ML18114A715

Electrical Load Analysis for 480 Volt Emergency Power Sys.

ML18114A715
Person / Time
Site:	Surry
Issue date:	05/17/1979
From:	VIRGINIA POWER (VIRGINIA ELECTRIC & POWER CO.)
To:
Shared Package
ML18114A714	List: ML18114A713 ML18114A715 ML19268B827
References
NUDOCS 7906210216
Download: ML18114A715 (42)

Text

{{#Wiki_filter:* ELECTRICAL LOAD ANALYSIS FOR 480 VOLT EHERGENCY POWER SYSTEH SURRY Pm..'ER STATION UNITS 1 AND 2 DOCKET NOS. 50-280 50-281 LICENSE NOS. DPR-32 DPR-37 1

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ISSUED: Hay 17, 1979 - I'

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               , 79062102llo VIRGINIA ELECTRIC AND POWER COMPANY

I , e INDEX

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1.0 System Description

2.0 Load Tabulation 3.0 Voltage Analysis; 480 Volt Safety Buses 4.0 Feeder Cables to New Load Centers lHl and lJl Appendix A 4kv Safety Bus Voltage Profiles Appendix B Tabulation of Loads i [

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1.0 Svstem Descriotion Reference attached Sketch 12846,23-EKS-2-2. A 480V load center will be added to each train of the emergency pouer system. The equipment used '\,/ill be Class IE load centers purchased for North Anna

   *units J and 4 and transferred.from storage there. The load center transformer primaries will be connected in parallel with the primaries of the existing load center transformers to the 4160V feed breakers presently in use. Feeder cables to the existing motor control centers (i.e., two per load center) will be disconnected from the existing load centers and connected to the new load center
   ~f the associated train of emergency power. The new load centers will be located in the associated train emerGency switchgear room near the existing 480V load centers.

61'0..... STONE & WfBSTER ENGINEERING C O R P 0 ~ ~ ! 9 : : . . : N ' - - - - - - - - - - - - - - - - I l\.\1f1HI

                                                                                                                                                         "--------'f"ff---~--,

T 1-.tl,Kv/48o'f' 1000/133:,XV/I T. 4.tU::V j-J,-0ov 1000/ 1333.K'IA

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                                                                                                            '2000 A eKR T

4.1(.,KI/ /4!3o'I

                                                                                                                                                            /ooo/t!J'33kV!l                          T.
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4.1(.K'I / 4Bov' 1000/13:,3.-:v,1 __ ?ooo A SKR wr.1-1 1G.oof) l~OO~ \4JI 2.ooo") 14JII ,f:w co\L fr.<<,).) 14.JI Zooo}.,) /'IH/5" °lf(I\> C.OI\.

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48o'I J Et'\ER'. Bl>$ IJ f 48cv l EMER 6llS lJ-1 -<;48o'I/ j EPIERfB\)5 I~ 48o'I/ Et'\c.R! -e.us. 11-1-1 T l i>ooA) 14J(., tlJcl.9 14J10 6()()/J )14Jt6 ~cc,)) 14J14 I woA) 14-iH, w"-v~ 141110 ~ . 6oc-A) 1-/H 14 f) 6<<,1 14H 13

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N<>TES u) EX\-OT1"1.9 C>-.BLE.S \.l!c.f'L\ 1 1\-\~PL\ 1 IJIOf"LI 1

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QA. CAT. -.C SCALE: NOi-ie O.>.TE: 41~1,1 APPHOVCO S~ETCH NUP.lfli::R

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2.0 Load Tabulation To calculate bus load in es accurately :.nd conservatively, the follo1,1ing

   *guidelines were established:

a. All loads which cycle under *,utomatic control (sump pump, air compress0rs, etc.) were assumed running when analyzing a bus. This approach is highly conservative since it does not consider load duty cycling or diversity factor.

b. Where available, driven equipment brake-horsepower was used for load tabulation. If brake-horsepower was not available, motor nafileplate horsepo,rer .1.\2s .u,..,.,...-1.

                                           - .    *:

c. Where the control roo::iL.)(i,.: _;:* ha::; a choice of equipment providing redundant services, (i.e., *c:-ntrol room chillers) it \!as assu:;1ed tha:

the equipment connected to the bus under analysis i-las in service*.

d. All motor-operated valves on these buses were considered short-term loads of relatively low demand. The majority of t~1ese valves have operating times of less than JO seconds. They were not listed as continuous load on the bus.

e. The breaker trip points were determined from the time vs. current trip characteristic curves for *the device. Because of manufactJ.:cing tolerances, this curve is a b::..nd. The lm.;er bound of this band \Jas used to c.etermine the earliest possiblG time at which the breaker coi.:.ld trip.

f. Loads were ass'..lmed as constant kva when cor.iputL>i[ vol t&.ge pr0fi2.es.

             ;.ppe:i:.ix B is :.he tabulation of safety-related ::-.J t-or control center             - l

loadings. Each load on the 48CV emergency bus was a.lsc !'evie\rnd with station opera ting SU?en*isors to establish which are c:mnGcted for va:::-ious plan:. conditions. This review established which loaC:s ran '.)nly for refueline or were started by manu2l control (such as hydrogen recombiner). In addition, some loads were determin8d to be autor:iatically shed by a consec;:.1.ence lirni ting safeguard ( CLS) signal. Data: Load Center lHl ITE 480V metal-clad unit substation, indoor-type.

1. Incoming Section: 5KV air disconnect switch with key interlock.

2. Transformer: 4,160V primary delta, 480V secondary delta, with i 4 - 2 1/2% taps belO\, rated voltage on prir.iary. Impedance: 8% on II 1,000 kva base transformer rated 1,000 kvo. self-cooled, 1,333 kva fan cooled (fans installed); dry type ventilated. l i

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3. Switchgear: Two vertical sect.ions with seven breaker compart-ments end oae instrument compartment. 480V bus throat connected to trans forr.wr.

4, Breakers: ITE K600 series with K2000 (2,000 amp) incoming line breaker~ Load center lJl is the same as lHl except in place of Skv air discon-nect switch, Load center.lJl has a Skv air termination chamber (no switch). The two new load centers, lHl and lJl, will each feed two safety re-lated motor control centers (MCCs). The MCCs are the only loads on these new buses. The maximum loading on the load centers, as a result of the HCCs which* occurs for a loss of coolant accident (LOCA), is summarized below: LOCA Loading (Hax) Load Center lHl HCC lHl-1 384 kva MCC lHl-2 275 kva Total: 659 kva Load Center lJl MCC lJl-1 368 kva MCC lJl-2 367 kva

                                  ~:)                                         , I

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Total: = 735 kva

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The new load -centers are rated 1000/1333 kva where the 1333 kva is a I fan-cooled rating. The maximum loadj.,_g on lHl is 49% of load center fan-cooled rating. The maximum loading of lJl is 55% of loc!d center I fan-cooled rating. Summary: 480V load centers lHl and lJl are within design rated capacity for all station operating c~nditions. 2.2 Original 480V - Loa~ Centers lH and lJ Data: Load Center lH and lJ ITE 480V metal~clad unit substation, indoor type.

l. Incoming Section:

• Skv air termination chamber.

2. Transformer: 4160V primary delta; 480V secondary delta with 1-2%%

tap above rated and 3-2\% taps below rated voltage on primary. Impedance: 8% on 1000 kva base transformer rated 1000 kvn self-cooled, 1333 kva fan-cooled (fans installed); dry type ventilated.

3. Switchgear: Two vertical sections with seven breaker compartments

and one instrument compartment. l+SOV bus thro~1t connected to trans fon.:.cr.

4. Breaker: ITE K600 series with K1600 (1600 amp) incoming line breaker.

Loading on the original 480V load centers lH and lJ is reduced by trans-ferring feeders for two MCCs from lll an<l lJ to the new lor;d centers. Load center power rerinirements .rre outU ned on tabulation of loads sheets 1 and 2, attached. From the totals on tabulation sheets 1 and 2, the maximum connected ~oads on buses lH and lJ would occur during a LOCA. This maximum land represents: 1002 kva/1333 kva, or 75.2% of bus lH capacity 1002 kve/1333 kva, or 75.2% of bus lJ capacity Although pressurizer heaters trip on low pressurizer level, it is pos-sible to re-energize them without exceeding ratings of load centers. With pressurizer heaters on during a LOCA, bus lH would be 9l,% loaded and bus lJ would be 90% loaded. Summary: 480V load centers lH and lJ are within design rated capacity for all station operating conditions.

480V UNIT SUBSTATION "HI" TABULATION OF LOADS - SHEET 1 MODIFIED SYSTEM BREAKER UNIT SUBSTATION 1H *10CA NO. DESCRIPTION OF LOAD W/LOOP LOOP NORMAL 14Hl Incoming Line, 1600A 14H2 Pressurizer Heater; 250 Kw (2) 250 250 l.LiJI3 LHSI Pp, 1-SI-P-lA; 250 Hp 223 14H4 Inside Recirc Spray Pp, 1-RS-P-lA; 300 Hp 277 14H5 Containment Spray Pp, 1-CS-F-lA; 250 Hp 225 14H6 Spare

          .

