| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a thermal trip unit for a circuit breaker having a primary conductive path for conducting a load current. <P>SOLUTION: The thermal trip unit comprises a shape memory alloy (SMA) member adapted to change from a first shape to a second shape at a predetermined thermal condition, a holding member coupled electrically in series with the circuit breaker primary conductive path, and arranged to operatively support the SMA member, in which the SMA member is configured and disposed within the circuit breaker to trigger a trip response of the circuit breaker at the predetermined thermal condition. <P>COPYRIGHT: (C)2012,JPO&INPIT |
