Contact wear resistance testing tool

Abstract

The invention relates to a tool for testing wear resistance of a contact. The contact wear resistance testing tool comprises a rack, a static contact fixing piece, a sliding table and a driving mechanism, the static contact fixing piece is fixed to the rack and used for installing and fixing a static contact, the sliding table is installed on the rack, a moving contact fixing piece is arranged on the sliding table and used for installing and fixing a moving contact, and the driving mechanism can drive the sliding table to linearly move in a reciprocating mode. The contact working condition of the moving contact and the static contact in the circuit breaker can be well simulated, so that the wear resistance of the contacts is tested, the test cost is low, the contact part of the moving contact and the static contact is exposed outside, and the test efficiency is improved. In the whole test process, test personnel can conveniently observe the abrasion condition of the moving and static contacts in real time.

Description

technical field [0001] The invention relates to the technical field of testing of switch contacts, in particular to a contact wear resistance testing tool. Background technique [0002] The handcart-type circuit breaker realizes the electrical connection between the plum blossom contact of the circuit breaker and the static contact of the switch cabinet by rolling in and out of the handcart. In order to reduce the contact resistance between the plum blossom contact and the static contact, the contact is plated In the silver process, during the sliding process between the two contacts, the silver-plated layer will be worn. If the silver-plated layer is worn and completely exposed to the base copper, the copper will be rapidly oxidized in the atmosphere to produce copper oxide, and the resistivity of copper oxide is high. , will increase the contact resistance between the contacts, resulting in excessive temperature rise in the contact part, partial damage to the product or ev...

AI Technical Summary

Problems solved by technology

[0002] The handcart type circuit breaker realizes the electrical connection between the plum blossom contact of the circuit breaker and the static contact of the switch cabinet through the shaking in and out of the handcart. In order to reduce the contact resistance between the plum blossom contact and the static contact, the contacts are plated Silver process, in the process of sliding between the two contacts, the silver-plated layer will be worn out. If the silver-plated layer is completely exposed to the substrate copper, the copper will be rapidly oxidized in the atmosphere to produce copper oxide, and the resistivity of copper oxide is high. , will increase the contact resistance between the contacts, resulting in excessive temperature rise of the contact part, local damage to the product or even insulation breakdown, and an explosion accident

[0003] If the wear resistance test of the contacts is carried out through the handcart circuit breaker and the switch cabinet, although it can better reflect the actual working conditions and effectively avoid potential safety hazards during the working process of the circuit breaker, it is time-consuming, laborious, and costly. The two contacts are in contact in the switch cabinet, and the wear and tear on the contact surface is not easy to observe

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