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Classification of voltage transformers

Release time:

Sep 27,2021

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Classification of voltage transformers
Classification of voltage transformers

classification of voltage transformer:

1. General voltage transformers are divided according to their uses: measurement and protection.

2. Voltage transformers are divided into single-phase and three-phase according to the number of phases.

3. The voltage transformer is divided into electromagnetic voltage transformer (VT) and capacitive voltage transformer according to the transformation principle.

4. Voltage transformer according to the number of windings: double winding voltage transformer, its low voltage side only a secondary winding voltage transformer; Three winding voltage transformer, there are two separate secondary winding voltage transformer; Four winding voltage transformer, there are three separate secondary winding voltage transformer.

5. Voltage transformers are divided into grounding voltage transformers according to the grounding state of primary windings: grounding voltage transformers, single-phase voltage transformers directly grounded at one end of primary windings, or three-phase voltage transformers directly grounded at star connection points (neutral points) of primary windings; Ungrounded voltage transformers, all parts of primary windings, including connection terminals, are voltage transformers insulated to the ground according to the rated insulation level.

6. Voltage transformers are classified according to the types of devices: indoor type and outdoor type.

7. Voltage transformers are divided into single-stage voltage transformers according to their structural forms, 1. secondary windings are on the same core column, and insulation is not graded. Cascade voltage transformer, the primary winding is formed by connecting several secondary windings with equal turns and the same geometric size in series, and the grounding terminal of the secondary winding and the primary winding is on the same core column.

8. Voltage transformers are divided into insulating media: dry type, pouring, oil immersion, gas insulation, etc.

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