1 Basic principles and structure of on-load tap-changerAn on-load tap changer is an electrical device that can change the tap position under excitation. The basic principle of voltage regulation by on-load industrial electrical tap changers is to lead out several taps in the transformer winding and

Three-phase imbalance is an important indicator of power quality. Although there are many factors that affect the power system, normal imbalance is mostly due to asymmetry of three-phase components, line parameters or loads. Since the three-phase load factor is not certain, the three-phase voltage a

Abnormal soundWhen the transformer is operating normally, it will emit a continuous and uniform "buzzing" sound. If the sound generated is uneven or has other special sounds, it should be considered that the transformer is not operating normally, and the fault can be found based on the dif

Transformer impulse voltageTransformer Impulse Voltage refers to the transient high voltage pulse suddenly applied to the transformer insulation system due to changes in weather conditions, lightning strikes, etc. in the power system. This pulse voltage has very high peak voltage and fast rise time