ML18152A931

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Attachment 5: Second Level Undervoltage Relay Setpoint Calculation
ML18152A931
Person / Time
Site: Palisades Entergy icon.png
Issue date: 05/30/2018
From:
Entergy Nuclear Operations
To:
Office of Nuclear Reactor Regulation
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ML18152A922 List:
References
PNP 2018-010
Download: ML18152A931 (42)
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{{#Wiki_filter:PNP 2018-010 ATTACHMENT 5 Second Level Undervoltage Relay Setpoint Calculation This attachment contains an excerpt of calculation EA-ELEC-VOL T-033 , Revision 1 , Second Level Undervoltage Relay Setpoint Calculation. Attachments 3 and 4 , which consist of memorandums of telephone conversations , are illegible and were removed. 41 pages follow A TT ACH M ENT 9.2 E N GI N EERI N G CALCUL A T I O N CO V E R P A G E Sh ee t 1 o f 2 0 A N0-1 0 A N 0-2 0GGNS 0 IP-2 0 IP-3 12:$1 PLP 0JAF OPNPS ORBS OV Y ows 0 N P-GG N S-3 0 NP-RBS-3 CAL C U LATI O N <1> EC# 1 3204 <2>page 1 of 1 COVER PAGE c 3 i Design Basis Cale. YES ONO (4) CALCULATION D EC Ma r kup \:>' Calculation No: EA-ELEC-VOLT-033 \OJ Revision: 1 (I) Title: Second Level Unde r voltage Relay Setpoint l!S J Editorial DYES ~NO \~} System(s): SPS tiui Review Org (Department): Design Engineering (11> Safety Class: C 1 2> Component/Equipment/Structure Type/Number: Safety/ Quality Related Relay 127-7/){Y Relay 127-8/)CY D Augmented Quality Program D Non-Safety Rela t ed Relay 127-7NZ Relay 127-8NZ Relay 1 27-7/ZX Relay 127-8/ZX (1 3> Document T ype: Cale (1 4> Keywords (Desc r iptionfropica l Codes): U ndervo lt age r elay Degraded g ri d Second level R EVIEWS (15> Name/Signature/Date (15> Name/Signature/Date (17> Name/Signature/Date q J~ob Hc1.mm . JcW~~Broc~~;(.: 1/,_ ~n ~/?va. l 11.z~vr-1... 3L'B L1 D '/. l-/3, c"'/D /J. > '1.:/1 J ' j [gr QE sign Verifier , " SupervisorfApproval Responsible Engineer D Reviewer [gJ Comments Attached D Comments Attached EN-DC-1 2 6 R E.\b3 =1 ATT ACHM E NT 9.3 C ALCULATION R EFER E NCE S HEET Sheet 1 of 3 CALCULATION CAL C U L A T ION NO: EA-E L EC-VOL T-0 33 REFERENCE SHEET REVISION: 1 I. EC Markups Incorporated (N/A t o NP calc ul at i o n s) 1. 2. 3. 4. 5. 11. Relationships

Sht Rev Input Output Impa c t Track i ng Doc Doc YIN No. 1.EA-ELEC-VOL T-034 ---0 IBJ D N ---2.Technical Specificatio n s ---189 IBJ D N ---SR 3.3.5 3EA-ELEC-EDSA-04 ---0 IBJ D N ---4 .. EA-ELEC-EDSA-03

---1 D IBJ y DRN-1 0-00490 5.EA-ELEC-EDSA-05 ---0 D IBJ y LO-WTPLP-2010-00110 111. CROSS

REFERENCES:

1. N/A 2. 3. 4. 5. IV. SOFTWARE USED: Title: N I A Vers i on/Release: D i sk/CD No. V. DISK/CDS INCLUDED: Title: NIA Vers i on/Release Disk/CD No. VI. OTHER CHANGES: EA-ELEC-VOL T-033 supersedes the following two calculat i ons; 1) Cale 1C/108-J9400

/127-7 R3 2) C al e 1 D/2 0 3-J 9 401/127-8 R 3 EN-DC-1 26 REV 3 ATTACHMENT9.1 DESIGN VERIFICATION COVER PAGE Sheet 1 of 1 DESIGN VERIFICATION COVER PAGE 0 AN0-1 0 AN0-2 0 IP-2 0 IP-3 OJAF (gJ PLP 0 PNPS DVY 0 GGNS ORBS 0W3 ONP Document No. EA-ELEC-VOL T-033 I Revisiin No. \ Page 1 of 1_ Title: (gJ Quality Related D Augmented Quality Related DV Method: D Design Review D Alternate Calculation D Qualification Testing VERIFICATION REQUIRED DISCIPLINE VERIFICATION COMPLETE AND COMMENTS RESS,; VED (DV pr i nt , sign , and dat&'l / / l6J Electrical Greg B roe!</ /!l. (!jl ~o D Mechanical ,:/ D Instrument and Control D Civil/Structural D Nuclear D LJ Originator: Bob Hamm/ J!¥1v111~ 3/ 8/io Print/Sign/Date After Comments Have Been Resolved -c1 EN-DC-134 REV 3 -~ I~-ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet 1 of 3 IDENTIFICATION

DISCIPLINE
Document Title: Second Level Undervoltage Relay Setpoint 0Civil/Structural

~Electrical Do c. No.: EA-ELEC-VOL T-033 .i J ///,1-ev. y QA Cat. Ol&C OM e chani c al Gr e g Brock _/~Y//~t 3/;y,/'lD 0Nuclear Ver i fier: Print I Siqn " Date 00ther Ma n ager author i zation for superv i sor p e rforming Verification. N/A D N/A Print Sign Date METHOD OF VERIFICATION

Design Rev i ew Alternate Calcu l ations D Qualification Test D The following basic questions are addressed as applicable , during the performance of any design verification. [ANSI N45.2.11-1974] [NP QAPD , Part II , Section 3] [NP NQA-1-1994 , Part I , BR 3, Supplement 3S-1] NOTE The reviewer can use the " Comments/Continuation sheet" at the end for entering any comment/resolution along w i th the appropr i ate question number. Add i tional items with new question numbers can also be entered. 1. Design Inputs -Were the inputs correctly selected and incorporated into the design? (Design inputs include design bases , plant operationa l conditions , performance requirements , regulatory requirements and commitments , codes , s t andards , field data , etc. All information used as design in p uts should have been reviewed and approved by the responsible design org a nization , as applicable.

All inputs ne e d to be retrievable or ex c erpts of documents used should be attached. See site specific design input procedures for guidance in identifying inputs.) Yes l:8l No D N/A D 2. Assumptions -Are assumptions nec e ssary t o p e rform the design act i v i ty adequately de s cr i bed and reasonable? Where necessary , are assumptions identified for subsequent re-verification when the detailed activities are completed? Are the latest applicable revisions of design documents utilized? Yes l:8l No D N/A D 3. Quality Assurance -Are the appropr i ate quality and quality assurance requirements specified? Yes l:8l No D N/A D EN-DC-134 REV 3 ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet2 of 3 4. Codes, Standards and Regulatory Requirements -Are the applicable codes, standards and regulatory requirements, including issue and addenda properly identified and are their requirements for design met? Yes 0 No D N/A D 5. Construction and Operating Experience -Have applicable construction and operating experience been considered? Yes 0 No D N/A D 6. Interfaces -Have the design interface requirements been satisfied and documented? Yes 0 No O N/A 0 7. Methods -Was an appropriate design or analytical (for calculations) method used? Yes 0 No D N/A 0 8. Design Outputs -Is the output reasonable compared to the inputs? Yes 0 No D N/A D 9. Parts , Equipment and Processes -Are the specified parts , equipment, and processes suitable for the required application? Yes O No O N/A 0 10. Materials Compatibility -Are the specified materials compatible with each other and the design environmental conditions to which the material will be exposed? Yes D No D N/A 0 11. Maintenance requirements -Have adequate ma i ntenance features and requirements been specified? Yes D No D N/A 0 12. Accessibility for Maintenance -Are accessibility and other design provisions adequate for performance of needed maintenance and repair? Yes O No D N/A 0 13. Accessibility for In-service Inspection -Has adequate accessibility been provided to perform the in-service inspection expected to be required during the plant life? Yes O No O N/A 0 14. Radiation Exposure -Has the design properly considered radiation exposure to the public and plant personnel? Yes D No D N/A 0 15. Acceptance Criteria -Are the acceptance criteria incorporated in the design documents sufficient to allow verification that design requirements have been satisfactorily accomplished? Yes 0 No D N/A D 16. Test Requirements -Have adequate pre-operational and subsequent periodic test requirements been appropriately specified? Yes D No D N/A 0 EN-DC-134 REV 3 ATTACHMENT

