Starting The Ups In Bypass Mode - Eaton Powerware 9315 UPS Powerware 9315 Installation And Operation Manual

UPS OPERATING INSTRUCTIONS
9.3

Starting the UPS in Bypass Mode

9-4
EATON Powerware
13. If system is equipped with motor operated breaker CB2, proceed to Step 14;
otherwise, proceed to Step 16.
14. Confirm UPS Battery Breaker CB2 has closed by viewing the breaker position on
the LCD Mimic screen.
The inverter and output/inverter cooling blowers turn on. When the inverter
reaches full voltage, UPS breaker CB3 closes and breaker CB4 opens supplying
power to the critical load. It takes less than one minute for the UPS to achieve
Normal mode. If UPS is not in Automode, turn the Mode key switch to NORMAL
for one second to transfer UPS to Normal mode.
15. Proceed to Step 18.
16. When the UPS Battery Disconnected alarm and notification is received, close
UPS Battery Disconnect CB2.
17. On the UPS, turn the Mode key switch to NORMAL for one second.
The inverter and output/inverter cooling blowers turn on. When the inverter
reaches full voltage, UPS breaker CB3 closes and breaker CB4 opens supplying
power to the critical load. It takes less than one minute for the UPS to achieve
Normal mode. If UPS is not in Automode, turn the Mode key switch to NORMAL
for one second to transfer UPS to Normal mode.
18. The UPS system is now operating in Normal mode.
To start the UPS when the inverter output of the UPS is not available and the critical
load needs to be energized:
1. Verify that the UPS circuit breakers are set as follows:
UPS Input Breaker (CB1)
UPS Battery Breaker or Battery Disconnect (CB2)
UPS Output Breaker (CB3)
UPS Bypass Breaker (CB4)
Backfeed Protection Breaker (FBP)
2. Close the UPS Bypass input feeder circuit breaker. Breakers CB4 and FBP close
as soon as charged. If the breakers do not close, turn the Mode key switch to
BYPASS for one second.
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
indicator on the UPS control panel indicates the UPS is in Bypass mode.
3. The UPS system is now operating in Bypass mode. No backup is available.
® 9315 UPS (500–750 kVA) Installation and Operation Manual
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