Contact device for electrical switch has thermal compensation element for preventing reduction in contact force in response to heating

摘要

The contact device has at least one pair of cooperating stationary and movable contact pieces (11,12) and an associated contact spring, at least one of the contact pieces having a thermal compensation element (13) acting as the contact carrier, for providing an increased contact pressure at the contact point upon heating. The thermal compensation element is formed as a thermal bimetallic element or is made from a shape memory alloy.