Rmu Ring Main Unit Single Line Diagram

Rmu is an all in one solution and is safe easy to install and maintenance free switchgear helping the utilities improve reliability uptime of the network and reduce the operational costs.

Rmu ring main unit single line diagram.

The switchgear and busbars are enclosed in a gas tight chamber fi lled with sf6. Ring main unit rmu is a compact enclosed and sealed type of switchgear used for medium voltage power distribution. Rmu of different voltage mostly 12 kv and 24 kv and current ratings are. Front view and single line diagram figure 2.

B by a fuse switch combination up to 2000 kva b by a circuit breaker with protection unit up to 8000 kva. Sbs 3 way compact indoor type rmu sbs 3 way compact outdoor type rmu figure 1. Operations counter indicator. Advantages of ring main units.

The major advantage of ring main units is the safety they provide to the operators. Read more ring main unit rmu introduction. Single line mimic diagram with clear indication of switch position on off or earth position. Fully interlocked with cable box for earth and test facility.

The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers. Ring switch mechanism are equipped with safety interlocks to protect the user equipment from any unintentional operation. Ring main units our range of ring main units rmus are all suitable for both indoor and outdoor locations and are designed to operate in the most extreme environmental conditions. The ring main unit is an innovative solution that makes it easier to manage the numerous challenges of electrical distribution.

These units allow the connection of transformers through under ground cables and also provide protection to the transformers. 17 5 kv 2 ring switches up to 630 a 1 vacuum circuit breaker up to 630a. A complete switchgear means assembly of required switching devices protection device as well as metering device. Different combinations of these primary switching devices within the unit are commonly used.

It is a complete switchgear in itself. Front view and single line diagram efi 21ka 17 5 kv 400a ct. A ring main unit rmu is a totally sealed gas insulated compact switchgear unit. The rm6 is a compact unit combining all mv functional units to enable connection supply and protection of transformers on an open ring or radial network.

Technical specification of motorised rmu page 2 of 28 technical specification for 22 and 11 kv ring main unit switchgear table of contents 1 0 scope 2 0 general 3 0 standards 4 0 the standards mentioned above are available from 5 0 climate conditions 6 0 rmu outdoor metal clad 7 0 take off terminal units for future automation.