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Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Plastic Wheel Linear Tap-changer

Plastic wheel L inear T ap-changer OFF-Load Tap Change : Mainly Used in Solar Power Project, Wind Projects. Here Generating voltage level is LT at Conversion Level. Solar Inverter Duty oil type Transformer & Dry Type Transformer is having OFF-Load Tap Change. Tap Changing will happen While...

Product Details

Plastic wheel Linear Tap-changer 

OFF-Load Tap Change: Mainly Used in Solar Power Project, Wind Projects. Here Generating voltage level is LT at Conversion Level. Solar Inverter Duty oil type Transformer & Dry Type Transformer is having OFF-Load Tap Change.

Tap Changing will happen While Transformer is in OFF-Load or No-Load. In Dry Type Transformer, Cooling Phenomenon mainly is Air Natural. Normally In ON-Load Tap Changer, Arc Quenching will be limited by medium of Oil When Transformer is ON-Load. But OFF-Load Tap Changer, Tapping will be done only When Transformer is in OFF-Switch Condition. In Dry Type Transformer Air is the only cooling medium which is limited Energy to Arc Quench.

As customers of public distribution grid operators expect to be provided with a relatively constant voltage within a narrow bandwidth regulated by standards, drawing hand wheel terminal point linear tap-changer will help to provide a reliable supply of electricity.

Model Explanation
 WST □ - □/□-□╳□
    W:  off-circuit
    S :  three-phase or D for single phase
    T :  linear type tap chager
    □:  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

Samples Technical Data

Specifications

WST 30

WST 63

WST 125

WST 250

WST 400

WST 500

Phase number

three-phases

Connection mode

Central point(Ⅱ) Neutral Point(Ⅲ) Terminal Point(Ⅰ)

Rated through current(A)

30

63

125

250

400

500

Short-circuit capacity

Heat stableness current(KA/2s)

0.7

1.6

2.5

3.75

4

5

Dynamic stableness current(KA)

1.8

4

6.25

9.375

10

12.5

           Rated frequency

50~60

Insulation level(KV)

Rated Voltage

10KV

20KV

35KV

Power-frequency withstand Voltage(50Hz/1min)

42KV

55KV

95KV

Impulse(1.2/50μs)

75KV

125KV

250KV

Sealing Performance(KPa/24h)

60

Machine life(Thousands of times)

2

Samples Installation Dimension

No.

Model No.

Regulating

position

Install dimension  mm

L

L1

L2

L3

L4

L5

H

H1

1

WSTⅡ63/10-4×3

Central

376

143

122

59

99

24

100

78

2

 WSTⅡ125/10-4×3

431

163

142

59

107

29

100

78

3

 WSTⅡ250/10-4×3

431

163

142

59

112

29

100

78

4

 WSTⅡ300/10-4×3

530

203

169

69

112

34

106

78

5

WSTⅡ63/20-4×3

426

168

137

59

99

24

100

78

6

 WSTⅡ125/20-4×3

475

183

154

59

107

29

102

78

7

 WSTⅡ250/20-4×3

530

203

169

59

112

34

102

78

8

WSTⅡ63/35-4×3

526

218

157

59

103

24

120

98

9

 WSTⅡ125/35-4×3

580

228

179

59

107

34

120

98

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