UPS 30-300kVA User Manual
Operations
61
Note
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150kVA and 200kVA only have a manual bypass breaker. In manual bypass mode (The
manual bypass supplies power to loads), dangerous voltages are present on terminal and
internal Copper bar.
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150kVA and 200kVA need to use external circuit breakers (Includes external input breaker,
external bypass input breaker, external output breaker and external maintenance bypass
breaker).
Warning
Before making this operation, read messages on LCD display to be sure that bypass supply is
regular and the inverter is synchronous with it, so as not to risk a short interruption in powering
the load.
Danger
If you need to maintain the power unit, wait for 10 minutes to let the DC bus capacitor fully
discharge before removing the cover.
4.2.5
Switching the UPS into Normal Mode from Maintenance BypassMode
These following procedures can transfer the load from the Maintenance Bypass to inverter output.
1)
One by one to turn on the output breaker (Q4), input breaker (Q1), bypass input breaker (Q2),
and then the system starts initializing.
2)
After 30S, the static bypass turns on, the bypass indicator LED goes green, and the load is
powered through maintenance bypass and static bypass.
3)
Turn on the external battery breaker.
4)
Turn off the maintenance bypass breaker and the load is powered through static bypass.
5)
After 30S, the rectifier starts, the rectifier indicator LED goes green, and then inverter starts.
6)
After 60S, the system transfers to Normal mode.
Note
150KVA and 200KVA operation, please refer to chapter 6.2.4.
4.3 Battery Manual
If the battery is not in use for a long time, it is necessary to test the condition of the battery. Two
methods are provided:
1)
Manual Discharging test. Enter the menu Operate
，
as is shown in Figure.5-4 and touch the
icon “Battery maintenance”
，
the system transfers into the Battery mode for
discharging. The system will stop discharging when the battery will have 20% of capacity or
in low voltage. Users can stop the discharging by touching the “Stop Test” icon
.
