Online Operations; Manual Bypass Operation - Ablerex KRONOS Installation And Operation Manual

3.2 Online Operations

The Kronos online UPS provides stable power that is not affected by an unstable main power
supply (eg. grid power). Through the Kronos online UPS, the power provided is a clean, noise-
free power source.
The online architecture offers three types of power supply methods depending on the power
environment.
 Normal Mode
When grid power is normal, once Rectifier has been turned on at the main power supply then
the battery is charged in DC/DC mode while the required power is supplied via Inverter at
the same time.
 Bypass Mode
In the event of UPS overload, Inverter failure or module overheating, the power supply
circuit switches from Inverter to the bypass output.
 Battery Mode
When the UPS detects a failure in the main power supply then power is provided from the
battery instead. The touch screen at the front of the module will also display current battery
level to remind the user.

3.3 Manual Bypass Operation

When the manual bypass breaker is activated, the load is powered directly from the bypass input.
This operation is useful when maintenance needs to be carried out on UPS allowing the
technician to perfomer the complete service without having to disconnect the power to the load.
Attention:
 UPS maintenance can only be performed by authorized and qualified technicians who are
familiar with this UPS.
 If the UPS is in battery mode, closing or changing the position of the manual bypass
breaker will cut off power to the load.
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