Operating Modes; Normal Operation; Battery Operation; Bypass Operation - Gamatronic Centric 50 kVA User Manual

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2.
PERATING MODES
The Centric UPS functions to supply ac electrical power to your load.
The Centric has three possible modes of operation:
•

Normal operation.

•

Battery operation.

•

Bypass operation.

2.1 Normal operation
The UPS is almost always in normal operation mode. The load receives its power from the
inverters that supply stabilized voltage, protected from spikes and irregularities in the ac input.
The ac input system feeds the charger which supplies dc power to the inverter, while concurrently
charging the batteries.
2.2 Battery operation
During battery operation, the load continues to receive power from the inverters, but the dc input
to the inverter is taken from the batteries, instead of from the rectifier.
The batteries are galvanically connected by dc link to the inverter and the charger. Therefore, the
dc voltage to the inverter continues without interruption when the ac input supply drops out; there
is no need for any switching devices to bring the battery on-line, as it is permanently on-line.
The duration of the battery operation is determined by the load demand and the battery capacity.
2.3 Bypass operation
During bypass operation, the load receives power directly from the bypass ac input via the static
switch.
Whenever the inverters cannot provide power to the load, either due to an overload or a short-
circuit in the load, the load is automatically moved to the bypass ac input. The load automatically
returns to the inverter when the problem has been corrected.
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Gamatronic Electronic Industries Ltd.
CENTRIC User Guide, Release 0.3