14H7 Outside Recirc Spray Pp, l-RS-P-2A; 300 Hp 277 14H8 Containment Recirc Fan, 1-VS-F-lA; 125 Hp (1) 118 118 14H9 Future l4Hl0 Spare  :.. TOTALS :i.,002 368 368 (1) Trips OlJ. receipt of SIS signa.l. (2) Trips on low pressurizer level. (3) Normal load by field measurement. (4) Abbreviations for Unit conditions: LOCA Loss of Coolant Accident LOOP - Loss of Offsite Power NORMAL - Normal Unit Operation, 100% Po"Wer

480V UNIT SUBSTATION 11 1J" TABULATION OF LOADS - SHEET 2 MODIFIED SYST~-f BREAKER UNIT SUBSTATION lJ LOCA NO. DESCRIPTION OF LOAD W/LOOP LOOP NORV.LAL 14Jl Incoming Line, 1600A 14J2 Spare 14J3 LHSI Pp, 1-SI-P-lB; 250 Hp 223 14J4 Inside Recirc Spray Pp, 1-RS-P-lB; JOO Hp 277 14J5 Containment Spray Pp, 1-CS-P-lB, 250 Hp 225 l4J6 Spare 14J7 Outside Recirc Spray Pp, l--RS-P-23; 300 Hp 277 l4J8 Containment Recirc Fan, 1-VS-F-lB; 125 Hp (1) 118 118 14J9 Pressurizer Heater, 200Kw (2) 200 200 14Jl0 Spare TOTALS 1,002 318 318 (1) Trips on receipt of SIS si 5rnaJ.* (2) Trips .on low pressurizer level. (3) Abbreviations for Unit conditions: LOCA Loss of Coolant Accident LOOP - Loss of Offsite Power NORMAL - Normal Unit operation, 100% power

3.0 Voltage Analysis; 480 Volt Safotv Buses The fol lowing vol tagP. range was calculated for the 4KV safety buses lH and lJ 1 which feed the 480V safety related load centers. The calculations are included in Appendex A and the results are included below: Voltage levels are on a 4000 volt base. I* 4KV safety bus lH; min1.mum = 1.0105 p.u. maximum = 1.0961 p.u. 4KV safety bus lJ; minimum = 0.9865 p.u. maximum = 1.0910 p.u. Using the load tabulations of section 2.0 1 the following voltage profiles for 480 volt safety bus H and. J were calculated for maximum and minimum 4KV

        . bus levels:

1. Voltage profiles for maximum steady state loading on 4.sov buses lH 1 lJs lHl and lJl.

2. Voltage profile for starting the largest safety related 300 HP motor on buses lH and 1J while bus is at maximum load.

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3. Light load voltage profile for 480V buses llls lHls lJ, lJl using highest voltages on the 4 '!..V input buses.

The calculations examine the hi~hest gr.id voltage with light loading of tl.e buses and the lowest grid voltc?ge with the heaviest loadiqg of these buses. These two conditions bound the bus voltage range for the load centers. If the motor voltage remains within equipment design range at these bounds then it remains within this design range for all voltages. 3.1 Program Data Calculations were run on Stone & Webster program 6995 - Station Service System Calculations; Input Data Sheet 11. This program is used to determine running (steady state) motor voltage and motor starting voltage for any chosen load center primary voltage.

Data; a) Safety related motors for Surry power station were speci-fied and purchased with 70% starting nameplate voltage. b) Motor nameplate is 460 volts. c) Design operating range of equipment is 460 volts+ 10%. d) Load centers transformers are 1000/1333 KVAs 4160V 480V. Primary tap at 4056 volts. e) Load center transformers impedance is 8% on 1000 KVA. f) Review of manufacturers motor data on motors fed from the 4BOV load centers indicates starting power factors of 0.26 and above. A power factor of 0.25 was used for motor starting calculations. g) Locked rotor current for motor starting was taken from motor data. h) MVA minimum short circuit available at transforraer primary was calculated on data sheet 5s runs 1401 and 1403s included in Appendix A. 3.2 Voltage Prcfile - Maximum Steady State Bus Loading The voltage profiles for maximum bus loading were computPd as outlined below. For each runs motor running voltage was computed for* the maximum and minimum* grid voltage conditions computed in Appendix A. Grid low voltage (on 36.5 KV bus) will g;.ve lowest motor running voltage. Haxir.um loading. for buses is given in Section 2.0. 3.2.1 RLn No. 1405 - 480V Bus lJ - maximum loading Grid low - motor running voltage = 92.86% of 460V Diesel feed - motor running voltage = 98.74% of l+60V 3.2.2 Run No. 1407 - 480V .Bus lJl - maximum loading Grid low - motor running voltage = 94.60% of 460V Diesel faed - motor running voltage = 100 .36% of 460V

3.2.3 Run No. 1409 - 480V Bus 1H - maximum loading Grid low - motor. running voltage = 95. 51% of 460V Diesel feed'"" motor running voltage = 98.74% of 460V 3.2.4 *Run No. 1411 - 480V Bus lHl - maximum loading Grid low - motor running voltage = 97.65% of 460V Diesel feed - motor running voltage = 100.80% of 460V 3.3 Voltage Profile - Motor Starting All large 480V safety related motors are fed from load centers lH and lJ. Maximum loading on these switchgears occurs during Safety In-

       . jection (LOCA) conditions. Worst voltage starting condition is starting the last motor with the load center at maximum load. This motors the largest on the buss would be the 300 HP outside Recircu-lation Pump Hotor which starts 5 minutes after containment hi-hi pressure signal. If this motor starting voltage remains above 70% of nameplates then all other motors on this load center will have a min-imum of 70% st~rting voltage.

3.3.1 Run No *. 1406 - Load Center lJ - starting 300 HP l-RS-P-2B Motor leads impedance from cable schedule data is 0.0127 + j 0.113 ohms/phase Nominal switchyard -motor starting voltage -75.07% of 460V Grid low -motor starting voltage -73.68% of 460V Diesel feed -motor starting voltage -78.17% of 460V 3.3,2 ~un No. 1410 - Load Center lH - starting 300 HP l-RS-P-2A Motor leads impedance from cable schedule data is 0.0092 + j 0.0090 ohms.phase Nominal switchyard -motor starting voltage -78.65% of 460V Grid low -motor starting voltage -V(7."B(!J% o £ 460V Diesel feed . -motor starting voltage -79.72% of 460V

• 3.4 Light Load Analysis - Voltage Profile Highest voltage seen at 480V load centers would occur at load center light loadings Reserve Station Service transformer light 1.oadir:gs and switchyard grid high voltage.

From Appendix As calculation Runs 1401 and 1403 s light loading voltages at high grid are as follows: 4KV Bus lJ light load = 1. 0910 p.u. @ 460V 4KV Bus lH light load = 1.0961 p.u. @ 460V 3.4.1 Run No. 1408 - Light Load 480V - Load Centers lJ and lJl Minimum loading condition on buses is conservatively estimated as 100 KVA. Grid high -light load motor running voltage= 109.16% Diesel feed -light load motor running voltage= 103.89%

   -3.4.2            Run No. 1412 - Ligl:rr Load 480V - Load :enters 1H and llll Minimum loading condition on ~uses is conservatively estimated as 100 KVA.

Grid high -light load motor running voltage = 109. 69% . Diesel feed -light loaci - motor running voltage= 103.89% 3.5 Summary of Voltage Calculations The 480V safety load center voltage remains within the eq-:J.ipment design range of

   + 10% of 460 volts at the equipment terminals for 4KV transfer bus heavy and light load voltage conditions.

Motor starting voltages for safety related mo~orss remains above 70% for transfer bus heavy and loght load conditions and switchyard high and low grid voltage. With the lighest loading on safety b~ses and high switchyard grid voltages equipment terminal voltages remain within 10% of nameplate rating,

4.0 Feeder Cables to New Load Centers lHl, and lJl

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4.1 Data Voltage 4 KV nominal. Cable identification: 1J7PH2 to lJl 1H7PH2 to lHl Cable lengths: 1J7PH2 = SO feet 1H7PH2 = 90 feet Cable type: 3/C 500 MCM aluminum cable with aluminum armor 90°C rated SKV Cable impedance: 0.0461 + j 0.0283 ojms/1000 ft.

             *Cable    ampacity:          NEC 310*-16 s = 330 Amps 4.2  Ampacity Load *center lJl and lHl maximum loadin8s can be taken as their maximum rating on 1333 KVA. Using lowest allcwable bus voltage of 0.90 4000 = 3600 volts. Maximum cun.ent = 211+ Amps.

