Operation; Figure 4-2. Synchronization Reference Control - Eaton Powerware 9390 Installation And Operation Manual

UPS System−A
Bypass Voltage
NOTE The Synchronization Reference Control relays are shown under normal conditions. Both bypass sources are available and are
in synchronization.
NOTE Dashed switch position of Synchronization Reference Control Relay 1 shows UPS System−A in the non−master system mode.
NOTE Dashed switch position of Synchronization Reference Control Relay 2 shows UPS System−B in the non−master system mode.
NOTE At any given time, only one of the UPS systems can be in the non−master system mode.
4.3

Operation

EATON Powerware
UPS System−B
Output Voltage
(Load B)
Relay 1
UPS System−A Synchronization
Reference Voltage

Figure 4-2. Synchronization Reference Control

Perform the following procedure to set up the Powerware Sync Control for operation
with your system. See Figure 4-3 and Table 4-1 for the location and explanation of
the controls and indicators on the Powerware Sync Control.
1. Place both UPS systems in normal operating mode. Refer to the applicable
Powerware 9390 or Powerware 9395 UPS Installation and Operation Manual
listed in paragraph 1.3 on page 1−4.
2. Press the Lamp Test pushbutton to verify all indicators illuminate and are
working correctly.
3. Determine which system load bus (A or B) will be used as the master
synchronization source. Set the Preferred Source Selector switch to this load
bus.
NOTE If either of the yellow Synchronized To Load indicators are illuminated, the Preferred Source Selector
switch is locked out and the master synchronization source cannot be changed.
®
9390 and 9395 Sync Control Installation and Operation Manual
POWERWARE SYNC CONTROL OPERATING INSTRUCTIONS
UPS System−B
Bypass Voltage
Synchronization
Reference Control Relays
Powerware Sync Control
UPS System−B Synchronization
S
164201571 Rev E www.powerware.com
UPS System−A
Output Voltage
(Load A)
Relay 2
Reference Voltage
4−3