otsekontaktid

Otsekontaktid are electrical contacts found in switches, relays, contactors, and similar electromechanical devices. They are the elements that directly enable or interrupt the flow of current in a circuit when actuated by an input such as a coil, lever, or mechanical force. The state of otsekontaktid determines whether the connected circuit is complete or open, making them fundamental to control and automation systems.

The contacts come in various configurations, including single-pole single-throw (SPST), single-pole double-throw (SPDT), and multi-pole arrangements. They switch by making (closing) or breaking (opening) a circuit and may be normally open or normally closed, depending on the device design. Each contact pair has electrical ratings for current, voltage, and interrupting capacity, along with mechanical life and actuation force. Contact materials, commonly silver alloys, are chosen for conductivity and wear resistance; in some cases, gold plating or other coatings are used for specialized, low-current applications.

Key considerations for otsekontaktid include wear and arcing, which can degrade performance over time. They are subject to oxidation and contaminants, which can increase contact resistance and cause failure. Proper rating, driver circuitry, and, when needed, arc suppression measures are important for reliable operation. Otsekontaktid are depicted in electrical schematics with standard switch symbols and are integral to automation, control circuits, safety interlocks, and sensing systems.