Synchronous detector

Abstract

Disclosed is a synchronous detector which is convenient to operate and use. The synchronous detector includes a power supply. The power supply includes a direct-current (DC) power supply and an alternating-current (AC) power supply which are mutually connected in a parallel way. A DC indication light is serially connected with a circuit which the DC power supply is in and an AC indication light is serially connected with a circuit which the AC power supply is in. One end of the power supply is electrically connected with an AC-DC converter which is serially connected with a three-phase circuit breaker through a circuit. And a contact point and a signal indication light are serially connected between each phase of the three-phase circuit breaker and the other end of the power supply respectively. Three 1.5V batteries or a 220V AC power supply is selected in the synchronous detector as needed. In use, corresponding yellow, green and red wires are connected at two sides of the circuit breaker or a vacuum tube and the vacuum breaker is switched on step by step so that asynchronous phases can be detected visually through twinkling of bulbs and then adjustment is made until three-phase contacts of the vacuum tube are synchronous. Detection work of maintenance personnel is greatly facilitated.

Description

technical field [0001] The invention relates to a detection instrument, in particular to a vacuum circuit breaker synchronous detection instrument. Background technique [0002] The vacuum circuit breaker of the high-voltage switchgear of the ground substation and the vacuum tube of the underground vacuum switch will have deviations that cannot be detected by the naked eye due to long-term use of the three-phase contacts. It has brought great hidden dangers to the safe power supply work of the mine. Without special instrument detection, it is often difficult to judge the accident point. The traditional monitoring method is to use a multimeter to measure each phase one by one, but cannot simultaneously measure whether the three-phase contacts of the vacuum switch vacuum tube are synchronized. The measurement is very inconvenient and the result is inaccurate. It restricts mine safety production. Contents of the invention [0003] The invention aims at the disadvantages and...

AI Technical Summary

Problems solved by technology

[0002] The vacuum circuit breaker of the high-voltage switchgear of the ground substation and the vacuum tube of the underground vacuum switch will have deviations that cannot be detected by the naked eye due to long-term use of the three-phase contacts. It has brought great hidden dangers to the safe power supply work of the mine. Without special instrument detection, it is often difficult to judge the accident point

The traditional monitoring method is to use a multimeter to measure each phase one by one, but cannot simultaneously measure whether the three-phase contacts of the vacuum switch vacuum tube are synchronized. The measurement is very inconvenient and the result is inaccurate. Restricting mine safety production

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