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Leakage circuit breakers

A leakage circuit breaker and leakage current technology, which is applied in the direction of circuits, electrical components, and parts of protective switches, can solve problems such as inability to detect leakage, staggered terminal holes, and inability to combine, so as to achieve the effect of ensuring accuracy and easy assembly

Active Publication Date: 2017-01-18
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In the existing leakage circuit breaker, the terminal of the rod-shaped zero-sequence converter protruding from the housing plane of the zero-sequence converter in an exposed state is directly connected to the leakage detection unit. Therefore, if the zero-sequence converter If the terminals of the zero-sequence converter are deformed, the terminals of the zero-sequence converter and the terminal holes for connecting the leakage detection unit are staggered and cannot be combined
In addition, if the distance between the terminals of the zero-sequence converter is reduced for miniaturization, due to the adhesion of soot generated when the earth leakage circuit breaker is disconnected, the terminals of the zero-sequence converter will be in a short-circuit state, and normal operation may not be possible. The problem of leakage detection after disconnection

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0020] figure 1 It is an exploded perspective view showing the structure of the earth leakage circuit breaker in Embodiment 1 for implementing this invention. figure 2 yes means figure 1 The enlarged front view of the zero-sequence converter in Embodiment 1 shown, image 3 yes means figure 1 An enlarged cross-sectional view of the leakage detection unit in Embodiment 1 shown, Figure 4 It is an enlarged cross-sectional view showing a combination of a zero-sequence current transformer and a leakage detection unit.

[0021] exist figure 1 In , the shaded part is to clearly show the cross-sectional part of the structure. figure 2 It is a figure which shows the structure of the terminal part of a zero-sequence converter. image 3 It is a figure which shows the structure of the connection part of an electric-leakage detection means. Figure 4 is to use figure 2 shown in the terminal section of the zero-sequence converter and image 3 The connection part of the leakage d...

Embodiment approach 2

[0029] Figure 5 It is a figure which shows the structure of the zero-sequence current transformer and the earth-leakage detection means in the earth leakage circuit breaker in Embodiment 2 of this invention. As shown in the figure, it is composed of a fixing hole 2c provided on the terminal case 2e of the terminal part 2, and a protrusion 6a provided on the outer contour case 6 for accommodating the winding part of the zero-sequence converter 1. Combination by snap. The terminal housing 2e and the outer shell 6 are molded from synthetic resin. That is, using the elasticity of the part of the terminal housing 2e where the fixing hole 2c is formed, the fixing hole 2c is fitted and hooked on the projection 6a, thereby fixing the terminal housing 2e and the outer shell housing 6. . For other structures, due to the Figure 1 ~ Figure 4 The illustrated embodiment is the same, and thus description thereof is omitted.

[0030] According to this embodiment, the terminal 2a of the...

Embodiment approach 3

[0034] Figure 6 ~ Figure 7 It is a figure which shows the structure of the zero-sequence converter of the earth leakage circuit breaker in Embodiment 3 of this invention. Image 6 is an enlarged oblique view showing the assembly process of the zero-sequence converter, Figure 7 yes Image 6 The enlarged cross-sectional view of the zero-sequence converter shown, Figure 8 It is an enlarged perspective view showing the completion of assembly of the zero-sequence converter.

[0035] Such as Image 6 As shown, the terminal portion 2 of the zero-sequence converter 1 is configured to hold the flexible and insulating-coated winding lead 1a of the zero-sequence converter 1 by a holding portion 2b formed in a conical convex shape. In the state of the terminal 2a, the notch-shaped fixing hole 2c formed in the terminal part case 2e of the terminal part 2 is fitted and joined to the protrusion 6a of the outer shell case 6 by snapping.

[0036] The terminal part housing 2e of the termi...

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PUM

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Abstract

The utility model relates to an electric leakage breaker which can permit the deformation of the terminals of a zero sequence current transformer when the terminals of the electric leakage breaker are connected with an electric leakage detection unit, and can restrain the short circuit among the terminals of the zero sequence current transformer caused by the cigarette ash attachment at the short circuit. Receiving parts (4b) are arranged in a shell (4) of the electric leakage detection unit (3) of the electric leakage breaker (101) and form the guiding shapes for guiding the terminals (2a) of the zero sequence current transformer (1), and keeping parts (2b) are arranged in the terminal parts (2) of the zero sequence current transformer and match the guiding shapes formed by the receiving parts (4b) of the shell (4).

Description

technical field [0001] The present invention relates to a leakage circuit breaker, which disconnects the circuit when leakage or short circuit occurs in an AC circuit, and in particular relates to a connection structure between terminals of a zero-sequence converter for leakage detection and a leakage detection unit. Background technique [0002] The existing leakage circuit breaker adopts a structure in which the terminals of the zero-sequence converter used for leakage detection protrude from the housing plane of the zero-sequence converter in a rod shape. In addition, the terminals of the zero-sequence converter are directly It is inserted into a connection terminal hole of a printed board, and connected to a printed board case housing a leakage detection printed board (for example, refer to Patent Document 1). [0003] Patent Document 1: Japanese Unexamined Patent Publication No. 2000-149757 ( figure 1 ) [0004] In the existing leakage circuit breaker, the terminal of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/08
CPCH01H71/0214H01H71/08
Inventor 塚本龙幸
Owner MITSUBISHI ELECTRIC CORP