WST 30/20-6X5S New Type Strip Form Tap Changer for Transformer

WST 30/20-6X5S New Type Strip Form Tap Changer for Transformer

Description

With new type of operating system – New Type Hand Wheel & Drawing Operation similar as foreign models. Aluminum and plastic material with two different colors for chosen which can be satisfied by different demand.
Specific introduction:
This series of switches is composed of the main body of the switch and the operation turning organ. They are applicable to the oil-immersed transformers with the frequency of 50HZ,60HZ,rated voltage of 35KV,66KV,110KV,rated current of 200A-1500A.They can be fixed on the body of the transformer or on the box-cover,and be tapped,regulated and changer under non excitation condition.
Technical data:

With new type of operating system – New Type Hand Wheel & Drawing Operation similar as foreign models. Aluminum and plastic material with two different colors for chosen which can be satisfied by different demand.

Specific introduction:

This series of switches is composed of the main body of the switch and the operation turning organ. They are applicable to the oil-immersed transformers with the frequency of 50HZ,60HZ,rated voltage of 35KV,66KV,110KV,rated current of 200A-1500A.They can be fixed on the body of the transformer or on the box-cover,and be tapped,regulated and changer under non excitation condition.

Technical data:

Item No. of the tap changer

WST 30/20-6X5S

Rated current(A)

30

Rated votage(kV)

20

Rated power(HZ)

50/60

Number of phase

3

Regulating position

central

Quantity of tapping heads

6

Quantity of working position

5

life times

5000

contact pressure between
dynamic and static contactor

≤350μΩ

load bearing of short-circuit(KA)

Thermal stabilization
(2S effectitive value)

18.75

dynamic stability
(peak value)

7.65

Dielectric level
(KV)

Rated voltage

20

Power-frequency
voltage

20

Impulse voltage

55

Temp.-rise limit of contact(k)

≤15

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