THREE-PHASE TRANSFORMER FOR GAS INSULATED METER

PROBLEM TO BE SOLVED: To provide a three-phase transformer for gas insulated meter having a disconnection mechanism capable of separating from a GIS during a voltage resistance test and easily connecting to the GIS after completion of the voltage resistance test.SOLUTION: A three-phase voltage transformation element is housed in a container charged with insulation gas sealed by an insulation spacer, and configured by: an iron core; a secondary coil wound around the iron core; a primary coil coaxially wound around the outside of the secondary coil; and an electric field relaxation shield. The three-phase transformer for gas insulated meter, for connecting and separating between an embedded conductor and the primary coil comprises: an operation mechanism provided in the container; an operation rod attached to the operation mechanism; an insulation frame attached to the operation rod; and connection conductors for three phases, attached to the insulation frame. In a connected state, the connection conductors are disposed between the embedded conductor and the primary coil,and in a disconnected state, the connection conductors are separated from between the embedded conductor and the primary coil by sliding the insulation frame.