GE M60 Instruction Manual page 253

5 SETTINGS
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
If "IEC" is selected as the thermal model curve, the M60 can apply the IEC 255-8 hot and cold curve characteristics to
the thermal model. The M60 will evaluate the thermal capacity at motor start and choose the appropriate curve. The
hot curve characteristic is applied when the thermal capacity is greater than or equal to 5% (that is, a point above
where the motor is not at complete rest, or cold). Otherwise, the cold curve characteristic is applied.
The IEC255-8 cold curve is defined as follows:
The IEC255-8 hot curve is defined as follows:
where:
– t = time to trip.
– τ = value of the
THERMAL MODEL TD MULTIPLIER
– I = measured motor load current.
– I = value of the
MOTOR FULL LOAD AMPS
p
– k = value of the
IEC CURVE K FACTOR
GE Multilin
M60 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

τ ×  ------------------------------ -
t ln
=
2

(
I k I
–
2

I
τ ×  ------------------------------ -
t ln
=
2

(
I k I
–
setting.
setting.
setting as applied to I
M60 Motor Protection System
× 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 
I

2

× )
b
2

I
–
p

2

× )
b
.
b
5.6 GROUPED ELEMENTS
× 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 5.8)
(EQ 5.9)
5-115
5