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The loads will be continued to be supplied directly from the mains.
7.5. Manual (Maintenance) Bypass Decommissioning Instructions
In order to transfer the loads from Manual Bypass to UPS without interruption, do the following
instruction respectively;
Switch the input circuit breaker (F1) to “I” position.
If exists, switch Bypass circuit breaker (F4) to “I” position.
Switch the inrush circuit breaker (F6) to “I” position.
LCD will be ON. Go to Measurements menu and wait till DC busbar voltages be min. 372VDC.
Switch the battery circuit breakers (F5) –the breakers on external battery cabinets if any-.
Switch the output circuit breaker (F2) to “I” position.
See “Bypass” written on LCD.
Wait 2 minutes till the UPS completes the test.
Switch the Manual Bypass circuit breaker (F3) to “0” position.
See “NORMAL” written on LCD.
Close the front cover of UPS.
Some parts inside the UPS (terminals, EMC filters and measurement circuits) are still
energized during maintenance bypass operation. In order to deenergize all UPS parts, circuit
breakers on mains and bypass mains distribution panels feeding the UPS and circuit breakers
on external battery cabinet shall be brought to “OFF” position. Internal batteries shall also be
isolated from the system.
During Manual Bypass operation; in case of any mains interruption occurs, all loads on the
output will be deenergized. Manual Bypass Operation should not be preferred for long time
use.
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