Solid-state circuit breaker
The present disclosure provides a solid-state circuit breaker including a mounting side plate; an operating handle disposed on the mounting side plate and being rotatable relative to the mounting side plate to switch between a closing state and an opening state; a mechanical switch connected to the operating handle, wherein in a case that the operating handle is rotated by a first angle from the closing state along a rotation direction of the operating handle switched from the closing state to the opening state, the operating handle drives the mechanical switch to open; an actuating assembly disposed on the mounting side plate, wherein an end of the actuating assembly abuts against the operating handle, and the actuating assembly is rotatable relative to the mounting side plate under driving of the operating handle; and a microswitch abutting against the other end of the actuating assembly away from the operating handle, wherein in a case that the operating handle is rotated by a second angle from the closing state along the rotation direction of the operating handle switched from the closing state to the opening state, the operating handle drives the actuating assembly to rotate, and the microswitch is triggered by the actuating assembly, and the first angle is greater than the second angle.
1 . A solid-state circuit breaker comprising:
a mounting side plate;
an operating handle disposed on the mounting side plate and being rotatable relative to the mounting side plate to switch between a closing state and an opening state;
a mechanical switch connected to the operating handle, wherein when the operating handle is rotated by a first angle from the closing state along a rotation direction of the operating handle, the operation handle is switched from the closing state to a first position between the closing state and the opening state, wherein the operating handle drives the mechanical switch to open when switched to the first position;
an actuating assembly disposed on the mounting side plate, wherein an end of the actuating assembly abuts against the operating handle, and the actuating assembly is rotatable relative to the mounting side plate under driving of the operating handle;
a microswitch abutting against another end of the actuating assembly away from the operating handle, wherein when the operating handle is rotated by a second angle from the closing state along the rotation direction of the operating handle, the operating handle is switched from the closing state to a second position between the closing state and the opening state, wherein the operating handle, when switched to the second position, drives the actuating assembly to rotate such that the microswitch is triggered by the actuating assembly, wherein the first angle is greater than the second angle; and
a cam rotably connected to the mounting side plate and configured to abut against the microswitch, wherein the cam includes at least a first arc surface configured to abut against a switch arm of the microswitch, and wherein the first arc surface is configured to prevent a switch arm of the microswitch from exceeding a maximum stroke when the operating handle is rotated from the closing state to the opening state.
2 . The solid-state circuit breaker of claim 1 , wherein the first angle is greater than the second angle by at least 15 degrees to provide time for the microswitch to complete signal transmission before the mechanical switch opens, thereby avoiding generation of an electric arc at the mechanical switch.
3 . The solid-state circuit breaker of claim 1 , wherein the actuating assembly is configured to provide a direct mechanical coupling to transfer rotational movement of the operating handle to the microswitch.
4 . The solid-state circuit breaker of claim 3 , wherein the microswitch, when triggered by the actuating assembly, is configured to directly capture a position of the operating handle through the actuating assembly and open a circuit of the solid-state circuit breaker.
5 . The solid-state circuit breaker of claim 1 , wherein the actuating assembly comprises a linkage part that abuts against the operating handle, wherein the cam is disposed at an end of the linkage part near the microswitch, and wherein the cam abuts against the microswitch.
6 . The solid-state circuit breaker of claim 5 , wherein the solid-state circuit breaker further comprises a rotating shaft, and wherein the linkage part and the cam are rotatably connected to the mounting side plate through the rotating shaft.
7 . The solid-state circuit breaker of claim 6 , wherein the linkage part comprises a pair of linkage rods spaced apart from each other and a connecting portion disposed between the pair of linkage rods, wherein an abutting portion is disposed on sides of the pair of linkage rods close to each other, wherein the abutting portion abuts against the operating handle, wherein the cam is disposed at an end of a first linkage rod of the pair of linkage rods close to the microswitch, and wherein the cam is located on a side of the first linkage rod away from a second linkage rod of the pair of linkage rods.
