701 Motor Protection Relay
Date Code 20010719
Settings Calculation
Basic Motor Protection
4.14
Table 4.7 Generic Thermal Limit Curve Tripping Times From Reset versus Multiples of Full Load Amps, Curves 1–10 (Thermal Li mit Times in Seconds )
Table 4.7
Generic Thermal Limit Curve Tripping Times
From Reset versus
Multiples of Full Load Amps, Curves 1–10
(Thermal Limit Times in Seconds)
Curves
Multiples of
Full Load Amps
1 2 3 4 5 6 7 8 9 10
1.01 311.4 622.7 934.1 1245.4 1556.8 1868.1 2179.5 2490.8 2802.2 3113.6
1.10 138.9 277.7 416.6 555.4 694.3 833.1 972.0 1110.8 1249.7 1388.5
1.15 111.9 223.8 335.7 447.6 559.4 671.3 783.2 895.1 1007.0 1118.9
1.20 94.0 188.0 282.0 376.0 470.0 564.0 658.0 752.0 846.0 940.0
1.30 71.0 142.0 213.1 284.1 355.1 426.1 497.2 568.2 639.2 710.2
1.40 56.6 113.2 169.8 226.4 283.0 339.6 396.2 452.7 509.3 565.9
1.50 46.6 93.2 139.8 186.4 233.0 379.6 326.2 372.8 419.4 466.0
1.70 33.7 67.3 101.0 134.7 168.4 202.0 235.7 269.4 303.0 336.7
2.00 22.8 45.6 68.4 91.2 114.0 136.9 159.7 182.5 205.3 228.1
2.50 14.4 28.8 43.2 57.6 72.0 86.4 100.8 115.2 129.6 144.0
3.00 10.0 20.0 40.0 10.0 50.0 60.0 70.0 80.0 90.0 100.0
3.50 7.3 14.7 22.0 29.4 36.7 44.1 51.4 58.8 66.1 73.5
4.00 5.6 11.2 16.9 22.5 28.1 33.7 39.4 45.0 50.6 56.2
4.50 4.4 8.9 13.3 17.8 22.2 26.7 31.1 35.6 40.0 44.4
5.00 3.6 7.2 10.8 14.4 18.0 21.6 25.2 28.8 32.4 36.0
6.00 2.5 5.0 7.5 10.0 12.5 15.0 17.5 20.0 22.5 25.0
(Continued)
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