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7UT51 v3
9
8
7
6
5
4
3
2
1
87M Min
(1703)
0
0
Differential Protection Characteristic for a Motor or Generator
Figure 5.3
PRIM-2330C
' I
' I
2
1
G/M
7UT51
= ' + '
I
I
I
1
2
diff
= ' + '
I
I
I
1
2
rest
Operate Area
1
2
3
4
Restraining Current,
Motor or Generator Differential Protection (87M/G)
Through-Fault Restraint Area
( slope = 1/2 of 1706, left edge = 1718,
duration = 1717 )
5
6
7
I
( in multiples of
rest
Non-Operate Area
8
9
10
11
I
)
n
5
73
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