66 Shield T3 60 – 500KVA User Manual
bypass breaker, so need to used external circuit breakers). The maintenance
bypass supplies power to loads.
o
Note
150kVA - 300kVA 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.
150kVA -300kVA 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 fromMaintenance Bypass
Mode
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.
o
Note
150KVA - 300KVA operation, please refer to chapter 5.3.2.
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
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
.
