Function of high voltage arrester:
Zinc oxide arrester is the world's most advanced overvoltage protection device. A necessary condition for the safe operation of power systems is to protect electrical equipment from atmospheric overvoltage and operating overvoltage.
Introduction to high voltage arrester:
Fused zinc oxide arrester.
HY5WS-17/50 zinc oxide arrester.
10KV high voltage power distribution class A composite arrester.
Specifications: HY5WS-17/50 Rated voltage: 17KV.
Product name: Zinc oxide arrester DC reference voltage: 25KV.
Continuous working voltage: 13.6KV square wave flow: 100A.
Resistance to wave impact current: 57.5KV (lower residual voltage) Resistance to large current impact: 65KA.
38.5KV (below residual voltage) operating impulse current
Note: High voltage is dangerous! When doing any work, you must first cut off the power supply, strictly abide by the operating procedures and regulations to prevent electric shock and fire accidents.
Usage environment:
a. The height shall not exceed 2,000 meters;
Ambient temperature: no more than +40C-40C;
Relative humidity of the surrounding environment: the average value does not exceed 85%;
d. The earthquake intensity does not exceed magnitude 8;
e. Installation location: a place without fire, flammable, explosive, dirt, chemical corrosion and severe vibration.
Small and light,
Collision-resistant transportation without contact loss,
Especially suitable for flexible installation of switch cabinets.
17/45HY5WZ-17/45 high voltage zinc oxide arrester.
10KV type metal zinc oxide arrester.
Minrong 35KV high voltage arrester.
HY5WZ-51/134。
Outdoor power station type
Composite zinc oxide arrester.
Metal oxide arrester
Principle of high voltage arrester:
Under normal operating voltage, zinc oxide varistor sheets with excellent nonlinear volt-ampere characteristics (V-A characteristics are shown in Figure 1) have a high resistance value under normal operating voltage, and the leakage current is only microampere level; when overvoltage attacks, it immediately changes to a low resistance state, releases energy, and limits the overvoltage range; after the overvoltage disappears, it immediately returns to high resistance to ensure normal operation of the power system. Utilizing the excellent properties of zinc oxide, the arrester has fast action, stable performance, simple structure, reduced volume, easy maintenance, large flow, low residual pressure, and long service life. Voltammetric characteristics.
Name the lightning arrester.
For example: YH5WZ-51/134W has a corresponding residual voltage of 134kV, rated voltage 51kV, anti-pollution, power station type 1, composite lightning protector.
The main technical parameters of the flame arrester.
Zinc oxide arrester has three main parameters: zinc oxide arrester rated voltage, zinc oxide arrester rated voltage, and zinc oxide arrester absorption capacity.
Rated voltage of zinc oxide arrester: The effective value of the maximum allowable power frequency voltage is applied between the terminals of the arrester. According to the voltage involved, the arrester can operate normally under the temporary overvoltage conditions determined in the operating load test.
Standard residual pressure: The maximum voltage peak between the terminals when the discharge current passes through the arrester.
Lightning protection capability: that is, the current that the square wave flow capacity arrester can withstand without being damaged.
1. Rated voltage of zinc oxide arrester.
The 100 in the above model refers to the rated voltage. The definition of nominal voltage is more complex. As a non-professional production person, zinc oxide arresters can only work normally when the effective value of the overvoltage is about 100kV. This parameter cannot be too low, otherwise it will easily cause the zinc oxide arrester to be overloaded and burned out.
2. Rated residual pressure of zinc oxide arrester.
The 260 in the above model represents the residual voltage of a lightning strike. Simply put, when the most severe lightning strike occurs, the arrester can limit the overvoltage peak to less than 260kV. In fact, this parameter is the most important parameter of the arrester, because the insulation coordination of the entire system is based on this. It is often said that due to the reduction of the residual voltage of the arrester, the safety margin of all high-voltage electrical appliances in the system is reduced. Due to the performance limitations of the zinc oxide resistor itself, there is a limit to the reduction of residual voltage.
3. Energy absorption performance of zinc oxide arrester.
When the lightning protection device is working, it will be greatly heated due to the strong flow of ka level. Failure to heat may cause damage or even explosion. Therefore, the energy absorption performance of the lightning protection device is an important indicator. Representation of square wave flow. The higher the value, the greater the current the arrester can withstand without being damaged, and the better its performance. This performance is directly related to the diameter of the resistor.
Lightning arrester manufacturer
Yichang Hengyuan Technology Co., Ltd. is located in Shilipu Industrial Park, Yidu City, Hubei Province, with beautiful environment and outstanding people. The company was founded in 1993 (its predecessor was Hubei Zhicheng Hengyuan Electrical Equipment Factory and Hubei Yidu Xiongdu Group Hengyuan Electrical Equipment Co., Ltd.). It is the earliest professional manufacturer of organic composite coated zinc oxide arresters in China, covering an area of nearly 20,000 square meters. The company is a modern national high-tech enterprise integrating product research and development, design, production and sales. The company has more than 30 patents and products. The company has sophisticated production equipment, complete testing facilities, and a high-quality technical personnel and management team.
