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Multi-stage power-supply lightning arrester

A lightning protection device and power supply technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of insufficient impulse current impedance, small inductance, poor reliability, etc. problem, to achieve the effect of large inductance, large discharge current, and reduced requirements

Inactive Publication Date: 2003-08-27
GUANGZHOU SAIFU CREATIVE LIGHTING
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AI Technical Summary

Problems solved by technology

[0002] In the Chinese patent "Composite Lightning Arrester for Large-Load and Large-current Power Supply" (ZL Patent No. 01206146.8), a power surge arrester with a secondary lightning protection circuit is disclosed. The amount is small, and the impedance to the surge current caused by lightning is still not large enough
Its first-level lightning protection circuit consists of at least five varistors connected in parallel or a large current discharge tube or a gas discharge tube in series with varistors. Multiple discharge elements are used in parallel or in series. Avalanche damage often occurs under the action, so the reliability is poor, arc jumping is easy, and the service life is short

Method used

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  • Multi-stage power-supply lightning arrester
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Embodiment Construction

[0012] Below, the present invention will be described in detail in conjunction with the accompanying drawings.

[0013] figure 1 Among them, the reactor 4 is connected between the power input terminal 5 and the electrical equipment terminal 6, and the first-level lightning protection circuit 1 is connected between the power input terminal 5 and the lightning protection ground 7, which is a closed spark gap with large discharge current. Both the second-level lightning protection circuit 2 and the third-level lightning protection circuit 3 are connected between the electrical equipment terminal 6 and the lightning protection ground 7 to form a three-level power supply lightning protection device. The huge pulse current formed by lightning on the power transmission line must first be discharged as much as possible in the first-level lightning protection circuit 1. For this reason, the reactor 4 should obtain as large an inductance as possible with as few turns as possible. Ther...

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Abstract

The lighting protector comprises the power input end, the consumer end and the lightning protection ground. The characters are that the reactor is connected between the power input end and the consumer end. The first stage lighting protection circuit as sealed type spark gap is connected between the power input end and the lightning protection ground. The second and the third lightning protection circuit are connected between the consumer end and the lightning protection ground. The second lightning protection circuit is a metallization thin film capacitor, and the third lightning protection circuit is zinc oxide piezoresistor. The reactor possesses the magnetic core with high magnetic inductivity. Flat copper wire is used for the connecting wire.

Description

technical field [0001] The invention belongs to a power supply lightning protection device, in particular to a multi-stage power supply lightning protection device. Background technique [0002] In the Chinese patent "Composite Lightning Arrester for Large-Load and Large-current Power Supply" (ZL Patent No. 01206146.8), a power surge arrester with a secondary lightning protection circuit is disclosed. The amount is small, and the impedance to the surge current caused by lightning is still not large enough. Its first-level lightning protection circuit consists of at least five varistors connected in parallel or a large current discharge tube or a gas discharge tube in series with varistors. Multiple discharge elements are used in parallel or in series. Avalanche damage tends to occur under the action, so the reliability is poor, arc jumping is easy, and the service life is short. The lightning impulse current cannot exceed 100KA, and the residual voltage is about 1000V, whi...

Claims

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Application Information

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IPC IPC(8): H02H9/04H02H9/06
Inventor 齐加明秦兵伟欧阳文
Owner GUANGZHOU SAIFU CREATIVE LIGHTING
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