Currents may be balanced in an apparatus including first and second conductors electrically connected to a third conductor and configured to be coupled to respective first and second parallel-connected circuit breaker switches using at least one magnetic core positioned adjacent at least one of the first and second conductors to introduce an inductance in the at least one of the first and second conductors. The at least one core may include at least one magnetic material ring that at least partially surrounds the at least one of the first and second conductors. The at least one magnetic material ring may include a plurality of laminated layers of grain-oriented steel.

Currents may be balanced in an apparatus including first and second conductors electrically connected to a third conductor and configured to be coupled to respective first and second parallel-connected circuit breaker switches using at least one magnetic core positioned adjacent at least one of the first and second conductors to introduce an inductance in the at least one of the first and second conductors. The at least one core may include at least one magnetic material ring that at least partially surrounds the at least one of the first and second conductors. The at least one magnetic material ring may include a plurality of laminated layers of grain-oriented steel.

A prefabricated electrical module and system along with fabrication and installation methods are provided. The prefab electrical module includes a circuit breaker panel casing that houses multiple circuit breakers, and a chase extending upwardly from the panel casing that stows coiled lengths of homerun wiring attached to the circuit breakers. During transport, a temporary panel casing front cover protects the panel casing front, and a forwardly protruding guard cover with an upwardly projecting hoisting handle shields the front and top of the chase and wiring. During installation, a hoisting bracket is attached at the top of the stud bay into which the prefab electrical module will be installed. A drill-powered winch is then used to lift the module to the proper height in the bay. The panel casing, chase, wiring, and breakers remain in the wall. The hoisting bracket, temporary panel casing front cover, guard cover, drill, and winch are reusable.

The present disclosure provides a coupling system for coupling a medical accessory to an accessory support is provided. The present disclosure also provides a system for powering a medical accessory with an accessory support.

An apparatus for selectively coupling a load to a grid power source and an inverter that is fed electric power by an alternate power source includes a first node coupled to the load. A grid sensor senses a state of the grid power source. A grid relay couples the grid power source to the first node when in a closed state and decouples the grid power source from the first node when in an open state. An inverter relay couples the inverter to the first node when in a closed state and decouples the inverter from the first node when in an open state. A controller is programmed to: cause the grid relay and the inverter relay to closed when the grid sensor indicates available grid power and cause the grid relay to open when grid power is not available;. A communications circuit senses a current state of the controller and wirelessly communicates a change of state of a selected one of the grid sensor and the controller to a remote device.

An apparatus for selectively coupling a load to a grid power source and an inverter that is fed electric power by an alternate power source includes a first node coupled to the load. A grid sensor senses a state of the grid power source. A grid relay couples the grid power source to the first node when in a closed state and decouples the grid power source from the first node when in an open state. An inverter relay couples the inverter to the first node when in a closed state and decouples the inverter from the first node when in an open state. A controller is programmed to: cause the grid relay and the inverter relay to closed when the grid sensor indicates available grid power and cause the grid relay to open when grid power is not available;. A communications circuit senses a current state of the controller and wirelessly communicates a change of state of a selected one of the grid sensor and the controller to a remote device.

The present disclosure relates to a bushing-type current transformer, and a switchboard having the bushing-type current transformer applied thereto, comprising: a binding plate; a bushing including a first fixing part and a second fixing part located on each of the two sides of the binding plate and each providing an accommodating space; and a current transformer fitted and fixed to the first fixing part of the bushing.

The present disclosure relates to a bushing-type current transformer, and a switchboard having the bushing-type current transformer applied thereto, comprising: a binding plate; a bushing including a first fixing part and a second fixing part located on each of the two sides of the binding plate and each providing an accommodating space; and a current transformer fitted and fixed to the first fixing part of the bushing.

A multiphase switchgear includes a switch panel, a vertical input housing module and a vertical switch housing module. The switch housing module and the input housing module are spaced apart from one another by a transverse housing module. The input housing module, the transverse housing module and the switch housing module form a first phase block. A plurality of phase blocks are located flush one behind the other in the direction of the transverse housing.

A multiphase switchgear includes a switch panel, a vertical input housing module and a vertical switch housing module. The switch housing module and the input housing module are spaced apart from one another by a transverse housing module. The input housing module, the transverse housing module and the switch housing module form a first phase block. A plurality of phase blocks are located flush one behind the other in the direction of the transverse housing.