Transformers are stationary equipment that operate continuously, with relatively reliable operation and less chance of failure. However, since most transformers are installed outdoors and are affected by the load they bear during operation and the short-circuit faults of the power system, various fa
What is a secondary loop?In a substation, various types of relay protection devices, measurement and control devices, safety automatic devices, fault recording devices, etc. are collectively referred to as secondary equipment.The so-called secondary circuit is an electrical circuit formed by connect
01 Principle and function of relayThe principle of a relay is an electrical component based on the phenomenon of electromagnetic induction. Relays are composed of coils, iron cores and contacts. When the coil is energized, the magnetic field generated magnetizes the iron core, which in turn attracts
1. Voltage problemReason: High voltage will cause the transformer to be over-excited and the sound will become louder and sharper, which will directly seriously affect the noise of the transformer.Judgment method: First look at the low-voltage output voltage. Do not look at the voltmeter on the low-
Classification of circuit breakers1Frame circuit breaker (ACB)Frame circuit breaker is also called universal circuit breaker. All its parts are installed in an insulated metal frame. It is usually open. It can be equipped with a variety of accessories. It is more convenient to replace contacts and c
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