9.6 DESIGN

VERIFICATION CHECKLIST Sheet 3 of 3 17. Handling , Storage , Cleaning and Shipping -Are adequate handling , storage , clean i ng and shipping requirements specified? Yes D No D N/A 18. Ide n tificat i on Requirements -Are adequate identi fi ca t ion requ i reme n ts spec i fied? Yes D No D N/A 19. Records and Documentation -Are requirements for record preparat i on , review , approval , retention , etc., adequately specified? Are all documents prepared in a clear legible manner suit a ble f o r mi c rofilming and/or oth e r d o cumentatio n storage method? Ha ve all impa c t e d documents b e en identified for update as necessary? Yes No D N/A D 20. Software Qual i ty Assurance-ENN sites: For a calculation that utilized software applications (e.g., GOTHIC , SYMCORD), was it properly verified and validated in accordance with EN-IT-104 or previous si t e SQA Program? ENS sites: Th i s i s an EN-IT-10 4 t ask. However, per ENS-DC-126 , for exempt software , was i t ver i fied in the calculat i on? Yes D No D N/A 21. Has adverse impact on peripheral components and systems , outside the boundary of the document being verified , been considered? Yes D No D N/A EN-DC-134 REV 3 ATTACHMENT

9.7 DESIGN

VERIFICATION COMMENT SHEET Sheet 1 of 1 Comments/ Continuation Sheet Question Comments Resolution Initial/Date

  1. Identified de control voltage as a Changed de contro l voltage from GJB/3/4/01 random error in place of a non-random non-random error to random erro r. error. Results in sl i ght change to relay p i ckup vo l tage. Calibration assumption
  2. 8; include Incorporated GJB/3/4/01 possibility of using signal generator with THO less than 0.3%. Change reference 1 from EA-ELEC-Incorporated GJB/3/4/01 VOL T-017 to EA-ELEC-EDSA-04. EN-DC-134 REV 3 PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-ELEC-VOL T-033 Sheet 1 of 18 Revision 1 Revision Number 0 a 1 RECORD OF REVISION Description Of Change Original issue. The error analysis for the Second Level Undervoltage trip units , 127-7XY , 127-7XZ , 127-7YZ , 127-8XY , 127-8XZ , and 127-8YZ is being revised to provide additional operating margin between the nominal operating voltage and the maximum trip setting of the trip units. Reductions in the total error associated with the instrumentation loop are based on the following: The analysis requires that the undervoltage devices be cal i brated with Fluke 45 Multimeter or equivalent The Fluke 45 is more accurate than the M&TE specified in Revision 0. The local ambient temperature at the undervoltage devices during calibration will be specified to be within a narrow range. This reduces the errors associated with ambient temperature changes near the equipment during operations. A discuss i on on the effects of harmon i cs in the actual voltage being monitored and the output of the signal generator used to calibrate the undervoltage devices is provided. A discussion of the basis for the relay time delay setting including a discussion of timer accuracy is provided. Rev " a" was approved under NMC EC 10986 on 12/19/07 as revision 1. The migrated EC is 5000122598 and was cancelled and the calculat i on as revision 1 was never issued Rev 1 used Rev " a" and changed the control voltage effect from non-random to random error. Revised assumption 8 and revised reference
1. Revision 1 is to b e issued per EC 13204. Revision 1 supersedes two calculations
1C-108-J9400-127-7 R3 and 1 D-203-J9401-127-8 R3 PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET 1.0 PURPOSE EA-ELEC-VOL T-033 Sheet 2 of 18 Revision 1 The purpose of this calculation i s to determine setpo i nts fo r the ABB/ITE-27N level undervoltage relay , catalog number 211T6175 at Palisades Station Buses 1 C and 1 D based on an Analytical Limit of 2184 V (91 % of 2400 V) in accordance with Reference
1. The calculation also provides the basis for selection of the 0.65 second relay time delay setting. The calculation for each setpoint will consider the setpoint error of the circuit that monitors the voltage at the 2.4 KV safety related switchgear. The circuit for Buses 1 C and 1 D consists of a Siemens 2400-120 volt voltage transformer (VT), Part No. 61-300-043-and an ABB/ITE-27N undervoltage relay (catalog number 211T6175). 2.0 METHODOLOGY The setpoints for the second level undervoltage devices will be determined based on the methodology provided in EGAD-ELEC-08 , Instrument Loop Uncertainty and Setpoint Methodology , Revision 1 , Reference
2. 3.0 ACCEPTANCE CRITERIA FSAR Section 8.6.3.2 States the following regarding the undervoltage setpoints:

" The voltage trip set point has been set low enough such that spurious trips of the offsite source due to operation of the undervoltage relays are not expected for any combination of unit loads and normal grid voltages. This set point at the 2,400 volt bus and reflected down to the 480 volt buses has been verified through analysis to be greater than the minimum allowable motor voltage (90% of nom i nal voltage). Motors are the most limiting equ i pment in the system. MCC contactor pickup and drop-out voltage i s also adequate at the set-po i nt values. The analysis ensured that the distribution system is capable of starting and operating safety-related equipment within the equipment voltage rating at the allowed source voltages. The power distribution system model used in the analysis has been verified by actual testing." The setpoint will be based on the Analytical Limit of 91 % of 2400 volts (2184 volts) for low voltage. This choice of an analytic limit is conservative with respect to the limits of 90.15% for Bus 1 C and 90.83% for Bus 10 determined in Calculation EA-ELEC-EDSA-

04. Operation above this voltage level assures that the voltages on the safety related busses are adequate to power safety related equipment down to the 480 V level and PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-ELEC-VOL T-033 Sheet 3 of 18 Revision 1 thus meet the FSAR statement regarding undervoltage setpoints.

Technica l Specification Surve ill ance Requ ir ement SR 3.3.5.2 requires that the degraded voltage setpoint Allowable Value be between 2187 Volts and 2264 volts. This calculation will determine the setpoint necessary to meet the above constraints. The undervoltage relays are configured in a three-out-of three coincident logic to preclude spurious trips. They are also equipped with an internal time delay used to prevent spurious trips. Initiation of all three phases starts the associated diesel generator after completion of the internal time delay. The time delay is adjustable between 0.1 -1.0 seconds. Technical Specification Surveillance Requirement SR 3.3.5.2 requ i res that the time th i s time delay be between 0.5 to 0.8 seconds. This calculat i on determines the time delay setting necessary to meet this criteria. 4.0 CALIBRATION ASSUMPTIONS The uncerta i nty analysis utilizes instrument errors based on the measuring and test equipment currently available at Palisades. Use of other models of test equipment is acceptable provided the specifications of the test equipment meet or exceed the specifications of the equipment identified below. 1. The relays are cal i brated at an ambient temperature between 65°F and 90°F. Ca li bration procedures (RT-137 and RT-138 , " Calibrat i on of Bus 1C (1D) Undervoltage and Time Delay Relays) for the undervoltage incorporate this requirement.

2. The undervoltage devices are calibrated using a Fluke 45 or equivalent multimeter. Calibration procedures (RT-137 and RT-138 , " Calibration of Bus 1C (10) Undervoltage and Time Delay Relays) for the undervoltage relays will incorporate this requirement.
3. The setting tolerance due to human error used for setting the trip un i t voltage is assumed to be+/- 0.1 V , which corresponds to+/- 0.091 % for a setpoint expected to be near 110 V. 4. Instrument Drift is not specified in the ABB 27N Instruction Manual. For Calibration at 18 months intervals , a 0.2% drift is assumed. This is reasonable based on past cal i bration data for the devices. Increased drift will be flagged by the as-found calibration data being outside the as-found acceptance criteria. 5. The temperature inside the cabinets housing the ABB 27N Undervoltage Relays is assumed to be 5°F above the ambient temperature. This is reasonable as the only energized equipment within the cab i net are a 62 Time Delay Relay and the 27N relays. These relays draw less than 0.05 amps at 125 VDC (Reference 3). As there PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 4 of 18 Revision 1 are 3 27N and 1 ABB 62 Relays in the cabinet , the heat input is on the order of 25 Watts. The cabinet housing the relays is 48" X36" X16" mounted on a concrete wall w i th a 6" conduit venting it at the top. A 5°F rise inside the cabinet is conservative for the s i ze of the cab i net and the low power input to the cab i net. 6. It is a general practice for vendors to provide dev i ce reference accuracy as a 2(cr) value. Therefore , all reference accuracy specifications , unless otherwise noted , are assumed to be 2(cr) values. 7. The voltage drop in the cables between the VT and relay are neglig i ble and will be neglected. This is conservative as the voltage drop results in the relay seeing a lower voltage than actual and thus tripp i ng earlier. 8. NRG Information notice IN 95-05 , Undervoltage Protection Relay Settings Out of Tolerance Due to Test Equipment Harmon i cs ," (Reference
11) was issued as a result of not i ceable effects that test equipment harmonics have on ABB/ITE 27N undervoltage relay performance. To elim i nate cal i brat i on i ssues related to harmon i cs , it is assumed that either a h i gh prec i s i on signa l generator having total harmonic distortion of less than 0.3%(such as a Manta MTS-5000 Protective Relay Test System) is used , or that the harmonic content of the live input to the undervoltage relay is determined using a Power System Quality meter (such as a Fluke 41 ). The measured harmon i c content is then input to the signal generator pr i or to relay calibrat i on. Either of these methods is acceptable as documented in NRG Information notice IN 95-05. The use of either method has no impact on the errors calculated herein. 9. Calibrat i on of the relay time delay will be performed using a W i lmar T i mer. Th i s device has an accuracy which is conservatively+/-

