Detecting an abnormality of a switch in a high voltage electrical substation
AssigneeEht International Inc.
InventorsPatrick Lalonge, Robert Jeanjean
Life of this patent
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Abstract
There is provided a method for determining an abnormality during operation of a high voltage disconnect switch, the method comprising: determining a current position of an arm of the high voltage disconnect switch operatively connected to a motor, the motor being operated for driving the arm of the high voltage disconnect switch; determining a torque of the motor corresponding to the current position of the arm; comparing the torque of the motor to a torque threshold for the current position of the arm; and outputting an abnormality signal based on the comparison.
Claims20
A method for determining a malfunction of an arm of a disconnect switch, the method comprising:
- determining a current position of the arm of the disconnect switch operatively connected to a motor, the motor being operated for driving the arm of the disconnect switch;
- determining a torque of the motor when the arm of the disconnect switch is at the current position;
- comparing the torque of the motor to a torque threshold previously associated with the current position of the arm;
- determining a malfunction of the arm of the disconnect switch when the torque of the motor has either exceeded a maximum torque threshold, or is less than a minimum torque threshold;
- and
- outputting an abnormality signal indicative of the malfunction.
An apparatus for determining a malfunction of an arm of a disconnect switch, the apparatus comprising:
- a memory having a database stored therein, the database comprising a plurality of torque thresholds and associated positions of the arm of the disconnect switch operatively connected to a motor, wherein the motor drives the arm of the disconnect switch;
- and
- a torque comparison unit having a processing unit that receives a current position of the arm and a torque of the motor when the arm of the disconnect switch is in the current position, and that compares the torque of the motor to one of the torque thresholds having an associated position of the arm corresponding to the current position of the arm in order to obtain a comparison result, and that determines a malfunction of the arm of the disconnect switch when the torque of the motor has either exceeded a maximum torque threshold, or is less than a minimum torque threshold, and outputs an abnormality signal indicative of the malfunction.
A system for determining a malfunction of an arm of a disconnect switch, the system comprising:
- a position sensor for determining a current position of the arm of the disconnect switch operatively connected to a motor, the motor being operated to drive the arm of the disconnect switch;
- a torque determining module that determines a torque of the motor when the arm of the disconnect switch is at the current position;
- and
- an abnormality detecting module connected to the position sensor and the torque determining module that compares the torque of the motor to a torque threshold previously associated with the current position of the arm to obtain a comparison result, determines a malfunction of the arm of the disconnect switch when the torque of the motor has either exceeded a maximum torque threshold, or is less than a minimum torque threshold, and outputs an abnormality signal indicative of the malfunction.
Dependencies are inferred from the claim text.