reverse power relay

@ Mr Irwanto (Electrical)(OP)25 Sep 24 12:00
'.. i am an electrical engineering student. i am learning about the alsthom MWTU 11 reverse power relay...'
1. Try Google " alsthom MWTU 11 " The manual gives very detail operation, technical data including typical wiring diagram.
2. Attention: For any Power or Reverse power relay, it is critical to observe: the Power phase sequence, the CT and PT polarity etc.
2.1 Following is applicable to Alsthom MWTU 11 per the manual. Other brands may have different arrangements.
a) the power phase sequence e.g. A,B,C,
b) the PT is placed at the down-stream of the CT,
c) take note that the CT is on the A-phase and Power flow is P1, P2, Sec. S1 to terminal 27, S2 to terminal 28,
d) voltage is depending on 1-phase or 3-phase.
e.g. for 1-phase, phase A to PT pri. terminal A. Neutral to PT N. PT sec. a to terminal 21, n to terminal 22.
Che Kuan Yau (Singapore)