Operating Modes; Normal Operation; Battery Operation; Bypass Operation - Gamatronic Power+ User Manual

2. O
PERATING MODES
The POWER + UPS functions to supply AC electrical power to your load.
While using the POWER + , three modes of operation are possible:


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. The DC
inherently remains constant when the AC input supply drops out, without any switching devices.
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 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, transfer to the AC input is automatic. As soon as the problem is corrected, the
load is transferred back to the inverter.
2.4

Maintenance bypass (option)

Maintenance bypass is an optional feature. In maintenance bypass mode, the UPS output
terminals continue to supply power to the load, but the interior of the UPS is isolated from all
power flows. This enables a maintenance technician to safely work on the UPS without any
interruption of power to the load.
For more information on the maintenance bypass feature, see section 11.
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POWER + RM 50
VA, N.Am. Std. – User Guide, Release 1.4
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Gamatronic Electronic Industries Ltd.