APPARATUS PROTECTION SYSTEM, CONTROL INSTRUCTION DEVICE, APPARATUS PROTECTION METHOD, CONTROL INSTRUCTION METHOD, AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To enable continuous operation of multiple devices for a longer time while properly protecting the multiple devices having different voltage-withstanding abilities against surge voltage.SOLUTION: A power source switching part 510 switches a power source that supplies electric power to a first device 300 from an external power source 600 to a standby power source 700 when a first surge voltage detection part 210 detects a first surge voltage set to a predetermined voltage equal to or lower than a surge breakdown voltage of the first device 300. Further, the power source switching part 510 switches a power source that supplies electric power to a second device 400 from the external power source 600 to the standby power source 700 when a second surge voltage detection part 220 detects a second surge voltage set to a predetermined voltage equal to or lower than a surge breakdown voltage of the second device 400.