ML051530062
| ML051530062 | |
| 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: ML051530062 (48) | |
Text
Attachment L (Calculation E4C-130, ICCN C-3)
Proposed Interim Change (219.5 kV)
SONGS Units 2 and 3
Southern California Edison Company CALC NO. PAGE TOTAL NO. OF INTERIM CALCULATION E4C-130 ICON NOJ PAGES CHANGE NOTICE (ICCN)I PRELIM. CCN NO. C-3 1 47 CALCULATION CHANGE NOTICE (CCN)BASE CALO. REV. UNIT l CCN CONVERSION: CAIC. REV.
COVER-PAGE -. 1 .. ..1.O _ CON 3icco. -
SUMMARY
CHANGE CALCULATION
SUBJECT:
0 NO El YES TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KY Switchgear CALCULATION CROSS-INDEX ENGINEERING SYSTEM NUMBERIPRIMARY STATION SYSTEM I-CLASS 0 New/Updated Index Included DESIGNATOR 1804 I PBA I II
[j Exdstng Index IsComplete CONTROLLED PROGRAM OR PROGRAM/DATABASE NAME(S) VERSION/RELEASE NO.(S)
Site Programs / Procedure Impact? DATABASE ACCORDING TO D ALSO, LISTED BELOW O NO 0 YES, AR No. S0123-XXIV-5.1 ECP050500255-34 D PROGRAM E DATABASE N/A
-10 FR50.59-/72;48-ReVieW.--- -
AR No. N/A (PCN-561)
I ~~~~~~~~~~~~~~~~~~. .........
..J.
- 1. BRIEF DESCRIPTION OF ICCN/CCN:
This ICCN provides the basis for lowering the DGVS relay setpoint to achieve an acceptable Switchyard voltage of 219.5 kV as described in AR 050500255-34. 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) E:CP 050500255 - 34 Rev. 0
- 2. OTHER AFFECTED DOCUMENTS (CHECK AS APPLICABLE FOR CCN ONLY);
D YES O NO OTHER AFFECTED DOCUMENTS EXIST AND ARE IDENTIFIED ON ATTACHED FORM 26-503.
- 3. APPROVED BY: A ,) l...... ElectricalI/DEO C. B. Whittle 15-26-0 2 R ORIGINATOR (Print name/sjg'Tate) Alt'" (Signature/dat . V.
Approval requires POS T3EN64 0alon V ed: .: al Approval requires PQi, T364 Qualiflcation Verified:
Joshua Park / 5-26-05 IRE (Print name/sign/date)
Approval requires POS T3EN64 Qualiffcallon Va fled:
Iniial
- 4. CONVERSION TO CCN DATE SCE CDM-SONGS SCE26-122-1 REV.8 4/05 [
REFERENCE:
SO123-XXIV-7.15] e4c-09Lr,2s_eover.dac
CALCULATION CROSS-INDEX Calculation No. E4C-1 30 Sheet 2 of 47 INPUTS OUTPUTS Calc. rev. Those Interfacing calculations and/or documents Rosults and conclusion of the subject calculation I number and provide Input to the subjoct calculation, and If revised are used In these Interfacing calculations and/or responsible FLS may reouire rovislon of tho sublect calculation. documents. r
- 1*
Initials and date Rev.
Cale IDocument No. Calec / Document No.
No.
I E4C-090 ICONs C-128, 0-129, C- I -- 4 _______
Rev. 1 E4C-090 ICCNs C-128, C-129, C- 3 E4C-090 3 Ybs C- 128, C- 129, C- 130 and ICCN C-3 130, C-131 C-131
.4 E4C-082 2 Yes C-45, 0-46, C-47 and M-0073-061 ICCN C-12 C-48 6N0l-" E4C-098 3 Yes AR 050500255-28 DBD-SO23-TR-EQ 7 DBD-SO23-120 5 Yes ;ECPs 050500255-32, DBD-SO23-1 40 5 33,34 & 35 S023-302-2-518 0 S02-ll-11 .1A-2 4 Yes ECPs 050500255-32, CPD-302-3-35 Sheet C 0 33,34 & 35 S023-302-2-353 0 S02-11-1 1.1 B-2 4 Yes ECPs 050500255-32, 1814-AR286-M0008 0 33, 34 & 35 SO1 23-306-6-16 0 S03-ll-1 1.1A-2 4 Yes ECPs050500255-32, 181 4-AU51 9-M0003 0 33,34 & 35 90042 10 S03-11-1 1.1 B-2 5 Y~es ECPs 050500255-32, JS-1 23-1 03C 4 33, 34 & 35
- 1 30220-1 12 32220-1 10 UFSAR Section 8.3.1.1.3.13 Yes ECPs 050500255-32, 30230-1 14 33, 34&35 32230-1 9 31468 R 9
- I SCE26-424 REV.5 4/05 [
REFERENCE:
S0123-XXIV.7.161 e4ce-90._n-29Lcc1.doc
E&TS DEPARTMENT PEIM.CCN 1CCN NOJ NO. - Pace 3 of 47 UALCULAIOUN SHETI CCN CONVERSION:
I CCN NO. CCN or ECP SONGS OProject 2 & 3C act Nb. - *E4C-130 - -.
Subject:
TLU Calc for Undervoltacte Relay Circuits at Class 1E 4 KV Switchgear Sheet 3 of 47 REV ORIGINATOR DATE IRE DATE REV . ORIGINATOR DATE IRE DATE o C. B.Whire 5/16/2005 Joshua Park 5/16/2005 = = I :
1 C. B.Whitte 5/24/2005 Joshua Park 5/2412005 TABLE OF CONTENTS... -.... ._ -........
- _ -.-..........
1 PurPOSE ..............................
1.1 Purpose.5 1.2 Degree of Accuracy.6 1.3 Margin of Safety....6 2 RESULTS/CONCLUSIONS & REQ IREM
................................................... TS 2.1 Results/Conclusions ...................................... ... 8 2.2 Requirements.10 3 ASSUMPTIONS . ...........
_._.;. . .- .... ._ 12 3.1 Assumptions Which DO NOT Require Verification .12 3.2 Assumptions Requiring Verification .15 4 DESIGN INPU.TS..................... ........................ ......................................................................................... 16 4.1 General ..... 1 4.2 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 ..... 1 4.7 Technical Specifications Allowable Values . . . . . 18 4.8 Analysis Limi............18 4.9 PT Burdens .... 19 5 METHODOLOGY ......... ....................... ....... . . . .................................................................... 20 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 (AV) ...... 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 ...... 23 6 REFERENCES ......... __._. _. _ . __........
... . ...... 24 6.1 SONGS Calculations .... 24 6.2 Industry Publication and Standards . . . . . 24 6.3 SONGS Documents and Procedures . . . . . 24 6.4 Drawings .... 25 6.5 Vendor documents .... 25 6.6 Miscellaneous .... 26 7 NOMENCLATURE ..................... 27 00 R'A T CT ATr A
s UAIt L trTfNT
%n 1 . . ................. .. . .. . ...... .* ......................
on W,
SCE26-426 Rev. 3 Reference S0123-XX1V-7.15]
ICCN NO./
E&TS DEPARTMENT 1 PRELIM. CCN NO. C-3 IPaIo4of47 CALCULATION SHEET Project or ECP:- SONGS 2 &3 . CalcNo: E4C-130.
CCN CONVERSION:
CCN NO. CCN I.
h
- UUJO=I.
TIII
- Iu Wa nIr fnr 6
II, f r£ Dalet R irfriitc nt IInac --t. Ea KV S1witephngir Sheef 4 of 47 REV ORIGINATORJ DATE IRE DATE REV ORIGINATOR DATE IRE DATEP o C. B3.Wvh hles 5/1 6/,2005 Joshua Park 5/1 612005 _.W 1 C.B.Whitte 5/24/2005 Joshua Park 5/24/2005
...Caicplation of Primry Element Allowance (PEA) ....................................... 29 8.2 Calculation of Undervoltage Relay Total Loop Uncertainty (L ) .;;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 . ....... .................... . __ .... .. .***... 37 9.1 Potential Transformer Data Tag .............................................. 37 9.2 Westinghouse V-2 Transducer Data Sheet . 38 9.3 Correspondence with ABB Engineering Concerning Type 27N Relay .......................................... !...,.,.,,39 9.4 Correspondence with GE Confirming Potential Transformer Model Number Change ............................. 41
.9.5 Degraded Voltage Relay Cable Voltage Drop Calculation ......................................................... 42 SCE26-426 Rev. 3 fReferece: SO] 23-XXIV-7.15]
I ICCN NO./ l E&TS DEPARTMENT PRELIM. CCN NO. C-3 of 47 --Pae I
CALCULATION SHEET CCN CONVERSION:
- l CCN NO. CCN
-Prbject-or ECP: SONGS 2 & 3 Calc No. E4C-130 -. -
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Swltchgear Sheet 5 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l 0 C.S. While 62005 Joshua Park S11/ 5 in C. B. White 24/2005 Joshua Park 5/4/2)005
. .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. This is an Interim change based on Input calculations which support operability of the 230 kVSwitchyardat219.5kV. 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) Setpoints, C. Determine the As-Found and As-Left test criteria for the PU and DO, D. Determinethe New Technical Specification Allowable Values for PCN-561, E. Verify that the PU Setpoints protect the Pickup Upper Analysis Limits at the 4kV level.
