Power Transformer - IP (Ingress Protection)

[NickParker]

Why don't the liquid type transformers have IP (Ingress Protection) in their specifications? specifically for the oil tank

 

[edison123]

Because it is supposed to be leak proof and hence zero chance of external particles ingress?

Muthu

http://www.edison.co.in

 

[sunnysky]

It would be redundant to specify IP but they would be IP66 as dust and pressurized waterproof.
They would fail DGA early in life if not.

 

[SilverfoxUK]

you should probably mention whether you are looking at a free breathing transformer with conservator tank or a hermetically sealed transformer. The hermetically sealed is just that, normally under a slight positive pressure so nothing getting in.

 

[prc]

IP class is generally specified for air-filled equipment- control cubicles, air-filled cable boxes etc. For Oil filled equipment, it is not relevant as edison123 explained. In transformers with a breather, dust will not get in as there is a unique oil seal in the breather whereby breathed-in air will bubble through the oil.

 

[che12345]

NickParker (Electrical)(OP)12 Oct 23 19:22
" Why don't the liquid type transformers have IP (Ingress Protection) in their specifications? specifically for the oil tank ? "
The IEC IP code having two digits and plus additional supplements. First digit indicates against ingress of foreign material, the second digit indicates against entry of liquid.
As for the oil tank, it does not fall in the "intention" of the IP Code. If required, it would IP XX i.e. not defined for the first and the second digit.
Che Kuan Yau (Singapore)