The main working component of a switch is electric shock, which controls the circuit's opening and closing by closing and opening the contacts. The materials used for making contacts include copper, copper alloy, silver, silver alloy, surface silver plating, surface silver alloy, surface gold plating or gold alloy (low voltage switch)
Method for detecting switches:
Observation method:
For switches with obvious actions and intuitive contacts, direct observation and detection can be performed. Observe whether the contacts are in contact or separated, and whether the surface of the contacts is normal without damage, carbon deposition, or corrosion products
Multimeter measurement method:
For switches with contacts that are too hidden to be observed, a multimeter can be used to measure the resistance value when opening and closing, using a cutoff or resistance range.
Short circuit detection method:
The simplest detection method for switches on the line is short circuit detection. For suspected faulty switches, a pilot crossover switch can be used to test whether the backend can operate normally.
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