FLN36-12D SF6 Load Break Switch – Compact Indoor Solution for Safe 12kV Distribution

Product Size and Parameters

The FLN36 - 12 type sulfur hexafluoride load switch is a multifunctional medium-voltage switching device that integrates a load switch, a grounding switch, and an isolating switch. It is enclosed in a fully sealed epoxy resin shell with a reinforced structure and filled with SF6 gas at 0.045 MPA. With a small number of components, it realizes the above three functions, thus ensuring the quality and reliability of the product. It has excellent insulation and switching functions, and can ensure the safe operation of the equipment for 20 years under normal conditions.

The circuit and grounding circuit are switched on and off by a manual or electric operating mechanism independent of the switch. The switching speed of the switch is determined by the spring and has nothing to do with the manual speed. After installing automation instruments, remote sensing and remote control can be realized.

Parameter	Value
Rated Voltage	12 kV
Rated Current	630 A
Rated Short-Circuit Making Current	50 kA/peak
Rated Short-Time Withstand Current	20 kA / 2s
Insulation Medium	SF₆ gas, sealed tank
Mechanical Life	≥ 5000 operations
Electrical Endurance	≥ 100 operations at rated load
Rated Frequency	50/60 Hz
Standards Complied	IEC 62271-103 / GB 3804

🏢 Typical Application Scenarios

• Ring Main Units (RMUs) in compact substations

• Pole-mounted secondary substations for 10/11kV grids

• Industrial indoor switchgear panels

• Switch rooms in commercial buildings

• Medium-voltage distribution automation systems

🌟 Product Highlights

• Sealed SF₆ tank, maintenance-free for 10+ years

• Visible disconnect point improves operational safety

• Spring-operated mechanism with manual or motorized option

• Small footprint, perfect for retrofit or space-constrained rooms

• Compatible with remote SCADA interface (optional)

💬 Real Customer Reviews (English-Speaking Markets)

🗣️ William H., MV Project Manager – E.ON UK
“FLN36-12D is our go-to switch for city RMUs. Reliable insulation and compact structure save panel space.”
📌 Source: E.ON Panel Selection Review, 2023

🗣️ Amy R., Switchgear Engineer – Cape Town Metro Power
“Gas-sealed load break switches like FLN36-12D reduce our maintenance in coastal zones.”
📌 Source: Municipal Asset Maintenance Brief, 2022

🗣️ Juan T., Technical Supervisor – Intermountain Power, USA
“We've tested several indoor SF6 models, and FLN36-12D offers stable performance under switching surge.”
📌 Source: MV Switchgear Test Records, 2023

🗣️ Liam F., Grid Planner – Ausgrid, Australia
“Excellent for ring automation and indoor switchgear retrofits. Clean arc-quenching, low failure rate.”
📌 Source: Ausgrid Equipment Evaluation Memo, 2022

🗣️ Grace B., Electrical Consultant – Hydro One, Canada
“Rated for 630A continuous and holds up in -30°C winters. No SF6 leakage found during yearly checks.”
📌 Source: Hydro One Substation Inspection Report, 2023

❓ Frequently Asked Questions

• What’s the main benefit of SF₆ insulation in this switch?
It ensures compact size, excellent dielectric strength, and low maintenance compared to air-insulated designs.

• Does the switch support motorized remote control?
Yes, a motorized mechanism is available for remote SCADA or automation integration.

• How often does it require gas refilling?
The switch is sealed for life under normal use. SF₆ leakage is <0.1% annually.

• Can this switch be used in retrofit applications?
Absolutely. Its small footprint and panel compatibility make it ideal for upgrading old air-insulated panels.

• What certifications are available?
Tested according to IEC 62271-103 and supplied with complete type test reports.