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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:
|
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 |
≤350μΩ |
|
|
load bearing of short-circuit(KA) |
Thermal stabilization |
18.75 |
|
dynamic stability |
7.65 |
|
|
Dielectric level |
Rated voltage |
20 |
|
Power-frequency |
20 |
|
|
Impulse voltage |
55 |
|
|
Temp.-rise limit of contact(k) |
≤15 |
|
