Description

Abb ring main unit – sf6 insulated ring main units RMU ABB MV Products

ABB SF6 Insulated RMU – SF6 INSULATED RING MAIN UNITS AND COMPACT SWITCHGEAR – SAFERING AND SAFEPLUS FOR SAFE AND RELIABLE POWER DISTRIBUTION

SF6 Insulated Ring Main Units And Compact Switchgear – Safering And Safeplus

ABB offers a complete solution for 12/24 kV distribution networks. This consists of SafeRing, a Ring Main Unit (RMU) that can be supplied in various configurations and SafePlus, a compact switchgear with unique flexibility. SafePlus offers extendibility and fully / semi modular configuration possibilities. Both the units have identical user interfaces. SafeRing / SafePlus are delivered as a completely sealed system with a stainless steel tank containingall the live parts and the switching equipment. Constant atmospheric conditions in the sealed tank ensures a high level of reliability, safety and a virtually maintenance-free system. As an option in SafePlus, an external busbar can be provided to enable a completely modular configuration. SafeRing and SafePlus can also be fitted with a remote control and monitoring unit and are suitable for both indoor and outdoor applications.

ABB SF6 Insulated RMU Key Features

• Compact and robust design
• Minimal moving parts
• Virtually maintenance free
• High degree of functionality with integrated features
• High flexibility
• Multiple configuration options
• Enhanced safety
• Complete solutions including applications
• for remote control and monitoring

Standard Equipment Supplied With Safering / Safeplus

• Earthling switches
• Operating mechanism with integral mechanical
• Interlocking
• Operating handle
• Facilities for padlocks on all switching equipment
• Bushing for cable connections in front with arc resistant
• cable covers for utmost operator safety
• Manometer for SF6 gas pressure monitoring
• Lifting lug for easy handling
• All units are designed so that an integrated remote
• control and monitoring unit can be fitted when required

Applications

• City Power Distribution
• Small Industries,
• Hotels, Shopping Centers, Office Buildings, Business Centers, Etc.
• Compact Secondary
• Light Mining  Applications, Tunnels And Underground Railways
• Wind Turbines

Safeplus And Safering

Voltage And Short Circuit Indicators

As an option these units can be equipped with fixed type or plug-in type voltage indicators as well as electronic short circuit indicators for simple fault indication.

Circuit breaker with relay

When vacuum circuit breakers are used for transformer protection, self-powered microprocessor based over Current and earth fault relay are used. The protection system does not require an external power supply, as the power is taken from the current transformers.

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