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Chapter 8: Application Examples
Delta-Y impedance circuit transformation
Transformation of a Y impedance circuit to an equivalent Delta impedance
circuit and vice versa.
The Delta-Y transformation is defined by the following formula:
Z2
R1
R
Z1 = —
R2
R
Z2 = —
R3
R
Z3 = —
R1
Z1
Z3
where R = R1R2 + R2R3 + R3R1
1.
2.
Z1 Z2
R1 = ———
Z
Z 2 Z3
R2 = ———
Z
Z 3 Z1
R3 = ———
Z
R2
R3
where Z = Z1 + Z2 + Z3
Press b 2 1 0 to open a window for creating a NEW
program.
Type DELTAY for the title then press e.
• A NEW program called ‘DELTAY’ will be created.
3.
Enter the program as follows.
Program code
Key operations
Print”(1)DELTA TO Y
i 1 ( 1 ) @ a
DELTA s TO s Y ; e
Print”(2)Y TO DELTA
i 1 ( 2 ) @ a Y
s TO s DELTA ; e
Input X
i 2 ; X e
If X=1 Goto DTOY
i 8 ; X ; = 1 ;
s i 9 @ a DTOY
; e
If X=2 Goto YTOD
i 8 ; X ; = 2 ;
s i 9 @ a YTOD
; e
Label DTOY
i 6 @ a DTOY ;
e
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