Patent ID: 7256977

Claim:
A thunderbolt disaster protecting apparatus comprising: a thunderbolt resisting transformer; a thunderbolt attack detecting circuit for determining whether or not any thunderbolt is approaching by detecting a thunderbolt signal; and a switching mechanism for changing over to the normal condition in which a protection object device is connected to an electric path or to the thunderbolt resisting condition in which said protection object device is connected to the electric path through said thunderbolt resisting transformer, wherein said thunderbolt attack detecting circuit and said switching mechanism obtain a control power supply from said electric path and said thunderbolt attack detecting circuit changes over said switching mechanism to said normal condition at the time of normal condition and when any thunderbolt is approaching, changes over said switching mechanism to said thunderbolt resisting condition, and wherein when said switching mechanism is in said normal condition, said thunderbolt resisting transformer is disconnected from said electric path to eliminate power consumption by said thunderbolt resisting transformer.