YFZN-24 / YFZRN-24

The YFZN-24/T630-20 indoor AC high-voltage vacuum load switch (hereinafter referred to as the "Vacuum Load Switch") and the YFZRN-24D/T125-31.5 indoor AC high-voltage vacuum load switch-fuse combination unit (hereinafter referred to as the "Combination Unit") are independently designed and developed by our company in accordance with GB3804 and GB16926. They are suitable for 50Hz AC networks with a rated voltage of 24kV, specifically tailored for 24kV end-user applications and packaged substations—and can also be used as standalone electrical units within power systems. This product features a well-optimized design, and its spring-operated switch mechanism incorporates the company’s proprietary CTE2 two-stage transmission system, which has earned a national invention patent, ensuring simple, reliable, and dependable operation.

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Product Description

Product Overview

The YFZN-24/T630-20 indoor AC high-voltage vacuum load switch (hereinafter referred to as the "Vacuum Load Switch") and the YFZRN-24D/T125-31.5 indoor AC high-voltage vacuum load switch-fuse combination unit (hereinafter referred to as the "Combination Unit") are independently designed and developed by our company in accordance with GB3804 and GB16926. They are suitable for 50Hz AC networks with a rated voltage of 24kV, specifically tailored for 24kV end-user applications and packaged substations—and can also be used as standalone electrical units within power systems. This product features a well-optimized design, and its spring-operated switch mechanism incorporates the CTE2 two-stage transmission system, which has been independently developed by our company and awarded a national invention patent, ensuring simple, reliable, and dependable operation.

Model Description

Environmental Usage

1. Altitude ≤ 1000 m;
2. Ambient temperature range: -25°C to +40°C;
3. The daily average relative humidity does not exceed 95%, and the monthly average remains below 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. For special application environments such as high altitudes, heavy salt spray, or extremely cold/heat conditions, the technical design can be modified and customized based on these requirements.

Main technical specifications

Structural Features

The versatile installation options of this vacuum load switch meet a wide range of customer requirements.
A: Installation methods—top-entry wiring (straight installation), bottom-entry wiring (reverse installation), and wall-mounted installation (with a dedicated wall-mounting operating mechanism).
B: Operation Modes – Side-Panel Operation, Front-Panel Operation

Vacuum Load Switch

Electrical schematic diagram

Wall-mounted installation

Cabinet Layout Diagram