A squib driver circuit for deployment of an active safety restraint in a vehicle. The squib driver circuit may include a high side protection circuit. The high side protection circuit may include a comparator circuit to compare the input voltage to a reference voltage and activate a timer in response to the input voltage exceeding the reference voltage, the timer generating a disable signal to disable the high side driver after a predetermined period of time The high side protection circuit may disable the high side driver after a short is detected and elapse of the predetermined period of time. The squib driver circuit may be formed on a single chip.

There is provided an integration of the leakage current functions of an RCD and the voltage sensing functions of other prior art protection devices. By integrating the two capabilities into one decision making system/algorithm, and considering the circuits performance in terms of leakage current as it correlated with elevated protective earth voltages (and vice versa), an embodiment is created which is able to look into a protected electrical system and make much more precise and discerning decisions on electrical status and probability of unsafe events. The resultant technology attends to the outstanding issues with the prior art technologies as they stand, and provides a protection solution that covers the entire range of electrical power wiring configurations and the practical complexities of modern electrical works.

There is provided an integration of the leakage current functions of an RCD and the voltage sensing functions of other prior art protection devices. By integrating the two capabilities into one decision making system/algorithm, and considering the circuits performance in terms of leakage current as it correlated with elevated protective earth voltages (and vice versa), an embodiment is created which is able to look into a protected electrical system and make much more precise and discerning decisions on electrical status and probability of unsafe events. The resultant technology attends to the outstanding issues with the prior art technologies as they stand, and provides a protection solution that covers the entire range of electrical power wiring configurations and the practical complexities of modern electrical works.

A safety-oriented load switching device for the electric switching of an automation component, the device including a first branch circuit and a second branch circuit which extend from a respective supply-side supply connection to a respective load-side load connection, wherein a switching assembly including a parallel circuit of a switching means designed for an opening and a closing of the respective branch circuit and of a resistor means is formed in each branch circuit, and further including at least one measuring point located between the switching assembly and the load connection, and wherein a potential measuring device, which is electrically connected to a reference point and configured for providing a potential-dependent measuring signal, is connected to the measuring point.

A power cord leakage current detection and protection device, including a switch unit configured to control an electrical connection between an input end and an output end of the device; a leakage current protection unit, which includes a switch drive module and a leakage current detection module, the switch drive module configured to control the switch unit based on a leakage current signal detected by the leakage current detection module, wherein the leakage current detection module includes a leakage current detection line configured to detect whether a leakage current is present on a first power supply line and/or a second power supply line, and a signal feedback line configured to detect whether the leakage current detection line has an open circuit; and a test unit, including a test switch, coupled to the a leakage current protection unit, wherein when the test switch is closed, the switch drive module controls the switch unit based on a signal on the signal feedback line.

The invention provides grounding safety control point monitoring method, measuring circuit and equipment grounding measuring system, wherein, The grounding safety control point monitoring method comprises the following steps: A safety monitoring level signal corresponding to each circuit is output according to the comparison result of the voltage between the grounding safety control points of at least one circuit and the preset grounding safety standard voltage; one circuit of safety action level signal is adjusted and output according to at least one circuit of input safety monitoring level signal; grounding safety protection is done according to the safety action level signal. All grounding points are monitored in real time by comparing the voltage between grounding safety control points with preset grounding safety standard voltage, so as to guarantee the product safety, equipment safety and personal safety.

The invention provides grounding safety control point monitoring method, measuring circuit and equipment grounding measuring system, wherein, The grounding safety control point monitoring method comprises the following steps: A safety monitoring level signal corresponding to each circuit is output according to the comparison result of the voltage between the grounding safety control points of at least one circuit and the preset grounding safety standard voltage; one circuit of safety action level signal is adjusted and output according to at least one circuit of input safety monitoring level signal; grounding safety protection is done according to the safety action level signal. All grounding points are monitored in real time by comparing the voltage between grounding safety control points with preset grounding safety standard voltage, so as to guarantee the product safety, equipment safety and personal safety.

The present disclosure envisages an apparatus for providing protection against an insulation failure in an electrical appliance. A first isolating means is connected in phase line of the AC power source. A second isolating means is connected in the neutral line. At least one TRIAC, having two main terminals and one gate terminal, is connected in parallel to appliance. First main terminal is connected to the phase line between first isolating means and electrical appliance, and second main terminal is connected to the neutral line between second isolating means and electrical appliance. The gate terminal is connected to the body of electrical appliance. In the event of insulation failure, the TRIAC, upon being triggered, blows out the first and second isolating means and thereby electrically isolates the appliance from the AC power source.

Method for detecting a protective conductor failure inside a cable including a plurality of conductors, in which at least one conductor has a shield and this shield is respectively connected to a potential at a first end and at a second end of the cable, wherein, in order to drive its potential to a predefined potential value, the shield is actively electrically supplied at at least one end of the cable. In this case, the cable may be a charging cable which is connected, by the first end, to a charging pole and is connected, by the second end, to a battery configured to be installed in an electric vehicle, and the shield is actively supplied at the first end of the cable which is connected to the charging pole.

Method for detecting a protective conductor failure inside a cable including a plurality of conductors, in which at least one conductor has a shield and this shield is respectively connected to a potential at a first end and at a second end of the cable, wherein, in order to drive its potential to a predefined potential value, the shield is actively electrically supplied at at least one end of the cable. In this case, the cable may be a charging cable which is connected, by the first end, to a charging pole and is connected, by the second end, to a battery configured to be installed in an electric vehicle, and the shield is actively supplied at the first end of the cable which is connected to the charging pole.