YFZN25-12 / YFZRN25-12D

The YFZN25 (FZN25)-12 indoor AC high-voltage vacuum load switch and load switch-fuse combination device (hereinafter referred to as the "combination device") is a control and protection unit designed for 50Hz, 12kV three-phase AC distribution systems. It is widely used in industrial and mining enterprises, urban building substations, and other similar facilities—particularly well-suited for ring-network-connected distribution systems. The operating mechanism supports both manual and electric operation, making it easy to meet the "three-remote" requirements of power systems. Its performance complies with the standards specified in GB 3804-2004, "High-Voltage AC Load Switches Rated from 3.6kV to 40.5kV," and GB 16926-2009, "High-Voltage AC Load Switch-Fuse Combination Devices."

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Product Description

Product Overview

The YFZN25 (FZN25)-12 indoor AC high-voltage vacuum load switch and load switch-fuse combination device (hereinafter referred to as the "combination device") is a control and protection apparatus designed for 50Hz, 12kV three-phase AC distribution systems. It is widely used in industrial and mining enterprises, urban building substations, and other similar facilities—particularly well-suited for ring-network-connected distribution systems. The operating mechanism supports both manual and electric operation, making it easy to meet the "three-remote" requirements of power systems. Its performance complies with the standards specified in GB 3804-2004, "High-Voltage AC Load Switches Rated from 3.6kV to 40.5kV," and GB 16926-2009, "High-Voltage AC Load Switch-Fuse Combination Devices."

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 angles 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—custom technical designs can be modified and tailored accordingly based on these requirements.

Main technical specifications

Switch shape

Switchgear Cabinet