An electrical receptacle contains contacts, at least one contact for electrical connection to a hot power line and at least one contact for a neutral power line. A controlled switch, such as a TRIAC, is connected in series relationship between the contact and the hot power line. One or more sensors are provided which detect signals of the hot power line and/or the neutral power line. The processor provides activation or deactivation control to the controlled switch in response to the detected signals that are indicative of conditions relative to the first and second contacts.

An interface circuit of an electronic device includes one or more pins, an internal circuit, an over-voltage protection circuit and a monitoring circuit. The pins are selectively connected to an external circuit. The over-voltage protection circuit is coupled between the internal circuit and at least one pin to prevent the internal circuit from being damaged by a voltage spike or a current surge received at the pin. The monitoring circuit is configured to monitor one or more electrical characteristics of at least one critical component in the internal circuit or the over-voltage protection circuit by monitoring the value of at least one parameter related to the electrical characteristics of the critical component. When the value of the parameter is outside of a safety range, the monitoring circuit outputs a warning signal.

A drive for a mobile compressor includes EMI and transient protection circuits, second chokes, converters and an inverter. The EMI and transient protection circuits include respectively common mode chokes and at least one component. Each of the common mode chokes is configured to receive a first direct current voltage and is connected to first and second grounds. The at least one component is connected to a third ground. The first, second and third grounds are at different voltage potentials. The second chokes are connected downstream from the common mode chokes. The converters are connected to outputs of the second chokes and are configured to collectively provide a second direct current voltage to a direct current bus. The inverter is connected to the direct current bus and configured to convert the second direct current voltage to an alternating current voltage to power the mobile compressor downstream from the inverter.

A surge protective device (SPD) assembly module includes a polymeric outer enclosure, an SPD module, a first terminal, and a second terminal. The polymeric outer enclosure defines an enclosed, environmentally sealed enclosure chamber. The SPD module is disposed in the enclosure chamber. The SPD module defines an environmentally sealed SPD chamber and includes: first and second electrically conductive electrode members; and a varistor member formed of a varistor material and electrically connected between the first and second electrode members. The varistor member is disposed in the SPD chamber between the first and second electrode members. The first terminal is electrically connected to the first electrode member and extending out from the outer enclosure. The second terminal is electrically connected to the second electrode member and extending out from the outer enclosure.

Disclosed herein are embodiments of a scalable connection and disconnection differential surge limiter circuit that may be utilized in any AC-coupled transceiver. Charge is recycled between PADP and PADN using two diode paths, hence protecting the PAD connected devices from voltage stress. The circuit can act as a protection circuit to limit the voltage on PADP and PADN during differential voltage spikes.

A lightning protection system of an aircraft when it is electrically powered on the ground by a generator set is described. Such an aircraft consequently includes a fuselage and a connecting connector to allow the connection to the generator set. The connecting connector includes a frame, male electrical contacts protruding on either side of said frame, and a lightning protection system inserted between the male electrical contacts and electrical elements of the aircraft. The protection system includes peak-clipping devices for clipping an electrical signal and a printed circuit having conductive tracks linking the male electrical contacts to the peak-clipping devices.

Embodiments of the disclosure can include systems and methods for limiting transient over-voltages occurring across a circuit breaker. These embodiments include providing a middle tank portion. They further include providing a first portion coupled to a first side of the middle tank portion, and a second portion coupled to a second side of the middle tank portion. They further include providing a first high voltage terminal coupled to the first portion, and a second high voltage terminal coupled to the second portion. They further include providing a post insulator supported and extending from the middle tank portion. They further include providing a first surge arrester connecting the first high voltage terminal to a first connector extending from the post insulator, and a second surge arrester connecting the second high voltage terminal to a second connector extending from the post insulator.

A system for front end protection of an RF receiver against interfering pulsed high power RF signals includes a dual-diode device comprising a first Transient Voltage Suppressor (TVS) diode; and a second TVS diode; wherein the first TVS diode and the second TVS diode are located between an RF input/output and an RF receiver front end.

A first surge absorber has a low resistance when a surge voltage which is greater than or equal to a first operating voltage is applied to a power supply line, and has a high resistance when the surge voltage which is greater than or equal to the first operating voltage is not applied. A detector outputs a detection signal indicating that the surge voltage is greater than or equal to the first operating voltage when the surge voltage is greater than or equal to the first operating voltage. A second surge absorber becomes a low resistance when a surge voltage greater than or equal to a second operating voltage is applied, and becomes a high resistance when a surge voltage greater than or equal to the second operating voltage is not applied.

A surge monitoring circuit for detecting transient spikes in an input voltage includes a voltage divider circuit that generates a divider output voltage from the input voltage, a reference voltage generator circuit that generates reference voltages, and a comparator circuit that generates comparator signals by comparing the divider output voltage to the reference voltages. The surge monitoring circuit further includes a processor configured to predict, at least based on the comparator signals, an expected failure of a surge suppressor circuit that suppresses the transient spikes, where the comparator signals indicate detections of divider output transient spikes in the divider output voltage. The divider output transient spikes correspond to transient spikes in the input voltage, where the divider output transient spikes have a higher voltage than the one or more reference voltages.