GE 489 Portable Generator User Manual


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GE Multilin 489 Generator Management Relay 4-59
4 SETPOINTS 4.10 S9 THERMAL MODEL
4
Above 8.0 × Pickup, the trip time for 8.0 is used. This prevents the overload curve from acting as an instan-
taneous element.
The standard overload curves equation is:
(EQ 4.28)
Table 4–7: 489 STANDARD OVERLOAD CURVE MULTIPLIERS
PICKUP
LEVEL
STANDARD CURVE MULTIPLIERS
× 1 × 2 × 3 × 4 × 5 × 6 × 7 × 8 × 9 × 10 × 11 × 12 × 13 × 14 × 15
1.01 4353.6 8707.2 13061 17414 21768 26122 30475 34829 39183 43536 47890 52243 56597 60951 65304
1.05 853.71 1707.4 2561.1 3414.9 4268.6 5122.3 5976.0 6829.7 7683.4 8537.1 9390.8 10245 11098 11952 12806
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 87.47 116.63 145.79 174.95 204.11 233.26 262.42 291.58 320.74 349.90 379.05 408.21 437.37
2.25 21.53 43.06 64.59 86.12 107.65 129.18 150.72 172.25 193.78 215.31 236.84 258.37 279.90 301.43 322.96
2.50 16.66 33.32 49.98 66.64 83.30 99.96 116.62 133.28 149.94 166.60 183.26 199.92 216.58 233.24 249.90
2.75 13.33 26.65 39.98 53.31 66.64 79.96 93.29 106.62 119.95 133.27 146.60 159.93 173.25 186.58 199.91
3.00 10.93 21.86 32.80 43.73 54.66 65.59 76.52 87.46 98.39 109.32 120.25 131.19 142.12 153.05 163.98
3.25 9.15 18.29 27.44 36.58 45.73 54.87 64.02 73.16 82.31 91.46 100.60 109.75 118.89 128.04 137.18
3.50 7.77 15.55 23.32 31.09 38.87 46.64 54.41 62.19 69.96 77.73 85.51 93.28 101.05 108.83 116.60
3.75 6.69 13.39 20.08 26.78 33.47 40.17 46.86 53.56 60.25 66.95 73.64 80.34 87.03 93.73 100.42
4.00 5.83 11.66 17.49 23.32 29.15 34.98 40.81 46.64 52.47 58.30 64.13 69.96 75.79 81.62 87.45
4.25 5.12 10.25 15.37 20.50 25.62 30.75 35.87 41.00 46.12 51.25 56.37 61.50 66.62 71.75 76.87
4.50 4.54 9.08 13.63 18.17 22.71 27.25 31.80 36.34 40.88 45.42 49.97 54.51 59.05 63.59 68.14
4.75 4.06 8.11 12.17 16.22 20.28 24.33 28.39 32.44 36.50 40.55 44.61 48.66 52.72 56.77 60.83
5.00 3.64 7.29 10.93 14.57 18.22 21.86 25.50 29.15 32.79 36.43 40.08 43.72 47.36 51.01 54.65
5.50 2.99 5.98 8.97 11.96 14.95 17.94 20.93 23.91 26.90 29.89 32.88 35.87 38.86 41.85 44.84
6.00 2.50 5.00 7.49 9.99 12.49 14.99 17.49 19.99 22.48 24.98 27.48 29.98 32.48 34.97 37.47
6.50 2.12 4.24 6.36 8.48 10.60 12.72 14.84 16.96 19.08 21.20 23.32 25.44 27.55 29.67 31.79
7.00 1.82 3.64 5.46 7.29 9.11 10.93 12.75 14.57 16.39 18.21 20.04 21.86 23.68 25.50 27.32
7.50 1.58 3.16 4.75 6.33 7.91 9.49 11.08 12.66 14.24 15.82 17.41 18.99 20.57 22.15 23.74
8.00 1.39 2.78 4.16 5.55 6.94 8.33 9.71 11.10 12.49 13.88 15.27 16.65 18.04 19.43 20.82
10.00 1.39 2.78 4.16 5.55 6.94 8.33 9.71 11.10 12.49 13.88 15.27 16.65 18.04 19.43 20.82
15.00 1.39 2.78 4.16 5.55 6.94 8.33 9.71 11.10 12.49 13.88 15.27 16.65 18.04 19.43 20.82
20.00 1.39 2.78 4.16 5.55 6.94 8.33 9.71 11.10 12.49 13.88 15.27 16.65 18.04 19.43 20.82
NOTE
Time to Trip
Curve Multiplier 2.2116623×
0.02530337
Pickup 1–()
2
× 0.05054758
Pickup 1–()
×+
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