4. Emergency generator operation in manual

THE FOLLOWING DESCRIBES HOW TO PUT THE EMERGENCY GENERATOR NOT OPERATION IN MANUAL MODE WHEN POWER IS NOT SUPPLIED FROM THE MAN SWITCHBOARD (MSBD),

4-1. INITIAL CHECK-OUT

1) THE DIESEL ENGINE FOR EMERGENCY GENERATOR IS READY TO START.

2) "EMERGENCY SWITCHBOARD" BREAKER ON MSB SYNCHRO PANEL IS OPEN

3) THE VOLTAGE REGULATOR (VR) FOR THE EMERGENCY GENERATOR IS IN THE SPECIFIED POSITION. SEE THE GENERATOR MANUFACTURER'S MANUAL FOR FULL INFORMATION.

4-2. ENGINE START

ON SATISFACTORY CONFIRMATION OF THE ABOVE CHECK ITEMS, PRESS THE PUSH BUTTON "ENG, START" TO START THE DIESEL ENGINE.

4-3. VOLTAGE ESTABLISHMENT

AS THE ENGINE APPROACHES A SYNCHRONOUS SPEED, THE GENERATOR VOLTAGE BUILDS UP AND "GEN. RUN" LAMP TURN ON BRIGHTER.

4-4. VOLTAGE CHECK AND ADJUSTMENT

OPERATE THE "VOLT & FREQUENCY METER" SWITCH TO EACH PHASE- TO-PHASE AND CONFIRM THAT THE GENERATOR IS GENERATING THE RATED VOLTAGE.

IF THE GENERATOR VOLTAGE IS OTHER THAN THE RATED, ADJUST IT TO THE RATED VALUE WITH THE VOLTAGE REGULATOR(VR), THIS VR IS LOCATED INSIDE THE ESB GENERATOR PANEL. SEE THE GENERATOR MANUFACTURER'S MANUAL FOR FULL INFORMATION,

4-5. FREQUENCY CHECK

OPERATE THE "VOLT & FREQUENCY METER" TO EACH PHASE-TO-PHASE AND CONFIRM THAT THE GENERATOR IS RUNNING AT THE RATED FREQUENCY,

4-6. FEEDING TO LOADS

SET THE "VOLT & FREQUENCY METER" SWITCH TO BUS POSITION AND CONFIRM THAT ESB BUS IT DEAD(OV), THEN OPERATE 'ACB CONTROL" SWITCH(AO/AC) TO CLOSE POSITION TO CLOSE THE EMERGENCY GENERATOR ACB, CONFIRM THAT ESB BUS IS NOW EMERGIZED TO THE RATED GENERATOR VOLTAGE, THEN CLOSE THE NECESSARY FEEDER CIRCUIT BREAKERS.

4-7. ENGINE STOP

AFTER THE EMERGENCY GENERATOR IS REMOVED FROM THE BUS BY OPENING ITS ACB, PRESS THE PUSHBUTTON "ENG. STOP" TO STOP THE DIESEL ENGINE.

5. Automatic start-stop control of emergency generator

5-1. SUMMARY

THE EMERGENCY SWITCHBOARD SYSTEM IS NORMALLY SUPPLIED FROM THE MAIN SWITCHBOARD.

IF TROUBLE OCCURS TO THE MAIN SWITCHBOARD SIDE, THE EMERGENCY GENERATOR WILL BE AUTOMATICALLY STARTED TO FEED THE EM'CY LOADS.

5-2. NECESSARY PREPARATION FOR AUTOMATIC STARTING

1) “OPERATION" SWITCH ON EG AUTO START PANEL IS IN AUTO POSITION,

2) THE EMERGENCY GENERATOR VOLTAGE REGULATOR(VR) IS IN THE SPECIFIED POSITION. SEE THE GENERATOR MANUFACTURER'S MANUAL FOR FULL INFORMATION,

3) THE EMERGENCY GENERATOR ENGINE IS READY TO START.

5-3. AUTOMATIC STARTING

SHOULD THE EMERGENCY SWITCHBOARD(ESBD) BUS DE-ENERGIZED OR ITS VOLTAGE DROP BELOW THE PREDETERMINED VALUE AND IF THIS CONDITION IS NOT RESTORABLE FOR 30 SECONDS FROM THE MAIN SWITCHBOARD(MSBD) SIDE DUE TO NO MAIN GENERATOR STAND-BY SELECTION OR, WHEN SELECTED, DUE TO STAND-BY START FAILURE OR SIMILAR TROUBLE, THE EMERGENCY GENERATOR (EG) WILL BE AUTO¬MATICALLY STARTED, AFTER THIS AUTO START OF THE EG WITH ITS VOLTAGE BUILD-UP 95% OR MORE OF THE RATED VALUE, THE GE WILL RESISTOR THE ESSENTIAL SERVICES.

5-4. AUTOMATIC DISCONNECTION

IF THE MSB BUS IS RESTORED TO NORMAL VOLTAGE WHILE THE ESSENTIAL SERVICES ARE SUPPLIED BY THE EG, THE EG ACB TRIP SIGNAL WILL BE AUTOMATICALLY SENT TO THE EG ACB TO TRIP. AND THE BUS-TIE BREAKER ON THE EM'CY GEN PANEL WILL BE CLOSED IN INSTANT, RESULTING IN FEEDING FROM THE MSB TO THE ESB,