This is within cable rated ampacity of 330 Amps. 4.3. Cable Voltage Drop Cable voltage drop will oe calculated on maximum current of section - / 4.2 plus 25% for motor starting 268 Amps ' power factor = 0.80 foe diesel feed to bus. V = IZ -{f" where V= Voltage d-op line to line (vector) I= Full loed current (vector) Z- Cable impedance (vector) Cable 1J7PH2 Z= 50 ft x (0.0461 + J 0.0283) ohms/1000 ft Z= 0.0023 + j 0.0014 I= 268 Amps@ 36.8° I= 214.4 + j 160.8 v = rz-(r" V = (214.4 + j 160.8) (0.0023 + j 0.0014)(1.732) V = (0.268 + j 0.67) (1.732) Volatge drop for cable 1J7PH2 = 1.24 volts Voltage drop = 0.031% I I

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Cable. 1H7PH2 Since voltage drop is a line~r function with impedances a ratio of cable lengths will give voltage drop for cable 1H7PH2. Voltage drop CJO Ft x 1.25 volt= 2.25 volts or 0.06% SO Ft

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• 480 Volt Bus lJ Haximum Loading STATION SERVICE SYSTEM CALCULATIONS

                                                                   *DATA SHEET 11 Starting Voltage~ Low Volta8e Motors X        JOB ORDER NO. 12846. 23 CLIENT VEPCO             PLA.i.'!T _S_u_r_r_y~~~--

mm no. ]4os B'l {:) q. \Y;'J'.llUA~ DATE ~-5-*_J4 ____-h._t9__~-- I ,&pil

 .oooooooo6995exo        PROGRAM VERIFICATION NO.          REVIEWED BY            $.i/
*
   ---1     HP MOTOR BEIHG STARTED                                   DATE         !>l(G/7'7

• 460 V. MOTOR ?U.J-fc:PLATE MOTOR LEADS .
  • ---l AMP I LOCKED ROTOR CURRENT R ...
• X =-
• OHUS/PHASE
  • --- *25 PF OF LOCKED ROTOR CURRENT
• 1000 KVA TRANSFORHER, STEP-DOWN TO MOTOR VOLTAGE
• 8a00 PER CENT IMPEDANCE VOLTS, STEP-Dmm TRANSFOIDIBR
• 1po2 KVA PRIOR LOAD ON TR.Al!SFOR1IBn. SECOlmARY
  • --- .85 PF, PRIOR LOAD
• 160 lfilA HIN. SHORT CIRCUIT AVAILATILE AT TRANSF. PR.I. TERHINALS

   ---

NOH. PRI. VOLTAGE:1~ 4000 V; PIU. TAP : ** RECOH.* li056 CHOSEN (7) (8) (9) (10) PRI. SEC. HOTOR MOTOR - VOLTAGg VOLTAGE STARTIHG RU1n1ING LOADED, LOADED, VOLTAGE, VOLTAGE,

   %            PU *        %                %              (7)     NOH. PRI. VOLTAr.E BASE 110.00     le0789                      105028 100.,00      .9695                       94eJ5              (8) (9) (10)             HOTOR 95.,00     .9142                       88.82                       NAl !EPLATE VOLTAGE 96.06      .9260                       90.00                       BASE NOMmAL SHYD lOU.30       .9728                       %.68 GRID HIGH 101.94       .9909                       96.48 GRID LOW 98.65      .9546                       92.86 DIESEL 104.UO     1.0135                        98.74

e e DATA SHEET 11 480V Bus lJ; '.:tarting JOO!Ip Motor l-RS-P-2Il STATIOli SERVICE SYSTEM CALCULATIONS Starting Voltage - Low Voltage Motors X JOB ORDER NOl2846.23 CLIENT VEPCO PLANT Surrv RUN NO. 1406 BY AJ. 1. CJt(}JJ&, DATE 5-/t-79

 .oooooooo6995exo           PROGMM VERIFICATION NO.       REVIEWED BY   Ef};-r/

• 300 HP HOTOR BEIHG STARTED DATE sJ;t,/7&/

   ---

• 460 V. MOTOR UAMEPLATE MOTOR LEADS y
  • 2450 AMP. LOCY.ED ROTOR CURRENT R = *.0127 X Q *00113 O}ULS/Fi-IASE
  • *25 PF OF LOCKED ROTOR CURRENT f I
• 1000 KVA TRANSFORMER, STEP-DOWN TO MOTOR VOLTAGE i
• 3.00 PER CENT UlPEDANCE VOLTS, S'.l'EP-DOWH TRAN'SFOR11ER

* ---   725  KVA PRIOR LOAD OH TRANSFORHER SECOIIDARY

• • :e--- ~85 PF, PRIOR LOAD

* ---   160  't-fvA lUN. SHORT CIRCUIT AVAILABLE AT TRANSF. PRI. TERMINALS NOU. PRI. VOLTAGE: t,         4000 v*;  PRI. TAP:**          RECOM.* 4056    CHJSEH (7)           (8)        -(9)          (10)

PRI. SEC. HOTuR MOTOR VOLTA'.;E VOLTAGE STARTING RUN'IJING LOADED, LOADED, VOLTAGE, VOLTAGE,

7. PU  %  % (7) NOH. PRI. . VOLTACm BASE 110.00 .9429 83.17 100.00 .8481 74.82 (8) (9) (10) 110TOR 95.00 .8003 70.60 NA?1EPLATE VOLTAGE 106.18 .9069 ao.oo BASE UOHIHAL SWYD l00.30 .8510 75.07 GRID 1IIGU 101.94 .8666 76.45 GI.ID LOW 98.65 .8353 73.68 DIESEL 104.00 .8862 78.17

e eDATA SHEET 11* 480 Volt Bu:, lJl( new); Haximum Loading STATION SERVICE SYSTEM CALCUl.ATIONS Starting Voltage - Low Voltage Motors X JOB ORDER NO .12846.23 CLIEr!T VEPCO PLANT Surry

        . rum     NO. H07          BY    tJ 1. CtqntA
                                                 > 7 DATE    5-/4-7Cf

• oooooooo6995exO PROGRAM VERIFICATION NO
• REVIEWED BY lfi¥/

l UP MOTOR IlEIHG STARTED DATE sJ;6/7"1 460 V. J10TOR UAMEPLATE l AHP. LOCKED ROTOR CURRENT

• MOTOR LEADS X oz *

                                                                                          .

OH? 1S/ PHAS r:

**                                                     R,,.
            .25      PF OF LOCKED ROTOR CURRENT
**

• 1000 KVA TRA11SFOPJ1ER, STEP-DOWN TO MOTOR VOLTAGE
• 8., 00 PER CENT IMPEDANCE VOLTS, STEP-DOWN TRANSFOlUfER
• 735 KVA PRIOR LOAD ON TRAUSFORHER SECONDARY

**         .85       PF, PRIOR LOAD
  * ---    160 MVA HIN. SHORT          CIRCUIT AVAILABLE AT TPJ.JJSF. PRI. TElUfINALS NOH *. PRL VOLTAGE:*              4000 V;    PRI. T.AP:**         RECOM.

• 4056 CHOSEU .

(7) (8) (9) (10) PRI. SEC. HOTOR HOTOR VOLTAGE VOLTAGE STARTING RUNNING LOADED, LOADED, VOLTAGE, VOLTAGE,

7. PU  %  % (7) NOH. PRI. VOLTAhP.

BASE 110 .. 00 l.0939 l06a78 lOOeOO .9866 96.06 (8) (9) (10) HOTOR 95.,00 09326 90.65 w~imPLATE VOLTAGE 94.39 .9260 90.00 BASE HOHIHAL SWYD 100.,30 c9898 96.38 GRID HIGH 101.94 1.0075 98.15 GRID tow* 98.65 .9720 91+.60 DIESEL 104.00 1.0296 l00.36.

e e DATA SHEET 11 480 Volt'Iluses lJ and lJl; Plant Light Load Condition STATION SERVICE SYSTEH CALCULATIONS

• Starting Voltage - Low Voltage Motors X JOB ORDER N0.12846.23 CLIENT VEPCO PLANT Surry RUU NO. =l-'-40"""8""",__ BY* l) '1, Q1/JU,t., DATE 5-J 1--71

 .oooooooo6995exo               PROGRf\11 VERIFICATION NO~        REVIEWED BY      #f?L-/
                                                                                                     /'

n

   --=1       UP MOTOR BEING STARTED                                       DATE    );'l b/z "l

• 460 V. MOTOR ?lAMEPLATE MOTOR LEADS
  • --=1 AMP. LOCKED.ROTOR CURRENT R ~
• X .. ,;: OHHS/PHASE
  • *25 PF OF LOCKED ROTOR CURRENT

*    .1000    KVA TRANSFORHER, STEP-DOWN TO MOTOR VOLTAGE

• 8~00 PER CENT IMPEDANCE VOLTS, Sl'EP-nomr TRANSFOillfER
• 100 KVA PRIOR LOAD ON TnANSFORllER SECONDAR.Y
  • _.,85 PF, PRIOR LOAD
• 160 HVA HIN. SHORT CIRCUI'£ AVAILABLE AT TAANSF. PRI. l'ErJfINALS NOH. PlU. VOLTAGE:~: 4000 V; PRI. TAP : *M~ P.ECOM.
• 4056. CHOSim (7) (8) .. "(9)*:.

                                .. ~ ;

(10) PRI. SEC. HOTGR HOT::JR VOLTAGE VOLTAGE STARTING Rmn;ING LOADED) LOADED, VOLTAGE, VOLTAGE,

   %             PU          :;        %             ,:            (7)   NOH. PRI. VOLTAr.I.~

BASE 110.00 101269 110.09 100.00 1.0235 99.75 (8) (!>) (10) HOTOR 95.00 .9718 94.58 NAUEPLATE VOLTAGE BASE NOUIUAL SWYD LIGHT.. LOAD 107.Sl 1.1012 107 .52 GRID HIGH LIGHT LOAD 109.10 1.1176

• 109.16 GRID LOW-LIGHT LOAD 1os.91 1*.oa47 105.86 DIESEL -nus LIGHT LOAD 104.00 l.0649 103.89

1\. e DATA SHEET ll 480 Volt Bus lH; Maximum Loading STATION SERVICE SYSTEH CALCULATIONS Starting Voltage *- Low Voltage Motors X JOB ORDE!l NO J.2846.23 CLIENT VEPCO PLANT . Surry RUii UO. 1409 BY /y q, ~ DATE 5-/4-79

