 Rev. 3 {
Reference:
S0123-XXIV-7.15]
I ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 I Paae 15 of 48 CALCULATION SHEET [ CCN CONVERSION:
I CN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 TI 11 e%.I.fnr II nmrRfeII,n i Plrriilfof at lnee IT: A K'V .Awt.ehrtanr Shent 159 nf AR REV ORIGINATOR DATE IRE DAT REV ORIGINATOR DATE IRE DATE l C. B.Whitte 5/1612005 Joshua Park 5/1182005 C.B. Whittle /2412005 Joshua Park 5/24/2005-.
-- I. _
J. I. EU IIILUIVQI _____________________ I A confidence of 2-a Is conservatively assumed for all uncertainties used as an Input to this calculation unless the confidence Interval Is provided.
3.1.17 Margin A margin of 6 Volts, relative to the 4kV bus Is used in the determination of the Dropout setpoint. This Margin Is based on engineeringJudgment and was chosen based the value being larger than the Allowable Value Tolerance (see Section 8.3). The Margin for the Pickup Setpoint will be calculated.
3.2 Assumptions Requiring Verification 3.2.1 UV Relay Deadband Adjustment The manufacturer specified deadband adjustment (difference between the dropout and pickup) for the 127D relays may be set down to 0.5% (see Section 4.2). This calculation assumes that the deadband setting may be adjusted down to 0.3 Vac. This Is being done with vendor concurrence (see Attachment 9.3). This assumption will be verified by testing per Requirement 2.2.2.
3.2.2 UV Relay Drift (D)
Drift allowance for the 127D-1, 2, 3, &4 (27N) relays Is assumed to be equal to the rated accuracy (repeatability) of +/- 0.1 % (See Section 4.2), since the vendor drift value is not available. This assumption will be verified by testing, per Requirement 2.2.2.
SCE 26426 Rev. 3 (Reference S0123-XXIV-7.15]
ICCN NO* O E&TS DEPARTMENT PRELM. CCNNO. C7 Pace 16 of 48 1 .
CALCULATION SHEET CCN CONVERSION:
L CCN NO. CCN Project or ECP: SONGS 2 & 3 Calo No. E4C-130 Q.Ha*T1 11 ('nitrfemr I Inrlo~nmilrno 91otli M~rrtdiuc at Mwm 11: A J(V. AwIfnhnonr Sheet 16 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. Whittle 5/16/2005 Joshua Park 5/161/2005 l 2 !
1 C. B. Whitte 5124/2005 Joshua Park 5/24/2005
-- I-4--DESIGN-INUTS----------~ ----- - -- *--**-
4.1 General The SONGS Unit 2/3 Safety-Related 4kV System consists of four 4kV Buses. Buses 2A04 and 2A06 are the Unit 2 Train A and Train B Buses, respectively, while 3A04 and 3A06 are the corresponding buses for Unit 3.
Bus 2A04 contains 21 separate cubicles numbered from 2A0401 to 2A0421. Bus 2A06 contains 20 separate cubicles numbered from 2A0601 to 2A0620. Bus 3A04 contains 20 separate cubicles numbered from 3A0401 to 3A0420. Bus 3A06 contains 19 separate cubicles numbered from 3A0601 to 3A0619. The cubicles containing the undervoltage relays are given In the table below.
Location Funcdion Bus 2A04 Bus 2A05 Bus SA04 Bus 3A06 Cubicle 21 17 20 17 Undorvoltage Relay ID 2A0421 2A0517 3A0420 3A0617 Numbrs 127D-1. 2. 3. 4 127D-1. 2, 3,4 1272-1,2. 3. 4 127D-1, 2, 3, 4 4.2 Relay Data for 27N Undervoltage Relay (Reference 6.5.1 except as noted)
Device No: 127D-1, 2, 3,4 (Reference 6.3.1)
Manufacturer: ABB (Reference 6.3.1)
Type: 27N (Reference 6.3.1)
Catalog #: 411T5375-HF (Reference 6.3.1)
Pickup range: 70-120 V Dropout delay: 2-20 seconds Reset time: Less than 2 cycles Control voltage: 100-140 V DC Temperature range: -30 to +70° C Burden: 0.5 VA at 120 V Repeatability (with Harmonic filter):
- a. ©constant temperature & control voltage - +/-0.1 %
- b. For allowable dc control power range (100-140 V) - +/-0.1%
- c. Temp. Range: 0 to +55O C - +/-0.75%
+10 to 4400 C - +/-0.4%
-20 to +70w C - +/-1.5%
- d. Time delay - :10% or +/-20 milliseconds whichever is greater.
Notes:
- 1. Deadband: Difference between pickup and dropout can be set as low as +/-0.5 %
2.The first three repeatability tolerances should be considered independent and may be cumulative.
SCE 26426 Rey. 3 l
Reference:
S0I23-XXIV-7.I5]
ICCN R NOJ N E&TS DEPARTMENT I PRELM. CCN NO. C-7 I Paae 17 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 tuuJ-.&.
TIaI Tihll
- vc--
fnr Iv-In ginIterue
--- Relnaio .v lrcIuelts -a$ItClas 1* F A
- . KV
-v AwIttchnar
- .- Sheet 17 of 48
- . - *-- - -- I REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE c O C.B. Whittle 5/16J2005 Joshua Park 5/16/2005 _ ;,I 1 C. B. Whittle 5124/2005 Joshua Park 5/2412005 4.3 Potential Transformer (PT) Data For the following data, refer to Reference 6.5.3 and Attachments 9.1 and 9.4:
PT ratio: 35:1 MFR: General Electric Model: JVM-3 Thermal Rating:750VA Style: Old No.: 643X094000 New No.: 763X021026 (See Attachment 9.4 for confirmation)
Accuracy: 0.3 W, X, M, Y, 12 Z burden @ 60Hz PTTag Data (Attachment 9.1):
RCF Burden Angle Power Factor VA Minutes No Load 0.9974 0 i 1.00 1.0019 75 -2 0.85 4.4 Environmental Condition Data FORM 4: ENVIRONMENTAL CONDITIONS DATA SHEET AREA: CB Area B5 (ESF SWGR room) Mild Environment (Reference 6.3.5.)
Parameter Data Reference Normal Temperature 550 F 6.1.1 Minimum, F Nommal Temperature 81 .7°F 6.1.1 Maxdmum, F Normal Radiation < 1.0 E4 Rads 6.3.5 Value, gamma Rads Normal Pressure 0 psig 6.3.5 Minimum. psig Normal Pressure 0 psig 6.3.5 Maxrmum, psig AccidentTemperature 95°F 6.3.5 Maxdmum. 'F Accident Radiation < 1.0 E4 Rads 6.3.5 Value, Rads gamma Accident Relative 80 6.3.5 Humidity Range % RH Accident Pressure 0 psig 6.3.5 Maximum, psig SCE26-426 Rev. 3 Refrcc SO]23-XX]V-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CON NO. C-7 Pace 18 of 48 CALCULATION SHEET CON CONVERSION:
CON NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subiect: TLU Calc for Undervoltaae Relay Circuits at Class I E 4 KV Switchaear Sheet 18 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR I DATE IRE l DATE 0 C. B. Whitte 5/1612005 Joshua Park 5116/2005 I B 1 C. B. Whitle 5/24/2005 Joshua Park 5/24/2005 = =
".IJ IX IViL X 1C uzuu lug Ii LjQ£J(5IL
-- gne,,-nqA cto us U III iIt
~t----------~...~
odlIlu rAUJU06filE t-I _
- I .
(Reference 6.5.8)
Model: Agilent 3458A Multimeter (Agilent was formerly Hewlett Packard)
Range: 100 Vac range (120 Vac Full Scale)
Mode: Synchronous Accuracy: +/-0.02% of Reading + 0.002 % Range (40Hz to 1kHz)
Temperature Coefficient for reading outside of +/- 1 CO, but within +/- 5 C' of the last ACAL (See note):
+/-(0.001% of Reading + 0.0001 % Range)/C, Resolution: 10 pVac Full scale: 120 Vac Range: 1000 Vac range (700 Vac Full Scale)
Mode: Synchronous Accuracy: +/-0.04% of Reading + 0.002 % Range (40Hz to 1kHz)
Temperature Coefficient for reading outside of +/-1 C0, but within +/- 5 C" of the last ACAL (See note):
+/-(0.001% of Reading + 0.0001 % Range)/Co Resolution: 100 pVac Full scale: 700 Vac Note: These specifications rely on an the meter being In a thermally stable environment with the power on for 4 hours4.62963e-5 days <br />0.00111 hours <br />6.613757e-6 weeks <br />1.522e-6 months <br /> prior to the auto-calibration (ACAL).
4.6 125 Vdc Control Power The 125 Vdc control power to the Undervoltage Relays Is maintained within the range of 103 Vdc to 140 Vdc per Reference 6.3.6 page 16.
