ABB 615 series Technical Manual page 242

Section 4
Protection functions
236
The protection relay does not accept the Pickup value or Pickup value
Mult setting if the product of these settings exceeds the Pickup value
setting range.
The pickup value multiplication is normally done when the inrush detection function
(INR) is connected to the ENA_MULT input.
GUID-640654EC-1E77-4ED5-BE41-9EC399B686BA-ANSI V1 EN
Figure 114: Pickup value behavior with ENA_MULT input activated
Phase selection logic
If the fault criteria are fulfilled in the level detector and the directional calculation, the
phase selection logic detects the phase or phases in which the measured current exceeds
the setting. If the phase information matches the Num of pickup phases setting, the phase
selection logic activates the timer module.
Timer
Once activated, the timer activates the PICKUP output. Depending on the value of the
Operating curve type setting, the time characteristics are according to DT or IDMT. When
the operation timer has reached the value of Trip delay time in the DT mode or the
maximum value defined by the inverse time curve, the TRIP output is activated.
1MAC059074-MB A
615 series ANSI
Technical Manual