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Antique Radio Technical Forum
rating of transformer at 2 volt amps

Posted by Lewis L on 07/10/2009 10:41

:Lewis L.,
:
:Technically shouldn't the transformers power factor be taken into consideration in figuring the transformer's power using its VA rating?
:
:Radiodoc
:*****************
:
Radiodoc:
Using a purely resistive load, the Wattage and the VA are the same. The manufacturer uses VA as he has no control over what kind of load you are going to connect it to. Into a resistive or inductive load, a Voltmeter and an Ammeter will read totally higher VA than a Wattmeter, do to the phase difference between the Voltage and the current.
Lewis
:::Here are the exact specifications:
:::120v 60hz / 17v 2.5va Smallwood BTX-1389 class 2
::
::P=ExI, so I=P/E, or I=2.5/17, or I=.147 A, or 147mA of current.
::
::Lewis


rating of transformer at 2 volt amps 
Robert 07/03/2009 14:47 
Bob Masse 07/03/2009 15:13 
Doug Criner 07/03/2009 15:22 
Robert 07/03/2009 15:53 
Lewis L 07/03/2009 16:19 
Robert 07/03/2009 16:25 
Lewis L 07/03/2009 17:59 
Doug Criner 07/03/2009 21:11 
Doug Criner 07/03/2009 21:37 
Lewis L 07/04/2009 13:35 
Robert 07/04/2009 20:01 
Doug Criner 07/05/2009 09:38 
Robert 07/05/2009 21:29 
Lewis L 07/05/2009 10:38 
Lewis L 07/05/2009 10:39 
Edd 07/05/2009 13:17 
Doug Criner 07/05/2009 14:52 
Lewis L 07/05/2009 18:58 
Lewis L 07/05/2009 19:58 
Lewis L 07/05/2009 19:58 
Lewis L 07/05/2009 20:01 
Radiodoc 07/09/2009 22:17 
Lewis L 07/10/2009 10:41 
Lewis L 07/10/2009 11:16 
Doug Criner 07/10/2009 16:41 
Radiodoc 07/10/2009 16:46 

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