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Electrical contact made by sintering alloy, and its manufacturing method

A technology for sintering alloys and electrical contacts, which is applied in the direction of contacts, contact materials, contact surface shape/structure, etc., and can solve the problems of undisclosed impurity concentration and other issues

Active Publication Date: 2008-05-14
MEIDENSHA ELECTRIC MFG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these announcements do not disclose the concentration of the impurity

Method used

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  • Electrical contact made by sintering alloy, and its manufacturing method
  • Electrical contact made by sintering alloy, and its manufacturing method
  • Electrical contact made by sintering alloy, and its manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0031]Fig. 1 shows a cross-sectional view of an electrode of a vacuum interrupter used in the present invention. (a) is a plan view of an electrical contact, and (b) is a cross-sectional view along line A-A in (a). As shown in FIG. 1, an electrical contact 1 is made of a propeller-shaped disc member having a plurality of spiral grooves 2 and a central hole 5C, wherein the spiral grooves 2 are used to prevent the Arc stalls. Electrodes for this vacuum interrupter include electrical contacts 1 , a non-magnetic reinforcing member 3 made of stainless steel, electrode rods 4 and a welding material 5 . The reinforcing member 3 is provided as required; if the strength of the electrical contact is sufficient, the reinforcing member 3 can be omitted.

[0032] The method of making the electrical contacts is as follows. Use thermite chromium powder or electrolytic chromium powder with a particle size not greater than 63 microns, and electrolytic copper powder with a particle size not ...

example 2

[0043] In this example, the electrode for a vacuum interrupter prepared in Example 1 was subjected to an interruption test to evaluate the interruption performance. This intermittent test is carried out by installing the electrode prepared in Example 1 in a vacuum interrupter with a rated voltage of 12 kV, a rated current of 600 A, and a rated interrupting current is 25 kA, and is assembled in image 3 inside the vacuum circuit breaker shown in . Table 1 shows the results of intermittent testing. In No.1 to No.11, thermite chromium powder was used, and in No.12 to No.13, electrolytic chromium powder was used.

[0044] In Table 1, A represents interrupting current, B represents insulation resistance, and C represents welding resistance. Interrupting capability refers to the maximum current value that will be interrupted by the contacts in question. Insulation resistance is the maximum voltage at which contacts spaced 6 mm apart will not discharge. Welding resistance is the...

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Abstract

The present invention relates to an sintered electric contact containing Cr in an amount of 15 to 30% by weight and Cu being balance as main components, 0.05 to 0.5% by weight of Te, 100 to 3000 ppm of O, 7.5 to 900 ppm of Al, and 15 to 750 ppm of Si.

Description

[0001] This application claims priority from Japanese Patent Application Serial No. 2003-371369 filed on October 31, 2003, the contents of which are hereby incorporated by reference into this application. technical field [0002] The present invention relates to a new type of electrical contact, a method of manufacturing such a contact, an electrode for a vacuum interrupter, and a vacuum circuit breaker. Background technique [0003] As an electrode for a vacuum interrupter provided in a vacuum circuit breaker, a sintered chromium-copper alloy is disclosed in Patent Publication No. 1 and Patent Publication No. 2, which is obtained by the following Manufactured in steps: Compression molding of a mixed powder of chromium as a heat-resistant metal and copper as a highly conductive metal, followed by sintering the mixed powder at a temperature below the melting point of copper. Also, in Patent Publication No. 3, an electrode material is disclosed, which is manufactured through t...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01H33/664H01H11/04C22F1/00B22F1/00B22F3/10C22C9/00C22F1/08H01H1/02H01H1/025H01H1/06H01H33/66
CPCH01H1/0206H01H33/664H01H11/048
Inventor 菊池茂马场升西岛阳深井利真
Owner MEIDENSHA ELECTRIC MFG CO LTD