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Transient high-voltage protection circuit for fixed fax machines

A facsimile machine and resistance technology, applied in emergency protection circuit devices, emergency protection circuit devices, and circuit devices used to limit overcurrent/overvoltage, can solve problems such as human injury, inconvenient work, and facsimile machine damage, and achieve The effect of preventing lightning strikes

Inactive Publication Date: 2015-05-06
CHENGDU KEHONG ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Today, with the rapid development of information, the fax machine is an important tool for document exchange between enterprises, but the external line may have a momentary high voltage due to voltage instability, or the fax machine may be damaged by accidental lightning strikes during a thunderstorm, causing inconvenience in work, and May cause injury to people due to high voltage

Method used

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  • Transient high-voltage protection circuit for fixed fax machines

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Embodiment Construction

[0009] The present invention will be further described below in conjunction with accompanying drawing:

[0010] Such as figure 1 As shown, the present invention is used for the instantaneous high voltage protection circuit of a fixed facsimile machine, including a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, first diode D1, second diode D2, third diode D3, fourth diode D4, fifth diode D5, sixth diode D6, seventh diode D7 , eighth diode D8, ninth diode D9, tenth diode D10, first capacitor C1, second capacitor C2, third capacitor C3, first variable resistor RL1, second variable resistor RL2 , triode VT, inductance L and bidirectional thyristor SCR, the anode of the first diode D1 is respectively connected with the first end of the first resistor R1 and the first input end of the facsimile machine, and the cathode of the first diode D1 is respectively connected with the first ...

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Abstract

The invention discloses a transient high-voltage protection circuit for fixed fax machines, comprising a first resistor, a second resistor, a third resistor, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, a first diode, a second diode, a third diode, a fourth diode, a fifth diode, a sixth diode, a seventh diode, an eighth diode, a ninth diode, a tenth diode, a first capacitor, a second capacitor, a third capacitor, a first variable resistor, a second variable resistor, a triode, an inductor, and a bidirectional thyristor. The transient high-voltage protection circuit for fixed fax machines of the invention can effectively prevent damage of lightning and accident line overvoltage to fax machine equipment, and has no impact on the operation of fax machines.

Description

technical field [0001] The invention relates to a protection circuit, in particular to an instantaneous high voltage protection circuit for a fixed facsimile machine. Background technique [0002] Today, with the rapid development of information, the fax machine is an important tool for document exchange between enterprises, but the external line may have a momentary high voltage due to unstable voltage, or the fax machine may be damaged by accidental lightning strikes in thunderstorms, causing inconvenience in work. Human injury may be caused by high voltage. Contents of the invention [0003] The object of the present invention is to provide a transient high voltage protection circuit for a fixed facsimile machine in order to solve the above problems. [0004] The present invention achieves the above object through the following technical solutions: [0005] An instantaneous high voltage protection circuit for a fixed fax machine, comprising a first resistor, a second ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 袁刚向龙
Owner CHENGDU KEHONG ELECTRONICS
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