Star (Y) connection high voltage electric motor insulating detection apparatus

Abstract

The invention discloses a star (Y) connection high voltage electric motor insulating detection apparatus, and relates to the technical field of high voltage electric motor insulating detection. The apparatus is composed of a detection main circuit, an AC control circuit and a DC control circuit, wherein the main circuit constitutes a closed detection loop together with high voltage isolators GLO<1>-GLO<n>, a high voltage isolator GLQ, high voltage vacuum relays ZK<1>, ZK<2>, and an insulating detection instrument through insulation against ground resistors RM<1ground>-RM<1ground> of to-be-tested electric motors M<1>-M<n> with neutral points of the star winding of the electric motor as detection points. A high voltage energized display DX can provide electric interlock protection when an accident happens and the detection main circuit is energized while the detection main circuit is detected. Theapparatus has the characteristics of safety and reliability, accurate detection and simple operation. The apparatus can automatically complete starting, discharge examination, detection and other procedures after a detection command is transmitted, and displays insulation resistor RM<ground>, absorption ratio DAR, polarization index PI and other insulation parameters of the electric motor M in a digital window of a M<ohms> tester. The M<ohms> can print, save, and communicatively upload data, and completely overcomes the inconvenience and complexity of manual insulation detection of a high voltage electric motor.

Description

[0001] Technical field: [0002] The invention relates to the technical field of high-voltage motor insulation detection, in particular to an insulation detection device for a star-shaped (Y) connection high-voltage motor. [0003] Background technique: [0004] Insulation testing must be carried out before the high-voltage standby motor is put into operation. The traditional manual shake-test insulation, especially for modern high-voltage switchgear with five-proof functions, the telemetry insulation must strictly follow the following operating procedures: set the vacuum circuit breaker QF of the high-voltage switchgear to the test position -Close the grounding switch-open the back door of the switchgear-pull the grounding switch-electricity test at the detection point-remotely measure the insulation resistance-close the grounding switch-close the back door of the switchgear-open the grounding switch-circuit breaker in the operating position-put into operation, This operation ...

AI Technical Summary

Problems solved by technology

[0004] Insulation testing must be carried out before the high-voltage standby motor is put into operation. The traditional manual shake-test insulation, especially for modern high-voltage switchgear with five-proof functions, the telemetry insulation must strictly follow the following operating procedures: set the vacuum circuit breaker QF of the high-voltage switchgear to the test position -Close the grounding switch-open the back door of the switchgear-pull the grounding switch-electricity test at the detection point-remotely measure the insulation resistance-close the grounding switch-close the back door of the switchgear-open the grounding switch-circuit breaker in the operating position-put into operation, This operation process is strict and cumbersome. Improper operation may damage the equipment. It will take 20-30 minutes for two skilled on-duty staff to complete it. If the equipment is in hot standby mode, the hot standby function will be completely lost at this time. , so there is an urgent need for a new ideal insulation detection device, and it is especially suitable for the insulation detection of high-voltage motors with star (Y) connection, but no similar products and designs have been seen so far.

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