Multivoltage battery chargers MVC

INPUT

Standard voltage

380 +/-15% 3 phases 50/60 Hz

Efficiency at full load

>90 %

Power factor

>0.92

OUTPUT

Voltage

2, 4, 6, 8, 10, 12, 24, 36, 48, 72, 80, 96 Vdc Selectable by knob.

Current

50, 100, 200, 300, 400, 600 Amps Adjustable by potentiometer.

Regulation

Static: <1% for simultaneous variations of input voltage (+/-15%) and load (100%) Dynamic: +/-2% for 10%-100% and 100%-10% load variation, settling time <100 msec

Output ripple

< 1% Standard at low frequency < 1% Standard at switching frequency Additional filtering for zero ripple requirements are available.

PROTECTION

Battery polarity reversal

If the battery is connected with reverse polarity, the MVC remains in stand-by mode and the output fuse doesn't burn.

Output short circuit

The MVC can work continuously at constant current with the outputs in short circuit. If a short circuit occurs during full power operation, the current spike is limited to no more than 125% of the maximum rated current of the unit, then the MVC will recover the control of the current to the programmed value.

Overtemperature

A thermal sensor protects the electronic components of the MVC. Optional probe for battery overtemperature protection.

Sparks on battery connection

If the battery is connected while the MVC is off, no sparks and/or flames will be generated at the connectors.

Self-test at startup

Every time the MVC is powered, an automatic self-test of the power electronics and the control boards is performed in less than 10 seconds. In case of fault, the power supply remains in stand-by mode. Optional relais for remote fault signaling.

MECHANICAL

External dimensions

Box A: 500 x 380 x 700(h) mm output power less than 3 kW Box B: 500 x 440 x 900(h) mm output power between 3 kW and 16 kW Box M: 630 x 500 x 1050(h) mm output power between 16 kW and 36 kW Box K: 800 x 600 x 1800(h) mm custom projects

Enclosure

2 mm steel. Hinged front access door. Optional wheels kit for easy moving.

Cooling

Forced ventilation Optional electronic control for the forced ventilation: for applications where the charger remains continuously in service at a small fraction of the rated power (e.g.: stand-by batteries), the forced ventilation is switched on only when it's necessary.

Output metering

Standard: analog voltmeter and ammeter Optional: digital voltmeter and ammeter, with programmable minimum and maximum alarms

Output control configurations

A) Fixed output voltage and current limit (both adjustable by internal potentiometers) B) Adjustable output voltage and current limit by external potentiometers C) Up to 12 output voltages, selectable by external knob and adjustable current limit by external potentiometer (Standard Version MVC) D) Interface for remote control of output voltage and current (0-10 V analog signal)

Timers

A) No timer B) Mechanical timer 0-24 hours C) Digital timer 0-99 hours

LEDs on front panel

Stand-by/Auto-test (yellow) In service (green) Thermal protection (red) Reverse polarity protection (red) Low output voltage (only with digital voltmeter) High output voltage (only with digital voltmeter) Low output current (only with digital ammeter) High output current (only with digital ammeter)

Available options

Audible alarms Remote voltage sensing terminals Remote shutdown terminals Distribution panel Instruments for AC input metering Ground fault alarms Digital board for programmable charge curve (version CBC) Digital board for Ampère-hour (Ah) metering Special cabinets with separate compartments for batteries Separate outputs for battery and loads, with contactors for low voltage load disconnect