Method of monitoring a tap selector

Details Method of monitoring a tap selector Method of monitoring a tap selector

G - Physics

05

F

G05F 1/147 (2006.01) H01H 9/00 (2006.01) H01H 19/12 (2006.01) H01H 1/00 (2006.01)

Patent

CA 2249975

A tap selector for a power transformer switchable under load is monitored by detecting the effective values of current and voltage of the drive motor of the tap changer. The power is calculated and from that the instantaneous torque and the latter is compared with setpoint values either of the torque and position of the tap selector or in terms of characteristic segments of the torque versus time graph with normalized segments of a setpoint graph so that, with serious deviation an immediate shutdown of tap selector operations is ensured or information can be generated as to trends or the need for maintenance.

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