Shield T3 60 – 500KVA User Manual
65
seconds and the system transfers to bypass mode. This needs to enable the switch
behind the front door. As shown in
Figure4-2 Enable the switch
Warning
Ensure the bypass is working normally before transferring to bypass mode. Or it may
cause failure.
4.2.3
Switching
the UPS into Normal Mode from Bypass Mode
Two ways to transfer the UPS into Normal mode from Bypass Mode:
(a) Enter the menu Operate, touch the icon transfer to inverter
and the system
transfers to bypass mode.
(b) Press and hold the
INV
key on the operator control panel for longer than two
seconds and the system transfers to Normal mode.
o
Note
Normally, the system will transfer to the Normal mode automatically. This function is
used when the frequency of the bypass is over track and when the system needs to
transfer to Normal mode by manual.
4.2.4
Switching
the UPS from Normal Mode into Maintenance
BypassMode
These following procedures can transfer the load from the UPS inverter output to the
maintenance bypass supply, which is used for maintaining.
1)
Transfer the UPS into Bypass mode following section 5.2.2.
2)
The inverter indicator LED goes out, status indicator LED goes out, the buzzer
alarm, the inverter shutdown. The bypass supplies power to loads.
3)
Turn off the external battery breaker and turn on the maintenance bypass breaker.
And the load is powered through maintenance bypass and static bypass.
4)
One by one to turn off the input breaker (Q1), bypass input breaker (Q2), output
breaker (Q4), and then the system shutdown (150kVA - 300kVA only have a manual
A
Enable the switch
Zoom in A area
