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Circuit breaker

A technology of circuit breakers and zero-sequence converters, applied in circuits, transformers, inductors, etc., can solve problems such as insulation degradation, achieve the effect of suppressing winding-in and reducing the number of components

Pending Publication Date: 2021-11-30
MITSUBISHI ELECTRIC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, the insulation between phases deteriorates

Method used

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  • Circuit breaker
  • Circuit breaker
  • Circuit breaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment approach 1

[0019] figure 1 It is an example of a schematic diagram showing the appearance of the circuit breaker 100a according to this embodiment. Such as figure 1 As shown, the circuit breaker 100a according to Embodiment 1 covers the outside with the cover 2 formed of an insulating material. The location where the earth leakage tripping device 4 , the power supply side terminal 6 a , and the load side terminal 6 b are present is shown in a plurality of holes provided in the cover 2 . The circuit breaker 100a according to this embodiment is, for example, an earth leakage circuit breaker.

[0020] figure 2 The left half of is a figure which shows the internal structure of the circuit breaker 100a in the state which removed the cover 2 of the circuit breaker 100a concerning this embodiment. figure 2 The right half of is an external view of the circuit breaker 100a according to this embodiment, and the lower part shows an internal structure seen through from the external appearance....

Embodiment approach 2

[0066] The difference between Embodiment 1 and Embodiment 2 is the difference in the shape of the stopper. In Embodiment 1, the blocking portion is composed of a main body, a support portion, a connection portion, and a relaxation portion, but in Embodiment 2, it is composed of a main body, a support portion, a connection portion, a relaxation portion, and a facing portion.

[0067] In addition, below, only the difference of Embodiment 1 is demonstrated, and the description about the same or corresponding part is abbreviate|omitted. Regarding the reference numerals, the same reference numerals are assigned to the same or corresponding parts as those in Embodiment 1, and description thereof will be omitted.

[0068] Figure 8 It is an example of a figure of the stopper part 11b which the circuit breaker 100b which concerns on this embodiment has.

[0069] The stopper part 11b is comprised from the main-body part 14b, the support part 13b, the connection part 15b, the relaxati...

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PUM

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Abstract

A circuit breaker (100a) according to the present invention is provided with: a blocking part (11a) provided so as to cover at least a part of a zero-sequence converter (9); and a frame body configured from a base (1) that houses the zero-sequence current transformer (9) and the blocking part (11a), and a cover (2) that covers the base (1). The blocking part (11a) has: a main body part (14a) that is provided between the zero-sequence current transformer (9) and the load-side terminal (6b); a connection section (15a) that continuously covers at least a part of the cover (2)-side surface of the zero-sequence current transformer (9) from one end of the main body section (14a); and a relaxation section (12a) that is provided to the connection section (15a) and that is bent so as to fill a gap between the cover (2) and the zero-sequence converter (9).

Description

technical field [0001] The present invention relates to a circuit breaker having a blocking portion arranged to cover a zero-sequence converter. Background technique [0002] In a circuit breaker having a plurality of phases, arc gas is generated near the opening and closing contacts after the circuit is broken, and conductive spatter contained in the arc gas adheres to insulating walls and the like across a range between phases. As a result, the insulation between phases deteriorates. [0003] Therefore, in the conventional circuit breaker, between the circuit breaking mechanism part and the abnormal current detection element, an electric leakage detection module having a door-shaped case for accommodating the zero-sequence converter is provided as a shielding wall, thereby Adhesion of arc gas to the abnormal current detection element is suppressed (for example, refer to Patent Document 1). [0004] Patent Document 1: Japanese Patent Laying-Open No. 6-012966 [0005] How...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H71/02H01H71/04H01H71/08H01H83/14
CPCH01H71/0207H01H71/04H01H71/08H01H83/14H01H2071/044H01H71/0214H01F38/30H01H83/02
Inventor 永野义隆滨田哲也铃木诚
Owner MITSUBISHI ELECTRIC CORP
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