240v supply from 415V ?
I have an electrical panel supplied with 415V, 3 phase and earth, no
neutral. I need to have a 240v powered switch mode PSU installed in the same panel. Can it be done without a neutral? Thanks |
240v supply from 415V ?
On 24 Mar, 18:51, BodgeIt wrote:
I have an electrical panel supplied with 415V, 3 phase and earth, no neutral. *I need to have a 240v powered switch mode PSU installed *in the same panel. Can it be done without a neutral? Thanks I suggest a 400/230 volt transformer to power the PSU. You may need to earth one leg of the 230 volt output to provide a neutral depending on the requirements of the PSU. |
240v supply from 415V ?
BodgeIt wrote:
I have an electrical panel supplied with 415V, 3 phase and earth, no neutral. I need to have a 240v powered switch mode PSU installed in the same panel. Can it be done without a neutral? Thanks Yes, but you would need to buy a 415v/230V transformer. An autotransformer will do and may be cheaper than an isolating transformer, but you are more likely to get 415V to 110V, so check if your switch mode is dual voltage. If the power is 50VA or less, you could use eBay item 170461492064 link to eBay: http://preview.tinyurl.com/ycnas4d Connect the primary of the transformer between any two 415V phases with a 2-phase MCB, e.g. http://www.tlc-direct.co.uk/Products/CM9806D.html |
240v supply from 415V ?
Thanks for your advice, I hadn't even thought about a step down
transformer having got so focused on going across a phase and my non existent neutral. Cheers On Wed, 24 Mar 2010 20:11:17 +0000, Dave Osborne wrote: BodgeIt wrote: I have an electrical panel supplied with 415V, 3 phase and earth, no neutral. I need to have a 240v powered switch mode PSU installed in the same panel. Can it be done without a neutral? Thanks Yes, but you would need to buy a 415v/230V transformer. An autotransformer will do and may be cheaper than an isolating transformer, but you are more likely to get 415V to 110V, so check if your switch mode is dual voltage. If the power is 50VA or less, you could use eBay item 170461492064 link to eBay: http://preview.tinyurl.com/ycnas4d Connect the primary of the transformer between any two 415V phases with a 2-phase MCB, e.g. http://www.tlc-direct.co.uk/Products/CM9806D.html |
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