Fuel-discharge protection system for preventing electrostatic hazard

A fuel-discharge protection system for detecting an electrostatic voltage and a ground resistance of a tank truck when said tank truck is discharging fuel into a fuel reservoir, said fuel-discharge protection system comprising:

• an oil-valve switch device positioned in a discharge pipeline between said tank truck and said fuel reservoir, said oil-valve switch device having a valve to open or close said discharge pipeline;
• an electrostatic detection and control device connected to a metallic portion of said tank truck through a first connecting cable for continuously measuring said electrostatic voltage and said ground resistance of said tank truck;
• and
• a driving device for opening and closing said valve of said oil-valve switch device through a second connecting cable;
• wherein, based on a configured operation mode, said electrostatic detection and control device controls said driving device to open said valve of said oil-valve switch device only when at least one of said electrostatic voltage and said ground resistance of said tank truck measured through said first connecting cable is within a pre-determined safety range;
• and
• said electrostatic detection and control device controls said driving device to close said valve of said oil-valve switch device when at least one of said electrostatic voltage and said ground resistance of said tank truck measured through said first connecting cable is not within said predetermined safety range.