Description

Abb ring main unit – safelink cb RMU ABB MV Products

ABB Safelink RMU , Ring Main Unit (RMU) is a compact, sealed for life metal-enclosed switchgear widely used in Urban Power Distribution Network. . Some of the key features of the RMU includes SF6 gas insulation, compact and modular construction, integral protection system, fully extendable options, and low maintenance.

• SF gas insulated switchgear with extremely compact and robust

Design

• 12 kV, 630 A, 21 kA for 3 sec; metal enclosed design with IP54

Degree of protection, suitable for outdoor conditions

• Internal arc classified and fully extensible with option of adding

Standalone vacuum circuit breakers or ring switches.

• type tested according to latest IEC standards
• Robotically welded stainless steel tank
• Vacuum circuit breaker with high mechanical endurance of 5000 Operations
• Maintenance-free and complete safety for user and pedestrian with no

Exposure to live parts

• All in-built mandatory safety interlocks provided to ensure

Operator safety

• Manufactured according to ISO 9001 – 14001 and OHSAS 18001
• Complete solutions including applications for remote control and monitoring
• Recyclable and very low environmental impact

INFORMATION

Ring Main Unit, RMU is a compact, enclosed and sealed type of Switchgear used for medium voltage power distribution. It is a complete Switchgear in itself. A complete Switchgear means, assembly of required switching devices, protection device as well as metering device. RMU of different voltage (mostly 12 kV and 24 kV) and current ratings are available.  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. This incomer feeder is given with the provision of bushing protruding from the enclosure of RMU for supply cable connection.

Outgoing feeder comprises of Load Break Switches with associated Disconnect Switch and Earth Switch. Provision for cable connection is provided in outgoing feeder. The Load Break Switch is nothing but an isolator having the capability of breaking the circuit during on load condition.

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