Unipower Three Phase SCR Charger, 125 VDC
Unipower's ARR-M Series three-phase SCR chargers deliver reliable 125 VDC power with minimal maintenance requirements. Engineered specifically for utility and industrial standby applications, these high-power units combine operational simplicity with durable construction for long-term, cost-effective performance.
Input current:
208 VAC (15.6), 240 VAC (13.5), 480 VAC (6.8)
Heat loss:
1484 Btu, 0.44 KW
Cabinet Size: 39" H x 24" W x 20" D
Standard Control Modules
All three-phase ARR-M chargers, regardless of output voltage &
current utilize the same control. This feature allows for minimum
parts inventory and simplifies maintenance.
Regulation
DC float voltage is maintained within ±0.5 percent from no load to
full load with input frequency variations of ±5 percent and with AC
input voltage variation of +10%/-12% of the nominal input voltage.
During operation the maximum output transient does not exceed
6% of the initial steady-state voltage for sudden load changes
between 10% and 90% of rated output. Recovery takes less than 300
milliseconds.
Current Limiting
The current limiting circuit is factory set at 100 percent and is
adjustable from 20 percent up to 100 percent of rated output.
It will hold down to short circuit.
Power Factor
The typical power factor is 0.88 when tested on a resistive load and
batteries.
Electrical Noise – Filtered Output
Nominal ripple when connected to a battery rated four times the
charger output current rating:
• 125V Models – 100mV (30mV available with extra filtering)
Features & Benefits
• Microprocessor Controlled
• Digital Metering
• Simultaneous Voltage & Current Readings
• Listed to UL/CSA
• CE safety and EMC standards tested and compliant **
• Designed to NEMA PE5 standard insures reliable
performance under real world conditions
• Low Maintenance
• Common control board for all output voltages and
current ratings reduce spares requirements and
simplifies maintenance.
• Remote Communications - MODBUS & DNP3
• User definable control and alarm set points
• Temperature Compensation
• High efficiency & power factor
• Design provides for reliable power requirements
on or off the battery