Part 4/10:
When voltage is applied to a contactor, an electromagnet pulls a floating contact into place, thus closing the circuit. This separation of contacts in an open position is crucial because it prevents current flow and allows contactors to handle voltages up to 600 volts AC and continuous currents ranging from 40 to 50 amps. Their design accommodates high levels of arcing that naturally occur when switching heavy loads, which ensures their longevity and reliability.