ABB REG316 4 Series - Overfluxing

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-201
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:
· voltage
II. Binary inputs:
· blocking
III. Binary outputs:
· pick-up
· tripping
IV. Measurements:
· voltage/frequency
· frequency.