RING MAIN UNIT

RMU (Ring Main Unit) cabinet or medium voltage cabinet is integrated electrical equipment to connect, measure, and integrate fixed type breaker with transformer protection function.

RMU cabinets are small in size, highly reliable, safe, easy to maintain, easy to replace, and expand. Depending on requirements, the RMU is available in different voltages suitable for both indoor and outdoor installations.

The RMU cabinet is connected by output and input cable compartments by isolating breakers and cables out to transformers using load breakers and protective fuses.

In general, the switch element placed in an SF6 gas tank made of a substance that is particularly resistant to the environment, such as dirt, oil grease, not rust.

RMU cabinets are divided and connected by separate compartments, with RMU standards with two compartments, four compartments, six compartments, depending on customer requirements with functions of them.

The essential functions of the switchgear are:

Circuit control: It controls the circuit to switch functions.

Isolation: It isolates the faulty equipment from the rest of the circuit

Protection: It protects the circuit from ground-fault current, short-circuits current fault, and overload.