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Full-electronic single-phase short circuit protecting circuit without spark

A single-phase short-circuit and protection circuit technology, which is applied in the direction of protection against overcurrent, can solve the problems of high cost, difficult to realize accurately, and limited power range, etc., and achieve the effects of low cost, convenient use, and wide application range

Inactive Publication Date: 2004-07-21
谢志强
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] At present, CN2271766 discloses a "Multifunctional Fireproof Safety Power Supply", which can prevent the occurrence of fire accidents caused by short circuits. The control circuit of this technology achieves its This method is difficult to accurately realize the requirements of power transmission and power-off data; in addition, the bidirectional thyristor used in the main circuit limits the power range and may cause false conduction voltage at the output terminal; there is also a CD-type safety isolation The transformer is used to achieve the single bare wire at the output end without electrification and limit the power consumption to ensure that there is no spark when the output end is short-circuited. The production process of the CD-type safety isolation transformer is relatively complicated, which will affect the power grid, with large losses, high noise, and high cost. , only suitable for small power range
The whole power supply is bulky and impractical

Method used

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  • Full-electronic single-phase short circuit protecting circuit without spark
  • Full-electronic single-phase short circuit protecting circuit without spark
  • Full-electronic single-phase short circuit protecting circuit without spark

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Embodiment Construction

[0009] The present invention is described in detail below in conjunction with accompanying drawing:

[0010] Before the present invention is used, the first potentiometer R1, the second potentiometer R2, the third potentiometer R3, and the fourth potentiometer R4 must be adjusted through an external single-phase voltage regulator, and the first relay J1 and the second relay J2 The setting of power-on and power-off parameters, so as to ensure short-circuit and no-spark protection.

[0011] Referring to Fig. 1, when the power is turned on: the first power transformer B1, the second power transformer B2, and the third power transformer B3 work simultaneously, and the first rectifier bridge D1, the second rectifier bridge D2, and the third rectifier bridge D3 work simultaneously. The work of the first rectifier bridge D1 causes the coil of the first relay J1 to be energized and closed, so that all the normally open contacts of the first relay J1 are closed, causing the coil of the...

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Abstract

The invention discloses an all-electronic short circuit protection circuit without spark in single phase. It includes main circuit, control circuit and short circuit protection loop. The main circuit is configured as follows: any one of the inpuf ends of phase lines of power supply is connected to a single-phase solid state relay, and then connected to the output end in the same phase. The control circuit consists of circuit A, B, C, D. Adjusting potentiometer by an exterior single-phase voltage regulator and setting parameters at on / off of the relay, the short cut protection without spark is realized. The invention has features of wider applicable range, high-power protectino, good effect for canceling spark, no noise and low cost, etc.

Description

[technical field] [0001] The invention relates to the technical field of electrical power protection, in particular to an all-electronic single-phase short-circuit non-spark protection circuit. [Background technique] [0002] At present, CN2271766 discloses a "Multifunctional Fireproof Safety Power Supply", which can prevent the occurrence of fire accidents caused by short circuits. The control circuit of this technology achieves its This method is difficult to accurately realize the requirements of power transmission and power-off data; in addition, the bidirectional thyristor used in the main circuit limits the power range and may cause false conduction voltage at the output terminal; there is also a CD-type safety isolation The transformer is used to achieve the single bare wire at the output end without electrification and limit the power consumption to ensure that there is no spark when the output end is short-circuited. The production process of the CD-type safety isol...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02H3/08
Inventor 谢志强
Owner 谢志强
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