Shield T3 60 – 500KVA User Manual
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5
Maintenance
This chapter introduces UPS maintenance, including the maintenance instructions of
power unit, monitor unit and bypass unit and the replacement method of dust filter.
5.1
Precautions
Only maintaining engineers can maintain the power unit, monitor unit and bypass unit.
1)
The power unit should be disassembled from top to bottom, so as to prevent any
inclination from high gravity center of the cabinet.
2)
To ensure the safety before maintaining power unit and monitor unit, use a
multimeter to measure the voltage between operating parts and the earth to
ensure the voltage is lower than hazardous voltage, i.e. DC voltage is lower than
36Vdc, and AC maximum voltage is lower than 30Vac.
3)
Monitor unit and bypass unit is not recommended to hot swap; only when UPS is in
Maintenance Bypass Mode or UPS is completely powered off, the monitor unit and
bypass unit can be disassembled.
4)
Wait 10 minutes before opening the cover of the power unit after pulling out from
the Cabinet.
5.2
Instruction for Maintaining Power unit
Confirm the UPS is operating in Normal Mode and the bypass is working normally
before pulling out the power unit needed to be repaired.
1)
Ensure the remaining power module will not be overloaded.
2)
Power off the power unit:
a)
Enable. LCD panel
->
Menu Operate
->
Enable Module “OFF”
icon
.
b)
Press the “OFF” button on t
he power unit panel for 3 seconds, the
power unit quits from the system.
3)
Remove the mounting screw on the two front sides of the power unit and pull out
the power unit by two persons.
4)
Wait 10
minutes
before opening the cover for repairing.
5)
After the repairing is done, push the power unit into the cabinet and the power
unit will automatically join the system.
5.3
Instruction for Maintaining monitor unit and bypass unit
5.3.1
Maintaining monitor unit and bypass unit for 60kVA-120kVA
Confirm the UPS is operating in Normal mode and the bypass is working normally
1)
Transfer the system to bypass mode through the LCD control panel (Refer to
chapter 4.2.2).
2)
Turn on the maintenance bypass breaker. The load is powered through
maintenance bypass and static bypass.
3)
One by one to turn off the battery breaker, input breaker, bypass input breaker
and output breaker. The load is powered through maintenance bypass.
4)
Take out two power units, which are close to the monitoring unit and the bypass
unit, can be taken to repair the monitoring and the bypass unit.
5)
After the completion of maintenance, insert power unit and tighten the screws on
both sides of the power unit.
6)
One by one to turn on the output breaker, bypass input breaker, input breaker and
battery breaker.
