Low-power leakage protection plug

A technology of leakage protection plug and low power consumption, which is applied in the direction of circuits, electrical components, coupling devices, etc., can solve the problems of amplifying circuit supply, large power consumption of the leakage protection plug, and large power consumption, so as to ensure the safety of electricity use Effect

Active Publication Date: 2018-03-02
佛山良辉电子有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, the current-limiting resistors that provide working power for the amplifying circuit usually choose a smaller resistance value to ensure that the leakage protection plug can still work normally when the power supply voltage drops to a lower voltage (such as 50V), but this will result in a fault at 220V. When in use, due to the small resistance value of the current limiting resistor, the power consumption is large, which leads to the problem that the power consumption of the leakage protection plug is very large.
If the current limiting resistor is selected with a larger resistance value, although the leakage protection plug consumes less power at 220V, it will not be able to provide the necessary operating voltage and current for the amplifier circuit when the power supply voltage drops to a lower voltage. As a result, the leakage protection plug cannot continue to provide safety protection in a lower supply voltage environment

Method used

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  • Low-power leakage protection plug

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Embodiment 1

[0013] see figure 1 As shown, a low-power leakage protection plug includes a shell, a phase pole copper pin 1, a zero pole copper pin 2, a phase line 11, a neutral line 12, and a zero-sequence current passing through both the phase line 11 and the neutral line 12. Transformer 6, test circuit 8 and electromagnetic tripping and locking device, the electromagnetic tripping and locking device includes electromagnetic coil 3 and its drive circuit, phase line static contact 1-1 and phase line moving contact 1- 2. The neutral line static contact 2-1 and the neutral line moving contact 2-2, the driving circuit of the electromagnetic coil 3 is mainly composed of a rectifier circuit 4, a first thyristor 5, an amplifier circuit 7, and a first resistor 9 , the secondary winding output end of the zero-sequence current transformer 6 is connected to the input end of the amplifying circuit 7, one end of the first resistor 9 is connected to the positive output end of the rectifier circuit 4, a...

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PUM

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Abstract

A low-power leakage protection plug comprises a zero sequence current transformer and an electromagnetic tripping and locking device. The device is provided with an electromagnetic coil, and a rectifier circuit, a first silicon controlled rectifier, an amplifier circuit and a first resistor in the drive circuit of the electromagnetic coil. The device is further provided with a power control circuit. The power control circuit and the first resistor are connected in parallel between the positive end of the output of the rectifier circuit and the power end of the amplifier circuit. The low-powerleakage protection plug not only consumes less power under normal mains voltage, but also can continue working at low power even if the mains voltage drops to a very low level. Therefore, the leakageprotection requirement of users in a power supply environment with a wide range of voltage is better satisfied.

Description

technical field [0001] The invention relates to the technical field of electricity safety protection, in particular to a low-power leakage protection plug. Background technique [0002] With the improvement of people's living standards in today's world, people's awareness and requirements for energy saving and low carbon are also increasing. In the existing leakage protection plug, a step-down current limiting resistor is usually set between the power supply end of the amplifying circuit and the output end of the rectification circuit, so that the control circuit of the leakage protection plug obtains AC 220V power from the mains and rectifies it through the rectification circuit. Finally, the DC voltage is output, and the voltage is reduced and the current is limited by the step-down current-limiting resistor to provide a low-voltage DC working power supply for the amplifying circuit. At the same time, according to the requirements of relevant national standards, when the ...

Claims

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Application Information

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Patent Type & AuthorityApplications(China)
IPC IPC(8): H01R13/66
CPCH01R13/665
Inventor谭文兴冯建芳史泽华
Owner佛山良辉电子有限公司