F. Apply the TLU to the nominal setpoints to determine the Minimum and Maximum PU and DO.
values relative to the 4kV Bus Voltage, for use In further analysis required to ensure operability of the preferred offsite source (see Section 1.1.2).
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 setpoints 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-1990's, Southern California Edison installed a degraded voltage protection system to ensure San Onofre Nuclear Generating Station (SONGS) separates from offshte 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.
A SCE 26-426~ Rev. 3 IRcference: 50123-XXIV-7.15]
ICCN NO.1 E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 6 of 47 CALCULATION SHEET CCNCONVERSION:
l 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 6 of 47 I REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE l IRE lDATE 0 C.B.Whlttie 5/16/2005 Joshua Park 5116/2005 i:i 1 C. B. Whftle 5124/2005 Joshua Park 524/2005
-. _. . . . *.-.-... .- . . -.. -I..-
1.1.2 Approach 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-123-103C (Reference 6.3.7).
This calculation seeks to minimize the possibility of unnecessarily dropping the 1E Buses 1.
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 Pickup Setpoints will be calculated by applying SONGS standardmethodology for determining setpoints in JS-123-103C. The Allowable Value Tolerance (AVT will be applied to determine a NEW maximum PUvoltage, which will require a change to the SONGS Technical Specifications (Reference 6.3.2). The results will be consistent with the SONGS standard methodology and includes conservatism (margin). The Analysis Limit for the PU setpolnt comes from electrical calculation E4C-082 (Reference 6.1.4).
3.) The Dropout Setpoints will be determined by applying a fixed deadband (the difference between the relay pickup and dropout) to the Pickup Setpoint. These results will be consistent with the standard methodology. The Allowable Value Tolerance (AVT) will be appliedto determine a NEW minimum DO voltage, which will require a change to the SONGS TechnicalSpecifications (Reference 6.3.2). The Upper and Lower DropoutAnalysis Limits and Margins at the 4kV Buses and the 230 kV Switchyard will be determined by E4C-082 and E4C-090 (References 6.1.3 and 6.1.4), based on Input from this calculation.
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 SetpointlLoop 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.
I 1.3 Margin of Safety SCE 26-426 Rev. 3 lReferenor. SO]23-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 7 of 47 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN I Project or ECP:
cht-tnd =Jcd_,._
TI SONGS 2'&'3 - '
II Pair:fnr I IndprunItnno Rolav Clrcrmlt-z CaIc No. - E4C3 at-Clann 1E 4__-KV Switnhaaar Sheet 7 of 47 I
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B.Whittle 5/15/2005 Joshua Park 5/15/2005 =i 1 C. B.White 5W24/2005 Joshua Park MOMS
. a.....h.Is establist fafey two primary sources of conservatism Included In this calculation. They are the Miscellaneous A1lo6ance (see S-ctinf-3'.7S1 0)andth-e-appliedMargin. - -
(see Table 2.1.4 andAssumption 3.1.17). An additional area of conservatism Is the application of a 1 0 % uncertainty to the calculated burden, used for the Ratio Correction Factor (RCF) uncertainty calculation, as described In assumption 3.1.12.
SCE 26-426 Rev. 3 IlReferenc:: S0123-XXIV-7.15]
NON N REICCN E&TS DEPARTMENT PRELIM. CCN NO. C-3 l Pace 8 of 477 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. E4C-130.
uibhict- TLU Cain for Undervoltace Relav Circuits at Class I E 4 KV Switchaear Sheet 8 of 47 REV QR!G!NATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l 0 C. B.Whittle 5116120051 Joshua Park 6116/2005 . _ _ . . . E 1 C.B. Whittle 5/24/2005 Joshua Park 5t24120)05 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 TLUA Tolerance Location 2A0421 127D-1, 2,3, 4 2A0617 127D-1, 2, 3, 4 +/-0.48 Vac +/-0.16 Vac ESF SWGR 3A0420 127D-1, 2, 3, 4 (*0.4 %) (0.12) SSWroom I1 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) (+/-ti0.10 Vac)
Dropout 118.93 Vac 118.77to 119.09 Vac 118.83 to 119.03 Vac I Pickup 119.23 Vac 119.07to 119.39 Vac 179.13 to 119.33 Vac I 2.1.3 Calculated Allowable Values and RevisedTechnical Specification Allowable Values Table 2.1.3 provides a comparison of the calculated allowable values and the Revised I Technical Specification Allowable Values at the 4 kV Bus Level.
SCE 26-426 Rev. 3 {Referem=e 5OIZ3.XXIV-7.I5J
ICCN NOI E&TS DEPARTMENT PRELIM. CCN NO. C-3 l Pace 9 of 47 J CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. E4C-1 30°
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Swltchgear Sheet 9 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE =
O C,B.Whittl 6116/2005 Joshua Park 51t6/2005 _ I ... _
1 C.B.Whittle 5124/2005 Joshua Park 51242005 I~~a ble- .12.~3.-.-- - ......... - 4+1.-I 127D RelaysCurnTehia 2A0421 127D-1, 12, 2D alulaedSpecification 3, 4Pelys Calculated CurnTehia Revised Technical 2A0617127D-1, 2, 3, 4 Allowable Values Allowable Specification 3A0420 127D-1, 2, 3, 4 (Section 8.5.1) (Section 4.7) 3A0617 127D-1, 2, 3, 4 Maximum AV PU 4172.8 5 4281 V S 4172.8 Minimum AVDO 4151.0 4196 V Ž4151.0 2.1.4 PUSetpoint, TLU, Margin and Analysis Limits at the 4kV level. I Table 2.1.4 demonstrates that the calculated PUsetpoint protects the Upper Analysis, with a positive margin at the 4kV Level.
Relay Pickup Setpont 4167.3 L Table 2.1.4 TLU 16.7 Margin 6
Analysis Limit 4190 I .1 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 PU 4183.9 119.71 (Nominal PU + TLU) 4~9197 I Maximum DO41341.1 (Nominal DO + TLU) 4173.4 119.41 I Nominal PU 4167.3 119.23 I Nominal DO 4156.5 118.93 I Nominal PU -TLU 4150.2 118.75 I Minimum DO _ _ _ 118.45 (Nominal DO TLU) 4139 eI 1 18.45 I Note: All values are InVac. Numbers do not exactly match table 2.1.4 due to conservative rounding of results.
SCE 26426 Rev. 3 lRefereice: S0]23-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PREUM. CCN NO. C-3 Pace 10 of 47 CALCULATION SHEET CCN CONVERSION:
lCCN NO. CCN' Project or ECP: SONGS 2 & 3 Calc No. 240-130 -.
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switch-gear Sheet 10 of 47
-EV o
1 ORIGINATOR C. B.Whte C. B.Whttle DATE 5/16/2005 524/2005 IRE Joshua Park Joshua Park DATE 5/161200 5; 5/24/2005_
REV J
ORIGINATOR DATE IRE DATE 2 -- Requirements- - _ _ .. _ _
2.2.1 Revise Degraded Voltage System Surveillance Procedures (Reference 6.3.8, and any others affected; Maintenance to Identify.) as follows:
I 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 +/- 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 + 9F1 per Assumption 3.1.3).
- 4. Resolution Is 100 VVac 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 FO 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 surveillances to require that the calibration room temperature be recorded.
The Implementation of this requirement will be tracked by ECPs 050500255-32, 33, 34 &
35.
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 determine 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 SCE 26-426 Rev. 3 i
Reference:
S0123-XXIV-7.15]
I ICCN NOJ I I E&TS DEPARTMENT PRELIM. CCN NO. C-3 l Pane 11 of 47 CALCULATION SHEET CON CONVERSION:
lCCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchtear Sheet 11 of 47 REV OptGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B.Wh ,e 516/2005 Joshua Park 5(16/2005 1 C. B.Whitte 5/24/2005 Joshua Park 5/24/2005 _
-- Calculation -E4C.098(Reference_6.1ijs Io~be reyjsz*0to, eliminate dupli cation of this 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-SO23-120 (Reference 6.3.4) must be evaluated for changes due to this calculation..
The Implementation of this requirement will be tracked by ECPs 050500255-32,33,34&
35.
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 050500255-32,33,34&
35.
2.2.6 Perform Further Analysis to Ensure Upper and Lower Analytical Limits are Protected.
The Dropout Setpoints were determined by applying a fixed deadband (the difference between the relay Pickup and dropout) to the Dropout Setpoint. The Lower Dropout Analysis Limit, the Upper DropoutAnalysis Limit, the availableMargins and the voltages at the 230 kV Switchyard, will be determinedby E4C-090 (Reference 6.1.3),
based on Input (Table 2.1.5) from this calculation.
