Powerware 5075 kVA - Manual (Page 72)

64 Powerware BPIII Harsh Environment UPS 50--75 kV Installation and Operation
164291261 Rev. F 111503
Using the Operating Controls
Although the operating controls appear easy to use, you should read these
instructions and thoroughly understand how the controls work before attempting
to use them. Refer to oneline drawing 164201261---3 in Appendix A to clarify control
functions. Refer to Chapter 9 --- Using the Monitor Panel for instructions on using
the monitor panel.
CAUTION:
Incorrect use of the power controls can cause a loss of power to your
critical load.
The following paragraphs describe the switches on the Control Panel (see Figure 34).:
• The MODE switch is a two-position rotary switch that controls the manual
transfer of the UPS to and from Bypass mode. The MODE switch is used to:
--- Place the critical load in Bypass mode when the UPS is operating in Normal
mode and the bypass source is within acceptable limits. If the transfer does
not occur within 2 seconds, an alarm sounds.
--- Prevent transfer to Normal mode when the UPS is in Bypass mode.
--- Shut down the
power processing unit (inverter and rectifier) of the UPS.
OFF
MODE
BATTERY
PUSH
TO RESET
NORMAL
BYPASS
NORMAL
START
Figure 34. UPS Control Panel
• The BATTERY switch is a two-position rotary switch that allows you to manually
enable or disable the Battery Breaker CB2. The battery switch is also used to
reset the DC to DC converter if the converter shuts down during normal
operation.
• The PUSH TO RESET pushbutton is described in the “Resetting UPS System
after Emergency Power Off” section of this chapter.