25 -2500 kVA up to 36 kV high voltage level in the power range up to three or single phase, oily,of course, cooled(Onan), idle tap-changer or with load automatic tap changer, in a way that can be used in both external and internal are produced.
Has no expansion tank,the boiler is filled completely with oil.
Hermetic type transformers were closed to the atmosphere making hermetic pressure setting in a factory environment.
The wavy elastic and thermal effects due to expansion of the oil is controlled with boiler design. Forwarding to the outside walls and the heat wave, and with the movement of expansion and contraction, which expands to absorb additional oil, and serve.
Transformer oil does not interact with the environment because there is no oxygen in the air. Therefore, depending on the oxidation-oil aging is not. With airtransformer oil is not moisture it is not making contact.Therefore, expansion tank, hermetic type transformers are longer than the ones.
Hermetic transformers do not need maintenance and cleanliness of the bushing beyond the control of the protection devices.
There is the possibility of mounting in small spaces and is lower in height. For compact transformer stations is advantageous. The cable of the expansion tank and links Bar, Safety distances in terms of the adverse effects in hermetic transformers is out of the question.
Areas Of Use
Local distribution centers(direct or transformer Pavilion)
Organized industrial zones