Over power protected PSU

Over power protection (OPP)

— security system that turns off the power supply when critical values of the output current are exceeded. This avoids overloading and failure of computer components. The difference between such a system and SCP (short circuit protection) is that overcurrent protection operates at a relatively low current and high resistance — that is, in a situation that is not yet a short circuit, but can damage computer parts. In addition, OPP takes into account the total current (total power) on all power channels and can work even if the current on each individual channel is within acceptable limits, but the total indicator is already above the critical value.