Product Profile of Switchgear Ring Main Unit

Crompton greaves, a part of the avantha group, and a conglomerate with the global footprint offers trident ring main unit - oil. It is certified with iso 9001: 2000. There are various types of ring main units like:

• Non- extensible ring main unit comprises of ring switch & switch fuse unit.

• Extensible ring main unit comprises of ring switch

• Extensible switch fuse unit comprises of switch fuse unit

• Extensible single ring switch

• Double extensible ring switch.


The salient features trident ring main unit is:

• Compact design: the trident range is designed to provide a compact arrangement but still offer ease of installation.

• Ease of operation: all switching and earthing operations can be carried out from the front of the unit. Position indicators are clear and conveniently located in line with the switching positions.

• Interlocks: the switches are fully interlocked to prevent any possible mal-operation and subsequent dangerous operations.

• Mechanism: the operating mechanisms are of the independent manual spring type for both main and earth switches ensuring speed of operation is independent of operator.

• Ring/feeder: ring switches are fault make, load break three position type `on`, `off` and `earth`.