Aierway FKN12A-12D Pneumatic Load switch-Fuse Combination Unit

Product introduction

The FKN12A-12D pneumatic load switch and FKRN12A-12D series pneumatic load switch – fuse combination device are suitable for 12kV and below three-phase distribution systems. They serve for controlling and protecting power equipment such as transformers, cables, and overhead lines, particularly in urban/rural grid terminal substations and containerized substations. They are also applicable for control and protection in ring networks and dual radial power supply units.

FKN12A-12D Series Pneumatic Load Switch: Can switch load currents and overload currents. FKRN12A-12D Series Pneumatic Load Switch – Fuse Combination Device: Can switch load currents, overload currents, and interrupt line short-circuit currents.

Key Features

1. Integrated Protection & Switching
Combines a load break switch for normal circuit switching with HRC fuse links for short-circuit protection.
Provides full three-position isolation (ON, OFF, EARTHED) for safe maintenance.

2. Pneumatic Operating Mechanism
Compressed air-driven operation ensures fast, reliable, and consistent switching performance.
Lower mechanical stress and longer service life compared to spring-operated mechanisms.
Suitable for frequent operation and remote control applications.

3. Compact & Sealed Design
SF6 gas or dry air insulation provides excellent dielectric strength and arc quenching in a compact footprint.
Maintenance-free** sealed tank design, suitable for harsh environmental conditions.

4. Safety & Reliability
Visible isolation gap** for safe earthing and maintenance.
Interlocking systems** prevent incorrect operations.
Fuse protection ensures fast fault clearing, protecting downstream equipment.

Main Technical Parameters of Electric Motor