A switchboard is provided via a terminal bushing; a switchboard terminal coupled to the terminal bushing; a metering transformer bushing which is installed or released from the front part thereof through a breaker chamber, covers the switchboard terminal, and is inserted into the terminal bushing; and a metering transformer which is fastened to the metering transformer bushing and disposed on the outer circumference of the metering transformer bushing. The metering transformer includes at least one terminal that faces forward, and the metering transformer bushing may include an opening for exposing the at least one terminal to the front thereof.

A power device, 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.

A gas insulation switch cabinet and a switch device are provided. The gas insulation switch cabinet includes: a cabinet body; and a cable chamber, a breaker chamber and a busbar chamber which are in the cabinet body and configured that a current sequentially flows through the cable chamber, the breaker chamber and the busbar chamber. The gas insulation switch cabinet further includes a cable side disconnecting switch between the cable chamber and the breaker chamber in a flowing direction of the current.

A method for insulating an RC voltage divider includes installing at least one part of an active part of the voltage divider within an inner housing and insulating the at least one part of the active part with an insulating oil within the inner housing, hermetically sealing the inner housing, enclosing the inner housing in an outer housing and filling a space between the inner housing and the outer housing with an insulating gas. A system for insulating an RC voltage divider is also provided.

A switchgear device may include a frame defining an interior compartment, an electrical breaker component carried within the interior compartment, and a first optical sensor carried within the interior compartment. The switchgear device has a grounding device coupled to the electrical breaker component and being within the interior compartment. The grounding device includes a grounding switch switching between a first open state (i.e., ungrounded state) and a second closed state (i.e., grounded state), and an actuation device coupled to the grounding switch and configured to cause the grounding switch to switch between the first open state and the second closed state. The switchgear device includes a controller coupled to the electrical breaker component, the first optical sensor, and the grounding device and configured to cause the grounding switch to switch to the second closed state based upon the first optical sensor.

A switchboard monitoring system, according to one embodiment of the present specification, comprises: a thermal imaging apparatus for acquiring thermal imaging information of a device disposed in a switchboard panel; and a control apparatus for receiving the thermal imaging information from the thermal imaging apparatus, generating temperature information of the device on the basis of the received thermal imaging information, and detecting the temperature state of the device on the basis of the generated temperature information.

A current transformer arrangement for a gas-insulated switchgear is provided. The current transformer arrangement includes an adapter having a housing, the housing defining a first end connection opening, a second end connection opening and a hollow interior, a current conductor passing through the hollow interior of the adapter, and an annular current transformer core surrounding an exterior of the housing for measuring a current of the current conductor.

Assembly (1) of a busbar (20), a cable termination (40) (or an insulating element (300) or a bushing (400)) and a voltage sensor (10) in a high-voltage or medium-voltage power network. The cable termination (or the insulating element or the bushing) and the voltage sensor are mechanically and electrically connected to the busbar.

A hermetic portion on the side of a main body portion of a gas insulated switchgear and a hermetic portion of a bushing tank which has polymer bushings connected to the main body portion are configured separately, and electrical connection between the main body portion side and the bushing tank is carried out in an open portion. A mid tank is provided in the rear of the main body portion in which a switching apparatus is housed, and conductor portions which are horizontally led out from the main body portion are led into the mid tank, bent upward, and connected to bushings on the top of the mid tank. Cables are extended downward from the bottom of the bushing tank disposed above the mid tank via a support panel, and in the open portion, the cables are connected to the bushings.

Provided is a gas-insulated switchgear having a circuit breaker tank with a reduced size. The gas-insulated switchgear includes: a connection conductor connected to two or more power cables, for each phase, inside the circuit breaker tank; a solid-insulated bus placed outside the circuit breaker tank and connected to the connection conductor via a connection bushing; and an instrument current transformer attached to the solid-insulated bus.