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d. Start the UPS modules:
1. For each module, close the input isolation circuit breaker Q1. Verify that
the following conditions exist:
• The red “load not protected” LED is on
• The rectifier/battery charger automatically starts
If either condition is not present, there is a fault. Open Q1 and
contact MGE Customer Support Services.
2. For each module, close the UPS isolation circuit breaker Q5N. The fans in
the UPS module will start.
3. For each module, close the battery disconnect circuit breaker QF1.
The batteries are now connected to the rectifier/battery charger, and
have begun charging.
4. If the modules are not programmed for automatic restart, for each module,
press the “inverter on” pushbutton. The green “load protected” LED will
flash for about 3 seconds, indicating that the inverter is starting.
5. As soon as a sufficient number of UPS modules have been started, the
SSC will automatically transfer the load to the UPS module output. On
each module, the green “load protected” LED will turn on and remain on.
On the SSC, the green “load protected” LED will turn on.
6. As the remaining UPS modules are turned on (per step 4 above), their
respective green “load protected” LEDs flash for three seconds, then
remain on as the modules connect to the load. The load is equally shared
between modules.
After initial start-up of the system, normal operation should
be tested. At the minimum, the following tests should be
performed (as applicable to your installation):
• Emergency power off (EPO) test from each UPS module, and from the SSC.
2.4.3 Checks After
Start-up
If the transfer conditions are not satisfied (bypass
AC input sources is out of tolerance, or some other
reason), a forced transfer is required. Refer to
Section 2.4.6, Forced Transfers.
NOTE
Because it is standard for the UPS module to be
programmed for automatic restart, the inverter will
automatically start after the battery disconnect
circuit breaker QF1 has been closed.
IMPORTANT
2 — 31Operation
User’s guide