2 cycles (+/- 0.034 seconds) for measurements of less than 10 seconds.

5.0 REFERENCES

1. Calculat i on EA-ELEC-EDSA-04 , Rev.O , 2. Eng i neering A i d , EGAD-ELEC-08 , " Inst r ument Loop Uncerta i nty and Setpo i nt Methodology

," Rev i s i on 1 3. ABB 27N Instruction Manual , IB 7.4.1.7-7 , Issue E (Attachment

1) 4. Fluke 45 Append i x A Specificat i ons , (Attachment
2) 5. Electrical Schematic E-17 Sheet 4 , Rev i sion 31 , " Logic Diagram -2400 Volt Load Shed. 6. Electrical Schematic E-11 , Rev i s i on 31 , " Schemat i c Mete r and Relay D i ag r am ,

PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET 2.4 KV System. EA-EL EC-VOL T-033 Sheet 5 of 18 Revision 1 7. Electrical Schematic E-137 , Sht.1 , Rev.25 , -Schematic Diagram 2400V & 4160V Bus Undervoltage & Load Shedd i ng 8. Engineering Analysis EA-EL EC-VOL T-034 , Revision 0 , Calculation of VT Burden and Ratio Correction Factor for 2400 V Safety Related Buses." 9. Memorandum of Telephone Conversation between C. Downs of ABB and A. Ashrafi of S&L concerning ABB 27N relay characteristics , Dated 09/04/1994. (Attachment

3) 10. Memorandum of Telephone Conversation between C. Downs of ABB and H. Ashrafi of S&L concerning effect of temperature on the ABB-27N relays with Harmonic Filter Units , dated 03/30/1992. (Attachment
4) 11. NRC Information notice IN 95-05 , Undervoltage Protection Relay Settings out of Tolerance Due to test Equipment Harmonics." 12. Technical Specification Requirement SR 3.3.5 , " Diesel Generator (DG) -Undervoltage Start (UV Start)." 13. Wilmar Electronics Bulletin SC-101 , " Solid State Digital Timer Specifications

." (Attachment

5) 5.0 INPUT DATA Loop Configuration Each phase of the ungrounded Safety Related 2400 V buses is monitored by an ABB 27N undervoltage relay. Each relay is fed from a 2400-120 volt VT (Y grounded-y grounded). The undervoltage relays initiate contact closure when the input voltage falls below the setpoint.

Closure of all three undervoltage relays initiates a diesel generator start signal , and simultaneously initiates a six second timer. If voltage in at least one of the undervoltage relays does not recover above the reset point of the relay within the six second time delay , a load shed signal is initiated , the diesel breaker closes , and loads are reinitiated onto the bus via a load sequencer. (Refer to References 5 and 6) Power to the undervoltage relays is provided from the plant 125 Volt DC system. Refer to Reference 7 for the power source. VT Information (Reference

8)

PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 6 of 18 Revision 1 Siemens Type 61-300-043-024 Voltage ratio: 2400-120 Accuracy class: 0.3W , X , Y -1.22 Frequency: 60 Hz ABB 27N Undervoltage Relay Information (Reference

3) Catalog Model 211T6175 Setpoint Ranges Pickup Tap Range+/-: 60V-11 OV Dropout: 70%-*99.0% of Pickup Dropout Delay: 0.1-1 sec.
  • Note: Difference between pickup and dropout can be set as low as 0.5% Operating Ranges Control Voltage: 100-140Vdc (125 Vdc nom) Temperature
-30 to+ 70°C Repeatability Tolerances

@ canst. temp & canst. control volt: for volt. range 100 -140 Vdc: for temp. range -20 to + 55°C: o to+ 40°C: -20 to + 70°C: Time Delay Definite Time Models Measuring and Test Equipment FLUKE 45 or Equivalent (Reference

4) +/- 0.1% +/- 0.1% +/-0.4% +/- 0.2% +/- 0.7% +/- 10% or+/- 20 msec whichever is greater Reference Accuracy:

+/- (0.2% + 10 digits) PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET Full Scale: Resolution

Response Time: EA-ELEC-VOL T -033 Sheet 7 of 18 Revision 1 300 Vac 10 mVon the 300 V Range , Medium Rate :55 seconds to rated Accuracy Wilmar SC-101 Timer (Reference
13) Accuracy (Mill i sec Range/Dry Contact) +/- (0.06% of reading + 1 LSD+ 1ms) Temperature Data The undervoltage relays are located in the 1/C and 1/D switchgear rooms which are mild environments. The ambient temperature in these rooms ranges between 50°F and 104°F (Reference FSAR Table 9-13). As noted in assumption 4 , it is assumed that the temperature inside the control cabinet housing the undervoltage relays can be 5°F above ambient. Therefore for temperature related errors , it is assumed that the relays operate between 50°F and 109°F. To minimize errors associated with temperature effects , the ambient temperature at which the relays can be calibrated is procedurally limited to between 65°F and 90°F. (Assumption
1) Relay Power Input Power to the undervoltage relays is provided from the plant batteries. The voltage range of the plant DC system is from 105 -138 VDC. (Reference FSAR Sections 8.4.2.2 and 8.4.2.3) Analytical Limit Per Reference 1 , the minimum voltage allowed at the 2400 v Safety Related Susses for adequate auxiliary system performance is 2163.6V at Bus 1 C and 2179.9V at Bus 1 D. As d i scussed in the Assumptions , a minimum voltage of 2184 V will be used as the Analytical Limit for conservatism. Per Reference 12 , the worst case relay time delay assumed in the diesel generator start timing calculation is 0.8 seconds. 6.0 Calculation PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET 6.1 Method EA-EL EC-VOL T-033 Sheet 8 of 18 Revision 1 The methodology for determining the setpoints is based on the methods in Reference
2. The nomenclature for the relay setpoint terms , such as pickup , dropout, and reset is taken directly from the relay instruction bulletin (Reference 3). A. The error associated with the VT is provided in Reference
8. The error for the VT is Classified as a non-random process error and is based on the burden magnitude and power factor on the VT. It is shown in Reference 8 that the ratio error of the VT's could range between -0.13% and +O. 726%. The VT accuracy is mainly determined by the magnitude of the voltage drop in the VT and by the magnitude of the exciting current drawn by the VT. Neither of the two factors will change appreciably with environmental factors. Therefore , no additional error in the VT will be introduced due to environmental factors. B. The error associated with the second-level undervoltage relay will be established. The following items will be considered in determining the setpoint error as a result of the relay: Reference accuracy (defined by the manufacturer as repeatability at constant Temperature and constant control voltage) Calibration instrument error ( defined by the manufacturer)

Temperature effect (defined by the manufacturer as repeatability over temperature range) Control voltage effect (defined by the manufacturer as repeatability over the allowable de control power range). Long term drift (setpoint drift between calibration intervals , see Assumption

4) Relay setting tolerance (see Assumption
3) Reference accuracy, long term drift , Calibration instrument error , relay setting tolerance , and control voltage effect are classified as random errors , and will be combined by the " Square Root of the Sum of the Squares" (SRSS) method. Temperature effect is classified as a non-random error since this variation is linear and it's effect can be predicted.

