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Thermal element structure of circuit breaker trip unit

A technology of thermal elements and circuit breakers, which is applied in the field of thermal element structures of circuit breaker releases, achieves good revisability, prevents waste of resources, and reflects economy.

Active Publication Date: 2018-03-27
CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can be seen from the content of the patent specification that since the movable part, the bimetallic sheet and the body of the heating element form a hinged assembly relationship with each other, from an engineering point of view, there are jamming and movable parts between the movable part and the bimetallic sheet. The risk of jamming between the component and the body of the thermal element

Method used

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  • Thermal element structure of circuit breaker trip unit
  • Thermal element structure of circuit breaker trip unit
  • Thermal element structure of circuit breaker trip unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] See image 3 , shows a heat element body 1 that generates heat when a current flows through it and a bimetal strip 2 (also called a bimetal element, the same below) for detecting heat. The geometric shape of the heat element body 1 is generally Z-shaped (also called "Zigzag"). Part, that is to say, the middle region in the height direction of the heating element body 1 constitutes the heating portion 12 of the heating element body. The root portion 21 of the aforementioned bimetallic strip 2 is connected to the root portion 121 of the heating portion 12 of the heating element body in a contacting manner.

[0031] As the technical points of the technical solution provided by the present invention: in this embodiment, the method of contacting the root 21 of the bimetal 2 of the aforementioned bimetal 2 with the root 121 of the heating part 121 of the heating part 12 of the aforementioned thermal element body In order to insert and connect the socket and the pin in the e...

Embodiment 2

[0036] See Figure 4 On the heating part root 121 of the heat generating part 12 of the heat element body and towards the side of the bimetal root 21, a half-enclosed pin cavity 1212 is formed, and the bimetal root 21 is mated with the half-enclosed pin cavity 1212. Depend on Figure 4 As shown, the shape of the pin cavity 1212 semi-enclosed is C-shaped, and is composed of two wings protruding from both sides of the heating part 12 of the heating element body and bending toward each other (by sheet metal working forming method). The rest are as described in Example 1.

Embodiment 3

[0038] See Figure 5 and Figure 6 On both sides of the bimetal root 21 of the aforementioned bimetal 2 and at positions corresponding to each other, a fixed seat insertion flange 211 is respectively extended, and a fixed seat is respectively provided at a position corresponding to the fixed seat insertion flange 211. Seat 4, the fixed seat 4 is positioned in the circuit breaker base of the circuit breaker in the use state, on the fixed seat 4 and at the position corresponding to the fixed seat inserting flange 211, there is an insertion groove 41, bimetallic The blade root 21 is fixed to the fixing seat 4 through the fixing seat inserting flange 211 in a state of being in contact with the heating part root 121 of the heating part 12 of the heating element body. The rest are as described in Example 1.

[0039] Depend on Figure 6 As shown, a distance is maintained between the aforementioned bimetal strip 2 and the heating portion 12 of the heating element body, and the gap ...

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Abstract

The invention discloses a heat element structure of a releaser of a circuit breaker, and belongs to the technical field of molded case circuit breakers. The heat element structure comprises a heat element body and a bimetal sheet. Heat can be generated by the heat element body when currents flow through the heat element body, and can be detected by the bimetal sheet, the heat element body comprises a heat element body heat emitting portion, and a bimetal sheet root of the bimetal sheet is in contact with a heat emitting portion root of the heat element body heat emitting portion. The heat element structure is characterized in that the bimetal sheet root of the bimetal sheet is in contact with the heat emitting portion root of the heat element body heat emitting portion in an insertion manner. The heat element structure has the advantages that the problem of influence on action characteristics of existing bimetal sheets due to mechanical connection modes including welding, riveting and threaded connection in the prior art can be solved; the assembly quality can be guaranteed, and scrapping loss due to the fact that assembly errors out of allowance ranges and incapability of reassembly can be prevented; requirements on flexible selectivity in actual production procedures can be met; resource wastage can be prevented, and the heat element structure is economically efficient; the heat element structure is favorable for improving the assembly consistency and increasing the characteristic detection qualification rate.

Description

technical field [0001] The invention belongs to the technical field of molded case circuit breakers, and in particular relates to a thermal element structure of a circuit breaker trip unit. Background technique [0002] As known in the industry, a circuit breaker is a switching device that can not only close, carry and break the current under normal circuit conditions, but also close, carry and break the current under abnormal circuit conditions within a specified time. The main function of the release is to trigger the tripping device within a specified period of time after the overload current exceeds the rated current range of the circuit breaker to automatically cut off the fault circuit, so as to avoid damage to power lines and related equipment or even cause fire hazards. [0003] In the structural system of the thermal element of the circuit breaker trip unit, the application of bimetal is more typical, because it can use its inherent thermal bending (also called "def...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H71/16
CPCH01H71/164
Inventor 王炯华唐维春顾建青
Owner CHANGSHU SWITCHGEAR MFG CO LTD (FORMER CHANGSHU SWITCHGEAR PLANT)
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