Modular arc chamber assembly

A modular arc chamber assembly suitable for use in a cassette assembly in a circuit breaker comprising:

• an electrically insulative first side member wherein said first side member includes an upper end and a lower end,
• an electrically insulative second side member wherein said second side member includes an upper end and a lower end,
• a defined portion in at least one side member for positioning said side member in a complementary pocket of the cassette assembly;
• a plurality of plates disposed between said first and second side members and arranged in a stacked spaced-apart relationship,
• a first arc runner plate disposed between said first and second side members at said upper end substantially parallel to said plurality of plates, said first runner plate having a tab angled and extending therefrom;
• and
• a second arc runner plate disposed between said first and second side members at said lower end wherein said second arc runner plate is in close proximity with a stationary contact of said circuit breaker.

A cassette assembly suitable for use in a circuit breaker comprising:

• a first electrically insulative cassette half piece having an inner surface, said inner surface having a first recess formed therein;
• a second electrically-insulative cassette half piece having an inner surface, said second electrically insulative cassette half piece arranged for mating with said first electrically insulative cassette half piece;
• and,
• a first arc chamber assembly arranged between said first and second electrically insulative cassette half pieces, said first arc chamber assembly including:
• a first side member,
• a second side member,
• a defined portion in at least one side member for positioning said first side member in a complementary pocket of the cassette assembly,
• a plurality of plates disposed between said first and second side members and arranged in a stacked spaced-apart relationship, and
• an arc runner plate disposed between said first and second side members and arranged at one end of said plurality of plates.

A circuit breaker assembly comprising:

• a first electrically insulative cassette half piece having an inner surface, said inner surface having a first recess and a second recess formed therein;
• a second electrically-insulative cassette half piece having an inner surface, said second electrically insulative cassette half piece arranged for mating with said first electrically insulative cassette half piece;
• a first arc chamber assembly arranged between said first and second electrically insulative cassette half pieces, said first arc chamber assembly including:
• a first side member,
• a second side member,
• a defined portion in said first side member for positioning said first side member in a complementary pocket within first recess of said first electrically insulative cassette half piece,
• a plurality of plates disposed between said first and second side members and arranged in a stacked spaced-apart relationship,
• an arc runner plate disposed between said first and second side members and arranged at one end of said plurality of plates,
• a second arc chute assembly arranged between said first and second electrically insulative cassette half pieces, said second arc chute assembly including:
• a third side member,
• a fourth side member,
• a defined portion in said third side member for positioning said third side member in a complementary pocket within said second recess of said first electrically insulative cassette half piece,
• a plurality of plates disposed between said third and fourth side members and arranged in a stacked spaced-apart relationship,
• an arc runner plate disposed between said third and fourth side members and arranged at one end of said plurality of plates,
• a line-side contact strap arranged for connection with an electric circuit, said line-side contact strap including a first fixed contact connected to said line-side contact strap, said first arc chamber assembly proximate said line-side contact strap for quenching arcs,
• a load-side contact strap arranged for connecting with associated electrical equipment, said load-side contact strap including a second fixed contact connected to said load-side contact strap, said second arc chamber assembly proximate said load-side contact strap for quenching arcs,
• a rotor defining first and second opposing sides thereon, and,
• a moveable contact arm intermediate said first and second sides, said moveable contact arm defining a first moveable contact at one end arranged opposite said first fixed contact and a second movable contact at an end opposite said one end arranged proximate said second fixed contact, said rotor and said moveable contact arm being retained intermediate said first and second electrically insulative cassette half pieces.