High voltage bushing and insulation in insulation test

First, the high voltage casing

High-voltage bushings can be divided into three types: 1 single insulating bushing, which can be divided into pure porcelain bushings (only bushings with electric porcelain or air as internal and external insulation) and resin bushings (only resin or air) Inner and outer insulated bushings; 2 composite insulating bushings, which can be divided into oil-filled bushings (casings filled with insulating oil as main insulation bushings) and rubberized bushings (with porcelain-filled internal rubber-filled insulating mixture as the main Insulated casing), inflatable casing (the inner sleeve of porcelain sleeve is filled with SF6 and other compressed gas as the main insulation sleeve); 3 capacitive casing. It can be divided into oil-paper capacitive casing (the oil-impregnated paper is used as the main insulating material, and some foil electrodes are arranged inside to distribute the casing with uniform electric field) and the adhesive tape capacitor casing (with adhesive paper as the main insulating material, And a plurality of box-shaped electrodes are arranged inside to uniformly distribute the electric field of the casing). Figure 1-29 Figure 1-32 shows the insulation structure of these types of bushings.

         Multi-purpose pure porcelain and oil-filled casing with voltage level below 35kV; adhesive paper and oil-paper condenser casing for 66kV and above. Because the capacitive casing has good economy, not only its small size, but also the electrical equipment installed with the capacitor casing is also reduced in size and cost. Therefore, it has been mass-produced and applied in China, basically replacing the oil-filled type. casing.

Second, the insulator

         The post insulators and the suspension insulators are collectively referred to as insulators. Insulators are an insulating component that is used in a wide range, large in number, and most widely used. In operation, the insulator is subjected to the working voltage and various overvoltages; subject to mechanical stress, electromechanical load, cold and heat, deterioration of porcelain materials and the influence of the natural environment, various defects will occur. Therefore, it is required that the insulation material should meet the above performance requirements of machine, electricity and heat. Figure 1-33 Figure 1-35 shows the structure of a common insulator.

D-Subminiature Connectors

The D-subminiature or D-sub is a common type of electrical connector. They are named for their characteristic D-shaped metal shield. When they were introduced, D-subs were among the smallest connectors used on computer systems.

A D-sub contains two or more parallel rows of pins or sockets usually surrounded by a D-shaped metal shield that provides mechanical support, ensures correct orientation, and may screen against electromagnetic interference. The part containing pin contacts is called the male connector or plug, while that containing socket contacts is called the female connector or socket. The socket's shield fits tightly inside the plug's shield. Panel mounted connectors usually have threaded nuts that accept screws on the cable end connector cover that are used for locking the connectors together and offering mechanical strain relief. Occasionally the nuts may be found on a cable end connector if it is expected to connect to another cable end. When screened cables are used, the shields are connected to the overall screens of the cables. This creates an electrically continuous screen covering the whole cable and connector system.

ANTENK offers one of the most comprehensive lines of high reliability D-Subminiature connectors available for military, avionics, space and high reliability industrial applications.

Features of ANTENK D-Subminiature Connectors

1. Standard density d-subminiature connectors
2. High density d-subminiature connectors, contacts are available as well as several custom and combination versions.
3. All d-subminiature connectors may be manufactured with crimp, solder cup, straight PCB and right angle PCB terminations (except solder cup terminations on High Density configurations).

Ragne of of ANTENK D-Subminiature Connectors

Standard Density solder cup, stamped & formed contact D-subminiature connectors

D-Subminiature Connectors

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