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Leakage circuit breakers

A leakage circuit breaker and power line technology, applied in the field of installation structure of zero-sequence converter assembly unit, can solve the problems of poor operability, obstruction of screwdriver adjustment screw insertion, damage, etc., and achieve the effect of improving operability

Active Publication Date: 2017-08-15
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, in the earth leakage circuit breaker as shown in Patent Document 1, if the leakage detection unit is not fixed to the base of the circuit breaker, it is difficult to install the power line arranged through the zero-sequence converter to the base. The resulting bending or twisting causes the zero-sequence converter to warp toward the housing side. As a result, when adjusting the tripping characteristics of the tripping device by rotating the adjusting screw of the bimetal, the shape of the outer periphery of the zero-sequence converter The insertion of a screwdriver etc. into the central bimetal adjustment screw is hindered, resulting in poor operability
[0005] In addition, when the leakage detection unit is attached to the base, there is a problem that the power line on the load side of the zero-sequence converter may bulge, and the insulating tube of the shunt conductor may rub against the corner of the base and be damaged.

Method used

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Experimental program
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Embodiment approach 1

[0030] First, use Figure 1 to Figure 7 The overall structure of the earth leakage circuit breaker constructed by applying the present invention will be described.

[0031] figure 1 It is a perspective view showing the appearance of an earth leakage circuit breaker constructed by applying the present invention, figure 2 yes means figure 1 A top view of the appearance of the earth leakage circuit breaker in, image 3 is true figure 1 The oblique view showing the appearance of the earth leakage circuit breaker with the cover separated, Figure 4 is along figure 2 The cross-sectional view of the main part of the X-X line in Figure 5 is along figure 2 The sectional view of the main part of the Y-Y line in Image 6 It is a plan view showing main parts of the earth leakage circuit breaker with the cover removed, Figure 7 yes means Image 6 An oblique view of the appearance of the earth leakage circuit breaker.

[0032] In each figure, the earth leakage circuit breake...

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Abstract

The invention is to improve the operability of adjustment for the trip characteristics of a tripping device. An earth leakage circuit breaker comprises a zero sequence converter body (11) into which an electric wire (20) is inserted; a frame body (12) supporting the zero sequence converter body; and a frame (14) installed to the frame body for supporting the zero sequence converter body. The frame (14) comprises a pair of side walls (14a) combined with the frame body, a support body (14b) connected to the pair of side walls, clamping portions (14e) protruding from the lower portion of the side walls and clamped to a base, and abutting portions (14f) protruding from the side walls toward the opposite sides of the clamping portions and abutting on the base.

Description

technical field [0001] The invention relates to a leakage circuit breaker, which disconnects the circuit when leakage or grounding short circuit occurs in an AC circuit, in particular to an installation structure of a zero-sequence converter assembly unit for leakage detection. Background technique [0002] As a conventional earth leakage circuit breaker, the following components are accommodated in a housing composed of a base and a cover, namely: a plurality of power supply-side terminals and a plurality of load-side terminals; The circuit is disconnected by rotation; the zero-sequence converter detects the leakage or ground short circuit in the circuit; and the leakage detection unit uses the output of the zero-sequence converter to drive the tripping device. (For example, refer to Patent Document 1) [0003] Patent Document 1: Japanese Patent No. 4910913 [0004] However, in the earth leakage circuit breaker as shown in Patent Document 1, if the leakage detection unit ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H83/14H01H71/00
CPCH01H71/0214H01H71/08
Inventor 塚本龙幸
Owner MITSUBISHI ELECTRIC CORP