Magnetic assembly for generating blow-on contact force

A magnetic module for generating a blow-on force using fault current, the magnetic module comprising:

• a coil conductor having an opening through which a moving stem of a moving contact may move, wherein the coil conductor is electrically connected to the moving stem and a first auxiliary conductor, wherein the coil conductor is configured to allow current to flow from the moving stem to the first auxiliary conductor;
• a plunger constructed from magnetic attractive material attached to an end of the moving stem;
• and
• a first magnetic core shaped to fit around a first section of the coil conductor, wherein the first magnetic core is configured, when current flows through the coil conductor to the first auxiliary conductor, to become magnetized, attract the plunger in an axial direction toward the first magnetic core, and cause the moving stem of the moving contact to move toward a stationary contact.

A circuit interrupting system comprising:

• a moving stem connected to a moving contact;
• a stationary contact;
• and
• a magnetic module configured to generate a magnetic force that pushes the moving contact toward the stationary contact using fault current, the magnetic module comprising:
• a coil conductor having an opening through which the moving stem of the moving contact may move, wherein the coil conductor is electrically connected to the moving stem and a first auxiliary conductor, wherein the coil conductor is configured to allow current to flow from the moving stem to the first auxiliary conductor;
• a plunger constructed from magnetic attractive material attached to an end of the moving stem;
• and
• a first magnetic core shaped to fit around a first section of the coil conductor, wherein the first magnetic core is configured, when current flows through the coil conductor to the first auxiliary conductor, to become magnetized, attract the plunger in an axial direction toward the first magnetic core, and cause the moving stem of the moving contact to move toward the stationary contact.

A circuit interrupting system comprising:

• a moving stem connected to a moving contact;
• a stationary contact;
• and
• a magnetic module configured to generate a magnetic force that pushes the moving contact toward the stationary contact using fault current, the magnetic module comprising:
• a moving coil comprising a first moving coil arc section and attached to the moving stem of the moving contact;
• a stationary coil comprising a first stationary coil arc section that is coupled to a first auxiliary conductor;
• and
• a current transfer strap positioned to electrically connect the first moving coil arc section to the first stationary coil arc section;
• and
• wherein the moving coil, stationary coil, and current transfer strap are positioned to allow current to flow from the moving stem to the first auxiliary conductor;
• wherein the current transfer strap and the first auxiliary conductor are positioned to cause a current flow in the first stationary coil arc section in a direction opposite to a current flow in the first moving coil section;
• and
• wherein the moving coil and stationary coil are positioned such that current flow through the first moving coil arc section and the first stationary coil arc section generates a force that pushes the moving coil away from the stationary coil and the moving stem of the moving contact toward the stationary contact.