When the IDMT operate time curve is selected, the functionality of the Timer in the
drop-off state depends on the combination of the
Type of reset curve
,
Type of time
reset
and
Reset delay time
settings.
Table 440: Reset time functionality when IDMT operation time curve selected
Reset functionality Setting Type of
reset curve
Setting Type of
time reset
Setting Reset
delay time
Instantaneous
reset
Operation timer
is “Reset instan-
taneously” when
drop-off occurs
“Immediate” Setting has no
effect
Setting has no
effect
Frozen timer Operation timer
is frozen during
drop-off
“Def time reset” “Freeze Op tim-
er”
Operate timer is
reset after the
set
Reset delay
time
has elapsed
Linear decrease Operation timer
value linearly de-
creases during
the drop-off sit-
uation
“Def time reset” “Decrease Op
timer”
Operate timer is
reset after the
set
Reset delay
time
has elapsed
Protection functions 1MRS758755 C
430 REC615 & RER615
Technical Manual
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