Figure 9-6 Typical Vt And Ct Connections For Directional Sensitive Earth Fault Units - ABB DPU 1500R Instruction Book

9/99
USER SELECTABLE PHASE ROTATION
A-B-C (L1-L2-L3) or A-C-B (L1-L3-L2)
NORMAL
LOAD
FLOW
Figure 9-6. Typical VT and CT Connections for Directional Sensitive Earth Fault Units
Relay Installations
(L1) (L2) (L3)
0A 0B 0C
52
website:www.abb.com/papd
ABB Distribution Protection Unit 1500R
+ +
52 54
50
51 53
49
+
45 46
31
(UL1)
V
A
35
32
(UL2)
V
B
33
3V
(UL3) 0
V
C
34
(UN)
V
N
36
+
+
9-9