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
1. Operation inspection measures for distribution transformers(1) Noise inspectionDistribution transformers usually emit a "buzzing" sound during operation, which is uniform and slight. When the sound changes, it means that there is a certain fault in the distribution transformer. Therefor
1. The hazards, causes and types of multi-point ground faults in the transformer core1. The hazards of multi-point ground faults in the coreDuring normal operation of the transformer, the core cannot be grounded at multiple points. During normal operation of the transformer, there is an alternating
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