Cable distribution box Ring Main Unit

The cable branching box is an intermediate component for the connection between cables and cables, as well as between cables and other electrical equipment in the distribution line.

Its connection and combination mode is simple, convenient and flexible, and it has the properties of full insulation, full enclosure, corrosion resistance, maintenance-free,safety and reliability, etc.

It is widely used in commercial centers, industrial parks, urban residential communities and a large number of urban power grid renovation projects.

The main functions of the cable branching box are to tap or transfer cables, mainly playing the roles of cable tapping and cable transferring.

Our company can produce various types of cable branching boxes with a voltage of 40.5 kV and below.

On a relatively long line, using multiple small-section cables often leads to a waste of cable usage. Therefore, large cables are often used for sending power to the electricity load center.

The large cables are divided into several small-section cables through the cable branching box, and the small-section cables are sent to the load points.

This wiring method is widely used in the power supply of residential communities and small users in urban power grids.

Enforce standards

Classification of protection classes for GB 4208 enclosures equipment standards

Common technical requirements for GB/T 11022 high voltage switchgear and control

DL/T593 Common specifications for HV switchgear enquiries and orders

Type description

Normal service condition

Maximum temperature:+45℃

Average temperature of the hottest month:+30℃

Annual average temperature: +20℃

Minimum air temperature: -25℃

Maximum daily temperature difference: 30K

Sunshine intensity:0.1W/c㎡

Altitude: ≤1000m

Ambient relative humidity (at 25℃)

a) Daily average value: 95%

b) Monthly average value: 90%

Seismic intensity: Grade VlI:

a) Ground horizontal acceleration is lower than: 3.0m/s2

b)Ground vertical acceleration is lower than: 1.5m/s2

Ice coating thickness:≤10mm

Installation location: Outdoor

Pollution class:Grade E