Figure 625: Inverse-time characteristic curves for overload stage
If the integrated current exceeds 1.1 times the setting
Start value overload
for a
short period but does not operate as the current decreases within
Start value
overload
, the output ST_OVLOD is kept active but the operation timer is frozen.
However, if the integrated current exceeds 1.1 times the
Start value overload
setting value again, the operation timer continue from the freezing point. Thus, the
operation timer is cumulative. If the integrated current exceeds 1.1 times the setting
Start value overload
only once and remains within the
Start value overload
area for
24 hours, the operation timer and the output ST_OVLOD are reset.
1MRS759142 F
Protection functions
REX640
Technical Manual
1113
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