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Electric leakage protection monitoring device and detection method thereof

A monitoring device and leakage protection technology, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., can solve the problems of poor error tolerance of interference signals, false actions of alarm systems, etc., and achieve the effect of reducing false actions and suppressing interference

Active Publication Date: 2018-05-01
HEBEI AGRICULTURAL UNIV.
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this detection device has poor fault tolerance for the interference signal in the circuit itself, which often leads to malfunction of the alarm system.

Method used

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  • Electric leakage protection monitoring device and detection method thereof
  • Electric leakage protection monitoring device and detection method thereof
  • Electric leakage protection monitoring device and detection method thereof

Examples

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Embodiment Construction

[0021] refer to Figure 1-2 , a specific embodiment of the present invention includes,

[0022] The current transformer 1 is used to detect the leakage current on the line;

[0023] Filtering circuit 2, for filtering the detected leakage current signal;

[0024] The central processing unit 3 is used for analyzing the leakage current signal and judging whether there is leakage.

[0025] The input terminal IN of the filter circuit is connected to the inverting input terminal of the first operational amplifier A1 through the first resistor R1 and the second resistor R2 connected in series, and the non-inverting input terminal of the first operational amplifier A1 is grounded through the third resistor R3, The first resistor R1 and the second resistor R2 are grounded through the first capacitor C1, and the fourth resistor R4 and the fifth resistor R5 connected in series between the first resistor R1 and the second resistor R2 are connected to the output terminal of the first ope...

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PUM

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Abstract

The invention discloses an electric leakage protection monitoring device. The electric leakage protection monitoring device comprises a current transformer, a filter circuit and a central processing unit. The current transformer is used for detecting leakage current of a circuit; the filter circuit is used for filter treatment of detected leakage current signals; the central processing unit is used for analyzing the leakage current signals to judge whether electric leakage occurs or not. The electric leakage protection monitoring device has advantages that defects in the prior art can be improved, and detection accuracy of the monitoring device is improved.

Description

technical field [0001] The invention relates to the technical field of electrical protection, in particular to a leakage protection monitoring device and a detection method thereof. Background technique [0002] Leakage is a very serious fault during the operation of electrical equipment, which not only causes damage to the equipment, but more importantly, affects the safety of personnel. Chinese invention patent CN 104113042B discloses a leakage protection device and method, which uses a current transformer to detect leakage current signals to provide early warning of leakage hazards. However, this detection device has poor fault tolerance to the interference signal in the circuit itself, which often leads to malfunction of the alarm system. Contents of the invention [0003] The technical problem to be solved by the present invention is to provide a leakage protection monitoring device and a detection method thereof, which can solve the deficiencies of the prior art and...

Claims

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Application Information

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IPC IPC(8): G01R31/02
CPCG01R31/50
Inventor 邵利敏梁栋周玉宏张莉李东明
Owner HEBEI AGRICULTURAL UNIV.
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