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Zinc oxide lightning arrester and manufacturing method thereof

A lightning arrester and zinc oxide technology, which is applied in the manufacture of resistors, resistors, overvoltage protection resistors, etc., can solve the problems of waste in the electrical sector, damage to power distribution equipment, and short service life of lightning arresters, so as to prolong the service life Effect

Inactive Publication Date: 2012-07-04
HENAN BOTE ELECTRIC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to the frequent occurrence of atmospheric overvoltage, the arrester is in action every time, and when the overcurrent is released every time, a strong heat is generated. However, the gapless zinc oxide arrester cannot suppress the arc for the strong current, and the main body is fully enclosed. Type, the heat is difficult to dissipate in a short time, so the aging of the zinc oxide resistor is accelerated, and it loses its proper protection function after multiple actions, and the surface cannot be seen. Voltage, operating overvoltage, lightning overvoltage), it cannot operate, that is, it loses its protection function, and the power distribution equipment will be seriously damaged, even causing disasters
The above reasons lead to the short service life of the arrester, which requires professionals to conduct inspections and inspections, which brings great waste and economic losses to the electrical sector

Method used

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  • Zinc oxide lightning arrester and manufacturing method thereof
  • Zinc oxide lightning arrester and manufacturing method thereof
  • Zinc oxide lightning arrester and manufacturing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Embodiment 1: (1), dry the resistor sheet with qualified tissue, the drying temperature is 80°C, and the drying time is 12 hours;

[0022] (2) Wrap the dried resistance sheet with a weft-free tape made of epoxy glass fiber;

[0023] (3) After putting the wound resistance sheet on the shelf to fix the height of the structure, bake it again. The temperature during baking is 120°C, and bake for 12 hours;

[0024] (4) After the resistor is cooled, test the leakage voltage value of the arrester under the condition of a DC current of 1mA;

[0025] (5) After drying the winding and passing the test, heat the arrester to 120°C, apply the coupling agent, and then perform high-temperature compression molding under the conditions of a pressure of 10MP and a temperature of 165°C. The film pressing time is 360″;

[0026] (6) The arrester that has been laminated is tested according to the detection standard of the arrester.

Embodiment 2

[0027] Embodiment 2: (1), dry the resistance sheet with qualified structure, the drying temperature is 100 ℃, and the drying time is 11 hours;

[0028] (2) Wrap the dried resistance sheet with a weft-free tape made of epoxy glass fiber;

[0029] (3) Put the wound resistance sheet on the shelf to fix the height of the structure, then bake again, the temperature during baking is 120°C, and bake for 15 hours;

[0030] (4) After the resistor is cooled, test the leakage voltage value of the arrester under the condition of a DC current of 1mA;

[0031] (5) After drying the winding and passing the test, heat the arrester to 120°C, apply the coupling agent, and then perform high-temperature compression molding at a pressure of 10MP and a temperature of 168°C. The film pressing time is 330″;

[0032] (6) The arrester that has been laminated is tested according to the detection standard of the arrester.

Embodiment 3

[0033] Embodiment 3: (1), dry the resistive sheet with qualified tissue, the drying temperature is 120 ℃, and the drying time is 10 hours;

[0034] (2) Wrap the dried resistance sheet with a weft-free tape made of epoxy glass fiber;

[0035] (3) Put the wound resistance sheet on the shelf to fix the height of the structure, then bake again, the temperature during baking is 120°C, and bake for 18 hours;

[0036] (4) After the resistor is cooled, test the leakage voltage value of the arrester under the condition of a DC current of 1mA;

[0037] (5) After drying the winding and passing the test, heat the arrester to 120°C, apply the coupling agent, and then perform high-temperature compression molding under the conditions of a pressure of 10MP and a temperature of 170°C. The film pressing time is 300″;

[0038] (6) The arrester that has been laminated is tested according to the detection standard of the arrester.

[0039] The testing items include DC reference voltage test, sa...

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Abstract

The invention relates to a zinc oxide lightning arrester and a manufacturing method of the lightning arrester. A gapless zinc oxide resistor disc is connected in series with a three-phase power line respectively. Then the three-phase lines are connected in parallel. A zinc oxide resistor disc with gaps is connected in series between the three-phase parallel connection node and the ground. The lightning arrester disclosed by the invention is capable of protecting the lightning arrester itself from being damaged. Meanwhile, the shortcoming that lightning arrester ageing is caused by high heat is avoided. Therefore, the service life of the lightning arrester is also prolonged.

Description

technical field [0001] The invention relates to a zinc oxide arrester and a manufacturing method thereof. Background technique [0002] At present, gapless zinc oxide surge arresters (both packaged and molded) are commonly used in the national grid, and are used in power distribution and power stations. Such as figure 1 Shown: The gapless zinc oxide arrester currently used is to connect a gapless zinc oxide resistor in series on the three-phase power lines A, B, and C respectively, and then the three-phase power lines A, B, and C are connected to the ground in parallel. Usually this gapless zinc oxide arrester works against atmospheric overvoltage and lightning overvoltage (usually one-time damage). However, due to the frequent occurrence of atmospheric overvoltage, the arrester is in action every time, and when the overcurrent is released every time, a strong heat is generated. However, the gapless zinc oxide arrester cannot suppress the arc for the strong current, and th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01C7/12H01C17/00
Inventor 许留柱王柳季刚张利李彭涛李文姜文峰侯文昌李红华
Owner HENAN BOTE ELECTRIC
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