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5.2 Procedure for Switching between Operation Modes
5.2.1 Switching the UPS into Battery Mode from Normal Mode
The UPS transfers to Battery model immediately after input circuit breaker
disconnects from the utility.
5.2.2 Switching the UPS into Bypass Mode from Normal Mode
Follow the path by selecting the icon of “
ON
” to transfer the system to Bypass Mode.
Warning
Ensure the bypass is working normally before transferring to bypass mode. Or it may cause
failure.
5.2.3 Switching the UPS into Normal Mode from Bypass Mode
Follow the path by selecting the icon of “
Off
”, the system transfer to Normal Mode
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.
5.2.4 Switching the UPS into Maintenance Bypass Mode from Normal Mode
These following procedures can transfer the load from the UPS inverter output to the
maintenance bypass supply, which is used for maintaining the UPS.
1. Transfer the UPS into Bypass mode following section 5.2.2.
2. Open the battery breaker and close the maintenance bypass breaker. And the load
is powered through maintenance bypass and static bypass.
3. The load is powered through maintenance bypass.
Summary of Contents for EA990 G5 10
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