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How to analyse and test the mechanical properties of terminal blocks

For terminal blocks, in the production process, mechanical performance testing is very important, then how to achieve the mechanical performance of terminal block testing? Let us know it together. Terminal with industrial automation and industrial control requirements more and more strict and precise, the amount of terminal blocks gradually rise. With the development of the electronics industry, the use of terminal blocks more and more, and more and more types. Terminal block in order to facilitate the connection of the wire and the application, it is actually a section sealed in the insulating plastic inside the metal piece, both ends have holes can be inserted into the wire, there are screws for fastening or loosening, such as two wires, sometimes need to connect, and sometimes need to disconnect, this time you can use the terminal to connect them, and can be disconnected at any time, and do not have to weld them up or wind together, very convenient and fast. UK terminals are suitable for a large number of wire interconnection, in the power industry there are special terminal blocks, terminal boxes, above all terminal blocks, single layer, double layer, current, voltage, ordinary, breakable and so on. A certain crimping area is required to ensure reliable contact, as well as to ensure that sufficient current can be passed.

1. The purpose of the voltage line reliability test is to test whether the terminals can clamp the conductors without damaging them excessively. A conductor of the specified type and rated cross-sectional area is connected to the terminal block, suspended by a certain weight and rotated at 10 revolutions per minute (<10 ± 2 r/min) for 15 min. After the test, if the conductor does not slip out of the terminal block clamp and does not break in the vicinity of the clamp, the reliability of the terminal block is acceptable. If the wire breaks or comes off the clamping mechanism of the terminal block, it is unacceptable.

2. The purpose of the mechanical strength test is to test whether the terminal block has sufficient mechanical strength, in particular the terminal housing. During the test, the sample is put into the drum of the test equipment and rotated at a speed of 5 revolutions per minute for 5 minutes, then the machine is switched off and the sample is taken out for observation, if the terminal is not damaged and the shell is not broken or damaged, etc., it is qualified.

3. The purpose of the torque test is to test whether the screw has sufficient mechanical strength to ensure that there is no slippage in the process of pressing the threads. After testing, the screw is qualified if there is no breakage or deformation and no damage to the screw head slot.

4. mechanical design life for the purpose of testing is to test the terminal block elastic components, can withstand the ability to a certain number of times of plugging and unplugging or other enterprises using mechanical equipment operations, such as spring-type terminal block button compression and release. If the system is tested after the elastic element is assembled into the terminal block, the mechanical and electrical safety performance should still meet the development requirements, is passed.

Therefore, when testing the mechanical properties of the terminal block, these details should be done to ensure its good performance.

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