Researchers at the University of Bristol have come up with a new type of nanoelectromechanical relay to enable reliable high-temperature, non-volatile memory. The work, which is reported in Nature ...

This paper presents an adaptive protection algorithm that adjusts the tripping characteristics of the differential relaying schemes in response to changes in CT saturation levels and DC component ...

As an electric motor’s rotor turns in close proximity to the motor windings, a bucking voltage or back electromotive force (EMF) is generated. The back EMF (BEMF) generated across the start winding is ...

SPO 1-1 Given information from discussion, handouts, and reading materials, explain the pump operator's responsibilities to pump a supply line, given the length and size of line, flow and desired ...

Vishay Solid State Relay (SSR) outputs can be wired in parallel enabling the user to benefit from lower ONresistance and higher load current for ac/dc switching applications. This technique is also ...

Providing power via contact-closure circuits historically required a new third wire, but perhaps no longer. Say the words “solid-state relay” (SSR) and most engineers also naturally think of two ...

This chapter covers representative general-purpose relays used in the control circuits of most industrial, commercial, and consumer products. Relay names and terminology are in accordance with ...

Relays usually are driven using optocouplers, which offer isolation between analog and digital grounds to ensure that switching currents in the relay coils do not affect the noise margin of the ...

My July 3 column covered the theory and operation of potential relays. This article covers potential relay ratings and specifications along with systematic troubleshooting. Here is an example of a ...

An RC circuit in series with the coil allows full-current turn-on for reliable relay operation, then reduces the current to save power. Fellow engineer Sanjay R. Chendvankar of Mumbai, India, recently ...