Products and services

Battery chargers, inverters and UPS

Battery Chargers

MA - Master-slave SCR battery charger and rectifier

The MA series is used in master-slave redundant chargers. Each system is composed of two (2) battery chargers. The master charger usually powers the load. If the master charger fails, then the load is automatically transferred to the slave charger.

 The MA series battery chargers have been designed to provide the most reliable power source to the batteries and loads to which they are connected. Thyristor technology is used, in which the conduction angle is controlled.

The microprocessor display module measures (voltmeters, ammeters), monitors (comprehensive alarm system) and recharges the battery. The battery charger can be used with all types of battery.

Input voltage

120, 208, 220, 240, 277, 480 or 600 V AC, single-phase/three-phase, 60 Hz ± 6% (50 Hz optional).

Output voltage 

24, 48, 110, 125, 220 or 250 V DC, other output voltages are available on request.

Output current

10, 20, 30, 40, 50, 60, 80, 100, ..., 600 A (50 to 100% adjustment range).

Voltage regulation

± 0.25% for a 0 to 100% load fluctuation of the rated output current, combined with an input voltage fluctuation of ± 10%, combined with a frequency fluctuation of ± 5%. No batteries are connected to the system when measurements are taken.

Residual ripple

2% RMS of the output voltage for the same conditions specified in “Voltage regulation”.


90%, at full charge.


input: thermal magnetic circuit breaker; output: thermal magnetic circuit breaker (2 poles)


natural convection except for the battery section, which may be provided with a fan (system with vented battery in the same cabinet as the battery charger).

Acoustical noise

less than 65 dbA at one meter, at nominal power.

Climatic conditions

operating temperature: -10°C to 50°C

storage temperature: -20°C to 70°C

relative humidity: 0 to 95% at 25°C