Fault indicator for indication of the occurrence of a rapid surge of pressure inside of a housing of an electrical device, electric device, and,Process for indication of the occurrence of a rapid surge of pressure inside of a housing of an electrical device

摘要

"Failure indicator for indication of the occurrence of a rapid surge of pressure inside of a housing of an electrical device, electric device, and,Process for indication of the occurrence of a rapid surge of pressure inside of a housing of an electrical device.An internal fault indicator for an electric device is triggered by a sudden rise in pressure that occurs when a fault isolation creates an electric arc.The heat released in the arc is transferred to the surrounding volume, causing overheating located, vaporization and decomposition of the insulating material.The resulting surge of pressure moves the diaphragm. The movement of the diaphragm releases a spring driven by the piston of a cylinder that extends through the housing of the electrical device.Prior to activation, the piston is retained in a position "armada", by means of a retaining pin.By shooting, the piston and pushed by the spring until he point of housing to provide a visual signal of the internal failure.A pressure relief valve may be integrated with the indicator of internal failure.