415V (DA) bus charging from bus coupler/ Normal incomer

415V (DA) bus charging from bus coupler/ Normal incomer

Bus charging from bus coupler (Only done from Electrical control panel at UCB) :-

1. Select 415v bus coupler breaker
2. Select I/C-A or I/C-B in trip selection (Select the incomer which we want to trip).
3. Put Key (synch selection) in position “1 - check “.
4. Switch ON synchroscope by putting switch in position “2”.
5. If IN PHASE lamp (green LED) glows. Go to step-6. If OUT OF PHASE (RED LED) Glows
check for voltage/frequency difference & inform to EMD.
6. Close Circuit breaker (control switch position “2”). Bus coupler breaker will close &
incomer (which is selected in trip selection) will trip.
7. Change over completed, Switch OFF synchro scope & put key in “0 – OFF” position.
8. Deselect bus coupler .
9. Reset all by pressing Control reset.

Bus charging from normal incomer (Only done from Electrical control panel at UCB) 

1. Select 415 V Incomer breaker ( incomer-1/ incomer-2)
2. Select Bus coupler in trip selection.
3. Put Key (synch selection) in position “1 - check “.
4. Switch ON synchroscope by putting switch in position “2”.
5. If IN PHASE lamp (green LED) glows. Go to step-6. If OUT OF PHASE (RED LED) Glows
check for voltage/frequency difference & informed to EMD.
6. Close Circuit breaker (control switch position “2”). Incomer will close & Bus coupler
breaker will trip.
7. Change over completed, Switch OFF synchroscope & put key in “0 – OFF” position.
8. Deselect incomer breaker ( incomer-1/  incomer-2).
9. Reset all by pressing Control reset.