ABB RELION 620 Series Technical Manual page 781

1MRS757644 F
620 series
Technical Manual
Operate time is based on maximum value of I_PEAK_INT_A, I_PEAK_INT_B and
I_PEAK_INT_C. From maximum value calculated , operate time between any two
consecutive points in the standard table is based on logarithmic interpolation.
The operate time can be scaled using the Time multiplier setting. The OPR_OVLOD
output is activated if the overload situation lasts long enough to exceed the operation
time.
The operate time for the operation overload stage is limited between
0.1 s to 43200 s (12 hours) if Time multiplier is used.
Section 4
Protection functions
775