ABB REG316 4 Series - Frequency Protection

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-191
3.5.18. Frequency protection (Frequency)
A. Application
· Under and overfrequency
· Load-shedding.
B. Features
· measurement of one voltage
· frequency calculation based on the complex voltage vector
· insensitive to DC component
· insensitive to harmonics
· undervoltage blocking.
C. Inputs and outputs
I. C.t./v.t. inputs:
· voltage
II. Binary inputs:
· blocking
III. Binary outputs:
· undervoltage blocking
· start
· trip
IV. Measurements:
· frequency
· voltage.