All non-random will be added together by straight addition. errors C. The errors identified above will be combined into the total error by adding the total random error to the total non-random error (Reference 2). PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 9 of 18 Revision 1 D. The nominal dropout for the undervoltage relay will be determined by adding the total negative error to the Analytical Limit. No additional margin will be considered in this calculation since all applicable components in the circuit have been accurately represented. E. The maximum dropout for the undervoltage relay will be determined by adding the total positive error to the nominal dropout value. 6.2 CALCULATION (RELAY SETPOINT) This section calculates the relay setpoint and allowable value based on the errors associated with the components in the instrument loop. A. In Reference 8 it has been shown that the ratio error of the VT is between -0.13% and +0.726%. The maximum limiting errors will be considered in the relay setpoint calculation. The error contributed by the VT is considered to be a process error since the VT is not a calibrated device. This is classified as a random error. rvT = -0.13%, + 0. 726% (non random) B. The error introduced by the second-level undervoltage relay including M& TE effects is developed below: 1. Reference accuracy including repeatability at constant temperature and constant control voltage per reference 3 is+/- 0.1 %. rRA = +/- 0.1 % (random) 2. Per reference 3 , control voltage effect is +/- 0.1 % over the de control voltage range of 100-140 Vdc. This is classified as a random error rev=+/- 0.1 % ( random) 3. Measuring Instrument Error. A Fluke 45 or equivalent is used for relay calibration. A 300 Vac range and medium reading rate is used. The resolution is 10 mv. The reference accuracy of a Fluke 45 Multimeter for a 60 Hz voltage signal is+/- (0.2% of reading + 10 least significant digits). The linear resolution at PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 10 of 18 Revision 1 medium sampling rate on the 300 V range is 0.01 V. Thus , each digit corresponds to 0.01 V. Therefore , the reference accuracy is +/- (0.2% of reading + 10*0.01 V). If the relay is set near 110 V , then the error is equivalent to+/- 0.291 %. rM&TE = +/- 0.291 % (random) 4. Temperature effect: The temperature effect is published as+/- 0.4% over the temperature range of -20°C to+ 55°C. Use of this temperature range error is conservative as the design ambient temperature in the rooms where the relays are located is 10°C to 40°C. The error per °C is thus: COEF = +/- 0.4 %/ (55°C + 20°C) = +/- 0.0053% / °C. Temperature effects are linear in that the actual pickup and dropout voltages are higher than the setpoint values if the operating temperature is higher than the temperature at which the relay was calibrated. (Attachment

4) Similarly , the pickup and dropout voltages are lower than the setpoint values if the operating temperature is lower than the calibration temperature. (Attachment
4) Then , for a temperature range of 10.00°C (50°F) to 42.8°C (109°F) for Buses 1 C and 1 D and a relay calibration temperature range of 18.3°C (65°) to 32.2°C (90°F), the temperature effect is developed below: Negative Temperature Effect: In determining the error due to the negative temperature effect , it will be considered that the relay is calibrated at a temperature of 32.2°C (90°F). This is the maximum temperature allowed for calibrating the relay. Negative Temp. effect= (32.2°C -10.0°C)* 0.0053% / 0 c. = -0.118% for Buses 1C and 10. rT-= -0.118% (non random) Positive Temperature Effect: In determining the error due to the positive temperature effect , it will be considered that the relay is calibrated at a temperature of 18.3°C (65°F). This is the minimum temperature allowed for calibrating the relay.

PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 11 of 18 Revision 1 Positive Temperature effect= (42.8°C -18.3°C)

  • 0.0053%/°C = 0.1299% for Buses 1 C and 1 D. rT+ = +0.1299% (non random) 5. The relay setting tolerance is+/- 0.091 % (Assumption 3). This i s a random error. I:sT = +/- 0.091 °lo (random) 6. Long term drift error is expected at+/- 0.2% for the re l ay i f the relay is calibrated between 18 to 24 months intervals (Assumpt i on 4). I:oR: +/- 0.2% (random) C. The random and non-random errors determined for buses 1 C and 1 D are now combined. Negative Non-random error for the subject Buses = 0.13% (VT error) + 0.118% (from relay temperature effect) = 0.248%. I:NR-: 0.248% Positive Non-random error for the subject Buses = 0. 726% (VT error) + 0.1299% (from relay temperature effect) = 0.856%. I:NR+: 0.856% The equivalent random error is determined by the " Square-root of the Sum of the Squares" method. The random errors include relay reference accuracy , calibration instrument error , relay setting tolerance , and long term drift error. I:Rand= +/- ((0.1)2 + (0.291)2 + (0.091)2 + (0.2)2 + (Q.1)2)1 1 2 I:Rand: +/-0.391 °lo The total error is now calculated based on the errors calculated above and using: Total Error= Non Random+ Random Total negative error (TNE):

l PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-ELEC-VOL T-033 Sheet 12 of 18 Revision 1 TNE = rRand + rNR-= -(0.391% + 0.248%) TNE = -0.639% Total Positive Error (TPE): TPE = rRand + rNR+ = 0.391 % + 0.856% TPE = 1.247% D. The relay setpoints are calculated below: The Analytical Limit (AL) per Section 5 is 2184 V. This is the minimum voltage at which the relay is required to drop out to assure adequate voltage at all levels. The VT ratio of the transformer is 20. This results in a voltage of 109.2 V (2184/20) at the input to the undervoltage relay at the analytical limit. The setpoint equals the Analytical Limit+ (Total Negative Error) (Nominal Setpoint). Setpoint (SP) =AL+ SP(TNE) SP = AL/ (1-TNE) = 109.2/ (1-0.00639) SP= 109.90 V (Use 110 V for conservatism) The maximum voltage at which the relay will drop out for a nominal setpoint of 110.0 volts is: Max Dropout= SP+ SP (TPE) = 110.0 + 110.0 (.01247) Max Dropout= 111.37 V E. Relay Reset The relay reset is set during calibration to be 0.5% above the dropout setting. The relay reset moves in conjunction with the dropout setting and thus the reset settings are as follows: Reset at AL= Reset at Setpoint = Reset Maximum = F. Allowable Value 109.20 (1.005) = 109.75 V 110.00 (1.005) = 110.55 V 111.37 (1.005) = 111.93 V PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-ELEC-VOL T-033 Sheet 13 of 18 Revision 1 During calibration , the as-found value of the setpoint is recorded to assure that the relay has not drifted outside of values expected during the interval between calibrations. This section will determine allowable values for incorporation into the procedure to use to compare history. As described in the determination of setpoints for the undervoltage relays , the relays are sensitive to changes in ambient temperatures. The allowable values determined will account for this temperature sensitivity. The allowable value determination further accounts for the random errors associated with the relay and M& TE. The allowable value is the sum of these two components. As discussed above , calibration of the relay will be limited to ambient temperatures of between 18.3°C (65°F) to 32.2°C (90°F). This results in a maximum temperature difference of 13. 9°C between calibrations. The temperature coefficient of the relay has also been shown to be 0.0053%/°C. Thus the maximum change in the setpoint due to temperature changes between calibrations is: t.SP = (13.9°C) (0.0053%/°C) = +/-0.074% From Section 6.2.C , the M&TE and relay setting errors were determined to be: I:Rand = +/-0.391 o/o The Allowable Value around the setpoint is the sum of these two components times the Setpoint , or: AV= SP +/-(0.074% + 0.391%)(SP) AV= SP+/- 0.465 % (SP) or , AV= 110.0 +/- 0.5 V The resultant Allowable Value is within the Technical Specification Surveillance Requirement 3.3.5.2 value of~ 109.35 (2187) volts and :,; 113.20 (2264) volts. 6.3 CALCULATION (RELAY TIME DELAY) This section calculates the time delay setpoint and allowable value for the undervoltage relay. A A Wilmar solid state digital timer (Attachment

5) is used to measure the relay time delay. When measuring the time for a change in state of a dry contact in milliseconds , the accuracy of the timer is specified as+/- (0.06% of reading +1 LSD+ 1 msec). For a measurement of 1 second (1 OOOmsec), this results in an accuracy of:

PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-EL EC-VOL T-033 Sheet 14 of 18 Revision 1 E 1imer= +/- (0.0006*(1000) + 1 +1) msec E 1;mer = +/- 2.6 msec To allow flexibility , an error of 34 msec (2 cycles will be used for the timer accuracy. This allows for flexibility in choosing test equipment. E 1;mer = +/- 34 msec 8. The time delay tolerance for the 27N undervoltage relay (Attachment

1) is specified as+/- 10% of setting or+/- 20 m sec , whichever is greater. As no drift data is specified for the time delay , it is assumed that drift is included in this tolerance. For a setting of 650msec (one half way between the Technical Specification min and max allowable value time delay of 0.5 to 0.8 seconds), this corresponds to a tolerance of +/-65 msec , or E re1ay = +/- 65 msec C. For a time delay setpoint setting of 650 msec , a setting tolerance (S i), of +/- 34 msec setting tolerance (S ,) is used. This setting tolerance is selected to be equal to the error associate with the measuring and test equipment.

