Patent ID: 7027280

Claim:
A gas insulating apparatus comprising a sensor portion of a device for measuring at least either current flowing through a line from the power inlet to the power outlet or voltage of said line, and a bushing provided at least either at said power inlet or at said power outlet, wherein said sensor portion is mechanically and functionally combined with said bushing, and measurement of at least one of the current and the voltage and lead in or out of electric power are conducted in one bushing, and wherein said sensor portion of the device for measuring the current comprises an annular core member and a winding wound on said annular core member, or a current transformer comprising an annular insulating member and a winding wound on said annular insulating member, and said sensor portion of the device for measuring the voltage comprises a voltage divider for dividing electrostatically voltage between a current-carrying conductor and an electric field relaxation member arranged inside or outside a porcelain tube of said bushing and having ground potential.