A Hermetically Sealed Oil Immersed Transformer is an oil immersed transformer with a sealed tank structure. The design helps keep the oil away from outside air and moisture, so the oil condition can stay more stable during service. It is used in distribution projects where the owner wants less daily oil handling and a cleaner tank arrangement. The corrugated or sealed tank can absorb oil expansion by its own structure, depending on design. This product still needs normal checks, but it reduces some open-breathing concerns seen in older transformer layouts.
Product Parameters
|
Parameter |
Value |
|
Phase |
Three phase |
|
Input voltage |
6kV / 10kV / 15kV / 20kV / 35kV |
|
Output voltage |
110V / 220V / 380V / 400V / 440V / 480V |
|
Rated capacity |
30kVA-2500kVA |
|
Frequency |
50/60Hz |
|
Vector group |
Dyn11 / Yyn0 |
|
Cooling method |
ONAN |
|
Winding material |
100% copper |
|
Standard |
IEC / ISO / CE / ANSI / IEEE |
|
Warranty |
2 years |
Components
The unit can include sealed oil tank, core, winding, transformer oil, bushings, tap changer, pressure relief part, thermometer, and lifting lugs. For a Hermetically Sealed Oil Immersed Transformer, tank sealing and oil level checking should be handled carefully before shipment.
Product Advantages
The sealed structure helps limit moisture contact with transformer oil.
The tank arrangement can reduce routine oil exposure during service.
It is suitable for outdoor distribution points and plant power systems.
FAQ
Q: Does sealed mean no inspection?
A: No. Sealed design reduces some oil contact, but visual checking, temperature checking, and regular maintenance are still needed.
Q: Where can it be installed?
A: It can be used in outdoor distribution, industrial sites, and substations when the model matches site voltage and capacity.
Q: What should be checked before delivery?
A: For a Hermetically Sealed Oil Immersed Transformer, sealing surface, oil filling, accessories, and test report should be checked.
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