... filler tube ,oil vent plug.6. Power supply: Rated output 7. There are fuses in power input terminal and output terminal. When ... there is overload or short, will cut off the power. Anti-lightning Protection .The input terminal and output terminal are ... include the doors of tank are open, power supply fault, overheating, over current, overvoltage, power line lack . etc.10. RTU interface: Voltage, ...