OPERATING INSTRUCTIONS
Eaton 9390 UPS, 9395 UPS, and 9395 SSBM Sync Control Installation and Operation Manual
S
P-164000052 Rev 2
www.eaton.com/powerquality
4-3
System-A Bypass
Voltage
System-B Output
Voltage (Load B)
System-B Bypass
Voltage
System-A Output
Voltage (Load A)
System-A
Synchronization
Reference Voltage
System-B
Synchronization
Reference Voltage
Eaton Sync Control
Synchronization
Reference Control Relays
Relay 1
Relay 2
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 System-A in the non-master system mode.
NOTE
Dashed switch position of Synchronization Reference Control Relay 2 shows 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.
Figure 4‐2. Synchronization Reference Control
4.3
Operation
Perform the following procedure to set up the Eaton 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 Eaton Sync Control.
1.
Place both UPS systems in normal operating mode. Refer to the applicable
Eaton 9390 UPS or Eaton 9395 UPS installation and operation manual listed
in paragraph 1.3.
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.