Fire Protection (A48)

Fire Protection (A48)

Magnetic Amplifier Technology

12 or 24 VDC
20 Amps

Single Phase 120, 208, or 240 VAC

Fire Pump


The A48/A48B is a completely automatic, solid state, constant voltage Battery Charger built to carry continuous and intermittent loads up to 80% of its maximum rated output capacity. It automatically senses the battery and load conditions and delivers the necessary amount of charge. The A48/A48B Battery Chargers are equipped with a built-in charge divider circuit to isolate and charge two separate sets of batteries of the same nominal DC Voltage either independently or simultaneously. The operation is completely automatic-a voltage sensing relay is provided to automatically transfer the output of the Battery Charger to the high rate charge mode, after engine cranking or following a power failure. This will bring the batteries to a fully charged state within 24 hours. Once the batteries are fully charged, the relay will automatically transfer the charge rate back to the Float rate to prevent overcharging and protect the batteries.

• Automatic AC Input Voltage Compensation ±10%
• Automatic Surge Suppression
• AC Input and DC Output Fusing Protects Battery and Charger
• Automatic Float/High Rate Mode Switching

• Float/High Rate Lights (A48 model only)

• Charger Failure Alarm Relay with (1) form “C” Contact

• Automatic DC Voltage Regulation

• DC Current Limiting Circuitry (typically less than 125%) Eliminates the Need for Cranking Disconnect Relay

• 5% Accuracy Analog DC Ammeter & DC Voltmeter (A48 model only)


User Manuals