A combination test device including detection circuitry, outlet tester circuitry, and a single housing. The detection circuitry is configured to wirelessly detect a voltage. The outlet tester circuitry electrically is configured to perform a plurality of electrical outlet testing functions. The single housing has a first end, a second end opposite the first end, and an enclosure between the first end and the second end. The enclosure encloses the detection circuitry positioned at the first end and encloses the outlet tester circuitry positioned at the second end.

A system can include a memory that can store a fuse load database including a list of fuses, a list of loads each designed to be coupled to at least one fuse from the list of fuses and a list of current values each corresponding to a load from the list of loads. The system can also include an input device configured to receive a selection of a fuse from the list of fuses. The system can also include a modeling processor coupled to the memory and the input device. The modeling processor can determine one or more loads from the list of loads that are designed to be coupled to the selected fuse. The modeling processor can also generate load summary data corresponding to a sum of the current values that correspond to the one or more loads.

A power conversion apparatus includes a power conversion device connected to a 3-phase AC power source, a first fuse positioned on a first phase of the source between the conversion device and the source, a second fuse positioned on a second phase of the source between the conversion device and the source, a first voltage detection device which detects first voltage between a third phase and the first phase of the source on the conversion device side with respect to the first fuse, a second voltage detection device which detects second voltage between the third and second phases of the source on the conversion device side with respect to the second fuse, and a status detection device connected to the first and second voltage devices such that the status device detects status of the first and second fuses based on comparison between detection result of the first and second voltage.

A ground fault detection circuit comprising a fuse and a fuse detect circuit. The fuse and the fuse detect circuit are arranged to be coupled in parallel between a reference point and a second point of a monitored circuit for which ground faults are to be detected. The fuse detect circuit is further arranged to detect a fuse break indicative of a ground fault condition and disable at least a portion of the monitored circuit.

A vehicle having a diagnostic system for a fuse is provided. The vehicle has first and second voltage sensors, a current sensor, and a microcontroller. The first and second voltage sensors generate first and second signals, respectively, indicating first and second voltage levels, respectively, at first and second ends, respectively, of the fuse. The current sensor generates a third signal indicating a current level flowing through the fuse. The microcontroller determines first and second voltage values based on the first and second signals, respectively, a current value based on the third signal, and a first resistance value utilizing the first and second voltage values and the current value. The microcontroller generates a diagnostic signal indicating degraded operation of the fuse if the first resistance value is greater than an end-of-life resistance value.

Systems and methods for detecting thermal-mechanical strain fatigue in an electrical fuse include a controller configured to monitor at least one fuse fatigue parameter over a period of time while the fuse is connected to an energized electrical power system, and based on the monitored at least one fuse fatigue parameter, the controller is further configured to determine at least one of a consumed service life of the fuse element or a service life remaining of the fuse element.

A current sensor including a measurement torus, arranged in a casing positioned around an electric conductor able to transmit an electric current, and a device for detecting a voltage in the electric conductor. The detection device is configured for surrounding the electric conductor when the current sensor is installed.

A sense circuit and method for use in measuring the blown or unblown state of fusible links (fuses), particularly in integrated circuits. Embodiments include at least one additional reference resistance to allow for a greater margin of error in determining the actual state of a fuse. By having two or more reference resistances that can be independently selectable, additional combinations of reference resistance values are available to compare against the resistance of a fuse being tested.

An apparatus for determining a status of a medical device component is disclosed. The apparatus includes at least one fusible component to indicate whether the medical device component has been used, and at least one reference component having at least one reference property that is representative of the presence, identity or type of the medical device component. The reference component is non-fusible under ordinary operating conditions.

A multi-purpose tool singularly provides all functions necessary to remove a blade-type fuse, clean the male blades of a fuse, and clean contact points of a female fuse receptacle. The tool also may provide a battery-powered circuit to check the continuity of a fuse. The tool includes a pair of abrasive tabs for cleaning female fuse receptacles, a slot with at least one abrasive surface for cleaning male fuse blades, and a pair of picking arms for grasping a fuse.