The terminals are usually made of metal materials with different coefficients of thermal expansion. If the thermal element of the bimetallic material is heated, the bending will occur due to the difference in expansion coefficient. The thermal components are connected in series in the main circuit of the circuit (eg in the motor supply circuit of the motor starter). Up and down the two rows of three terminals, each heat element were connected to a connection between the two terminals, a total of three thermal components, respectively, in series on the motor's three power input line. Auxiliary contact, usually a normally open (NO), a normally closed (NC) contact. Used in the control circuit of the motor starter.
Terminals of the metal material We used all the electrolytic copper as a basic material, the composition of the parts such as crimping boxes, screws, all the use of copper conductor, which we use the copper conductor, screw and crimping box is used Brass (H62). Copper has excellent metal processing characteristics and high corrosion resistance; copper has excellent electrical conductivity, second only to silver, and the surface of the metal parts of the company is protected by tin and nickel plating.
Terminals as the electrification process than the essential electrical connectors, its application is very extensive, manufacturing all of its raw materials are also very particular about every year just a variety of terminal manufacturing, you need to consume very large raw materials for the terminal manufacturers For example, different types of terminals, the required manufacturing of raw materials is different, the performance of the terminal performance is also different, all types of raw materials used to manufacture the terminal, depending on the need to produce the terminal application environment.
