I Measured current
I> Set
Start value
Table 1653: Coefficients for ANSI delayed inverse reset curves
Curve name D
(1) ANSI Extremely Inverse 29.1
(2) ANSI Very Inverse 21.6
(3) ANSI Normal Inverse 0.46
(4) ANSI Moderately Inverse 4.85
(6) Long Time Extremely Inverse 30
(7) Long Time Very Inverse 13.46
(8) Long Time Inverse 4.6
The delayed inverse reset time depends also on the protection function's start
duration value START_DUR. The reset time on the drop-off moment can be
calculated by multiplying t[s] with START_DUR.
1MRS759142 F
General function block features
REX640
Technical Manual
1887
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