GE 489 Instruction Manual page 109
Generator management relay
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4 SETPOINTS
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 1193.2 1392.0 1590.9 1789.7 1988.6 2187.5 2386.3 2585.2 2784.1 2982.9
1.30
126.80 253.61 380.41 507.22 634.02 760.82 887.63 1014.4 1141.2 1268.0 1394.8 1521.6 1648.5 1775.3 1902.1
1.40
91.14
182.27 273.41 364.55 455.68 546.82 637.96 729.09 820.23 911.37 1002.5 1093.6 1184.8 1275.9 1367.0
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
GE Multilin
STANDARD CURVE MULTIPLIERS
× 4
× 5
× 6
× 7
17414
21768
26122
30475
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
---------------------------------------------------------------------------------------------------------------------------------------------------- -
=
(
Pickup 1
×
0.02530337
–
489 Generator Management Relay
× 8
× 9
× 10
× 11
34829
39183
43536
47890
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
100.60 109.75 118.89 128.04 137.18
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
×
2
)
(
Pickup 1
×
0.05054758
–
+
4.10 S9 THERMAL MODEL
× 12
× 13
× 14
× 15
52243
56597
60951
65304
10245
11098
11952
12806
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
(EQ 4.28)
)
4-59
4
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