Ring Main Unit Rmu Circuit Diagram

A ring main unit rmu is a totally sealed gas insulated compact switchgear unit.

Ring main unit rmu circuit diagram. 17 5 kv 2 ring switches up to 630a 1 vacuum circuit breaker up to 630a. Front view and single line diagram efi 21ka 17 5 kv 400a ct. The below figure shows the rmu with 3 incomers and 1 outgoing feeder to distribution transformer. The incomer feeder is either vacuum circuit breaker or sf 6 circuit breaker with associated disconnect switch and earth switch.

This incomer feeder is given with the provision of bushing protruding from the enclosure of rmu for supply cable connection. The function of the ring main unit rmu is to connect the loop network and improve the reliability of the power supply such as the loop operation of the loop network or the load cut of the ring network. Ring main unit comprises of one incomer feeder and one or more outgoing feeder. A ring main unit rmu is a totally sealed gas insulated compact switchgear unit.

This is a new practical video which explains the practical components of the electrical panel rmu or ring main unit this is during its factory acceptance te. Front view and single line diagram figure 2. These are utilized for medium voltage power distribution. Ring main unit is a compact gas insulated switchgear cubicle equipped with sf6 switch disconnector and sf6 circuit breakers.

Ring main unit rmu is a compact sealed for life metal enclosed switchgear widely used in urban power distribution network. It s complete switchgear in itself. Different combinations of these primary switching devices within the unit are commonly used. Both oil and gas insulated ring main units are the result of extensive innovation using advanced technologies and are subjected to extensive testing and safety.

Sbs 3 way compact indoor type rmu sbs 3 way compact outdoor type rmu figure 1. What is ring main unit. What is ring main unit rmu. A very fantastic ring main unit rmu presentation by us.

Rmu ring main unit. A ring main unit includes a combination of one or more load break switch lbs cum earth switch as incomer and outgoing feeder and vacuum circuit breaker with associated disconnector and earth switch for load feeders. 17 5 kv 2 ring switches up to 630 a 1 vacuum circuit breaker up to 630a. It also includes a protection device and a metering device.

The ring main unit rmu is an electrical device applied to the power supply unit of the secondary distribution system. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers.