How to detect high voltage motor electrical connection fault? Are you still worried about the electrical connection failure of the high voltage motor? Lanhai electromechanical for you today to solve your share of worries, then small make up to see how to detect the high voltage motor electrical connection fault!

　　I. disadvantages and deficiencies of traditional motor fault inspection methods:

　　In the motor fault, the fault induced by electrical connection accounts for a large proportion, and it is often easy to find the fault point. To determine whether the electrical connection points are in good contact, the following are usually used:

　　(1) intuitive inspection: that is, check the connection point has no discoloration, arc burn mark, no fracture, etc.

　　(2) hammer check: that is, with a small hammer tap joint, listen to whether there is abnormal sound.

　　(3) fastening bolts: all the electrical connection points to re-tighten, loose contact is bad.

　　(4) plug ruler inspection: measure the two joint surface close degree, there is a gap for poor contact.

　　Electrical inspection: measuring the dc resistance of the motor with a double-arm bridge, comparing the records over the years (pay attention to convert to the same temperature), the mutual difference is greatly poor contact.

　　2. Two better fault diagnosis methods:

　　In infrared thermometer to test the temperature of the electrical connections, the temperature is a very important factor in equipment fault diagnosis, the electrical connection is bad, often join fever caused by temperature change can be judged connection failure, using infrared thermometer can quickly provide temperature measurement, safe, accurate and without downtime.

　　2. Circuit resistance tester measures the contact resistance of electrical connection points. Circuit resistance tester USES 220V ac power supply, which is composed of digital voltmeter and adjustable constant current source. It can directly read the contact resistance value from the digital meter at a large current of 100A for specific contact points. It can clearly and intuitively reflect whether the connection is in good contact.

　　3. The two new methods can directly, comprehensively and accurately detect the poor contact at the electrical connection point of the motor, and timely discharge the hidden danger of accidents. There are many connection points in large and medium-sized dc motor, especially the electrical connection points between copper and aluminum are easy to contact bad, before is a fault, must stop maintenance, now changed to a new method of detection can not stop. The practice proves that the new method is effective in protecting the motor and buying a lot of time for production.