ABB CVQ - Page 11

CVQ Relay 41-223N
11
Figure 6. Test Diagram for Type CVQ Relay
1482B82
Sub 1
A
CB
X
SUPPLY VOLTAGE IS 120V 3
∅
WITH A-B-C PHASE ROTATION REPRESENTED BY TRIANGLE ABC RELAY TEST VOLTAGE IS REPRESENTED BY TRIANGLE XBC
PHASOR DIAGRAM FOR TEST CONDITION
1
2
3
4
5
6
7
8
9
10
A
B
C
V
VARIABLE
AUTO
TRANSFORMER
120V 3
∅
A-B-C ROTATION
TYPE CVQ RELAY
(FRONT VIEW)
V
AX
= 3 TIMES NEGATIVE SEQUENCE
VOLTAGE V
2
V
2
= V
AX
x
3