Common Specifications of Power Distribution Boxes

Power distribution boxes vary widely in voltage, current capacity, type, and application, ranging from low-voltage fixed switchgear to portable units rated up to 800 Amps.Types and Applications1. Low-Voltage Fixed Switchgear:GGD series: Used in substations and power plants, AC 50Hz, rated voltage 380V, high breaking capacity, stable performance, novel structure .GDH and PGL series: Similar low-voltage fixed switchgear for stable power supply in industrial and commercial settings . 2. Low-Voltage Withdrawable Switchgear:GCK series: Composed of power distribution and motor control cabinets, AC 60Hz, working voltage ~660V, suitable for motor control and lighting .GCS series: AC 50Hz, rated voltage 400V, used in power plants, high-rise buildings, and heavy-load environments .MNS series: Compact, stable, widely used in small power plants, industrial enterprises, and hotels . 3. Portable Power Distribution Boxes:Load Master™ Series: Adjustable outputs, 1–4 circuit breakers, 20–800 Amps, compact and rugged design, cULus certified, suitable for indoor/outdoor events, industrial, military, and entertainment applications .Outdoor PowerRACK™ Slim Combo: Features multiple 50A and L21-20 twist-lock receptacles, adjustable breakers 60A–150A, designed for temporary or dynamic power distribution .Electrical SpecificationsVoltage Input/Output: Typically 10–30 VDC for small units, up to 660V for industrial switchgear .Maximum Current Load: Ranges from 10 Amps for compact units to 800 Amps for portable industrial boxes .Wire Compatibility: Input wires 10–12 AWG, output wires 10–28 AWG depending on regulated or unregulated outputs .Frequency: AC 50Hz or 60Hz depending on series and application .Physical and Environmental SpecificationsDimensions: Small units ~25.3 cm x 15.1 cm x 11.4 cm, larger industrial cabinets vary by series .Weight: 1.36–1.6 kg for compact units, heavier for industrial or portable racks .Operating Temperature: -40°C to 50°C for small units, industrial units designed for standard environmental conditions .Construction: Designed for harsh environments, moisture-resistant, pluggable installation for decentralized systems .Standards and ComplianceIEC 61439: Compliance for low-voltage switchgear and controlgear assemblies .IEC 61535: Installation connector systems for decentralized distribution .UL 1640: Certification for portable power distribution units .SummaryPower distribution boxes are engineered to meet diverse needs, from compact, low-voltage units for instrumentation to robust, portable units for industrial and entertainment applications. Key considerations include voltage and current ratings, environmental tolerance, modularity, and compliance with international safety standards. Choosing the right box depends on the application, load requirements, and installation environment.