The invention discloses a novel full-fiber current transformer of an isolation circuit breaker type, and the current transformer comprises a circuit breaker arc extinguish chamber (1), a full-fiber current transformer sensitive ring (2), a wiring terminal board (3), a fiber composite bushing (4), a full-fiber current transformer electrical unit (5), a polarization maintaining fiber (6), an insulating ring (7), a conducive supporting flange (8), and a transition flange (9). Through the integration of a full-fiber current transformer and an isolation-type circuit breaker, the current transformer simplifies the main power line while completing the measurement of an external current, reduces the occupied space, and improves the stability of a power grid. In addition, the polarization maintaining fiber (6) in the full-fiber current transformer is embedded into the fiber composite bushing (4) which is used for supporting the isolation-type circuit breaker, so there is no need of other insulating connection parts. The current transformer is simple and reliable in insulation, and is high in integration degree. Compared with a conventional current transformer, the current transformer is high in accuracy, is large in measurement range, and is good in transient characteristics.

Novel full-fiber current transformer of isolation circuit breaker type

The invention discloses an external integrated type all fiber optical current transformer for an isolated-type circuit breaker. The current transformer comprises fan-shaped mounting plates, a connecting terminal, a hardware fitting outer cover, a hardware fitting base plate, suspension-type insulators, a welding plate, an adjusting plate, a sensing ring, an insulation pad, an insulation sheet, a seal ring, a base mounting plate, a corrugated pipe, an electrical unit, and the like. The external all fiber optical current transformer is directly mounted on the outer side of the isolated-type circuit breaker, and the all fiber optical current transformer is wholly hung on the outer side of a flange of the isolated-type circuit breaker through the fan-shaped mounting plates, and the lower end of the all fiber optical current transformer is fixed through the base mounting plate. The current transformer disclosed by the invention has high independence, high flexibility, wide measuring dynamic range, and high frequency responsivity so as to fill up the blank of the industry in the isolated-type circuit breaker application field.

External integrated type all fiber optical current transformer for isolated-type circuit breaker

The invention discloses a three-phase total box optical electronic current mutual inductor which is adopted by GIS, includes high voltage current sensor unit, signal acquisition unit and shell, high voltage current sensing unit and signal acquisition unit are both set on the shell, among them, high voltage current sensor unit includes three full optical fiber current sensor and optical fiber cable, full optical fiber current sensor is connected to the signal acquisition unit by the cable, three full optical fiber current sensors are distributed on the shell, conductive rod goes through the center of the corresponding full optical fiber current sensor, sealed chamber is set inside the shell, inert gases are filled inside the sealed chamber, intersection between conductive rods and the corresponding full optical fiber current sensor is set inside the sealed chamber. It's less interfered by medium & strong electromagnetic in the substation, with a reliable sealing performance and insulation, and makes signal to transmit in a more stable way, assures the long-term operation stability of the actual project, effectively avoids the possibility of failure in a complex environment.

Three-phase total box optical electronic current mutual inductor which is adopted by GIS

The invention relates to a connecting flange of an equipotential shielded capacitive voltage transformer. The connecting flanges are installed on two ends of each section of a capacitor unit. An O-shaped ring sealing groove is designed in an end surface of the connecting flange, and O-shaped rings of corresponding specifications are used in cooperation, and therefore, the sealing of the capacitor unit can be realized; a circular hole is designed in the center of the connecting flange; a main capacitor supporting insulator is inserted into the circular hole vertically; and dual-layer reliable sealing of a node is realized through the sealing design of the axial O-shaped ring on the end surface and the radial O-shaped ring on the inner side surface of the connecting flange. With the connecting flange provided by the invention adopted, difficulties in assembly, storage and sealing of the capacitor unit can be eliminated, and electrical connection of a shielded capacitor inside the capacitor unit can be realized while serving as an electrode on the condition of satisfying a requirement for mechanical strength.

