Ring Main Unit Pdf

The extension transforms the rmu tobecome a 4 way or a 5 way respectively.

Ring main unit pdf. The primary switching devices can be either switch disconnectors or fused switch disconnectors or circuit breakers. A ring main unit rmu is a totally sealed gas insulated compact switchgear unit. It is available in 18 different configurations suitable for most switching applications within the range from 6 to 40 5 kv. Ring main unit long experience 1983.

Marketing launch of the fi rst rm6 compact with integrated insulation. Creation of the network point integrating the rm6 and telecontrol. Ring main unit is a compact sealed and enclosed type of switchgear. Creation of the circuit breaker version with integrated protection unit needing no auxiliary power supply.

It s complete switchgear in itself. Medium voltage mv sf6 insulated ring main unit for secondary distribution up to 40 5 kv 630a safering is a ring main unit rmu for the secondary distribution network. The below figure shows the rmu with 3 incomers and 1 outgoing feeder to distribution transformer. Different combinations of these primary switching devices within the unit are commonly used.

Contents 1 introduction 4 introduction to sfa rm 4 a sfa rm solution 4 b quality management 4 c quality checks and tests 4 d environmental precision 5 2 sfa rm in network 6 3 application. Read more ring main unit rmu introduction. These are utilized for medium voltage power distribution. The ring main unit is an innovative solution that makes it easier to manage the numerous challenges of electrical distribution.

Rmu of different voltage mostly 12 kv and 24 kv and current ratings are. A complete switchgear means assembly of required switching devices protection device as well as metering device. You see complete switchgear simply means assembly of needed switching devices. 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.

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. Means a 3 way or 4 way unitised ring main switchgear unit that is capable of been extended by one switchgear function. It also includes a protection device and a metering device. It is a complete switchgear in itself.

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. 11kv ring main unit with 3 lbs and 1 cb. The extended unit has a separatetank from the main unit.