Powerware 5075 kVA - Manual (Page 74)

66 Powerware BPIII Harsh Environment UPS 50--75 kV Installation and Operation
164291261 Rev. F 111503
Operation
The following sections describe how to operate the controls to start, stop, or
change the operating mode of the UPS.
To Place the UPS in Normal Mode:
1. Close BIB circuit breaker.
2. Close CB1 circuit breaker.
3. Turn the BATTERY switch to NORMAL.
4. Turn the MODE switch to NORMAL.
5. Ensure the Emergency Power Off PUSH TO RESET pushbutton is pressed in.
6. Turn the START switch to the right momentarily.
After the rectifier reaches 540 VDC, the DC to DC converter begins to turn on.
After the converter reaches full voltage, the OK To Close CB2 notice is
displayed on the Monitor Panel LCD screen.
7. When the OK To Close CB2 notice is displayed on the Monitor Panel LCD
screen, close circuit breaker CB2.
The inverter begins to turn on. When the inverter reaches full voltage, it turns
on and supplies power to the critical load.
If a bypass source is available when you turn the START switch on, the critical
load is immediately supplied by the bypass source in Bypass mode until the
inverter turns on and the UPS transfers to Normal mode. The status indicators
on the Monitor Panel indicate when the UPS is in Bypass mode and Normal
mode.
To Shut Down the UPS from Normal Mode:
1. Turn the MODE switch to BYPASS.
The UPS switches to Bypass mode. If the bypass source is not available, the
power processor remains on and an alarm sounds.
2. When the transfer is complete (the LCD screen reads On Bypass), move the
CB2 breaker switch to OFF. Then move the CB1 breaker switch to OFF.
The bypass source supplies the critical load and the power processor
de-energizes. The Bypass mode indicator illuminates on the Monitor Panel.