A substation containing a switch-gear or control-gear system, in particular a switch-gear or control-gear system includes at least one low voltage switch-gear or control-gear, with unmanned operation and maintenance. The inner room, where the switch-gear or control-gear are located in, is hermetically enclosed by an outer housing, the switch-gear or control-gear system is provided for unmanned operation and maintenance with a robotic system or manipulator, and/or the robotic system or manipulator is provided with a camera system, and/or an image recognition system and/or the inner room is locked against the outer housing by an inner, automatically operated door, and/or the robot system is implemented in such, that the robot systems acting area is extended from the inner room, partly in the area outside the inner room, but inside the outer housing, where spare parts are stored in a spare parts hand over area.

A substation containing a switch-gear or control-gear system, in particular a switch-gear or control-gear system includes at least one low voltage switch-gear or control-gear, with unmanned operation and maintenance. The inner room, where the switch-gear or control-gear are located in, is hermetically enclosed by an outer housing, the switch-gear or control-gear system is provided for unmanned operation and maintenance with a robotic system or manipulator, and/or the robotic system or manipulator is provided with a camera system, and/or an image recognition system and/or the inner room is locked against the outer housing by an inner, automatically operated door, and/or the robot system is implemented in such, that the robot systems acting area is extended from the inner room, partly in the area outside the inner room, but inside the outer housing, where spare parts are stored in a spare parts hand over area.

A step-down power supply device includes: a first switch cabinet configured for receiving an alternating current having a first voltage and controlling an on-off switching of a power supply network; a transformer configured for receiving the alternating current from the first switch cabinet, reducing the first voltage of the received alternating current to a second voltage, and outputting the second voltage; a second switch cabinet configured for receiving the second voltage from the transformer, and outputting the second voltage; and a radiator configured for dissipating heat of at least two of the first switch cabinet, the transformer and the second switch cabinet, wherein the first voltage is greater than the second voltage. The present disclosure can reduce the size of the step-down power supply device, while improving the efficiency of heat dissipation.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

A method and system are disclosed for providing electrical power from a utility electric grid to a fracturing operation, and an electrically powered fracturing system. A mobile substation includes at least two transformer units that are operatively coupled to the utility electric grid in a parallel orientation, wherein the transformer units are capable of receiving power from the utility electric grid and stepping down the power for delivery to a switchgear. An electric motor is operatively coupled to a hydraulic fracturing pump and operatively controlled by a variable frequency drive. At least one open air relay cable is operatively coupled between the switchgear and the electric motor and capable of delivering power to the electric motor.

An integrated substation is provided. The integrated substation includes a cabinet and at least one airflow driver. The cabinet has a high pressure room, a low pressure room, and an exchange room located between the high pressure room and the low pressure room. The exchange room and the high pressure room are separated from each other by a first inner wall, and the exchange room and the low pressure room are separated from each other by a second inner wall.

An integrated substation is provided. The integrated substation includes a cabinet and at least one airflow driver. The cabinet has a high pressure room, a low pressure room, and an exchange room located between the high pressure room and the low pressure room. The exchange room and the high pressure room are separated from each other by a first inner wall, and the exchange room and the low pressure room are separated from each other by a second inner wall.

A safety system for high-voltage electrical cabinetry provides active visual and/or audible warnings during maintenance. Load monitors evaluate electrical loads of dedicated power circuits used by an existing automatic lighting system. Light and sound indicators present status information (e.g. indicating maintenance status or normal operating status) to persons in signaling areas based on whether the evaluated electrical loads indicate that at least one lamp is turned on. A common power supply can be used to power the lighting circuit and the indicators. Bridge modules can also be used to monitor the electrical load for different group lighting circuits and report discrete group status information to a programmable logic controller while also sharing the group status information with the other bridge modules. In this case, the indicators present combined status information, for example, indicating a maintenance status if any lamps from any group is turned on.