4.7 Technical Specifications Allowable Values Section 3.3.7 of the current Technical Specification (Reference 6.3.2) gives the following Allowable Values for the Degraded Voltage function:
Dropout 2 4196 V Pickup s 4281 V 4.8 Analysis Limits at the 4kV Bus I The LowerAnalysis Limit for the Undervoltage Relay DO is determined in CCN 11 7 to E4C-090 (Reference 6.1.3.1). This voltage level ensures that the loads on the ESF Buses have adequate voltage to pedform their safety functions.:
ALDO Lower = 4106 Vac at the 4kV Bus I
SCE26-426 Rev. 3 (Reference-S0]23-XX1V-7.I5]
ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 I Paae 19 of 48 CALCULATION SHEET CCN CONVERSION:
C .CCNNO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 O.kII II i r1lo-fd,%r I In r~r-Jtrefna S.MaimIP
- Irdi111to tt r~iml eIF A. IV 4,ltrffhnapr SheAt 19 nf AR IOUUJ%;L. 1 -- -" S1 S* *L - _
REV ORIGINATOR DATE IREDAT REV ORIGINATOR DATE IRE DATE C 0 C. B. Whittle 5/16/2005 Joshua Park 511612005 = =
1 C. B. Whittle 5124/2005 Joshua Park 54/2005 ___ __
The UpperAnalysis limit for the PU is 4161 maximum voltage per Helerence 6;1.32 This voltage . _ _,_
ensures that the ESF Buses remain on the preferred or alternate preferredpowersource(s) If they are available. Therefore:
ALpuLpper (Pickup) =4161 Vac at the 4 kVbus.
4.9 PT Burdens 4.9.1 Individual Component Burdens Load Type Vendors Stated Load Burden Reference Undervoltage relays . 0.5 VA (Solid State) 0.5 + JO VA 6.5.1 6.5.4 127Ft, 2,3,4 (CV-2) 2.4 VA 0 .29 pf 0.70 + j2.30 VA (Tap set at 105 Vac per 6.3.1) 127R1, 2,3.4 (SVF) 17VA 0 27° Lagging 15.15 + 1.72 VA 6.5.6 Hathaway Digital Fault 50 k Ohms 0.288 +JO VA 6.5.7 Page 1-21 Recorder (DFR)__ _ _ _ _ _ _ _ _ _ _ _ _
TDV and TDV1 0.2 VA 0.2 +-JO VA 9.2 Not In circuit Synchroscope Circuit N/A OVA per assumption 3.1.14 4.9.2 Burdens On Each Transformer (2A04, 2A06, 3A04, 3A06):
Transformer Attached Devices Reference (Burdens) 12713-3 Undervoltage Circuit 1 127F3 6.4.1 PT a-b 127R3 TDV Undervoltage Circuit 1 127D-4 6.4.1 PT ~127F4641 b-c P~~b-c ~~127R 4_ _ _ _ _ _ _ _ _ _ _ _ _ _
127D-1 Undervoltage Circuit 2. 127F1 PT a-b 127R1 6.4.1 DFR Undervoltage Circuit 2 127F2 6.4.1 PT b-c 127R2 (Synchroscope Is Not in circuit per PT b-c127R2assumption (Synchroscope) 3.1.14)
Note: Circuit 1 refers to the upper circuit on the elementary and circuit 2 is the lower.
They are labeled as such on the elementary. I SCE 26-426 Rev. 3 lReferer~ce S0123-XXIV7.7J5]
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-7 I Paae 20 of 48 0% A I1f It A U I OX ___
U;ALUIULA I IUN bItzII l CCN CONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 Cal No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switch-gear Sheet 20 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE a C. B.Whittle 511/2=005 Joshua Park 5/16/2005 = a :=
C. B. White 3/2412005 Joshua Park 512412005 S METHODOLOGY _-_ -- _ __ 7- __ .- __
Overview: This methodology is consistent with the requirements of SONGS JS-123-103C (Reference 6.3.7) for safety system setpoints. This loop consists of only the primary element (the PT) and the Undervoltage Relay. The only error attributed to the primary element is the Primary Element Allowance (PEA).
Due to the unique requirements placed on the setting of the Undervoltage Relays, a different methodology is employed to determine the Dropout from that of the Pickup setpoint.
The Dropout setpoint is determined based on SONGS JS123-103C StandardMethodology with respect to its Lower Analysis Limit. The Margin Is calculatedbetween the DO UpperAnalysis and the DO setpoint plus the TLU andthe Analysis Limit. In orderto prove the value is conservative.
The calculation of the Pickup setpolnt Is based strictly on applying the minimum acceptable Deadband to the Dropout setpoint in order to minimize the voltage required to ensure reset of the relays (as discussed above). The Margin is calculatedbetween the setpoint plus the TLU and the Analysis Limit, in orderto prove the value Is conservative.
The minimum and maximum trip (setpolnt *TLU) Is calculated for both the Pickup and Dropout.
These values are provided for Information only.
5.1 Calculation of Primary Element Allowance (PEA) 5.1.1 Calculation of the PT Burden The Transformer burden will be calculated by summing each of the burdens connected to the PT.
5.1.2 Calculation of the PT Accuracy The only source of error considered for the voltage transformer Is the Ratio Correction Factor (RCF), since the ratio of the secondary voltage Is the only parameter sensed by the undervoltage relays. Equation 5-1 from IEEE standard C57.13-1993 section 8.1.12 (Reference 6.2.2) provides the RCF for the transformer for a given burden, with measured values of the true ratio and phase angle at zero burden, and one other burden.
Manufacturer tag data, along with the calculated burden for the transformer will be used to find the applicable RCF.
To aCE126-qic6 Kv. 3 1Rezerence: S01i3-AXiV-i7.1
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 l Pace 21 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Caic No. E4C-130 O.,i,.l JUUJW;VL.
TI II Pol^ #fn.
9 W tW I InolcrunitInnf U.LV IWO W-l*e-Jv-c.
Onhtr l.S**
MIr,-tite st 'lInce fl~ac 1:
- air A IVI lair QwIte-hmer r Sheet 21_
nf AR A
I REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE CB.WhItie O 5116200S Joshua Park 5/612005 -
1 C. B. Whittle 5/24/2005 Joshua Park 5/2412005 __
-I -- - - _ _ _ __ _ - . . _ __ _ __ _ __ _ __ _ _ _ __ __ _ _
Equation 5-1 RCF, - RCFRo + [B, [(RCF,- RCF,)xcos(6, - 0C) + (rT- ro )xsin(6, - 0r)]
Where, Bo= the zero burden for which RCF and y are known, B= a burden for which RCF and yare known, B= the burden for which RCF Is to be calculated, Of and E0 = power factorangles of burdens Bt and Bc, respectively (in radians)
RCFO, RCFt and RCFC = transformer ratio correction factors for burdens Bo, B., and Bc, respectively, yt, yo = the transformer phase angles, In radians, at burdens B, and Bo respectively.
Each transformer burden will be calculated based on connected loads. These burdens will be averaged and then a margin (per Assumption 3.1.12) applied to the average to find the maximum and minimum burden. Based on this a bounding burden will be determined and used for calculating the uncertainty of the ROF due to variation in the burden.
The accuracy of the potential transformer will then be given by determining a bounding (conservative) value for the uncertainty of the RCF, based on the uncertainty Inthe calculated versus the actual Burden. This uncertainty will be part of the PEA term.
Because it cannot be shown to be a random process, this portion of the PEA will be applied as a BIAS in the final TLU calculation and will be designated by the symbol PEABwrd-An additional independent and random uncertainty will be applied per assumption 3.1.9.
This uncertainty will be applied via SRSS In the TLU computation. It will be designated by the symbol PEA-T.
5.1.3 Voltage Drop from the PT to the UV Relay (PEAvD).
Per assumption 3.1.15 a bias will be applied to account for the uncertainty of the Voltage Drop from the PT to the UV Relay, due to the cable resistance. This bias will be designated by the symbol PEAvo.
5.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLU)
SCF26-426 Rev. 3 J
Reference:
S0123-XXIV-7.15]
ICCN NON E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 22 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 cz,hie.,. TI Ii- I uuIrnifnr- I InrlliimnItnrip RpInv Criruntifi
- v. -~
- nt Clagn IF -
4.------
KV Switrnhaar Y--. *- --- _
Sheet 22 of 48 REV ORIGINATOR DATE IRE DATE l REV ORIGINATOR DATE IRE DATE _
0 C. B. Whltde 516/2005 Joshua Park 5/16/2005l =
C.B. Whittle 0 52412005 Joshua Park =52412005
-1 52.1 The following uncertainties are considered for inclusion per JS-123-1030 (Reference 6.3.7):
- a. PEA as outlined above.
- b. Device Tolerances (Undervoltage Relay only)
- Drift allowance (D)
- Power supply allowance (PSe)
- Temperature allowance (Te - normal & accident)
- Seismic allowance (Se)
- Radiation allowance (Re)
- M&TE accuracy (MTEA)
- Readability (R)
Readability is +/- least significant digit for digital M&TE
- M&TE temperature effect (MTETE)
- M&TE reference standard (MTERs)
MTER Is 2+5% of M&TE accuracy per JS-123-103C (Reference 6.3.7).
