DC-rated circuit breaker with arc suppressor
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United States of America Patent
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Oct 31, 1995
Grant Date -
N/A
app pub date -
May 28, 1993
filing date -
May 28, 1993
priority date (Note) -
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Abstract
A circuit breaker having an arc chute adjacent the arc path between a fixed and a movable contact. To aid in extinguishing the arc under short circuit conditions, an arc suppressor element is fixed on a movable surface adjacent the movable contact; and preferably on the arm itself facing the fixed contact and arc chute. The arc suppressor is made from a thermoplastic material such as nylon 6/6 which has high temperature resistance and high dissipation factor, and absorbs a relatively large amount of water. During interruption of a high current arc, heat shock liberates gases and water vapor from the suppressor material to neutralize arc ions and blow the arc toward the chute.
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