Automatic transfer switch device health monitoring
First Claim
1. A method, comprising:
- measuring, by at least one processor, a time at which control circuitry sends an instruction to a movable contact of an automatic transfer switch structured to control transmission of electrical power;
sensing, by at least one sensor, a change in position of the movable contact of the automatic transfer switch in response to the instruction;
determining, by the at least one processor, a delay between the time at which the control circuitry sends the instruction and a time at which the change in position occurs;
recording, by the at least one processor, the delay in a delay measurement queue;
determining, by the at least one processor, an average value of measured delays in the delay measurement queue;
comparing, by the at least one processor, the average value of measured delays in the delay measurement queue to a reference delay value; and
taking, by the at least one processor, an action with respect to the automatic transfer switch in response to the delay measurement queuewherein taking an action with respect to the automatic transfer switch comprises;
generating a notification upon determining that a difference between the average value and the reference delay value exceeds a threshold value; and
transmitting the notification to a user; and
wherein the method further comprises adjusting the reference delay value by the threshold value.
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Accused Products
Abstract
A method includes measuring, by at least one processor, a time at which control circuitry sends an instruction to a switch structured to control transmission of electrical power. The method further includes sensing, by at least one sensor, a change in position of the switch in response to the instruction, and determining, by the at least one processor, a delay between the time at which the control circuitry sends the instruction and a time at which the change in position occurs. The method still further includes recording, by the at least one processor, the delay in a delay measurement queue and taking, by the at least one processor, an action with respect to the switch in response to the delay measurement queue.
18 Citations
16 Claims
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1. A method, comprising:
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measuring, by at least one processor, a time at which control circuitry sends an instruction to a movable contact of an automatic transfer switch structured to control transmission of electrical power; sensing, by at least one sensor, a change in position of the movable contact of the automatic transfer switch in response to the instruction; determining, by the at least one processor, a delay between the time at which the control circuitry sends the instruction and a time at which the change in position occurs; recording, by the at least one processor, the delay in a delay measurement queue; determining, by the at least one processor, an average value of measured delays in the delay measurement queue; comparing, by the at least one processor, the average value of measured delays in the delay measurement queue to a reference delay value; and taking, by the at least one processor, an action with respect to the automatic transfer switch in response to the delay measurement queue wherein taking an action with respect to the automatic transfer switch comprises; generating a notification upon determining that a difference between the average value and the reference delay value exceeds a threshold value; and transmitting the notification to a user; and wherein the method further comprises adjusting the reference delay value by the threshold value. - View Dependent Claims (2, 3)
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4. A method comprising:
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measuring, by at least one processor, a time at which control circuitry sends an instruction to a movable contact of an automatic transfer switch structured to control transmission of electrical power, the control circuitry comprising the at least one processor; sensing, by at least one sensor, a change in position of the movable contact of the automatic transfer switch in response to the instruction; determining, by the at least one processor, at least one delay between the time at which the control circuitry sends the instruction and a time at which the change in position occurs; recording, by the at least one processor, a plurality of delays, including the at least one delay, in a delay measurement queue; adjusting, by the at least one processor, the at least one delay between the time at which the control circuitry sends the instruction and the time at which the change in position occurs by a debounce value before recording the at least one delay in the delay measurement queue, performing a first comparison of an average value of the measured delays in the delay measurement queue to a calibrated value, determining whether to transmit a notification to a user in response to the first comparison, wherein transmission of the notification comprises an action to be taken by the at least one processor with respect to the automatic transfer switch in response to the delay measurement queue; performing a second comparison that is a comparison of a median value of the measured delays in the delay measurement queue to the average value of the measured delays in the delay measurement queue, and determining whether to transmit the notification to the user in response to the second comparison.
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5. A method comprising:
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measuring, by at least one processor, a time at which control circuitry sends an instruction to a movable contact of an automatic transfer switch structured to control transmission of electrical power; sensing, by at least one sensor, a change in position of the movable contact of the automatic transfer switch in response to the instruction; determining, by the at least one processor, a delay between the time at which the control circuitry sends the instruction and a time at which the change in position occurs; recording, by the at least one processor, the delay in a delay measurement queue, wherein recording the delay comprises; recording a plurality of measured delay values in the delay measurement queue; and replenishing the delay measurement queue by discarding an oldest measured delay value upon recording a newest measured delay value, comparing, by the at least one processor, the average value of measured delays in the delay measurement queue to a reference delay value, and taking, by the at least one processor, an action with respect to the automatic transfer switch in response to the delay measurement queue, wherein taking an action with respect to the automatic transfer switch comprises; generating a notification upon determining that a difference between the average value and the reference delay value exceeds a threshold value; and transmitting the notification to a user; and wherein the method further comprises adjusting the reference delay value by the threshold value.
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6. An automatic transfer switch, comprising:
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a first movable contact member at a first location; at least one sensor configured to sense a change in position of the first movable contact member from the first location; and a circuit configured to determine at least one delay between a time at which at least the first movable contact member is instructed to move and a time at which the change in position from the first location occurs; record a plurality of delays including the at least one delay in a delay measurement queue; determine an average value of measured delays in the delay measurement queue, and perform a first comparison of the average value of the measured delays in the delay measurement queue to a calibrated value, determine whether to transmit a notification to a user in response to the first comparison, wherein transmitting the notification to the user comprises taking an action with respect to the automatic transfer switch in response to the delay measurement queue, and perform a second comparison, the second comparison being a comparison of a median value of the measured delays in the delay measurement queue to the average value of the measured delays in the delay measurement queue, and to determine whether to transmit the notification to the user in response to the second comparison. - View Dependent Claims (7, 8, 9, 10)
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11. An apparatus, comprising:
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control circuitry configured to sense a position of a movable contact of an automatic transfer switch, and to deliver an instruction to the automatic transfer switch, the automatic transfer switch being structured to control transmission of electrical power, wherein the instruction is configured to effectuate a change in the position of the movable contact of the automatic transfer switch; and a timer configured to measure respective deviations between times at which the automatic transfer switch receives the instruction and times at which the position changes; wherein the control circuitry is configured to record the measured respective deviations in a delay measurement queue and to transmit a notification to a user in response to the measured respective deviations, determine an average value of the measured respective deviations in the delay measurement queue, compare the average value of the measured respective deviations in the delay measurement queue to a reference deviation value, and take an action with respect to the automatic transfer switch in response to the delay measurement queue, wherein taking an action with respect to the automatic transfer switch comprises; generating a notification upon determining that a difference between the average value and the reference deviation value exceeds a threshold value; and transmitting the notification to a user; and wherein the control circuitry is further configured to adjust the reference deviation value by the threshold value. - View Dependent Claims (12, 13, 14, 15, 16)
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Specification