LIGHTNING PROTECTION APPARATUS USING TN-C TYPE EARTHING

摘要

PURPOSE: An apparatus for protecting lightning using a TN-C type common ground is provided to prevent the damage or malfunction of a load installation cause by an electric potential difference by block lightning surge and include surge protecting circuit on input and output ends. CONSTITUTION: A surge protecting circuit(2) in an input unit is connected to a power supply unit. A surge protecting circuit(3) in an output unit is connected to a load installation. A primary side and a secondary side in a winding transformer(30) is respectively connected the surge protecting circuits. A common ground device is connected with the surge protecting circuit of the input unit, the winding transformer, the surge protecting circuit of the output unit, and the load installation and allows their all electric potentials to be an equipotential state with a reference potential.