Finding VARS and PF for open and short circuit test
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Finding VARS and PF for open and short circuit test

[From: ] [author: ] [Date: 11-10-18] [Hit: ]
For Open Circuit,V=104.I=1.V=4.I=10.P=44W-First,......
Okay, so I'm doing the open and short circuit test and have these values:
Voltage, current and Power.
How do I find the volt-amps reactive and power factor?
Are there different methods for the open/short circuit test?
For Open Circuit, my values were:
V=104.1
I=1.91 A
P=32 W
For short circuit:
V=4.6
I=10.42
P=44W

-
First, what is your device? I assume it is transformer, then you need variable n=Vprimary/V secondary. but it is not provided. suppose n is known variable hen Voc=Vopencircuit=> Z ext = V/I
Rexc=Poc/(Ioc^2); then Xexc=sqrt(Z^2-r^2). You can find the R at secondary by R2=Psc/(Isc^2) the Z2=Vsc/Isc. Z system is known as Zexc//Z2. find angle of Z. from there VAR is found as Vt xI(L) x sin(angle of Z) and PF as cos (angle of Z)
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