Tank type gas circuit breaker

A tank type gas circuit breaker for a three-phase alternating current, comprising:

• three interrupter tanks spaced in parallel with each other, said three interrupter tanks being defined by three barrel portions, a single stationary side end plate and a single mechanism side end plate;
• three stationary contacts each supported to said stationary side end plate and extending in said three interrupter tanks;
• three movable contacts each supported to said mechanism side end plate and extending in said three interrupter tanks;
• insulated rods extending in said three interrupter tanks while passing through said mechanism side end plate for interrupting contacts between said movable contacts and said stationary contacts;
• an operational rotary shaft mechanism disposed adjacent to said mechanism side end plate and connected to said insulated rods for driving each of said insulated rods;
• an actuator for driving said operational rotary shaft mechanism;
• two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said interrupter tanks;
• current transformers each arranged in a lower side of each of said bushing porcelain insulators;
• conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts;
• and
• arc-extinction gas filled in said interrupter tanks.

A tank type gas circuit breaker for a three-phase alternating current, comprising:

• a pair of end plates spaced from each other;
• three enclosures spaced from each other and disposed in parallel with each other between said pair of end plates;
• three stationary contacts each supported to one of said pair of end plates and extending in said three enclosures;
• three movable contacts each supported to the other of said pair of end plates and extending in said three enclosures;
• insulated rods extending in said three enclosures while passing through said other of said pair of end plates for interrupting contacts between said movable contacts and said stationary contacts;
• an operational rotary shaft mechanism disposed adjacent to said other of said pair of end plates and connected to said insulated rods for driving each of said insulated rods;
• an actuator for driving said operational rotary shaft mechanism;
• two bushing porcelain insulators provided for each phase, said bushing porcelain insulators being located on a top surface of each of said enclosures;
• current transformers each arranged in a lower side of each of said bushing porcelain insulators;
• conductors disposed within said bushing porcelain insulators and connected to said movable contacts and said stationary contacts;
• and
• arc-extinction gas filled in said enclosures;