MaxPower Corp Gamatronic Power+ SA - Manual (Page 14)

User Guide Gamatronic Electronic Industries Ltd.
2.1 Major Subsystems
The device consists of the following modules:
2.1.1 Charger
P OWER + SA includes a 3-phase charger with PFC 1
.
2.1.2 Batteries
The P OWER + SA battery bank is used as a backup in the event that the utility AC
input fails. The batteries are housed in an external cabinet next to the P OWER + SA
cabinet. Batteries are charged by the rectifier/charger, which supplies both the
inverter and the battery charger.
2.1.3 Inverter
A 3-phase PWM inverter is connected to batteries by a classic DC link.
2.1.4 Static Switch (ST/ SW / BYPASS)
The Static Switch enables an automatic transfer of the load from the output of the
inverters to an alternate source whenever the inverter can no longer supply power to
the load. The static switch transfers current at high speed.
8 +
1
PFC is a feature included that reduces the amount of generated reactive power. Reactive
power operates at right angles to true power and energizes the magnetic field. Reactive
power has no real value for an electronic device, but electric companies charge for both true
and reactive power resulting in unnecessary charges.
In power factor correction, the power factor (represented as "k") is the ratio of true power
(kWatts) divided by reactive power (kVA). The power factor value is between 0.0 and 1.00. If
the power factor is above 0.8, the device is using power efficiently. A standard power supply
has a power factor of 0.70-0.75, and a power supply with PFC has a power factor of 0.95-
0.99.
POWER SA User Guide (UL), Release 1.7