This will be accomplished by ICCNs C-128, C-129, C-130 & C-131 to E4C-090 2.2.7 Evaluate the UV Relays for Inclusion Inthe Out-Of-Tolerance Notification Program 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 (
Reference:
S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-3 I Pam 12 of CALCULATIUN SHElE - CCN CONVERSION:
I CCN NO. CCN Prolect or ECP:- SONGS 2 & 3 Calc No. E4C-130 -
Subject:
TLU Calc for Undervoltage Relay Circuits at Class IE 4 KV Swltchgear Sheet 12 of 47
_ ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE c o C.B. Whtte 15/16/2005 Joshua Park 5/16/2001s_
C. B.WhIftle 151242005 Joshua Park 5/2412005 ASSUMPTIONS.
3.1 Assumptions Which DO NOT Require Verification 3.1.1 Assumed Setpolnt (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 119 Vac. Therefore, 119 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/(119+0.75)-(0.11119))*100% and +Error = ((0.1/(119-0.75)-(0.1/11$)*100%, which is +/-0.000530/o This is less thanthe 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 SF (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 FQ 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 in the temperature effect, per JS-123-1 03C 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 {Referenc=: S0123-XXKJ-7.151
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO.
ICON NJ C-3P20e Pa. 13 of47 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN lProjedt or ECP: SONGS 2 & 3 Calc No. E4C-130 . .
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchgear Sheet 13 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C C.B.Whittle 5116/2005 Joshua Park 5116/2005 _2 C. B.White 5/24/2005 Joshua Park 5/24/2005
_.S.1.6_Radiatipn..Eftect1Re) -.-........ . ____..._ . . -.
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 undervoltage 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 ANSlIIEEE 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 "at the Engineer's discretions. 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-7.15]
E&TS DEPARTMENT A -......_
[ PRELIM.
I ICCN NOJ CCN NO. C-3 I Pace 14 of 47 I
_ _ . - . _ =. _ -.
CALCULATION SHEET CCNCONVERSION:
CCN NO. CCIN Project or ECP: SONGS 2 & 3 Calc No. E4C-130
Subject:
TLLU Calc for Undervoltale Relay Circuits at Class 1E 4 KV Switchgear Sheet 14 of 47 REV OINATOR DATE IRE DATE REV ORIGIN'ATOR DATE WIE DATE cc o C.B.WhPie 5/16/20051 Joshua Park 5/16/20051 _i Em 1 C. B. Whittle /24120051 Joshua Park 51M412005 . z 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)AO6 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, SA04 and 3A06) Isbeing 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 Ifthe 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 InAttachment 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.
SCB 26-426 Rev. 3 l
Reference:
S0123-XXIV-7.15)
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Paoe 15 of 47
- . *.H - . a _.. a. .__
CALUULA I UN SHEEI CON CONVERSION:
CCN NO. CCN Project or ECP. SONGS 2 & 3 Calc No. E4C-1 30
Subject:
TLU Caic for Undervoltage RelaV Circuits at Class 1E 4 KV Swltchgear Sheet 15 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C.S. Whittle 5/16/2005 Joshua Park 5/16/2005 j C. B. WhtUe 5/24/2005 Joshua Park 5/24/2005
_.3.11.16. ....Confide~nco .lDt~er v~al 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 Pickup setpoint. This Margin is based on engineering judgment and was chosen based the value being close to the Allowable Value Tolerance (see Section 8.3).
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 26.426 Rev. 3 {Refeencc: S0123-XXIV-7.15]
ICCN NO./
E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace IS of47 CALCULATION SHEET CCN CONVERSION:
ICN NO. CCN I
- - Project or ECP: SONGS 2 & 3 Calc No. E4C-130 subiett: TLU Calc for Undervoltaue Relav Circuits at Class 1E 4 KV Switchaear Sheet 16 of 47 EV DATE IRE DAREV TOR DIRE DATEI_
0 C. B.WhItUe 511612005 Joshua Park 5/18/2005 c C-)
C. B.While 4/2005 Joshua Park 5/24/2005
-A DFSIGSGNJNrTS . . .
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.
.. L. cation o*
Function .- _._*. . ... _._ __ ;
- Bus 2A04 Bus 2AO06 Bus 3A04 j Bus 3AO6 Cubicle 21 17 20 17 Undervoltage Relay ID 2A0421 2A0617 3A0420 , 3A0617 Numbers 127D-1. 2,3,4 127-1, 2. 3, 4. 127D-1, 2,3,4 127D-1, 2,3.4 42 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: 100-1 40 V DC Temperature range: -30 to +700 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 (100-140V) -*0.1%
- c. Temp. Range: 0 to +55° C - *O.75%
+10 to +40 0C - *0.4%
-2010 +700 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 26-426 Rev. 3 I
Reference:
S01 23-,XXIV.7.J5]
E&TS DEPARTMENT PRELCM CONJO ICORLIM CNON.J- - Pace 17 of 4 CALCULATION SHEET
... ro-jector,ECP: SONGS 2 & 3 Calc No. "E40-130 "
ICCN CONVERSION:
I CON NO. CCN
.1
'17...,J
[InaI I^t,fj~w I In rnInaDeisnh, tPIr,.,ile of M~aee 'It A W11 Qei*ffrhtwen .qhpt 17 nf A7 13VORIGINATOR_ DATE I IRE DATE JREV ORIGiNATrOR DA~TE IRE DATE 0 C.B.Wh~tte t5~/20MOO Joshua Park 5/116MOOS I C.8B. Whittle 5/24/20051 Joshua Park 5/4/2005 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: Genera! Electric Model: JVM-3 Thermal Rating:750VA Style: Old No.: 643X094000 New No.: 763X021 026 (See Attachment 9.4 for confirmation)
Accuracy. 0.3 W, X, M, Y, 1.2 Z burden @60Hz PT Tag Data (Attachment 9.1):
IROEF Burden IAngle IPower Factor VA Minutes No Load i0.9974 10 i 11.00 11.0019 75 -2 0.85 4.4 Environmental Condition Data FORM 4: ENVIRONMENTAL CONDITIONS DATA SHEET AREA: 0B Area B5 (ESF SWGR room) Mild Environment (Reference 6.3.5.)
Parameter Data Heference Normal Temperature 550F 6.1.1 Minimum, DF Normal Temperature 81 .7OF 6.1.1 Maximum, OF Normal Radiation < 1.0 E4 Rads 6.3.5 Value, gamma Pads Normal Pressure 0 Psig 6.3.5 Minimum, psig Normal Pressure 0 psig 6.3.5 Maximum, psig Accident Temperature 0 95OF 6.3.5 Maximum, F Accident Radiation <~ 1.0 E4 Rads 6.3.5 Value, Rads gamma Accident Relative 80 6.3.5 Humidity Range % RH 0 psig 6.3.5 Maximum, psig SCE26-426 Rev. 3 (Referenlce: SO)23-XXIV.7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Paae 18 of 47 CALCULATION SHEET i CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 CaIc No. E4C-130
Subject:
TLU Calc for Undervoltace Relay Circuits at Class I E 4 KV Switchgear Sheet 18 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C. B.Whittle 511612005 Joshua Park 6116/2005 C. B. Whittle 5/2412005 Joshua Park 5/2412005
_ _ 4. M E Used for Setpoint Measurement and Adjustment (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 C0of the last ACAL (See note):
+/-(0.001% of Reading + 0.0001 % Range)/C0 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 C", but within +/- 5 C0 of the last ACAL (See note):
+/-(0.001% of Reading + 0.0001 % Range)lCO Resolution: 100 ,uVac 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 The Upper (Maximum) Analysis Limit for the Undervoltage Relay Pickup established by Calculation E4C-090 (Reference 6.1.3) is:
AL (Pickup) = 4190 Vac at the 4kVBus SCE 26-426 Rev. 3 {
Reference:
S0123-XXIV-7.15]
PICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3-- Paroe 19 of 4 CALCULATION SHEET I CCN CONVERSION:
CCN NO. CCN I I
Prolect or ECP: SONGS 2 & 3 Calc N6. E4C-130 Subbect: TLU CalC for Undervoltaqe RelaV Circuits at Class 1E 4 KV Switchqear Sheet 19 of 47 REV ORIGINATOR DATE IRE DATE ORIGINATOR DATE IRE DATE 0 C. B.Wiitte -51i6/2005 Joshua Park 5S16/2005 _
C. B. Whittle lS24/2005 Joshua Park 5/24/2005 2
- 4. .9.1.IndividualCompone.tBurd.ns 4.9.1 Individual ComponeOnt Burdens Load Type Vendors Stated Load Burden Reference Undervoltage relays 0.5 VA (Solid State) 0.5 +J0 VA 6.5.1 12710-1, 2,3,4 6.5.4 127F1, 2,3,4 (CV-2) 2.4 VA 0 .29 pf 0.70 + J2.30 VA (Tap set at I 05 Vac per 6.3.1) 127R1, 2 3,4 (SVF) 17VA 0 2P iLagging 15.15+p7.72VA 6.5.6 Hathaway Digital Fault 50 k Ohms 0.288 + JO VA 6.5.7 Page 1-21 Recorder (DFA) _______
TDV and TDVI 0.2 VA 0.2 + J0 VA 9.2 Not In circuit Synchroscope Circuit N/A OVA per assumption e O3.1.14 4.9.2 Burdens On Each Transformer (2A04, 2-A06, 3A04, 3A06):
Transformer Attached Devices Reference (Burdens) 1271-3 Undervoltage Circuit 1 127F3 6.4.1 PT a-b 127R3.
