KR960019375A - Earth leakage breaker with instantaneous overcurrent detection - Google Patents

Abstract

The present invention is more accurate to instantaneous and minute short circuit accidents by adding an overcurrent relay that operates by detecting instantaneous overcurrent to an earth leakage breaker used for the purpose of preventing a safety accident due to a short circuit or short circuit of electricity at home or industrial sites. And an earth leakage circuit breaker with instantaneous overcurrent detection to prevent large-scale safety accidents by prematurely eliminating accidents caused by short circuits. In this case, the amplifier detects and amplifies the induced current, and the power amplified by the amplifier is excited by the trip coil to cut off the main power, or the bimetal thermally deformed by the resistance of the short circuit current pushes the trip mechanism to cut off the main power supply. Short circuit current more than appropriate current Short circuit current detection means, amplification means for amplifying the short circuit current detected by the detection means with a predetermined power source, drive means triggered and driven by a signal amplified by the amplification means, and switching by the drive means. And an overcurrent relay comprising switching means for operation and current output means for outputting a current from the transformer by the switching means, or leakage current detecting means for detecting a leakage current of the main wiring; A first amplifying means for amplifying the induced current detected by the current detecting means to a predetermined power source, a short circuit current detecting means for detecting a short circuit current by being installed at any one of the main wirings, and detected by the short circuit current detecting means Second amplifying means for amplifying the induced current to a predetermined power source, and the first and second amplifying means Woman to the current amplification stage at the trip coil hayeoseo composed of the operating means for operating a switch, to the moment to sensitively detect the flow of more than a small current in accordance with the short-circuit or earth leakage circuit breaker is aimed to a such operation.

Description

Earth leakage breaker with instantaneous overcurrent detection

As this is a public information case, the full text was not included.

1 is a block diagram of an earth leakage circuit breaker having an instantaneous overcurrent detection function according to an embodiment of the present invention;

2 is a circuit diagram of an instantaneous overcurrent relay according to an embodiment of the present invention,

3 is a circuit diagram of an earth leakage breaker having an instantaneous overcurrent detection function according to another embodiment of the present invention.

Claims (5)

An image current transformer that detects and detects a leakage current flowing through the main power supply, an amplifier that detects and amplifies the induced current, and a power amplified by the amplifier is excited by a trip coil to cut off the main power supply, or a short circuit current resistance. The earth leakage circuit breaker configured to cut off the main power supply by pushing the trip mechanism by the tripping mechanism further includes an overcurrent relay that detects a short circuit current and outputs a predetermined current to the main power supply flowing through the image current transformer. An earth leakage breaker with instantaneous current detection. A leakage current detecting means for detecting a leakage current of the main wiring, a first amplifying means for amplifying the induced current detected by the leakage current detecting means with a predetermined power supply, and a short circuit current provided at one of the main wirings Tripping the short-circuit current detecting means for detecting, the second amplifying means for amplifying the induced current detected by the short-circuit current detecting means with a predetermined power supply, and the current amplified in the first and second amplifying means. An earth leakage circuit breaker having an instantaneous current detection function, comprising an operation means for exciting a coil to operate a switch. The overcurrent relay according to claim 1, wherein the overcurrent relay comprises: detecting means for detecting a load short circuit current, amplifying means for amplifying the short circuit current detected by the short circuit current detecting means with a predetermined power source, and amplified by the amplifying means. A driving means triggered by a signal and driven, a switching means for switching by said driving means, and a current output means for outputting a predetermined current from the transformer by said switching means. Earth leakage breaker with detection function. 4. The instantaneous current detection function according to claim 3, wherein the driving means includes a thyristors triggered by the output signal of the amplifying means and a relay which is excited by the thyristors to switch the output. Earth leakage breaker. 3. The apparatus of claim 2, further comprising: leakage current detecting means for detecting a leakage current of the main wiring, first amplifying means for amplifying a current induced by the leakage current detecting means with a predetermined power source; Short-circuit current detecting means for detecting a short-circuit current at any one place, second amplifying means for amplifying the induced current detected by the short-circuit current detecting means with a predetermined power source, the first amplifying means and the second amplifying means. And a thermal overcurrent detecting means for exciting the amplified current in the trip coil to operate the switch, and a thermal overcurrent detecting means for pushing the trip mechanism by thermal deformation of the bimetal with resistance of short circuit current. An earth leakage breaker with instantaneous overcurrent detection. ※ Note: The disclosure is based on the initial application.