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Circuit of miniature electric leakage circuit breaker

A leakage circuit breaker, power circuit technology, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve poor circuit reliability, safety and anti-lightning surge Low reliability and other issues, to achieve high reliability, reduce false tripping phenomenon, cost-effective effect

Inactive Publication Date: 2014-01-08
CNC ELECTRIC GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a small leakage circuit breaker circuit, which at least includes: circuit; leakage signal conditioning circuit; leakage detection control unit; circuit required for leakage detection control unit; leakage test circuit; tripping circuit

Method used

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  • Circuit of miniature electric leakage circuit breaker

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Embodiment Construction

[0018] see figure 1 , figure 1 It is a circuit schematic diagram of a small leakage circuit breaker adopting resistance step-down in the prior art, and adopts the form of resistance step-down. Its defect is that the minimum working voltage range is 50V, the highest is 440V, and the product volume is limited, which makes it impossible to use a high-power, large-value drop-down resistor, so that the temperature rise of the drop-down resistor is relatively high during normal operation, thereby reducing the entire circuit. The reliability of the work, and because only the voltage stabilization circuit inside the leakage detection control unit is used, the product has poor anti-burst interference and is prone to false tripping.

[0019] see figure 2 , figure 2 It is a circuit schematic diagram of a small leakage circuit breaker in the form of a single thyristor in the prior art. Its defect is: when the circuit breaker is energized, the AC voltage is rectified and directly app...

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Abstract

The invention relates to a circuit of a miniature electric leakage circuit breaker. The circuit of the miniature electric leakage circuit breaker comprises a power supply circuit, and is characterized by also comprising an electric leakage signal conditioning circuit, an electric leakage detection control unit, an electric leakage detection control unit required circuit, an electric leakage testing circuit and a tripping circuit, wherein the power supply circuit is connected with the electric leakage testing circuit, the electric leakage detection control unit and the tripping circuit; the electric leakage signal conditioning circuit is connected with the electric leakage detection control unit; the electric leakage detection control unit required circuit is connected with the electric leakage detection control unit. According to the circuit of the miniature electric leakage circuit breaker provided by the invention, the withstand voltage value of the tripping circuit is increased, the lightning surge resistance is improved, and moreover, the cost performance is high; the working temperature rise of the power supply circuit is reduced, the product reliability is improved, the pulse packet resistance of a product is improved, and the false tripping phenomenon of the product is reduced. The circuit of the miniature electric leakage circuit breaker is simple in design, strong in EMC (electromagnetic compatibility) resistance, high in reliability and low in cost, and more meets the actual demand of the miniature electric leakage circuit breaker.

Description

technical field [0001] The invention relates to the circuit field of circuit breakers, and more specifically relates to a small leakage circuit breaker circuit. Background technique [0002] At present, the power circuit of small leakage circuit breakers generally adopts the form of resistive step-down. Due to the regulations of the standard GB16917.1, the working voltage range is at least 50V, the highest is at 440V and the product volume is limited, which makes it impossible to use high-power, high-resistance circuit breakers. Drop-down resistor, so that the temperature rise of the drop-down resistor is relatively high during normal operation, thereby reducing the reliability of the entire circuit. At the same time, because only the voltage stabilization circuit inside the leakage detection control unit is used, the product's ability to resist burst interference is poor. The phenomenon of false tripping occurs; and the tripping circuit generally adopts the form of a single...

Claims

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Application Information

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IPC IPC(8): H02H3/32H02H9/04
Inventor 余存泰赵东杰彭昆明黎永胜李其利杨晓红
Owner CNC ELECTRIC GRP
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