YFN5-12 / YFN5-12R(T)D

The YFN5 (FN5)-12 series indoor AC high-voltage gas-producing load switch and fuse combination device is primarily designed for use in 12kV AC networks, where it serves to switch rated load currents and make/clear short-circuit currents. Its performance fully complies with the national standards GB3804-2004 "High-Voltage AC Load Switches from 3.6kV to 40.5kV" and GB16926-2009 "High-Voltage AC Load Switch-Fuse Combination Devices." This combination device is capable of interrupting short-circuit currents and features a single-phase fuse triggering a three-phase trip mechanism, making it the ideal choice for protecting lines, equipment, and transformers.

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Product Description

Product Overview

The YFN5 (FN5)-12 series indoor AC high-voltage gas-producing load switch and fuse combination apparatus is primarily designed for use in 12kV AC networks, where it serves to switch rated load currents and make/clear short-circuit currents. Its performance complies with the national standards GB3804-2004 "High-Voltage AC Load Switches from 3.6kV to 40.5kV" and GB16926-2009 "High-Voltage AC Load Switch-Fuse Combination Apparatus." This combination device is capable of interrupting short-circuit currents and features a single-phase fuse triggering a three-phase trip mechanism, making it an ideal choice for protecting lines, equipment, and transformers.
This series of load switches features compact size, lightweight design, a simple yet well-structured and reasonable construction, minimal operating force, reliable performance, and convenient maintenance. They can be installed either wall-mounted or integrated into high-voltage switchgear, making them a cost-effective and highly advantageous choice for high-voltage load switching applications.

Model Description

Environmental operating conditions

1. Altitude ≤ 1000 m;
2. Ambient temperature range: -25°C to +40°C;
3. The daily average relative humidity should not exceed 95%, and the monthly average should not surpass 90%.
4. The surrounding air is not noticeably contaminated by dust, smoke, corrosive and/or flammable gases, vapors, or salt spray;
5. Areas free from fire and explosion hazards;
6. Locations with seismic intensity not exceeding 8 degrees and slope no greater than 5°.
Note: The above outlines the standard operating conditions according to GB/T 11022. If your application requires special environmental conditions—such as high altitude, heavy salt spray, or extremely cold or hot environments—you can modify the technical design and customize the product accordingly based on these requirements.

Main Technical Specifications

Structural Features

The multiple installation options for this high-voltage isolator switch meet a variety of customer requirements.
A: Installation Methods — Top-entry wiring (straight installation), bottom-entry wiring (inverted installation), or wall-mounted installation with a wall-mounted operating mechanism.
B: Operation Modes – Side-Panel Operation, Front-Panel Operation

Operating mechanism

Switch appearance