CIRCUIT BREAKER PROVIDED WITH MEANS THAT REDUCE THE SWITCHING ARC BETWEEN PERMANENT CONTACTS
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United States of America Patent
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Issued Date -
Dec 10, 2015
app pub date -
Jan 27, 2014
filing date -
Jan 29, 2013
priority date (Note) -
Abandoned
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Abstract
A movable permanent contact (4) is made up of two portions (8, 11) separated by a dielectric spacer (12) and in communication with the electrical terminal (6) by means of respective rings of contacts (9, 10). The current flows mainly in the front ring (10) and the end of the portion (8) in normal operation. When the circuit breaker opens, the connection ceases, the current passes via the arcing contacts (2, 5), and the switching arc that appears briefly between contact portions (8 and 10) is confined in a step (14) and advantageously by a dielectric cap, thereby sparing the most sensitive portions of the volume between terminals, where the electrical field is the most intense.
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