Methods and systems provide an indication that a loose connection and/or fault occurred in a breaker box or other electrical connecting device. The method includes calculating normal resistance for circuits within a breaker box when a current drawing load is present, and monitoring increases in voltage drop of the circuits to detect whether the increase is due to increased current flow or a faulty connection.

Methods and systems provide an indication that a loose connection and/or fault occurred in a breaker box or other electrical connecting device. The method includes calculating normal resistance for circuits within a breaker box when a current drawing load is present, and monitoring increases in voltage drop of the circuits to detect whether the increase is due to increased current flow or a faulty connection.

According to one aspect, embodiments of the invention provide a method of operating a UPS system, the method comprising receiving, at an input of a first UPS, input power from a power source, generating, with a first analysis circuit, a first signal indicative of a characteristic of the input power, receiving, at the analysis circuit, a second signal from a second analysis circuit of a device coupled to the power source, the second signal indicative of a characteristic of input power received at the second analysis circuit, analyzing with the analysis circuitry, the first signal and the second signal, determining, whether an improper wiring condition exists at the input, in response to a determination that an improper wiring condition does not exist, providing output power to an output of the first UPS, and in response to a determination that an improper wiring condition does exist, de-energizing the first UPS.

A diagnostic method of a system having at least one device under test and at least one peripheral device, the diagnostic method including obtaining a response of a test action conducted on the at least one device under test; and obtaining a response of a test action conducted on the at least one peripheral device; wherein if both the response of the test action conducted on the at least one device under test deviates from an expected result based on the test action conducted on the at least one device under test and the response of the test action conducted on the at least one peripheral device deviates from an expected result based on the test action conducted on the at least one peripheral device, a cross-wire fault is raised.

A system and method described herein detects the presence of an unconnected condition in high voltage component cables in an electric or hybrid-electric vehicle having a high voltage battery or energy storage system. The system includes a DC-DC converter which is capable of operating in either a step-down mode (e.g., as a buck converter) or a boost mode. The system uses the DC-DC converter operating in boost mode to create a sufficient, yet safe, measuring voltage on the main high voltage cabling of the vehicle before allowing the energy storage system to begin supplying high voltage power to the system components. The measurements are taken at various points near the individual components to determine if the cable has become disconnected.

Aspects of the present disclosure include digital wire harness assembly stations, and automated testing techniques. Examples include systems and methods for assembling and testing wire harnesses. A wire harness assembly system may include a display, a screen, a cable connector mount, an electrical testing unit, and at least one computing device to execute a test program associated with a digital wire harness diagram. At least one wire harness assembly station may move along a first track, and a test adapter associated with the electrical testing unit may be movable along a second track. The at least one computing device may execute a test program at the wire harness assembly station while the wire harness assembly and the test adapter move, respectively, along the first and second tracks.

Aspects of the present disclosure include digital wire harness assembly stations, and automated testing techniques. Examples include systems and methods for assembling and testing wire harnesses. A wire harness assembly system may include a display, a screen, a cable connector mount, an electrical testing unit, and at least one computing device to execute a test program associated with a digital wire harness diagram. At least one wire harness assembly station may move along a first track, and a test adapter associated with the electrical testing unit may be movable along a second track. The at least one computing device may execute a test program at the wire harness assembly station while the wire harness assembly and the test adapter move, respectively, along the first and second tracks.

The present invention relates to a method for testing wiring of an electrical installation having multiple circuits. In the method, multiple test signals are generated. Each of the multiple test signals has a combination of predefined harmonics having at least one higher harmonic, wherein the amplitude and/or phase of the at least one higher harmonic of the multiple test signals are different. The multiple test signals are injected into multiple first connections, which are assigned to the multiple circuits, at a first point of the electrical installation.

The present invention relates to a method for testing wiring of an electrical installation having multiple circuits. In the method, multiple test signals are generated. Each of the multiple test signals has a combination of predefined harmonics having at least one higher harmonic, wherein the amplitude and/or phase of the at least one higher harmonic of the multiple test signals are different. The multiple test signals are injected into multiple first connections, which are assigned to the multiple circuits, at a first point of the electrical installation.

A board mis-insertion prevention circuit includes a first detection circuit, a second detection circuit, and a control module. The first detection circuit detects whether a board is in a first state and outputs a first detection signal when the board is in the first state. The second detection circuit detects whether the board is in a second state when the board is not in the first state, and outputs a second detection signal when the board is in the second state. The control module receives the first detection signal or the second detection signal and can allow or disconnect a power supply to the board according to the first detection signal or the second detection signal.