ABB REG316 4 Series - Generator Differential

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-53
3.5.2. Generator differential (Diff-Gen)
A. Application
Differential protection of generators.
B. Features
· non-linear current-dependent tripping characteristic
(see Fig. 3.5.2.1)
· high stability during through-faults and c.t. saturation
· short operating times
· three-phase measurement
· optimised for the differential protection of generators, i.e.
· no inrush restraint
· no compensation of group of connection
· only two measuring inputs
· suppression of DC off-set
· suppression of harmonics.
C. Inputs and outputs
I. Analogue inputs:
· current (2 sets of 3 inputs)
II. Binary inputs:
· blocking
III. Binary outputs:
· tripping
· R phase trip
· S phase trip
· T phase trip
IV. Measurements:
· R phase summation current
· S phase summation current
· T phase summation current