MGE UPS Systems EPS 7000 - Manual (Page 43)

Operation page 2 —15
Users Manual
2.9.2 Start-up
The following start-up procedure should be performed during the initial start-up following installation of the system, and
this sequence should be followed any time that the EPS 7000 system is being restarted from an off condition (i.e., after
the UPS has been powered down by removing the upstream AC input power and opening all the circuit breakers of
the UPS).
a. Apply power to Q4S by closing the upstream circuit breaker supplying Q4S, and the upstream circuit
breaker supplying the optional maintenance bypass input (if present).
b. Apply power to the UPS modules by closing the upstream circuit breaker supplying the main AC input
(mains 1).
c. Start the SSC:
1. Close the optional system maintenance bypass circuit breaker Q3BP (if present, in the maintenance bypass
cabinet). Power is now available at the SSC output (the load is energized) via the maintenance bypass source.
2. Close the upstream circuit breaker Q4S that supplies the bypass input to the SSC. The SSC will come on-line;
after about ten (10) seconds, the wrap-around circuit breaker Q2S will automatically close.
3. Close the optional system isolation circuit breaker Q5N (if present, in the maintenance bypass cabinet).
4. Open the optional system maintenance bypass circuit breaker Q3BP (if present). The SSC is now on-line and
the load is supplied via the bypass source.
Note that if your SSC configuration does not include the maintenance bypass option, start-up requires only
closing Q4S to supply the bypass source to the SSC. All other functions are fully automatic.
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.
IMPORTANT: 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.