Building Transformer in explosion proof enclosure

[WilliamAng]

Hi,

i would like to place a 60kVA 3-Phase Dry Type isolation Transformer into a explosion proof enclosure.

but i'm worry about the ventilation inside the explosion proof enclosure for the transformer.

Please help.

William

 

[WilliamAng]

Hi All,

the transformer will be place in Zone 1 (in a chemical room)

I was just told to design a Dry type isolation transformer With explosion proof enclosure (Steel material).

i had up-size the transformer to 80kVA which is around 30% additional.
but the rating i'm stated on the transformer is 60kVA.

I also getting a bigger enclosure to have more space for ventilation.

but i still have worry's, because the enclosure is totally seal up inside.

 

[Darkwood]

Im kind of in the thinking that you should be expressing the original poor design nature of doing such a thing, I would like to hear their justification for needing such a set up as oppose to having the transformer external in a safe area and any lighting, ventilation etc can easily be supplied using fixtures, fittings and installation practices that meet zone 1 requirements. I assume this is in Singapore as I doubt you could get away with such an install over here without special approval and a full fail safe system in place for cooling the transformer whether it be air or liquid cooling. That aside you may be looking into Aviation industry that use bomb resistant enclosures in cargo holds in some cases and this would be my first port of call.......... but personally I wouldn't even bother trying to undertake such a task as your only making a rod for your own back here.

 

[44ALLAN]

William,

Forgive me for asking but are you wanting this enclosure to contain an internal explosion or to be able to protect the transformer from an external explosion ?
EExd enclosures are designed to contain an internal explosion without 'migrating' to the external atmosphere ( basic speak).
You can also buy Zone 1 transformers but as has already been said.............why they would want to put one in a chemical room is beyond me !
Wouldn't fancy working in there even though it will be nice and warm during the winter lol

 

[brookster]

William,

Forgive me for asking but are you wanting this enclosure to contain an internal explosion or to be able to protect the transformer from an external explosion ?
EExd enclosures are designed to contain an internal explosion without 'migrating' to the external atmosphere ( basic speak).
You can also buy Zone 1 transformers but as has already been said.............why they would want to put one in a chemical room is beyond me !
Wouldn't fancy working in there even though it will be nice and warm during the winter lol

I think what the enclosure is for, rather than keeping an explosion inside is to keep power running in the case it is bombed.

 

[44ALLAN]

I think what the enclosure is for, rather than keeping an explosion inside is to keep power running in the case it is bombed.

Aye that's why I was asking...........thought it strange!
Glad that's not part of my remit......................sandwich van being late is normally my main worry

 

[brookster]

Aye that's why I was asking...........thought it strange!
Glad that's not part of my remit......................sandwich van being late is normally my main worry

Missing lunch is far more dangerous than an exploding bomb

 

[WilliamAng]

thanks for everyone reply.

i had checked with my end user, they going to use this transformer in the ship not chemical room.

they wanted the transformer to be complete with explosion proof enclosure.

they worry about internal explosion.

sorry for my mistake previously.

 

[brookster]

thanks for everyone reply.

i had checked with my end user, they going to use this transformer in the ship not chemical room.

they wanted the transformer to be complete with explosion proof enclosure.

they worry about internal explosion.

sorry for my mistake previously.

GRRRRRRRRRRRRRRr

 

[44ALLAN]

GRRRRRRRRRRRRRRr

Lol.

Oh dear.............

 

[44ALLAN]

thanks for everyone reply.

i had checked with my end user, they going to use this transformer in the ship not chemical room.

they wanted the transformer to be complete with explosion proof enclosure.

they worry about internal explosion.

sorry for my mistake previously.

Then just purchase a Zone 1 transformer mate.....................that's what their designed for

 

[Darkwood]

Just as a matter of interest are you protecting the transformer from the environment or the environment from the transformer if that makes sense.... basically are you wanting the transformer to withstand an explosion and carry on running or is it a potentially explosive environment.... or you just stopping potential injury if the transformer internally breaks down?

I posted a day ago had you included this info within your first post you would have got a quick useful answer in a couple of replies ....now im never going to get that lost time back ever :cry_smile:

 

[WilliamAng]

sorry for trouble everybody.

Btw thanks for your reply.

 

[Engineer54]

thanks for everyone reply.

i had checked with my end user, they going to use this transformer in the ship not chemical room.

they wanted the transformer to be complete with explosion proof enclosure.

they worry about internal explosion.

sorry for my mistake previously.

Same thing, you can't mount a dry transformer in an explosion-proof enclosure. It's still going to need a free or forced air flow for cooling purposes!!