Earth leakage circuit breaker capable of outputting type of leakage current and method of controlling the same

Patent metadata

Field	Value
Publication number	US-11293994-B2
Application number	US-201916574811-A
Country	US
Kind code	B2
Filing date	Sep 18, 2019
Priority date	Jan 7, 2019
Publication date	Apr 5, 2022
Grant date	Apr 5, 2022

Abstract

An earth leakage circuit breaker and a method of controlling the same are disclosed. An earth leakage circuit breaker according to the present disclosure can detect a type of leakage current and output the type of the leakage current in various forms such that a user can recognize the type of the leakage current. Therefore, the user can easily recognize whether or not the leakage current has occurred and the type of the leakage current. This may facilitate the user to recognize the cause of the leakage and take an effective measure for preventing an accident.

First claim

What is claimed is:

1. An earth leakage circuit breaker, comprising:
a zero current transformer (ZCT) to detect leakage current information related to a leakage current;
a leakage current controller electrically connected to the zero current transformer, the leakage current controller to calculate leakage current type information using the leakage current information detected by the zero current transformer; and
an output device electrically connected to the leakage current controller, the output device to output the leakage current type information calculated by the leakage current controller,
wherein the leakage current controller includes a type information calculating unit that calculates type information related to the leakage current by using the received leakage current information,
wherein the received leakage current information includes AC current information, DC current information, and combined current information,
wherein the output device comprises an auditory information calculating unit to calculate three types of the leakage current type information in a form of different auditory information for each of the three types, and
wherein the output device comprises an auditory information output unit to output the calculated different auditory information corresponding to the three types of the leakage current type information.

2. The earth leakage circuit breaker of claim 1 , wherein the output device comprises a visual information calculating unit to calculate the calculated leakage current type information in a form of visual information.

3. The earth leakage circuit breaker of claim 2 , wherein the output device comprises a visual information output unit to output the calculated visual information.

4. The earth leakage circuit breaker of claim 1 , wherein the output device comprises a communication unit to transmit the calculated leakage current type information to outside.

5. A method for controlling an earth leakage circuit breaker, the method comprising:
(a) detecting, by a zero current transformer, leakage current information;
(b) calculating, by a leakage current calculation module, leakage current type information using the leakage current information; and
(c) outputting, by an output module, the calculated leakage current type information,
(d1) calculating, by an auditory information calculating unit, the calculated leakage current type information in a form of auditory information; and
(d2) outputting, by an auditory information output unit, the calculated auditory information,
wherein the leakage current type information calculated by the auditory information calculating unit includes AC current information, DC current information, and combined current information,
wherein the auditory information output unit is configured to output the auditory information in a form of different auditory information for each of three types of the leakage current type information.

6. The method of claim 5 , further comprising:
(c1) calculating, by a visual information calculating unit, the calculated leakage current type information in a form of visual information; and
(c2) outputting, by a visual information output unit, the calculated visual information.

7. The method of claim 5 , further comprising:
(e) transmitting, by a communication unit, the leakage current type information to an external device.

Assignees

• Lsis Co Ltd

Inventors

• Nam Sunggyu
• Lim Jongung

Classifications

• H01H71/04

  Means for indicating condition of the switching device {(by means of an auxiliary contact H01H71/46)} · CPC title

• G01R31/52

  Testing for short-circuits, leakage current or ground faults · CPC title

• H01H83/02

  operated by earth fault currents (H01H83/14 takes precedence) · CPC title

• H02H3/33 Primary

  using summation current transformers (H02H3/347 takes precedence) · CPC title

• H01H83/04 Primary

  with testing means for indicating the ability of the switch or relay to function properly · CPC title