     .,000000006995ex0        PROGRAM VERIFICATION NO.        REVIEWED BY       fl/ld

• l IIP MOTOR BEING STARTED DATE <-:.pt,/79
• 460 V. MOTOR.UAMEPLATE MOTOR LEADS y

   **           l  A.MP. LOCKED ROTOR CURRENT           R=

• X =
• murn/PIIASE

   **        ,25   PF OF LOCKED ROTOR CURRENT

• 1000 KVA TRANSFOE!IBR, STEP-DOWN TO MOTOR VOLTAGE
• 8,00 PER CENT IMPEDANCE VOLTS, STEP-DOWH TRANSFORHER
• 1002 KVA PRIOR LOAD ON TRANSFOIUfER SECONDARY

   ** --*~8-5      PF, PRIOR LOAD
     * --1=6..._3  HVA HIN. SHORT    CIRCU.iT AVAILAELE AT TRA.i.'-l"SF. FRI. TE1JfINALS NOH. PRL VOLTAGE: 1"r       4000 V;   PRI. Tf.J}:**           RECOH. 10; 4056     CHOSEN (7)           (8)        (9)          (10)

• PIU. SEC. HOTOll 11:o*ro"?.
• VOLTAGE* VOLTAGE STARTING RUNHIHG LOADEDt LOADED, *VOLTAGE, VOLT.1tGF.,

        .,            PU*         %          _J __              (7)   NOH. PRI. VOLTAr.E
        "'

BASE 110 .. 00 1.0789 105.28 100000. .9695 911.35 . (8) (9) (10) HOTOR 95.00 .9142 88.82 ?lAlIBPLATE VOLTAGE 96.06 .9260 90.00 BASE NOMIHAL SWYD 102.75 .9998 97.37 GRID HIGH*

   . 104043 1.0182                            99.21 GRID LOW 101.os        .9811                      95.51 DIESEL 104.00       1.0135                      98.74

... e eDATA SHEET 11 480 Volt lH; S':arting 300Hp Motor l-RS-P-2A STATION SERVICE SYSTE?*{ CALCULATIONS Starting Voltage - Low Voltage Motors X JOil ORDER NO. 12846.23 CLIENT VEPCO PLANT Surry . RUH NO. 1410 DATE '5- /4-7 Cf

     .oooooooo6995ex0         PROGRAM VERIFICATION NO. REVIEWED BY    i..,:l)if

• 300. HP MOTOR IlEING STARTED DATE 5k1:,/7'1
• 460 V. MOTOR HAMEPLATE 2450 AMP. LOCKED ROTOR CURRENT MOTOR LEADS R=*.0092 X g r~ .0090

                                                                                          .

OI-ll!S/PHASE

   **
   **   --- *25   PF OF LOCKED ROTOR CURRENT

• 1000 KVA TRANSFORHER, STEP-DOWN TO MOTOR VOLTAGE
• 8.,00 PER CENT U1PEDANCE VOLTS, STEP-DOWH TRJ.J~SFORHER .

    * ---   725   KVA PRIOR LOAD ON TIW1SFORHER SECONDARY
   ** __._8_5     PF, PRIOR LOAD
    *   -----

163 l'NA HIN. SHORT CIRCUIT AVAILABLE AT TP.ANSF. PRI. TERMINALS H'Ol1. PRI. VOLTAGE:* 4000 V; PR.I. TAP : tn': RECOH.,', 4056 0-lOSEH (7) (8) (9) (10) PRI. SEC. HOTJR MO'!:'OR VOLTAGE VOLTAGE STARTING Rillr.1ING LOADED, LOADED, VOLTAGE, VOLTAGE,

7. PU  %  % (7) NOH. PRI. VOLTAr.l~

BASE 110.00 .9358 84s82 100000 .8418 76e30 (8) (9) (10) HOTOR 95.00 .7943 71.99 ?TAHEPLATE VOLTAGE J..04.33 .8826 80.00 BASF. UOMIHAL SHYD 102.75 .8677 78065 GRID HIGH 104.43 .8836 80.08 GRID LOW 101.os .8517 77.20 DIESEL 104.00 .8795 79.72

eDATA SHEET 11 480 Volt Bus lHl (new); Haximum Loading STATION SERVICE SYSTEM CALCULATIOl;S Start:i.ng Voltage .:. Low Voltage Motors JOB ORDER NOJ.2846.23 __,_ CLIENTVepco ___ PLANT Surry mm no. 1411 DATE __ 4-7 __ 5-J_;..._,__.:.,._ Cf

 .,OOOOOOOOG995ex0             PROGR!Jl VERIFICATIO~T NO.           REVIEWED BY        49<<
* ---"l           HP HOTOR BEING STARTED                                      DATE     ~<<?f/7/

• 460 V. MOTOR UAHEPLATE MOTOR LEADS
  • ---l AHP. LOCKED ROTOR CURR.ENT R ""
• X ::s
• OHHS/PHASE
  • .25 PF OF LOCKED ROTOR CURRENT
• 1000 KVA TRANSFORMER, STEP-DOWN TO 110TOR VOLTAGE
• 3.,00 PER CENT IMPEDANCE VOLTS, S"CEP-omrn TR,\NSFORHER
• n59 KVA PRIOR LOAD ON TR.AlISFORHER SECONDARY
  • --=e=8~5 PF, PRIOR LOAD

 * --=1=6.:;;..3  MVA HIN. SHORT CIRCUIT AVAIL!-illLB AT TRANSF. FRI. TEi.JiINALS NOH. PR.I. VOLTAGE;*              4000 V;  FRI

• TJ,.:P ; :i:,*: RECOl-1.
• 40:i6 C110SEH (7) (8) (9) (10)

PIU. SEC. HOTOR MOTOTI. VOLTAGE VOLTAGE STARTING RUNNING LOAPED, LOADED, VOLTAGE, VOLT!'.GE,

7. PU*  %  % (7) NOH. PRI. VOLTAC~E BASE llOgOO 1., 0980 107.20 lOOaOO .9913 96.53 ( 8) (9) (10) HOTOR 95000 .93i6 91.15 UA1 !EPLATE VOLTA(;E 93.93 .9260 90000 BASE

~mMIHAL SHYD l02o75 1.0207 99 *'* i GRID HIGH 104.43 1.0387 101.26 GRID LOW 101.os 1.0025 97.65 DIESEL 104.00 1.0341 100.so

.. e Station condition: Both Units at 100~~ power DATA SHEET 11 Light load on R.ss For 480V bus 1H and Bus lHl STATION SERVICE SYSTEH CALCULATIONS Starting Voltage - Low Volto.ge Motors JOB ORDER lm. 12846. 23 CLIENT VEPCO PLk"IT ~-S_u_r~ry.___ __ mm !l'O. 14 J2 BY /j 1. ~~ta., DATE 5- )4"-7'J I

     .OOOOOOOD6995ex0           PROGRAM VERIFICATION NO. REVIEWED BY       LSJ?;.-!f

• l HP HOTOR BErnG STARTED DATE ~-J!Glj1
• 460 V. MOTOR lWIBPLATE MOTOR LEADS y

   ** ___l          AMP. LOCKED ROTOR CURRENT         R =

• X ...
• OHHS/PHASE

   **      .25      PF OF LOCKED ROTOR'CURRENT

• 1000 KVA TRAUSFOIUfilR, STEP-DOWN TO MOTOR VOLTAGE
• 8,.00 PER CENT IMPEDANCE VOLTS, STEP-DOWH TRAI-lSFORlffiR
• 100 KVA PRIOR LOAD ON TRAt!SFORlfER SECONDARY

   ** --c---

e85 PF, PRIOR LOAD

• 163 MVA l!IN. SHORT CIRCUIT AVAILABLE AT TPJ.JISF. PRI. TERliINALS

                                          ..,

NOH. PIU. VOLTAGE::~ 4000 V; PRI. TAP:ib~ (7) (8) (9) - (lCJ) PRI. SEC. HOTOR 1~0TOR VOLTAGE VOLTAGE STARTING RUNNING LOADED, LOADED, VOLTAGE, VOLTAGE,

7. PU  %  % (7) NOH. PRI. VOLTAr.E BASE 110.00 1.1269 110.09 100.00 1.0235 99.75 (8) (9) (10) !10TOR 95.00 .* 9718 94.58 !lAHEPLATE VOLTAGE

                                                                     *BASE UOHIHAL S'i.JYD- LIGHT LOAD
  . 107 .98      l.1061                       108.00 GRID HIGH- LIGHT LOAD 109.61       1.1229                       109.69 GRID Lm.J'- LIGHT LOAD 106.35       1.0892                       106.32 DIESEL-Bus LIGHT LOAD 104.00       1.0649                       lOJ.89

APPENDIX A STATION SERVICE SYSTEM CALCULATIONS This appendix is a calculation of the voltage profile for the Unit 1 4160 volt emergency buses. The redundant emergency 4160V buses lH and lJ are fed from the Reserve Station Service Transformers A and C respectively. Reserve Station Service Transformers are supplied from separate 36.5 KV switchyard buses. Calculation of light loading and heavy loading conditions on the Reserve Trana-formers is used to determine the voltage profile of the 4160V Eme_rgency buses. Data for Calculations

1. Reserve Station Service Transformer A Rating 18s000/24s000/30sOOO KVA OA/FA/FA Nominal 34.5 KV Primary to 4160V Secondary Impedance= 5.77% nominal at 18 5 000 KVA 11 No load" primary taps: Tap 1 36 5 200 volts Tap 2 3Ss300 volts

_Tap 3 34 s400 volts

                                               *'Tap 4       33 5 500 volts Tap  5       32 5 600 volts
                                       ."I.:).

Primary tap 1.n use:"':, .:.-. Ta]? 3 34 sl~OO volts

                                                           .;

cur:ent primary tap setting on 3., -'34 5 400 Secondary load eap changer 16 raise steps 16 lower steps Maximum raise (boost) 4670 volts Neutral 4154 volts Minimum lower (buck) 3740 volts The secondary is currently set to maintain 4300 volts at the transfer buses with a 30 second time delay.

e

  ",:. . Reserve Station Service Transformer C All data is the same as Transformer A except Impedance= 5.63% nominal at 18 sOOO KVA.

3. Switchyard Voltage Range (swing)

The Reserve Transformers are supplied from 36.5 KV switchyard buses. These buses are fed from 36. 5 KV tertiary windings of the 500 KV to 230 KV auto transformers. The present tap setting on the auto. transformers primaries is 512s500V. From VEPCO system planning departments total voltage swing oN 500 KV lines: minimum 505 KV maximum 520 KV corresponding 36.5 KV swing: minimum= (505s000 KV/512 5 500 KV) x 36.5 KV - 35.96 KV maximum= (520 5 000 KV/512s000 KV) x 36.5 = 37.03 KV

4. Minimum Short Circuit Available on 36.5 KV bus From VEPCO automation and control department the minimum short

               &hort circuit nvailable from 36.5 huses is 519 HVA.

s. Impedance of Cables from Reserve SPcondaries Cables 4 - 2000 1*~CM aluminum cables per phase 90°C rated; 610 feet length.

Impedance: = 0.00197 + j 0.01069 ohms On lMVAr 4.16KV base per unit resistance = 0.000114 per unit resistance = 0.000618

e Station Service System Calculations - Voltage Profile A. This calculation determines the automatic tap changP-r position for light load on Reserve Station Service Transformer A *. Station condition: 2 units at 100% power; Reserve Station Service Transformer A feeding bus lJ; load on bus lJ = 2.39 MVA Total local load on transformer primary s*Jrce: Bus lJ + Bus 2H + Bus 2G = 2.39 MVA + 2.39 MVA + 8.8 MVA = 13.58 MVA The transformer load tap changer is set to maintain 4300 volts at transfer bus D. Data sheet 4s Run No. 1401s is the program input data. Da~a sheet 5s Run No. 1401s is program output. A search was made by the program Qn Data sheet 5 to find the primary transformer tap which results in 4300 volts (1.075 p.u.) on the medium or transfer bus. the result is printed in column (5). As shovms a tap of 34.65 KV results in 1.0751 at the transfer bus. Maximum bus vol~age on the grid i~ 37.03 or 1.0146 p.u~ The light load maximum 4 KV bus voltage is 1.0910 p.u. for this high grid condition as shown on data sheet 5. B. This c.alcula:tion determines the minimum voltage at 4160 volt emergency bus for heavy loading on the RSS transformer A. Station Condition: Unit 2 100% power Unit 1 trip from 100% power with SI signal. Reserve Station Service Transf0rmer A RSS A feeding emergency bus lJ and station bus lA. Loading on RSS A is 16.35 KVA Other local load on transformer primary source is transfer bus Ds Es and intake structure bus 2G; total= 39.25 MVA The load tap changer position prior to the unit trip was determined in Run No. 1401 as 34.65 KV. Upon unit trips it is assumed that the load tap changer does not move to increase voltage to the preset level.

... e Program inputs are shown on Data Sheet 4s Run No. 1402. Program outputs are shown on Data Sheet 5. The autotap .::hanger. was set at 34.65 KV. Fr.om output data 5 at nominal grid voltage of 36.5 KV the 4 KV emergency bus lJ would be at 1.0030 p.u. The minimum voltage on this bus occurs at grid low level of 35.96 and would be 0.9865 p.u. as shown on the data sheet attached.

SUMMARY

From calculation Run Nos. 1401 and 1402s the voltage profile for 4 KV emergency bus lJ is : minimum bus voltage = 0.9865 p.u. or 3946 volts maximum bus voltage = 1.0910 p.u. or 4364 volts Similar calculations wei:-e also made for 4:..60 volt emergency bus lH. The input and output data are attached on data sheets for Run Nos. 1403 and 1404. The results are a voltage profile for 4 KV emergency bus lH: minimum bus voltage = 1.0105 p.u. or 4042 volts maximum bus voltage = 1.0961 p.u. or 4384 volts "5 ---:-:i

                                                           .....
                                                      *~.*.J
                                                       ...."';.*.'").:::= .
                                                       .*.. ****~- _:,

, :-\::1.,)

...:

Station Condi~ior-oth Units at 100% power ... Light Load Condition Reserve Station Service Trans. A DATA SHEET 4 STATIOH SERVICE SYSTEl! CALCULAT_;_mrs J~tor Starting Voltage X. OUUUOOU06/4 7 3ex0 PROGRA11 VERIFICATION NO. JOB ORDER rm.12846.23 CLIENT -VEPCO PLANT Surry RUH HO.* HiUl IlY A 1, sJ41ttiJv DATE 5 7 Cj REVIEWED BY LWJ ;- DATE r/;6/?1

• 1. ___ __....__ HORSEPOWER, HOTOR TO TIE STARTED

   **  2.  *--='*-*O,,_,O,.___ KV,
   **  3. ____                              MOTOR NAHEPLATE RATING
                              ..__._ AHP, LOCKED ROTOR CURREHT FOR AROVE ~fOT-OR
   **  4. _ _.....3=0....,..~oo"--- HVA, TRANSFORMER TOP PRIHARY RATING
   **  5.
          ------ mnrnER                        OF SECONDARIES ON TRJ.NSFORHER
   **  6. ____.&...:ao=u~-            HVA, PRIOR LOAD ON OTHER SECONDARY
   **  7. _ __,'"'">,...3....2'---    !WA, PRIOR LOAD ON SAHE SECONDARY

8. ___5._.... 1 9'--- HVA, MI11IHUH SHORT CIRCUIT FROH PRIMARY SOURCE

   **

• 9. _ _ _'i~.o..1Z:..J.7_ _ PER CEHT, TnAHSFOIU-llill NOMINAL IHPEDANCE

   **10 *

• ooosssuoo TR.AHSF8RHER BASE CONVERSIOH FACTOR ( t:bcf on Data Siu~.ct 3)

   * *11.

• 00061.8 PER UNIT, TRANSFORHER SECONDARY LEADS REACTAHCE (lx o.-.

Data Sh2c.t 3)

   * *12.

• rJOOlJ/+ PER UNIT, RESISTANCE OF TRAN'SFORHER .AND LELDS (p' on Dntr\ Sheet 3)

     *13.        13. 58               1'fVA, OTHER LOCAL LOAD ON TRANSFOPJ*fER PR.IHA.RY SOURCE
                  *0     +      j  .001926                .o              .o +  j   .0038JO Ze                       Zc Vnl'                       .064801                      open
                               +  j    .034975                                +   j    131.938361 IHPEDANCES 2 PER IDHT ON l HVA, TRANSF. SEC. V. BASE Za   a  LOCKED ROTOR OF MOTOR BEING STARTED Zb   a SUPPLY TRANSFORMER SECONDARY AHD SECONDARY LEADS Zc   a SUPPLY TRANSFORHER, OTHER SECO!IDARY, LEADS, AND RUNNIHG LOAD Z<l

• SUPPLY TRA.USFOIU.ffiR PIUHARY Ze
• RlnlHING LOAD ON SUPPLY TRAHSFORi.'fER PRIMARY CIRCUIT Zf a HIGH VOLTAGE SOURCE, MAXIMUH

Light Load Condit'n e Rescrv1! Sr:ation Service Trans A STATION SERVICE SYSTEH Cf..LCULATi:ONS DATA SHEET 5 x.ooouuuuo6815exo PROGRAM VERIFICATION NO. JOB ORDER HO. 1284 6. 23 CLIENT VEPCO PLANT ~S...;;.u;;;..rr;;;...y'------- RUN HO. 1401 BY

                              .

N~1-, Ck*J1J°ti DATE ry 6J.6/ :,7/t./7? 5-J4-7q HiO.U l{IJA, HIN. TRlu"ISFORMER SHORT CIRCUIT CONTRIBUTION AT BUS AT pf .. .8800 Q "" 0 368200 + j .l~H1733 PU AT FULL VOLTAGE NOM. PRI. VOLTAGE:* 36.50 PRI. TAP:** RECOM.* 311 .40 CHOSEN

                                .*:m:r..;::r.;;:-:-: PROFILE

---

( l) (2) (3) **;:*,*, (4) (5) (6) (7) NO LOAD Ii AT SPECIFIED LOADS

---

S-0-UR_C_E_.;...__ _ _T_RAN_'_S_F-. _T_Rt:_UI_S_F_.___;M:.:.:IB::..D...;;..::..V.::::.OL.:;.;T::.;;:..;;=--=-~;.;;:H_O_T_OR---:---

     %           KV         SEC. PU                 PRI. PU       BUS PU                 START %                         RUN %

