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2. Current sensing - Wikipedia

   en.wikipedia.org/wiki/Current_sensing

   Fiber optic current sensor, using an interferometer to measure the phase change in the light produced by a magnetic field. Rogowski coil, electrical device for measuring alternating current (AC) or high speed current pulses. Giant Magnetoresistance(GMR): Magnetic field sensor suitable for AC & DC Current with higher accuracy than Hall Effect ...

3. Solid-state relay - Wikipedia

   en.wikipedia.org/wiki/Solid-state_relay

   A solid state relay (SSR) is an electronic switching device that switches on or off when an external voltage (AC or DC) is applied across its control terminals. They serve the same function as an electromechanical relay , but solid-state electronics contain no moving parts and have a longer operational lifetime.

4. Rogowski coil - Wikipedia

   en.wikipedia.org/wiki/Rogowski_coil

   The picture shows a Rogowski coil encircling a current-carrying cable. The output of the coil, v(t), is connected to a lossy integrator circuit to obtain a voltage V out (t) that is proportional to I(t). A Rogowski coil, named after Walter Rogowski, is an electrical device for measuring alternating current (AC) or high

5. Pulse Electronics' New Sidewinder AC Current Sensor Has a ...

   www.aol.com/2012/11/06/pulse-electronics-new...

   Pulse Electronics' New Sidewinder AC Current Sensor Has a Dynamic Range of 0.10-1000+ Amps For highly accurate power measurement in smart meters, industrial motor controls, and power line ...

6. Relay - Wikipedia

   en.wikipedia.org/wiki/Relay

   A relay Electromechanical relay principle Electromechanical relay schematic showing a control coil, four pairs of normally open and one pair of normally closed contacts An automotive-style miniature relay with the dust cover taken off. A relay is an electrically operated switch. It consists of a set of input terminals for a single or multiple ...

7. ANSI device numbers - Wikipedia

   en.wikipedia.org/wiki/ANSI_device_numbers

   76 - DC Overcurrent Relay; 77 - Telemetering Device, Speed Sensor; 78 - Phase Angle Measuring or Out-of-Step Protective Relay; 78V - Loss of Mains; 79 - AC Reclosing Relay / Auto Reclose; 80 - Liquid or Gas Flow Relay; 81 - Frequency Relay; 81O - Over Frequency; 81R - common industry use for Rate Of Change Of Frequency Relay (ROCOF) 81U - Under ...