Various implementations are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.

Various implementations described herein are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments disclosed herein include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.

A GFCI includes a current sensor system providing a current sensor signal indicating a leakage current of the AC power system. A magnitude detector is configured to provide a first channel signal indicating an RMS value of the current sensor signal. A reference signal generator is configured to provide a second channel signal indicating a trip reference value responsive to a frequency of the current sensor signal. A fault detector is configured to provide a fault trip signal indicating ground fault condition of the AC power system in response to the first channel signal and the second channel signal. A circuit breaker mechanism is configured to open a circuit of the AC power system in response to the fault trip signal.

Various implementations described herein are directed to a method for detecting, by a device, an increase in temperature at certain parts of an electrical system, and taking appropriate responsive action. The method may include measuring temperatures at certain locations within the system and estimating temperatures at other locations based on the measurements. Some embodiments disclosed herein include an integrated cable combining electrical conduction and heat-detection capabilities, or an integrated cable or connector combining electrical conduction with a thermal fuse.

An electric circuit device and method is for recognizing a closed switch contact as well as a protective ground conductor interruption in a one- or multiphase electric supply line. A control of a residual current monitoring device (RCMB control) includes one fault current control unit for generating a control signal pattern including a series of switching-on impulses forwarded to a first electronic switch unit to activate a possible artificial passive fault current on one or more active conductors and the protective ground conductor (as a return conductor), this fault current actually flowing, being recognized, and evaluated in a closed circuit in a closed switch contact to be tested and an intact protective conductor. Owing to control signal patterns varying during monitoring, a reliable detection of the artificial passive fault current is ensured even in large dynamic disturbance levels while the electric installation (supply line) to be monitored is in operation.

The invention relates to an electronic unit and a method of manufacturing an electronic unit (1), wherein the unit (1) comprises at least electronic component, wherein the unit (1) comprises at least one housing (2) for the at least one electronic component (4, 5, 6, 7) of the unit (1), wherein the unit (1) comprises at least one auxiliary power supply line (8), wherein the unit (1) further comprises an RCD switch element (12), wherein the at least one auxiliary power supply line (8) is fitted with the RCD switch element (12) and at least one exposed section (19) in such a manner that the RCD switch element (12) triggers when the at least one exposed section (19) of the auxiliary power supply line (8) is exposed to a conductive fluid, wherein the at least one exposed section (19) is arranged in a fluid collection volume of the housing.

A protective electrical wiring device including: a plurality of line terminals including a first line terminal and a second line terminal; a plurality of load terminals including a first load terminal and a second load terminal, wherein the plurality of line terminals and the plurality of load terminals are configured to be coupled to an AC electrical distribution system; a pair of contacts including a first contact and a second contact; and a latch block being configured to move between a first position and a second position, wherein in the first position the latch block permits the first line terminal and the first load terminal to be in contact with the first contact and the second line terminal and second load terminal to be in contact with the second contact, wherein, when moving from the first position to the second position, the latch block advances at least one of the first line terminal and the first load terminal away from the first contact and at least one of the second line terminal and the second load terminal away from the second contact.

A method that tests a differential protection device having a first and a second differential protection chain includes: a step of controlling the flow of a test signal for a duration smaller than a no-trip time, and steps of determining the state of the two differential protection chains after the flow of a test signal, of monitoring the conformity of the evolution of the protection chains, and of determining the state of the test. The differential protection device includes two differential protection chains and controls the flow of a test current for a duration smaller than a no-trip time. It includes modules for monitoring the evolution of the protection chains and determining the state of the test in order to control the opening of an electrical unit if the test is good. The device can be included in the electrical unit.

A safety socket (100) for protecting against a series fault comprises a thermal switch (30; 31) mounted in the socket (100) and configured to interrupt the supply current when a detected temperature exceeds a threshold temperature. The safety socket (100) further comprises an indicator (8; 10; 80) for indicating the socket (100) when the detected temperature exceeds the threshold temperature.

The present disclosure relates to a power supply grounding fault protection circuit. A power supply grounding fault protection circuit may include a power supply circuit, a leakage grounding detection circuit, a signal amplifying and shaping circuit, a microcontroller control circuit, a power supply detection and indicator circuit, a tripping mechanism control circuit, a reverse grounding detection and execution circuit, a wireless network circuit, and an automatic resetting circuit. The practice of the present disclosure may permit a user to reset the grounding fault circuit interrupter remotely after a leaking fault of a circuit is eliminated.