Panda Posted January 17, 2008 Report Share Posted January 17, 2008 I have been asked to confirm if a 1MVA transformer (11KV/400V) is suffient to supply our new premises. The old premises has a maximum demand of approximatley 390KW. It has been so long since i have done anything like this that i am not sure i am going about it the right way, could somebody please help. Link to comment Share on other sites More sharing options...
marke Posted January 17, 2008 Report Share Posted January 17, 2008 Hello Panda Welcome to the forum. If you have a power factor of 1.0, then 1MVA = 1MW = 1000KW If you have a power factor less than 1.0, the KW will be less than the KVA. KW = KVA x pf. If you load at the new premises is the same as the old, and if you power factor is greater than 0.4 then the transformer would be sufficient. Best regards, Mark Empson | administratorSkype Contact = markempson | phone +64 274 363 067LMPForum | Power Factor | L M Photonics Ltd | Empson family | Advanced Motor Control Ltd | Pressure Transducers | Smart Relay | GSM Control | Mark Empson Website | AuCom | Soft Starters Link to comment Share on other sites More sharing options...
Panda Posted May 6, 2008 Author Report Share Posted May 6, 2008 Marke Thanks very much for the advice, i was working on that priciple but with a PF of 0.8. I did not think i was to far off but it could be a costly mistake if i agreed and the transformer was undersized. Thanks again Panda Link to comment Share on other sites More sharing options...
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