Ioc 2.691 A=Ioc
Voc
RSE
a2
jX
SE
⋅
a2
+1
1
RC
1
jX
M
⋅
+
+
:=
turns ratio
a10:=
These, of course, are estimates. A more accurate result:
Psc 3.26 103
×W=Psc Isc
()
2RSE
⋅:=
And the short circuit power:
Vsc 3.406 103
×V=Vsc Isc RSE jX
SE
⋅+
()
⋅:=
And the short circuit voltage:
Poc 720W=Poc
Voc
()
2
RC
:=
Then the open circuit power:
Ioc 3.1 A=Ioc Voc
1
RC
j1
XM
⋅−
⋅:=
Now calculate the other parameters. First, the open circuit current:
Rated current on the high voltage (low current)
side of the transformer
Isc 2.083 A=Isc
50 kV⋅A⋅
24 kV⋅
:=
Rated voltage on the low voltage side
Voc 240 V⋅:=
j1−:=
Estimate what the values of the open circuit test data and the short circuit test data should be.
Use rated low-side voltage on the open circuit test and rated high-side current on the short circuit
testl
XM307 ohm⋅:=RC80 ohm⋅:=XSE 1452 ohm⋅:=RSE 751ohm:=
A transformer rated at 50kVA with rated voltages of 24kV : 240V has the following equivalent
circuit parameters:
