POWER SUPPLY SYSTEM, AND MOVING OBJECT INCLUDING POWER SUPPLY SYSTEM

A power supply system includes: a power supply circuit for supplying, to a load device, DC power output from a power source device; and a detection circuit capable of selectively performing ground fault detection for connecting the power supply circuit to a ground via a capacitor to detect whether or not the power supply circuit is short-circuited to the ground based on the voltage of the capacitor, and short circuit detection for connecting, via the capacitor, a positive wire provided in the power supply circuit to a negative wire provided in the power supply circuit to detect whether or not the positive wire and the negative wire are short-circuited based on the voltage of the capacitor.