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The Working Principle of Voltage Transformers
The working principle of a voltage transformer is the same as that of a transformer, with its basic structure consisting of an iron core and primary and secondary windings. It is characterized by small and relatively constant capacity, operating close to no-load condition during normal operation.
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Precautions for the Use of Voltage Transformers
1、Before putting a voltage transformer into operation, conduct test inspections in accordance with the items specified in the regulations. For example, measure polarity, check connection groups, test insulation resistance, and verify phase sequence.
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Abnormalities and Handling of Voltage Transformers
Common Abnormalities：1、Unbalanced three-phase voltage indication: One phase drops (may be zero) while the other two are normal, line voltage is abnormal, or accompanied by audio and visual signals. This may be due to the melting of the high-voltage or low-voltage fuse of the transformer.
