10kV 630A Medium Voltage RMU SF6 Load Break Switch – FLN36-12 Indoor LBS
The FLN36-12D/FLRN36-12D is a high-performance SF6 gas-insulated load break switch designed for medium voltage switchgear. Using SF6 gas for superior arc extinguishing and insulation, it provides three reliable working positions: Open, Closed, and Earth.
Key Highlights:
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Versatile Operation: Available in K-type single spring (FLN36) or A-type double spring (FLRN36) mechanisms for different protection needs.
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Compact & Durable: Optimized for space-saving installations in Ring Main Units (RMU), cable distribution boxes, and switching substations.
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Safety First: The FLRN36-12D model supports fuse combinations to provide enhanced control and circuit protection.
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Environmentally Adaptive: Designed for stable performance in diverse environmental conditions with easy installation.
Product Description
The FLN36-12 series is a high-performance Medium Voltage RMU SF6 Load Break Switch designed for incoming lines in electrical distribution systems. Utilizing SF6 gas as the arc-extinguishing and insulating medium, this indoor switch ensures reliable performance within a compact design. It features a three-position rotary movable contact structure, supporting Closing, Opening, and Earthing states with integrated interlock safety.
Features
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Dual Operating Mechanisms: Available as the FLN36-12D (K-type single spring) or FLRN 36-12D (A-type double spring). The A-type model can be equipped with fuse combinations for enhanced circuit protection.
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Superior Insulation: The main circuit is sealed in a rugged epoxy resin housing, ensuring the conductive functions remain unaffected by external environmental influences.
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High Safety Standards: Features an internal structural “weak point” in the housing to safely release overpressure in the event of internal arcing, protecting the cabinet and personnel.
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Maintenance-Free Design: Compact, lightweight, and engineered for long-term operational safety without regular maintenance requirements.
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Wide Application: Specifically optimized for Ring Main Units (RMU), cable distribution boxes, and switching substations.
Specifications
| Item | Unit | FLN36-12D Data |
| Rated Voltage | kV | 12 |
| Rated Current | A | 630 |
| Rated Frequency | Hz | 50 |
| Lightning Impulse Withstand Voltage | kV | 75 |
| Rated Short-time Withstand Current (3s) | kA | 20 |
| Rated Peak Withstand Current | kA | 50 |
| Mechanical Endurance (LBS) | Time | 5000 |
| SF6 Gas Pressure (20°C) | bar | 0.4 |
| Main Circuit Resistance | μΩ | ≤ 65 |
Applications
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Infrastructure: Power supply and switching substations.
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Secondary Distribution: Ring Main Units (RMU) and cable distribution boxes.
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Industrial Use: Protecting and controlling medium voltage electrical equipment.
Selection details for 10kV 630A Medium Voltage RMU SF6 Load Break Switch
To confirm the required SF6 load break switch configuration for your project, include:
- Rated voltage/current and load break switch or switch-fuse configuration
- Operating mechanism, earthing function, interlocking and control requirements
- Gas compartment/cabinet layout, installation dimensions and quantity
Drawings and quotation requirements
Send the model reference, application, quantity and destination country together with the relevant drawing or existing equipment information. Confirm the selected configuration against a model-specific drawing and ratings sheet before ordering; request the applicable test documentation for your project requirements.
Request model confirmation and a technical quotation · Compare related SF6 Load Break Switch / 12kV SF6 Load Break Switch.
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