Abstract: A crowbar module includes first and second electrical terminals, a module housing, and first and second crowbar units. The first crowbar unit is disposed in the module housing and includes a first thyristor electrically connected between the first and second electrical terminals. The second crowbar unit is disposed in the module housing and includes a second thyristor electrically connected between the first and second electrical terminals in electrical parallel with the first crowbar unit.

Abstract: A circuit protection device includes an overvoltage monitor circuit that is operable to monitor a power supply circuit to detect an overvoltage condition on the power supply circuit and to change a state of an overvoltage output responsive to the overvoltage condition on the power supply circuit. A bi-directional switch is operable to interrupt or limit current flow though the power supply circuit responsive to the change in the state of the overvoltage output. A bi-directional voltage limiter is connected across output terminals of the circuit protection device and is operable to limit an overvoltage to a predefined voltage limit.

Abstract: Devices include an impulse current generator that is configured to provide a direct impulse current (DIC) that includes a specified waveform to a test load during a test duration, a continuous power supply that is configured to provide a continuous power to the test load during the test duration, a trigger circuit that is configured to determine a trigger condition that corresponds to the DIC and to generate a trigger signal responsive to determining the trigger condition, and a current bypass circuit that is configured to receive the trigger signal generated by the trigger circuit and to conduct a majority portion of the DIC being conducted by the load responsive to the trigger signal.

Abstract: A modular overvoltage protection unit for electrically connecting a first power line and/or a second power line to a protected earth (PE) line in the case of an overvoltage event on the first or second power line includes a unit enclosure defining an enclosure cavity, and first and second surge protection devices (SPDs) each disposed in the enclosure cavity. Each of the first and second SPDs includes: a first electrode in the form of a metal housing defining a housing cavity; a second electrode disposed within the housing cavity; and a varistor member captured between and electrically connected with each of the first and second electrodes, wherein the varistor member is formed of a varistor material.

Abstract: Devices include an impulse current generator that is configured to provide a direct impulse current (DIC) that includes a specified waveform to a test load during a test duration, a continuous power supply that is configured to provide a continuous power to the test load during the test duration, a trigger circuit that is configured to determine a trigger condition that corresponds to the DIC and to generate a trigger signal responsive to determining the trigger condition, and a current bypass circuit that is configured to receive the trigger signal generated by the trigger circuit and to conduct a majority portion of the DIC being conducted by the load responsive to the trigger signal.

Abstract: A circuit protection device includes an overvoltage monitor circuit that is operable to monitor a power supply circuit to detect an overvoltage condition on the power supply circuit and to change a state of an overvoltage output responsive to the overvoltage condition on the power supply circuit. A bi-directional switch is operable to interrupt or limit current flow though the power supply circuit responsive to the change in the state of the overvoltage output. A bi-directional voltage limiter is connected across output terminals of the circuit protection device and is operable to limit an overvoltage to a predefined voltage limit.