Circuit breaker switch DC resistance measuring device

Abstract

A breaker switch direct current resistance measuring device. The outer diameter of a conductive cylinder is smaller than the inner diameter of a cylindrical fixed rod of a tulip contact and the length of the conductive cylinder is larger than that of the tulip contact, a lead is connected with an outer wall at the rear end of the conductive cylinder, the measuring device also includes a push-pull rod and a circular-truncated-cone-shaped supporting block, a plurality of notches are arranged on a side wall at the front end of the conductive cylinder along a circumferential direction, both the push-pull rod and the supporting block are located inside the conductive cylinder and the supporting block is located in front of the push-pull rod, the supporting block, the push-pull rod and the conductive cylinder are coaxially arranged, the diameter of the front end of the supporting block is larger than the inner diameter of the conductive cylinder and the diameter of the rear end is smaller than or equal to the inner diameter of the conductive cylinder, the front end of the push-pull rod is fixedly connected with the rear end of the conductive cylinder, and the rear end of the push-pull rod is located outside the conductive cylinder. Measured data are accurate, a direct current resistance value of a breaker switch can be reflected accurately, unnecessary loss is not caused to generation of electricity, a complicated process of dismounting and mounting the tulip contact is omitted, and the breaker switch direct current resistance measuring device is simple in structure and convenient to operate, and saves both time and labor.

Description

technical field [0001] The invention belongs to the technical field of electric power measuring tools, and relates to a device for measuring DC resistance of a circuit breaker switch. Background technique [0002] The safe and stable operation of the circuit breaker switch plays a very important role in the safety and reliability of the power supply system. If the DC resistance of the circuit breaker switch is too large, it will cause the contacts inside the switch to heat up, and in severe cases, it will cause a fire. Therefore, it is very necessary to test the DC resistance of the circuit breaker switch. The current method used to measure the DC resistance of the handcart circuit breaker switch is to use two wire clips to clamp a plum blossom contact on the circuit breaker switch, and the lead wire is connected to the wire clip. This measurement method measures the internal contact of the switch. and the sum of the resistance values ​​of the two plum-blossom contacts, the...

AI Technical Summary

Problems solved by technology

If the DC resistance of the circuit breaker switch is too large, it will cause the contacts inside the switch to heat up, and in severe cases, it will cause a fire. Therefore, it is very necessary to test the DC resistance of the circuit breaker switch.

The current method used to measure the DC resistance of the handcart circuit breaker switch is to use two wire clips to clamp a plum blossom contact on the circuit breaker switch, and the lead wire is connected to the wire clip. This measurement method measures the internal contact of the switch. and the sum of the resistance values ​​of the two plum-blossom contacts, the measurement is inaccurate, so it cannot accurately reflect the DC resistance value of the circuit breaker switch, resulting in misjudgment of the measurement results, which will cause unnecessary losses to power production

If you want to measure accurately, you can only remove the plum blossom contact, and then install the plum blossom contact after the measurement is completed, but disassembling the plum blossom contact is very cumbersome, time-consuming and laborious, and affects work efficiency

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