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Definition of "Contact Resistance" |
Maximum permitted electrical resistance of pin and socket contacts when assembled in a connector under typical service use. / The resistance between metallic contacts and the semiconductor. The resistance between the contacts of a relay or switch during connection. The resistance [which increases over time] of a pair of closed contacts which effectively appears in series with the load. / The term contact resistance refers to the contribution to the total resistance of a material which comes from the electrical leads and connections as opposed to the intrinsic resistance, which is an inherent property, independent of the measurement method. / In an electric power system, overcurrent or excess current is a situation where a larger than intended electric current exists through a conductor, leading to excessive generation of heat, and the risk of fire or damage to equipment. Possible causes for overcurrent include short circuits, excessive load, and incorrect design. Fuses, circuit breakers, temperature sensors and current limiters are commonly used protection mechanisms to control the risks of overcurrent. |
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