REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-65
3.5.4. Peak value overcurrent (Current-Inst)
A. Application
· General current monitoring with instantaneous response (over
and undercurrent)
· Current monitoring where insensitivity to frequency is
required (over and undercurrent).
B. Features
· processes instantaneous values and is therefore fast and
largely independent of frequency
· stores the peak value following pick-up
· no suppression of DC component
· no suppression of harmonics
· single or three-phase measurement
· maximum value detection in the three-phase mode
· adjustable lower frequency limit f
min
.
C. Inputs and outputs
I. C.t./v.t. inputs
· current
II. Binary inputs
· blocking
III. Binary outputs
· pick-up
· tripping
IV. Measurements
· current amplitude (only available if function trips).
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