One embodiment describes a method that includes determining, using a control circuitry, temperature of a switching device before a make operation by applying a measurement current to an operating coil of the switching device, wherein the measurement current is insufficient to make the switching device; and determining voltage at the operating coil when the measurement current is applied, in which the voltage at the operating coil is directly related to the temperature. The method further includes determining, using the control circuitry, when to apply a pull-in current to the operating coil to close the switching device based at least in part on the voltage at the operating coil, such that the switching device makes at a desired time.

A protection module is for a modular ground fault protective relay. The modular ground fault protective relay includes a power supply module having a connection port. The protection module includes a body having a first side and a second side disposed opposite the first side, a module connector extending outwardly from the first side, the module connector being structured to be removably coupled to the connection port of the power supply module, and a module expansion port extending inwardly from the second side toward the first side.

A lockout subassembly of an electronic circuit breaker. The lockout subassembly includes a rotatable latch bar having an engagement portion configured to engage with and prevent movement of an operating handle to an ON position, the rotatable latch bar including a lock portion, and a latch device configured to be receivable in the lock portion, wherein rotation of the rotatable latch bar is limited between a first and second rotational position in response to the latch device being received in the lock portion. The lockout of the operating handle can be removed upon passing at least one test so that the operating handle can be moved to the ON position. Circuit breakers including the lockout subassembly and methods of operating the circuit breaker are provided, as are other aspects.

A control system and a method for mounting a control system, the control system comprising a signal-distribution board, a top-hat rail, at least a first contact device and at least a second contact device. The first contact device and the second contact device are arranged at the signal-distribution board with an offset relative to each other with the signal-distribution board electrically connecting the first contact device to the second contact device for at least transmitting data. The top-hat rail is mechanically fastened to the signal-distribution board and a first coupling module may be mechanically fastened to the top-hat rail, where the second contact device is embodied to electrically contact a signal-processing module or a second coupling module. The first contact device may be electrically connected to a field device.

The present disclosure relates to a molded case circuit breaker, and particularly, to a molded case circuit breaker with an insulated cover. A molded case circuit breaker in which a load-side terminal is connected to an external connection device according to an embodiment of the present disclosure includes an insulating cover coupled to an enclosure of the molded case circuit breaker, in which the insulating cover includes an insulating wall interposed between the enclosure and the external connection device.

A switching device having a housing, with a cover that can pivot about a rotational axis, and a securing device for carrier rail mounting. The cover has at least one coupling contact for an electrical and/or signal-type contact connection with at least one engageable switching device. A closing or releasing of the contact connection occurs with a pivoting of the cover. A locking or unlocking of the securing device occurs with a pivoting of the cover. The securing device has a spring-elastic clipping element shaped on the housing, for force-locking securing to a carrier rail end face, and has a sliding element, which is mounted such that it can slide in a linear manner within the housing and is coupled to the cover, for interlocking securing to the carrier rail end face opposite the clipping element.

An electrical conductor assembly for use in a power distribution assembly includes an electrical conductor. A casing covers at least a portion of the electrical conductor. The casing insulates the at least a portion of the electrical conductor.

A connector for a circuit breaker and a downstream contactor has a one-piece configuration and facilitates an electrical connection between the circuit breaker and the downstream contactor. The connector includes at least one sensor, the connector includes an evaluation unit for measured values of the sensor, and the connector includes first contacts for the circuit breaker and second contacts for the downstream contactor, both acting in the same mating direction. A feeder for connecting a load and an arrangement having a distribution system, a load and a feeder, are also provided.

The present invention relates to a molded-case circuit breaker for direct current (DC), and more particularly, to a molded-case circuit breaker for DC that contains an internal connecting conductor connecting adjacent terminals to improve insulation performance and assemblability and reduce occupied space. There is provided a molded-case circuit breaker for DC that contains a plurality of interruption units within an outer casing, the DC circuit breaker including a two-unit connecting heater that connects fixed contacts of adjacent interruption units, the two-unit connecting heater being placed within the outer casing.

One embodiment describes a tangible, non-transitory, computer-readable medium storing instructions executable by a processor in a control circuitry. The instructions include instructions to receive an instruction to make a switching device; determine, using the control circuitry, a voltage waveform of a power source; determine, using the control circuitry, a desired time to make the switching device based at least in part on the source voltage waveform; determine, using the control circuitry, an expected make time of the switching device; and determine, using the control circuitry, when to apply a pull-in current to make the switching device at the desired time based at least in part on the expected make time and the desired time to make.