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Leakage protector and detection method of leakage protection function

A leakage protector and leakage protection technology, which is applied to emergency protection circuit devices, emergency protection devices with automatic disconnection, instruments, etc., can solve problems such as losses, avoid risks and losses, and ensure the effects of leakage protection performance

Active Publication Date: 2019-03-29
SCHNEIDER ELECTRIC IND SAS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the leakage protector fails, when the electric shock current or the phase-to-ground leakage current occurs, huge losses will occur

Method used

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  • Leakage protector and detection method of leakage protection function
  • Leakage protector and detection method of leakage protection function
  • Leakage protector and detection method of leakage protection function

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Embodiment Construction

[0016] The following description with reference to the accompanying drawings is provided to assist in a comprehensive understanding of exemplary embodiments of the present invention as defined by the claims and their equivalents. It includes various details to facilitate understanding but they should be regarded as exemplary only. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the invention. Also, descriptions of well-known functions and constructions are omitted for clarity and conciseness.

[0017] like figure 1 As shown, a schematic diagram of a leakage protector in the prior art is shown. The leakage protector mainly includes: a zero-sequence current transformer (ZCT) 10, a leakage current processing module 20, a control module 30, a circuit breaker module 40, and leakage simulation module 50 .

[0018] ZCT10 measures the ...

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Abstract

A leakage protector and a leakage protection function detection method are provided. The leakage protection function detection method includes: when the leakage protector is set to the automatic detection state, periodically judging whether the current timing time reaches the predetermined time length; when judging that the current timing time reaches the predetermined time length, the leakage protector Automatically simulate and generate leakage current in the power grid, measure the leakage current in the power grid, and determine whether the leakage current is greater than the predetermined leakage current threshold, and simulate and generate leakage current in the power grid and determine that the leakage current in the power grid is not greater than the predetermined leakage current threshold. In the case of leakage protection function fault signal output or output circuit breaker breaking control signal. As a result, the leakage protector can be regularly tested without manual operation, thereby ensuring the leakage protection performance of the leakage protector and effectively avoiding various risks and losses caused by the failure of the leakage protector.

Description

technical field [0001] The invention relates to the field of leakage protection, and in particular to a leakage protector and a method for detecting the leakage protection function. Background technique [0002] Leakage protector is a kind of safety electrical appliance, which detects the magnitude of the phase-to-ground leakage current or electric shock current inside the protected grid, sends out a circuit breaker breaking control signal and completes the breaking of the circuit breaker to disconnect the grid power supply. [0003] As a kind of safety electrical appliance, the requirements for the quality and performance of leakage protectors are very strict. After the leakage protector is installed, the test button should be operated to detect the working characteristics of the leakage protector, and it is allowed to be put into use after confirming that it can operate normally. Moreover, its reliability should be tested regularly through the test button during use, and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00H02H3/32
Inventor 孙海涛吴蔚
Owner SCHNEIDER ELECTRIC IND SAS
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