Rules and Causes of Overheating of Electrical Equipment 1. External thermal fault External thermal failure of electrical equipment mainly refers to the exposed joint due to poor crimping and other reasons, under the action of high current, the joint temperature increases, the contact resistance increases, and the vicious cycle causes hidden dangers. Such failures account for more than 90% of external thermal failures. Statistics of thousands of external thermal failures detected in recent years.The thermal failure of wire clamp and brake contact accounts for 77% of the entire external thermal failure. Their average temperature rise is about 30 ° C. The average temperature rise of other external joints is between 20-25 ° C. Combined with the detection experience , according to the number of temperature rises. External failures can be divided into three types: minor, general and serious. 2. Internal thermal failure The internal thermal failure of high voltage electrical […]
Electrical Equipment
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