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Automatic disconnection method for realizing open circuit and short circuit of power supply through optocoupler

An automatic disconnection, optocoupler switch technology, applied in the direction of automatic disconnection emergency protection devices, power testing, circuit devices, etc. Effect

Active Publication Date: 2022-04-19
NINGBO JIANAN ELECTRONICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the product development stage, it is directly connected to the mains. During the debugging process, a short circuit or an open circuit may occur, which may cause the circuit breaker to be switched off. After the test, the power supply is directly unplugged. If the power supply is not turned off, there will also be safety hazards.

Method used

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  • Automatic disconnection method for realizing open circuit and short circuit of power supply through optocoupler

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] Such as figure 1 As shown in the figure, an automatic disconnection method to realize power disconnection and short circuit through optocoupler divides the mains into two routes, the first route is connected to the power supply output through the relay K, and the second route is connected to the rectifier and step-down circuit to obtain 12V DC power supply Relay K supplies power. In the second circuit, the 220V AC is rectified by half-wave to obtain a DC, which is input to the BUCK chip for step-down, and the output voltage is adjusted to 12V according to the ratio of R1 and R3.

[0017] In the first circuit, the relay K controls whether the relay is turned on through the transistor Q. The collector of the transistor Q is connected to 12V through the coil of the relay, and the coil of the relay is also connected in parallel wi...

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Abstract

The invention discloses a method for realizing short-circuit protection and open-circuit protection through an optical coupler for an electric energy meter, which is used for disconnecting power supply output when an output end is short-circuited or open-circuited. The circuit is divided into three parts: one part is a 12V step-down circuit for supplying power to the relay; one part is a power-on self-locking circuit; and one part is an open circuit and short circuit detection circuit and realizes automatic disconnection of the relay.

Description

technical field [0001] The invention relates to a method for realizing short-circuit and disconnection by using an optocoupler for an electric energy meter. Background technique [0002] In the product development stage, it is directly connected to the mains. During the debugging process, there may be a short circuit or an open circuit, which may cause the circuit breaker to be switched off. After the test, the power supply is directly unplugged. If the power supply is not turned off, there will also be safety hazards. In consideration of the safety of the operator, to protect the normal use of the mains power supply, a power supply protection circuit is designed. Contents of the invention [0003] In order to solve the hidden danger of power-on safety and consider the device cost, the present invention uses an optocoupler to realize automatic disconnection when the power supply is disconnected or short-circuited. [0004] The present invention is realized through the fol...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H3/087H02H1/00H02H9/04G01R31/40
CPCH02H3/087H02H1/0007H02H1/0069H02H9/04G01R31/40
Inventor 章恩友蒋卫平贺东章林峰寿寅生刘照飞王岩姚晓峰李海江李家佳吴齐胜刘伟江
Owner NINGBO JIANAN ELECTRONICS