ABB REG316 4 Series - Rotor Overload

REG 316*4 1MRB520049-Uen / Rev. F ABB Switzerland Ltd
3-185
3.5.17. Rotor overload (OLoad-Rotor)
A. Application
Overload protection for the rotors of large generators.
B. Features
· delay inversely proportional to overload (see Fig. 3.5.17.1)
· operating characteristic according to ASA-C50.13 (American
Standard Requirements for Cylindrical-Rotor Synchronous
Generators) with extended setting range
· adjustable rate of counting backwards when the overload
disappears (cooling rate of thermal image)
· three-phase measurement
· current measurement
· three-phases of AC excitation supply
· evaluation of the sum of the three phases (instantaneous
values without digital filtering).
C. Inputs and outputs
I. Analogue inputs:
· current
II. Binary inputs:
· blocking
III. Binary outputs:
· pick-up
· tripping
IV. Measurements:
· current amplitude.