FN3-10R Load Break Switch | 10kV 400A Indoor Isolator

The FN3-10R/400A indoor load break switch is a compact disconnector designed for 10kV AC distribution systems. It provides reliable load switching and visible isolation within indoor metal-enclosed switchgear such as XGN15 or GGD cabinets. Rated at 400A, it is widely used for medium-voltage feeder control and transformer protection.

🔧 Key Features

• Rated voltage: 10kV, rated current: 400A

• Air-insulated, manually operated load switch

• Arc-extinguishing via arc chute and knife-type contacts

• ON / OFF / EARTH three-position configuration

• Compact footprint, suitable for cabinet integration

• High electrical and mechanical endurance

• Can be paired with fuses for transformer protection

📐 Technical Specifications

✅ Compliance & Standards

• GB3804 – High-voltage AC load switches

• IEC 62271-103 – Switches for rated voltages above 1kV

• ISO 9001, ISO 14001, ISO 45001 certified

• CE marked and routinely tested before shipment

🧰 Typical Applications

• 10kV indoor metal-enclosed switchgear

• Load feeder isolation in industrial power systems

• Transformer protection in compact substations

• Auxiliary power switching in commercial buildings

• Air-insulated panel retrofits or upgrades

🌍 Real Case Example: Food Plant Upgrade – Vietnam (2022)

In 2022, a food processing facility in southern Vietnam installed FN3-10R/400A switches in its new 10kV indoor cabinet line. These switches replaced outdated isolators in XGN15 panels and improved operational safety.

Key benefits:
– Compact fit into existing cabinet slots
– Manual ON/OFF + EARTH operations ensured visible safety
– Increased operational lifespan with arc chute protection

❓ Frequently Asked Questions (FAQ)

What’s the difference between FN3 and FN5 series switches?
FN3 uses an air-insulated arc chute system with knife-type contacts, while FN5 typically includes enhanced arc-quenching chambers for higher breaking capacity.

Can FN3-10R be used with fuses?
Yes. It can be combined with HRC fuses for transformer and feeder protection.

Is this switch suitable for retrofitting older panels?
Yes. Its standard footprint makes it compatible with most 10kV switchgear enclosures.

Does it support motorized operation?
No. This model is designed for manual spring-loaded operation only.

What’s the typical delivery time?
Around 10–15 working days, depending on quantity and optional accessories.

📞 Contact for Drawings or Support

Let us help you match the FN3-10R switch to your cabinet or project:

• Engineer: Thor

• Company: Wei Shoe Elec

• 📞 Phone: +86-0577-62788197

• 📱 WhatsApp: +86 159 5777 0984

• 📧 Email: [email protected]