Method of monitoring a tap selector
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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-
Sep 26, 2000
Grant Date -
N/A
app pub date -
Oct 7, 1998
filing date -
Oct 8, 1997
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
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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