TDV Undervoltage Circuit 1 127i-4 PT b-c 127F4 6.4.1
~127 P~~~b~~~c 1R4 _ _ _ _ _ _ _ _ _ _ _ _
1Z7D-1 Undervoitago Circuit 2 127F1 Pab127R1 6.4.1 P~a-bTOVI DFR 127D-2 6.4.1 Undervoltage Circuit 2 127F26.1 PT b1712 (Synchrosco) 127R2 (Synchroscope Is Not assumption In circuit per 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.
SCE 26-426 Rev. 3 {Refcrcicm S0123-XXIV.7.15]
ICCN NOJ E&TS DEPARTMENT I PRELIM. CCN NO. C-3 Pace 20 of 47 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN _
I Project or ECP: SONGS 2 & 3 Calc No; E4C-130 Ti II E inI.
fg lnn nrsntntlFna Dnv ttr,.mllfe Mt niftee It A BVI Quisrlhrnbr sqhtck 9n nf A7
,EV ORIGINATOR DA-TE IRE DATE REV ORIGINATOR DATE IRE DATE O0 C. B. Whittle 5/1512005 Joshua Park 5/16/20051 C. B. Whittle 5124/2005 Joshua Park 5/2412005' 5_ METHODOLOGY Overview: This methodology is consistent with the requirements of SONGS JS-123-1030 (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 froni that of the Pickup setpoint.
The Pickup setpolnt Is determinedusing the standardsetpointmethodology of JS-123-103C (Reference 6.3.7) I The calculation of the Dropout setpolnt Is based strictly on applying the minimum acceptable Deadband to the Pickup setpoint In order to minimize the voltage required to ensure reset of the I relays (as discussed above).
The minimum and maximum trip (setpoint *TLU) is calculated for both the Pickup and Dropout.
This Is done because these values are used as Input to other calculations which establish the margins and the Analytical Limit for the Pickup setting and the 230kV switchyard voltage requirements.
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.
SCE264Z2 Rev. 3 (Kelerence: 50123-XXIV-7.151
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C,3 IPaae 21 of 4 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN .1i Project or ECP: SONGS 2 & 3 Caic No. E4C-130 c~im . Ti I I rnain fMr I IndprvnItsno Ralav (Cirrtiltsat Clans IF 4 KV Swltchaear Sheet 21 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IREDAM O C ".B.Whitge ' 5/11005 Joshua Park 51 6/2005O C. B.WhItte 5/24/2005 Joshua Park 5/24/2005 EquatioFn5-1 - --..--... -
RCF, =RCFI + [B,_[(RCF,- RCFO)xcos(O, -O0) + (r, - ro)xsin(9,- O)]
Where, Bo =the zero burden for which RCF and y are known, B. = a burden for which ROF and yare known, B,= the burden for which RCF Is to be calculated, Ot and E, = power factor angles of burdens Bt and Bc, respectively (in radians)
RCFO, RCF, and RCFC = transformer ratio correction factors for burdens Bo, B,, and B,, respectively, Yb 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 RCF 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 In the 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 PEADUrd-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 PEApr.
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 PEAvD.
5.2 Calculation of Undervoltage Relay Total Loop Uncertainty (TLU)
SCE26-426Rev. 3 i
Reference:
S0123-.XXv-7.J]
lICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-3 1Pace 22 of 47 CALCULATION SHEET CCN CONVERSION:
.I CCN NO. CCNI Project or ECP: SONGS 2 & 3 Cdlc No.- E4C-130 - - -, -, - - - .. .... ,"
,,thlTa- TI 11 Care for I IneicrkmnInnan Rplnv (ireutits nt C`.Inko I EI KV Swlttcharear Sheet 22 of 47 REV ORIGINATOR C. B.Whie DATE 5/16/2005 IRE Joshua Park DATE 5/16/2005 REV ORIGINATOR DATE IRE DATE T C. B. Whitfe 5/24/2005 Joshua Park 5/24/2005 5.2.1 The followi.ng uncertainties are considered for Inclusion per JS-123-103C (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)
MTERs Is +/-25% of M&TE accuracy per JS-123-1 03C (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 in TLU per JS-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 In the determination of the TLU and the biases (PEA In this case) are added. Therefore:
TLU=+ Te-2 D 2 +PSe2 + Se2 +Re 2 + MTE2 + ST 2 +Ma2 + PEA4 2 +/- pEABUD +/-pE4 5.3 Calculation of Undervoltage Relay Allowable Value Tolerance (AVT)
The allowable value (AV) will be calculated per JS-123-103C (Reference 6.3.7) section 4.4 from the equation:
SCE 26-426 Rev. 3 {Refeencc: S0123-XXIV-7.15]
ICCN NO .
E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 23 of 47 CALCULATION SHEET IN CONVERSION:
I CCN NO. CCN Project orFECP: SONGS 2 & 3 Calc No. - E4C-130 -
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchgear Sheet 23 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE c O C.B. Whittle 5/1162005 Joshua Park o51s . . . 2 I C.B.Whittle 5/2412005 Joshua Park 5/24/2005 Where D isthe 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 CalculatIon of Relay Pickup (PU) Seipoint (SPpu)
The undervoltage relay Pickup setpoint Is a Increasing setpoint as defined in JS-123-103C (Reference 6.3.7) section 4.7.
SP (Increasing) = ALU + (-TLU) - M Where ALuIs the upper Analysis Umit (see Section 4.8), M is the margin and (+TLU)
Is the positive TLU.
5.4.2 Calculation of Relay Dropout Setpoint SPDO The Dropout Setpoints will be determined by applying a set deadband (DB = the difference between the relay pickup and dropout) to the PU Setpoint (SPpu).
Therefore:
SPDo = SPpU - DB 5.5 Calculation of Undervoltage Relay PU and DO As-Found/As-Left Acceptance Bands 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 TLU to the setpoint (SP). This yields the following equations:
Maximum = SP + (+TLU)
Minimum = SP + (-TLU)
SCE 26426 Rev. 3 (
Reference:
S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CON NO. C-3 Paae 24 of 47 CALCULATION SHEET _1CCN CONVERSION:
CON NO. CCN Proiect or ECP: SONGS 2 & 3 CalcNo. E4C-130
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switch ear Sheet 24 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE O C. B, WhittJe 5/16/2005 Joshua Park 6105
=
I C. B. Whftde 5/24/2005 Joshua Park 5/2005 6 REFERENCES - _ .
6.1 SONGS Calculations 6.1.1 M-0073-061 ICCN C-1 2 - 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 ICCN C-128 - Analysis for Bus 2A04 6.1.3.2 ICCN C-129-Analysis forBus 2AO6 6.1.3.3 ICCN C-130 -Analysis for Bus 3A04 6.1.3.4 ICCN 0-131 - Analysis for Bus 3A06 6.1.4 E4C-082 Revision 2 - System Dynamic Voltages During DBA 6.1.4.1 ICCN C Analysis for Bus 2A04 6.1.4.2 ICCN C Analysis for Bus 2A06 6.1.4.3 ICCN C Analysis for Bus 3A04 6.1.4.4 ICCN C-48 -Analysis forBus 3A06 6.1.5 J-ZZZ-069 Revision O-Out-Of-Tolerance Notification Program (OTN) 62 Industry Publication and Standards 6.2.1 NRC Regulatory Guide 1.105 Revision 3 Setpoints For Safety-Related Instrumentation 6.2.2 ANSVIEEE 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.
6.32 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 I E 125 Vdc System 6.3.7 SCE Standard JS-123-103C Revision 4 - Instrument SetpointVLoop Accuracy Calculation Methodology SCE 26-426 Rev. 3 i Referen~e: 50123-XXIV-7.15J
ICCN NOJ -
E&TS DEPARTMENT I PRELIM. CCN NO. C-3 l Paae 25 of 47 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN I Pr6ject or ECP: SONGS 2 & 3 Calc No. E4C-130 . ..
TIl 11 nft g*uuj*t;*V.
m-W fr IIralinhiftarwav.
tnvis
- 1-
..... _u V
w Vir.iuitc
.. - ta7
- I"Itnec 4S fl4.
1F A KV VXI v _ .*
- uitc-hionr Shneet 25 nf A7 ORIGIN DATE IRE DATE REV ORIGINATOR DATE IRE DATE l
-0 C. S. Whtle 5/16/2005 Joshua Park 511612005 2 = I I 1 C.B.Whtte 5/24/2005 Joshua Park 5/24/2005
_ _ 6.3.8 Surveillance Test Procedures for Loss of Voltage (LOVS), Degraded Voltage (SDVS, DGVSS) and Seu evisionlay adClr-cuits 2.E.F Tra.n.
