GE T35 - Page 358

5-156 T35 TRANSFORMER PROTECTION SYSTEM – INSTRUCTION MANUAL
SYSTEM SETUP CHAPTER 5: SETTINGS
5
In our example, the following phase and zero-sequence compensation equations would be used:
For Winding 1:
Eq. 5-19
For Winding 2:
Eq. 5-20
5.5.4.7 Magnitude, phase angle, and zero sequence compensation
Complete magnitude, phase angle, and zero sequence compensation is as follows:
I
A
c
[w] = M [w] x I
A
p
[w], where w = 1, 2, ..., w
total
Eq. 5-21
I
B
c
[w] = M [w] x I
B
p
[w], where w = 1, 2, ..., w
total
Eq. 5-22
I
C
c
[w] = M [w] x I
C
p
[w], where w = 1, 2, ..., w
total
Eq. 5-23
where
I
A
c
[w], I
B
c
[w], and I
C
c
[w] = magnitude, phase, and zero-sequence compensated winding w phase currents
M [w] = magnitude compensation factor for winding w (see previous sections)
I
A
p
[w], I
B
c
[w], and I
C
c
[w] = phase and zero sequence compensated winding w phase currents (see earlier)