Based on the setting tolerance and errors associated with the relay and test equipment , the total error of the time delay measurement is determines using SRSS as follows: E 101a1 = +/- (S/ + E 2 relay+ E 2 timer) msec E 101a1 = +/- >/ (0.34 2 + 0.65 2 + 0.34 2) msec E 101a1 = +/- 80.9 msec D. Based on the total error associated with the time delay relay , a setpoint of less than 718.6 (800 -80.9) msec with a setting tolerance of+/- 34 msec provides assurance that the as-found time delay will be less than the analytical limit of 800 msec. The sefpoint is actually chosen as 650 msec to be centered in the range of the Technical Specification values of 500 -800 msec. Thus the time delay setting setpoint is as follows: Setpoint = 650 msec +/- 34 msec E. Allowable Value is defined in Reference 2 consists of the allowance for uncertainties of all elements of the instrument loop including measuring and test equipment. In this application, the allowable value is equal to the total error as determined in item C above. Thus: PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET AV= 650 +/- 80.9 msec EA-ELEC-VOL T-033 Sheet 15 of 18 Revision 1 The resultant Allowable Value is within the Technical Specification Surveillance Requirement 3.3.5.2 value of?: 0.5 seconds and :5 0.8 seconds. PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET

7.0 CONCLUSION

S EA-EL EC-VOL T-033 Sheet 16 of 18 Revision 1 Due to the identical temperature range on all the relays , the identical VT accuracy , the identical relay , and the identical relay sett i ng procedure and equ i pment; all the undervoltage relays can be set at the same voltage setpoint. Based on the methods described in Reference 2 , and the assumptions provided in Section 4 , the following are the recommended settings for the second level undervoltage relays monitoring 2400 volt Switchgear Buses 1 C and 1 D. Setpo i nt = 110.0 + 0.1 Volt (equivalent to 2200 Volts on 2400 volt basis) The re l ay reset is to be set 0.5% above the nomina l setpoint , or: Reset= 110.55 + 0.1 Vol t Setpo i nt Allowable Value 109.5 to 110.5 Volt Time Delay Setpoint = 616 to 684 msec Time Delay Allowable Value = 570 to 730 msec The figure on the following page summarizes the results of the setpoint calculation

PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET 9.0 ATTACHMENTS EA-EL EC-VOL T-033 Sheet 17 of 18 Revision 1 9.1 ABB 27N Instruction Manual , 18 7.4.1.7-7 , Issue E 9.2 Fluke 45 Appendix A Specifications

9.3 Memorandum

of Telephone Conversation between C. Downs of ABB and A. Ashrafi of S&L concerning ABB 27N relay characteristics , Dated 09/04/1994.

9.4 Memorandum

of Telephone Conversation between C. Downs of ABB and H. Ashrafi of S&L concerning effect of temperature on the ABB-27N relays with Harmonic Filter Units , dated 03/30/1992. 9.5 Wilmar Electronics Bulletin SC-101 , " Solid State Digital Timer Specifications." r PALISADES NUCLEAR PLANT ANALYSIS CONTINUATION SHEET EA-ELEC-VOL T-033 Sheet 18 of 18 Revision 1 -------------- ~1h ,r* 1ur 1 lll.93 V !93.28 *. OF 2t.00V 1 REl_f-<'r

,fCK,JP

.------

MA !f'.IUt 1 lll.37 Ii 192.80". OF 24001/, t1j , REL,-.,, DROP OUT z ~r a: llJ .....I D L2 1-*. 1 SP f--t-(!', 0 --------C1.-1f-----r-----1,0Rt ,,..,1 110.55 V ,cJ2.13*_ OF 24001/1 i lC.00 V ,'lJ.,3-*, OF 2-lOOV ' ' w *~ (_l 7 ('t:.v, f}rr,.ct.rlo"' -r I f>"'sof/2.. Single-Phase Voltage Relays IB 7.4.1.7-7 Page 3 2. INSTALLATION Mounting: The outline dimensions and panel drilling and cutout information is given in Fig. 1. Connections: Typical external connections are shown contact logic are shown in Figure 3. polarity. in Figure 2. Internal connections and Control power must be connected in the proper For relays with dual-rated control power: before energizing, withdraw the relay from its case and inspect that the movable link on the lower printed circuit board is in the correct position for the system control voltage. (For units rated 110vdc, the link should be placed in the position marked 125vdc.) These relays have an external resistor wired to terminals and 9 which must be in place for normal operation. The resistor is supplied mounted on the relay. These relays have metal front panels which are connected through printed circuit board runs and connector wiring to a terminal at the rear of the relay case. The terminal is marked "G". In all applications this terminal should be wired to ground. 3. SETTINGS PICKUP The pickup voltage taps identify the voltage level which the relay will cause the output contacts to transfer. DROPOUT The dropout voltage are provided for pickup. taps are identified as a percentage of the pickup voltage. Taps 70%, 80%, 90%, and 99X of pickup, or, 30%, 40%, 50%, and 60% of Note: operating voltage values other than the specific values provided by the taps can be obtained by means of an internal adjustment potentiometer. See section on testing for setting procedure. TIME DIAL The time dial taps are identified as 1 ,2,3,4,5,6. Refer to the time-voltage teristic curves in the Application section. Time dial selection is not provided on relays with an Instantaneous operating characteristic. The time delay may also be varied from that provided by the fixed tap by using the internal calibration ment. 4. OPERATION INDICATORS The types 27N and 59N provide a target indicator that is electronically actuated at the time the output contacts transfer to the trip condition. The target must be manually reset. The target can be reset only if control power is available, AND if the input voltage to the relay returns to the " normal" condition. An led indicator is provided for convenience in testing and calibrating the relay and to give operating personnel information on the status of the relay. See Figure 4 for the operation of this indicator. Units with a "-L" suffix on the catalog number provide a green led to indicate the presence of control power and internal power supply voltage. t ft-t= l" C. -V ..,-, -:> ..J A 1'1Pci,.11r ~r I IB7.4.l.7-7 Page 4 Single-Phase Voltage Relays P t./ 0 f /2. APPLICATION DAJA Single-phase undervoltage relays and overvoltage relays are used to provide a wide range of protective functions, including the protection of motors and generators, and to initiate bus transfer. The type 27N undervoltage relay and type 59N overvoltage relay are designed for those applications where exceptional accuracy, repeatability, and long-term stability are required. Tolerances and repeatability are given in the Ratings section. Remember that the accuracy of the pickup and dropout settings with respect to the printed dial markings is generally not a factor, as these relays are usualli calibrated in the field to tain the particular operating values for the application. At the time of field ibration, the accuracy of the instruments used to set the relays is the important factor. Multiturn internal calibration potentiometers provide means for accurate adjustment of the relay operating points, and allow the difference between pickup and dropout to be set as low as 0.5%. The relays are supplied with instantaneous operating time, or with definite-time delay characteristic. The definite-time units are offered in four time delay ranges: 0.1-1 second, 1-10 seconds, 2-20 seconds or 10-100 seconds. An accurate peak detector is used in the types 27N and 59N. Harmonic distortion in the AC waveform can have a noticible effect on the relay operating point and on measuring instruments used to set th~ relay. An internal harmonic filter is available as an option for those applicaticns where waveform distortion is a factor. The harmonic filter attenuates all harmonics of the 50/60 Hz. input. The relay then basically operates on the fundamental component of the input voltage signal. See figure 5 for the typical filter response curve. To specify the harmonic filter add the suffix "-HF" to the catalog number. Note in the section on ratings that the addition of the harmonic filter does reduce somewhat the repeatability of the relay vs. temperature variation. In applications where waveform distortion is a factor, it may be desirable to operate on the peak voltage. In these cases, the harmonic filter would not be used. Type 27N 59N Pickup Range 60 -110 V 70 -120 V 60 -110 V 100 -150 V CHARACTERISTICS OF COMMON UNITS Time Delay (see note 1 l Dropout Range 70% -99% 70% -99% 30% -60% 70% -99'll. Pickup Inst Inst Inst Inst Inst Inst Inst Inst Inst Inst 1 -10 s 0. 1 -1 s Dropout Inst 1 -10 sec 0.1 -1 sec Inst 1 -10 sec 0.1 -1 sec Inst 1 -1 O sec 0.1 -1 sec Inst Inst Inst Catalog Numbers Std Case Test Case 211T01x5 211T41x5 211T61x5 211T03x5 211T43x5 211T63x5 211T02x5 211T42x5 211T62x5 211U01x5 211U41x5 211U61x5 411T01x5 411T41x5 411T61x5 411T03x5 411T43x5 411T63x5 411T02x5 411T42x5 411T62x5 411U01x5 411U41x5 411U61X5 IMPOKJ'ANT NOTES: l. Units are available with 2-20 second and 10-100 second definite time delay ranges. These units are identified by catalog numbers that have the digit " 5" or "7" directly following the letter "T" in the catalQl! number: i.e.: cataloj!: numbers of the fom1 411 T5xxx has the 2-20 second time delay range and the form 41 lTI/xxx has the 10-100 second time delay range. 2. Each of the listed catalog numbers for the types 27N and 59N contains an

  • x
  • for the control voltage designation. To complete the catalog number, replace the
  • x" with the proper control voltage code digit: 48/125 vdc ...... 7 250 vdc ...... 5 220 vdc ...... 2 48/110 vdc ...... 0 3. To specify the addition of the harmonic filter module , add the suffix "-HF". For example: 411T4175-HF. Harmonic filter not available on type 27N with instantaneous delay timing characterist i c.

Single-Phase Voltage R elays SPECIFICATIONS E~ -c1.*c. -VOL -r-oJJ Re.11 A rrlfCA11£1../n rB 7.4.1.7-7 p 5'"o f /2. Page 5 Input C irc uit: Ratin g: type 27N type 59N 150v maximum continuous. 160v ma xi mum continuous. Burd en: less than 0.5 VA at 120 va c. Frequency: 50/60 Hz. Taps: available models include: Type 27N: pickup -60 , 70, 80, 70 , 80, 90, dropout-60 , 70, 80, 30, 40 , 50, 90, 1 00, 1 1 0 VO 1 ts, 100, 110, 120 vo lts. 90, 99 percent of pi ck up. 60 percent of pi ck up. Type 59N: pickup -100, 110 , 120, 130, 140, 15 0 volts. dropout-60, 70, 80, 90 , 99 percent of p i ckup. Operating Time: See Time-Voltage characteristic curves that follow. Instantaneous models: 3 cycles or less. Reset Time: 27N: less than 2 cycles; 59N: less than 3 cycles. (Type 27N resets when input voltage g oes abo ve pi ckup setting. l (Type 59N resets whe n input v oltage goes below dropout setting.) Output Circuit: Each co nta c t

  • 120 va c @ 125 vdc @ 250 vdc 30 amps. 30 amps. 30 amps. tripping duty. 5 amps. 5 amps. 5 amp s. c ontinuou s. 3 amps. 1 amp. 0.3 amp. brea k, r esistive. 2 amps. 0.3 amp. 0. 1 amp. break, inductive.

Operating Temperature Range: -30 to +70 deg. C. ControJ Power: Models available for Allowable variation: Tolerances: 48/125 vdc o 0.05 A ma x. 48 vdc nominal 38-58 vdc 48/110 vdc o 0.05 A max. 110 vdc 88-125 vdc 220 vdc O 0.05 A ma x. 125 vdc 100-140 vdc 250 vdc o 0.05 A ma x. 220 vdc 176-246 vdc 250 vdc 200-280 vdc (without harmonic filter option, after 10 minute warm-up) Pi cku p and dropout settings with respect to printed d i a l markings (factory calibration) = +/-2%. P ick up and dropout settings , repeatability at constant temperature and constant control voltage=+/-0.1%. (see note below) Pickup and dropout settings, repeatability ove r "al lowable" de control power range: +/-0.1%. (see note below) Pickup and dropout sett i ngs, repeatablility over temperatur e range: -20 to +55oc +/-0.4% -20 to +1ooc +/-0.7% Oto +40°C +/-0.2% (see note below) Note: the three tolerances shown should be considered independent and may be cumulative. Tolerances assume pure sine wave input signal. Time Delay: Instantaneous models: Definite time models: 3 cycles o r less. +/-10 percent or +/-20 millise c s. whichever is greater. Harmonic Filter: (optional) All ratings are the same except: Pickup and dropout settings, repeatability over temperature range: o to +55oc +/-o.75% -20 to +1ooc +/-1.5% +10 to +400C +/-0.40% Dielectric Strength: 2000 vac, 50/60 Hz., 60 seconds, all circuits to ground. Seismic Capability: More than 69 ZPA biaxial broadband multifrequency vibration without damage or malfunct i on. (ANSI C37.98-1978) IB 7.4.1.7-7 Page 6 Single-Phase Voltage Relays ___ Q. __ _ FRONT VIEW (4) .212 O IA HOLES 9.56 PANEL CU TOU T SIDE VIEW 87664311 RI OG DIMENS I ON S ARE l~tH STUD NUMBERS (BAC K VIEW) Figure 1: Relay Outline and Panel Drilling 52 .I.)._ I I, 11 Js.U~ ! CDNTADL 1 2 PDI-IER Si! I' ~Q Figure 2: Typical External Connections r=A-ct.Ec-v 1'" 1 -o:::, .::> -/+ r-r1tc /11'1 £ 1./i I p C o .f i2.. r + CONTROL F'OHER SOURCE l 1-,-. -----~-0 .::,.;,, ,-._c..,, It 1"f It<: HH £ JJ-r I Single-Phase Voltage Relays IB 7 . 4 . 1 . 7 -7 p 7 f /2.. Page 7 Figure 3: INTERNAL CONNECTION DIAGRAM AND OUTPUT CONTACT LOGIC The following table and diagram define the output contact states under all possible conditions of the measured input voltage and the control power supply. "AS SHOWN" means that the contacts are in the state shown on the i nternal connection diagram for the re 1 ay being considered. " TRANSFERRED means the contacts are in the oppos ite state to that shown on the internal connection d iagram. Input Voltage Condition Contact State Normal Control Power AC Input Voltage Below Setting Normal Control Power AC Input Voltage Above Setting No Control Voltage + J.6D211H Type 27N Transferred As Shown As Shown Std, or T*st Cas* E X TERNAL ffC5 1 5iTDR 5UPPL l[O HITl1 "-ILAY , Pi ckup Voltage L evel Dropout Voltage Level Inpu t Voltage Decreasing Type 59N As Shown Transferred As Shown Figure 4a: ITE-27N Ope rat i on of Dropout Indicating Light Figure 4b: I TE-59N Ope rat ion of Pickup lndi~ati ng Light Figure 4: Operation of Pickup/Dropout Light-Emitting-Diode Indicator j::"'4 .... CL.-C<.... -v1J1,,1-'-'*"" .:> ""-""' , IB 7.4.1.7-7 Page 8 Single-Phase Voltage Relays 1+-rrP1c~He.µt-I /> 0 f-/'2... l ' > i ! .. " A ;; 0 ... * !! * ! 0 z I.Z 1.0 ... o., *.. 0.2 TIME VOLTAGE CHARACTERISTICS T ypo 59N OVERVOLTAGE RELAY DEFINITE TIME TUii TAPS 3 o '--4~-, .... ----,1 .... 1 ___ u:':----,1':.,---:', .* -=--~u " 100 80 80 40 20 0 ..... TW't..!.S of l"IC:klP TAP SET11NO

  • SH()jllT TlME Cataloo Sa,.1** 2t1Ut*** and *1 1uhu TI"'E OE.LA Y AS ~N NE O tUM TIME Cata 1 ot s.r-1., 2: 1, u,hx.ic: land 4 11 U4 a:J01i MULTl,LY TIME OEl.A l' SHOWN I Y 10 I TVCIOSl2t
  • "OT TO IXCIID tNPU'f **Tn .. \ 1 yplca \ I ' I \ \ \ \ r,-...__ 3 0 eo 120 180 F****ncy -Hertz TIME VOLTAGE CHARACTERISTICS TYPE 27N UNDEAVOLTAG E RELAY DEF I N I TE TIME , .* .----,-----,----,----r-----r---, T Iit, TAP'$ 1.01---+----+----+---+---" ....... t----1 : 0.1 :
  • 0 , 1 f----t----+---t---t----t-----;

< .J .. 0 .. ::I ' o., f----+----+- --li-----+----+----t o.z 1---+----t---1----1-----t----1

