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Home > Medium Voltage Components > SF₆ Load Break Switches > FLN48 Series Indoor SF₆ Load Break Switch

FLN48 Series Indoor SF₆ Load Break Switch

FLN48 indoor SF₆ load break switches are designed for load switching, isolation and earthing in 12 kV secondary distribution systems. Two-position and three-position configurations are available for different switching needs, while FLRN48 switch-fuse combinations provide coordinated switching and protection for transformer and feeder applications.

Key Ratings

  • Rated Voltage

    12 kV

  • Rated Current

    630 A

  • Rated Short-Circuit Breaking Current

    20 kA

  • Switching Configuration

    Two-Position / Three-Position

  • Applicable Standard

    IEC 62271-103

Available Configurations

  • Two-Position Configuration

    Two-Position Configuration

    Close and open positions for load-switching applications in medium-voltage distribution systems.

  • Three-Position Configuration

    Three-Position Configuration

    Close, open and earth positions integrate load switching, isolation and earthing functions for medium-voltage distribution applications.

  • Switch-Fuse Combination

    Switch-Fuse Combination

    FLRN48 switch-fuse combinations provide coordinated switching and fuse protection for transformer and feeder applications.

Operating Options

  • 01

    Manual Operation

    Manual spring-operated mechanism for local operation and standard switchgear applications.
  • 02

    Motorized Operation

    Motorized operating mechanism for remote operation and automation, with applicable control and auxiliary options.

Technical Specifications

Parameter Specification
Rated Voltage 12 kV
Rated Frequency 50 / 60 Hz
Rated Current 630 A
Rated Short-Time Withstand Current 20 kA
Rated Short-Circuit Making Current 50 kA
Power-Frequency Withstand Voltage 28 kV
Lightning Impulse Withstand Voltage 75 kV
Switching Positions Two-Position / Three-Position
Operation Manual / Motorized
Mechanical Endurance Product-Specific
Applicable Standard IEC 62271-103

Standards, Testing & Documentation

IEC-Oriented Design

IEC-Oriented Design

Designed with reference to IEC 62271-103 and applicable project requirements. Switch-fuse combinations are designed with reference to IEC 62271-105 where applicable.

Factory Routine Testing

Factory Routine Testing

Electrical, mechanical and operating checks are carried out before shipment according to product configuration.

Project Documentation

Project Documentation

Technical datasheets, outline drawings, wiring diagrams and test records can be provided for project review.

Download Product Catalogue

Discuss Your SF₆ Load Break Switch Requirements

Share your system voltage, rated current, switching configuration, switch-fuse requirements and switchgear requirements with our engineering team.

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Manufactured by Toonice Electric Power Technology Co., Ltd.

Exported by Wenzhou Naisite Electric Co., Ltd.

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