pfc operating catalogue

SecuRite APFCS

Automatic Power

Factor Correction System

2Range

OutputRating:15-350kVAr(OtherkVArratingonrequest)

VoltageRating:440V

Ref. Standard

IEC61921/IS8623

Salient Features

CorrectiontoUnitPowerFactor. ModularDesignwhichallowseasierassembly,

installationandmaintenancebytheuser. Designedtominimizeinstallationtimeandcost. AdvancedMicroprocessorrelay TheincomerMCCBprovidedhasupto35KAfault

interruptingcapability. ManualCapacitorSwitchingCapability. IndicatinglightforCapacitorstagedisplay. IndustrialDuty,SafetydisconnectsMetallizeddielectric

capacitors,lessthan0.2wattsperkVArlosses. ColourSiemensGreyRAL. Specialcableusedhenceitcanwithstandtemperature.

Introduction

ModernPowernetworkcatertoawidevarietyofelectricalandpowerelectronicloads,whichcreateavaryingpowerdemand on the supply system. It therefore becomespractically difficult to maintain a consistent power factorbytheuseoffixedcompensationi.e.fixedcapacitortobemanuallyswitchedONandOFFtosuitthevariationoftheload.Thiswill lead to situationwhere the installationcanhavea lowpowerfactorcausinghigherdemandchargesandlevyofpowerfactorpenalties.Inadditiontonotbeingabletoachievethedesiredpowerfactor that the use of fixed compensation can resultin leading power factor under certain load conditions,

which is unhealthy for the installation as it can result inover voltages, saturation of transformers, mal-operationof diesel generating sets, penalties by electricity supplyauthoritiesetc.Itisthereforenecessarytoautomaticswitchingoperationofthesuitablecapacitordependingupontheloadfluctuationswithout manual intervention. This compensation is bestsuitedtotheloadrequirements.It can be achieved by using Automatic Power FactorCorrection(APFC)Systemwhichcanmaintainconsistentlyhighpowerfactor,withoutleadingpowerfactoroperation.

StepSwitching. CapacitorDutyContactorwithdumpingresistance. SwitchoptionAutoorManual. Busbarismadeofcopper. ProvisionofRotorhandleforincomerMCCB.

Principle Operation

TocontinuouslysenseandmonitortheloadconditionsbytheuseoftheexternalCT(whoseoutputisfedtothecontrolrelay).

ToautomaticallyswitchONandswitchOFFrelevantcapacitorstepstoensureconsistentpowerfactor.

Toensureeasyuserinterfaceforenablingreliableunderstandingofsystemoperation,suchasdisplayofrealtimepowerfactor,numberofswitchingoperationscarriedoutetc.

Toprotectagainstanyelectricalfaultsinamannerthatwillensuresafeisolationofthepowerfactorcorrectionequipment.

- Automatic Power Factor Correction Sys-

3Principle of Reactive Energy Management

ActivePower(kW) It is power used by the loads to meet the functional

outputrequirement

Reactive Power (kVAr)

Itispowerusedbytheloadstomeetitsmagneticfieldequipmentsandtherequirementsofmagneticlosses

The reactive power is always 90 out of phase withrespectstotheactivepower

TheunitnormallyusedtoexpressthereactivepowerisVAR(inpracticalusagekVAr)

TheapparentpowerkVAisthevectorsomeofactiveandreactivepower

Power Factor Correction

Capacitorsaremostcosteffectiveandreliablestaticdeviceswhich can generate and supply reactive power (energy).Capacitors consume virtually negligible active power andabletoproducereactivepowerlocally,thusenablingPowerFactorCorrectionforinductiveloads.

Thevectordiagramgivenasidesummarizetheconceptofpower factor correction/ improvement by reactive powercompensationwithcapacitors.cosf1=Initialpowerfactorcosf2=TargetpowerfactorkVA2

4Savings on the electricity bill

DecreaseinkVAdemand Eliminatepenaltiesonreactiveenergy Reducepowerlossintransformers

Example: Copperloss=(PF1/PF2)2xFullloadLossreductionina630kVAtransformer Copperloss=(0.7/0.98)2xFullloadPW=6500W(assumed)withaninitialPowerFactor=0.7 =(0.7/0.98)2x6500Withpowerfactorcorrectionweobtainafinalpower =3316Wfactor=0.98 Savings =6500W3316WThelossesbecome:3316Wi.e.areductionof49% =3183W

