SCHNEIDER BMEH584040C Ring main unit

Description

SCHNEIDER BMEH584040C Ring main unit

Schneider Electric is a global leader in Ring Main Units (RMU), primarily through its highly acclaimed RM6 (Gas Insulated) and Premset (Solid Shielded Insulated) ranges. An RMU is an all-in-one, factory-assembled switchgear unit used at the load connection points of a ring-type distribution network.

Product Detailed Description

A Schneider RMU typically integrates all medium-voltage (MV) functions in a single enclosure:

• Switch-disconnector units: For connecting and isolating the ring cables.

• Circuit breaker or Fuse-switch units: For protecting the downstream transformer.

The RM6 is the most widely used model, featuring a stainless steel tank filled with $SF_6$ gas for insulation and switching. For eco-conscious projects, Schneider also offers the RM6 AirSeT, which uses pure air instead of $SF_6$ gas.

Typical Technical Parameters (RM6 Series)

Key Product Advantages

• Compact Footprint: Combines multiple functional units (2, 3, or 4 ways) in a very small volume, saving valuable real estate in urban environments.

• Total Protection against Environment: The “Sealed for Life” stainless steel tank protects live parts from dust, humidity, and pollution, ensuring a service life of up to 30 years.

• Safety First: Features internal arc withstand capabilities and mechanical interlocks to prevent incorrect operations by technicians.

• Smart-Ready: Most Schneider RMUs are equipped with Easergy relays and sensors, allowing for remote monitoring, fault location, and automated grid healing.

• Maintenance Free: The gas-insulated design eliminates the need for periodic cleaning or adjustment of internal contacts.

Important Considerations & Precautions

• Gas Pressure Monitoring: For $SF_6$ models, always check the manometer (pressure gauge) before operation. If the needle is in the red zone, do not operate the unit.

• Interlock Compliance: Never force a handle if it is blocked. Ensure all conditions (e.g., earthing switch open) are met before switching.

• Cable Termination: High-quality “dead-break” elbow connectors must be used. Improper cable preparation is the leading cause of failure in RMUs.

• End-of-Life Disposal: Because $SF_6$ is a potent greenhouse gas, the unit must be decommissioned by certified professionals to recover the gas at the end of its life.

Product Applications

• Secondary Distribution: Connecting residential neighborhoods and commercial complexes to the main utility grid.

• Renewable Energy: Used in the base of wind turbines or within solar farm kiosks to protect and isolate the network.

• Infrastructure: Providing reliable power to airports, hospitals, metro stations, and data centers.

• Mining & Heavy Industry: Compact power distribution in harsh, space-constrained environments.

Shipping Port: Xiamen, China

Payment: Bank of Chicago, Bank of Singapore

Express cooperation: fedex, DHL, UPS and your express account

Service: Professional Sales provides 24 hours /7 days online service

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