Indoor SF6 Gas Insulated Load Break Switch – 12kV / 24kV / 40.5kV 630A LBS for RMU

Product Description

The FLN36 series is an indoor, medium-voltage SF6 Gas Insulated Load Break Switch designed for reliable performance in compact switchgear and Ring Main Units (RMU). Utilizing SF6 gas for superior arc extinguishing and insulation, this series ensures safe and efficient closing and breaking of load and overload currents. Its compact size, lightweight design, and high environmental adaptability make it an ideal solution for urban and rural power networks, cable distribution boxes, and transformer substations.

Key Features

• Three-Position Operation: Features a rotary movable contact structure with three distinct operating states: Closing, Opening, and Earthing.

• Integrated Safety: Includes a secure mechanical interlock between positions and an internal pressure-relief “weak point” in the housing to protect personnel in the event of internal arcing.

• Superior Insulation: The main circuit is sealed within a robust epoxy resin housing, protecting all conductive functions from external environmental influences like dust, salt fog, and humidity.

• Dual Operating Mechanisms:

  • FLN36-D (K-type): Single spring operating mechanism for standard switching.

  • FLRN36-D (A-type): Double spring mechanism that can be equipped with fuse combinations for enhanced circuit protection.

• Maintenance-Free: Engineered for long-term operational reliability with a mechanical life of up to 5,000 operations.

• International Standards: Fully satisfies standards including IEC94, GB3804, and GB16926.

Applications

• Secondary Distribution: Optimized for Ring Main Units (RMU) and cable branch cabinets.

• Infrastructure: Used in power supply substations as a protecting and control device.

• Industrial & Commercial: Ideal for indoor medium-voltage switchgear in various urban and rural environments.

Normal Working Environment

• Altitude: ≤ 1000m (Standard) to ≤ 2000m.

• Ambient Temperature: -30°C / -40°C to +40°C.

• Relative Humidity: Daily average ≤ 95%, Monthly average ≤ 90%.

• Earthquake Intensity: ≤ 8 degrees.

• Condition Requirements: The environment must be free from recurrent severe vibration and significantly contaminated corrosive or flammable gases.