  • '---~--~--~---~--~---

0 0.2 0.4 O.t Q.I 1.0 U: YUL TIPL.ES or OROP,OUT l!lT I NO SMOAT Tt>4E Catal o 9 Set'i e, 21lfh:u *ncl 411T6 KXX TlME 01:U V A.$ SHOwH 1'4£01\JH TtHE Cat.a lot ,.r1 ** Z1 tT*u .. and ., IT4au NULTIPI.Y TU,41; OEl,l Y SHOWN IY 10 ""'"'11.1 ... I I TVCtll ..... 300 The time-voltage characteristic is definite-time as shown above. The time-delay values verses time-dial selection for the 2-20 sec. and the 10-100 sec. definite time models are as follows: Time Dial Tap Pin Position # I #2 #3 #4 #5 #6 Nominal Delay Time (sec) 411T5xxx 411T7xxx 2 seconds 4 6 10 14 20 10 seconds 20 30 50 70 100 Figure 6: Normalized Frequency Response -Optional Harmonic Filter Module Control Voltage Selector Plug +J 0 a. C 0 +J Q) <-< >. 0 <

  • I-Single-Phase Voltage Relays i !:: ,~ C.. ,-_c...-.. -. /t7TltC/fM eµf /> '/ of /2.., IB 7.4.1.7-7 Page 9 Pickup / Voltage Calibration Pot. 27N: CCW to Iner. 59N: CW to Iner. Dropout Voltage Calibration Pot. ccw to Iner. Figure 6: Typical Circuit Board Layouts, types 27N and 59N Figure 7: Typical Circuit Board Layout -Harmonic Filter Module 18 7.4.1.7-7 Page 10 Single-Phase Voltage Relays TESTING 1. MAINTENANCE ANO RENEWAL PARTS t;R-c.Lt(*V"'-1 VJ) "'"-" I A-Tf ttc/1-l't E ,_,, I p )0 0 f i2... No routine maintenance is required on these relays. Follow test instructions to verify that the relay is in proper working order. We recommend that an inoperative relay be returned to the factory for repair; however, a circuit description booklet CD7.4.1 .7-7 which includes schematic diagrams, can be provided on request. Renewal parts will be quoted by the factory on request. 211 Series Units Drawout circuit boards of the same catalog number are interchangible.

A unit is identified by the catalog number stamped on the front panel and a serial number stamped on the bottom side of the drawout circuit board. The board is removed by using the metal pull knobs on the front panel. Removing the board with the unit in service may cause an undesired operation. An 18 point extender board (cat 200X0018) is available for use in troubleshooting and calibration of the relay. 411 Series Units Metal handles provide leverage to withdraw the relay assembly from the case. Removing the unit in an application that uses a normally closed contact will cause an operation. The assembly is ident~fied by the catalog number stamped on the front panel and a serial number stamped on the bottom of the circuit board. Test connections are readily made to the drawout relay unit by using standard banana plug leads at the rear vertical circuit board. This rear board is marked for easier identification of the connection points. Impprtant: these relays have an external resistor mounted on rear terminals 1 and 9. In order to test the drawout unit an equivilent resistor must be connected to terminals 1 & 9 on the rear vertical circuit board of the drawout unit. The resistance value must be the same as the resistor used on the relay. A 25 or 50 watt resistor will be sufficient for testing. If no resistor is available, the resistor assembly mounted on the relay case could be removed and used. If the resistor From the case is used, be sure to remount it on the case at the conclusion of testing. Test Plug: A test plug assembly, catalog number 4DDX0002 is available for use with the 410 series units. This device plugs into the relay case on the switchboard and allows access to all external circuits wired to the case. See Instruction Book IB 7.7.1.7-8 for details on the use of this device. 2. HIGH POTENTIAL TESTS High potential tests are not recommended. A hi-pot test was performed at the factory before shipping. If a control wiring insulation test is required, partially withdraw the relay unit from its case sufficient to break the rear connections before applying the test voltage. 3. BUILT-IN TEST FUNCTION Be sure to take all necessary precautions if the tests are run with the main circuit energized. The built-in test is provided as a convenient functional test of the relay and iated circuit. When you depress the button labelled TRIP, the measuring and timing circuits of the relay are actuated. When the relay times out, the output contacts transfer to trip the circuit breaker or other associated circuitry, and the target is displayed. The test button must be held down continuously until operation is obtained. Single-Phase Voltage Relays 4. ACCEPTANCE TESTS CM"'l-"-.... --v-... , --~..J A71P,C/111E.~ ( t II o+ 12-IB 7 .. 1.7-7 Page 11 Follow the test procedures under paragraph

5. For definite-t i me units, select Time Dial i3. For the type 27N, check timing by dropping the voltage to 50% of the dropout voltage set (or to zero volts if preferred for simplification of the test). For the type 59N check timing by switching the voltage to 105% of pickup (do not exceed max. input voltage rating.) Tolerances should be within those shown on page 5. If the settings required for the particular application are known, use the procedures in paragraph 5 to make the final adjustments.
5. CALIBRATION TESTS Test Connections and Test Sources: Typical test circuit connections are shown in Figure 8. Connect the relay to a proper source of de control voltage to match its nameplate rating (and internal plug setting for dual-rated units). Generally the types 27N and 59N are used in tions where high accuracy is required.

The ac test source must be stable and free of harmon i cs. A test source with less than 0.3% harmonic distortion, such as a corrector" is recommended. Do not use a voltage source that employs a ferroresonant transformer as the stabilizing and regulating device, as these usually have high harmonic content in their output. The accuracy of the voltage measuring instruments used must also be considered when calibrating these relays. If the resolution of the ac test source adjustment arrangement using two variable transformers shown in "fine" adjustments is recommended. means is Figure 9 not adequate, the to give "coarse" and When adjusting the ac test source do not exceed the maximum input voltage rating of the re lay. LED Indicator: A light emitting diode is provided the pickup and dropout voltages. level and the direction of voltage Figur;e 4. on the front panel for convenience in determining The action of the indicator depends on the voltage change, and is best explained by referring to The calibration potentiometers mentioned in the following procedures are of the multi-turn type for excellent resolution and ease of setting. For catalog series 211 units, the 18 point extender board provides easier access to the calibration pots. If desired, the calibration potentiometers can be resealed with a drop of nail polish at the completion of the calibration procedure. Setting Pi c kup and Dropout Voltages: Pickup may be varied between the fixed taps by adjusting the pickup calibration potentiometer R27. Pickup should be set first, with the dropout tap set at 99% (60% on "low dropout units"). Set the pickup tap to the nearest value to the desired setting. The calibration potentiometer has approximately a +/-5~ range. Decrease the voltage until dropout occurs, then check pickup by increasing the voltage. adjust and rep e at until pickup occurs at precisely the desired voltage. Potentiometer R16 is provided to adjust dropout. Set the dropout tap to the next lower tap to the desired value. Increase the input voltage to above pickup, and then lower the voltage until dropout occurs. Readjust R16 and repeat unt i l the required setting has been made. Setting Time Delay: Similarly, the time delay may be adjusted higher or lower than the values shown on the time-voltage curves by means of the time delay calibrat i on potentiometer R41. On the type 27N, time delay is initiated when the voltage drops from above the pickup value to below the dropout value. On the type 59N, timing is initiated when the voltage increases from below dropout to above the pickup value. Referring to Fig. 4, the relay is "timing out" when the led indicator is lighted. E~ternal Re§i§tor Val~es: The following resistor values may be used when testing 411 series units. Connect to rear connection points 1 & 9. Relays rated 48/125 vdc: 4000 ohms; (-HF models with harmonic filter 4000 ohms) 48/110 vdc 4000 ohms; (-HF models with harmonic filter 3200 ohms) 250 vdc 10000 ohms; (-HF models with harmonic filter 9000 ohms) 220 vdc 10000 ohms; (-HF models with harmonic filter 9000 ohms) Jl **** ,., .*.* ABB Power T&D Company, Inc. Protective Relay Div i sion 7036 North Snowdrift Road Allentown, PA 18106 DC Control Source {-} (+} 8 7 Q6 Q5 GNO Q16 z X ' :~v I 9 To Timer STOP Input Figure 8: Typical Test Connections 1;.A-{LE.G-i.J.:>Lr-O:$} ~e v / f} rf Acrft1 *µ'I I jJ/2.oflZ.. Issue E (5/96) Supersedes Issue D To AC Test Source See Fig. 9 Timer START Input T1, T2 T3 Variable Autotransformers Filament Transformer Accurate AC Voltmeter (1.5 amp rating) (1 amp secondary) 120 VAC LIN[ V LIN[ CORRECTOR (1 KVA) X Tl COARSE T2 FIN[ T3 Figure 9: AC Test Source Arrangement

v These instructions do not purport to cover all details or variations in equipment , nor to provide for every possible contingency to be met in conjunction with installation, operation, or maintenance. Should particular problems arise which are not covered sufficiently for the purchaser's purposes, the matter should be referred to ABB.

