The present invention relates to a current sensing modular system, which allows sensing the phase current and/or the ground-fault or zero-sequence current, having to that end at least a first module (7) comprising at least one phase current sensor (5) embedded therein and a second module (8) comprising a zero-sequence current sensor (6) embedded therein. According to the invention the first module (7) is independent of the second module (8), both modules (7, 8) being installed directly in the connection elements, i.e., in the connection point between at least one bushing (2) and at least one connector (4) of at least one grid cable (3).

A measuring apparatus for measuring an electrical voltage for a metal-encapsulated switchgear. The measuring apparatus has an electrical conductor, an electrically conductive measuring electrode, which surrounds a first conductor portion of the electrical conductor and is electrically insulated from the electrical conductor, and an electrically conductive field control electrode, which is electrically insulated from the electrical conductor and from the measuring electrode and which has a first field control electrode portion that surrounds the measuring electrode.

A switchgear current transformer replacement system includes a truck system having a connection section. The truck system engages with and moves along a rail system of a compartment of a switchgear. The connection section connects to a current transformer. The truck system is positioned along the rail system to a position adjacent to the current transformer so the connection section connects to the current transformer and moves it away from its operational location within the compartment of the switchgear.

A high-voltage transducer includes a housing, which spatially encloses at least one electrical measuring device and an insulating gas. The insulating gas is clean air, with which electrical insulation in the housing of the high-voltage transducer is carried out. A method for measuring with the high-voltage transducer is also provided.

The lead-in insulating device (1) of the present invention allows the passage of a live conductor (5) through a wall (18) of high-voltage electrical equipment (14), and in turn allows sensing voltage and current, for which purpose it comprises at least two electric shields (6, 7) and at least one current measurement element (12, 13), installed such that they allow detecting the presence/absence of voltage and precisely measuring the voltage and current, as well as a simple and rapid installation/removal thereof.

The present disclosure discloses an isolation device for a voltage transformer cabinet including a drive shaft; a conductive ring sleeved and fixed to the drive shaft; a movable guide rod fixed to the drive shaft and the conductive ring to swing along with a rotation of the drive shaft and electrically connected with the conductive ring; a fixing post fixedly connected to the voltage transformer; a contact, installed to the fixing post through a compression spring and electrically connected with the fixing post, and keeping in electrical contact with the conductive ring under an action of the compression spring; a closing stationary contact; and a grounded stationary contact, the rotation of the drive shaft drives the movable guide rod to swing between on position in which the movable guide rod contacts the closing stationary contact and grounded position in which the movable guide rod contacts the grounded stationary contact.

A bushing structure for a switchgear includes a mounting portion constructed and arranged to mount the bushing structure. A barrel portion extends from the mounting portion and is coaxial there-with. The barrel portion includes a plurality of undulations in a peripheral surface thereof to increase creepage distance. A primary contact is disposed within and extends a length of the barrel portion. The primary contact has a first end constructed and arranged to be contacted by a movable contact of the switchgear and a second end constructed and arranged to be connected with a busbar.

A power device is provided, which includes: an energizing conductor; a power generation unit configured to generate power that is induced by a magnetic flux of a current flowing through the energizing conductor; a power device unit configured to use the power generated in the power generation unit as a power source; a short-circuit switch capable of short-circuiting an output from the power generation unit; and a sealed container in which the energizing conductor, the power generation unit and the power device unit are included, and an insulating fluid is enclosed in the sealed container. This power device is provided as a highly reliable power device, which is used in an AC power system and does not induce an excessive voltage in the power generation unit when the power device unit is stopped in the state where the energized state of the energizing conductor is maintained.

An arrangement includes a gas insulated switchgear and a RC voltage divider. The gas insulated switchgear includes a switchgear compartment and a voltage divider compartment. The RC voltage divider and the gas insulated switchgear together at least partially form a hermetically sealed common gas compartment. A method for assembling the arrangement is also provided.

A current damper for a voltage transformer, including a first section includes at least one pair of diodes arranged in an anti-parallel configuration; a second section arranged parallel to the first section, and including at least one capacitor; and the first section and the second section being configured to be coupled between a neutral connection of the voltage transformer and a ground potential. A system for current damping includes a plurality of current dampers. A medium voltage or high voltage transformer includes a current damper, a medium voltage or high voltage switchgear including a current damper, and/or a medium voltage or high voltage switchgear including a medium voltage or high voltage transformer.