Figure 43 module start- up procedures screens, 10 shutdown procedures screen, Figure 43 ) – Liebert 1000kVA User Manual
Page 62
Operation
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Figure 43 Module start- up procedures screens
Prior to this procedure, supply power to the critical load through the bypass line (at the SCC). When
you close the UPS module input breaker, power is provided to the UPS rectifier. The module DC bus
voltage ramps up to the nominal battery voltage and the UPS inverter turns on when the DC bus
reaches the proper voltage. You can then close the battery circuit breaker (MBD) and the UPS module
output circuit breaker to place the UPS module on-line.
Refer to 3.4.1 - SCC Start-Up Procedure for more details.
3.2.10 Shutdown Procedures Screen
Go to the SCC Master Menu and move the cursor to SHUTDOWN PROCEDURES. Press the Select
pad and the SCC Shutdown Procedures screen is displayed.
This screen contains the steps you must follow to perform a controlled shutdown of the UPS system.
The instructions are listed so you can review them before performing the controlled shutdown.
START-UP PROCEDURES
1.
Verify that the control power is applied to the system control cabinet (check the display
on the system control cabinet).
2.
Wait approximately two (2) minutes before attempting any other action .
3.
Select "SYSTEM CONFIGURATION" screen to verify that the correct model is
displayed.
4.
Select "WALK-IN" screen and do the following:
a)
Close module input circuit breaker. Verify that the DC voltage bar on
the display begins to gradually move to the right and the AC input
current bars do not move to the right more than 10% (40% for modules
with input filters) after the transformer inrush has subsided.
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START-UP PROCEDURES (Cont'd)
b) Verify that the output voltage bar moves to the right after the DC
bus bar has reached the 90% point. Both bars should settle near
their respective 100% levels.
c)
If anything happens on the display not mentioned in (a) or (b),
immediately open the module input circuit breaker and investigate.
5.
If step 4 is successful, select "MONITOR/MIMIC" screen and verify module
DC bus and output voltages are at proper nominal level. If so, close
module battery circuit breaker.
6.
If no alarms are present on the "MONITOR/MIMIC" screen, the module may be
placed online by closing the module output breaker.
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© 1989-2003
© 1989-2003