These uncertainties will be combined utilizing the Square Root of the Sum of the Squares Method.
- d. Setting Tolerance (ST) Note: Used In lieu of Accuracy InTLU perJS-123-103C (Reference 6.3.7) Section 6.2.
- e. Miscellaneous Allowance (Ma) 5.2.2 Combination of TLU Uncertainties The Square Root of the Sum of the Squares Method as defined in JS123-103C (Reference 6.3.7) is utilized to combine the Independent random uncertainties Inthe determination of the TLU and the biases (PEA In this case) are added. Therefore:
TLU=+/- ]Te +D 2 +PSe2 +Se2 +Re2 +MTE2 +ST2 +Ma 2 +PEAT2 +/-PEABU) +/-pEAV 5.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT)
The allowable value (AV) will be calculated per JS-1 23-1 03C (Reference 6.3.7) section 4.4 from the equation:
SCE 26-426 Rev. 3 (Referen= SO] 23-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paoe 23 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 II
Subject:
TLU Calc for Undervoltage Relay Circults at Class I E 4 KV Switchgear Sheet 23 0f 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.B.Whittle 5/2005 Joshua Park 5116/2005 _ in2 I C. B. White 5/2412005 Joshua Park 512412005 _
AVT = ++/-D2 +ST 2 +R2 Where D is the drift of the undervoltage relay, ST Is the setting tolerance of the undervoltage relay and R is the readability of the test equipment.
5.4 Calculation of Undervoltage Relay PU and DO Setpoints 5.4.1 Undervoltage Relay Dropout Selpoint The undervoltage relay dropout setpoint Is a decreasing setpoint as defined in JS-123-103C (Reference 6.3.7) section 4.7 and Is determined by:
SP (Decreasing) = ALL + (+TLU) + M Where ALuis the upperAnalysis Limit (see Section 4.8), M is the margin and (+TLU) is the positive TLU.
5.4.2 Undervoltage Relay Pickup Setpolnt 5.4.2.1 Calculation of Relay Pickup Setpoint SPpu The Pickup Setpoints will be determined by applying a set deadband (DB = the difference between the relay pickup and dropout) to the Dropout Setpoint (SPDO).
Therefore:
SPpu = SPO + DBS 5.4.2.2 Determination of Margin of PU Selpoint to the PU UpperAnalysis Limit (Mpu)
The undervoltage relay PU setpolnt is a Increasing selpoint as defined in JS-123-103C (Reference 6.3.7) section 4.7. Therefore the following equation applies:
SP (Increasing) = ALu + (-TLU) - M Where ALuis the upper Analysis Limit (see Section 4.8), M Is the margin and (-TLU) is the negative TLU.
Since the SPpu, -TLU and AL are known, the margin can be determined by reanranging this equation andsolving forthe margin. The Margin Is:
Mpu = ALpu - (SPpu - (-TLU) )
NOTE: A positive or zero margin will meet the requirements and a negative margin does not.
5.5 Calculation of Undervoltage Relay PU and DO As-Found/As-Left Acceptance Bands SCE 26426 Rev. 3 {
Reference:
S0123-XXIV-7.15]
ICCN NO N E&TS DEPARTMENT PRELIM.CCN NO. C-7 Pace 24 of48 CALCULATIUN SHEEI CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Cale for Undervoltage Relay Circuits at Class 1E 4 KV Swltchgear Sheet 24 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.B.Whittle 516/2005 Joshua Park 5116/2005i C. B.Whittle 5/24/2005 Joshua Park 5/24/2005 5.5.1 Calculation of Undervoltage Relay As-Found Acceptance Band The As-Found Acceptance band will be the trip or reset setpoint *AV (allowable value).
5.5.2 Calculation of Undervoltage Relay As-Left Acceptance Band The As-Left Acceptance band will be the trip or reset setpoint +/-ST (setting tolerance).
5.6 Calculation of Minimum and Maximum Relay DO and PU at the 4kV Level The Minimum and Maximum Relay DO and PU Values are calculated by applying the TW to the setpoint (SP). This yields the following equations:
Maximum = SP + (+TLU)
Minimum SP + (-TLU)
SCE26-426 Rev. 3 IReferenice: SO] 23-XXIV.7.15)
ICON NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 l Paoe 25 of 48 CALCULATION SHEET I CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchaear Sheet 25 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE G O C. B.Whittle 5/16t2005 Joshua Park 511612005 _ i C. B. WhIttle 5/24/2005 Joshua Park 5/24/2005 6 REFERENCES 6.1 SONGS Calculations 6.1.1 M-0073-061 ICCN C Normal Environmental Conditions for the 4kV Switchgear Protective Relay Setting Calculation.
6.1.2 E4C-098 Rev. 3 - 4kV Switchgear Protective Relay Setting Calculation 6.1.3 E4C-090 Revision 3 - Auxiliary System Voltage Regulation 6.1.3.1 CCN 117- Sensitivity Study to determine Class lEEquipment Protection 6.1.3.2 ICCNs C-132- forbus 2A04, C-133 for2A06, C-134 for 3A04 and C-135 for 3A06.
6.1.4 E4C-082 Revision 2 - System Dynamic Voltages During DBA 6.1.4.1 ICONsC-49forbus2A04, C-SOfor 2A06, C-51 for3AO04and0-52for3A06.
6.1.5 J-ZZZ-069 Revision 0 - Out-Of-Tolerance Notification Program (OTN) 6.2 Industry Publication and Standards 6.2.1 NRC Regulatory Guide 1.105 Revision 3 Setpolnts For Safety-Related Instrumentation 6.2.2 ANSI/lEEE C57.13-1993 - IEEE Standard Requirement for Instrument Transformers.
6.3 SONGS Documents and Procedures 6.3.1 NCDBMEL Version 03.03.03 - Nuclear Consolidated Database Master Equipment List.
6.3.2 SONGS 2 & 3 Technical Specifications (See TS Section 3.3.7.)
6.3.3 SONGS 2 & 3 UFSAR Revision 21 (Section 8.3.1.1.3.13) 6.3.4 DBD S023-120, Revision 5 - 6.9KV, 4.16KV & 480V Electrical Systems.
6.3.5 DBD-S023-TR-EQ, Revision 7 - Environmental Qualification Topical Report 6.3.6 DBD-S023-140 Revision 5 - Class 1E 125 Vdc System 6.3.7 SCE Standard JS-1 23-103C Revision 4 - Instrument SetpolntVLoop Accuracy Calculation Methodology 6.3.8 Surveillance Test Procedures for Loss of Voltage (LOVS), Degraded Voltage (SDVS, DGVSS) and Sequencing Relays and Circuits S02-11-11.1 A-2 Revision 4 - S.R. Unit 2 ESF Train A S02-11-1 1.1 B-2 Revision 4 - S.R. Unit 2 ESF Train B SCE26A426FKe.C 3 ][Keference SU] 73-)CV-7.151
E&TS DEPARTMENT l ICCN NOJ I l PRIELIM. CON NO. C-7 I Paae 26 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E41C-130
.. ka:,'T. TI II flra1. fnur I Inftrln.ifnltnnf RPI:IV VIrnI
- 1b1** c ntfetf Ie: .S It:F A 11 A1IfI'ihflhn~aV. Sheet PA nf A%
IJUUJULDU. I *V .. .... VUflat .UI .... L.V 4t S *. - -. VV _S. _V V.
.REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o c. B.White 5/1612005 Joshua Park 5/1562005 =I _
1 C. B.Whittle 5/24/2005 Joshua Park 512412005
.A- Reisin 4-503li- .R.Ui3 ES Tri A S03-Il-1 1.1A-2 Revision 4 - S.R. Unit 3 ESF Train A SO3-11-11.1 B-2 Revision 5 -S.R. Unit 3ESFTra~n B 6.4 Drawings.
6.4.1 Elementary Drawings Unit 2 Unit 3 No. Rev. I Drawing _ No. Rev. Revision A 30220-1 12 2A04 Bus Metering 32220-1 10 3A04 Bus Metering B 30220-2 2 2A04 Bus Degraded 32220-2 2 3A04 Bus Degraded
_ Voltage Detection Voltage Detection C 30230-1 14 2A06 Bus Metering _ 32230-1 9 3A06 Bus Metering D 30230-2 2 2A06 Bus Degraded 32230-2 3 3A06 Bus Degraded Voltage Detection Voltage Detection E 31468 9 Synchronizing SAME Potentials DWG.