S02-l1-1 1.1A-2 Revision 4 - S.R. Unit 2 ESF Train A S02-ll-1 1.1 8-2 Revision 4 - S.R. Unit 2 ESF Train B S03-ll-11.1A-2 Revision 4 - S.R. Unit 3 ESF Train A SO3-ll-11.1 B-2 Revision 5 - S.R. Unit 3 ESF Train B 6.4 Drawings.
6.4.1 Elementary Drawings Unit 2 _ Unit 3 No. Rev. 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 S023-302-2-51 8 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 0 - ABB Type SVF, SVF-1, SVF-3, SVF-31 Relays 6.5.7 S0123-306-6-16 Revision 0 - Volume 1 ibigital Fault Recorder for Southern California Edison 6.5.8 1814-AU519-M0003 Revision 0-Agilent (HP) 3458A Multimeter Specifications SCEZ6426 Rev. 3 iRcferencc: SO1 23-XXIV-7.15]
ICCN NO.I E&TS DEPARTMENT PRELIM. CCN NO. C-3 Paae 26 of 47 CALCULATION SHEET l CcN CONVERSION:
I CCN NO. CCN I Prdject orECP. - SONGS 2 &-3 - Calc No. - -E4C-130 -
R,,htt Til Clp-fnr IInrlenrnIt~nr Relav ClIrcuits at Ca IF 4 KV Rwltthnear Sheet 26 of 47 EV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B.Whittle 5/16/2005 Joshua Park 5/1612005 C. B. Whiffle 5/24/2005 JQshua Park 5124/2005 6.6 Miscellaneous 6.6.1 Action Request AR050301091-65 6.6.2 SONGS Licensee Event Report No. 2005-003.
I SCE 26426 Rev. 3 {
Reference:
S0123-XXlV-7.15]
ICCN NOJ E&TS DEPARTMENT IPRELIM. CCN NO. C-3 IPace 27 of 4 CALCULATION SHEET CCN CONVERSION:
ICCN NO. C-CN -I__
at.hipmt TI tlire fnr lUnr1rvnitame Relav rirricuiti aC nlasIF A KV Swittchnaer Sheet 27 of 47 REVATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.B.White 5/16/2005 Joshua Park 5116/2005_l 1 C. B.WhIftle 6/24/2005 Joshua Park 5/24/2005 The following are In addition to the nomenclature of JS-1 23-1 03C (Reference 6.3.7).
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 TransformerNoltage Transformer PU Pickup SDVS Sustained Degraded Voltage Signal SCE 26-426 Rev. 3 fReferencc: S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. CN I PaOe 28 of 47 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN I Project orECP: SONGS 2 &3 E4C-130 - - -
C.iHe~im OU-]- TLII
. -- vIIa-efnr
- In r runvtna-x
~.v--- Rea-IvrCirrcuilts i
. -.- -
- ntl Clas
-- v 1E_ 4 KV SwItchaear
_ . _- Sheet 28 of 47 I
REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE i O C. B.Whlttle 6/161200S Joshua Park 5/16J2005 _ I . . I 1 C. B. Whittle 5/2412005 Joshua Park 5124/2005 _
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 VL,, Line to Line Voltage VL.N Line to Neutral Voltage VT Voltage Tap Setting x Reactance SCE26-426 Rev. 3 {Refcrence S0123-XXIV-7.15]
lEICCN NOJ E&TS DEPARTMENT IPRIELIM. CCN NO. C-3 IPace 29 of 4 CALCULATION SHEET CCN CONVERSION:
CON NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. - E4C-130 - - - -- . - -
.q,hickt* TLII rlah- fnr I-ndinrvoltati Ralav nircults at Class III 4 KV Swltchaear Sheet 29 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE O C.B.Whittle 5/1612005 Joshua Park 5/16/2005 C. B. Whittle 5124/2005 Joshua Park 5/24/2005 __2
-8CALCWATrfNS.. _ ._
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 Rs 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 BTDv + B1 7D 0 3 + B127F 3 + B127R3 Where (from table 4.9.1):
= 0.2 + JO VA B127F,3 = 0.5 + JO VA
= 0.7 + j2.3 VA B127Ft - 15.15+ j7.72VA Sum-- BAB = 16.55 + 10.02 VA = 19.35 L 31 ,2 2 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 Calculatod Burden DiWference From the Average PT Transformer
_ R + JX (VA) Z (VA) L Angle (c) %
Undervoltage Circuit 1 Ba-b 16.55 +j10.02 19.35 L31.2 -0.16 Undervoltage CIrcuit 1 Bb-c 16.35 + J1 0.02 19.18 L31.5 +0.72 Undervoltage Circuit 2 Ba-b 16.83 + J1 0.02 19.58 L30.8 -1.4 Undervoltage Circuit 2 Bb-c 16.35 + J10.02 19.18 L 31.5 +0.72 Average PT Burden 16.52 + 110.02 19.32 L31.2 N/A Minimum per assumption 3.1.12 (-10 *%/) 14.87 + J9.02 17.39 L31.2 -1.93 (-1 0%)
Maximum per assumption 3.1.12 (+10 %) 18.17 +1J11.02 21.25 L-31.2 +1.93 (+110%1/)
Therefore, per assumption 3.1.12 the PT burden for all PTs will be 19.32 L31.2 (+/- 10%).
SCE 26426 Rev. 3 {Rereae: SOI23-XXIV-7.15]
lICCN NO.N N E&TS DEPARTMENT IPRzELIM. CCN NO. C-3 Pae 30 of 47 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN -
I Project or ECP: SONGS 2 & 3
- Calc No. -E4C-130" Subiect: TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Switchqear Sheet 30 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C.
S.Whhtle 5/1I/2005 Joshua Park 5/16/2005 ' I C. B.White 5/24/2005 Joshua Park 5/24/2005
.1 8.1.2 Calculation of the PT-atio C6rrectlo-n-Facor a-na curacy . z 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 RCF, = RCIG +EtL}(RCF, -RCFO)xcos(O, -b)+(r, -yo)xsingO -be)]
The following Is an example of RCF Calculation for the average PT Burden:
RCF = 0.9974 +[ __
2x...
[(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) = 31.79° = 0.5548 radians (Section 4.3, Y Burden) ec = = 31.2° = 0.5445 radians (Table 8.1.1)
RCFO = 0.9974 (Section 4.3, No Burden)
RCF 1= 1.0019 (Section 4.3, Y Burden)
Br = 19.32 VA (Table 8.1.1)
Bt = 75 VA (Section 4.3, Y Burden) yo= +1 minute = 0.000291 radians (Section 4.3, No Burden) yA = -2 minutes = -0.000582 radians (Section 4.3, Y Burden)
RCF values were similarly calculated for the minimum and maximum burdens (as calculated in the previous section). The results, including percent error from the average RCF, are summarized in the following table:
SCE 26-426 Rev. 3 {Reference S0123-XXIV-7.15]
IICCN NOi E&TS DEPARTMENT PRELIM.ICONNOJ CCN NO. C-3 Pae 31 of aoe~of.
CALC.ULAT IUN SiHEET CCN CONVERSION:
.CCN NO. CCN Project br ECP: SONGS 2 & 3 Calc No. E4C-130. .
Subject:
TLU Calc for Undervoltaje Relay Circuits at Class lE 4 KV Switchgear Sheet 31 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE c 0 - C. B.Whittle 5/16/2005 Joshua Park 5/162005fi 5 C.B.Whittle 5124/2005 Joshua Park S/24/2005j
_ _ -- l. Table 8.1.2 _ _ _1 Calculated Burden CacltdRCF RCF Percent Error fromn the Average Average PT Burden 19.32 L31.20 0.99856 N/A Minimum per assumption 3.t.12 17.39 L31.20 0.99844 -0.012 %
(-10% burden)
Maximum per assumption 0.99867 +0.01 3.1.12 (+10% burden) 21.25 -31 .20 .96 2%
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:
PEAOLd =+/-0.012%
Assumption 3.1.9 specifies an additional Independent, random error of 0.05% will be applied to the PT. Therefore:
PEApT = :0.05%
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:
= - 0.02119J100 = -0.01 7%
Therefore:
-PEAVD = -0.017% (Bias) and
+PEAvD = 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)
SCE 26-426 Rev. 3 I
Reference:
S0123-XXIV-7.15]
ICCN NON N E&TS DEPARTMENT IPRELIM. CCN NO. C-3 I Paoe 32 of 4 a A a AUm M1 a Ad am A M
LALLU LAI1UN HMET I CCN CONVERSION:
I CCN NO. CCN Prbject or ECP: SONGS 2 & 3 Calc No. E4C-130 Subject; TLU Calc for Undervoltage Relay Circuits at Class lE 4 KV Switchgear Sheet 32 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE o C. B.WhHtle 5/16/2005 Joshua Park 5/1612005 C. B. WhMMe 524/2005 Joshua Park .6ftA :.
