GE 489 Instruction Manual page 93
Generator management relay
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4 SETPOINT PROGRAMMING
Table 4–7: 489 STANDARD OVERLOAD CURVE MULTIPLIERS
PICKUP
LEVEL
× 1
× 2
× 3
1.01
4353.6 8707.2
13061
1.05
853.71 1707.4 2561.1 3414.9 4268.6 5122.3 5976.0 6829.7 7683.4 8537.1 9390.8
1.10
416.68 833.36 1250.0 1666.7 2083.4 2500.1 2916.8 3333.5 3750.1 4166.8 4583.5 5000.2 5416.9 5833.6 6250.2
1.20
198.86 397.72 596.58 795.44 994.30
1.30
126.80 253.61 380.41 507.22 634.02 760.82 887.63 1014.4
1.40
91.14
182.27 273.41 364.55 455.68 546.82 637.96 729.09 820.23
1.50
69.99
139.98 209.97 279.96 349.95 419.94 489.93 559.92 629.91 699.90 769.89 839.88 909.87 979.86 1049.9
1.75
42.41
84.83
127.24 169.66 212.07 254.49 296.90 339.32 381.73 424.15 466.56 508.98 551.39 593.81 636.22
2.00
29.16
58.32
87.47
2.25
21.53
43.06
64.59
2.50
16.66
33.32
49.98
2.75
13.33
26.65
39.98
3.00
10.93
21.86
32.80
3.25
9.15
18.29
27.44
3.50
7.77
15.55
23.32
3.75
6.69
13.39
20.08
4.00
5.83
11.66
17.49
4.25
5.12
10.25
15.37
4.50
4.54
9.08
13.63
4.75
4.06
8.11
12.17
5.00
3.64
7.29
10.93
5.50
2.99
5.98
8.97
6.00
2.50
5.00
7.49
6.50
2.12
4.24
6.36
7.00
1.82
3.64
5.46
7.50
1.58
3.16
4.75
8.00
1.39
2.78
4.16
10.00
1.39
2.78
4.16
15.00
1.39
2.78
4.16
20.00
1.39
2.78
4.16
Above 8.0 × Pickup, the trip time for 8.0 is used. This prevents the overload curve from acting as an instan-
taneous element.
NOTE
The standard overload curves equation is:
Time to Trip
=
---------------------------------------------------------------------------------------------------------------------------------------------------- -
0.02530337
GE Power Management
STANDARD CURVE MULTIPLIERS
× 4
× 5
× 6
× 7
17414
21768
26122
30475
1193.2 1392.0 1590.9 1789.7 1988.6 2187.5 2386.3 2585.2 2784.1 2982.9
116.63 145.79 174.95
204.11 233.26 262.42 291.58 320.74 349.90 379.05 408.21 437.37
86.12
107.65 129.18 150.72 172.25 193.78 215.31 236.84 258.37 279.90 301.43 322.96
66.64
83.30
99.96
116.62 133.28 149.94 166.60 183.26 199.92 216.58 233.24 249.90
53.31
66.64
79.96
93.29
43.73
54.66
65.59
76.52
36.58
45.73
54.87
64.02
31.09
38.87
46.64
54.41
26.78
33.47
40.17
46.86
23.32
29.15
34.98
40.81
20.50
25.62
30.75
35.87
18.17
22.71
27.25
31.80
16.22
20.28
24.33
28.39
14.57
18.22
21.86
25.50
11.96
14.95
17.94
20.93
9.99
12.49
14.99
17.49
8.48
10.60
12.72
14.84
7.29
9.11
10.93
12.75
6.33
7.91
9.49
11.08
5.55
6.94
8.33
9.71
5.55
6.94
8.33
9.71
5.55
6.94
8.33
9.71
5.55
6.94
8.33
9.71
×
Curve Multiplier
2.2116623
(
)
2
×
Pickup 1
–
+
0.05054758
489 Generator Management Relay
× 8
× 9
× 10
× 11
34829
39183
43536
47890
1141.2 1268.0 1394.8 1521.6 1648.5 1775.3 1902.1
911.37 1002.5 1093.6
106.62
119.95 133.27 146.60 159.93 173.25 186.58 199.91
87.46
98.39
109.32 120.25 131.19 142.12 153.05 163.98
73.16
82.31
91.46
100.60 109.75
62.19
69.96
77.73
85.51
53.56
60.25
66.95
73.64
46.64
52.47
58.30
64.13
41.00
46.12
51.25
56.37
36.34
40.88
45.42
49.97
32.44
36.50
40.55
44.61
29.15
32.79
36.43
40.08
23.91
26.90
29.89
32.88
19.99
22.48
24.98
27.48
16.96
19.08
21.20
23.32
14.57
16.39
18.21
20.04
12.66
14.24
15.82
17.41
11.10
12.49
13.88
15.27
11.10
12.49
13.88
15.27
11.10
12.49
13.88
15.27
11.10
12.49
13.88
15.27
(
)
×
Pickup 1
–
4.10 S9 THERMAL MODEL
× 12
× 13
× 14
× 15
52243
56597
60951
65304
10245
11098
11952
12806
1184.8
1275.9 1367.0
118.89
128.04 137.18
93.28
101.05 108.83
116.60
80.34
87.03
93.73
100.42
69.96
75.79
81.62
87.45
61.50
66.62
71.75
76.87
54.51
59.05
63.59
68.14
48.66
52.72
56.77
60.83
43.72
47.36
51.01
54.65
35.87
38.86
41.85
44.84
29.98
32.48
34.97
37.47
25.44
27.55
29.67
31.79
21.86
23.68
25.50
27.32
18.99
20.57
22.15
23.74
16.65
18.04
19.43
20.82
16.65
18.04
19.43
20.82
16.65
18.04
19.43
20.82
16.65
18.04
19.43
20.82
4-55
4
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