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2025.12.31

The function of a single-phase drum-type tap changer

The core function of a single-phase drum-type tap changer is to adjust the transformer’s output voltage by switching between winding taps, thereby ensuring stable grid voltage.

The function of a single-phase drum-type tap changer

2025.12.31

What are the advantages and disadvantages of drum-type tap changers?

Voltage regulation: By adjusting the turns ratio of the windings (V1/V2 = N1/N2), it accommodates grid fluctuations and load demands, thereby preventing overvoltage or undervoltage.

What are the advantages and disadvantages of drum-type tap changers?

2025.12.31

Working Principle of Drum (Tube) Type Tap Changers

Tap changers of the drum type adjust the transformer’s output voltage by switching between tap connections on the winding. Their core principle is to change the tap position while the transformer remains de‑energized, thereby altering the turns ratio and stabilizing the grid voltage.

Working Principle of Drum (Tube) Type Tap Changers

2025.12.31

The function of a drum-type tap changer

The core function of a drum-type tap changer is to adjust the transformer’s output voltage by switching between winding taps, thereby ensuring stable grid voltage.

The function of a drum-type tap changer
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