Electromagnetic actuator

An electromagnetic actuator for operating at least one movable contact of a switch into a switched-on position or a switched-off position, the electromagnetic actuator comprising:

• a static pole body;
• a movable pole body movable relative to the static pole body;
• a first magnetic circuit including a first coil, configured to make the movable pole body and the static pole body move towards each other to a switched-on position, and a second coil configured to make the movable pole body and the static pole body move away from each other to a switched-off position;
• a second magnetic circuit including a permanent magnet configured to keep the static pole body and the movable pole body in the switched-on position;
• and
• a first spring unit configured to urge the static pole body and the movable body away from each other,
• wherein the first and second magnetic circuit are arranged concentrically,
• wherein the first spring unit includes a spring,
• wherein the spring is concentrically arranged with the first and second magnetic circuit, and
• wherein the spring is arranged between the static pole body and the movable pole body.

An electromagnetic actuator for operating at least one movable contact of a switch into a switched-on position or a switched-off position, the electromagnetic actuator comprising:

• a static pole body;
• a movable pole body movable relative to the static pole body;
• a first magnetic circuit including a first coil, configured to make the movable pole body and the static pole body move towards each other to a switched-on position, and a second coil configured to make the movable pole body and the static pole body move away from each other to a switched-off position;
• a second magnetic circuit including a permanent magnet configured to keep the static pole body and the movable pole body in the switched-on position;
• a first spring unit configured to urge the static pole body and the movable body away from each other,
• an actuator rod arranged on the movable pole body;
• and
• a second spring unit interposed in the movable pole body by interposition,
• wherein the first and second magnetic circuit are arranged concentrically, and
• wherein the second spring unit is concentrically arranged with the first spring unit.