Mains operated safety protection system

The utility model provides a mains operated safety protection system is applied to DP3 deep sea engineering boat, the system includes: a plurality of equipment closed region are equipped with a plurality of equipment in each equipment closed region, correspond respectively for each a plurality of panels of the equipment power supply in the equipment closed region, wherein, the interior a pluralityof equipment of equipment closed region lie in the power supply of different sectionalized panels by two, install in each equipment closed region, correspond respectively and detect the detection sensor of intaking of whether intaking in each equipment closed region. The utility model discloses in a plurality of equipment in equipment closed region by the power supply of the sectionalized panel of difference, through install the detection sensor of intaking of whether intaking in the check out test set closed region in equipment closed region to delivering to into water with sensor signal through the cable and survey