A fault isolating device for use in a microgrid disconnected from a main power grid includes a voltage meter for detecting a voltage anomaly indicative of an electrical fault, a timer for establishing a time window that begins and ends a predetermined time after a voltage anomaly is detected, a switch that is opened at the start of the time window, and a microcontroller that determines whether to leave the switch open to isolate a faulted portion of the microgrid or to close the switch. A plurality of fault isolating devices can be distributed throughout a microgrid to isolate a faulted branch or faulted branches of an islanded microgrid without interfering with normal fuse operation when the microgrid is connected to the main power grid.

A switch gear system is described. In some implementations, a switch gear arrestor system can include a switch gear and one or more arrestors mounted on a non-conductive insulated bar. The one or more arrestors can be connected to one or more isolators through a respective aperture in the non-conductive insulated bar. Each arrestor can be connected to one of the one or more electrical energy sources at a first end and can be connected to one of the one or more isolators at a second end. The switch gear arrestor system can further include one or more ground leads. Each ground lead can connect one of the one or more isolators to a conductive grounding bar.

A prefabricated substation is provided with a solid state breaker and a transformer. The substation preferably transforms voltage from a medium voltage to a low voltage. The substation also breaks current flow through the substation when a fault occurs. The primary components of the substation, including the transformer and solid state breaker, are located together within the housing.

A prefabricated substation is provided with a solid state breaker and a transformer. The substation preferably transforms voltage from a medium voltage to a low voltage. The substation also breaks current flow through the substation when a fault occurs. The primary components of the substation, including the transformer and solid state breaker, are located together within the housing.

A busbar adapter including a housing being adapted to be attached to a busbar, a printed circuit board, and at least one electric current sensor electrically connected with the printed circuit board, wherein the printed circuit board and the at least one electric current sensor are arranged inside the housing, wherein the housing comprises an upper housing part being adapted for the attachment of one or more devices to be connected through the busbar adapter to a busbar and a lower housing part being adapted for holding the printed circuit board and the at least one electric current sensor, and wherein the lower housing part comprises a first part being adapted for holding the printed circuit board and the at least one electric current sensor and a second part being adapted to be attached to the busbar.

A busbar adapter including a housing being adapted to be attached to a busbar, a printed circuit board, and at least one electric current sensor electrically connected with the printed circuit board, wherein the printed circuit board and the at least one electric current sensor are arranged inside the housing, wherein the housing comprises an upper housing part being adapted for the attachment of one or more devices to be connected through the busbar adapter to a busbar and a lower housing part being adapted for holding the printed circuit board and the at least one electric current sensor, and wherein the lower housing part comprises a first part being adapted for holding the printed circuit board and the at least one electric current sensor and a second part being adapted to be attached to the busbar.

An Enhanced Energy Reducing Maintenance Setting (EERMS) device is disclosed. The EERMS device includes an EERMS switch having a normal/OFF mode and a maintenance/ON mode, a IED protection relay operatively connected to the EERMS switch and configured to activate maintenance mode by receiving an IED input when the EERMS switch is switched to maintenance/ON mode, a key-solenoid lock device configured to trap a key of an EERMS panel, wherein the key-solenoid lock cylinder is energized to release the trapped key by closing of IED output NO dry auxiliary contacts, and a circuit breaker panel door comprising a circuit breaker lock cylinder mechanism interlocked with the EERMS switch. The circuit breaker lock cylinder mechanism receives and subsequently re-traps the key released by the key-solenoid lock cylinder from the EERMS panel. The circuit breaker lock cylinder mechanism is interlocked with the EERMS switch by being operatively connected to the key-solenoid lock device.

An Enhanced Energy Reducing Maintenance Setting (EERMS) device is disclosed. The EERMS device includes an EERMS switch having a normal/OFF mode and a maintenance/ON mode, a IED protection relay operatively connected to the EERMS switch and configured to activate maintenance mode by receiving an IED input when the EERMS switch is switched to maintenance/ON mode, a key-solenoid lock device configured to trap a key of an EERMS panel, wherein the key-solenoid lock cylinder is energized to release the trapped key by closing of IED output NO dry auxiliary contacts, and a circuit breaker panel door comprising a circuit breaker lock cylinder mechanism interlocked with the EERMS switch. The circuit breaker lock cylinder mechanism receives and subsequently re-traps the key released by the key-solenoid lock cylinder from the EERMS panel. The circuit breaker lock cylinder mechanism is interlocked with the EERMS switch by being operatively connected to the key-solenoid lock device.

The present invention refers to a connection device installed on-board with respect to an electric wheelchair, designed and configured to allow the charging of a respective traction battery using a charge station or column for electric vehicles which implements the mode 3 of charging compliant with the IEC 61851-1 standard. The connection device attached to the wheelchair comprises a main body configured to be connected to a first wire portion for the electrical connection to the charge station. The main body further comprises an electrical circuit configured to simulate the performance of an electric vehicle and defined compliant with the IEC 61851-1 standard, edition 3, Annex 1, chapter A.2.3.

An apparatus includes at least one fuse clearing switch operable to create a fault on at least one AC line between a fuse and a transformer of a substation. The apparatus further includes a control system configured to be coupled to an arc detector and to operate the at least one fuse clearing switch responsive to a control signal produced by the arc detector.