ABB RELION 620 Series Technical Manual page 165

1MAC504801-IB E
620 series ANSI
Technical Manual
A070552-ANSI V1 EN
Figure 68: Functional module diagram. I_A, I_B and I_C represent phase currents.
Level detector
The measured phase currents are compared phasewise to the set Pickup value. If the
measured value exceeds the set Pickup value, the level detector reports the exceeding of
the value to the phase selection logic. If the ENA_MULT input is active, the Pickup value
setting is multiplied by the Pickup value Mult setting.
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 69: Pickup value behavior with ENA_MULT input activated
Section 4
Protection functions
159