Connecting flange of equipotential shielded capacitive voltage transformer

The invention provides a voltage measuring device The voltage measuring device comprises a first metal shell; an insulating basin connected with the first metal shell; a voltage divider high-voltagearm arranged in the first metal shell; an inflation connector arranged on the first metal shell and used for enabling the interior of the first metal shell to be in an insulating state; a second metalshell; a voltage divider low-voltage arm arranged in the second metal shell and electrically connected with the voltage divider high-voltage arm; and a voltage collector arranged in the second metalshell and used for measuring the voltage of the voltage divider low-voltage arm One end of the voltage divider high-voltage arm is conductively connected with a central conductor of the insulating basin, and the other end of the voltage divider high-voltage arm is in insulating connection with the first metal shell

Voltage measuring device

The invention provides a combined optical transformer for a novel GIS. An all-fiber current transformer sensing ring is mounted at one end of a flange body covered by a flange cover board, and an optical voltage transformer sensing head is embedded into a chamber of the flange body; the all-fiber current transformer sensing ring is connected with an external all-fiber current transformer electric unit through a polarization-maintaining fiber; the optical voltage transformer sensing head is connected with an external optical voltage transformer electric unit through a single-mode fiber and a polarization maintaining fiber; the one end of the flange body covered by the flange cover board is mounted at one end of the external GIS through the flange cover board in an abutting mode, the other end of the flange body is mounted at the other end of the external GIS in an abutting mode; parts in the all-fiber current transformer sensing ring, such as the flange body and the flange cover board are separated by employing insulation rings to block ring current, the mounting part is sealed by employing an O-type sealing ring. The combined optical transformer for the novel GIS has advantages of compact structure, insulative, simple and reliable performance, flexible mounting and good sealing performance.

Combined optical transformer for novel GIS

The invention discloses an independent pillar combined type optical mutual inductor and belongs to the technical field of an electric power primary equipment mutual inductor. In the invention, a current transformer sensitive ring and a voltage transformer sensitive unit share a fiber composite insulation sleeve and an electrical unit so that the provided mutual inductor has the advantages of flexible application mode, small size, light weight, less land occupation, low cost and the like; a current transformer fiber is embedded in the fiber composite insulation sleeve epoxy resin pipe and extends into the electrical unit in a spiral manner so that a fiber can be embedded at a normal temperature and a normal voltage, and can be placed outside a gas chamber without influence from an SF6 gas, thus the stress of the fiber is reduced, the creepage distance along the fiber is increased, and the insulation requirements are substantially satisfied.

Independent pillar combined type optical mutual inductor

A high-voltage primary conductor multi-turn all-fiber current transformer comprises an outer cover, a sensitive ring, a hardware support, a connection terminal, a conductor multi-turn winding, an insulator, a sensing fiber, an electrical unit and a base, wherein the conductor multi-turn winding comprises a slotted current-conducting rod, an equal-length current-conducting rod, an insulating bushing, a holding conducting bar, an L-shaped current-conducting rod, an unequal-length current-conducting rod, a large washer, an insulating washer and an insulating sleeve, the connection terminal is mounted on the conductor multi-turn winding, the sensitive ring is fixed on the hardware support, the outer cover is mounted above the hardware support, both the sensitive ring and the conductor multi-turn winding are positioned inside the outer cover, one end of the sensing fiber is connected with the sensitive ring and penetrates the insulator, the other end of the sensing fiber is connected with the electrical unit, and the electrical unit is mounted in the base. The high-voltage primary conductor multi-turn all-fiber current transformer has the advantages of fine safety and low-current measurement performance, high using flexibility and frequency responsiveness, wide dynamic measurement range and the like. Particularly, the transformer has pioneering advantages in the aspect of low-current measurement, and industry blanks can be filled in.

High-voltage primary conductor multi-turn all-fiber current transformer

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Combined optical transformer for novel GIS

Independent pillar combined type optical mutual inductor

High-voltage primary conductor multi-turn all-fiber current transformer