Motion-triggered contact insufficiency

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Motion-triggered contact insufficiency (MTCI) describes the effect of increased contact resistance occurring during or after mechanical stress or movement of an electrical contact system, sometimes appearing after a considerable amount of use, independent of electric current, difficult to detect due to temporary nature.

It covers effects related to:

  • fretting corrosion, a wear-off of the contacting surface
  • passivation
  • rolling of contacts
  • contamination