105.00 38.32 lol586 1. 014 7 1.1377 111. 28 100.uo 36.50 lol034 .CJ~53 1. 01129 107.80 95.UU 34.67 lo0483 * ~l1 SB 1. 0281 102.31 99.28 1.0955 .9781 1. 07 50 107.01 HEW TAP: 36.06 105.0U 38.32 1.1053 1. OJ/17 1. 0850 108~00 100.uu 36.50 le0526 .9:352 1.0327 102.77 HEW TAP: 35.00 l05cUU 38.32 LD88 j 1.0Jl17 1.1181 111.31 100.00 36.50 1.0845 I .9853 1. 0642 105.93 UEW TA!': 35.50 105.00 38.32 1.1227 1. 014 7 l.1022 109.73 100.ou 36.50 1. 0692 .9g53 1. QL,91 104.42 HEW TAP: 34.75 105.0U 38032 1.1469 1.014 7 1.1262 112.13 100.ou 36.50 1.0923 .9853 l.0719 106070 rmw TAP: 34.60 105.0U 38.32 1.1519 1.0147 1.1311 112.62 100.00 36.50 1.0971 .9BS3 1. 0766 107.17 NEW TAP: 34.65 1u5.oo 38.32 1.1503 l. 034 7 1.1295 J.12.45 100.00 36.50 1.0955 .()853 1.07.51 107.0l 101.46 37.03 1.1115 .9997 1.ono 108.60 98.53 35.96 l.0794 .971)7 1.0591 105.41 (1) (2) (4) UO!!. PRI. VOLTAGE BASE (3) (5) (6) (7) I10TOR NlllffiPLATE VOLTAGE BASE

Station Con<lition-nit 1- Trip from 1007. power wi.SI signal Unit 2- 100% pcmcr nATA SHEET 4 Heavy Loa<lin8 RSS Trnns. A STATION SERVICE SYSTEli CALCULAT". . OliS Hotor Startinr, Voltage X. 0000000064 73e:x:O PRCGRAH VERIFICATION NO, Jon ORDER HO. ] 2846. 23 CLIENT VEPCO PLANT _s.urrr

                                                                                                   '

RUH HO.* 1402 ilY Jo 1, CJ:,1cLitl DATE 5-/f-7~ REVIfil.TED BY

                                                       ~                               DATE       -sj;fc,/7'1

• 1. l HORSEPOWER, MOTOR TO HE STARTED

               -----

2. ,~.

                   -00
 **                     - - - KV, MOTOR NAHEPLATE llATING l
 **    3~
          ------                  AHP,   LOCKED ROTOR CURREHT FOR ARO VE !*mTOR
 **   4.         30000           HVA,    TRANSFORMER TOP PRIMARY RATUW
          ------
 **   5.          1               HUlffiER OF SECONDARIES ON TRANSFO.RHER
          ---""----

. * ,i 6 * .oo

                     '----       MVA, PRIOR LOAD ON OTHER SECONDARY
 **   7.         16.35
                   ...;..;.'---- lfVA;* PRIOR LOAD ON SAHE SECOrmARY 519
 **   8.
                   ----          HVA,    MIUIH1]1 SHORT CIRCUIT FRO!f PRIH)JlY SOURCF.

• 9. 5 .. 77

                 -""---           PEil CEUT, TRAHSFORHER lWHINAL IMPEDANCE
 **10.     .000555000             TRANSFORMER BASE CONVERSION FACTOlt (t:bcf on Data Sheet 3)
 * *l.l.     .000618              PER   UNIT, TRA.:.'ISFORl-CR SECOlIDARY LEADS REACTAHCE (lx on
           ------                                                                                Data Sheet 3)
 * ,'rl2,    .000114              PER   UNIT, RESISTANCE OF TRANSFOIU-fER AND LEADS (p' on
           ------                                                                                Data Sheet 3)
   *13.          39.25
          ------                 }fVA, OTHER LOG.AL LOAD ON TRANSFORHER PRIHARY SOURCE
                  .o +     j  .001926                    .o                      .o +   j   .003020

__....,..,,,,v...;..-------...A.,,V\)....__ _ _ _-.r_......----, Zf Ze zd Zc zb Za Vnl' .022420 open 20.017229  ? QVi; IHPEDANCES' PER mnT ON l HVA, TRANSF. SEC. V. BASE Za a LOCKED ROTOR OF MOTOR BEING STARTED Zb a SUPPLY TRANSFORMER SECONDARY AHD SECONDARY LEADS Zc a SUPPLY TRANSFORMER, OTHER SECOfIDARY, LEADS, lu'{D RUNNIUG LOAD Z<l .,. SUPPLY TRAllSFORHER PRIMARY Zc

• RUHNING LOAD ON SUPPLY TRAHSFORHER PRIM.ARY CIRCUIT Zf a HIGU VOLTAGE SOURCE, "MAXIMUH

e Heavy Loading RSS Trans A STATION SERVICE SYSTEM CALCULATIONS DATA SHEET 5 x.oooooooo6815exo PROGRAM VERil'ICATION NO. JOB ORDER NO. 12846.23 CLIENT VEPCO PLANT Surry RUN HO. _1~t-'10-'-2_ BY X) 1-: a~t DATE 5- / f- 7~

                                                  .>   l-:GjilT 160.8 mA, MIN. TRANSFORMER SHORT CIRCUIT CONTRIBUTION AT BUS AT pf*      .8800   Q=     .053822 + j             .029050             PU AT FULL VOLTAGE NOM. PRI. VOLTAGE:*          36 .50 PRI. TJ.J!: )~*                                      RECOM.*                      34.65      CHOSEN VOLTAGE PROFILE (l)            <z).          (3)          I         (4)                  cs)                              (6)                    (7)

_ _ _ _ _ _N_O_LO_AD _ _ _"""_~.,-,.TS_F_. 1, -TR-,Ans-,..-.

                                                          -    ___;,;A~T_S_P-'E.;...;;C_I_FI-'P'--*,D~L.;..OAD....;;;1;;.;;s_ _,_ __

SOURCE MED VOLT MOTOR

   %            KV
                            .1..r...u.1 SEC. PU         I      \.l\,H PRI. PU
                                                            ~-

BUS PU STAR.T % mm t 1os~oo 38.32 1.1503 !' .9~L16 1. 0588 105039 100.00 36.50 L 095511

• 9454 1.0030 99.81 95.00 34.67 l.0/107 I 08959 .%68 94018 90.81 33.14
• 9949
• I .8.544 08993 8~.4]

91.38 33.35 1.0011 I .n1101 .9057 90.08 91.30 33.32 1.0002 I .Hs93 .9048 8()099 91.31 33.33 1.0004 .8594 090.50 90e00 91.31 33.33 1.0003 .8594 .9049 90.00 UOMII:AL SWYD 100.uo 36.50 1.0955 1.0030 99081 GRID HIGH

.101..46        37.03         1.1115        I

• 9598 l.0194 101..44 GRID LOW 98.53 35.96 .9308 .9865 98.16 (1) (:!) (4) t:011. l?Rt. VOL'l.AGE BASE (j) (.5) (6) (7) llOTOR NAllliPLATE VOLTAGE BASE

Station Condition-0th Units at 1007. power *

 *,*      Light Load Condition Reserve Station Service Trnns C                                                  DATA SHEET 4 STATION SERVICE SYSTEH CALCULATIOHS.

Motor Starting Voltage x.oooooooo6473exo PROGRAJf. VERIFICATION NO. JOB ORDER HO. 12246. 23 CLIENT .--a.V.;a;EP~CO______ PLANT Surrv RUH HO.* 1403 IlY ~ DATE 5- 14-'J'J REVIEWED BY* 6f¥.i DATE S/(6/71 I

• l. ------ l HORSEPOWER, MOTOR TO TIE STARTED 4.00 KV, MOTOR NAHF.PLATE RATING
  • 2. -------

1 AHP,

• • 3.

        ------                        LOCKED ROTOR CURREHT FOR A.BOVE MOTOR

• • 4. 30.,00

             --""---- HVA,             TRANSFORMER TOP PRIHARY.RATING l

• 5. ---- mnmER OF SECONDARIES ON TMNSFORl-illR

                  .oo           MVA, PRIOR LOAD ON OTHER SECONDARY

• • • 6. -----
• 7. 5~91

                 ---- ?rVA; PRIOR LOAD ON SAHE S:CCONDARY

• • 8. ----- 519 MVA, MIHIHUH SHORl' CIRCUIT FRmr PRIMARY SOURCE
• 9. ------ 5.63 PER CElIT ,* TRAHSFOru-mr.. :mHINAL IMPEDANCE
  • 10. .000555000 BASE CONVERSION FACTOR (the£ on na:a Sheet 3)

              - - - - TMHSFOPJ*iER

• *ll. .000618 PER UNIT, Tfu\NSFORHER SECOUDARY LEADS REACTAHCE (lx on

          ------                                                                             Dat.a Sheet 3) 1h%l2.       .000114             PER UNIT t RESISTANCE OF ~?..*.~rnFomrrm AND LEADS (p I on
         ------                                                    :, . ~'                   Data Sheet 3)
 *13.          14 .. 71         MVA, OTHER LOCAL LOAD ON TRANSFORMER PRI1w1.Y SCURCI:
         ------
                .o +    j    .001926                   .o                     .o +  j .0037{~2
                          .Jv'w fVnl'               Zf
                                .059823 Ze                 zd open Zc        zb 20.017229 Za Vb QV~

IHPEDANCES' PER mnT ON l MVA, TRANSF. SEC. V. BASE Za a LOCKED ROTOR OF MOTOR BEING STAR.TED Zb a SUPPLY* TRANSFORMER SECONDARY AUD SECONDARY LEADS Zc

• SUPPLY TRANSFORMER, OTHER SECONDARY, LEADS, AND RUNNIUG LOAD Zu
• SUPPLY TR..\!:SFORl*lER PRIMARY Zc
• RUUNING LOAD ON SUPPLY TRAUSFOR11ER PRIMARY CIRCUIT Zf a UIGU VOLTAGE SOURCE, MAXIH1Il1

-- Light e Lo.Hling RSS Trans C STATIOH SERVICE SYSTEM CALCUl. .ATlOHS

• DATA SHEET 5 x.oooooooo6Bl5exo PROGRAM VERIFICATION NO.

