A connector leakage protection system includes a current foldback module with a first end coupled to an output port of a DC power supply; an anti-interference module with a first end coupled to a second end of the current foldback module, and a second end coupled to a power port of a connector; and a leakage protection module between the output port and the first end of the current foldback module, or the second end of the current foldback module and the first end of the anti-interference module, or the second end of the anti-interference module and the power port. When the output port outputs a DC voltage, the leakage protection module is switched on. When the output port does not output the DC voltage, the leakage protection module is switched off, preventing current leakage from flowing to the output port. A connector leakage protection circuit is also provided.

The present invention discloses a data transmission apparatus of a circuit breaker controller. The data transmission apparatus comprises: a first component having a first power supply and a second component having a second power supply. The first component and the second component share a storage device. The second component is connected to a main circuit of the circuit breaker controller. The second component collects parameters of the main circuit and stores the parameters in the storage device. The second power supply powers the second component and is powered by the main circuit. The first component is connected to a communication device. The first component establishes data transmission between the communication device and the storage device. The first power supply powers the first component and is powered by an external power supply. The second power supply is connected to the first power supply and transmits a control signal to the first power supply.

The present invention discloses a data transmission apparatus of a circuit breaker controller. The data transmission apparatus comprises: a first component having a first power supply and a second component having a second power supply. The first component and the second component share a storage device. The second component is connected to a main circuit of the circuit breaker controller. The second component collects parameters of the main circuit and stores the parameters in the storage device. The second power supply powers the second component and is powered by the main circuit. The first component is connected to a communication device. The first component establishes data transmission between the communication device and the storage device. The first power supply powers the first component and is powered by an external power supply. The second power supply is connected to the first power supply and transmits a control signal to the first power supply.

The method for controlling selectivity of electric equipment comprises: communication of electric equipment settings between at least one electric equipment unit and a data processing device, computation of the selectivity of electric equipment according to said electric equipment settings, storing and communication of data representative of the selectivity settings and data, supervision of changes of settings and/or of changes of equipment, and checking of the compatibility between new settings after a change and the selectivity computation. The device and installation comprise means for implementing the selectivity control method.

Methods, systems, and devices for portable load balancing and source optimization are described herein. One portable load balancing and source optimization system, includes one or more electric generators that supply three phase electrical power, at least one sensor to sense whether the three phases have become unbalanced beyond a threshold amount, a set of contactors that enable the contacts of the three phases to be changed to adjust the balance of the three phases, and a controller to determine which reversible contactors of the set of contactors to change to adjust that balance of the three phases based on information from the sensor.

An autonomous breaker can apply a current through a high impedance source to a bus coupled to either end of a breaker in order to measure an impedance of the bus. The status of the bus can be determined from the measurement. Based on the determined status, a fault detection procedure can be selected and implemented to determine if a fault exists on the bus. When the fault detection procedure has been implemented and no fault has been detected, the breaker can close, and thus couple the bus to another bus.

Primary protection relays and an integrator disclosed for providing primary protection and secondary applications for an electric power delivery system. The primary protection relays obtain signals from, and provide primary protection operations for the power system, and may operate independently from the integrator. An integrator receives signals and status communications from the primary protection relays to perform secondary applications for the electric power delivery system. The secondary applications may include backup protection, system protection, interconnected protection, and automation functions.

A protection and attenuation circuit for sensitive AC loads is described. The circuit provides AC power protection and attenuation utilizing high-efficiency switch-mode techniques to attenuate an AC power signal by incorporating a bidirectional, transistorized switch driven from a pulse width modulation signal, PWM. The circuit monitors characteristics of the AC power signal driving a known load and characteristics of the load or other elements and determines the duty cycle of the pulse width modulated signal, PWM, based upon the duration and amplitude of the over-voltage, over-current, over-limit or other event.

A distribution manager for a power microgrid system includes a main bus, and a circuit breaker coupled to the main bus and to one of a load and an inter-microgrid connection system of the power microgrid system, the circuit breaker being structured to operate based on a set of functional trip settings. The distribution manager is structured and configured to: (i) determine an available source overcurrent that will be fed through the circuit breaker, (ii) determine a number of trip parameter settings based on at least the available source overcurrent, and (iii) set the functional trip settings of the circuit breaker based on the determined number of trip parameter settings.

A wiring device including a face contact; one or more line contact arms; one or more load contact arms; and a fault detection circuit. The one or more line contact arms having an upper line contact located on a bent portion of the line contact arm, and a lower line contact located on a substantially straight portion of the line contact arm. The one or more load contact arms having a load contact located on a bent portion of the load contact arm. The fault detection circuit that detects a fault condition in said wiring device and generates a fault detection signal when said fault condition is detected, wherein said fault detection signal electrically disconnects the face contact from the upper line contact and the lower line contact from the load contact.