PEApurd +/-:W.012 % (Bias}_
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 manufacturers stated accuracy for allowable dc control power range from 100 tol 40 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 OF during normal conditions to a high of 95 0 F during accident conditions (Section 4.4). This temperature range Is bounding for normal conditions. Per Assumption 3.1.13 the relays will experience this same temperature difference. Therefore:
AT=95-55=40 FD The manufacturers stated temperature effect is +/- 0.4 % for a temperature range of 10 to 40 RC. Therefore the temperature effect is:
+/-0.4 / (40-10)
- 519 = +/-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=o SCE26-426 Rev. 3 {Refrcnce: S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 33 of 47 UALUULATIUN ZSHtEIE CCN CONVERSION:
I CCN NO. CCN Project or ECP- SONGS 2 & 3 Calc No. E4C-130 . -. .. . .
Subject; TLU Cale for Undervoltage RelaV Circuits at Class 1E 4 KV Switchgear Sheet 33 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE Cc o CS . Whittle 5/16/2005 Joshua Park 5/16/2005 = 2 C. S. Whittle 52412005 Joshua Park 5/24/2005 8.2.1.3 M&TEfTolerance (MTE)Y-L .
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 119 Vac point of Interest as discussed in Assumption 3.1.1.
8.2.1.3.1 M&TE Accuracy (MTEA)
The accuracy for the 1OOVac range (120 Vac maximum reading) at 40Hz to 1kHz In the Synchronous mode Is:
MTEAI20 = +(0.02% of reading + 0.002 % Range)
=+/-(0.02% + 0.002% 120171-9
= +/-0.023%
The accuracy for the 100OVac range at 40Hz to 1kHz in the Synchronous mode is:
MTEAlk = +/-(0.04% of reading + 0.002 % Range)
=+/-(0.04%+ 0.002% 1000/119)
= +/- 0.057 %
8.2.1.3.2 Readability (R) (least significant digit for digital M&TE)
R120 = +/-0.00001 Vac
= +/-0.00001 Vac/1 19 Vac* 100= +/-0.00001%
e 0 (per Assumption 3.1.11)
Rik +/-0.0001 Vac
= +/-0.0001 Vac/119Vac* 100 = +/-0.0001%
0 (per Assumption 3.1.11) 8.2.1.3.3 M&TE temperature effect (MTETQ)
Temperature Coefficient for reading outside of
- 1.8 F0 (* 1 C*) 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 ( C 00) and converting to F0 from CO:
MTET.12O= +/-(0.001 +0.0001
- 120/119)* 519*9 % =+/-0.006%
MTETOIk = +/-(0.001 + 0.0001
- 1000/119)' 519* 9 % = +/-0.010 %
8.2.1.3.4 M&TE Reference Standards (MTEn)
The reference standard accuracy is assumed to be 25% of the M&TE accuracy per JS-123-1 03C (reference 6.3.7). Therefore:
SCE 26-426 Rev. 3 (
Reference:
S01 23.XXaV-7.15j
NON IMCCN E&TS DEPARTMENT PRELIM. CCN NO. C-3 l Paae 34 of 47 CALCULATION SHEET CCN CONVERSION:
I CCN NO. CCN i Project or ECP: SONGS 2 & 3 - Calc No. E4C3.1 30-.
Subject:
TLU Calc for Undervoltace Relav Circuits at Class 1 E 4 KV Switchqear Sheet 34 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR lDATE IRE DATE O C. B.Whitte 5116/2005 Joshua Park 5/18/2005 . . i g 1 C. B. White 5/24/2005 Joshua Park 5/24120=5
I MTERsl2o - 0.023% ~
0.25i i0 0/- 1-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 + MTETe2 + MTEps2 )"t2' MTE1 20 = +/- (0.0232+ 02 + 0.0062 + 0.0062)1/2 MTE 120 = +/- 0.025%16 MTElk = +/- (0.0572 + 02 + 0.01 o2 + 0.01 52)1/2 MTElk = +/- 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 = +/-0.11119"100 = +/-0.085%1*
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:
TLJ=+/-jTe2 D2+PSe2+ Se2+e2+MTE2 +ST2 +Ma2 +pE4pr2 +/-.PEABUiiPEAY
-PEAvD = -0.01 7%
+PEAVD =0%
PEABURD = +/-0.01 2%
PEApr = +/-0.05%
Te = +/-0.297%
D =+/-0.1%
PSe = +/-0.1%
Se = N/A Re = N/A MTe = +/-0.060%
SCE 26-426 Rev. 3 {Refcrence: S0123-XXIV-7.15]
I ICCN NOJ E&TS DEPARTMENT PRELIM.
NJCCN NO, ICCN C-3 -IPaaePa. 35 47 CALCULATION SHEET l CCN CONVERSION:
ICCN NO. CCN I Projector ECP: SONGS 2 & 3 . Calc No. E4C-130 . - .-- .
Subiect: TLU Calc for Undervoltaae Relav Circuits at Class 1 E 4 KV Switchaear Sheet 35 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE cc O C. B. Whittle 5/16/2005 Joshua Park 5/16/20051i Q 1 C. B. Whittle 5/24/2005 Joshua Park 5/24/2005
_____ST = +/-0.085%__
Ma = o,.T%-
+TLU= +(0.2972 + 0.12 + 0.12 +02 40 62+0.0852+0.12+ 0.052)i + 0.012 + 0% = +0.375%
- TLU = -( 0.2972 + 0.12 + 0.12 F 62 +o2 + 0.0602 + 0.0852 + 0.12 + 0.052) % - 0.012 - 0.017% = -0.392%
Rounding conservatively to the larger TLU value:
TLU = +/-0.40% OR
= +/-0.40%
= +/-0.40%
- 119* (35
- 0.99856) = +/-16.7Vac 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 = ,DD2 + ST2 + R2 ST = Setting Tolerance: *0.085%.
D = Drift: +/-0.1%
R = Readability of M&TE: = +/-0.00001 / 119 Vac
= 0.00001 % a 0 (Negligible per 3..11)
Therefore, the Tolerance for allowable value is:
AVT =+/-().082+0.12+2)1J% =+/-0.132% OR
= +/-0.132%
=+/-t0.132%'1
- 119 ' (35
- 0.99856) = +/-5.5 Vac at the 4kV Bus 8.4 Calculation of Undervoltage Relay PU and DO Setpoints 8.4.1 Undervoltage Relay Undervoltage PU Setpoint (SPpu)
The undervoltage relay pickup, Is determined by SP (Increasing) = ALu + (-TLU) - M Where ALU = 4190
-TLU = -0.48 Vac at the Relay or 16.7 Vac at the 4kV Bus M = 6 Vacat the 4kVBus SPpu = (4190 - 16.7 - 6)1(35
- 0.99856) = 119.23 Vac at the UVRelay OR SPpu=4l9O- 16.7-6 = 4167.3 Vac at the 4kV Bus 8.4.2 Calculation of Relay DO Selpoint SPDo SCE 26-426 Rev. 3 (
Reference:
S0123-XXIV-7.15S
l ICCN NOJ l E&TS DEPARTMENT I PRELIM. CCN NO. C-3 I Paae 36 of 47 CALUULA1 IUN SHEE IT CCN CONVERSION:
ICCN NO. CCH Project or EOP: SONGS 2 & 3 CaIc No. . E4C-130.
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1E 4 KV Swltchgear Sheet 36 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l o C.B.WhitUe 5116/2005 Joshua Park 5/16=2005=
C. B. Whittle 5124/2005 Joshua Park 5/2412005 Based on the method outlined In section 5.4.2, the Relay DO Voltage Setpoint is
__ - tetninedbyaddinglhe-deadband-f 0.-3tac-(see-3;.24)-to-thef.lJSotpoint.(SPpu _ _--
), Therefore:
SPDO = SPpv - DB = 119.23 - 0.3 =118.93 Vac at the UV Relay OR SPDO = 118.93 *(35
- 0.99856) 4156.5 Vac at the 4 kVbus 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 setpolnt +/-AV (allowable value).
As-Found Band for Dropout = 118.93+/-L0.16 Vac
= 118.77to 119.09 Vac at the UV Relay OR
= 4156.5+/-5.5Vac
- 4151.0 to 4162.0 Vac at the 4kV Bus As-Found Band for Pickup = 119.23+/-0.16 Vac
_ 119.07to 119.39Vac at the UV Relay OR
= 4167.3t5.5 Vac
= 4161.8 to 4172.8 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 +/-ST (setting tolerance).
As-LeftBandforDropout= 118.93t0.1 Vac= 118.83to 119.03Vac As-LeftBandforIPIckup = 119.23*0.1 Vac= 119.13to 119.33Vac 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 = (119.23 + 0.48) = 119.71 Vac at the UV Relay OR
= (119.23 + 0.48)*(35
= (118.93 + 0.48)*(35
= (119.23- 0.48)*(35
= (118.93 - 0.48)*(35
ICCN NOI E&TS DEPARTMENT PRELIM. ICON ~d CCN NO. C-3 I Poe 37 of 4 Paae 37of CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. E4C-130
- U J'-. T1-_ II
_ rilot_ fnr F
_~l _. .-- t. NE Relav
- --- , -a~
at_-Class._ IF Circults P1nrkirunIe ,_ 4KV A_ . -, witrhapar Sheet 37 of 47 FEV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C. B. Whittle 5116/2005 Joshua Park 5116/20051 a 1E
_ C. B. Whittle 5/24/2005 Joshua Park 5/24/2005
-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.
