ARC SUPPRESSION DEVICE, SYSTEM AND METHODS FOR LIQUID INSULATED ELECTRICAL APPARATUS
First Claim
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1. An arc suppression system for a high-voltage electrical apparatus including at least one electrical component immersed in a liquid dielectric fluid, the arc suppression device comprising:
- a contact assembly comprising a line contact, a ground contact spaced from the line contact, and a movable contact mounted stationary to the line contact for normal operation of the electrical component; and
a stored energy element adapted to position the movable contact to complete an electrical connection between the line contact and the ground contact when the electrical component fails and generates an electrical arc of a designated magnitude and duration.
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Accused Products
Abstract
Arc suppression systems, devices and methods for avoiding undesirable arcing conditions inside a liquid-filled tank of a high-voltage electrical apparatus.
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Citations
36 Claims
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1. An arc suppression system for a high-voltage electrical apparatus including at least one electrical component immersed in a liquid dielectric fluid, the arc suppression device comprising:
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a contact assembly comprising a line contact, a ground contact spaced from the line contact, and a movable contact mounted stationary to the line contact for normal operation of the electrical component; and a stored energy element adapted to position the movable contact to complete an electrical connection between the line contact and the ground contact when the electrical component fails and generates an electrical arc of a designated magnitude and duration. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. An arc suppression system for a high-voltage electrical apparatus including a tank and at least one electrical component immersed in a liquid dielectric fluid within the tank, the arc suppression device comprising:
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a controller; a light detecting sensor coupled to the controller and located to detect a presence of electrical arcing in the tank; a current sensor coupled to the controller and monitoring a current flow to the electrical component; and an arc suppressor device connected to the apparatus and responsive to the controller to complete a circuit path to electrical ground and extinguish the arcing when the monitored current exceeds a specified level and when the detected arcing exceeds a specified duration. - View Dependent Claims (16, 17, 18, 19, 20, 21, 22, 23)
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24. A high-voltage arc suppression system comprising:
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a high-voltage electrical apparatus including a tank and at least one electrical component immersed in a liquid dielectric fluid within the tank; an arc suppressor device comprising a contact assembly including a line contact, a ground contact spaced from the line contact, and a movable contact mounted stationary to the line contact for normal operation of the electrical component; an actuator element configured to move the movable contact to complete an electrical connection between the line contact and the ground contact when specified arcing conditions occur in the tank; a controller operationally connected to the actuator element; a light detecting sensor coupled to the controller and located to detect a presence of electrical arcing in the tank; and a current sensor coupled to the controller and monitoring a current flow to the electrical component; wherein the controller operates the actuator in response to detected arcing conditions, detected current levels, and measured duration of arcing conditions. - View Dependent Claims (25, 26, 27, 28)
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29. A method of controlling an arc suppression system configured to detect an occurrence of arcing conditions inside a liquid-filled tank of a high-voltage electrical apparatus, the arc suppression system further configured to sense electrical current conditions in the apparatus and to complete a circuit path to ground when a fault condition is present, the method comprising:
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detecting the presence of electrical arcing inside the tank; detecting a current level contemporaneous with the detected arcing; comparing the detected current level to a first predetermined threshold level; and completing the circuit path to ground when the detected current level exceeds the first predetermined threshold level, thereby extinguishing the detected electrical arcing. - View Dependent Claims (30, 31, 32, 33)
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34. An arc suppression system comprising:
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means for detecting electrical arcing conditions inside a liquid-filled tank of an electrical apparatus; means for detecting current flow in the apparatus; means for measuring a duration of detected electrical arcing; means for completing a circuit path to ground to extinguish detected electrical arcing; and means for determining whether to operate the means for completing a circuit path in response to detected current flow and measure arc duration of detected electrical arcing conditions; wherein the means for deciding responds to certain electrical arcing conditions while ignoring other detected arcing conditions. - View Dependent Claims (35, 36)
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Specification