UPS for 208 Vac Grid, Installation Guide, doc. rel. 3.0
90
Table 9: Normal mode operating position of the circuit breakers
Battery box input
(on battery box)
Rectifier ac input
(CB 2)
Bypass ac input
(CB 3)
UPS AC output
(CB 5)
Maintenance bypass
(CB 6)
ON
ON
ON
ON
OFF
To put the system in maintenance bypass mode:
1.
Verify with a multi-meter on CB6 that there is no voltage difference between the input
and output of each phase.
If there is, there is a bad phase rotation either on the input of the system or on the
maintenance bypass CBs 4 and/or 6. This will have to be corrected before the
system can be put in maintenance bypass. DO NOT CLOSE CB 4 OR 6, THIS WILL
CAUSE A SHORT BETWEEN PHASES.
2.
From the System Menu go to
Status
.
The Status screen appears:
Figure 72: UPS On - Normal Mode
3.
Verify that all three phases of the bypass input voltages are present and the inverter
and bypass are synchronized on the System Controller Status screen.
If they are not, the UPS cannot transfer to bypass mode.
Summary of Contents for B60US-IB
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