ABB Relion 620 Series - Page 302

Figure 150: Operating zones at minimum magnitude levels
Level detector
The measured phase currents are compared phasewise to the set Start value . If the
measured value exceeds the set Start value ,the level detector reports the exceeding
of the value, together with the directional results of that phase, to the phase
selection logic. If the ENA_MULT input is active, the Start value setting is multiplied
by the Start value Mult setting.
The IED does not accept the
Start value or Start value Mult setting if the
product of these settings exceeds the Start value setting range.
The start value multiplication is normally done when the inrush detection function
(INRPHAR) is connected to the ENA_MULT input.
Protection functions
1MRS757644 H
302 620 series
Technical Manual