Surge absorption device

A surge absorption and varistor technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve the problem of expensive maintenance costs, low surge absorption efficiency, Complex production process and other problems, to achieve the effect of improving efficiency, beautiful and tidy PCB layout, and reducing costs

Inactive Publication Date: 2011-04-06
深圳市伟创电气有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a surge absorbing device to overcome the defects of low surge absorbing efficiency, complex production process and high maintenance cost in the prior art

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0024] When the equipment to be protected works in a three-phase four-wire system, the circuit connection schematic diagram of the surge absorbing device of this embodiment is as follows figure 1 As shown, a surge absorbing device includes 4 decoupling units, that is, 4 varistors. The varistor voltages of the varistors used in the 220V AC power supply system are AC 210V and AC 300V, and the flow capacity is Microsecond-level surge signal; the varistor voltage of the varistor used in the 380V AC power supply system is AC 300V and AC 385V, and the flow capacity is microsecond-level surge signal; the four varistors are respectively RV1 and RV2 , RV3 and RV4, one end of them is connected together, and the other end is respectively connected to the input end of the equipment to be protected. RV4 is connected to the access end of the protection ground, and RV1, RV2 and RV3 are connected to the input end of the three-phase power line of the equipment to be protected.

Embodiment 2

[0026] When the equipment to be protected works in a three-phase four-wire system, the circuit connection schematic diagram of the surge absorbing device of this embodiment is as follows figure 2 As shown, a surge absorbing device includes 4 decoupling units, that is, 4 safety capacitors. The capacitance of the safety capacitors is 10nF and 100nF, and the rated voltage is AC 250V and AC 275V; 4 safety capacitors The capacitors are respectively C1, C2, C3 and C4, one end of which is connected together, and the other end is respectively connected to the input end of the device to be protected. C4 is connected to the access end of the protection ground, and C1, C2 and C3 are connected to the input end of the three-phase power line of the equipment to be protected.

Embodiment 3

[0028] When the equipment to be protected works in a three-phase four-wire system, the circuit connection schematic diagram of the surge absorbing device of this embodiment is as follows image 3 As shown, the surge absorbing device includes four decoupling units: decoupling unit 1 , decoupling unit 2 , decoupling unit 3 , and decoupling unit 4 . Decoupling unit 1 is composed of C1 and RV1 in parallel, decoupling unit 2 is composed of C2 and RV2 in parallel, decoupling unit 3 is composed of C3 and RV3 in parallel, decoupling unit 4 is composed of C4 and RV4 in parallel, where C1, C2, C3 and C4 are safety capacitors, the capacitance of the safety capacitors is 10nF and 100nF, and the rated voltage is AC 250V and AC 275V; RV1, RV2, RV3 and RV4 are varistors, which are used in the 220V AC power supply system. The varistor voltage of the varistor is AC 210V and AC 300V, and the flow capacity is a microsecond surge signal; the varistor used in the 380V AC power supply system has a ...

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PUM

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Abstract

The invention discloses a surge absorption device which comprises a plurality of decoupling units, wherein one ends of the decoupling units are connected together, the other ends of the decoupling units are respectively connected with the input end of equipment to be protected, and the decoupling units can be piezoresistors, safety capacitors, or in the form of series / parallel connection of piezoresistors and safety capacitors. When the equipment to be protected works in the form of three-phase four-wire system, the input end of the equipment to be protected comprises a three-phase power wire access end and a safety access end; and when the equipment to be protected works in the form of single-phase three-wire system, the input end of the equipment to be protected comprises a single-phase power wire access end, a neutral wire access end and a safety access end. The surge absorption device has the advantages of improving the surge absorption efficiency, simplifying production process and reducing maintenance cost.

Description

technical field [0001] The invention relates to the technical field of electronic circuits, in particular to a surge absorbing device. Background technique [0002] The surge in electronic circuit design, as the name suggests, is "sudden electric wave", which expresses the same phenomenon as "current pulse" and "voltage pulse". From the perspective of the oscilloscope, in the stable current or voltage waveform, if you see a particularly prominent abnormal waveform or noise, and the waveform is several times or even tens or hundreds of times larger than the normal amplitude, it can be judged as surge. Generally speaking, there are two main reasons for the surge: one is the thunder surge generated by thunder and lightning, and the other is the switch shock surge caused by the opening and closing of the circuit. Lightning surges are generated by nature, so if the circuit must be used in areas prone to lightning, it is absolutely necessary to add appropriate surge absorption p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 骆鹏贾飞
Owner 深圳市伟创电气有限公司
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