Low-voltage power grid protection device

A technology for protection devices and low-voltage power grids, applied in circuit devices, emergency protection circuit devices, emergency protection circuit devices for limiting overcurrent/overvoltage, etc., can solve problems such as insufficient technical design and failure to achieve technical effects, etc. Achieve high safety, reliable performance, and reduce leakage loss

Inactive Publication Date: 2012-03-07
XINYANG POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the existing low-voltage power supply lines, various types of electrical safety operation equipment such as leakage switches and action protection devices are generally installed. However, in actual operation, due to the lack of technical design of these equipment, the expected technical effect cannot be achieved.

Method used

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Embodiment Construction

[0008] The technical solutions of the present invention will be described in further detail below through specific implementation methods.

[0009] Such as figure 1 As shown, a low-voltage power grid protection device includes an inductance coil L, a piezoresistor R, a capacitor C1, a capacitor C2, and an adjustable capacitor C3; wherein, the piezoresistor R, the capacitor C1, and the capacitor C2 and the two ends of the adjustable capacitor C3 are respectively connected to the two ends of the inductance coil L; the inductance of the inductance coil L is 130H; the resistance value of the piezoresistor R is 12 kilohms. The varistor R of the sensitive resistor R can be eliminated when an abnormal overvoltage is generated in the low-voltage power supply line, and the overvoltage is introduced into the earth; the capacitance of the capacitor C1 is 100nF, and the capacitance of the capacitor C2 is 80nF. By adjusting the adjustable capacitor C3, the resonant frequency of the low-vo...

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PUM

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Abstract

The invention provides a low-voltage power grid protection device, which comprises an inductance coil L, a piezoresistor R, a capacitor C1, a capacitor C2 and an adjustable capacitor C3, wherein two ends of the piezoresistor R, the capacitor C1, the capacitor C2 and the adjustable capacitor C3 are respectively connected with two ends of the inductance coil L, the inductance of the inductance coil L is 125H-145H, the resistance of the piezoresistor R is 8-12 kilo-ohm, the capacitance of the capacitor C1 is 50-110nf, the capacitance of the capacitor C2 is 60-150nF, and the two ends of the inductance coil L are taken as two external connection ends of the low-voltage power grid protection device. The low-voltage power gird protection device has the advantages of simple circuit structure, easiness in implementation, low cost, reliable performance, high safety and strong practicability.

Description

technical field [0001] The invention relates to an electric power safe operation equipment, in particular to a low-voltage power grid protection device. Background technique [0002] In the existing low-voltage power supply lines, various types of electrical safety operation equipment such as leakage switches and action protection devices are generally installed. However, in actual operation, due to the lack of technical design of these equipment, the expected technical effect cannot be achieved. . [0003] In order to effectively prevent personal electric shock casualties, avoid electrical fire accidents caused by phase line metal short-circuit ground faults, and ensure the stability of low-voltage power supply lines, people have been looking for an ideal technical solution. Contents of the invention [0004] The purpose of the present invention is to overcome the shortcomings of the prior art, thereby providing a low-voltage power grid protection device with simple circ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02H9/04
Inventor 易瑾
Owner XINYANG POWER SUPPLY OF HENAN ELECTRIC POWER CORP
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