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Liaoning Jinli Electric Power Electrical Appliance Co.,Ltd

Non-excitation Tap Changer

Non-excitation Tap Changer

Non-excitation Tap Changer We are , Liaoning Jinli, specialized in Transformer Tap Changer such as OLTC、Off Circuit Linear Tap Changer、Off Circuit Cylindrical Tap Changer etc with 30 years experiences. Non-excitation tap changer is applying for many type of transformer such as power...

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Product Details

Non-excitation Tap Changer
We are , Liaoning Jinli, specialized in Transformer Tap Changer such as OLTC、Off Circuit Linear Tap Changer、Off Circuit Cylindrical Tap Changer etc with 30 years experiences. Non-excitation tap changer is applying for many type of transformer such as power transformer、distribution transformer and so on.

By today, we have sold our products all over the country and around worldwide market and established long term cooperation relationship with domestic companies “Zhixin Group”, “Tianwei Group”, “ABB Group”, “Xuji Group” and world famous Australian WILSON company, TRAFO Spain SL company, SGB-suit Group in Malaysia, Alfanar company in Saudi Arabia. 

An efficient distribution grid has as little equipment as possible. This enables savings of both investment as operating expenses. Voltage regulation distribution transformers with linear tap changers help to improve the efficiency of grid sections. Using them can reduce the total number of secondary substations.

In some tap changers which are placed in secondary side of the transformer. This type of taping is used in step-up transformer where low voltage winding is in primary side and high voltage winding is in secondary side. It shows the tap changer circuit on secondary side with tap interval of 2.5 %. In some distribution transformers the tap changer resolution can be up to 1% for fine adjustments.

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

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