Earth Solar High Current Ring Main Unit

What is ring main unit?

Ring Main Unit comprises of one incomer feeder and one or more outgoing feeder. The incomer feeder is either Vacuum Circuit Breaker or SF6 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.

What is ring main unit distribution?

The power is distributed through these RMUs for the end consumers. Ring Main Unit distribution is costly compared to other distribution networks, so this type of distribution can find in urban cities where supply reliability is major issue. Ring main units are available in different voltage ratings ranging from 11KV to 33KV.

What are the different types of ring main units?

Indoor as well as outdoor types of Ring Main Units are available. Ring Main Unit comprises of one incomer feeder and one or more outgoing feeder. The incomer feeder is either Vacuum Circuit Breaker or SF6 Circuit Breaker with associated Disconnect Switch and Earth Switch.

What are oil insulated ring main units?

The oil insulated ring main units are commonly seen in mining and oil field applications. Gas insulated ring main units use SF6 S F 6 gas as the insulating medium and are used in low to medium voltage distribution networks to provide uninterrupted power supply and protect the electrical equipment.

Why should you choose a smart ring main unit?

Working with IEDs allows remote operation. SCADA implementation is easy with smart Ring main units. The space occupied by RMUs is less as they are Gas Insulated Switchgear. The time taken for installation and commissioning of RMUs is very less. RMUs require less maintenance.

What is redundant supply in ring main distribution system?

Every consumer has redundant supply in Ring main distribution system. The figure shows the circuit diagram of ring main network used for distribution (Secondary) of power to houses and small industries. supplies, via two incoming circuit breakers and a Normally Open bus-section in the primary Substation.