Pad Mounted Transformer Type Cage Off-circuit Tap Switch

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  • Details

This tap changer is mainly used for combined type (base type) transformer,which is called as “American-box type”in our country. It must tap and change under off-circuit status, and is used to finish voltage regulating function of primary coil.


American-BOX TYPE CAGE OFF-CIRCUIT TAP SWITCH- Used in mineral oil or silicon oil

- Rated Voltage 10KV-36KV

- Rated current from 63A-125A

- Tapping position: 3-5

- Regulation 2.5% per position


Model Explanation 
WST □ - □/□-□X□

W: off-circuit
S : three-phase or D for single phase
T : linear type tap changer
□: voltage regulation model
□: rated current
□: rated voltage
□: number of tapping heads
□: number of tapping position

Voltage Regulation Model
I : terminal point
II : central point
III : neutral point
IV : Y-△ conversion
V : series-parallel connection

Our Advantage

* High pressure capability
* Strong anti-aging ability
* Strong anti-lightning impact
* Strong protection
* Use smoothly
* Stable use

Model No.    Rated
voltage kV
Installation dimension
           (mm)
 H1H2HMd
WSLII263~125/10-4×310 956524563A,Md=M6;125A,Md=M8
WSLⅡ263~125/10-6×5 9565245
WSLⅡ263~125/20-4×320110100330
WSLⅡ263~125/20-6×5110100330
WSLⅡ263~125/35-4×335130110370
WSLⅡ263~125/35-6×5130110370


Model No.Rated
voltage kV
Installation dimension
(mm)
H1H2HMd
WSLⅡ363~125/10-4×31010565255

63A,Md=M6;125A,Md=M8
WSLⅡ363~125/10-6×510565255
WSLⅡ363~125/20-4×320120100345
WSLⅡ363~125/20-6×5120100345
WSLⅡ363~125/35-4×335135110380
WSLⅡ363~125/35-6×5135110380


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