The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers.
Rmu ring main unit single line diagram.
Ring switch mechanism are equipped with safety interlocks to protect the user equipment from any unintentional operation.
Ring main unit rmu is a compact enclosed and sealed type of switchgear used for medium voltage power distribution.
Ring main units are available in different voltage ratings ranging from 11kv to 33kv.
The major advantage of ring main units is the safety they provide to the operators.
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.
Read more ring main unit rmu introduction.
Advantages of ring main units.
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.
Front view and single line diagram figure 2.
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.
Rmu of different voltage mostly 12 kv and 24 kv and current ratings are.
The ring main unit is an innovative solution that makes it easier to manage the numerous challenges of electrical distribution.
It is a complete switchgear in itself.
17 5 kv 2 ring switches up to 630 a 1 vacuum circuit breaker up to 630a.
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.
17 5 kv 2 ring switches up to 630a 1 vacuum circuit breaker up to 630a.
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.
A complete switchgear means assembly of required switching devices protection device as well as metering device.
Single line mimic diagram with clear indication of switch position on off or earth position.
A ring main unit rmu is a totally sealed gas insulated compact switchgear unit.
Fully interlocked with cable box for earth and test facility.
Different combinations of these primary switching devices within the unit are commonly used.
Operations counter indicator.
B by a fuse switch combination up to 2000 kva b by a circuit breaker with protection unit up to 8000 kva.
The switchgear and busbars are enclosed in a gas tight chamber fi lled with sf6.