JOB ORDER NO. ]2846.23CLIEHT VEPCO PLAUT Surry RUN HO. 1403 BY

                                     .

fj 1~ Cht_1v~§1,,

                                                     . I 129.t/

DATE 5 - / 1-7 9 163 0 ?NA, HIN. TPJJ1SFOP.:IBR SHORT CIRCUIT CONTRIBUTION AT BUS 0 AT pf "" .8800 Q"' .148S-:JO ;- j .. 0110367 PU AT FULL VOLTAGE NOH. PRI. VOLTAGE: 1'r 36050 PRI. 'I'.AP:** RECOM.* 34.40 CHOSEN

                                       *vm::-1,c:* °":"ROP'ILE
  --------------

(l) (2) (3) .. '\ ' ---------------- ( 4) ( 5) ( 6) ( 7) NO LOAD I AT SPECIFIED LOADS SOUR.CE TRA."i SF. I ----------------- TRANSF. MED VOLT MOTOR

       %              KV          SEC. PU!!        PRI. PU       BUS PU      START %

105.00 38.32 1.15s6 I 1. 0305 1.12n 112.21

    !OOoOO             36.50       1.10341             .9808      1.0718                     106~69 HEll TAP:          36.31 105c00             38032       1.09771          1.0304        1.0667 100.00            36~50        1.0454              09808      1.0143 HEW TAP:           J/+ol5 105000             38.32       lol671           l. 0305       1.1355                     113c05 lOOaOO            36.50

• 1.111s ji ~9809 1. 07?8 107 .A9 HEW TAP: 33.91 105a00 38.32 lel7S4 1.0105 1.1437 113.87 1D0o0U 36050 Ll.194 .9809 l.Ofl76 108.27 NEW TAP: 34.15 105.,00 38e32 1.1611 Ii 1.0305 1.1355 113.05 100.00 36.50 1.,1115 j * :1809 1.0798 107.49 95.,00 34 .. 67 1.,0559 I .9312 1. 0241 101.91 HIGH GRID 101 .. 46 37.,03 1.1277 oq953 l.0961 109.ll LOW GRID 98.53 35.96 l.0952 .%63 l.0635 105.85 (1) (2) (4) HOU. PRI. VOLTAGE BASE (3) (5) (6) (7) l10TOR NA!ffiPLATE VOLTAGE BASE

... Station Condition.nit 1- Trip from 100% p.ower wi.SI signal Unit 2 100% power Heavy LOadi.ng Reserve Station Service Trans C DATA SHEET 4 STATION SERVICE SYSTr:Jr CALCULATIOHS Motor Starting Voltage x.oooooooo6473exo PROGRAH VERIFICATION NO. JOB ORDER HO. )2846.23 CLIEHT _V-E=D-c~o. _ _ __ PLANT ..,,S._..p....r ... r~Y------ mm no.* 1404 nY 62 J. CJcrru)i

                                                           , I DATE             ~5_-_14_-_7__.1'---~-

REVIEWED BY ~ij DATF. --~--~i'j-/_6~~-7_1'___

• l. 1 HORSEPOWER, HOTOR TO TIE STARTED

2. 4.00 KV, MOTOR HAHEPLATE RA'tING

   **

3. 1 AHP, LOCKED ROTOR CURRENT FOR ABOVE MOTOR

   **
   **  4.         30.00         HVA, TRANSFORMER TOP PRIHARY RATING
       ,;          1            HlTIIBER OF SECONDARIES ON TRANSFOFJ-1ER
   **  JO
   **  6.            .oo        MVA, PRIOR LOAD ON OTHER SECONDARY
   **  7.        18.20          lfVA, PRIOR LOAD ON SAHE SECONDARY
   **  8.            519        "f:fVA,  Mrnnrrm  SHORT CIRCU .C'f FROM PRIMARY SOURCE

• 9. 5.,63 CElIT, TRAHSFOIU*fEh. NOHINA.L IHPEDANCE

                      ---- PEit                                                                                             i i
   **10 ** ooosssooo            TRAHSFORHER BASE CONVERSin!*l FACTOR (tbcf on Datn Sheet 3)                                 i i
                                                                                                                           -I
   * *11.

• 000618 PER UNIT, TRANSFOPJIER SEi:uNDARY LEADS REACTAHCE (lx on Data Sheet 3)

   * *12.

• 000114 PER UNIT, RESISTANCE OF ':'RANSFOlUiER lJiD LElJ)S (p' an Data Sheet 3)

     *13.        26.,60         MVA, OTHER LOCAL LOAD ON TRANSFOR11ER PRIHARY SOURCE
                   .u +  j  .001926                    .o                 .o + j .003742 N                              ~

f Vnl' Zf

                               .033082 Ze              zd open Zc       zb 20 *. 017229 Za Q~

IHPEDANCES, PER mnr ON 1 MVA, TRANSF. SEC. v. BASE Za .. LOCKED ROTOR OF MOTOR BEING STARTED Zb a SUPPLY TRANSFOfilillR SECONDARY A.HD SECONDARY LEADS Zc a SUPPLY TRANSFORMER, OTHER SECONDARY, LEADS, AND RUNNI?lG LOAD Zu .. SUPPLY TRAHSFORHER PilIHARY Zc

• mmNING LOAD ON SUPPLY TRAf~SFORi.'1ER PRIMARY CIRCUIT Zf a UIGU VOLTAGE SOURCE, MAXIMUH

. . Heavy Loading RSS Trans C e STATION SERVICE SYSTEM CALCULATIONS

• DATA SHEET 5 x.oooooooo6B1Sexo PROGRAM VERIFICATION t,lQ.

JOB ORDER NO. 12846.23 CLIENT Vepco PLANT ___ _____ Surrv .._ RUN NO. __ 14_...0"'""l+____ BY N l * °'41?1/td/ DATE _5.;...,_-1_4_-_79_.___ __ I .&r;W 163.0 MVA, XIN. TRANSFORMER SHORT CIRCUIT cmITRIBUT!OH AT BUS AT pf m .8800 Qa .048351 + j .026097 PU AT FULL VOLTAGE NOH. PRI. VOLTAGE:* 36.50 PRI. TAP:** VOLTAGE PROFILE

   ,_____<_1_)

_ ___ NO._<2_) LOAD ___ <3...,.._)_ / _ _<4_)_~~(5....:;)~~;__;,;;...(6~)~----(-7)_ A'f SPECIFIED LOADS SOURCE TRANSF. 1 TR.i\.NSF. MED VOL'l' MOTOR

         %               KV                  SEC. PU          PRI. PU        BUS PU              STARTZ          RUN%

105.00 38032 1.1671 l..0057 1. 0850 108.0l 100000 36050 ,,9557 1.0275 102. 25 1.11151 95.UO 34e67 100559 .9055 .%94 96.45 88055 32.32 * !1843 ~8404 .8936 88.87 89$68 32.73

• 99691 .8519 09070 90.21 89047 32.65 .9%5 .8498 .. ()Ol,6 89.96 89.51 32067 .9950 .. S.'502 09050 90.01 89.,50 32067 .9949 .8501
• 9049 90000 89~50 32 .. 67
• 9949 I .8501 .9050 90.00 i'WMIHAL SWYD 100 .. ou 1.1115 09557 l. 0~7 5 GRID HIGH 101.46 37.03 1.1277 e9703 1.0443 GRID LOW 98c53 35.96 loD952 o 9/ilO 100105 100.55 (1) (2) (4) 1mu. PRI. VOLTAGE BASE (3) (5) (6) (7) 110TOR NAHEPLATE VOLTAGE BASE

    .. .
         *

• APPENDIX B TABULATION OF 10!.DS 480V EMERGENCY POWER SYSTEH SURRY - UNIT 1

.

 ~
  .

, ..

 ,*
 ;,

..,

• (!

I I I

                                *

• 1,

-. .

480V UNIT SUBSTATION "ll-!l" TABULATION OF LOADS KVA LOAD SECTION MOTOR CONTROL CENTER lHl-1 LOCA NO. DESCRIPTION OF LOAD W/LOSP LOSP LOCA 1-C Feeder to MCC lHl-lA (See Page 4) 24.7 24.7 24.7 1-D Control Room Ernerg Supply Fan l-VS-F-41 (1) (1) 1-E Charging Pump Service Wtr Pp 1-SW-P-lOA 8 8 8 1-F *computer Feeder Back-up 1-F 480V Pwr Receptacle

                                                ..

2-D Radiation Monitoring (2-SKVA XFMkS) s s 5 2-D Vital Bus (1-10 KV A XFHR ) s 5 s 3-D Control and Relay Room A/C Cond. Pp 14.5 14.5 14.5 4-A Chilled Wtr A/C l-VS-AC-1 11.2 11. 2 11. 2 4-A Chilled Wtr A/C l-VS-AC-7 11.2 11. 2 11. 2 4-B Chilled Wtr A/C 2-VS-AC-7 7.1 7.1 7.1 4-B Chilled Wtr A/C 2-VS-AC-9 7.8 7.8 7.8 4-E A/C Chiller Pp l-VS-P-2A 19.9 19.9 19.9 5-A Control and Relay Room Wtr Chiller l-VS-E-4A 95.6 95.6 95.6 5-B Battery Charger lA-1 38.e 19.4- 38.d 5-B Battery Char ~er lA-2 (2) (2) (2) 5-C Charging Pp Cooling Wtr Pp l-CC-P-2A 11.2 11.2 11. 2 i 5-D Emerg Generator Fuel Oil Pp 1-EE-P-lA 1.1 1.1 1.1 I 5-E Heat Tracing (1-30 KVA XFMR) 15 15 15 Ii 6-A Safeguards Cond Pp l-HS-P-3B I 6-E Relay Room Emerg Supply Fan l-VS-F-42 ( 1) (l) l f I 7-D Seal Oil Back-up Pp 25.5 25.5 25.S l 8-C Heat Tracing ( l-15KVA XFMR) 7.5 7.5 7.5  ! I 8-C 8-D Heat Tracing (l-30KVA XFMR) Turning Gear 15 59.8 15 59.8 15 59.8 II ' I

                                                                                          !

