
2-48
ALPS Advanced Line Protection System
GE Power Management
2.4 INVERSE CURVES
2 CALCULATION OF SETTINGS
2
2.4 INVERSE CURVES
Figure 2–18: INVERSE CURVE
0.01
0.1
1
10
100
0.1
1
10
100
MULTIPLES OF PICKUP
10
9
8
7
6
5
4
3
2
1
0.5
TIME
DIAL
TIME
(SECONDS)
−
=
2
1
97
0
M
.
TD
)
RESET
(
t
+
−
=
0228
0
1
0103
0
02
0
.
M
.
TD
)
PU
(
t
.