Overfluxing - ABB REG316 4 Series Operating Instructions Manual

REG 316*4 1MRB520049-Uen / Rev. F
3.5.20. Overfluxing (Overexcitat)
A. Application
Protection of generators and power transformers against ex-
cessive flux.
B. Features
· evaluation of the voltage/frequency ratio
· single-phase measurement
· definite time delay
· determination of frequency from the complex voltage vector
· insensitive to DC components
· insensitive to harmonics
· over or underexcitation mode.
C. Inputs and outputs
I. C.t./v.t. inputs:
·
II. Binary inputs:
·
III. Binary outputs:
·
·
IV. Measurements:
·
·
voltage
blocking
pick-up
tripping
voltage/frequency
frequency.
ABB Switzerland Ltd
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