Powerware 5075 kVA operation manual Using the Emergency Power OFF Pushbutton

Using the EMERGENCY POWER OFF Pushbutton

Emergency Power Off is initiated by the covered, red EMERGENCY POWER OFF pushbutton on the Monitor Panel. This pushbutton is protected by a clear plastic shield to prevent accidental activation. In an emergency, you can press this pushbutton to instantaneously open the input breaker and interrupt UPS output. The UPS is cut off from utility power, and your critical load is de-energized. All power to the critical load is lost. The UPS (including Bypass) remains locked off until you reset the EMERGENCY POWER OFF pushbutton.

WARNING:

All power to the critical load is lost when you press this pushbutton. You should use this feature only in an emergency or when you want to de-energize the critical load.

To restart the UPS after pressing the EMERGENCY POWER OFF pushbutton, follow the procedure “Resetting UPS System after Emergency Power Off” of this chapter before starting the UPS.

NOTE: The Remote EMERGENCY POWER OFF option functions the same way as the EMERGENCY POWER OFF pushbutton on the Monitor Panel.

To Use the EMERGENCY POWER OFF Pushbutton

1.Raise the clear plastic shield covering the red EMERGENCY POWER OFF pushbutton on the Monitor Panel.

2.Press the EMERGENCY POWER OFF pushbutton.

The breakers open (you can hear them opening). The breaker CB1 trips, and the Emergency Power Off PUSH TO RESET pushbutton on the UPS Control Panel pops out. The UPS system shuts down.

Resetting UPS System after Emergency Power Off

CAUTION:

Do not attempt to restart the system until the cause of the emergency has been identified and cleared.

The Emergency Power Off PUSH TO RESET pushbutton is a small white button on the UPS Control Panel. The PUSH TO RESET pushbutton pops out and the CB1 switch trips when the EMERGENCY POWER OFF pushbutton on the Monitor Panel is activated.

To reset the UPS system:

1.Press the Emergency Power Off PUSH TO RESET pushbutton until it clicks in and remains recessed.

2.Move the CB1 switch from the TRIPPED (center) position to OFF. The switch should be difficult to move from the TRIPPED position.

3.The UPS system is now reset. To restart the UPS system, follow the procedure at the beginning of this chapter.

70 Powerware BPIII Harsh Environment UPS 50--75 kV Installation and Operation

164291261 Rev. F 111503