A relay, includes a base; a contact part disposed on the base and including two sets of movable contact parts, each set of the movable contact parts including a movable contact piece, a movable contact unit and a static contact unit, stiffnesses of two movable contact pieces are difference; a push rod assembly including a first push rod and a second push rod respectively connected to the two movable contact pieces; and a magnetic circuit part arranged on the base for driving the movements of the first push rod and the second push rod in an opposite directions, so as to drive the two movable contact pieces to come into contact or move away from each other, achieving contact or separation between the static contact unit and the movable contact unit.

A relay includes a contact part including two sets of movable contact parts, each set including a movable contact piece, a movable contact unit, a static contact unit and a movable contact leading-out piece, at least one movable contact leading-out pieces is provided with an avoidance notch; the static contact unit having the avoidance notch including at least two static contacts; and a push rod assembly including a first and second push rods, the first push rod being movably passing through the avoidance notch of one of the movable contact leading-out pieces and connected with the movable contact piece of the other the movable contact part; the second push rod being connected with the movable contact piece of the movable contact part.

A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts.

A method and apparatus using electromagnetic switching in a two-step connection process is provided to minimize surge currents and torque oscillations in three-phase motors during starts.