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Composite contact with high fusion welding resistance for residual current protective breaker

A compound contact and residual current technology, which is applied in the direction of circuit breaker contacts, circuit breaker components, circuits, etc., can solve the problems of low material utilization, complex production process, and high price

Inactive Publication Date: 2017-05-31
沈阳新同正复合材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the production process of this contact material is complicated and the material utilization rate is low, so the price is very high

Method used

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  • Composite contact with high fusion welding resistance for residual current protective breaker

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] See figure 1 , the composite contact is composed of a silver alloy contact layer 1 and a copper alloy contact layer 2; the silver alloy contact layer 1 accounts for 20% of the thickness of the composite contact.

[0016] The specific composition and weight ratio of the silver alloy contact layer 1: 10% of yttrium oxide, 1% of diamond, and the balance of silver.

[0017] The specific composition and weight ratio of the copper alloy contact layer 2: molybdenum 3%, graphite 4%, copper balance.

[0018] The composite contact is assembled on a miniature circuit breaker for performance testing and the results are: running short-circuit breaking 6,000 amperes, electrical life of 4,000 times, and temperature rise after electrical life test <60K.

Embodiment 2

[0020] The composite contact is composed of a silver alloy contact layer 1 and a copper alloy contact layer 2; the silver alloy contact layer 1 accounts for 40% of the thickness of the composite contact.

[0021] The specific composition and weight ratio of the silver alloy contact layer 1: 15% of yttrium oxide, 10% of diamond, and the balance of silver.

[0022] The specific composition and weight ratio of the copper alloy contact layer 2: molybdenum 20%, graphite 10%, copper balance.

[0023] The composite contact is assembled on a miniature circuit breaker for performance testing and the results are: running short-circuit breaking 10,000 amperes, electrical life 10,000 times, and temperature rise after the test <60K.

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Abstract

The invention discloses a composite contact with high fusion welding resistance for a residual current protective breaker. The composite contact is characterized by comprising a silver alloy contact layer and a copper alloy contact layer, wherein the silver alloy contact layer comprises the following components in proportions by weight: 1-20% of yttrium oxide, 1-10% of diamond and the rest of silver; and the copper alloy contact layer comprises the following components in proportions by weight: 1-50% of molybdenum, 1-20% of graphite and the rest of copper. The thickness of the silver alloy contact layer is 5-50% of the thickness of the whole composite contact. The composite contact has the advantages of excellent performance, low silver content and low price.

Description

technical field [0001] The invention relates to a low-voltage electric appliance contact, in particular to a composite contact of a residual current protection circuit breaker with high resistance to welding. Background technique [0002] Miniature circuit breakers in low-voltage electrical appliances are widely used in various types of industries and civil buildings. In recent years, with the continuous advancement of low-voltage electrical appliances, the size of miniature circuit breakers has been continuously miniaturized. And the technical indicators are getting higher and higher. The short-circuit breaking capacity of foreign advanced miniature circuit breakers has reached 10,000 amperes, and the electrical life has also reached more than 10,000 times. This technological progress puts forward higher requirements on the performance of contact materials used in miniature circuit breakers. At present, the silver-graphite series contact materials mainly used in domestic ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01H1/04H01H1/0237H01H1/025H01H73/04
CPCH01H1/04H01H1/0237H01H1/025H01H73/04
Inventor 孔琦琪石钢
Owner 沈阳新同正复合材料有限公司
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