ABB REG316 4 Series - Definite Time over and Undervoltage

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-117
3.5.11. Definite time over and undervoltage (Voltage-DT)
A. Application
General voltage monitoring (over and under).
Specific applications are:
· stator earth fault protection (95%)
· rotor earth fault protection (with ancillary unit YWX 111)
· interturn protection.
B. Features
· insensitive to DC component
· insensitive to harmonics
· single or three-phase measurement
· highest or lowest phase value detection in the three-phase
mode.
C. Inputs and outputs
I. Analogue inputs:
· voltage
II. Binary inputs:
· blocking
III. Binary outputs:
· pick-up
· tripping
IV. Measurements:
· voltage amplitude.