Method and a device for detecting an internal arc in a metal-clad electrical link
First Claim
1. A device for detecting an internal arc in a metal-clad electrical link, the device comprising at least a first one-way detection unit for detecting a rising edge of an internal pressure surge generated by the internal arc and propagating inside a cladding of the electrical link, the one-way detection unit including a pressure sensor disposed outside the cladding and a tapered horn-shaped duct connected to the inside of the cladding and sloping in a direction relative to a longitudinal axis of the cladding, the horn-shaped duct having a mouth opening in the cladding, and a tip connected to the pressure sensor, wherein the one-way detection unit detects the rising edge of the internal pressure surge propagating only in the direction of sloping of the horn-shaped duct.
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Abstract
The invention relates to a method of detecting an internal arc in a metal-clad electrical link, wherein the rising edge of the internal pressure surge generated by the arc and propagating inside the cladding is detected at a fixed location along the cladding. The invention also relates to a device comprising at least one one-way detection unit constituted by a pressure sensor disposed outside the cladding and connected to the inside the cladding via a horn-shaped duct which slopes relative to the axis of the cladding, which has its mouth opening out in the cladding, and which has its tip connected to the pressure sensor.
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3 Claims
- 1. A device for detecting an internal arc in a metal-clad electrical link, the device comprising at least a first one-way detection unit for detecting a rising edge of an internal pressure surge generated by the internal arc and propagating inside a cladding of the electrical link, the one-way detection unit including a pressure sensor disposed outside the cladding and a tapered horn-shaped duct connected to the inside of the cladding and sloping in a direction relative to a longitudinal axis of the cladding, the horn-shaped duct having a mouth opening in the cladding, and a tip connected to the pressure sensor, wherein the one-way detection unit detects the rising edge of the internal pressure surge propagating only in the direction of sloping of the horn-shaped duct.
Specification