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Electric leakage protection switch capable of resisting ultrahigh surge voltage

A leakage protection switch and surge voltage technology, applied in the electrical field, can solve problems such as leakage switch damage

Inactive Publication Date: 2017-05-24
WUXI WANJI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the leakage switches used in common chips on the market can only resist the surge voltage of 4000V. This surge voltage generally appears as a lightning strike. If the signal of the lightning strike is very strong, the general leakage switch will be damaged by the lightning strike signal.

Method used

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  • Electric leakage protection switch capable of resisting ultrahigh surge voltage
  • Electric leakage protection switch capable of resisting ultrahigh surge voltage

Examples

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Effect test

Embodiment 1

[0021] Such as figure 1 Shown is a structural schematic diagram of the leakage protection switch capable of resisting ultra-high surge voltage of the present invention. Its working principle is introduced as follows:

[0022] 1: The surge voltage processing module is responsible for absorbing extremely high surge voltage signals from the outside. There are four components in total, choke coil T1, varistor RV1, absorption inductance H1, and varistor RV2. These 4 components Some are connected in series. When a lightning strike occurs, if the extremely high surge voltage of the lightning strike is input into the module, the choke coil T1 will firstly block the abruptly high surge voltage, and the extremely high surge voltage will be blocked. The voltage signal is attenuated, and it also plays the role of limiting the sudden current formed by this voltage, and then the high-voltage signal is absorbed by the first level through the varistor RV1 at the back. The current limiting ...

Embodiment 2

[0029] Such as figure 2 It is a circuit schematic diagram of the leakage protection switch capable of resisting ultra-high surge voltage of the present invention.

[0030] RV1, RV2 varistors and T1, H1 inductors form an anti-surge system to prevent excessive external shock voltage from damaging other components in the circuit. The external input 220V AC is rectified into pulsating DC through the rectifier bridge B1, and then the pulsating DC Through the step-down of the resistor R1 and the filter function of the C1 capacitor, it becomes a low-voltage pure direct current, and this pure direct current provides power to the chip U1 through pin 8 of the chip. When there is a leakage in the circuit, the transformer ZCT will collect the leakage signal. The collected signal is a low-voltage AC signal, which is sampled by the resistor R2 and input to the pin 2 of the chip U1 chip through the function of the de-interference capacitor C2. , when the voltage of the leakage signal at pi...

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Abstract

The invention discloses an electric leakage protection switch capable of resisting ultrahigh surge voltage, and belongs to the electricity technology field. The electric leakage protection switch capable of resisting the ultrahigh surge voltage is used for protection of 7000V surge voltage, and therefore good protection of a product is realized. According to the electric leakage protection switch, under a condition of guaranteeing the electric leakage protection function of the electric leakage switch, the electric leakage protection switch can work normally during a strong lightning stroke. The electric leakage protection switch is used for household or other power protection occasions, and is used for protecting personal safety and safety of power equipment and preventing problems caused by the electric leakage.

Description

technical field [0001] The invention relates to a leakage protection switch capable of resisting ultra-high surge voltage, and belongs to the field of electrical technology. Background technique [0002] The above-mentioned commonly used leakage switches capable of resisting surge voltage are generally based on the function of resistance absorption, and can resist the surge voltage through the absorption of series connected resistors. At present, the leakage switches used in common chips on the market can only resist the surge voltage of 4000V. This surge voltage generally appears as a lightning strike. If the signal of the lightning strike is very strong, the general leakage switch will be damaged by the lightning strike signal. . Contents of the invention [0003] In order to solve the above problems, the present invention provides a leakage protection switch capable of resisting ultra-high surge voltage, which can protect the 7000V surge voltage, and can well protect t...

Claims

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Application Information

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IPC IPC(8): H02H9/04H01H71/00
CPCH02H9/042H01H71/00
Inventor 雷怀强科华
Owner WUXI WANJI TECH CO LTD
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