el!*r.LEC.. -t1il1"-os] t?ev I fo"f1RcHMEµr Z. p I of-3 Appendix A Specifications Introduction Appendix A contains the specifications of the Fluke 45 Dual Display Multimeter. These specifications assume:

  • A l-year calibration cycle
  • An operating temperature of 18 °C to 28 °C (64.4 °F to 82.4 °F)
  • Relative humidity not excee din g 90 % (non-condensing)

(70 % for 1,000 kQ range Accuracy is expressed as +(per centage of reading+ digits). Display Counts and Reading Rates Rate Readings per Second Full Range Display Counts Slow 2.5 99 , 999* Medium 5 30 , 000 Fast 20 3,000

  • Ohms full range will typically be 98,000 counts RS-232 and IEEE-488 Reading Transfer Rates Reading Per Second Rate Internal Trigger Internal Trigger Operation Print Mode Operation Operation (TRIGGER 1) (TRIGGER 4) (Print set at 1) Slow 2.5 1.5 2.5 Medium 4.5 2.4 5.0 Fast 4.5 3.8 13.5 Response Times Refer to Section 4 for detailed information.

A-1 45 ell-£L£C -110 t..1 -0 :i /C ev ( firf1tcf/t1E1./( 2. I~ o.f 3 Users Manual DC Vo lt age Range Reso l ution Accu ra cy Slow Medium Fast (6 Months) 300 mV -10µV 1 00 µV 002 % +2 3V -100 µV 1 mV 0.02 % +2 30 V -1 mV 10 m V 0.02 % +2 300 V -10 m V 1 0 0 m V 0.02%+2 100 0 V -10 0 mV 1 V 0.02 % +2 100 mV 1 µV --0.02 % +6 1 000 m V 10 µV --0.0 2 % +6 1 0 V 100µV --0.02%+6 100 V 1 mV --0.02 % + 6 1000 V 1 0 m V --0.02 % + 6 Input Impedance 10 M O in p aralle l wi t h <1 00 pF Not e I n t h e dual display mode, when th e volts ac and volts de fun c t i ons ar e s e le c t e d, th e 10 M .Q d e input di v id e r is in parall e l w ith th e 1 M Q a c di v ider. Normal Mode Rejection Ratio >8 0 dB a t 50 H z or 60 Hz, s l ow an d medi u m ra t es >5 4 dB for fr eq uencies between 50-440 H z , s l ow an d med ium rates >60 d B at 50 H z, fa s t rate (Note: Fa s t rate has no fi l tering) (1 Year) 0.02 5 % + 2 0.025 % + 2 0.025 % + 2 0.025 % + 2 0.025 % + 2 0.025 % + 6 0.025 % + 6 0.025 % + 6 0.025 % + 6 0.025 % + 6 Maximum Allowable AC Voltage While Measuring DC Voltage or (AC+ DC) Voltages Range Max Allowable Peak AC Peak Normal Mode Signal Voltage NMRR* >80 dBt NMRR >60 dBt 300 m V 100 mV 1 5 V 15 V 15 V 3V 1000 mV 15 V 15 V 15 V 30V 1 0 V 1 000 V 50V 300V 300V 1 00 V 1 0 00 V 50V 300 V 1000 V 1000 V 1000 V 200 V 1000 V

  • NMRR is the Normal Mod e Re j e c t i o n Ra tio t Normal Mo de R ejec t i on R ati o at 50 Hz o r 6 0 H z +/-0.1 % Commo.n Mode Rejection Ratio >90 dB a t do , 5 0 or 6 0 H z , ( l k O u nba l anced , medium and s l ow ra t es)

.), Maximum Input I OOOV de or peak ac on any range True RMS AC Voltage, AC-Coupled Resolution R a nge Slow Medium Fast 300 mV 10 µV 100 µV 3V 100µV 1 mV 30V 1 mv 10 mV 300 V 10 mV 100 mV 750 V 100 mV 1 V 100 mV 1 µV 1000 mV 10 µV 10 V 100 µV 100 V 1 mV 750V 10 mV Accuracy Jt Linear Accuracy dB Accuracy Frequency Power* Slow Medium Fast Slow/Med Fast 20-50 Hz 1 % + 100 1 %+ 10 7%+2 0.15 0.72 2 %+ 10 50 Hz-10 kHz 0.2 % + 100 0.2%+10 0.5 % + 2 0.08 0.17 0.4%+10 10-20 kHz 0.5 % + 100 0.5 % + 10 0.5 % +2 0.11 0.17 1 % + 10 20-50 kHz 2 % + 200 2%+20 2%+3 0.29 0.34 4 %+2 0 50-100 kHz 5 % + 500 5 %+5 0 5%+6 0.70 0.78 10 % + 50

  • Error in power mode will not exceed twice the linear accuracy specification Accuracy specifications apply within the fo llowin g limits, based on reading rate: Slo w Reading R a te: Between 15 ,00 0 and 99,999 count s (full range) Medium Readin g R a te: Between 1 , 500 and 3 0 , 000 c ounts (full range) Fast Readin g Rate: Between 150 and 3,000 counts (full range) Decibel Resolution Resolution Slow & Medium Fast 0.01 dB 0.1 dB £1+-t.lE.C-/)()Lr -u3 3 h V I A F1Aclv-r e ""T 2 P '3 o-f 3 Appendices A Specifica lions Max Input at Upper Freq 750V 750 V 750V 400 V 200V A-3 Efr-Et..E.C, I/OL.7-033

-;;-..

  • f(-1'1 fr C /.f 11 E. A.I'/ S * .!_) .,_...,. ....... _.._ ..................

._. ..... _. .... f.lofl BULLETIN SC-101 GENERAL DESCRIPTION The Model SC-101 Solid State D igit al Timer is a precision instrument for cording elapsed time in units of cycles, milliseconds, and seconds. It was developed primarily to rately measure and calibrate various switching devices such as protective lays, circuit breakers, and contactors. * -1 .. ,.:ti=o.,.

  • t 01, .....,o.,...

"' 0* A( Oh ., ... ., *01. SPECIFICATIONS INPUT POWER: 120volts :t 10%. 50/60 Hz. 0.1 amp. LOCK: TEMP. RANGE: RANGES: START &STOP MODES: o*cto50°C. (1) Cycles (2) Milliseconds (3) Seconds 0-999.99 0-99999 0-999.99 .. (1) Dry contacts, NO or NC (2) DC potential, OFF or ON 2.0 to 300VAC (3) AC potential, OFF or ON 1 s:; tn ~nnvAr. POWER: FUSE: -...... .. 1.1-.. ** . -** i. * .... *** . -.:~~ """~ ......... . Ht01if*t ... ... Oc-** * *~, . ._u=*o" ..... ,o~._ AC** AC OU .. *~ .... . ,, °"' "'OCL.1 ... ..... (1) Position OFF -Allows timing to CQmmence from any start morlP. Mrl hA stopped when the start mode is reversed. (2) Position ON -Allows timing to commence from any start mode and be stopped only by the stop input. / OFF -ON switch supplies 120VAC power to unit. 1' Input power fuse, 1 /8 A SB. ~CCU RACY: (1) DryContacts

+/- 1 milliseco:Dd. (2) DC Voltage: +/- 1 millisecond (3) AC Voltage: :t 1,4 cycle ENCLOSURE:

Attractive formica carry i ng case with a removable hinged cover. DISPLAY: id State. 5 digits. 0.3 Inches high. RESET: Pushbutton, resets the display. SIZE & WEIGHT: LINE CORD: 101/z" x 71/2" x 6", 7 pounds. Provided with a 6 foot 120VAC lin.e cord conveniently stored inside top cover. *1. The "cl ock" and "read-out tolerances listed below must be added in computing the overall accuracy: a e internal clock-tt!fe nee, over a tempe ange O -0 , IS -. o. ove accuracies are ss s1 nc 2. voltage accuracy given is the worst case at low voltages and Improves wi

  • h i gh voltage. ' =-~-~~'-~~~E __ \~,121;~~~

March 1960 .. -*~ -~*,, ,.,. 2430 AMSLER STREET TORRANCE, CALIFORNIA 90505 11f'... l' El 1 ' , jl) ~*3 : 28 5 1?7881 72 4 PAGE.02 \}}

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