t [s] operate time in seconds
U measured voltage
U> the set value of
Start value
k the set value of
Time multiplier
Table 1060: Curve coefficients for the standard overvoltage IDMT curves
Curve name A B C D E
(17) Inverse Curve A 1 1 0 0 1
(18) Inverse Curve B 480 32 0.5 0.035 2
(19) Inverse Curve C 480 32 0.5 0.035 3
General function block features 1MRS757644 H
1156 620 series
Technical Manual
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