Increase in available power

Ahighpowerfactoroptimizesanelectricalinstallation.FittingPFCequipmentonLowVoltagesideoftransformersincreasesavailablepoweratsecondaryofLVtransformers.The table shows the increased available power at thetransformeroutputbyimprovingpowerfactorfrom0.7to1.Example :

CalculationforadditionalloadinKWthatcanbeconnectedbyimprovingPowerFactorLoad =500kVAInitialPF(cosf1) =0.7TargetPF(cosf2) =0.95cosf1 =kW1/kVAkW1 =kVAxcosf1 =350kWkW2 =kVAxcosf2 =475kWAdditionalkWthatcanbeconnected =475-350 =125kW%ofadditionalload =125/350x100 =36%

PowerFactor Additionalavailable

power(kW)

0.7 0%

0.8 +14%

0.85 +21%

0.90 +29%

0.95 +36%

1.00 +43%

ReductioninElectricitybill

ReductioninkVArDemand

ReductioninkVADemand

ReductioninSwitchgearRating

Reductioninlinelosses/Cablelosses

Reductioninvoltageregulations

ReductioninLineCurrent ReducedLoadingonTransformer

Benefits of Reactive Energy Management

ByprovidingproperReactivemanagementsystemstheadverseeffectsofflowofreactiveenergycanbeminimized Followingtableprovidessomeofthebenefitsofreactiveenergy.

5Calculation of Capacitor ratings kVAr

ForIndustrial/DistributionNetworksInelectricalinstallations,theoperatingloadkWanditsaveragepowerfactor(PF)canbeascertainedfromelectricitybill.

Alternativelyitcanbeeasilyevaluatedbyformula AveragePF=kWH/kVAH OperatingloadkW=kVAdemandxAveragePF TheaveragePFisconsideredastheinitialPFandfinalPFcanbesuitablyassumedastargetPF.TherequiredCapacitorkvarcanbecalculatedasshowninexample:InitialPF0.85,TargetPF0.98,KVAR=kWxmultiplyingfactor=800x0.417=334kVArrequired.

