Parameters of all models of low-voltage distribution boxes

Low-voltage distribution boxes vary by model, rated voltage, current, breaking capacity, and structural design, with common series including GGD, GDH, PGL, GCK, GCS, and MNS. Core Specifications1.

Rated Voltage and Frequency

Most low-voltage distribution boxes operate at 380V AC for industrial three-phase systems, with some models supporting 660V AC for higher-power applications. Auxiliary circuits typically cover 220V AC/DC. Standard operating frequency is 50Hz, though some motor control-oriented models use 60Hz.

2.

Rated Current

Small distribution boxes: 400ALarge power distribution systems: up to 4000AExample: GCK series vertical bus systems range from 400–800A, selected based on total load. 3.

Rated Breaking Capacity and Short-

Time Withstand Current

Rated breaking capacity indicates the ability to interrupt short-circuit currents quickly: PGL1 type: 15kAPGL2 type: 30kAShort-time withstand current measures instantaneous fault tolerance: GCK series horizontal bus: 80kA for 1 second. 4.

Environmental Conditions

Operating temperature: -5℃ to +40℃Maximum humidity: 50% at 40℃Some enclosures allow short-term exposure to +70℃ and high humidity up to 90% at lower temperatures.

Model Series Overview

Fixed SwitchgearGGD series: High breaking capacity, stable, used in substations and power plants.

GD

H series: Similar to GGD, with manufacturer-specific parameters.

PG

L series: Stable power supply for industrial and commercial applications. Withdrawable SwitchgearGCK series: Modular, includes power distribution and motor control centers, suitable for motor and lighting control.

GC

S series: Rated voltage up to 400V, used in high-consumption systems like power plants and high-rise buildings.

MN

S series: Compact, versatile, widely used in industrial, mining, and building applications.

Structural and Functional Features

Enclosures: Made of cold-rolled steel, stainless steel, or corrosion-resistant materials; IP54 protection or higher for industrial environments. Internal Components: Circuit breakers, contactors, relays, busbars, and protective devices for overload, short-circuit, and leakage protection. Mounting Options: Wall-mounted or floor-mounted with front access for maintenance and expansion.

Advanced Features: Remote monitoring, intelligent modules, and modular design for flexible power distribution and fault detection. SummaryLow-voltage distribution boxes are designed to provide safe, reliable, and flexible power distribution. Selection depends on rated voltage, current, breaking capacity, environmental conditions, and application type.

Fixed and withdrawable switchgear models offer different levels of modularity and protection, while advanced MNS and GCK series provide versatility for industrial and commercial installations.