Detection device for insulation resistance of electrical equipment

Abstract

The invention discloses a detection device for an insulation resistance of electrical equipment. The detection device comprises an insulation resistance measuring circuit 2 and an isolation resistance 5, wherein a high-voltage end 4 of the insulation resistance measuring circuit 2 is connected with one end 6 of the isolation resistance 5, the other end 7 of the isolation resistance 5 is connected with any one conductor in a conductor 9, which is electrically connected with the electrical equipment, a low-voltage end 3 of the insulation resistance measuring circuit 2 is connected with ground 10, and the insulation resistance measuring device 1 can be used for applying the direct current voltage between the conductor 9 and the ground 10, and measuring an insulation resistance value between the electrical equipment, which is electrically connected with the conductor 9, and the ground 10.

Description

Technical field [0001] The invention relates to the insulation resistance detection of electrical equipment, in particular to the online detection of the insulation resistance of high-voltage electrical equipment. Background technique [0002] At present, the insulation resistance measurement of electrical equipment is generally carried out during preventive tests and equipment maintenance. If an abnormality of the equipment is found or deemed necessary between the two preventive tests, the measurement is arranged temporarily. When measuring the insulation resistance of the equipment, it is necessary to connect the measuring instrument to the equipment under test, which is time-consuming and labor-intensive; especially to measure the insulation resistance of high-voltage electrical equipment, a series of operations and safety measures are required before the measurement, which requires a lot of work and cumbersome operation. With a certain degree of danger. [0003] Chinese patent...

AI Technical Summary

Problems solved by technology

When measuring the insulation resistance of equipment, it is necessary to connect the measuring instrument to the equipment under test, which is time-consuming and laborious; especially to measure the insulation resistance of high-voltage electrical equipment, a series of operations and safety measures are required before the measurement, the workload is heavy, the operation is cumbersome, and with a certain risk

[0003] Chinese patent 02256934 discloses a high-voltage motor insulation on-line monitoring device, which uses the high voltage of the system as the measurement power supply, conducts uninterrupted measurement after the motor is out of operation, and transmits the measurement results through infrared emission. The disadvantage is that the measurement device is connected across the Between the incoming line terminal and the load terminal of the high-voltage switch, after the switch is disconnected, the motor is still connected to the system high voltage through the measuring device, and the problem of separation between the measuring device and the high voltage needs to be solved when the motor and the measuring device are overhauled

[0004] Chinese patent 200620070856.7 discloses a high-voltage isolator for high-voltage motor insulation detection. Its principle is to measure after the motor stops running. During the measurement, the lead wire of the detection device is connected to the high voltage by using the electromagnet drive rod; after the measurement is completed, the electromagnet is released, and the detection device is connected to the high voltage High-voltage separation; this scheme does not affect the maintenance of the motor and detection device, but has higher requirements on the reliability of the electromagnet mechanism

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