Power Supply Apparatus for Tunnel Construction

摘要

Disclosed is a power supply apparatus for the tunnel construction which decreases an amount of electric power and provides power supply in order to minimize a size and a volume of the power supply apparatus for the tunnel construction. According to an embodiment of the present invention, the power supply apparatus comprises: a housing; a high-voltage bushing equipped with an outer surface of the housing and receiving high-voltage power; a first transformer configured to be connected to the high-voltage bushing and decrease the voltage from high to intermediate; and a second transformer configured to be connected to the first transformer and decrease the voltage from intermediate to low. The first transformer provides intermediate-voltage power with a drilling machine which is used for the tunnel construction, and the second transformer provides low-voltage power with an illuminator used for the tunnel construction.