ABB REG316 4 Series Operating Instructions Manual page 303

REG 316*4 1MRB520049-Uen / Rev. F
Every time pole slipping is detected, the impedance of the point
where the slip line is crossed and the instantaneous slip fre-
quency are displayed as measurements.
Further slips are only detected, if they are in the same direction
and if the rate of rotor movement has reduced in relation to the
preceding slip or the slip line is crossed in the opposite direction
outside Z -Z .
A B
A further slip in the opposite direction within Z
signals and is then signalled itself as a first slip.
The 'Trip1' tripping command and signal are generated after n1
slips in zone 1, providing the rotor angle is less than 'TripAngle'.
The 'Trip2' signal is generated after n2 slips in zone 2, providing
the rotor angle is less than 'TripAngle'.
All signals are reset if:
· the direction of movement reverses
· the rotor angle detector resets without a slip being counted
or
· no rotor relative movement was detected during the time 't-
Reset'.
ABB Switzerland Ltd
-Z resets all the
A B
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