Pole type three-phase high-voltage isolating switch
A high-voltage isolating switch and three-phase technology, applied in the direction of electric switches, high-voltage air circuit breakers, substations/switch layout details, etc., can solve the problems of heavy maintenance workload, complicated operation, and low contact reliability between blades and tool holders , to achieve the effect of ensuring safety
Active Publication Date: 2013-09-25
BEIJING HUADONG ELECTRIC
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Problems solved by technology
[0003] The traditional isolating switch design structure is a knife-type structure, the components are large in size and complex in structure, the contact reliability between the blade and the knife seat is not high, the operation is complicated, and the maintenance workload is large
Method used
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[0020] Refer to attached Figure 1 to Figure 4 , the main circuit of the isolating switch is composed of three-phase poles. On each phase pole, the main supporting part is the insulating bushing (8), which supports the contact seat (4) at the feed-out end of the high-voltage live parts of the isolating switch. , the contact base (10) at the power supply end, and the conductive rod (6), so that the insulation requirements between the high-voltage live parts and the grounded mounting plate (7) are met. There is a mounting flange in the middle of the insulating bushing (8), and the three-phase poles of the disconnector are assembled together through the mounting plate (7), and installed on the cabinet body of the switch cabinet, and the feeder is connected through the mounting plate (7). The outlet contact seat (4) is completely separated from the power source contact seat (10), which improves the safety of the product.
[0021] Through the axial movement of the conductive rod (...
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The invention discloses a novel pole type three-phase high-voltage isolating switch, each phase of the isolating switch is provided with an insulating sleeve for supporting conductive elements of contact pedestals of two poles of the isolating switch; a mounting flange is arranged in the middle of an insulating cylinder, the insulating switch is fixed, and the two poles of the isolating switch are separated through a mounting plate; a conductive rod moves along the axial direction in the insulating cylinder and is used for disconnecting or connecting the two poles of the isolating switch, and the axial motion of the conductive rod is provided by relying on one insulating driving frame; and the contact between the conductive rod and the contact pedestals adopts circular spring conductive rings, and the contact pressure between a moving contact and a fixed contact is realized through the compression deformation of the conducting rings. The isolating switch can be used for three-phase alternating current 50Hz high-voltage switch cabinets at 12kV and below, lead the power supply side and the load side of a high-voltage switch device to form a reliable voltage isolation break when carrying out overhauling on the device and a load circuit, and further ensure the safety of an operator.
Description
technical field [0001] The invention relates to a high-voltage isolating switch, in particular to a novel pole-type three-phase high-voltage isolating switch. Background technique [0002] The isolation function is one of the main functions in the high-voltage switchgear. Its role in the switchgear is to reliably isolate the high-voltage power supply when the user performs maintenance on the switchgear or the electrical equipment connected to the switchgear. , to ensure the safety of the operator. Due to the different realization of the isolation function, the high-voltage switch is divided into two types: fixed type and removable type. In the fixed switchgear, the parts that realize the isolation function are designed as a single isolating switch, and the removable switchgear divides the parts with the isolation function into two parts, the circuit breaker and the switch cabinet body. High-voltage switchgear has undergone a development process from fixed to removable. Th...
Claims
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IPC IPC(8): H01H31/00H02B1/056
Inventor 王怀新邓会恩王钰洲
Owner BEIJING HUADONG ELECTRIC