Patent ID: 8729984

Claim:
A magnetic actuator for opening a contact to interrupt a flow of current, the actuator comprising: a first armature and a second armature, the first armature and the second armature spaced apart by a first gap while in a reset position; the second armature and a core spaced apart by a second gap while in the reset position; a plunger, the plunger having a plunger first end and a plunger second end, the plunger extending through the second armature, the first armature to push the plunger through the second armature until the first gap closes; in a tripped position, the first gap between the first armature and the second armature is closed, and with the first gap closed, the second gap between the second armature and the core is closed, and the contact is open; and a plunger gap between the plunger second end and a push rod, the plunger gap to close before the first gap closes and before the second gap closes.