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Home > Products > 24kV Indoor HV Load Switch > Hot Sale Indoor High-Voltage Load Break Switch-Fzn24D

Hot Sale Indoor High-Voltage Load Break Switch-Fzn24D

Basic Info

Model No.:  FZN24D

Product Description

Model NO.: FZN24D

Function: as Independent Electrical Units in Power System

Environment: Indoor High Voltage

Phase No.: 3

Origin: Jiangyin Yunfeng, China

Applied: in The AC 50Hz Network

Features: Flexible & Reliable Action

Certification: ISO9001, Ce, SGS

Trademark: YF

Product Overview

YFZN-24/T630-20 indoor AC HV Vacuum Load Switch("vacuum load switch") and YFZRN-24D/T125-31.5 indoor AC HV vacuum load switch-fuse combination unit("combination unit") are products designs and developed independently by our company according to GB3804 and GB16926. They are applied in the AC 50Hz network with the rated voltage of 24kV and are specially designed for 24kV and users and box-type substations. They can be also applied in the power system as independent electrical units. The products have reasonable and scientific structure,flexible and reliable action and obvious isolating fracture. The combination unit can be used with the series firing-pin fuse, and the fuse is safe and easy for replacement.

Model Specification

Indoor AC HV vacuum load switch

Hot Sale Indoor High-Voltage Load Break Switch-Fzn24D

Hot Sale Indoor High-Voltage Load Break Switch-Fzn24D


a.reasonable and scientific structure

b.flexible and reliable action

c.obvious isolating fracture

Service Conditions


2.Ambient temperature-25ºC-+ 40ºC;

3.The daily average of relative humidity shall not be larger than 95% and the monthly average shall not be larger than 90%:

4.The ambient air shall not be subject to the obvious pollution such as corrosive or combustible gas and steam;

5.The site without fire hazards and explosion hazards;

6.The site that the seismic intensity does not exceed degree 8; the gradient shall not exceed 5°

Main Techincal Parameters

Serial No. Item Unint YFZN24 Vacuum Load Switch
1 Rated voltage KV 24
2 Rated frequency Hz 50
3 Rated current A 630
4 Rated short-circuit breaking current kA ---
5 Rated active load breaking current A 630
6 Rated closed loop breaking current A 630
7 Rated cable charging breaking current A 16
8 Rated short-circuit making current kA 50
9 Rated short-time withstand current ---Load switch(including disconnector)
---Earthing Switch
kA/s 20/4
10 Rated breaking-transfer(handover) current A ---
11 1min power-frequency withstand voltage(effective value) to earth, phase-to-phase, vacuum fracture/isloating fracture kV/kV 65/79
12 Full-wave lightning impulse withstand voltage(peak)to earth,phase-to-phase, vacuum fracture/isolating fracture kV/kV 125/145
13 Main loop resistance μΩ ≤80
14 Rated breaking current of single capacitor bank A 630
15 Rated back-to-back breaking current of capacitor bank A 400
16 Mechanical life Time 2000
17 Clearance between open contacts m m 12±1
18 Gross thickness of contact wear m m 3
19 Average opening speed m/s 1.1-1.7
20 Average closing speed m/s 0.8-1.2
21 Rated contact pressure N 2500±200
22 Contact closing bounce time ms ≤2
23 Three-phase opening and closing asynchronization ms ≤1
24 Inter-pole center distance mm 275±3
25 Distance between live parts and of phase to earth mm ≥180
26 Closing operation torque of vacuum arc-extinguishing chamber N. M ≤90
27 Opening operation torque of vacuum arc-extinguishing chamber N ≤10
28 Rated opening operation voltage V ≌220/110

Main Technical Parameters of Operation Mechanism

Permanent-magnet Single-phase DC Engergy Storage Closing Motor

Rated Voltage Rated Output Power Normal Operating Voltage Range
AC/DC220V:110V ≤70W 85%-110% of rated voltage

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Product Categories : 24kV Indoor HV Load Switch