ABB RED615 Technical Manual page 258

Section 4
Protection functions
252
When the thermal content reaches 100 percent, the OPERATE output is activated.
The OPERATE output is deactivated when the value of the measured current falls
below 12 percent of Rated current or the thermal content drops below 100 percent.
The activation of the BLOCK input blocks the ALARM, BLK_RESTART and
OPERATE outputs.
1YHT530004D05 D
615 series
Technical Manual