6.5 Vendor documents 6.5.1 S023-302-2-518 Revision 0- Instruction Book for ABB Type 27N High Accuracy Relay 6.5.2 S023-302-2-512 Revision 0- Type Test Certificate for ABB 27N Relay 6.5.3 4160 Switchgear Bill of Materials ITE Imperial Corporation 6.5.3.1 S023-302-2-84 Revision 4 6.5.3.2 S023-302-2-85 Revision 3 6.5.3.3 S023-302-2-86 Revision 3 6.5.3.4 S023-302-2-87 Revision 3 6.5.4 CPD-302-3-35 Sheet C Revision 0- Instructions Type CV Voltage Relay 6.5.5 S023-302-2-353 Revision 0 - Indoor Metal-Clad Switchgear 6.5.6 1814-AR286-M0008 Revision O - ABB Type SVF, SVF-1, SVF-3, SVF-31 Relays 6.5.7 S0123-306-6-16 Revision 0 - Volume 1 Digital Fault Recorder for Southern California Edison 6.5.8 1814-AU519-M0003 Revision 0 - Agilent (HP) 3458A Multimeter Specifications 6.6 Miscellaneous 6.6.1 Action Request AR050301091-65 6.6.2 SONGS Licensee Event Report No. 2005-003.
SCE 26426 Rev. 3 iRcference: S01 23-XXIV-7.15]
1CCN NO./J E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 27 of 48 CALCULATION SHEET CCNCONVERSION:
I CCN NO. CCNt Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc Ifor Undervoltage Relay Circuits at Class I E 4 KV Switchgear Sheet 27 of 48 REV ORIGINATOR DATE IE' DATE REV ORIGINATOR DATE I IRE DATE l o C.B.White 5/16/2005 Joshua Park 5/16/2005 j _ _..:
I C. B.WhIttlo 5/24/2005 _ I 7 NOMENCLATURE The following are In addition to the nomenclature of JS-123-103C (Reference 8.3.7).
AR Action Request ABB Asea Brown Boveri CCN Calculation Change Notice DAQ Data Acquisition System DGV Degraded Grid Voltage DGVSS Degraded Grid Voltage Signal with SIAS DO Dropout EC Editorial Correction EDG Emergency Diesel Generator ESF Engineered Safety feature kV Kilovolt LOVS Loss of Voltage Signal LSB Least Significant Bit MFR Manufacturer ms Milliseconds N/A Not Available or Not Applicable NCR Non Conformance Report NSP Nominal Setpoint (SP)
NRC Nuclear Regulatory Commission PT Potential Transformer/Voltage Transformer PU Pickup SDVS Sustained Degraded Voltage Signal SCE 26-426 Rev. 3 f
Reference:
50123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Pace 28 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subiect: TLU Calc for Undervoltane Relav Circuits at Class 1E 4 KV Switchqear Sheet 28 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE G a C. S. Whitte 5/12005 Joshua Park 511612005 la2-,
1 C. B.Whlftle 5/24/2005 Joshua Park 5/24/2005 l 2
-I- - - -
SIAS Safety Injection Actuation Signal SP Setpoint SRSS Square Root Sum of the Squares SWGR Switchgear SWYD Switchyard TCN Technical Change Notice Tol. Tolerance TLU Total Loop Uncertainty TS Technical Specifications UFSAR Updated Final Safety Analysis Report VA Volt Ampere VLL Line to Line Voltage VL-N Line to Neutral Voltage VT Voltage Tap Setting x Reactance SCE 26-426 Rev. 3 (
Reference:
S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT I PRELIM. CCN NO. C-7 Paae 29 of 48 CALCULATION SHEET CCN CONVERSION:
ICN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 8 CALCULATIONS 8.1 Calculation of Primary Element Allowance (PEA) 8.1.1 Calculation of the PT Burden The total burden on each PT is the sum of the parallel burdens across its terminals which are phases A-B for one PT and B-C for the other. There are two circuits per 4kV bus. Each corresponding bus is loaded with Identical loads. For example, referring to table 4.9.2, for circuit 1, the phase A-B Burden Is:
BAB = BTv + B127D3 + B127F3 + B127R3 Where (from table 4.9.1):
BTDV = 0.2 + JO VA B127D3 =0.5+jOVA B127F3 = 0.7 + J2.3 VA B127R3 = 15.15 + 17.72 VA Sum - BAB = 16.55+10.02 VA= 19.35 L 31. 2 9 The other burdens are calculated In a similar manner along with the average, minimum and maximum burdens at +/-10 % difference from the average (per assumption 3.1.12). Note that the Synchroscope burden is not considered per Assumption 3.1.14.
Table 8.1.1 Calculated Burden Calculated Burden Difference From the Average PTTransformer R + IX (VA) Z (VA) L Angle (D) %
BaCb 16.55 +J10.02 19.35 L31.2 -0.16 UndervolBage Clrcuit 1 16.35 + j10.02 19.1 L 31 .5 +0.72 Undorvoltage CIrcuit 2 B a-b 16.83 + j10.02 19.581L30.8 -1.4 Unde CIrcut bi-tage 2 t 16.35 + J10.02 19.18 L31.5 +0.72 Average PT Burden 16.52 + J110.02 19.32 L31.2 NIA Minimum per assumption 3.1.12(-t1D %) 14.87 + J9.02 17.39 L31.2 -1.93 (-10%)
Maximum per assumption 3.1.12 (410 %) 18.1 7 + 11.02 21.25 L31.2 +11.93 (+10%1/)
Therefore, per assumption 3.1.12 the PT burden for all PT's will be 19.32 L31.2 (* 10%).
SCE26-426 Rev. 3 IRefcren= S0123-XOIV-7.15)
ICCN NOJ o E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paoe 30 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
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- qr) nf AR 11Z REV ORIGINATOR DATE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. Whittle 5/612005 Joshua Park 5116/2005 1ii 1 C. B. Whtle 5/24/2005 Joshua Park 1524/2005 z
-- I , ___
8.1.2 Calculation of the PT Ratio Correction Factor and Accuracy As determined in Section 5.1.2, Equation 5-1 provides the RCF for the transformer for a given burden, with measured values of the true ratio and phase angle at zero burden, and one other burden. Manufacturer tag data from Attachment 9.1, along with the calculated burden for the transformer is used to find the applicable RCF, and thus the accuracy of the potential transformer voltage. (Note that the angles are all in radians.)
Equation 5-1 1
RCFC = RCFo + [-j[(RCF, -RCFo)Xcos(6, -0) + (y, - ro)xsin(C, -0S)]
The following is an example of RCF Calculation for the average PT Burden:
RCFo = 0.9974 + [1;952]X...
[(1.0019 - 0.9974 )x cos( 0.5548 - 0.5445 ) + *--
(- 0.000582 - 0.000291 )x sin( 0.5548 - 0.5445 )]= 0.9985568 et = cos'(.85) = 31 .790 = 0.5548 radians (Section 4.3, Y Burden) e, = = 31.2° = 0.5445 radians (Table 8.1.1)
RCF 0 = 0.9974 (Section 4.3, No Burden)
RCF,= 1.0019 (Section 4.3, Y Burden)
Br = 19.32 VA (Table 8.1.1)
B. = 75 VA (Section 4.3, Y Burden) yo = +1 minute = 0.000291 radians (Section 4.3, No Burden) yt = -2 minutes = -0.000582 radians (Section 4.3, Y Burden)
RCF values were similarly calculated for the minimum and maximum burdens (as calculated Inthe previous section). The results, including percent error from the average RCF, are summarized in the following table:
SCE26-426 Rev. 3 IRKefernce: 50123-XX1V-7.15J]
l ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-7 Pace 31 of 48 CALCULATION SHEET I CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class lE 4 KV Switchgear Sheet 31 of 48 REV 1 ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B.WhitUte 5/1612005 Joshua Park 5/16/2005 i 1 C. B.Whittle 5/24/2005 Joshua Park 5/24/2005 l Table 8.1.2 Calculated Burden Calculated RCF R Percent AF Error from the Average PT Burden 19.32 L31.2 0 0.99856 N/A Minimum per assumption 3.1.12 17.39 L31.20 0.99844 -0.012 %
(-10% burden)
Mainnn per assumptIon 21.25 L31 .2 0.99867 +0.012 %
Therefore the RCF to be used In the calculation of the setpoint Is:
RCF = 0.99856 From Table 8.1.2, the error In the RCF due to a 10% burden uncertainty Is +/- 0.012 %.
This uncertainty will be applied as a bias:
PEAB,,d = t0.012%
Assumption 3.1.9 specifies an additional Independent, random error of 0.05% will be applied to the PT. Therefore:
PEApT = s0.05%
8.1.3 Voltage Drop from the PT to the UV Relay (PEAvD).
Per assumption 3.1.15 a bias will be applied to the accuracy to account for the voltage drop from the PT to the UV Relay of -0.02 Vac maximum drop and 0 Vac minimum drop.
Converting to percent:
= - 0.02/1 8*100 = -0.01 7%
Therefore:
-PEAVD = -0.017% (Bias) and 4PEAvD = 0 % (Bias) 8.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLU) 8.2.1 Individual Uncertainties associated with Undervoltage Relay TLU 8.2.1.1 Primary Element Allowance (PEA) (as determined in section 8.1 above).
