thermal relayThermal relay is a relay that uses the thermal effect generated by the current flowing through the relay to make corresponding actions. The delayed action time of the thermal relay shortens as the passing current increases. It is mainly used for motor protection and control of the heati
Transformers are important electrical equipment in power operation and play an important role in the production of industrial and mining enterprises. Transformer on-load voltage regulating switches often malfunction during operation. The troubleshooting methods and measures are very important for th
Working principle of leakage switchDuring normal operation, there is no leakage current in the circuit except the operating current through the leakage protector. At this time, the currents flowing through the zero-sequence transformer (detection transformer) are equal in magnitude and opposite in d
The windings and iron core of the transformer are the main components that transmit and transform electromagnetic energy. Ensuring their reliable operation is a matter of concern. Statistics show that failures caused by iron core problems account for the third place in total transformer accidents. T
Knowledge point: Lightning protection power distribution deviceIn the construction of power distribution network, lightning protection and grounding protection is an important link. The power distribution network has been exposed to the natural environment for a long time, and its own protection abi
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