FLN36-24D SF6 Load Break Switch-Indoor Solution for Safe 24kV Distribution

FLN36-24D is an indoor high-voltage SF6 load switch, mainly used for load control and protection in 24kV power systems. It integrates load switching, isolation, and grounding functions in a sealed SF6-filled enclosure.

1. Basic Information

• Type: Indoor high-voltage SF6 load switch

• Arc-extinguishing & Insulating Medium: SF6 gas

• Positions: Closing / Opening / Grounding

• Compliance Standards: GB3804, GB16926, IEC60265, IEC60420

2. Technical Specifications

3. Product Features

• Multifunctional Integration: Load switch, isolating switch, and grounding switch in one SF6-sealed epoxy enclosure.

• High Reliability: Natural interlocking to prevent misoperation; safety diaphragm with backward pressure relief.

• Maintenance-Free Design: SF6 insulation allows 20 years of stable operation under normal conditions.

• Flexible Operation Modes: Supports manual and electric operation; optional shunt trip, overcurrent release, auxiliary switch, and pressure gauge.

4. Application Scenarios

Suitable for 50/60Hz, 24kV indoor AC power systems, including:

• Industrial and mining enterprises

• High-rise buildings

• Residential communities

• Prefabricated substations

• Cable branch boxes

• Ring main units

Used for switching load current, controlling and protecting lines and distribution transformers.

5. Frequently Asked Questions (FAQ)

Q1: What is the service life of the SF6 gas? How to know when refilling is needed?
A: SF6 gas lasts about 20 years under normal conditions. The device has a gas leakage detection interface; refill is needed if pressure drops below the threshold.

Q2: Can the FLN36-24D be used outdoors?
A: No. It is designed for indoor installation only. For outdoor applications, choose our FLW series with IP54+ protection.

Q3: Is professional training required for operation?
A: Basic electrical operation training is recommended. Follow the operation manual and interlocking sequence to ensure safety.

Q4: What optional accessories are available?
A: Shunt trip coil, overcurrent release, auxiliary switch, and pressure gauge to enhance monitoring and remote control.

Q5: How does FLN36-24D differ from a circuit breaker?
A: Load switches cannot interrupt short-circuit currents; circuit breakers can. FLN36-24D is used for load switching, isolation, and grounding.

Q6: What after-sales support is provided?
A: 12-month warranty after installation (or 18 months from shipment). Technical support, spare parts, and on-site commissioning for large projects are available.

Q7: What routine maintenance is recommended?
A: Annual inspections, gas checks, and visual inspections for mechanical wear, contact condition, and enclosure integrity.

Q8: Can this unit be integrated into RMU or compact substations?
A: Yes. It is suitable for ring main units and prefabricated substations requiring reliable indoor 24kV switching.

Q9: What are common failure modes and how are they detected?
A: Gas leaks, contact wear, and mechanical faults. Early detection via pressure monitoring, inspection, and routine testing.

Q10: Are spare parts available?
A: Yes. Spare and wear parts (contacts, springs, seals) are available. Provide model and serial number when ordering.