What is the primary function of a bypass switch in a circuit?

The primary function of a bypass switch in a circuit is to allow current to bypass a faulted element. This capability is crucial in maintaining the overall operation of the circuit by providing an alternative path for the current to flow when a component malfunctions or becomes inoperative. By using a bypass switch, technicians can ensure that the rest of the circuit remains functional, thus minimizing downtime and facilitating easier troubleshooting and maintenance.

This function is particularly valuable in various applications, such as in industrial setups where uninterrupted power supply is critical. It helps to isolate the defective part without shutting down the entire system, allowing for repairs to be made while keeping other circuits operational.

The other options refer to functions not typically associated with a bypass switch. Increasing circuit voltage, disconnecting the entire circuit, or converting AC to DC are roles fulfilled by other components or systems, rather than a bypass switch. Consequently, the operational emphasis of a bypass switch distinctly highlights its role in circumventing faults while sustaining circuit integrity.