Accunergi NPS / NPT Series Single & Three Phase Rectifier and Battery Charger
The Accunergi NPS and NPT Series Rectifier and Battery Charger systems are engineered for high-reliability industrial standby power applications, supporting both single-phase (NPS) and three-phase (NPT) power inputs. Backed by more than five years of expertise in standby power electronics, these systems are purpose-built for environments where continuous and stable DC power is essential.
The system operates by converting the AC supply through a transformer and power converter, delivering a filtered and regulated DC output to both the connected load and the standby battery. A dedicated main control circuit manages isolated triggering while continuously sensing rectifier voltage and current to ensure stable, controlled output under varying load conditions.
Technical Specifications
Input Characteristics
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Single-Phase (NPS): 110V / 220V / 240V (±10%)
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Three-Phase (NPT): 380V / 400V / 415V (±10%)
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Frequency: 50Hz / 60Hz (±5%)
Output Characteristics
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Nominal DC Voltages: 12V, 24V, 48V, 110V, 220V
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Output Stability: Static regulation within ±2% for 10–100% load variation
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Charging Mode: Constant voltage / constant current (I/U) in accordance with DIN 41773
Protection & Reliability Features
To ensure safe and dependable operation in industrial environments, the NPS and NPT Series include multiple protection mechanisms:
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Soft-Start Function: 4-second walk-in to limit inrush current
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Surge Suppression for input power disturbances
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Short-Circuit Protection: Current limiting at 110% of rated output current
Industrial Applications
The NPS and NPT Series are designed for demanding infrastructure and heavy-duty industrial environments, including:
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Energy & Utilities: Power stations, substations, transmission & distribution systems, dams
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Infrastructure: Airports, MRT, railway and LRT systems, water treatment plants
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Critical Facilities: Hospitals, data processing centers, defense installations
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Heavy Industry: Petrochemical facilities (onshore and offshore), turbine control systems
Mechanical & Environmental Specifications
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Enclosure: Epoxy powder-coated, RAL 7032 Light Grey
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Ingress Protection: IP20
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Operating Temperature: −10 °C to +40 °C (derating up to +55 °C)
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Physical Configuration:
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Wall-mount cabinets from A14 (460 × 400 × 270 mm)
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Floor-standing cubicles up to B63 (2080 × 900 × 800 mm)
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Customisable Options
Accunergi offers a wide range of configuration options to meet specific site and operational requirements:
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12-pulse rectifier configuration
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Digital metering
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DC earth fault alarm
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Battery temperature compensation
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Remote communication via RS232 / RS485
