415V PCB mount transformer

K

KingKrak

New Member

• Dec 23, 2009

• #1

Hey,
Does anyone know where to get a 415V PCB mounted transformer from? Heck, it doesn't even need to be 415V, it could be 400V or even 380V! The output voltage needs to be around 18V to 50V. I only need 1VA.

I need it for a 15V control power circuit. It's very easy to get 240V transformers (single phase), but my incoming supply is 3 phase.

Thanks

 

M

mneary

New Member

• Dec 23, 2009

• #2

Can't you just use one phase to neutral? That would be pretty close to 240V.

 

K

KingKrak

New Member

• Dec 23, 2009

• #3

A lot of 3 phase cables don't come with a neutral - the ones in this application definitely won't. I'm pretty sure I can't use the earth in the cable because that will probably trip any earth leakage/RCDs that are present.

 

M

mneary

New Member

• Dec 24, 2009

• #4

Have you considered two transformers, with primaries in series and secondaries in parallel?

 

K

KingKrak

New Member

• Dec 24, 2009

• #5

No, I didn't think about that. Unfortunately, that won't really work for me. If I add a second transformer the circuit board will be too big and it will kind of blow out the cost of the board. As it is the transformer is the most expensive component on the board. We're going to be making a few thousand of these, and that extra $5 to $10 is going to add up to a lot of money.

 

S

shortbus=

Well-Known Member

Most Helpful Member

• Dec 25, 2009

• #6

Building that quantity you should look into a custom wound transformer.
check with these guy's; Antek - Your reliable source of transformers, power supplies, and more.

They seem to be pretty decent price wise and used to do custom/small orders. It's worth the time of a few Emails.

Cary