Eaton POWERWARE 9315 - Manual (Page 72)

UPS OPERATING INSTRUCTIONS
EATON Powerware ® 9315 UPS (500–750 kVA) Installation and Operation Manual S 164201691 Rev 1 www.powerware.com 9-2
9.1.1 Control Panel
The UPS control panel contains an LCD screen to display the current UPS system
status. You can view a statistical history and log of system events and display a
real-time graphic representation of power flowing through the system components.
Backlit status indicators show the UPS operating mode and alert you to system
events.
The control panel is described in Chapter 8, “Using the Control Panel.” The Battery
switch controls the application of battery power to the UPS. The Mode key switch,
also located on this panel, is used to start and stop the system and transfer the load
between normal UPS operation and bypass operation. The Emergency UPM Off
pushbutton is located at the top of the control panel, and the Push In To Reset button
for the Emergency UPM Off is located between the Battery switch and the Mode key
switch.
9.1.2 UPS Circuit Breakers
The UPS can contain as many as four circuit breakers:
S UPS Input Breaker (CB1)
S UPS Output Breaker (CB3)
S UPS Bypass Breaker (CB4)
S Backfeed Protection Breaker (FBP)
CB1 controls the input to the UPS rectifier, while CB3 controls the output of the UPS
inverter. CB1 is optional and may be either motor operated or manually controlled.
CB4 and FBP are used in single module applications and are contained in the MBC of
the UPS. CB4 is used as the bypass supply in the event the output of the UPS is not
available and to supply the critical load during maintenance. The FBP is used to
prevent power feedback to the UPS input supply when the UPS is operating in the
Battery mode. These breakers are electrically controlled by the UPS and are automatic
in operation.
Multi-module systems replace the MBC of the UPS with an SBM. Refer to “SBM
Circuit Breakers” in the Powerware 9315 Parallel Capacity/Redundant UPS Installation
and Operation Manual.
In addition, a remote mounted external battery disconnect is used to connect the
battery string to the UPS. This disconnect is manually controlled.
9.1.3 Emergency UPM Off
An Emergency UPM Off pushbutton is provided for situations where you must
instantaneously control the UPS output. The pushbutton is located on the front of the
UPS for quick access and is covered with a clear plastic shield to prevent accidental
activation. The shield must be raised before pressing the pushbutton. The Emergency
UPM Off pushbutton is described in Chapter 9, “UPS Operating Instructions.”