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HV Control Panel

Alternave Seng Default (x) Parameter Customer Seng

-20V,(0V),+20V SupplyvoltageCable(004)

1-1,6A PrimaryAutoFuseF2Seng A

5.4.8 Motor Protector (F7) Sengs

ThiscontrolpanelstartsthemotorwithaY/Dstarter,whichmeansthatthemotorstarts

inYmodewithreducedvoltageonthewindings.Aconsequenceofthelowvoltageisthe

torqueisalsoreduced.Thismeansthatthesizeofthemainfusedoesnotneedtobeasbig

asinaDOLstarter.

TosettheMotorOverloadProtector,ndtheMotorRatedLoadCurrent.ThisdataID

isalreadycollected,seeTable 5-4: VAC/RBU Motor Data.Ifthisdatahasnotbeennot

collected,itcanbefoundontheMotorMarkingPlate.

Example of how to calculate the motor protecon current seng.

Onthemotormarkingplateatleasttwo-amperevaluesareavailable,one(Y)Star-running

mode,andonefor(D)Delta-runningmode:

Motor

XXXXX - XXXX XXXX

Typ XXXX

3 - Mot. Nr. XXXXX-XX

∆ Y 400/690 V 63,0/36,5 A

S1 37 kW cos φ 0,91

2970 rpm 50 Hz

Iso. KL F IP 54 t

Y/D=Y/∆ (∆/Y400V/690VD/Y->63,0/36,5A)

Withthismotor,theNominalPowersupplyVoltageis400V;itisthesamevoltageasin

∆Delta-runningmode=400V.

Ratedloadcurrentis=∆Delta-runningmodecurrent=63A.

(D)Delta-runningmode->400V->63A.

(Y)Star-runningmode->690V->36,5A.

Motorprotector(F7)seng=63,0x0,58=36,54or36,5A.

Checkyourcalculaonbycomparing,(Y)Star-runningmodecurrent=36,5Awithyour

calculatedMotorprotector(F7)sengvalue=36,54A,ithastobemoreorlessequal.

Table5-6:MotorProtector(F7)Sengs

Tripp Class

(10),15,20

Reset (Manual)/Auto 37kW 9-45A 45-55kW 18-90A Customer Seng

10 Manual

Default=9 Default=18

Power supplies Motor

380V50/60Hz MotorvoltageStar/DeltaY690V/D400V

400V50Hz MotorvoltageStar/DeltaY690V/D400V

Nederman HV Control Panel EX Series User Manual

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