An electrical device arrangeable in a row with other electrical devices includes: a first bus section contactable with a further electrical device arranged on a first side of the electrical device; a second bus section contactable with a further electrical device arranged on a second side of the electrical device facing away from the first side; and a contact device, to which an electrical assembly is connectable, and which includes a contact element for establishing an electrical connection between the first bus section and the second bus section when the contact device is not connected to the electrical assembly, and, when the contact device is connected to the electrical assembly, is displaced in order to disconnect the first bus section and the second bus section from one another.

A terminal connecting mechanism includes a plate spring, an insulating housing having an accommodating portion to accommodate a fixed portion and an elastic portion of the plate spring, and a terminal electrode portion disposed in the accommodating portion. The accommodating portion includes a first opening to allow a conductor portion of an electric wire to be inserted into the accommodating portion, an electric wire insertion guide wall disposed from the first opening along an insertion direction of the electric wire, to guide the conductor portion, an inclined wall facing the electric wire insertion guide wall and being inclined toward the electric wire insertion guide wall along the insertion direction of the electric wire, wherein the fixed portion is fixed to the inclined wall, and a second opening to allow a jig to be inserted into the accommodating portion, thereby canceling contact between the elastic portion and the conductor portion.

A circuit breaker housing for holding a switching device unit and a number of connection contacts for a connection line and/or a busbar. The housing has a first housing part and a second housing part. In the joined, assembled state, the housing parts form a front side and a rear side opposite said front side and at least one connection side and end faces located opposite one another. A holding chamber for a connection module having one of the connection contacts is provided on the front side and/or on at least one of the connection sides.

Stackable electric contact block including a casing that defines its volume, the casing having upper and lower faces for connecting the block to another component, the casing accommodating a screw for fixing the block to another component, and a press rod capable of moving from a rest position to an activation position for transferring a translation force to a component attached to the lower face of the casing, the press rod including an activation head in the form of a wedge capable of engaging with a push-button or a rotary knob, the casing including a cavity for guiding the press rod between its rest and activation positions, in which cavity the press rod is accommodated. A device for guiding the press rod into the guide cavity includes a guide tab accommodated in a matching guide slot passing through the activation head.

A plug-in connection arrangement for arranging a relay includes a terminal block comprising a relay holder configured to hold a relay. The relay has a bottom wall, a side wall, and a contact plug which projects out of the bottom wall. The side wall is arranged perpendicular to the bottom wall and includes an offset section which contacts the bottom wall and projects out into the relay in a direction of a surface normal of the side wall. The relay holder includes a socket configured to hold the contact plug of the relay when the relay is inserted into the relay holder. The relay holder also includes an insulating wall which, when the relay is inserted into the relay holder, is aligned parallel to the side wall and projects beyond the bottom wall to form an angled insulation section for the contact plug along a surface of the insulating wall.

A test system and method for relay connection and testing of a power transmission and distribution grid including a fixed connection block connected to the power transmission and distribution grid, and a mobile plug which connects the fixed connection block or a mobile test block with the relay when the mobile plug is inserted into the fixed connection block or the mobile test block. The mobile test block provides a connection to an external relay testing device when the mobile test plug is inserted into the mobile test block, the fixed connection block provides internal shorting that is activated when the mobile plug is not inserted into the fixed connection block and is deactivated when the mobile plug is inserted into the fixed connection block, and the fixed connection block, mobile plug, and the mobile test block provides an interaction between a power transmission and distribution grid side and a relay side. This allows a quick recovery when relays are damaged in a cyber-attack.

An electric meter includes: a plurality of connectors configured to form electrical connections to corresponding plurality of receptacles in an electric meter socket, wherein at least one electrical connection to the plurality of receptacles is formed with a neutral wire; and a plurality of measurement devices configured to measure electrical characteristics of voltage and current waveforms provided to the electric meter from an electric distribution system and a distributed energy resource (DER) device via the plurality of connectors. The neutral wire provides an electrical reference point for measurement of the voltage waveforms.

An electric meter socket includes: a first plurality of connection points within the electric meter socket configured to form electrical connections to line voltage wirings of an electric distribution system; a second plurality of connection points within the electric meter socket configured to form electrical connections to output voltage wirings of a DER device; one or more connection points within the electric meter socket configured to form an electrical connection of neutral wires of the electric distribution system, the DER device, and a load; and a plurality of receptacles, each of the plurality of receptacles electrically connected to a corresponding connection point and configured to accept a mating connector of an electric meter.

A modular I/O device includes a terminal base with a terminal block that includes a plurality of wiring connectors. An auxiliary wiring device includes a plurality of auxiliary wiring connectors and is selectively physically connectable to the terminal base in an operative position and selectively physically removable from the terminal base. The terminal block and auxiliary wiring connector can be coupled to an I/O module. One or more of the I/O module terminal block and auxiliary wiring connector can include electrical or electronic components included converters, fuses, switches, etc.

A contact insert for a connecting terminal, wherein the contact insert has a busbar piece and a clamping spring for clamping an electrical conductor in a conductor insertion direction, wherein the busbar piece and the clamping spring form a clamping point for the electrical conductor to be clamped, and wherein the contact insert has a bushing contact for receiving a contact pin. The longitudinal extension direction of the bushing contact runs essentially perpendicular to the conductor insertion direction from the busbar piece. The bushing contact is designed to receive the contact pin perpendicular to the longitudinal extension direction of the bushing contact and to receive the contact pin in the longitudinal extension direction of the bushing contact.