Large creepage small diameter CT lead terminal board for large power transformers, rectifier transformers, reactors, etc.
Small Diameter CT Multi-Terminal Board
A large creepage small diameter CT lead-out terminal board for a large power transformer, a rectifier transformer, a reactor, etc., comprising a terminal plate, a conductive rod, a conductive rod and a terminal plate are integrally formed by injection molding, and both sides of the terminal plate A boss is provided, and an electric field isolation rib is formed between each terminal on the side in contact with the air. Since the brackets are provided on both sides of the terminal plate, the strength of the terminal plate can be increased and the uniform distribution of the leads can be facilitated, and the insulation distance can be ensured, and the electric field isolation bars can block the electric field and increase the creepage distance. Therefore, the distance between adjacent terminals is small, which can meet the design requirements of multi-terminal and small diameter, and at the same time reduce the product cost.
Figure 1 is a schematic view of the structure of the CT terminal board;
Figure 2 is a cross-sectional view of Figure 1A-A;
Figure 3 is a cross-sectional view of the electric field isolation rib.
In the figure, 1 is a terminal plate, 2 is a conductive rod, 3 is a boss, and 4 is an electric field isolation rib.
As shown in the figure, this product includes CT lead terminal board and conductive rod. The terminal board 1 is made of indoor epoxy resin, modified acid anhydride as fixing agent, silicon micropowder as filler, polyether as toughening agent, benzyl dimethyl Amine as accelerator and color paste, according to indoor epoxy resin 100: fixative 100: filler 330: toughener 1.7: accelerator 0.14: color paste 1.3 ratio, after APG process, with multiple copper conductive rods 2 It is formed by injecting together, and the end of the conductive rod is the wiring terminal. The prepared terminal plate is provided with a boss 3 on the side in contact with the air and on the side of the oil, so as to increase the strength of the terminal plate, and an electric field isolation rib 4 is disposed between the terminal on the side of the terminal plate and the air contact side. Block the electric field and increase the creepage distance between the terminals.
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