Figure 375: Drop-off period is longer than the set Reset delay time
When the drop-off period is longer than the set
Reset delay time
, as described
in
Figure 375
, the input signal for the definite timer (here: timer input) is active,
provided that the current is above the set
Start value
. The input signal is inactive
when the current is below the set
Start value
and the set hysteresis region. The
timer input rises when a fault current is detected. The definite timer activates the
START output and the operate timer starts elapsing. The reset (drop-off) timer
starts when the timer input falls, that is, the fault disappears. When the reset (drop-
off) timer elapses, the operate timer is reset. Since this happens before another
start occurs, the OPERATE output is not activated.
1MRS758755 C
General function block features
REC615 & RER615
Technical Manual
741
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