30kW Distribution Box Specifications
A 30 kW distribution box typically operates at 120/208 VAC, 3-phase, with multiple output connectors and circuit protection, designed for indoor or outdoor use.
Electrical Specifications
- Input Voltage: 120/208 VAC, 3-phase, 60 Hz (some models accept 380V ±15%, 50 Hz for international versions)
- Input Connector: Often a 100-amp, 4-pole, 5-wire connector (MIL-C-229922 or IEC 60309 Pin & Sleeve)
- Output Voltage: 120/208 VAC 3-phase and 120 VAC single-phase
- Output Connectors:
- Two 60-amp, 4-pole, 5-wire connectors for high-power loads
- Multiple 20-amp NEMA L5-20R or 5-20R receptacles for smaller loads
- Some models include specialized IEC 60309 outlets for industrial equipment
Circuit Protection
- Circuit Breakers: Thermal-magnetic or hydraulic-magnetic type, with 3-phase breakers being common trip, molded-case, and single toggle operation
- Overcurrent Protection: Each output is protected individually; main input breaker protects the entire unit
- Advanced Features: Some units allow adjustable trip curves, current limits, load shedding, and phase balancing via digital control panels
Physical and Mechanical Features
- Enclosure: Powder-coated aluminum or steel, NEMA 3R rated for indoor/outdoor use, weatherproof covers for receptacles
- Dimensions: Typically under 42”L x 48”W x 32”H; weight under 350 lbs
- Portability: Handles for lifting by multiple persons; elevated base to keep receptacles above ground
- Stackability: Many models are designed to be stackable for modular deployment
Operational Features
- Control: Manual start/stop via on-site buttons or external control signals; some units support automatic or remote operation
- Monitoring: Digital displays for voltage, current, frequency, and power; warnings and faults annunciated via text and flashing backlight
- Compatibility: Can accept power from larger PDUs, generators, or synchronized external sources
Summary
A 30 kW distribution box is a versatile power distribution solution for industrial and commercial applications, providing robust overcurrent protection, multiple output options, and safe operation in indoor or outdoor environments. Models vary in input voltage, control features, and monitoring capabilities, but all are designed to handle high-power loads efficiently and safely.
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