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JXM Metering Distribution Box
The JXM type distribution box is suitable for three-phase AC 50Hz, rated voltage 220V/380V, and rated current below 250A in three-phase four-wire power systems
Key words:
People's Power
Transformer
Substation
Power equipment
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Product Description
Overview
The JXM type distribution box is suitable for three-phase AC 50Hz, rated voltage 220V/380V, and rated current below 250A in three-phase four-wire power systems, as well as for indoor lighting and power distribution circuits with a current of 200A and below. It is used for receiving and distributing electrical energy, overload protection, short circuit protection, and line switching.
The product features good safety, flexible electrical schemes, convenient combination, strong series and practicality, novel structure, and high protection level.
Material Description
The box body is formed by stainless steel argon arc welding. Depending on the installation method, it can be selected as embedded or suspended, fully considering the diversity of power supply user needs.
The box type has characteristics of a sturdy and compact structure, high reliability, and ease of maintenance and use.
Usage Environmental Conditions
· Altitude: 2000m
· Maximum ambient temperature: +45℃
· Minimum ambient temperature: -40℃
· Average temperature of the hottest month: 34℃
· Maximum annual average temperature: 25℃
· Earthquake resistance capability:
Horizontal ground acceleration: 2m/s²
Vertical ground acceleration: 1m/s²
Sine resonance three-cycle wave, safety factor above 1.67
· Maximum design wind speed: 31.5m/s (maintained at a height of 10 meters above ground for 10 minutes)
· Monthly average maximum relative humidity: 90% (25℃)
· Solar radiation intensity: 0.1W/cm²
· Ice thickness: 0~30mm
· Pollution level: Level III
· Thunderstorm days: 50 days
· Inclination: not exceeding 3° for the box body
· Installation location: outdoor
Equipment Technical Parameters
| Project Name | Unit | Related Standards |
| Rated Working Voltage | V | 0.22kV, 0.4kV |
| Power Supply Waveform | Total harmonic distortion rate of voltage sine waveform ≤5% | |
| System Insulation Voltage | kV | Main circuit: 0.4kV, 2.5kV |
| Rated Working Frequency | HZ | 50Hz±5% |
| Rated Working Current of Horizontal Busbar | A | 630A |
| Segment Capacity | KA | 6KA |
| Rated Current | A | 10A~400A |
| Shell Protection Level | IP | 3X |
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