Timer input
OC_STR
OC_OPR
Reset timer
Operate timer
Reset delay time
Operate delay time
GUID-172943A9-F4AD-4B8A-A47F-E8BC032EE30D V1 EN
Figure 168:
Drop-off period is shorter than the set Reset delay time
When the drop-off period is shorter than the set Reset delay time, as described in
, 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
OC_STR
output and
the operate timer starts elapsing. The Reset (drop-off) timer starts when the timer input
falls, that is, the fault disappears. Another fault situation occurs before the reset (drop-
off) timer has elapsed. This causes the activation of the
OC_OPR
output, since the
operate timer already has elapsed.
If the
RESET_OC
(Overcurrent reset) input is activated when the operate timer is
running as described in
, the operate timer and the reset timer reset. It also
resets the
OC_STR
and
OC_OPR
outputs.
Section 9
1MRS757256 F
General function block features
322
PML630/Compact Load-Shedding Solution
Technical Manual
Содержание Relion 630 Series
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