Alstom SHPM 101 - Board ZH0730 Phase and Neutral and IR Setting

SERVICE MANUAL R5888C
QUADRAMHO Chapter 2
Appendix A
Page 10 of 71
Figure 10: Board ZH0730 phase and neutral and IR setting
K2(a) FINE SETTING
K1(a) COARSE SETTING
K2(b) FINE SETTING
K1(b) COARSE SETTING
K2(c) FINE SETTING
K1(c) COARSE SETTING
LDI
A
– LDI
B
– LDI
C
I
A
1
I
A
2
I
B
1
I
B
2
I
C
1
I
C
2
I
N
2
I
N
3
–I
A
Z
PH
–I
A
Z
PH
I
A
COMMON
I
N
COMMON
I
C
COMMON
I
B
COMMON
IR
C
COMMON
IR
C
V
C
COMMON
SC
K3(a) RESISTIVE REACH
(V + IR)
A
V
A
COMMON
(V – IR)
A
V
A'
CIRCUIT BELOW APPLIES TO QUADRILATERAL RELAY ONLY
IR
A
COMMON
SIG COMMON
0v
–12V
+12V
K4 COARSE SETTING
K5 FINE SETTING
K6 VERY FINE SETTING
– I
N
Z
N
– I
C
Z
PH
–I
B
Z
PH
–I
B
Z
PH
MIXING
AND
SQUARING
FOR
PHASE
A
MIXING
AND
SQUARING
FOR
PHASE
B
MIXING
AND
SQUARING
FOR
PHASE
C
I
N
1
– I
C
Z
PH
+
-
+
-
+
-
IR'
A
G
V
A
CP
RESISTIVE
REACH
RESISTIVE
REACH
V
B'
V
B
COMMON
V
B
CP
IR
B
IR
B
COMMON
V
C'
V
C
CP
K3(b)–
K3(c)–
(IR)
A
(IR)
N
(V + IR)
B
(V – IR)
B
(IR)
B
(V + IR)
C
(V – IR)
C
(IR)
C
IR
A