Summary

Low voltage cable distribution box is the supporting equipment of urban network cable transformation. According to the shell material, it mainly includes stainless steel, SMC and cold-rolled steel plate. It can be installed in outdoor, indoor or underground places, playing the role of tapping, branching, relay or conversion, providing greater convenience for cable network.

Normal service conditions

The installation height shall not exceed 2500m above sea level.

Ambient medium temperature not higher than + 40 ℃ and not lower than - 20 ℃.

The average relative humidity of the air is not more than 90%, and the general condensation that may happen accidentally due to temperature change is considered.

The inclination of vertical installation shall not exceed 5.

No obvious violent vibration, impact and bumpy place.

There is no place with explosion danger, and the gas and conductive dust in the medium are harmful enough to corrode and destroy the insulation.

Where there is no rain.

Main technical parameters

Rated working voltage: 400V rated insulation voltage: 690V

Rated impulse withstand voltage: 6kV

Rated bus operating current: 160-630a

Rated branch working current: 10-400a

Rated frequency: 50 Hz

Rated short circuit current: 50kA

Peak short circuit current: 105kA