Calculation of Capacitor Rating-kvar

Initial P.F Target P.F

0.9 0.91 0.92 0.93 0.94 0.95 0.96 0.97 0.98 0.98

0.4 1.807 1.836 1.865 1.896 1.928 1.963 2 2.041 2.088 2.149

0.42 1.676 1.705 1.735 1.766 1.798 1.832 1.869 1.91 1.958 2.018

0.44 1.557 1.585 1.615 1.646 1.678 1.712 1.749 1.79 1.838 1.898

0.46 1.446 1.475 1.504 1.535 1.567 1.602 1.639 1.68 1.727 1.788

0.48 1.343 1.372 1.402 1.432 1.465 1.499 1.536 1.577 1.625 1.685

0.5 1.248 1.276 1.306 1.337 1.369 1.403 1.44 1.481 1.529 1.59

0.52 1.158 1.187 1.217 1.247 1.28 1.314 1.351 1.392 1.44 1.5

0.54 1.074 1.103 1.133 1.163 1.196 1.23 1.267 1.308 1.356 1.416

0.56 0.995 1.024 1.053 1.084 1.116 1.151 1.188 1.229 1.276 1.337

0.58 0.92 0.949 0.979 1.009 1.042 1.076 1.113 1.154 1.201 1.262

0.6 0.849 0.878 0.907 0.938 0.97 1.005 1.042 1.083 1.13 1.191

0.62 0.781 0.81 0.839 0.87 0.903 0.937 0.974 1.015 1.062 1.123

0.64 0.716 0.745 0.775 0.805 0.838 0.872 0.909 0.95 0.998 1.058

0.66 0.654 0.683 0.712 0.743 0.775 0.81 0.847 0.888 0.935 0.996

0.68 0.594 0.623 0.652 0.683 0.715 0.75 0.787 0.828 0.875 0.936

0.7 0.536 0.565 0.594 0.625 0.657 0.692 0.729 0.77 0.817 0.878

0.72 0.48 0.508 0.538 0.569 0.601 0.635 0.672 0.713 0.761 0.821

0.74 0.425 0.453 0.483 0.514 0.546 0.58 0.617 0.658 0.706 0.766

0.75 0.398 0.426 0.456 0.487 0.519 0.553 0.59 0.631 0.679 0.739

0.76 0.371 0.4 0.429 0.46 0.492 0.526 0.563 0.605 0.652 0.173

0.78 0.318 0.347 0.376 0.407 0.439 0.474 0.511 0.552 0.599 0.66

0.8 0.266 0.294 0.324 0.355 0.387 0.421 0.458 0.499 0.547 0.608

0.82 0.214 0.242 0.272 0.303 0.335 0.369 0.406 0.447 0.495 0.556

0.84 0.162 0.19 0.22 0.251 0.283 0.317 0.354 0.395 0.443 0.503

0.85 0.135 0.164 0.194 0.225 0.257 0.291 0.328 0.369 0.417 0.477

0.86 0.109 0.138 0.167 0.198 0.23 0.265 0.302 0.343 0.39 0.451

0.87 0.082 0.111 0.141 0.172 0.204 0.238 0.275 0.316 0.364 0.424

0.88 0.055 0.084 0.114 0.145 0.177 0.211 0.248 0.289 0.337 0.397

0.89 0.028 0.057 0.086 0.117 0.149 0.184 0.221 0.262 0.309 0.37

0.9 0 0.029 0.058 0.089 0.121 0.156 0.193 0.234 0.281 0.342

0.91 0 0.03 0.06 0.093 0.127 0.164 0.205 0.253 0.313

0.92 0 0.031 0.063 0.097 0.134 0.175 0.223 0.284

0.93 0 0.032 0.067 0.104 0.145 0.192 0.253

0.94 0 0.034 0.071 0.112 0.16 0.22

0.95 0 0.037 0.078 0.126 0.186

Multiplication Factor Table

6Technical Data & Limit Values

Details RatingPowerRating 15kVAr 25-50kVAr 75-150kVAr 175-250kVAr 275-350kVAr

RatedVoltage 3phase415V-20%to10%

3phase415V-20%to10%

3phase415V-20%to10%

3phase415V-20%to10%

3phase415V-20%to10%

Frequency 50Hz+/-3% 50Hz+/-3% 50Hz+/-3% 50Hz+/-3% 50Hz+/-3%

ProtectionwhenVoltagesensingfails

CCurve CCurve CCurve CCurve CCurve

Alarmswithrelayoutput OC,OV,UnderCompensation

OC,OV,UnderCompensation




ToleranceinkVAR 3.5 3.5 7 8.75 8.75

CorrectedPF 1.0 1.0 1.0 1.0 1.0

CapacitorBankONindication

Byindicationlamps Byindicationlamps Byindicationlamps

Byindicationlamps Byindicationlamps

kVAR/currentmeterforCapacitor

Optional-ICDMake Optional-ICDMake Optional-ICDMake

Optional-ICDMake Optional-ICDMake

Displayofset/actualvalues

PFandkVAR PFandkVAR PFandkVAR PFandkVAR PFandkVAR

PanelTemperatureRise 20degreeCaboveambient

20degreeCaboveambient




PanelEnclosure IP20,ForceCooled IP20,ForceCooled IP20,ForceCooled IP20,ForceCooled IP20,ForceCooled

ShortCircuitRating upto35kA

OverVoltage

105%Continuous

110%for8HoursDaily

120%for5Minutes

130%for1Minute

OverCurrent 200%theRatedCurrentContinuously

Duty Continuous

PowerSupply Threephase,fourline

Relayvoltageinputsignal Tappedinternally

Relaycurrentinputsignal --/5A,fromCTonline

Ambienttemperature -5Cto+40C

Altitude 1000metresaboveSealevel

Incomer AthreepoleMCCB,UsingFRLScable,ofadequatesection

Internalwiring Cylindrical,drytypethreephaseunits(seetableforstepratings)

Capacitors MPP-SH,NormaldutycylindericalwithoverpressureDisconnector&DischargeResistor.

Contactors ThreepoleCapacitordutycontactorsofadequateratingsforrespectivesteps

Relay Amicroprocessorbasedrelaywith4,8&12outputcontactsforswitchingcontactors

ControllerProtection

HavingPFindication,builtintimedelays,andalarmindicationforCTreversalapartfromtheprotectionsassociatedwiththecapacitoritself,thereisathermostatwhichdisconnectstheentirepanelintheeventofexcessivetemperatureriseintheenclosure.Asasafetymeasure,aninterlockisprovidedsothatwhenthefrontdoorisopened,theentirepanelwilltrip.

