An adapter with an insertion guide for connection between a porcelain tube and a branch tube is provided at an upper end portion of the branch tube. The adapter with the insertion guide includes an insertion guide portion extending in an axial direction of the branch tube. After inserting a lower end of a central conductor into an insertion portion of an arc-extinguishing chamber, a flange of the porcelain tube is inserted into the adapter with the insertion guide by guidance of the insertion guide portion. Accordingly, in a state where a bushing and the branch tube are self-aligned with each other, a lower end portion of the central conductor is inserted into the insertion portion.

The invention relates to an arrangement and a method for switching clearances between contacts by means of switching devices, wherein an energy provides an actuator energy for at least one switching device, in particular a vacuum interrupter.

A current sensing apparatus is disclosed that provides improved immunity to external magnetic fields, enhanced resolution, and a wide sensing range. The current sensing apparatus includes a conductor having a plurality of current path regions formed therein, which are separated by a pair of slots formed through the conductor. A pair of magnetic field sensors is positioned relative to the pair of slots to sense a magnetic field produced by a current flow through one of the current path regions.

A switchgear apparatus configured for operation at voltages up to 72.5 kV includes a vacuum interrupter assembly having a fixed contact and a movable contact configured to move relative to the fixed contact between a closed position in which the movable contact is in contact with the fixed contact and an open position in which the movable contact is spaced from the fixed contact. The switchgear apparatus also includes an electromagnetic actuator configured to move the movable contact between the open position and the closed position, a manual trip assembly movable from an initial position to an actuated position to move the movable contact from the closed position to the open position, and a mechanical interlock assembly configured to prevent the movable contact from moving from the open position to the closed position when the manual trip assembly is in the actuated position

A switchgear apparatus includes a vacuum interrupter assembly having a movable contact and a stationary contact, a main housing surrounding the vacuum interrupter assembly, and a first terminal electrically coupled to one of the movable contact and the stationary contact, the first terminal extending from the main housing along a first axis. The switchgear apparatus also includes a second terminal electrically coupled to the other of the movable contact and the stationary contact, the second terminal extending from the main housing along a second axis, and a mounting head couplable to the main housing in a plurality of orientations about the first axis.

A system includes an electrical apparatus configured to monitor or control one or more aspects of an electrical power distribution network; and a control system including more than one electronic processor, where the electronic processors are configured to cause the control system to interact with the electrical apparatus, an interaction between the control system and the electrical apparatus including one or more of the control system providing information to the electrical apparatus and the control system receiving information from the electrical apparatus, and if some of the electronic processors are unable to cause the control system to interact with the electrical apparatus, at least one of the other electronic processors is able to cause the control system to interact with the apparatus.

A smart, self-feeding fuse with current detection and communication capabilities for use in overhead medium voltage electrical distribution networks (15 kV to 34 kV). The device is configured to detect transient or permanent electric faults (sensor), and/or to be used as a communication device (gateway) that preserves the main protection function of the fuse element. The device is assembled on a base fuse and is simply installed by using a maneuver pole, similarly to the installation of a conventional fuse tube. The invention is self-fed by a high output current transformer with the help of photovoltaic cells, using a supercapacitor bank as the only power storage element.

An apparatus includes: a high-voltage module including: a current interrupter; an actuation system coupled to the current interrupter; a sensor system; and a terminal configured to electrically connect to an external electrical device. The apparatus also includes: a user interface; and an electrically insulating assembly between the user interface and the high-voltage module. In operational use, the user interface is grounded and the high-voltage module is at a system voltage.

A switchgear or control gear includes: at least one first compartment; at least one second compartment; a plurality of main switchgear or control gear components including a main busbar system, a three position linear or rotational movement disconnector, a circuit breaker, and at least a first part of an insulated cable connection; and a plurality of auxiliary switchgear or control gear components including a disconnector drive and a circuit breaker drive. The plurality of main switchgear or control gear components are housed in the at least one first compartment. The plurality of auxiliary switchgear or control gear components are housed in the at least one second compartment. When one or more of the plurality of main switchgear or control gear components is energized, the at least one first compartment is hermetically sealable or maintainable at an internal air pressure greater than ambient air pressure.

A circuit breaker includes two or more poles electrically connected between a power supply and a contactor. Each of the two or more poles comprises a switch. The circuit breaker includes one or more voltage measuring devices configured to measure at least one phase-to-phase voltage level, and one or more current detecting devices configured to detect current going through each of the two or more poles. The circuit breaker further includes a control circuitry configured to: monitor the at least one phase-to-phase voltage level; in response to determining the at least one phase-to-phase voltage level is within a threshold range, close corresponding switches; in response to detecting current flowing through at least one of the two or more poles, maintain the corresponding switches in a closed position; and close all additional switches associated with the two or more poles after a period of time.