Operation
STEP 1 (Start-Up Procedure)
Before you apply power to the UPS modules, determine the position of the following circuit breakers and switches:
a.Rectifier Input Breaker (RIB) - If this external circuit breaker is closed, you already have power to the UPS cabinet and possibly power to the controls. If this breaker is closed, leave it closed. If it is open, leave it open until you are ready to apply power to the UPS cabinet.
b.Bypass Input Breaker (BIB) - If this external circuit breaker is closed, you may already have power to the critical load through the bypass line. If this breaker is closed, leave it closed. If it is open, leave it open until you are ready to energize the bypass line.
c.Input Circuit Breaker (CB1) - Verify that this breaker on the front of the UPS cabinet (Figure 3) is in the OFF position.
d.Module Battery Disconnect (MBD) - Verify that this external breaker is open or tripped. If you are using battery cabinets, verify that breakers on all the cabinets are open.
e.Bypass Circuit Breaker - This motorized circuit breaker (Figure 50 or Figure 51) should be closed unless you are recovering from a Remote Emergency Power Off. You may already be supplying power to the critical load through this breaker. If this breaker is open, you will be instructed to reset it after Control Power is available.
f.Output Circuit Breaker - This motorized circuit breaker (Figure 50 or Figure 51) should be open.
g.Static Switch Disconnect Fuses - A pair of fuses labeled Static Disconnect (typically F21 and F22) is located near the static switch assembly. These fuses should be ON (pushed in) unless the system is recovering from a shutdown.
h.Control Power - The fuses labeled Control Disconnect should be ON (pushed in) unless you are recovering from a maintenance shutdown. If control power is OFF (fuseholders pulled open), leave it OFF until you are ready to apply power to the UPS controls.
NOTE
If the system was shut down in response to an “Emergency Off,” there may be alarm messages on the LCD screen that describe system conditions before (or at the time of) the shutdown. Some or all of the alarm conditions may have already been resolved. To clear these alarm messages, turn off the control power (see Figures 3 andFigures 4). Wait at least ten minutes for the control power circuitry to completely
! CAUTION
If you are recovering from a UPS system shutdown for maintenance procedures, verify that all of the UPS system doors are closed and latched. All test equipment must be removed from the system. All electrical connections must be secure.
STEP 2 (Start-Up Procedure)
Power must be provided to the UPS controls so the operator can use the LCD and so the system logic can perform its control functions. Note that you can use the LCD to monitor UPS system status, even when the UPS modules are not operating. This will be the usual condition unless you are recovering from a maintenance shutdown.
If the LCD screen is not operating, energize Control Power by operating the following two controls:
a.Close the Rectifier Input Breaker (RIB) which is outside the UPS cabinet. This will provide power to the UPS cabinet but not to any UPS components.
b.Open the UPS cabinet door and verify that the two fuseholders marked Control Disconnect are ON (pushed in). If not, push in both fuseholders now to turn Control Power ON. Close the UPS cabinet door.
NOTE
Wait two minutes after applying Control Power before you operate any other UPS controls.
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