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A time switch (also called a timer switch, or simply timer) is a device that operates an electric switch controlled by a timer. Intermatic introduced its first time switch in 1945, which was used for "electric signs, store window lighting, apartment hall lights, stokers, and oil and gas burners." A consumer version was added in 1952.
In electrical systems and cable systems, time domain reflectometry techniques can be used: pulses are sent down electric wiring and the pulses reflected back are examined for anomalies, for example intermittent leakage during the stresses of aircraft operation; this can only be done for one test channel at time and is generally limited to ...
Every time the contacts of an electromechanical relay, switch or contactor are opened or closed, there is a certain amount of contact wear. An electric arc occurs between the contact points (electrodes) both during the transition from closed to open (break) or from open to closed (make).
Inventor of the intermittent windshield wiper Robert William Kearns (March 10, 1927 – February 9, 2005) was an American mechanical engineer, educator and inventor who invented the most common intermittent windshield wiper systems used on most automobiles from 1969 to the present.
Usually utilization category is mentioned in most of the switch gear, with the above contactor stating to be used under AC1 - resistive load & AC3 for motor usage In electrical engineering utilization categories are defined by IEC standards [ 1 ] and indicate the type of electrical load and duty cycle of the loads to ease selection of ...
16:8 intermittent fasting: Also known as time-restrictive eating, this method involves limiting eating to an eight-hour window throughout the day and fasting for the following 16 hours. "It's ...