In some embodiments, a system and/or method may test logic blocks for an integrated circuit. To alleviate problems associated with current methods of integrated circuit testing, a system may include a power switch control signal on a different voltage rail. In some embodiments, a Test VDD may be used to isolate the power switches from the rest of the logic cells in an integrated circuit. During testing, each logic block may be powered individually using the Test VDD to control the power switches to the logic blocks. When a logic block short is identified, the nonviable logic block may be isolated to such that the nonviable logic block is not used during the future and only viable logic blocks are used in the integrated circuit. This allows for use of logic within an integrated circuit that might otherwise have been discarded or destroyed because of one or more shorts.

In some embodiments, a system and/or method may test logic blocks for an integrated circuit. To alleviate problems associated with current methods of integrated circuit testing, a system may include a power switch control signal on a different voltage rail. In some embodiments, a Test VDD may be used to isolate the power switches from the rest of the logic cells in an integrated circuit. During testing, each logic block may be powered individually using the Test VDD to control the power switches to the logic blocks. When a logic block short is identified, the nonviable logic block may be isolated to such that the nonviable logic block is not used during the future and only viable logic blocks are used in the integrated circuit. This allows for use of logic within an integrated circuit that might otherwise have been discarded or destroyed because of one or more shorts.

Method for detecting a sag in a phase voltage, including the steps of: measuring, upstream of a switching member and at regular intervals, the phase voltage and a phase current flowing through a phase conductor; when the phase voltage falls below a predetermined voltage threshold, opening the switching member; subsequent to opening the switching member, if the phase voltage returns to a normal voltage value defined according to the phase current, detecting a malfunction of the electricity meter, generating a warning message, and keeping the switching member open; subsequent to opening the switching member, if the phase voltage remains below the predetermined voltage threshold, detecting a sag in the phase voltage, generating an alert message, and closing the switching member.

Method for detecting a sag in a phase voltage, including the steps of: measuring, upstream of a switching member and at regular intervals, the phase voltage and a phase current flowing through a phase conductor; when the phase voltage falls below a predetermined voltage threshold, opening the switching member; subsequent to opening the switching member, if the phase voltage returns to a normal voltage value defined according to the phase current, detecting a malfunction of the electricity meter, generating a warning message, and keeping the switching member open; subsequent to opening the switching member, if the phase voltage remains below the predetermined voltage threshold, detecting a sag in the phase voltage, generating an alert message, and closing the switching member.

A method of detecting electrical failures in a wind turbine generator control system is described. The method comprises sending a test pulse through a signal path within the control system and detecting the test pulse once it has passed through the signal path, measuring a current through the signal path, and determining an input status and/or an output status of the signal path. Then, the nature of the electrical failure is identified based on a combination of the detected test pulse, the measured current and the determined input status and/or output status of the signal path.

A method of detecting electrical failures in a wind turbine generator control system is described. The method comprises sending a test pulse through a signal path within the control system and detecting the test pulse once it has passed through the signal path, measuring a current through the signal path, and determining an input status and/or an output status of the signal path. Then, the nature of the electrical failure is identified based on a combination of the detected test pulse, the measured current and the determined input status and/or output status of the signal path.

A device and a method for testing receptacle wiring are revealed. The device for testing receptacle wiring includes a signal transmitter and a receiver. The signal transmitted is plugged into a receptacle to be tested while the receiver is used to detect voltage signals of no-fuse breakers (NFB) and receive signals from the signal transmitter so as to find out correspondence between the NFB and the receptacle correctly.

A device and a method for testing receptacle wiring are revealed. The device for testing receptacle wiring includes a signal transmitter and a receiver. The signal transmitted is plugged into a receptacle to be tested while the receiver is used to detect voltage signals of no-fuse breakers (NFB) and receive signals from the signal transmitter so as to find out correspondence between the NFB and the receptacle correctly.

The present invention addresses the problem of diagnosing a failure of a discharge resistor, while suppressing deterioration of discharge capacity. Disclosed is a failure diagnostic device for a discharge circuit 60 for discharging electricity from an electricity storage element 31. The discharge circuit 60 includes a resistance circuit 61 comprising a plurality of resistor blocks B connected in parallel, and each of the resistor blocks B comprises a plurality of discharge resistors Ra, Rb connected in series. During the time when electricity is being discharged from the electricity storage element 31, the failure diagnostic device diagnosis a failure of the resistance circuit 61 on the basis of a voltage or a current at a connection point P between the discharge resistors Ra, Rb.

The present invention addresses the problem of diagnosing a failure of a discharge resistor, while suppressing deterioration of discharge capacity. Disclosed is a failure diagnostic device for a discharge circuit 60 for discharging electricity from an electricity storage element 31. The discharge circuit 60 includes a resistance circuit 61 comprising a plurality of resistor blocks B connected in parallel, and each of the resistor blocks B comprises a plurality of discharge resistors Ra, Rb connected in series. During the time when electricity is being discharged from the electricity storage element 31, the failure diagnostic device diagnosis a failure of the resistance circuit 61 on the basis of a voltage or a current at a connection point P between the discharge resistors Ra, Rb.