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Lightning preventing type residual-current circuit breaker

A leakage circuit breaker and circuit breaker technology, applied in circuit devices, emergency protection circuit devices, electrical components, etc., can solve the problems of high cost, easy damage, inconvenient use, etc., and achieve low cost, small operating current, and inrush current. small effect

Inactive Publication Date: 2015-05-06
广西荔浦深蓝电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this case, the varistor RV cannot withstand such a large current and is easily damaged. It is often damaged after a lightning strike. Because a component is damaged, it needs to be replaced or installed with a new lightning protection leakage circuit breaker. Therefore, the cost is high, installation and use are inconvenient

Method used

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  • Lightning preventing type residual-current circuit breaker
  • Lightning preventing type residual-current circuit breaker

Examples

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Embodiment

[0015] refer to figure 2 , a lightning protection leakage circuit breaker, comprising a leakage circuit breaker and a piezoresistor RV, the piezoresistor RV is connected in parallel with the neutral wire 1 and the live wire 2 in the circuit breaker, and one end of the piezoresistor RV is connected to the circuit breaker The load RL end, and the other end is connected to the input end of the transformer 3 in the circuit breaker.

[0016] One end of the varistor RV is connected to the neutral line 1 at the load RL end, and the other end is connected to the live line 2 at the input end of the transformer 3 .

[0017] When the surge voltage arrives, the varistor RV is turned on, so that the magnetic field generated by the neutral line 1 and the live line 2 is no longer balanced, and a current is generated in the transformer 3, which is amplified by the amplifier 4 to make the release 5 operate and the circuit breaker At the same time, the varistor RV also plays a role in limitin...

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Abstract

The invention discloses a lightning preventing type residual-current circuit breaker. The lightning preventing type residual-current circuit breaker comprises a residual-current circuit breaker and a pressure sensitive resistor and is characterized in that the pressure sensitive resistor is connected in parallel with a null wire and a live wire of the residual-current circuit breaker; one end of the pressure sensitive resistor is connected to the load end of the residual-current circuit breaker, and while the other end of the pressure sensitive resistor is connected to the input end of a mutual inductor in the residual-current circuit breaker; one end of the pressure sensitive resistor is connected with the mull wire at the load end, and while the other end of the pressure sensitive is connected with the live wire at the input end of the mutual inductor. Compared with the prior art, the lightning preventing type residual-current circuit breaker has the advantages that the action current is small, current of tens mA is needed, and meanwhile, the impact current on a pressure sensitive resistor body is relatively small, so that the safety of the pressure sensitive resistor at work is ensured, and as a result, the safety and durability are improved; the lightning preventing type residual-current circuit breaker has the advantages of being low in cost, and convenient to mount and use.

Description

technical field [0001] The invention relates to the technical field of low-voltage leakage circuit breakers, in particular to a lightning protection type leakage circuit breaker. Background technique [0002] Under normal circumstances, the leakage circuit breaker, the magnetic field generated by the live wire and the neutral wire is equal in size and opposite in direction, which just cancels out, no current will be generated in the amplifier, and the electromagnetic tripper will not move. When leakage occurs, because the current in the two lines is no longer balanced, the magnetic field is no longer offset, and a current is generated in the coil of the current transformer, which is amplified by the amplifier to make the electromagnet of the electromagnetic tripper pull in and release the lock of the switch. , The switch trips under the action of the spring and cuts off the power supply. [0003] Existing lightning protection leakage circuit breakers, such as figure 1 As s...

Claims

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Application Information

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IPC IPC(8): H02H3/32
Inventor 陈定吉冯喜军伍小鹏
Owner 广西荔浦深蓝电子有限公司
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