Il TOTALS 383.9 364. 5 383.9 'i (l) Manual start 60 min flowing LOCA. (2) Assumed single charger operating at full load. .

• 480V UNIT SUBSTATION II TABULATION OF LOADS l H1' 1
• KVA LOAD SECTION MOTOR CONTROL CENTER lHl-2 LOCA NO. DESCRIPTION OF LOAD W/LOSP LOSP LOCA SOUTH*

2-D Boron Inj Tank Heater l-SI-TK-2 3 3 3 4-D Control and Relay Room Group No, 2 1.1 1.1 1.1 5-Dl 480V Power Receptacle 5-D2 Aux Bldg Elevator 6-D Hydrogen Recombiner A 9-A Gaseous Waste Blower l-GW-C-3A 10-A Boric Acid Trans Pp l-CH-P-2A 14,3 14.3 14. 3 10-B Aux Bldg Centra Area Exhaust Fan, 1-VS-F-BA 76.5 76.5 76,5 NORTH 1-D Charging Pp Aux Oil Pp 1-CH-P-lA 2-A Aux Feedwater Pp Motor Heater 2 2-D Containment V~cuum Pp 1-CV-P-lA 1.4 3-A Emerg Generator Fuel Oil Pp 1-EE-P-lD (1) (1) (l) 3-B Gaseous Wast2 Blower i-GW-C-2A 3-D Containment I.A. Comp l-IA-C-3A 8 8 8

 /_,,-A Safeguard Area Sump Pp 1-DA.-P-lA                        1.3     1. 3   I. 3 4-D    Recirc Spray Pp Motor Htr                                        2 5-A    Cont Spray Pp Motor Htr                                          2 5-D    Safeguards Area Exh Fan l-VS-F-40A                       8.7     8.7    8.8 6-A    LHSI Pp Motor Htr                                                2 6-D    Recirc Spray Pp Motor Htr                                        2 7-A    Boric Acid Tank A Htr                                    7.5     7.5    7.5 7-D    Boric Acid Tank B Htr                                    7.5     7.5    7.5 8-Dl   4KV Bus lJ Heater                                                7.5 8-D2   Incore Instrument Drive D 10-D    Emerg F,W, Make-up Pp l-FW-P-4A 11-B    Control Rod Cooling Fan l-VS-F-60A                      73.3    73.3   73.3 1-C    Control Rod Cooling Fan l-VS-F-60F                      73.3    73.3   73.3 TOTALS        274.5   293.4  274.5 (1)  Assumed single pump operating, 1-EE-P-lA from previous page.

       *

• 480V UNIT SUBSTATION "lHl TABULATION OF LOADS 11 KVA LOAD SECTION MOTOR CONTROL CENTER lHl-lA LOCA NO, DESCRIPTION OF LOAD W/LOSP LOSP LOCA 1-A Incoming Line Section 1-B Space 1-C Air Compressor No. 1 8.76 8.76 8.76 1-D Air Compressor No. 2 8.76 8.76 8.76 1-El Battery Charger J.45 3.45 3.45 l-E2 Diesel Generator Control Cab. (1) (1) ( 1) l-D2 480V Power Receptacle 1-Fl Lighting Cabinet Cl-7.5 KVA XFMR) 3.75 3.75 3.75 TOTALS 24, 7 24.7 24. 7 (1) Not required when dieGel rur,ning.

                >

       .

• 480V UNI,T SUBSTATION TABULATION OF LOADS II lJ l 1 1
• KVA LOAD SECTION MOTOR CONTROL CENTER lJl-1 L,OCA NO. DESCRIPTION OF LOAD W/LOSP LOSP LOCA 1-C Turning Gear Motor 51. 8 51.8 51.8 2-Al Vepco Test Equip Reep 2-A2 Heat Tracing XFMR Cab 2, 30 KVA 15 15 15 2-B Roadway Lighting 3-Al Rad Monitoring 5 5 5 3-A2 Vital Bus 1-IV FDR 5 5 5 3-Bl Low Pressure CO Sys Refrig 2

3-B2 RSS Trans Cooling Fans 25 25 25 4-B Gen Brg Lift Pump 6.1 6.1 6. J. 4-C Charging Pp Service Wtr Pump 8.0 8.0 8.0 4-D Erner Ger F.O. Pump 1-EE-P-lC 1.1 1.1 1.1 4-E Charging Pp Cooling Wtr Pump 11.1 11.1 11. l 5-Cl Batt Chgr lB-1 (38.8) 19.4 (38.8) 5-C2 Batt Chgr lB-2 5-D Spare 5-E

• Safeguards Duplex Cond Pump l-HS-P-3B 6-A Cont and Rel Rm A/C Cond Pp 1-VS-P-lB (14. 5) (1!+.5) (14.5) 6-B A/C Chiller Pump l-VS-P-2B 19.9 19.9 19.9 6-C Cont and Rel Rm Wtr Chlr 95.6 95.6 95.6 6-D Charging Pp Aux Oil Pp 1-CH-P-lB 6-E MCC lJl-lA Gen Rm No. 3 28.5 28.5 28.5 7-Dl Semi-Vital Bus Feeder 20 20 20 7-D2 FDR 30 KVA Heat Trace XFMR Cab 9 15 15 15 8-D2 FDR 15 KVA Heat Trace XFMR Cab 4 7.5 7.5 7.5 TOTALS 367.9 348.5 367.9

                            *                                    *
                                                                  \

• 480V UNIT SUBSTATION II lJ 111 TABULATION OF LOADS KVA LOAD SECTION MOTOR CONTROL CENTER lJl-2 LOCA HOT Sil NO. DESCRIPTION OF LOAD W/LOSP LOSP LOCA EAST 1-D Cont Air Compressor 11. 2 11. 2 11. 2 2-A Inst Air Compressor (86.0) (86.0) (86.0) 3-B Cont Vac Pp 1-CV-P-lB 1.4 3-C Cont Spray Pp M~r Htr 1-CS-P-lB 2 3-D Safeguards Area Sump Pp 1-DA-P-lB 1.4 1.4 1.4 3-E Stm Gen Aux Fd Pump Mot Htr l-FW-P-3A 2 4-D Recirc Spray Pp Mtr Htr 1-RS-P-lB 2 5-D Recirc Spray Pp Mtr Htr 1-SI-P-lB 2 6-D Hydrogen Rec B 7-D Lo Hd Saf Inj Mot Htr 1-SI-P-lB 2 8-D Recirc Spray Pp Mot Htr l-RS-P-2B 2 9-C Boric Acid Tk.Htr l-CH-E-6C 7.5 7.5 7.5 9-Dl 4Kv Swgr Bus H Htr FDR 7.5 9-D2 Incore Inst Jrive 11 E11 5

10-C Control Rod Drive Coolin~ Fan l-VS-F-60C 73.3 73.3 73.3 WEST 1-Dl Personnel Hatch l-D2 Mn Air Dryer 1-IA-D-l 2.8 2.8 2.8 2-D Charging Pp Aux Oil Pump 1-CH-P-lC 3-D Boron Inj Tank Htr l-SI-TK-2 3* 3 3 4-D2 Cont Air Compressor Dryer l-IA-D-2 2 2 2 6-B Erner Make-Up Pp l-FW-P-4B 8-D Control Rod Drive Cooling Fan l-VS-F-60D 73.3 73.3 73.3 9-D Blower l-GW-C-3B 9-E Safeguards Supply HV Unit l-VS-HV-4 15.5 15.5 15.5 10-B Boric Acid XFER Pump 14.3 14.3 14.3

)-C    Aux Bldg Central Exh Fan l-VS-F-8B                         76.5    76.5      76.5
                                                                                 .,

TOTALS 366.8 392. 7 366.8

lia-- ~-. *~480V UNIT SUBSTATION "lJ 1 11

• TABULATION OF LOADS KVA LOAD SECTION MOTOR CONTROL CENTER lJl-lA LOCA NO. DESCRIPTION OF LOAD W/LOSP LOSP LOCA 1-A Incoming Line 1-B Filler 1-C Space 1-D Air Compressor No. 1 1-El Diesel Generator Control Cab.

8.76 (1) 8.76 (1)

                                                                                     .(1)8. 76 l-E2         Spare 1-Fl         Battery Charger                                      3 .45      3.45     3.45
*l-F2         480V Power Receptacle 2-A          Space 2-B          Air Compressor No. 2                                 8.76       8. 76    8.76 2-C          Space 2-Dl         Lighting Cabinet 1 S9                                3.75       3.75     3. 75 2-D2         Lighting Cabinet lS10                                3.75       3.75     3.75 TOTALS    28.45      28 .1,5  28 .L;5 (1) Not required when diesel runG1ng.
                     *'

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