One embodiment describes a wye-delta starter, which includes a first single pole, single current carrying path switching device that selectively connects and disconnects a first winding of a motor in a wye configuration; a second single pole, single current carrying path switching device that selectively connects and disconnects the first winding in a delta configuration, in which the first switching device and the second switching device are coupled via a first interlock; a third single pole, single current carrying path switching device that selectively connects and disconnects a second winding and a third winding of the motor in the wye configuration; a fourth single pole, single current carrying path switching device that selectively connects and disconnects the second winding in the delta configuration, in which the third switching device and the fourth switching device are coupled via a second interlock; and a fifth single pole, single current carrying path switching device that selectively connects and disconnects the third winding in the delta configuration.

One embodiment describes a wye-delta starter, which includes a first single pole, single current carrying path switching device that selectively connects and disconnects a first winding of a motor in a wye configuration; a second single pole, single current carrying path switching device that selectively connects and disconnects the first winding in a delta configuration, in which the first switching device and the second switching device are coupled via a first interlock; a third single pole, single current carrying path switching device that selectively connects and disconnects a second winding and a third winding of the motor in the wye configuration; a fourth single pole, single current carrying path switching device that selectively connects and disconnects the second winding in the delta configuration, in which the third switching device and the fourth switching device are coupled via a second interlock; and a fifth single pole, single current carrying path switching device that selectively connects and disconnects the third winding in the delta configuration.

Some embodiments of the present disclosure relate to a relay capable of preventing a chattering phenomenon, and capable of solving an unbalanced contact state occurring when contacts come in contact with each other.

The relay may include: a stationary contact having a first stationary contact and a second stationary contact; a movable contact moveable to a first position to contact the first stationary contact, and a second position to be separated from the first stationary contact; a conductive connector configured to always electrically connect the movable contact with the second stationary contact; and a driving mechanism configured to provide a driving force to the movable contact such that the movable contact is moveable to the first position or the second position.

Some embodiments of the present disclosure relate to a relay capable of preventing a chattering phenomenon, and capable of solving an unbalanced contact state occurring when contacts come in contact with each other.

The relay may include: a stationary contact having a first stationary contact and a second stationary contact; a movable contact moveable to a first position to contact the first stationary contact, and a second position to be separated from the first stationary contact; a conductive connector configured to always electrically connect the movable contact with the second stationary contact; and a driving mechanism configured to provide a driving force to the movable contact such that the movable contact is moveable to the first position or the second position.

Provided is a reliable switch having a contact surface that is prevented from being roughened. To solve the problem, there is provided a switch including a plurality of switching units 2 and 3 each including a fixed electrode and a movable electrode that is disposed to be opposed to the fixed electrode and is closed or opened with respect to the fixed electrode, the switch being characterized in that the switching units 2 and 3 each make or break a current to be applied to the switch, the switching units 2 and 3 are electrically connected in series to each other, and the switching units 2 and 3 are each configured such that a first switching unit 3 is first closed, and then a second switching unit 2 is closed.

Provided is a reliable switch having a contact surface that is prevented from being roughened. To solve the problem, there is provided a switch including a plurality of switching units 2 and 3 each including a fixed electrode and a movable electrode that is disposed to be opposed to the fixed electrode and is closed or opened with respect to the fixed electrode, the switch being characterized in that the switching units 2 and 3 each make or break a current to be applied to the switch, the switching units 2 and 3 are electrically connected in series to each other, and the switching units 2 and 3 are each configured such that a first switching unit 3 is first closed, and then a second switching unit 2 is closed.

The present invention relates to a relay (1), having a first terminal (2), a second terminal (3), a contact (4) which in a closed state brings about an electrical connection between the first and second terminals (2, 3) and which in an opened state electrically disconnects the first and second terminals (2, 3), a first electromagnet (5) which is configured in such a way that it places the contact (4) in the closed state if the first electromagnet (5) is switched on, and a second electromagnet (6) which is configured in such a way that it keeps the contact (4) in the closed state if the contact (4) is in the closed state and the second electromagnet (6) is switched on.

The present invention relates to a relay (1), having a first terminal (2), a second terminal (3), a contact (4) which in a closed state brings about an electrical connection between the first and second terminals (2, 3) and which in an opened state electrically disconnects the first and second terminals (2, 3), a first electromagnet (5) which is configured in such a way that it places the contact (4) in the closed state if the first electromagnet (5) is switched on, and a second electromagnet (6) which is configured in such a way that it keeps the contact (4) in the closed state if the contact (4) is in the closed state and the second electromagnet (6) is switched on.

Provided is a relay unit that is inexpensive and has a long life, and a method for controlling a relay circuit. A series circuit of mechanical switches is connected in series to a load and a load power supply, and a control unit selects one of the mechanical switches as a selected switch, and performs a switching timing shift, which is constituted by at least one of a first operation in which the selected switch is switched to the closed state after the mechanical switch other than the selected switch, and a second operation in which the selected switch is switched to the open state prior to the mechanical switch other than the selected switch.

Provided is a relay unit that is inexpensive and has a long life, and a method for controlling a relay circuit. A series circuit of mechanical switches is connected in series to a load and a load power supply, and a control unit selects one of the mechanical switches as a selected switch, and performs a switching timing shift, which is constituted by at least one of a first operation in which the selected switch is switched to the closed state after the mechanical switch other than the selected switch, and a second operation in which the selected switch is switched to the open state prior to the mechanical switch other than the selected switch.