GE T35 UR Series

GE Multilin T35 Transformer Protection System 5-97
5 SETTINGS 5.4 SYSTEM SETUP
5
In our example, the following phase and zero-sequence compensation equations would be used:
For Winding 1:
;; (EQ 5.15)
For Winding 2:
;; (EQ 5.16)
g) MAGNITUDE, PHASE ANGLE, AND ZERO SEQUENCE COMPENSATION
Complete magnitude, phase angle, and zero sequence compensation is as follows:
(EQ 5.17)
(EQ 5.18)
(EQ 5.19)
where: , , and = magnitude, phase and zero sequence compensated winding w phase currents
= magnitude compensation factor for winding w (see previous sections)
, , and = phase and zero sequence compensated winding w phase currents (see earlier)
240° lag
270° lag
300° lag
330° lag
Table 5–7: PHASE AND ZERO SEQUENCE COMPENSATION FOR TYPICAL VALUES OF Φ
comp
Φ
comp
[w] Grounding[w] = “Not within zone” Grounding[w] = “Within zone”
I
A
p
w[] I
C
w[]=
I
B
p
w[] I
A
w[]=
I
C
p
w[] I
B
w[]=
I
A
p
w[]
2
3
---
I
C
w[]
1
3
---
I
A
w[]–
1
3
---
I
B
w[]–=
I
B
p
w[]
2
3
---
I
A
w[]
1
3
---
I
B
w[]–
1
3
---
I
C
w[]–=
I
C
p
w[]
2
3
---
I
B
w[]
1
3
---
I
A
w[]–
1
3
---
I
C
w[]–=
I
A
p
w[]
1
3
-------
I
C
w[]
1
3
-------
I
B
w[]–=
I
B
p
w[]
1
3
-------
I
A
w[]
1
3
-------
I
C
w[]–=
I
C
p
w[]
1
3
-------
I
B
w[]
1
3
-------
I
A
w[]–=
I
A
p
w[]
1
3
-------
I
C
w[]
1
3
-------
I
B
w[]–=
I
B
p
w[]
1
3
-------
I
A
w[]
1
3
-------
I
C
w[]–=
I
C
p
w[]
1
3
-------
I
B
w[]
1
3
-------
I
A
w[]–=
I
A
p
w[] I
B
w[]–=
I
B
p
w[] I
C
w[]–=
I
C
p
w[] I
A
w[]–=
I
A
p
w[]
2
3
---
I
B
w[]–
1
3
---
I
A
w[]
1
3
---
I
C
w[]++=
I
B
p
w[]
2
3
---
I
C
w[]–
1
3
---
I
A
w[]
1
3
---
I
B
w[]++=
I
C
p
w[]
2
3
---
I
A
w[]–
1
3
---
I
B
w[]
1
3
---
I
C
w[]++=
I
A
p
w[]
1
3
-------
I
A
w[]
1
3
-------
I
B
w[]–=
I
B
p
w[]
1
3
-------
I
B
w[]
1
3
-------
I
C
w[]–=
I
C
p
w[]
1
3
-------
I
C
w[]
1
3
-------
I
A
w[]–=
I
A
p
w[]
1
3
-------
I
A
w[]
1
3
-------
I
B
w[]–=
I
B
p
w[]
1
3
-------
I
B
w[]
1
3
-------
I
C
w[]–=
I
C
p
w[]
1
3
-------
I
C
w[]
1
3
-------
I
A
w[]–=
I
A
p
1[]
2
3
---
I
A
1[]
1
3
---
I
B
1[]–
1
3
---
I
C
1[]–=
I
B
p
1[]
2
3
---
I
B
1[]
1
3
---
I
A
1[]–
1
3
---
I
C
1[]–=
I
C
p
1[]
2
3
---
I
C
1[]
1
3
---
I
A
1[]–
1
3
---
I
B
1[]–=
I
A
p
w[]
1
3
-------
I
A
2[]
1
3
-------
I
B
2[]–=
I
B
p
w[]
1
3
-------
I
B
2[]
1
3
-------
I
C
2[]–=
I
C
p
w[]
1
3
-------
I
C
2[]
1
3
-------
I
A
2[]–=
I
A
c
w[] Mw[] I
A
p
w[]×= , where w 12… w
total
,, ,=
I
B
c
w[] Mw[] I
B
p
w[]×= , where w 12… w
total
,, ,=
I
C
c
w[] Mw[] I
C
p
w[]×= , where w 12… w
total
,, ,=
I
A
c
w[]
I
B
c
w[]
I
C
c
w[]
Mw[]
I
A
p
w[]
I
B
c
w[]
I
C
c
w[]