PEAVD =+0%1-0.017% (Bias)
PEApT -0.05% (SRSS)
SCE26-426 Rev. 3 I
Reference:
SO0123-XXIV-7.15]
ICCN NOJ 2 E&TS DEPARTMENT l PRELIM. CCN NO. C-7 lPaae 32 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 &3 Calc No. E4C-130 I adz _ in n-
-. t0- n ot IF id_ _ . . I---
rLABmd = M.U 1= -70 !k014) 8.2.1.2 Device Tolerances 8.2.1.2.1 Drift Allowance (D)
Per assumption 3.2.2 the drift allowance for the Undervoltage Relay Is:
D = +/-0.1%
8.2.1.2.2 Power Supply Allowance (PSe)
Per design input Section 4.6 the DC power supply to the Undervoltage Relay varies no more than 103 to 140 Vdc under all operational conditions. The manufacturer's stated accuracy for allowable do control power range from 100 tol40 Vdc is +/-0.1% (Section 4.2). Therefore the relay is operating within the manufacturer's allowable range and PSe is:
PSe =0.1%
8.2.1.2.3 Temperature Allowance (Te) (normal & accident)
The range of temperature operation for the ESF SWGR room vary from a low of 55 0F during normal conditions to a high of 95 OF during accident conditions (Section 4.4). This temperature range Is bounding for normal conditions. Per Assumption 3.1.1 3 the relays will experience this same temperature difference. Therefore:
AT=95-55=40 F0 The manufacturers stated temperature effect is + 0.4 % for a temperature range of 10 to 40 2C. Therefore the temperature effect Is:
+/-0.4 / (40-10) - 5/9 = +/-0.00741 %/F0 Then, the temperature effect (Te) is:
Te = +/-0.00741
- 40== 0.297 %
8.2.1.2.4 Seismic Effect (Se)
Per Assumption 3.1.7 Seismic effect is negligible. Therefore, Se =0 8.2.1.2.5 Radiation Effect (Re)
Per Assumption 3.1.6 the Radiation effect is negligible. Therefore, Re=0 SCE26.426 Rev.3 I
Reference:
S0123-XXIV-7.15)
ICCN NOI E&TS DEPARTMENT I PRELIM. CCN NO. C-7 Paae 3-3 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-1 30
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1CV _Qw~tr-hn~rh Sheet 33 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o O C.B.Whlttle 5/162005 JoshuaPark 5t16/2005 ii al' C.B. Whittle 5/24/2005 Joshua Park 5/24/2005
--- I -_
See section 4.5 and assumption 3.1.3 for information regarding accuracy, ranges and conditions of use. Since the M&TE has an auto-range feature (switching to the 1000 Vac range at 120 Vac), the M&TE Tolerance is calculated for both the 100 Vac and 1000 Vac range, however only the larger uncertainty (1000 Vac range) Is used in the TLU calculation. Note that these calculations are based on the 118 Vac point of interest as discussed in Assumption 3.1.1.
8.2.1.3.1 M&TE Accuracy (MTEA)
The accuracy for the 10OVac range (120 Vac maximum reading) at 40Hz to 1kHz in the Synchronous mode is:
MTEA12D = +/-(0.02% of reading + 0.002 % Range)
= +/-(0.02% + 0.002% 120/118)
= +/-0.023 %
The accuracy for the 1OOVac range at 40Hz to 1kHz In the Synchronous mode is:
MTEA k = +/-(0.04% of reading + 0.002 % Range)
= +/-(0.04% + 0.002% 1000/118)
= +/- 0.057 %
8.2.1.3.2 Readability (R) (least significant digit for digital M&TE)
R1 2 0 = +/-0.00001 Vac
= +/-0.00001 Vacll8 Vac
- 100 = +/-0.00001%
H 0 (per Assumption 3.1.11)
Rik = +/-0.0001 Vac
= +/-0.0001 Vac/118 Vac
- 100 = +/-0.0001%
E O (perAssumption 3.1.11) 8.2.1.3.3 M&TE temperature effect (MTETO)
Temperature Coefficient for reading outside of +/- 1.8 F0 (+/- 1 C0)of the last ACAL is +/-(0.001 % of reading + 0.0001 % Range)/C" therefore based on assumption 3.1.3 of a calibration temperature range of +/- 9 F0 (+/- 5 C")
and converting to F0 from C":
MTET, 120 = +/-(0.001 + 0.0001
- 120/11l2* 519* 9 % = +/-0.006 %
MTET,1k =:+/-(0-001 + 0-0001' 1000/118) 5/99 9 %= +/-0-010 %
8.2.1.3.4 M&TE Reference Standards (MTERs)
The reference standard accuracy Is assumed to be 25% of the M&TE accuracy per JS-123-103C (reference 6.3.7). Therefore:
SCE26-426 Rev. 3 fRefereice: S0123-XXIV-7.151
lICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-7 IPace 34 of 48 CALCULATION SHEET lCCN CCONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4CG130 C.a.hlt. TrlL.1JI I OUULJe, L.LI vu u
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- a Ij.Iu **
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- tW Althriner ISheet 34 of AR REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE cc 0 C. B. Whittie 516/2005 Joshua Park 5/16/2005 I c 1 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 RE
-I.. . - -
MTERS120 =0.023%* 0.25 = i0.006 %
MTERs1k = 0.057 %
- 0.25 = +/-0.015 %
8.2.1.3.5 Total M&TE Tolerance The total M&TE allowance is the SRSS of the four components determined above. That Is:
MTE = +/- (MTEA2+ R2 + MTETe 2 + MTERS2)'12 MTE120 = +/- (0.0232 + 02 + 0.0062 + 0.0062)M MTE 12o =+/- 0.025/o MTElk = +/- (0.0572 + 02 + 0.0102 + 0.0152)1/
MTE1k = +/- 0.060%
Therefore, applying the greater (1kV range) allowance:
MTE = +/- 0.060%
8.2.1.4 Setting Tolerance (ST)
Per Assumption 3.1.2 the setting tolerance Is *0.1 Vac, therefore:
ST = +/-0.11118*100 = +/-0.085%
8.2.1.5 Miscellaneous Allowance (Ma)
Per assumption 3.1.1 0 the miscellaneous allowance is:
Ma=+/-0.1 %
8.2.2 Combination of Uncertainties Combining the uncertainties per the equation from Section 5.2.2, the TLU is:
ST 2 + Ma2 + pEA,, 2 TLU =iTe2 tD 2 +PSe2 + Se2 +Re 2 +MTE 2 + PEABURD +pEA 1
-PEAvo = -0.01 7%
+PEAVD =0%
PEABuRD = +/-0.012%
PEAPT = +0.05%
Te = +/-0.297%
D =.1%
PSe = *0.1%
Se = N/A Re = N/A MTe = +/-0.060%
SCE 26426 Rev. 3 Rcefcrence: S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-7 Pace 35 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class I E 4 KV Swltchaear Sheet 35 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE' OC. S. WhI e 5116/2005 Joshua Park S/1612005 _2 1 C. B. Whtle 5/24/2005 Joshua Park 5/24/2005 ST = +/-0.0850/o Ma = 0.1%
+TLU = +( 0.2972 + 0.12 + 0.12 +02 +02 +0.0602 + O.O852 + 0.12+F0 0 52) " + 0.01 2 + 0 % = +0.375%
- TLU = -( 0.2972 + 0.12 +0.12 + 02 + 02 + 0.0602 + 0.0852 0.12+ 0.o52)% - 0.012 - 0.017% = -0.392%
Rounding conservatively to the larger TLU value:
TLU = +/-0.40% OR
=+/-i0.40%* 118 = +/-0.48 VacattheUVfRelay OR
= +/-0.40%
- 118 * (35
- 0.99856) = :1 6.5 Vac at the 4kV Bus 8.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT)
The allowable value allowable values during surveillance test (relay only)
AVT=2 +ST2 +R 2 ST = Setting Tolerance: :*0.085%.
