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Explosion Proof Battery Charger designed for harsh environments


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Precision low voltage battery charger designed to operate in hazardous locations

Class I Division II Battery Charger

Precision low voltage battery charger designed to operate in hazardous locations


  • Class I Div II enclosure
  • High efficiency, high frequency operation
  • Seamless transition from voltage mode to current mode operation
  • Complete Fault Detection and Diagnostics
  • Full Bridge IGBT Output Stage
  • Factory Settable Output Voltage Wide Input Voltage Range – 400VAC – 550VAC

The APS BC-6964 Battery Charger is designed for hazardous location applications requiring Class I Div II equipment.

The BC-6964 accepts 3-phase 60 Hz AC input and generates 24 VDC 50A nominal output. The charger provides seamless transition from a voltage source to current limit operation for optimum battery charging. In voltage mode, the Charger regulates to a factory set DC voltage. While operating as a voltage source, the Charger regulates its output voltage to provide optimum charging of the battery. If the output current demand exceeds a maximum setpoint, the Charger seamlessly transitions from voltage source to current limit, where the Charger folds back the output voltage to limit the current to the maximum charge current (Alimit). As the battery load decreases to less than Alimit, the BC-6964 will seamlessly return to voltage mode operation.

The BC-6494 AC input voltage is EMI filtered and rectified to a high voltage of approximately 650 VDC, filtered and stored in a DC link capacitor bank. A high frequency IGBT full-bridge output inverter is pulse width modulated into the primary of a high frequency step down transformer. The transformer secondary is rectified, filtered and regulated to produce the precision Battery Charger output voltage.

Input power is provided by 3-phase AC input connections to an internal fuse block. Output charging power connections consist of two wire 24VDC connection terminals. Two 3/4" NPT conduit openings are provided to accommodate customer wiring.

Optional USB and RS485 communication ports are available to provide remote monitoring of the Battery Charger operation.

BC-6964 Diagram



Voltage Range / Nominal: 480VAC
Voltage Range / Operating range: 432 to 530VAC
Frequency: 60 Hz +/- 5%


Voltage: 24VDC Nominal (28.2V max)
Output Current Range : 0 to 50ADC
Output Voltage Ripple : < 1% F.S.
Efficiency: 90%


Operating Temp. Range: -40°C to 55°C
Storage Temp. Range: -40°C to +85°C
Humidity: 0 to 95%, Non-Condensing
Hazard: Class l Division ll


Dimensions, Inches: 18”W X 30”H X 8.25”D
Case Material: Copper free Aluminum
Natural Color: Gre

Protection Features

  • Safe shutdown in the event of input phase loss or under voltage conditions
  • Safe shutdown for internal over- temperature
  • Output current limiting
  • Output over-voltage, over-current and over-temperature protection
  • Input and Output Soft-Start Circuits

An optional internal display and discrete LEDs and are available to provide indication of the battery charger status of the following:


An optional communication port is available to provide remote monitoring of the Battery Charger operation.


Applied Power Systems
124 Charlotte Ave
Hicksville , NY 11801
United States

Applied Power Systems, Inc. is a power electronics company specializing in power conversion systems and thermal …
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