Powerware 5075 kVA - Manual (Page 76)

68 Powerware BPIII Harsh Environment UPS 50--75 kV Installation and Operation
164291261 Rev. F 111503
To Cold Start the UPS from Battery (No AC Input Power):
To start the UPS system when commercial power is not available, perform the
following procedure:
1. Ensure the feeder breaker is open (no input or bypass power available).
2. Place the BATTERY switch in the NORMAL position.
3. Place the MODE switch in the NORMAL position.
4. Ensure the Emergency Power Off PUSH TO RESET pushbutton is pressed in.
5. Close input breaker CB1.
6. Place Power Switch S1 (located in the environmental cabinet) to the ON
position.
Logic power comes on for all PCBs and Horn sounds every 2 seconds.
7. The following UPS messages are displayed on the Monitor Panel LCD screen:
Status: Load Off
Alarm: Converter Offline
Notice: Bypass AC Under Voltage
Output AC Under Voltage
Converter in Shutdown
8. Monitor the LCD meter screen for battery voltage.
9. Press and hold Cold Start switch S2.
The converter K1 contactor closes after 5 seconds.
LCD meter screen should indicate 120 to 130 VDC.
The following message appears on the screen:
Notice: OK to Close CB2
Converter In Startup
10. Close battery breaker CB2.
11. When the DC reaches 250 VDC, the converter starts.
The DC walks up to 540 VDC.
The inverter starts.
K3 closes.
All fans and blowers are functional.