D = Drift: *0.1%
R = Readability of M&TE: = *0.00001 / 118 Vac
= 0.00001 % E 0 (Negligible per 3.1.11)
Therefore, the Tolerance for allowable value Is:
AVT =g(0.0852+0.12+*2)1r2% = +/-0.132% OR
= +/-0.132%* 118 = +/-0.16 Vac at the UV Relay OR
= +/-0.132%
- 118 * (35
- 0.99856) = :5.5 Vac at the 4kV Bus 8.4 Calculation of Undervoltage Relay PU and DO Setpolnts 8.4.1 Undervoltage Relay Undervoltage Dropout (DO) Setpoint (SP3 0 )
8.4.1.1 Calculation of Dropout (DO) Setpoint SPDO The undervoltage relay dropout setpoint, is determined by: II SPDO = ALL + (-TLU) + M SPDO = 4106 + 16.5 + 6 = 4128.5 Vac at the 4kV Bus OR SPDO (4106( + 16.5 + 6)1(35
- 0.99856) = 118.13 Vac at the UV Relay 8.4.2 Undervoltage Relay Pickup (Reset) Voltage Setpoint (SPpu) 8.4.2.1 Calculation of Relay Pickup Setpoint SPpu SCE 26-426 Rev. 3 I
Reference:
S01 23-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 36 of 48 CALCULATIUN SHEE I CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Swltchgear Sheet 36 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE O C. B.Whittle 5/16/2005 Joshua Park 5/16/2005 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 Based on the method outlined in section 5.4.2.1, the Relay Pickup Voltage Setpoint Is determined by adding the deadband of 0.3 Vac (see 3.2.1) to the Dropout (DO)
Setpoint (SPDo), Therefore:
SPpu = SPCO + DB = 178.13 + 0.3 = 118.43 Vac at the UV Relay OR SPpu = 118.43 * (35
- 0.99856) = 4139.1 Vac at the 4 kV bus 8.4.2.2 Determination of Margin of PU Setpoint to the PU Upper Analysis Limit (Mpu)
Mpu = A pu - (SPpu - (-TL U) )
Mpu= 4161 - 4139.1 - 16.5 =5.4 Vac at the 4 kV bus 8.5 Calculation of Undervoltage Relay PU and DO As-Found/As-Left Acceptance Bands 8.5.1 Calculation of Undervoltage Relay As-Found Acceptance Band The As-Found Acceptance band will be the relay pickup or dropout setpoint +/-AV (allowable value).
As-Found Band for Dropout = 118.13 +/-0.16 Vac
= 117.97to 118.29 Vac at the UV Relay OR
= 4128.5*5.5 Vac
= 4123.0 to 4134.0 Vac at the 4kV Bus As-Found Band for Pickup = 118.43+/-0.16 Vac
= 118.27to 118.59 Vac at the UV Relay OR
= 4139.1 +/-5.5 Vac
= 4133.6 to 4144.6 Vac at the 4kV Bus 8.5.2 Calculation of Undervoltage Relay As-Left Acceptance Band The As-Left Acceptance band will be the trip or reset setpoInt GST (setting tolerance) .
As-Left Band for Dropout = 118.13 +/-0.1 Vac = 118.03 to 118.23 Vac As-Left Band for Pickup = 118.43 +/-0.1 Vac = 118.33 to 118.53 Vac 8.6 Calculation of Minimum and Maximum Relay DO and PU at the 4kV Level The Minimum and Maximum Relay DO and PU Values are calculated by applying the TLU to the nominal setpoint. Results are rounded conservatively (up for maximum, down for minimum).
Maximum PU = (118.43 + 0.48) = 118.91 Vac at the UV Relay OR
= (118.43 + 0.48)*(35
- 0.99856) = 4155.9 Vac at the 4kV Level Maximum DO = ( 118.13 + 0.48) = 118.61 Vac at the UV Relay OR
= (118.13+ 0.48)*(35
- 0.99856) = 4145.4 Vac at the 4kV Level Minimum PU = (118.43- 0.48) = 117.95 Vac at the UV Relay OR SCE 26-426 Rev. 3 (Reference S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paoe 37 of 48 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN Projector ECP: SONGS 2 & 3 Calc No. E4C:130
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- tJ I
ay Cnltanl
- LV fI51*reidtie st Clacc II- A KV-
,witrhnpar Sheet 37 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l O C. B. Whitle 5/16/2005 Joshua Park 5tl612005 _ l Z§ 1 C. B. Whittle 5/24/2005 Joshua Park 5t24/2005 _
= (118.43- 0.48)*(35
- 0.99856) = 4122.3 Vac at the 4kV Level Minimum DO = (118. 13 - 0.48) = 117.65 Vac at the UV Relay OR
= (118.13- 0.48)*(35
ICC.C NOC E&TS DEPARTMENT PRELIM. CCN NO. CJ7 Pace 38 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Subihit:ret TLU Cale for Undarvoltane Relav Circuits at Class 1E 4 KV Swltthanear Sheet 38 of 48 REYV ORIGINATOR lDATE l IRE DATE REV lOIGINATOR DATE IRE l DATE O C. B. WhIttle 5116/2005 Joshua Park 5/16/2005 G 2 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 NM
- - I . - . .-
9 ATTACHMENTS 9.1 Potential Transformer Data Tag This tag was copied during a walk-down of the SONGS Mesa warehouse spares. Three spare were located, one spare did not have a tag, all data on the other two tags were identical except for the serial numbers.
Type.JVM-3 763X021026 C(2I Ratio 35:1 serb 5868022 t_I I- I 0i i Rated Secondary Volts 120 Test Frequency 90 HZ I Secodary Secwdaryphase Angle 5X, surdenr Voltar l Ratlo Correction faotor (inutes) Ia I O VA 120 0'. 9974 +1 120 1 1.0019 -2 -I .
I Date: 2111104 Tatted by: DC SCE 26-426 Rev. 3 J
Reference:
S0123-XXIV-7.15]
I ICCNNOJ C E&TS DEPARTMENT l PRELIM. CCN NO. C-7 l Paoe 39 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
Il
- . a LC
{A.
lot l ---
aunuw'vLua' mtciiv Circiat at Class I E 4 KV Switchmear Sheet 39 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE cc o C. B. WhiWe 516/2005 Joshua Park 5/16/2005 i 1 C. B. WhMMe 5/24/2005 Joshua Park 5/24/2005 _-
.2 WestInghouse V2Transducer Data Sheet ________
Applicstlon~ ate434560 Page=3 Type V.2 Transducerm Part It Spec~ficatlioni and Technical Data
- 3. TYPe V32.541 Cwuan% Transducer (I) Specinicsdons Stjmdar iftV9 g..........0.5 arapp Spocif 1I............ S"~If e'd nITM6,aI~ell WVI to 20 ."fvs Fotequ.*les............E H* JuUDOA34 aft SOKg eJAd dOOHi)1
.16 ............ IMA. belated 1,8 PDWwua.c.........10.00 F4 ohms *1%
.sek ........... '%. lnzbjOed in accurvey uawt
.hoM............ 1%A Si reI@rFco CeAditioftI wott 10 ohm los4 Loss............. 0.2volt amomte War. U~phiffe......... N89ligble 110oAM"rw 1.........0.15 saeonds. w4qa.'numf Ah~ei~a~~wuIRS-0 nc.. .. I%ftlairumwj icr *I0'C ~tI m 25'C Tepo~, fneverica . ... 2%. 25C la 611C
£fl.,s 2%.25'C to -2VC F..I..............*1.0% la? malsgmjm for *10% chasiqt Infrnqwvar~
okahcac Toil .......... 500 volta far, W~irq V~ 10 Coovi¶ .. 1..1I00voN&U4Ik Omasni of Asturs) ....... cosstinout. 200%
4stflrUE. 100%
IBowe. 1000%
AR41 .............. 41%(ok Pan 1.Section L Oa"27)
)A&Wmam Cajuass........ smlof
- 4. Type VE24411 Voltage TransdUvor Same as lot V12441 (Panetaph 3) except Lou... .... . wQ 001.2 w.Mpf S. 'Type VE24841 Suppressod Zera Voltage Transducer some as fat VMS.U 1P'"Groph 3) except Loudw
............ A0.S0 waft-s' W~nho~. £heMICcCeeormWan Reasy ll"AVnamen: Dhillbrk dwalk. H. J. 071 01
- -- - - . - __ - I I .1 SCE 26-426 ev.3 lKeterenCe ~,uiia-z-iUv-'.'-JJ
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-7 Paae 40 of 48 CALCULATION SHEET CCN CONVERSION:
CON NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 C-kt-t Tl I I Inlr- feor I InrelmnItano Palau Cirrcvitc at Clnasc IF 4KV A SRwitchnanr Sheet 40 of 4R IJUujuk. *_ _ - V . I - -. - .-
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o O C.B.WhHte 5/1512005 Joshua Park 51512005 i S 1 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 = 2
-I- - - I --
9.3 Correspondence with ABB Engineering Concerning Type 27N Relay don.p.steltfzus.zbb.c To: whtllcbOaongssce.corn om conklilt~songs.sce.com, kimJlOsongssco.com, 011.aPM
=2=5 urlMa~aongsasce-comn oj 0t:16 PM Sbec Rae: Type 27N Raeay Model 41tT6375 Spacltfceclons.
Butch As long as the Eaiustnent can be made thre Is rno problem with the relay. Again the only thing to watch or Is relay chatter If the pick up and drop out are set to close and the voltage Input varles. Time delay should take care of thls.
There will be no problmes In operating the relay at this settIng Thanks Don MMese fmrm wh bvft0=s.souex= rscelved on o029tC 10:54 AM 041211205 ¶0.54 AM wtitrbOsong9.scexcom To Don P. S6IZAULSTRAB3 0ASB Sublect 7pe 27N Relay Yodel 411T375 Spedacalons.
Hi Don, X Just noticed that zry original email stated that we were setting our 27N Relay deadhand at 0.3%b. This should have been 0.3 Vac. This is equal to 0.254%s of our approximately 119 Vac trip. Our technicians have been able to snake this adjustment on the bench.
