Date Code 20010719
701 Motor Protection Relay
Settings Calculation
Basic Motor Protection
4.15
Table 4.8 Generic Thermal Limit Curve Tripping Times From Reset versus Multiples of Full Load Amps, Curves 15, 20, 25, 30, 35, 40, 45 (Thermal Lim it T ime s 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) (Continued)
Curves
Multiples of
Full Load Amps
1 2 3 4 5 6 7 8 9 10
7.00 1.8 3.7 5.5 7.4 9.2 11.0 12.9 14.7 16.5 18.4
8.00 1.4 2.8 4.2 5.6 7.0 8.4 9.8 11.3 12.7 14.1
9.00 1.1 2.2 3.3 4.4 5.5 6.6 7.7 8.8 10.0 11.1
10.00 0.9 1.8 2.7 3.6 4.5 5.4 6.3 7.2 8.1 9.0
Table 4.8
Generic Thermal Limit Curve Tripping Times From Reset versus Multiples of
Full Load Amps, Curves 15, 20, 25, 30, 35, 40, 45 (Thermal Limit Times in Seconds)
Curves
Multiples of
Full Load Amps
15 20 25 30 35 40 45
1.01 4670.3 6227.1 7783.9 9340.7 10897.4 12454.2 14011.0
1.10 2082.8 2777.1 3471.3 4165.6 4859.9 5554.1 6248.4
1.15 1678.3 2237.8 2797.2 3356.7 3916.1 4475.6 5035.0
1.20 1410.1 1880.1 2350.1 2820.1 3290.2 3760.2 4230.2
1.30 1065.4 1420.5 1775.6 2130.7 2485.9 2841.0 3196.1
1.40 848.9 1131.9 1414.8 1697.8 1980.8 2263.7 2546.7
1.50 699.1 932.1 1165.1 1398.1 1631.2 1864.2 2097.2
(Continued)
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