Rotor Overload - ABB REG316 4 Series Operating Instructions Manual

REG 316*4 1MRB520049-Uen / Rev. F
3.5.17. Rotor overload (OLoad-Rotor)
A. Application
Overload protection for the rotors of large generators.
B. Features
· delay inversely proportional to overload
· 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
C. Inputs and outputs
I. Analogue inputs:
·
II. Binary inputs:
·
III. Binary outputs:
·
·
IV. Measurements:
·
values without digital filtering).
current
blocking
pick-up
tripping
current amplitude.
ABB Switzerland Ltd
(see Fig. 3.5.17.1)
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