Please let me know if this is alright.
Thanks, Butch Whittle 463-3599 Poxwarded by BEITCH WHITlE/SCNGS/SCI/P on 04/29/2005 07:47 AM BUTCH WHITTLE To:
don.p.steltzous .abb.com 04/18/2005 12:47 Cc: LfL'DA CO9XBIN/SONGS/JSC5EIXOSCE, JEFF PM SUDf/SrJNGS1SaE/EnCQScZ, aOON XJ2A/S0NGS/SCE/ZXiX9SCZ, ?ALn BAGHAM/S0NGD1SCE/B=2XSCE, SCE26426 Rev. 3 fRefernce: S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Pace 41 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calo No. E4C-130 kente+ Al AD s .~ c Pla4 4M A tt1I QvihTesm- TI II 'ale' fewr I Inrlerudfan tnlftir e Ir&,igIfe 4.u....e nf
- -- --. * -J*A4L- . ..... V *StJLO I~L-. -7 IV V J VW I %.,114U01j I -I IW4 rT* WIl -tL I
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.B.White 5116/2005 Joshua Park 5/16/2005 = = ;
C. B.WhItte 0 5/2412005 Joshua Park 5/24/2005 _
- II PROML K D0TT/SONGS/SCB/EIEZSCE, KXIBERLY MOSLEY/SONGS/SCE/EBxaSCE, CECIL BAZLEY/SoNGs/ScE/E2XsCE
Subject:
Type 27N Relay Kodel 411T5375 Specifications.
To.: Yr. Don Steltz of ABB Power
Dear Yr. Steltz,
As you know San Onofre Nuclear Generating Station has a number of AfB Type 27N Relays (Model *41IT5375 with BF filter). We are currently involved in a effort to reduce the uncertainties associated with the PU and DO voltage setpointS. Additionally we wish to reduce the deadbppd (difference between the PU and DO voltages) to 0.3 % versus the A9B specified 0.5%.
I would like to verify the following information that I received per our telephone conversation today.
1.) Effect of Reduced Deadoand on Accuracy: The deadband is field adjustable and can be set to less then the specified 0.5% with no effect on the basic 0.1 % accuracy of the relay PU and DO voltages. The prmary consideration of reduced deadband would be thc cycling of the relay, if the voltage were to swing rapidly. SOWNS currently is using a 2 second delay and therefore this effect would be minimized.
2.) Tsserature Effect: Per the test data that we received from ABB, the teaperature effect is linear over the 10 - 40 degree C torperature range.
Therefore, if we reduce the operational temperature band by one-half the uncertainty will be reduced by one-balf. That is, the uncertaintly due to the temperature effect would ),e reduced from 0.4% to 0.2%.
3.) Drift (time related): aBB reconmends a recalibration interval of one to two years to ensure that the accuracy of the relay is maintained within the 0.21 repeatability specified. Therefore, the relay is relatively stable with respect to tine and should drift by no more that 0.1% in 24 months. if you have any additional data concerning drift, I would appreciate a copy.
Thanks, C B Whittle (949) 463-3599 5LnZb-42 KeVY.J IKRe =CCCe: iU17i-MIV.7.15J
E&TS DEPARTMENT l ICCN NOJ I I PRELIM. CCN NO. C-7 I Paae 42 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Sublect: TLU Calc for Undervoltaae Relav Circuits at Class I E 4 KV Swltchnear Sheet 42 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE O C. B. Whitle S/ 6/2005 Joshua Park 5/16120051 2 t C. B. Whittle 5/24/2005 Joshua Park 5124/2005 M
-- I . 11 9.4 Correspondence with GE Confirming Potential Transformer Model Number Change.
Trenheagen, Chris To: <WhtIlb songawse.com>
%(GEEnerM' cc: xdmJPOaongsAce.com>
ge. subJect 2c0rls5enha0gen:
- RE: Type JVM-3 Mcdel Numbers 643X94 versus Model Number 783X02 * .. . . ...
05M02D00 08:09 PM.
Butch
'Yes, 643x94 ias thb old 6 digit cat nib nber, replaeed by by tte current 10 digit system. On our strucd:ture, it reads like thin:
5/02/05 23:01:D7 ATRIT1 PART NUMBER: 643X094000 TYPE Jvx-3 MODEL V' RATIO 35:1 HERTZ 50-60 D2L 60 SEC .VOLTS 120 REC XB8P N WEIGHT PRI VOLTS 4200 CUSTOMER NQMBER NSV XF/IA/KVA AT 30C 750 ON NP 643X094000 BF/VAIKVA AT 55C 500 ACC CLIAT 60 NZ 0.3 WX,M,Y PALLET PAC=
. M .O REPLAED BY 763X021026 The analysis I provided should apply very closely for both old and new products.
Chris
--- orginal Message-----
Fom.: whittlcbOsongs.sce.con Imailto:whittlcb~songs.sce.con]
Sent: Monday, May 02, 2005 5:16 PM To: Tenhaagen, Chris (GE Energy)
Cc: kirmjigsongs.sce.com
Subject:
Type VM-3 Model Waurbers 643X94 versus Model Nmiber 763X02 Hi Chris, We have Model number 643X94 installed in the plant versus the model 763X02 that we have in the wearhouse. Is the Tag Data from the warehouse '
transformers applicable to the installed transformers? I can't find any information in the online resources for the older (installed transformers.
Thanks, C B Whittle (949) 463-3599 (cell)
SCE 26-426 Rev. 3 1Referener: SO]23-XXrV-7.15]
A
ICCN NOJ E&TS DEPARTMENT I PRELIM. CCN NO. C-7 I Paae 43 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C.130
-uuJ-.-L.
TLII art-itfl ffr e
I InrekniItanei nelau
-v-
- a ir, its nt Class IP A KV.w- qwItthnhryar - Sheet 43 of 48 vet go o_ME--
l_ -
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE E O 1 C. B.Whl~e 5/16/2005 Joshua Park S/16/2005 g a; 1 C. B. WhitUle 5/2412005 Joshua Park 5/2412005 I ,I. -
9.5 Degraded Voltage Relay Cable Voltage Drop Calculation
- 1. Purpose/Scope The purpose of this Attachment is to calculate the maximum voltage drop in the cable between the potential transformer (PI) and the degraded voltage relay (27N). The affected relays are those located in 4.16 kV Switchgears 2A04, 2A06, 3A04 and 3A06.
- 2. Results/Conclusions The maximum cable voltage drop between the secondary terminals of the potential transformer and the degraded voltage relay is 0.02 volts.
- 3. Assumptions Assumptions Requiring Verification NONE Assumptions Not Reguiring Verification 3.1 The longest cable length between the fuse and the degraded voltage relay terminal is assumed to be at the Switchgear 2A04. In Switchgear 2A04, the fuse is located in Cubicle 15 and the relay is in Cubicle 21. The total length of this section in the switchgear is 17 feet and 8 inches (See Reference 6.1.1). The height is approximately 7 feet and 6 inches. The total cable length is approximated at 40 feet, with some margins.
3.2 The potential transformers and the fuses are located in Cubicle 15 (same for all four switchgears).
The cable length between the secondary of the potential transformer and the fuse is assumed as 15 feet. See Reference 6.1.1.
3.3 It is assumed that all potential transformer load, except the degraded voltage relay (Z2 ) can be approximated as one lumped load (ZI) as shown in Figure 1.
- 4. Design Inputs 4.1 The 4.16 kV Switchgear 2(3)A04 and 2(3)A06 bus potential transformers are located in Cubicle 15.
See References 6.1.1 to 6.1.14.
4.2 At 4.16 kV Switchgear 2A04, 2A06, 3A04 and 3A06, the degraded voltage relays are located in Cubicle 21, 17, 20 and 17, respectively. See References 6.1.1 to 6.1.14.
SCE26426 Rey. 3 1
Reference:
S0123-XXIV-7.15]
iCCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paoe 44 of 48 LALCULAIOUN bHEEIT CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Catc No. E4C-130
Subject:
TLU Caic for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet 44 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B.Whitto 5/1612005 Joshua Park 516/20051 i i 1 C. B. WhItle 5/24/2005 Joshua Park M524/20051 4.3 Cable size #12 AWG is used between the secondary terminals of potential transformer and fuse.
See References 6.1.1 to 6.1.14.
4.4 Cable size #14 AWG is used between the fuse and degraded voltage relay terminal.
4.5 Per E4C-086, Section 4.5 (Reference 6.4.1), the cable impedance of a #12 AWG and #14 AWG is:
Z7#14AWG = 0.3135 +j 0.00765 ohms/100 ft Z#i2AWG = 0.1972 +j 0.00710 ohms/100 ft The cable resistance is based on an ambient temperature of 751C.
4.6 The burden of degraded voltage relay (127D-1, 2, 3 & 4) is 0.5 VA (purely resistive) per Reference 6.3.1 4.7 The burden of loss of voltage relay (127W-1, 2,3 & 4) is 0.7 +j 2.3 VA per Reference 6.3.2.