7Tab

le o

f Ste

p R

atin

g

Cap

acito

r S

tep

in k

VAR

with

Cap

acito

r D

uty

Con

tact

or a

nd M

CB

/ M

CC

B R

atin

g

Step

1St

ep 2

Step

3St

ep 4

Step

5St

ep 6

Step

7St

ep 8

Step

9St

ep 1

0St

ep 1

1St

ep 1

2

kVAr Rating

Incomer

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

Capacitor

Contactor

MCCB

C1CC

MC

C2CC

MC

C3CC

MC

C4CC

MC

C5CC

MC

C6CC

MC

C7CC

MC

C8CC

MC

C9CC

MC

C10

CCM

CC1

1CC

MC

C12

CCM

C

1563

A1

126

212

65

1210

712

16

2512

5A1

126

112

62

1210

312

103

1210

412

165

1216

712

16

5012

5A1

126

212

63

1210

412

105

1216

7.5

1225

12.5

2032

1520

32

7525

0A1

1216

112

162

1216

312

163

1216

412

165

1216

712

2510

2025

1520

3225

5063

100

250A

112

162

1216

312

163

1216

412

165

1216

712

167.

512

2510

2025

12.5

2025

2030

3225

5063

125

315A

112

161

1216

212

163

1216

412

167.

512

2510

2025

12.5

2032

1520

3220

3032

2550

6325

5063

150

400A

112

162

1216

312

165

1216

7.5

1225

1020

2512

.520

2515

2032

2030

3225

5063

2550

6325

5063

175

630A

112

162

1216

512

1610

2025

12.5

2025

1520

3215

2032

2030

3220

3032

2550

6325

5063

2550

63

200

630A

312

165

1216

7.5

1225

1020

2515

2032

2030

3220

3032

2020

2525

5063

2550

6325

5063

2550

63

225

630A

312

167.

512

2510

2025

1520

3220

3032

2030

3225

5063

2550

6325

5063

2550

6325

5063

2550

63

250

630A

512

1610

2025

1520

3220

3032

2550

6325

5063

2550

6325

5063

2550

6325

5063

2550

6325

5063

275

800A

312

165

1216

712

2510

2025

1520

3215

2032

2030

3225

5063

2550

6350

5063

5050

6350

5063

300

800A

312

165

1216

712

2510

2025

1520

3215

2032

2030

3225

5063

5050

6350

5063

5050

6350

5063

325

800A

512

167

1225

12.5

2025

1520

3215

2032

2030

3225

5063

2550

6350

5063

5050

6350

5063

5050

63

350

800A

512

1610

2025

1520

3220

3032

2550

6325

5063

2550

6325

5063

5050

6350

5063

5050

6350

5063

8Capacitor Bank

Cooling Fan

Panel Lock

Current TransformerEarthing Screw

Neutral Assembley

Rotary Handle

Outgoing MCB / MCCB

CRCA Sheet Steel Cable Alley

Control System

9Contactor Section

Capacitor Bank

Base Chanel

Incomer MCCB

CRCA Sheet Steel Enclosure

CRCA Sheet Steel Cable Alley

Busbar Assembley

16

GA Drawings 15 KVAr

Side Front

Bottom

Foundation

17

SideFront

Foundation

GADrawing25to50KVAr

Bottom

18

GADrawing75to350KVAr

R Y B

Volt Meter

IPFC Relay

Amiter

MCCB

Side Front

Bottom

Foundation

280

19

Ordering Information

Description- With Normal Duty(Hercules) Capacitor Product Code

15KVAr/440VStandardAPFCPanelND QHCTRB5015X0















Description-WithHeavyDuty(Phantom)Capacitor

15KVAr/440VStandardAPFCPanelHD QHKTRB5015X0















Note: Manual version also available

ZHILE0

0004

/DEC

12/APR14

Regional & Branch Offices:

NORTH - REGIONAL OFFICE: Corporate Office:QRGTowers,2D,Sector-126,Expressway,Noida-201304,Tel:0120-3331000,Delhi: Tel:011-47676700,23888200,Chandigarh:Tel:0172-4232400-401,Dehradun: Tel:0135-6670202,Noida / Haryana:Tel:0120-3331000,Ludhiana:Tel:0161-4676001/6024,

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CIN-L31900DL1983PLC016304.

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