LIGHTNING PROTECTION APPARATUS USING TN-C COMMON GROUND

摘要

The present invention relates to a lightning protection apparatus using a TN-C common ground. A lightning protection apparatus using a TN-C common ground according to the present invention, which is disposed between a power source part and load facilities and is connected in series thereto in order to protect the power source part and the load facilities from lightning, includes: an input part surge protection circuit connecting to the power source part; an output part surge protection circuit connecting to the load facilities; a double winding transformer having a primary part and a secondary part, which connect to the input part surge protection circuit and the output part surge protection circuit, respectively; and common ground members connecting, respectively, to the input part surge protection circuit, the double winding transformer, the output part surge protection circuit, and the load facilities such that electric potentials applied to all of the former are the same as a reference electric potential. According to the present invention, malfunctioning of electromagnetic facilities can be prevented against overcurrent, grounding, electric leakage, and momentary short circuiting of the power source part or load facilities due to a lightning surge, to thereby save manpower. In addition, electric and electronic communication/information facilities, signal facilities, and control facilities can be efficiently operated without damage due to a lightning surge, to thereby improve economic efficiency.