4.8 The burden of residual voltage relay (127R-1, 2, 3 & 4) is 0.288 VA (purely resistive) per Reference 6.3.3.
4.9 The burden of digital fault recorder (DPR) is 0.288 VA (purely resistive) per Reference 6.3.4, page I-21.
4.10 The burden of voltage transducer TDV1 is 0.2 VA per Attachment 9.2 4.11 The maximum switchgear room temperature is 950 F per Reference 6.4.2.
- 5. Methodology 5.1 The voltage drop across the cable between the secondary of the potential transformer and the degraded voltage relay will be calculated using the rated burden at 120 Vac. The total PT burden will be divided into two groups. Loads that are located in the Cubicle 15 will be lumped into one group (Za). The other burden will be the degraded relay (Z 2 )
5.2 The impedance of the fuse and the test switch will be ignored in the calculation. However, a margin will be added to the calculated total voltage drop to account for voltage drop in the fuse and the test switch.
- 6. References 6.1 Design Drawings 6.1.1 30107 Rev 14, Oneline, 4160V Switchgear Bus 2A04 (ESF) 6.1.2 .30220 Sheet 1,Rev 12, Elementary, 4.16 kV Bus 2A04 Metering 6.1.3 31763 Sheet 15, Rev 14, Wiring Diagram, 4160V Switchgear 2A04 SCE 26-426 Rev. 3 l
Reference:
S01 23-XXIV-7.151
I ICCN NOJ E&TS DEPARTMENT PRELIM. CCN ND. C-7 Pace 45 of 48 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Csubject: TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchqear REV ORIGINATOR l DATE/ l C.. WhlItte 5/12/2005 IRE Joshua Park DATE 5/1412005 REV ORIGINATOR DATE l l
Sheet 45 of 48 IRE DATE l Ij I C.B. WhItUe l6/242005 lJoshua Parkc 5/2412005 l lf _
6.1.4 31763 Sheet 21A, Rev. 1, Wiring Diagram, 4.16kV Switchgear 2A04 6.1.5 30109 Rev 15, Oneline, 4160V Switchgear Bus 2A06 (ESF) 6.1.6 30230 Sheet 1,Rev 14, Elementary, 4.16kV Bus 2A06 Metering 6.1.7 31764 Sheet 15, Rev 18, Wiring Diagram, 4160V Switchgear 2A06 6.1.8 31764 Sheet 17A, Rev. 1,Wiring Diagram, 4.16kV Switchgear 2A06 6.1.9 32107 Rev 14, Oneline, 4160V Switchgear Bus 3A04 (ESE) 6.1.10 32220 Sheet 1,Rev 10, Elementary, 4.16 kV Bus 3A04 Metering 6.1.11 33763 Sheet 4, Rev 1, Wiring Diagram, 4160V Switchgear 3A04 6.1.12 32109 Rev 17, Oneline, 4160V Switchgear Bus 3A06 (ESF) 6.1.13 32230 Sheet 1,Rev 9, Elementary, 4.16kV Bus 3A06 Metering 6.1.14 33764 Sheet 4, Rev 1, Wiring Diagram, 4160V Switchgear 3A06 6.2 Vendor Drawings 6.2.1 S023-302-2-131 Rev. 1, Connection Diagram, Bus 2A04 and 3A04 6.2.2 S023-302-2-141 Rev. 1, Connection Diagram, Bus 2A06 and 3A06 6.2.3 S023-302-2-452 Rev. 7, Connection Diagram, Bus 3A04 Cubicle 15 6.2.4 S023-302-2-396 Rev. 6, Connection Diagram, Bus 3A06 Cubicle 15 6.3 Vendor Instructional Manuals 6.3.1 S023-302-2-518 Rev. 0, Instruction Manual for ABB Type 27N High Accuracy Relay 6.3.2 CPD-302-3-35 Sheet C, Rev. 0, Instructions Manual Type CV Voltage Relay 6.3.3 1814-AR286-MOO08 Rev. 0, ABB Type SVF, SVF-1, SVF-3, SVF-31 Relays 6.3.4 S0123-306-6-16 Rev. 0, Volume 1, Digital Fault Recorder for Southern California Edison.
6.4 Calculations 6.4.1 E4C-086 Rev. 5, SONGS 2 & 3 Data Development and Documentation 6.4.2 M-0073-061 ICCN C-12, Normal Environmental Conditions for the 4kV Switchgear Protective Relay Setting Calculation.
- 7. Calculations SCE 26-426 Rev. 3 IKeference: Sul123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-7 Paae 46 of 48 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN Project or ECP: SONGS 2 & 3 Cabc No. E4G-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear Sheet 46 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C. B. Whittle 5/16/2005 Joshua Park 5/16/2005 2 2 I C. B. WhMte 5/24/2005 Joshua Park 5/24/2005I PT Circuit #2 has more loads connected than PT Circuit #1. Therefore, PT Circuit #2 will be used to evaluate the total voltage drop in the cable. See also tables in Section 4.9.1 and 4.9.2 of the main section of this calculation.
Figure 1 shows a simplified connection diagram used to calculate the cable voltage drop for the degraded voltage relay:
Z#12 z4 14
. 112 0 I+V 14-[l
'I +.
Figure 1. Degraded Voltage Relay cable voltage drop calculation Where Z 4 I2 is the cable impedance of #12 AWG Z#14 is the cable impedance of #14 AWG Zi is the burden of connected loads not including the degraded voltage relay Z2 is the burden of degraded voltage relay V112 Voltage drop across cable #12 AWG V#14 Voltage drop across cable #14 AWG I, Load current 12 Degraded voltage relay load current 7.1 Calculate Load Burden Current I, is calculated by dividing the total load volt-amperes by the rated voltage. The connected loads are 127R, 127F, digital fault recorder and the voltage transducer.
S127R =15.15+j7.72 VA S127F =0.7+j2.3 VA SDFR =0.288+jO VA SCE 26-426 Rev. 3 i
Reference:
50123-XXIV-7.15]
l ICCN NOJ I E&TS DEPARTMENT l PRELIM. CCN NO. C-7 Paae 47 of 48 CALCULATION SHEET ICCN CONVERSION:
I CCN NO. CCN1 Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet 47 of 48 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l O C. S. Whte 5/16/2005 Joshua Park 5/16t2005 C. B. Whtlle 5t24/2005 Joshua Park 5/24/2005 STDvi = 0.2 +j O VA S1 = S127R + S127F + SDFR + STDVI
=16.4+j 10.02 VA S2 =0.5+jO VA 7.2 Calculate Cable Resistance at 95°F (35°C)
The cable resistance is calculated using equation:
R2 =RI * (234.5 + T2 ) / (234.5 + T1 )
Where T1 is 75°C R1 is the resistance at 750C T2 is 35°C R2 is the resistance at 35°C The cable resistance at 35°C is:
Z#*4AWG = 0.2730 +j 0.00765 ohms/100 ft Z#12AWG = 0.1717 +j 0.00710 ohms/100 ft 7.3 Calculate Load Current II =S1/120 0°
_ 0.14 +j 0.084 A
=0.163 /30.96° A 12 = S2 / (120 Z 0)
= 0.0042 / 0° A SCE 26-426 Rev. 3 {
Reference:
S0123-XXIV-7.l5
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-7 IPace 48 of 48 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Swltchgear II Sheet 48 of 48 REv ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l =
0 C.B.Whitte 5/16/2005 Joshua Park 5/16/20051 a, 1 C.B.Whittle 5/24/2005 Joshua Park 5/24/2005 =
I . .
7.4 Calculate Cable Impedance Cable impedance is double to account for the return path. The circuit is only grounded at one point in Cubicle 15.
2~14 = 2 * (40 ft I 100 ft) * [ 0.2730 +j 0.00765] ohms
= 2* (0.1092 + j 0.0031) ohms
= 0.2184 Z 1.63° ohms 2 12 =2* (15 ft/ 100 ft) * [0.1717+jO.00710] ohms
= 2* (0.0258 +j 0.001065) ohms
= 0.0516 L2.36° ohms 7.5 Calculate Total Voltage Drop AV 2 = I2 *Z7 14
= (0.0042 L00 A) * (0.2184 L 1.630 ohms)
= 0.000917 Z 1.63° V AVI =Il+12)*7n2
= (0.1669 Z 30.22° A) * (0.0516 Z 2.360 ohms)
= 0.00861 Z 32.580 V Av10, 1 = AVI + aV2
= 0.0082 +j 0.0047
= 0.0095 Z 29.8° V The maximum calculated cable voltage drop between the potential transformer secondary terminals and degraded voltage relay is 0.0095 volts. This voltage drop does not account for any drops across the fuse and the test switch contacts. To account for these additional drops, the calculated value will be conservatively doubled or 0.02 volts.
SCE26-426 Rey. 3 {
Reference:
S0123-XXIV-7.15]