Vacuum interrupter

A vacuum interrupter comprising:

• a cylindrical insulation container, a fixed side electrode arranged in an inside of the insulation container, and a movable side electrode which is arranged in the inside of the insulation container and is brought into contact with and separated from the fixed side electrode,
• wherein the fixed side electrode and the movable side electrode each have a contact;
• at least either the fixed side electrode or the movable side electrode includes:
• a power feeding plate having a circular arc shaped power feeding portion formed on an outer circumference of a disk portion, and a coil electrode in which a circular arc shaped coil portion along an outer circumferential edge of the contact is arranged being divided in plurality by a slit on a rear surface side of the power feeding plate and in which a circular arc protrusion portion whose circumferential length is shorter than a circumferential length of a circular arc shaped portion of the circular arc shaped power feeding portion is fixed at a position of the circular arc shaped coil portion, the position being faced to the circular arc shaped power feeding portion;
• and
• wherein when the power feeding plate and the coil electrode are provided on the fixed side electrode, the fixed side electrode includes:
• a fixed side contact which is formed in a disk shape and is formed with a fixed side contact back spot facing portion on a back surface, a fixed side power feeding plate which is fixed to an inner surface of the fixed side contact back spot facing portion of the fixed side contact and has a fixed side circular arc shaped power feeding portion formed on an outer circumference of a disk shaped fixed side disk portion along an outer circumferential edge, and a fixed side coil electrode in which a fixed side circular arc shaped coil portion along an outer circumferential edge of the fixed side contact is arranged being divided in plurality by a fixed side slit on a rear surface side of the fixed side power feeding plate;
• a fixed side reinforcing member, which has a fixed side disk portion and a fixed side strut portion, in which the fixed side disk portion is brought into contact with the fixed side power feeding plate, and in which the fixed side strut portion is fixed to a fixed side energization rod, is included;
• a fixed side cavity is formed between the fixed side contact back spot facing portion and the fixed side circular arc shaped power feeding portion;
• a fixed side power feeding plate float portion is formed as a cutout in a rear surface of the fixed side circular arc shaped power feeding portion of the fixed side power feeding plate, and a fixed side float portion air gap is formed between the fixed side power feeding plate float portion and the fixed side circular arc shaped coil portion;
• and
• wherein when the power feeding plate and the coil electrode are provided on the movable side electrode, the movable side electrode includes:
• a movable side contact which is formed in a disk shape and is formed with a movable side contact back spot facing portion on a back surface, a movable side power feeding plate which is fixed to an inner surface of the movable side contact back spot facing portion of the movable side contact and has a movable side circular arc shaped power feeding portion formed on an outer circumference of a disk shaped movable side disk portion along an outer circumferential edge, and a movable side coil electrode in which a movable side circular arc shaped coil portion along an outer circumferential edge of the movable side contact is arranged being divided in plurality by a movable side slit on a rear surface side of the movable side power feeding plate;
• a movable side reinforcing member, which has a movable side disk portion and a movable side strut portion, in which the movable side disk portion is brought into contact with the movable side power feeding plate, and in which the movable side strut portion is fixed to a movable side energization rod, is included;
• a movable side cavity is formed between the movable side contact back spot facing portion and the movable side circular arc shaped power feeding portion;
• a movable side power feeding plate float portion is formed as a cutout in a rear surface of the movable side circular arc shaped power feeding portion of the movable side power feeding plate, and a movable side float portion air gap is formed between the movable side power feeding plate float portion and the movable side circular arc shaped coil portion.

A vacuum interrupter comprising:

• a cylindrical insulation container, a fixed side electrode arranged in an inside of the insulation container, and a movable side electrode which is arranged in the inside of the insulation container and is brought into contact with and separated from the fixed side electrode;
• wherein the fixed side electrode and the movable side electrode each have a contact;
• at least either the fixed side electrode or the movable side electrode includes:
• a power feeding plate having a circular arc shaped power feeding portion formed on an outer circumference of a disk portion, and a coil electrode in which a circular arc shaped coil portion along an outer circumferential edge of the contact is arranged being divided in plurality by a slit on a rear surface side of the power feeding plate and in which a circular arc protrusion portion whose circumferential length is shorter than a circumferential length of a circular arc shaped portion of the circular arc shaped power feeding portion is fixed at a position of the circular arc shaped coil portion, the position being faced to the circular arc shaped power feeding portion;
• and
• a cavity is formed between the contact and the circular arc shaped power feeding portion, a circular arc shaped first groove portion is formed on a termination end portion of the circular arc shaped coil portion of the coil electrode, a circular arc shaped second groove portion that is deeper than a depth of the circular arc shaped first groove portion is formed on a beginning end portion of the circular arc shaped coil portion of the coil electrode which sandwiches a slit, the circular arc shaped power feeding portion of the power feeding plate is arranged over the circular arc shaped first groove portion and the circular arc shaped second groove portion, the circular arc shaped power feeding portion of the power feeding plate is fixed to the circular arc shaped first groove portion, and a groove portion air gap is formed between the circular arc shaped power feeding portion of the power feeding plate and the circular arc shaped second groove portion.