ABB Relion 620 Series - Page 277

Figure 135: 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 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 protection relay 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.
1MRS757644 H
Protection functions
620 series
Technical Manual
277