High Voltage Breaker

High Voltage Breaker

Details
Rated Voltage: 12 kV
Rated Current: 630A/1250A/1600A/2000A/2500A/3150A/4000A
Short-Circuit Breaking Capacity: 20 kA
Short-Time Withstand Current: 20 kA
Lightning Impulse Withstand Voltage: 75 kV (peak)
Mechanical Life: 30,000 times
Rated Frequency: 50 Hz
Category
Circuit Breaker
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Description
Technical Parameters

Products Introduction

High Voltage Breaker

High-voltage circuit breakers are used in power networks to open and close high-voltage circuits, and they can cut off current quickly when short circuits or overloads appear. This helps protect equipment such as grids, transformers, and transmission lines. They are commonly used in substations, transmission routes, and large industrial sites, and can run for long periods even in outdoor or heavy-duty environments

working condition
product advantage

Product Design&Structure

 

The breaker is built for long-term service under high voltage. Each part has been checked through practical use. The internal layout is arranged so current can pass smoothly and heat-related issues are reduced.

 

The outer housing uses strong, corrosion-resistant materials that handle wind, rain, dust, and temperature changes. It also offers protection against impact. The sealed structure keeps out moisture and slows down insulation aging.

 

Inside, the arc-extinguishing section uses suitable media and a chamber layout that helps stop arcs quickly during faults, reducing wear on the contacts. The contacts themselves use alloy materials with good conductivity and long wear life.

 

The operating mechanism allows quick opening and closing. Springs, rods, and related parts are tested to handle repeated use without mechanical problems.

 

The insulation layout uses proper distance and materials that can handle high voltage. Cables are arranged in fixed channels to limit interference and make future checks easier.

 

Modules such as the arc chamber, operating mechanism, and small transformers follow a unified style, making production, installation, and later replacement more convenient. The breaker can be used together with other power-related equipment without compatibility issues.

 

Product Drawing

Drawing

Product Applications

applications

Product Specifications

 

Number Parameter name Unit Technical Parameters
1 Rated voltage kV 12
2 Rated short-time frequency withstand voltage (1 min) kV 42
3 Rated lightning impulse withstand voltage (peak) kV 75
4 Rated frequency Hz 50
5 Rated current A 630/1250/1600/2000/2500/3150/4000
6 Rated short-circuit breaking current kA 20 25 31.5 40
7 Rated short-time withstand current kA 20 25 31.5 40
8 Rated short circuit duration S 4
9 Rated short-circuit closing current kA 50 63 80 100
10 Rated peak withstand current kA 50 63 80 100
11 Number of rated short-circuit current starts times 30 30 30 20
12 Rated individual capacitor bank opening current A ≤630
13 Rated back-to-back capacitor bank opening current A ≤400
14 Rated capacitor bank closing inrush current kA 12.5(frequency≤1000Hz)
15 Closing time ms ≤80
16 Split time ms Maximum Voltage ≤40
ms Rated Voltage ≤50
ms Minimum Voltage ≤60
17 Time of ignition ms ≤15
18 Mechanical life (M2) times 30000
19 Allowable cumulative thickness of dynamic and static contact wear mm 3
20 Rated closing operating voltage V AC/DC 220, AC/DC 110
21 Rated breaking operating voltage V AC/DC 220, AC/DC 110
22 Rated operating voltage of energy storage motor V AC/DC 220, AC/DC 110
23 Rated power of energy storage motor W 80 (40KA Motor speed 100W)
24 Energy storage time s ≤15
25 Contact opening distance mm 9±1
26 Over traveling distance mm 3.5±0.5
27 Contact closing bounce time ms ≤2
28 Three-phase switching and closing non-synchronous ms ≤2
29 Contact splitting rebound amplitude mm ≤3
30 Contact closing contact pressure kA 20 25 31.5 40
N±8% 2200 2500 3100 4750
31 Average breaking speed (contacts separated by 6mm) m/s 1.1±0.2
32 Average closing speed (6mm contact closure) m/s 0.6±0.2
33 Dominant electric circuit resistance A 630 1250 1600-2000 ≥2500
34 μΩ ≤50 ≤45 ≤35 ≤25
Rated operating sequence (1) 20~31.5KA   Minutes - 0.3s - combined minutes - 180s - combined minutes
35 Rated sequence of operation (2) 40KA   Minutes - 0.3s - combined minutes - 180s - combined minutes
Secondary circuit frequency withstand voltage (1min) V 2000

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