Dual power transfer switch

A dual power transfer switch, configured to be switchable between a first power supply and a second power supply, which is characterized in that the dual power transfer switch includes:

• a first switch, including a first movable contact configured to be rotatable between a first position and a second position, wherein, in the first position, the first movable contact is used to connect the first power supply with a first stationary contact, in the second position, the first movable contact is used to connect the second power supply with a second stationary contact;
• a second switch and a power electronic switch, which are connected in parallel and then connected in series with the first switch, wherein, the second switch includes a second movable contact, and the second movable contact is configured to be switchable between a third position and a fourth position, and in both the third position and the fourth position, the second movable contact is electrically connected with a load, and the power electronic switch is configured to be switchable between an ON state and an OFF state;
• and
• a driving mechanism, configured to drive the first movable contact to switch between the first position and the second position and to drive the second movable contact to switch between the third position and the fourth position,
• wherein, in a first power supply operating mode of the dual power transfer switch, the first movable contact is in the first position, the second movable contact is in the third position, and the power electronic switch is in the OFF state;
• wherein in a second power supply operating mode of the dual power transfer switch, the first movable contact is in the second position, the second movable contact is in the fourth position, and the power electronic switch is in the OFF state;
• wherein during a switching process of the dual power transfer switch from the first power supply operating mode to the second power supply operating mode, the power electronic switch is configured to first switch to the ON state, and then the driving mechanism is configured to drive the second movable contact to switch from the third position to the fourth position, and then the power electronic switch is configured to switch to the OFF state, and the driving mechanism is configured to drive the first movable contact to switch from the first position to the second position, and drive the second movable contact to switch from the third position to the fourth position.