O Perating Modes; Normal Mode; Battery Mode; Bypass Mode - Gamatronic CENTRIC 50 kW User Manual

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

Normal mode.

•

Battery mode.

•

Bypass mode.

3.1 Normal mode
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.
3.2 Battery mode
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.
3.3 Bypass mode
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.
CENTRIC User Guide, rel. 3.4
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AMATRONIC LECTRONIC
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