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Positive-negative Off Load Tap Changer

P ositive-negative Off Load Tap Changer Manual Cage Off Load Tap Changer is applied to power transformer, transformer rectifier, furnace transformer and other rated currents of 125A-2000A transformers. A transformer rectifier is a type of transformer that contains thyristors or diodes within a...

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Product Details

Positive-negative Off Load Tap Changer
Manual Cage Off Load Tap Changer is applied to power transformer, transformer rectifier, furnace transformer and other rated currents of 125A-2000A transformers. A transformer rectifier is a type of transformer that contains thyristors or diodes within a single tank. It may also include voltage regulation. It is highly beneficial for processes in industries that necessitate a large supply of direct current (DC).Typical applications consist of smelting operations, electrolysis, direct current traction and others.

A transformer rectifier is an electronic device that can be used to convert alternating current (AC), which reverses direction, into direct current. This process is known as rectification.

The most common type of arrangements is the last two, in the middle of the winding and at the star point. This is because they give the least electrical stress between the tap changer and earth; along with subjecting the tapings to less physical and electrical stress from fault currents entering the line terminals. At lower voltages the tap changer may be located at either the low voltage or high voltage windings.
Model Explanation
 WSL□ □/□-□╳□ □
    W:  off-circuit
    S :  three-phase
    L :  cage type
    □:  voltage regulation model  
    □:  rated current
    □:  rated voltage
    □:  number of tapping heads
    □:  number of tapping position
    □:  L for vertical ; W for horizontal
    D for top tank installation; WD for bell-type installation  

Voltage Regulation Model
    I  :  linear regulating
    II :   central point
    III :  neutral point
   IV :  Y-△ conversion
    V :   series-parallel connection
   VI:   positive and negative regulation

Samples Technical Data

Model No.

Voltage regulating

Installation dimension( mm )

Power frequency

withstand voltage

(KV/1min)

L1

L2

L

Md

To earth

Inter phase

Inter contact

WSLⅡ 200~630/10-6×5~10×9  D

Central point

150

110

480

200A:Md=M12;400A:Md=M16;630A:Md=M18

45

45

18

WSLⅢ 200~400/10-5×5~10×10  D

Neutral point

150

110

480

WSLⅡ 200~630/35-6×5~10×9  D

Central point

210

170

650

95

95

30

WSLⅢ 200~400/35-5×5~10×10  D

Neutral point

210

170

650

WSLⅡ 200~630/66-6×5~8×7  D

Central point

380

240

953

140

140

45

WSLⅢ 200~400/66-5×5~8×8  D

Neutral point

380

240

953

140

95

30

WSLⅡ 200~630/110-6×5 D

Central point

470

400

1370

230

230

55

WSLⅢ 200~400/110-6×6  D

Neutral point

470

400

1370

230

140

45

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