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WST4 type three-phase off-load tap-changer (star connection)
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WST4 type three-phase off-load tap-changer (star connection)

Product Details

This switch is suitable for three-phase combined oil-immersed transformer power with rated voltage of 10KV-36KV and rated current of 63A-250A; its voltage regulation modes include: central part, terminal point and neutral point, which can be directly fixed on the oil tank cover of the transformer and switched under the condition of open circuit.

WST4 three-phase tap changer (star connection)


Used in mineral oil or silicone oil

Rated voltage 10 KV-36 KV

Current rating 63 A to 250 A

Knock position: 3-7

The regulatory fee rate is 2.5% per transaction.


Model interpretation


W: Power off

S: three-phase; D: single-phase

T: Linear tap changer


Voltage regulation model

Rated current

Rated voltage

Number of tapping heads

Number of tap positions

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Voltage regulation model

I: End point

II: Center point

III: Neutral point

IV: Y- △ conversion

V: Series-parallel connection



Our advantage

High pressure capability

Powerful anti-aging ability

Strong lightning protection impact

Strong protection

Smooth use

Stable use


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