Unlock instant, AI-driven research and patent intelligence for your innovation.

Electric leakage breaker

A leakage circuit breaker and circuit technology, applied in the direction of circuit devices, emergency protection circuit devices, electrical components, etc., can solve problems such as loss of leakage function

Active Publication Date: 2010-08-18
MITSUBISHI ELECTRIC CORP
View PDF2 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, when the voltage is obtained from the R-T phase as mentioned above, there will be no problem when the S phase loses the phase, but when the R phase or the T phase loses the phase, the leakage function will be lost immediately.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric leakage breaker
  • Electric leakage breaker
  • Electric leakage breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0021] FIG. 1 is an internal connection diagram of a three-pole earth leakage circuit breaker according to Embodiment 1 of the present invention, and FIG. 2 is a diagram showing an output voltage waveform of the rectifier circuit in FIG. 1 . In addition, FIG. 3 is a detailed diagram of the power supply circuit in FIG. 1 .

[0022] In FIG. 1, a three-pole earth leakage circuit breaker (hereinafter, referred to as an earth leakage circuit breaker) 71 is provided with a power supply side terminal 61 on the power supply side of the installed circuit and a load side terminal 62 on the load side. The power lines 63 to which the terminals are connected pass through the circuit contacts 64 for switching on and off the current flowing through the power lines 63, and three sets are respectively provided. Note that, for the sake of convenience, the power lines 63 are denoted by R, S, and T symbols from the upper side to the lower side in the figure. When the power line 63 is inserted in...

Embodiment approach 2

[0034] FIG. 4 is a diagram corresponding to FIG. 3 including a thyristor in Embodiment 2 of the present invention. The difference from FIG. 3 is that the thyristor and the field effect transistor are divided into two stages. Not limited to thyristors and field effect transistors, these elements have an external shape corresponding to a circuit built in an earth leakage circuit breaker, and the usable voltage can naturally be determined from the external shape. That is, when the circuit voltage is high, it is preferable to use the power supply circuit described in this Embodiment 2 (Embodiment 1 is for a circuit voltage of AC100-200V series, and Embodiment 2 is for a circuit voltage of AC100-400V series). In addition, since there is no great difference in the process of generating the DC voltage to the leakage detection circuit 1, here, for the purpose of improving the withstand voltage performance, the average application method of the main circuit voltage corresponding to the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention provides a small leakage circuit breaker which obtains working electricity from each phase of three-phase circuit, and which can be inversed connected without adding switch member for switching the working electricity supply. The leakage circuit breaker includes: zero sequence converter in which three electricity wires are inserted and which detects leakage current of the three-phase circuit; leakage current detecting circuit for level determination of signal detected by the zero sequence converter; electromagnet device which follows with output of the leakage current detecting circuit and actuates open-close mechanism; and circuit contact point which is cut off by the action of the open-close mechanism, and the leakage current detecting circuit and the electromagnet device is powered from the three electricity wires via rectifier circuit, and at the same time, the rectifier circuit is a half-wave rectifier, and the electromagnet device is connected to back section of the half-wave rectifier.

Description

technical field [0001] The present invention relates to an earth leakage circuit breaker which cuts off a circuit when the leakage current of the circuit is greater than or equal to a predetermined value, and more specifically, to a technique for improving the generation of a power supply voltage as a driving source of this function. Background technique [0002] At present, almost all commercially available earth leakage circuit breakers adopt a method in which the level of the signal detected by the zero-sequence converter is carried out in an earth leakage detection circuit built in the earth leakage circuit breaker, for example, constituted by an integrated circuit. It is judged that if it exceeds a predetermined value, a drive signal is outputted to an electromagnet device also built into the earth leakage breaker to open the circuit. However, these earth leakage detection circuits and electromagnet devices require operating power, which is obtained from the inside of t...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): H01H83/02H01H83/14H02H3/347
CPCH02H1/066H02H3/347
Inventor 三好伸郎
Owner MITSUBISHI ELECTRIC CORP