摘要:
A thermal trip unit for a circuit breaker having a primary conductive path for conducting a load current is provided. 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, said holding member arranged to operatively support said SMA member, wherein said SMA member is configured and disposed within the circuit breaker to trigger a trip response of the circuit breaker at said predetermined thermal condition.
摘要:
An adjustable length busway joint for coupling a first and a second busway section, the first and second busway sections being longitudinally offset, is disclosed. The busway joint includes a first plurality of splice plates having a first splice plate first retaining portion, and a second plurality of splice plates disposed to overlap a portion of a corresponding splice plate of the first plurality of splice plates to form an electrical joint. Each splice plate of said second plurality of splice plates defines a splice plate first adjustment portion substantially longitudinally aligned with the first plurality of splice plates and disposed to overlap a portion of a corresponding first splice plate first retaining portion. A first positioning member is operably disposed in the first splice plate first retaining portion and said second splice plate first adjustment portion. The first and said second pluralities of splice plates are arranged for a longitudinal movement with respect each other between a first compressed position and a second extended position. The busway joint further includes a third plurality of splice plates having a third splice plate first retaining portion. Each splice plate of the second plurality of splice plates overlaps a portion of a corresponding splice plate of the third plurality of splice plates to form an electrical joint. Each splice plate of said second plurality of splice plates includes a splice plate second adjustment portion substantially longitudinally aligned with the third plurality of splice plates and overlaps a portion of a corresponding third splice plate first retaining portion. A second positioning member is disposed in the splice plate second adjustment portion and the third splice plate first retaining portion. The third and second pluralities of splice plates are arranged for a longitudinal movement with respect each other between a third compressed position and a fourth extended position.
摘要:
An adjustable busway joint for coupling two longitudinally aligned busway sections is disclosed. The adjustable joint has a first plurality of electrically conductive splice plates defining a splice plate adjustment slot, and a second plurality of electrically conductive splice plates defining an aperture, wherein each splice plate of the second plurality of splice plates is disposed to overlap a portion of a corresponding splice plate of the first plurality of splice plates to form an electrical joint, and wherein the aperture is sized and disposed to overlap at least a portion of the first splice plate adjustment slot. The joint additionally has a first clamping member disposed through the splice plate adjustment slot and the aperture such that the first and said second pluralities of splice plates are operably movable with respect each other between a first compressed position and a second extended position.
摘要:
An electrical distribution system (40) includes at least one circuit breaker device having an electrical interruption system provided with an electrical pathway, at least one micro electro-mechanical switch (MEMS) device electrically coupled in the electrical pathway, at least one hybrid arcless limiting technology (HALT) connection, and at least one control connection. A HALT circuit (190) member is electrically coupled to HALT connection on the circuit breaker device and a controller is electrically coupled to the control connection on the circuit breaker device. The controller is configured and disposed to selectively connect the HALT circuit (190) member and the at least one circuit breaker device via the HALT connection to control electrical current flow through the at least one circuit breaker device.