763X0210 2 6
. Is I Type JVM-3
-r4 e nel i;ocznrVM)
~I It
&JLJJLP~~-E- 1li Ratio jtj: I C)laI ri ;vojUt utjC- .
tated Secondary Volts 120 Test Frequency sO HZ I ,
pb~ase Ang.16 winutme)
I *Secondary secondary Ratio Correction Fasctr Burden Volts 0 VA 120 0.9974 +1 il i Y 120 1.0019 -2 . .5 I
pUs.. n -. .,_
, I1/4Jfl Tssted by: DC A i SCE26-426 Rev. 3 iRefrence: S0123-XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT I PRELIM. CCN NO. C-3 Paae 38 of 47 CALCULATION SHEET CCN CONVERSION:
I I CCN NO. CCN
I
, T[IJ Calc for Undervoltaqe Relay Circuits at Class I E 4 KV Switch-ear Sheet 38 of 47
_EV ORIGINATOR DATE l IRE DATE REV ORIGINATOR DATE IRE DATE G O C.B.Whittle 5/16/2005 Joshua Park 5/162005 1 C. B.Whittle 5/24/2005 Joshua Park 5/2412005 9.2 vWestinghouse V-2 Transducer Data Sheet Applicatioafl oas 434160 P119e 30 Type V.2 Transducem Speci~Jcatioft and Tsthnk;l DOW
- 3. Type V32441 C&wrrsm Transducer (a) spocillestions Stsi~d 00u ........ ~...5 5fIM0 2pclatfP ............ S n14 Ind mwatat~s WVto 20 emvs Ouf.1........... I IrA. blsoud Load Auown".........0... l ohms *1%
LMrAlfy............al. 'ijtIvold lInsecurc~aylivi Accurecy............
- 11 II g61trnet codition ith1A1 sooun i,,
Loss..............0.2 volt amomie Wstm UJ Tbr,.......... Noog-tile Flos.'m. rww......... 0.11S seconds, msAz'.m
&A901Tafaiui~wmlvStler.. 1%maimuth for *110* change from 21T 13W'ma epit ups, kdnilanc . ... 2% 2-C toisl 2%.2 I1C to -20 Fteqwency In~omraf........*1.0 for Milmwm for *s10A change Ilk frequency Make~u(k Tail..........I Soo "t mrs WaWlvgVafto" "wGODwi..... 00 voM5 ost tP1CWi Of Agtkq) ....... CORmliwou. 200%
S s"M4410. 500%
I Batons.10loom
- 4. Type V92.341 Volta;. Transducer Some as for V12441 (Pusagfsph 3)eaxcept:
B. Type VE24SM Suppressed Zero Voltage Transducer gime "taot Vf2.54 (Pnateuph 3) *xcept gv ...np......i1........OvI m a C m PtelaY MLInitnar Ohmisan. Noewvrlk. .J. VD7101 rt~n'.d Ift A SCE 26-426 Rev. 3 (Referce:,S0123-XXIV-71.5]
E&TS DEPARTMENT ICCN NOJ I l PRELIM. CCN NO. C-3 I Paae.39 of47 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN I Project or ECP: SONGS 2 & 3 Caro No. E4C-130-O.k,.TIill oUU9JCLU;. * &oV nftI,.4rr t.4lS *ur~
IIVru~ L.rlLUU vrau ~ ttmi L
r'e-t tfl*tb.l f
atu ft9 1"Ifteen
- uam;>
ICA 1(11 r- v~
.V
£djio 5Thimt
-. I~x
_1c nf
_ x vs A7 RIEV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l .
O C. B.Whltt 5/16/2005 Joshua Park 5/16/2005 =
_ C. B. Whittle 5/24/2005 Joshua Park 5/24/2005 9.3 o w-Typ a e-Re72 _l _-
don.p.steltzeusabb.c To: wh!ttibt~sonassace.corn
.fc Dm corkflltoaongs.sae.comt.ldmjsongsoscecm, su~m~s~aongs.s~e.cam 04&9=sO5p15 PM Subett:. Fn:Type RinR5ayModel411sT5375SpelTcaiiors Butch As Iong as the asjustnent pan be made thars Isno proplem wlth the-relay. Again the only thing to watch for Isrelay chatter Ifthe pick up and drop out are set to close and the voltage Inputvarles. Time delay siould take care ofthis:
There will be no probhrnes In operating the relay at this setting Thanks Don Message frui whillobscngs~se.om ranewe on 04?2A2OO 10:54 AM 041=20W2 WO.4 AM whtftblllsongs~scuecom To: Don P. StO12ZAULUSTROABBOASB o condl'songUs.Cso0m 8Latmifs~sangecs~c9n. krlloseras.scom Subect Typa 27N oaby Model 411T5375 Spedficaltons.
Hi Don, I just noticed that my original email stated that we were setting our 27N R1a2ay deadband at 0.3%. This should have been 0.3 Vac. This is equal to 0.254% of our approximately 118 Vac trip. Our technicians hve been able to rake this adjustment on the bench.
Please let me know if this is alrught.
Thanks, Butch Wbittle 463-3599 orwsaxded by DUI'CH WHETTLB/SONGS/SCB/EIX on 04/29/2005 07:47 Ax -----
BU)TCH To To:
don.p. steltzgus .abb. com 04/18/2005 12:47 CC: 1a C0MlKISoxGS/SC /EIX&SCz;, ;BFF PM SUJMKY/S0N-S/scE/E:1X2SCE, CrDOXi XiA/sOamG/sCE/EixesCEZ ALEX BAMMI/SCNGS/SCZ/EIXUSCZ.
SUE 26-426 Rev. 3 IRefeence: SUM-3XXIV-7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 40 of 47 k A 5 en Ad ^3 _h I asA__
L;ALU;ULAIIUN HEttI CCN CONVERSION:
ICCN NO. CCN Project or ECP:
Subject:
TLU Calc for Undervoltage RelaV Circuits at Class 1E 4 KV Switchgear Sheet 40 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. WhitUe 5/1W2005 Joshua Park 5/16/20051 I C. B. WhItle 5/24/2005 Joshua Park 5/24/2005
- DU?/SONGS/ScE7EIXfSCE,-
KxnERLY MOSLEYjSONGS/SCE/EIXOSCE, CECIL UAZLBY/SONGS/SCE/EIX2SCE subject: Type 27N Relay Model 411X5375 Specifications.
To: Mr. Don Steltz of ABB Power
Dear Mr. Steltz,
As you know, Sen Onofre Nuclear Generating Station has a nunber of AMB Type 27N Relays (Model *411T5375 with BF filter). 'Kc are currently involved in a effort to reduce the uncertainties associated vith the PU and DO voltage setpointo. Additionally we wish to reduce the deadbcnd '(difference between the PU and DO voltages) to 0.3 1 versus the AME specified 0.5%.
I would like to verify the following information that I received per our telephone conversation today.
1.) Effect of Reduced Deadband on Accuracys The deadband is field adjustable and can be set to less than 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 the cycling of the relay, if the voltage were to swing rapidly. SONGS currently is using a 2 second delay and therefore this effect would be minimized.
2.) Temperature Effect: Per the test data that we received from 7ME, the temperature effect is linear over the 10 - 40 degree C tenmerature range.
Therefore, if we reduce the cperational temperature band by one-half the uncertainty will be reduced by one-half. That is, the uncertaintly due to the temperature effect would be reduced from 0.4% to 0.2%.
3.) Drift (time related): ABB recoonends a recalibration interval of one to two years to ensure that the accuracy of the relay is maintained within the 0.2% repeatability specified. Therefore, the relay is relatively stable with respect to time and should drift by no rore 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 HU io-4zo Kev. 3 j
Reference:
Soj23-XXuV-7.15]
ICDN NOE E&;TS DEPARTMENT PRELIM. CCN NO. C-3 Paae 41 of 47
^ *...... _. . ................ __ ....... .
UALCULATIUN SHhEI CCN CONVERSION:
CCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No. E4C-1 30... .. .. .
Subject:
TLU Calc for Undervoltage Relay Circuits at Class 1 E 4 KV Switchagear Sheet 41 of 47 REV ORIGINATOR DATE IRE DATE REV F ORIGINATOR DATE IRE DATE 0 C. B. Whit~e 5/16/2005 Joshua Parkc 51161205.r 1 C.B.Whitte 5/24/2005 Joshua Park 512412005 9.4 Correspondence with GE Confirming Potential Transformer Model Number Change.
Tenhaagen, Chris To: <whiftcb0songsse.com>
MO(GE Energyf cc: 4dmjlaonasce.com>
- 1 cchrls.tenhaegen@ge. Subject RE Type JVMS9 Model Numbers 6¢3X94 versus Model Numrber cQ. > 7BS3X02*
OS0Om2OS 06:09 PM.
