Ring Main Unit (RMU)

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Ring main units are specialized medium voltage switchgear for supplying sustainable energy and protection for electrical equipment in secondary distribution networks up to 12kV 50Hz. They are suitable for both public and industrial distribution networks. Our ring main units feature simple structure, flexible operation and easy installation.Zhenwei provides customized ring main unit solutions to satisfy the various applications of customers. Simply provide us with your special requirements.

Parameters

Rated voltage: 12KV;
Rated current: 630A;
Rated frequency: 50HZ;
Rated short-time withstand current (2s): 20KV;
Rated peak withstand current: 63KV;
Rated transfer current: 2300A;
Ingress protection class: IP4X

Features

Maintenance-free
The inner metal enclosed tank is hermetically sealed. It means this ring main unit is independent of environmental effects such as dirt, small insects, moisture and so on.
Safety
It does not use SF6 gas as an insulation medium, avoiding the risk of explosion accidents caused by insufficient gas pressure leading to the decrease of insulation and arc quenching capability. All of its touchable parts have undergone insulation measures to avoid electric shock accidents.
High performance
It is equipped with a double break disconnector. It has an oversized gap, oversized creepage distance, and without any false fracture.
Easy to operate
Its operation is very simple. The operator only needs basic electrical knowledge, complex technical training is not necessary.
Transport and install conveniently
All our ring main units have a single cabinet and the same dimensions, so they are very convenient to transport and install.
Environment friendly
We care deeply about the environment. This product is made from non-toxic and harmless materials, and most of its part can be recycled after the end of its service life.