To prevent unauthorized changes to the circuit that would void the manufacturer’s warranty
To shut down the unit if it becomes too hot
To ensure that dangerous voltages are removed if the cabinet is opened✓Bonne réponse
To shut off the power supply if too much voltage is produced
Explication
A power supply cabinet can hold lethal voltages, including charge stored in filter capacitors after the supply is switched off. An interlock is a switch operated by the cover so that opening the enclosure removes the high voltage, typically together with a bleeder that discharges the capacitors.