Butch
- - Yes, 643x94 VPs the old 6 digit *cat ntibex; 1 elaccd by by- the' - - ..- -
current 10 digit system. On our structure, it reads like this:
ATRITR TRANSPORMER S/02/05 23:01:07 7AThRIT PAIRT NU1M: 643XD94000 TPE JVx-3 M3D!L VT RATIO 35:l HERTZ 50-60 ILI. 60 SMC.VOLTS 120 REC XIMP H WEIGHT PRI VOLTS 420D CUSTOMER NMMER NSV R/iw.IM AT 30C 750 ON NP 643X054006 RF/VA/MYX AtT 55C 500 ACC CL AT 60 HZ 0.3 W,Z,M,Y PALSM PACK
. . M B id 0 REPL7CED 763XD21026 The analysis I provided should apply very'closely for both old and new produacts.
Chris
-- original Message----
From: whittlcb~son's.sce.com [1]
Sent: l'onday, May 02, 2005 5:16 PX To: Tenhasgen, Chris (GE Energy)
Cc: kimjisongs.ace.com
Subject:
Type JVM-3 Model 2umbers 643X94 versus Model Nwmber 763x02 Hi Chris, We have Model nurber 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 informstion in the online resources for the older (installed transformers.
Thanks, C a Whittle (949) 463-3599 (cell)
SUL 26-4ib ieYv.3 iReerencc 50123-XXIV-7.15J
ICCN NOJ E&TS DEPARTMENT l PRELIM. CCN NO. C-3 l Paae 42 of 47 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN I
- Project or ECP: SONGS 2 & 3 Calc No. E4C-130 C,,hrt TI I Efl~l fnrv I runlnt, R o Iftrir ite: nof Plncc I F A I(1 QAft#hnnnr Shent AP of A7 AJUuuJeaw.
- I..tJ WE l vSJ.
I ta, v1 atflO4 55vEJ L*u-aS - 1 -t8 I 'T ISs,-. _v Ad A REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 1 O C.B.Whittle 5/162005 Joshua Park 5/1= iDAT C. B. Whte 5/24/2005 Joshua Park M4J2005 _
_ 9.5 Degraded Voltage Relay Cable Voltage Drop Calculation
- - -I .......... 7_ .-- -- _ _ _ _ - -
- 1. Purpose/Scope The purpose of this Attachment is to calculate the maximum voltage drop in the cable between the potential transformer (PT) 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 Requiring 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 (Z1 ) 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.
SCE 26-426 Rev. 3 {
Reference:
S0123-X)CXIV7.15]
ICCN NOJ N E&TS DEPARTMENT IPRELIM. CCN NO. C-3 l Pate 43 of 47 CALCULATION SHEET CON CONVERSION:
I CON NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Rtihihet TLU Calc far tUndervnItaaL%Relav Circuits at Class 1 E 4 KV Switchaear Sheet 43 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE l 0 C. B. Who S516/2005 Joshua Park 5/16/2005 C 2 1 C. B. Whtte 5/2412005 Joshua Park 5/2412005 4.3 Cable size #12 AWG. is used between the secondary terminals of potential transformer and fuse. I See References 6.1.1 to 6.1.14. ~1 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:
Z#14AWG = 0.3135 +j 0.00765 ohms/100 ft 7Z*12AWG = 0.1972 +j 0.00710 ohrns/100 ft The cable resistance is based on an ambient temperature of 750C.
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 (127F-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 (DFR) 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 (Z1 ). 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, 4160VSwitchgeariBus 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 SCE2G-426 Rev. 3 (
Reference:
SOI 23-XXIV-7.15]
E&TS DEPARTMENT I ICCN NOJ I PRELIM. CCN NO. C-3 PaOe 44 Of47 UALUULAI1UN SHE TI 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 Switchgear Sheet 44 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE 0 C. B. Whittle 5116/20051 Joshua Park 511612005 S 1 C. B.Whitte 5/24/2005 Joshua Park 5/2412005 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, 4.16 kV 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 (ESF) 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, 4.16 kV 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 AB 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-M0008 Rev. 0, ABB Type SVF, SVF-l, SVF-3, SVF-31 Relays 6.3.4 S0123-306-6-16 Rev. 0, Volume 1,Digital Fault Recorder for Southern Califomia 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 {Referce: S0123-XXIV-7.15]
ICCN NO./
E&TS DEPARTMENT PRELIM. CCN NO. C-3 Paoe 45 of 47 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN Project or ECP: SONGS 2 & 3 Calc No.
- E4C-130 . - - - ... -... . .....
Sublact: TLU Calc for Undervoltace Relay Circuits at Class 1E 4 KV Swltchaear Sheet 45 of 47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE _
0 C.B. WhItte 5/16/2005 Joshua Park 5/1612005 .C) 1 C. B. Whitte 5/24/2005 Joshua Park 5/24/2005=
PT Circuit #2 has more loads connected than PT Circuit #1. Therefore, PT Circuit #2 will be used to ._I evaluate the total voltage drop in the cable. See as tables in Section ITaina4.97,2 ofithe 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#1 2 Z#1 4 12 Figure 1. Degraded Voltage Relay cable voltage drop calculation Where Z;#12 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 V, 12 Voltage drop across cable #12 AWG V"14 Voltage drop across cable #14 AWG 1I 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 +j 7.72 VA S127F = 0.7 +j 2.3 VA SDFR = 0.288 +j 0 VA SCE 2426 Rev. 3 {Rfefnce: SO123-XX-IV7.15]
ICCN NOJ E&TS DEPARTMENT PRELIM. CCN NO. C-3 Pace 46 of 47 CALCULATION SHEET CCN CONVERSION:
CCN NO. CCN I
4Qttlat- TiLl I ZUV~z.1 Caslcfnr
~~~*.._
-_l9 IInrlarunhnnA W- -- ._ ~- ..-.--
Relav Ctirciuits at Class IF A 4KV Swltnhar Sheet 46 of -
47 REV ORIGINATOR DATE IRE DATE REV ORIGINATOR DATE IRE DATE C=
o C. B. WhIte 51 61Z005 Joshua Park S116/20W5 = = i <
t C. B. WhitUe 5J24/2005 Joshua Park 5/24/2005 _
STDVI =0.2+j0 VA
_.._. . . I-S1 =SIZR +S 127F+ SDFR+ STDVI
= 16.4 + j 10.02 VA S2 =0.5+j0 VA 7.2 Calculate Cable Resistance at 95°F (35°C)
The cable resistance is calculated using equation:
Rz = RI * (234.5 + T2 ) / (234.5 + T 1)
Where T1 is 75C RI is the resistance at 75 0C T2 is 35°C R2 is the resistance at 35°C The cable resistance at 35 0C is:
Z714AWG = 0.2730 +j 0.00765 ohms/100 ft 7-*l2AWG = 0.1717 +j 0.00710 ohms/100 ft 7.3 Calculate Load Current II =S 1 /120Z0 0
= 0.14 +j 0.084 A
=0.163 Z30.96 0 A 12 = S2 / (120 Z 0°)
= 0.0042 / O° A SCE 26-426 Rev. 3 {
Reference:
S0123-XXIV-7.15]
E&TS DEPARTMENT IMCCN NONN - IPace 47 of IPRELIM. CCN NO. C-3 Pae7of4 CALCULATION SHEET CCN CONVERSION:
ICCN NO. CCN I Project or ECP: SONGS 2 & 3 Calc No. E4C-130 Siihct:
-- J--I- TLU Caln---- for IIndervnIhtne Relav Cirmults at Clans 1 E 4 KV Swltchaear Sheet 47 of 47 REV ORIGINATOR DATE IR DATE REV JORIGINATOR DATE IRE DATE l O C. B. Whittle 5/1612005 Joshua Park 5/1612005 -
1 C. B. WhIltle 5/2412005 Joshua Park 5/2412005 J 7.4 Calculate Cable Imnedance
- t . . . *--
Cable impedance is double to account for the return path. The circuit is only grounded at one point in Cubicle 15.
Z414 = 2 * (40 ft / 100 ft) * [ 0.2730 + j 0.00765] ohms
= 2* (0.1092 +j 0.0031) ohms
= 0.2184/ 1.63° ohms 4¢12 = 2 * (15 ft / 100 ft) * [ 0.1717 +j 0.00710] ohms
=2 * (0.0258 +j 0.001065) ohms
= 0.0516 Z 2.360 ohms 7.5 Calculate Total Voltage Drop AXV2 = 12
- Z414
= (0.0042 Z /0 A) * (0.2184 Z 1.630 ohms)
= 0.000917 Z 1.63° V AVI =(I+ 12) *Z712
= (0.1669 Z 30.220 A) * (0.0516 Z 2.360 ohms)
= 0.00861 L 32.580 V AVw =AV1 + AV 2
= 0.0082 +j 0.0047
= 0.0095 Z 29.80 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.
SCE 26-426 Rev. 3 {
Reference:
S0123-XXIV-7.15]