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Why do button switches need to be connected to relays?

In the use of button switch, sometimes the relay is connected, so why? Now the button switch manufacturer will tell you.
 
In the case of rich electric induction, reverse induction voltage will occur. The higher the voltage is, the greater the energy is, the greater the consumption and relocation of the contact will be. Therefore, it is necessary to admit the rated conditions and mark the control capacity in the rated value, but these are not enough. In the special load circuits such as the voltage, current waveform and load variety during connection and blocking, it is necessary to conduct them separately Verification and admission of internship equipment. Products for fine load shall be used for occasions with fine voltage and current. The use of commonly used silver contacts may reduce the contact reliability. Therefore, to ensure the performance of the button switch, when the button switch exceeds the micro and high load type of the button switch plan, please connect the relay suitable for the load.

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