Siemens 7UT51 Instruction Manual page 70

5
Motor or Generator Differential Protection (87M/G)
Figure 5.1 Typical CT Wiring for a Longitudinal
Secondary
Figure 5.2 Typical CT Wiring for a Transverse
70
Prim ary
A B C
Secondary
-
Winding Motor/Generator
Primary
-
Winding Motor or Generator
I
3 A1
A
I
2 A1
B
I
1 A1
C
I
3 B1
A
I
2 B1
B
I
1 B1
C
7 U T 51 R e la y
3A1
2A1
1A1
A
B
C
3B1
2B1
1B1
7UT51 Relay
3 A2
2 A2
1 A2
3 B2
2 B2
1 B2
3A2
2A2
1A2
3B2
2B2
1B2
PRIM-2330C
7UT51 v3