Patent ID: 6816352
Filing Date: 2004-11-09
Classification: H02H

Abstract:
An apparatus for providing abnormal overvoltage protection between inputs and outputs, both including line and neutral, the apparatus comprising a ground, a first voltage limiter extending between the line and the ground, said first voltage limiter developing heat upon the existence of abnormal voltage between the line and the ground, a first thermal fuse, said first thermal fuse extending between the line input and the line output, said first thermal fuse opening in response to said heat developed by said first voltage limiter, a second voltage limiter extending between neutral and the ground, a second thermal fuse, said second thermal fuse extending between the neutral and the ground, said second thermal fuse opening in response to said heat developed by said second voltage limiter, a voltage interconnect, said voltage interconnect passing voltage between the line and neutral inputs under conditions of the opening of said first or second thermal fuses.