A system including an arc flash sensor that detects an arc flash event and an arc flash mitigation device in communication with the sensor. The mitigation device includes a path of least resistance having a path input and a path output. The arc flash sensor is located downstream the output. The mitigation device includes an electro-mechanical switch between the input and the output and an actuator. The mitigation device also includes a bypass power switch device that includes a solid-state circuit interrupter and that conduct current between the input and the output in response to an open-circuit condition of the switch. A system controller is provided to generate a trigger to activate the actuator to generate the open-circuit condition of the switch, which causes the power switch device to interrupt a fault current associated with a fault event in response to detection of the arc flash event.

An arc-flash sensor may provide flexibilities for supporting both surface mounting and peek-through mounting on a panel (e.g., a wall panel or an electrical panel). The arc-flash sensor includes a translucent optical lens, a fiber-optic cable, and a skirt around the back side of the optical lens. The translucent optical lens diffuses the light produced in an arc flash to enhance the detectability of light signals picked by the fiber-optic cable. The fiber-optic cable enters parallel to the panel and perpendicular to principal axis of the optical lens. The parallel fiber-optic cable configuration reduces sensor installation space occupied and potential damage to the sensor. The skirt is used to prevent false tripping caused by unexpected events on the fiber-optic cable side such as camera flashes, lightning, sunlight, or the like.

An arc-flash sensor may provide flexibilities for supporting both surface mounting and peek-through mounting on a panel (e.g., a wall panel or an electrical panel). The arc-flash sensor includes a translucent optical lens, a fiber-optic cable, and a skirt around the back side of the optical lens. The translucent optical lens diffuses the light produced in an arc flash to enhance the detectability of light signals picked by the fiber-optic cable. The fiber-optic cable enters parallel to the panel and perpendicular to principal axis of the optical lens. The parallel fiber-optic cable configuration reduces sensor installation space occupied and potential damage to the sensor. The skirt is used to prevent false tripping caused by unexpected events on the fiber-optic cable side such as camera flashes, lightning, sunlight, or the like.

Disclosed is a device for recognizing an arcing fault in incident light that includes a sensor for detecting absorption lines of the incident light, and an evaluation unit which generates an evaluation signal when characteristic absorption lines are detected.

Embodiments of the present disclosure may enable an electrical component within an electrical distribution equipment cabinet to be audibly monitored via an electrical fault detection device mounted on the housing of the cabinet. The electrical fault detection device may comprise a senor to detect a signal emitted from an electrical fault within the cabinet, a transducer to convert the detected signal into an electrical audio signal, and an output socket adapted for an external device that may generate an audible sound based on the detected signal. The detected sensor may be an ultrasound sensor and the detected signal may be an ultrasound emitted from the electrical fault.

Provided herein are semiconductor dies including multiple controllers for operating over an extended temperature range. In certain embodiments, a semiconductor die includes multiple circuit modules, a temperature sensor that generates a detected temperature signal, an interface that communicates with an external host, a primary controller coupled to the interface and operable to control the circuit modules, and a secondary controller coupled to the interface. In response to the detected temperature signal indicating that the temperature of the semiconductor die exceeds a threshold temperature, the primary controller enables the secondary controller, which in turn disables the primary controller and at least a portion of the plurality of circuit modules to reduce heat dissipation.

Traffic signals can become skewed due to car crashes, severe winds, vandalism, earthquakes and other man-made or natural phenomena. Severe skewing is termed a “conflict.” An advantageous position detection mechanism is configured to mount inside a traffic light signal head. If signal head movement is outside of predefined limits, an electrical signal is generated indicating a conflict, i.e. traffic signal skewing so severe that drivers and pedestrians are endangered. Normal operation of the intersection is terminated and automatic communications to an appropriate command and control facility are made. For example, a conflict may cause the traffic signal to generate a flashing red light until the traffic signal is repaired.

A set of electrical protection devices with two levels that are connected in series, the first level including a circuit breaker that is referred to as the first or upstream circuit breaker and the second level including one or more circuit breakers referred to as second or downstream circuit breakers, which are connected in parallel with respect to one another.

The trip for the upstream circuit breaker, instead of including what are referred to as instantaneous protection means, includes, firstly, a first trip chain making it possible to adjust the long-delay trip curve for inverse time and the short-delay trip curve with a no-trip time and, secondly, a second trip chain including an optical sensor that is capable of discerning light between 300 and 450 nm by eliminating visible and infrared light so as to eliminate the light that is characteristic of gas jets emitted by the one or more circuit breakers referred to as downstream circuit breakers during a switching operation, and means for simultaneously measuring the current level and the maximum threshold of light emitted at the busbars, this second trip chain being capable of causing the upstream circuit breaker to trip when the current exceeds a predetermined value and the light emitted exceeds a predetermined threshold for emitted light.

The present disclosure relates to systems and methods of sag in a power line. In an embodiment, a monitoring device may include a distance sensor and an operating parameter sensor. A processor of the monitoring device may acquire, via the distance sensor, a first distance measurement. The processor may acquire, via the operating parameter sensor, a first operating parameter measurement. The processor may provide an output signal indicating that the power line is sagging when a combination of the first distance measurement and the first operating parameter measurement exceed a first combined distance-operating parameter threshold.

Systems and techniques are disclosed that monitor an area adjacent to power system components and detect objects that may pose a probable risk of causing a fault, for example, making contact with the power system component. Various embodiments initiate a preventative, a corrective, and/or a mitigative action in advance of the fault. Examples of possible actions include, but are not limited to, an audible alert, a visual alert, a tactile alert, a remote notification, a limiting of machinery motion, a stopping of machinery motion, a reversing of machinery motion, de-energization of the power system component, or combinations thereof.