8 . The solid-state circuit breaker of claim 7 , wherein the linkage part further comprises a mounting portion and a reset spring, wherein the mounting portion is disposed at an end of the second linkage rod near the microswitch and a mounting groove is disposed at an end of the mounting portion away from the cam, wherein the reset spring is arranged around an outer side of the rotating shaft, wherein an end of the reset spring is disposed within the mounting groove and another end of the reset spring is fixed inside the solid-state circuit breaker, and wherein reset spring is compressed when the operating handle is switched from the closing state to the opening state.
9 . The solid-state circuit breaker of claim 6 , wherein the linkage part comprises a linkage rod comprising a first side and a second side disposed opposite to each other, wherein an abutting portion is disposed on the first side, wherein the abutting portion abuts against the operating handle, and wherein the cam is disposed at an end of the linkage rod near the microswitch and is located on the second side.
10 . The solid-state circuit breaker of claim 9 , wherein the linkage part further comprises a mounting portion and a reset spring, wherein the mounting portion is disposed at an end of the linkage rod near the microswitch and extends along a direction pointing to the second side from the first side, wherein a mounting groove is disposed at an end of the mounting portion near the cam, wherein the reset spring is arranged around an outer side of the rotating shaft, wherein an end of the reset spring is disposed within the mounting groove and another end of the reset spring is fixed inside the solid-state circuit breaker, and wherein the reset spring is compressed when the operating handle is switched from the closing state to the opening state.
11 . The solid-state circuit breaker of claim 6 , wherein the cam comprises a second arc surface and one or more transition surfaces disposed between the first arc surface and the second arc surface, wherein arc centers of the first arc surface and the second arc surface are both located on a central axis of the rotating shaft, and wherein a diameter of the first arc surface is greater than a diameter of the second arc surface.
12 . The solid-state circuit breaker of claim 11 , wherein the microswitch comprises a switch contact abutting against the switch arm, wherein the switch arm abuts against the second arc surface when the operating handle is in the closing state, and when the operating handle is rotated by the second angle from the closing state, the switch arm abuts against the first arc surface and presses the switch contact, such that the microswitch is triggered.
13 . The solid-state circuit breaker of claim 11 , wherein the microswitch comprises a switch contact abutting against the switch arm, wherein the switch arm abuts against the first arc surface and presses the switch contact when the operating handle is in the closing state, and when the operating handle is rotated by the second angle from the closing state, the switch arm abuts against the second arc surface and releases the switch contact, such that the microswitch is triggered.
14 . A switching device configured to protect electrical circuits, the switching device comprising:
a mounting side plate;
an operating handle disposed on the mounting side plate and rotatable relative to the mounting side plate to switch between a closing state and an opening state;
a mechanical switch connected to the operating handle, wherein when the operating handle is rotated by a first angle from the closing state along a rotation direction of the operating handle, the operation handle is switched from the closing state to the opening state such that the operating handle drives the mechanical switch to open;
an actuating assembly disposed on the mounting side plate and configured to abut against the operation handle via one end of the actuating assembly, the actuating assembly including a linkage part and a cam that are rotatably connected to the mounting side plate, wherein the linkage part abuts against the operating handle, and the actuating assembly is rotatable relative to the mounting side plate when driven by the operating handle; and
a microswitch abutting against another end of the actuating assembly away from the operating handle, wherein when the operating handle is rotated by a second angle from the closing state along the rotation direction of the operating handle switched from the closing state to the opening state, the operating handle drives the actuating assembly to rotate such that the microswitch is triggered by the actuating assembly, wherein the first angle is greater than the second angle,
wherein the linkage part comprises a first linkage rod, a second linkage rod spaced apart from the first linkage rod, and a connecting portion disposed between the first and second linkage rods, wherein an abutting portion is disposed on sides of the first and second linkage rods and abuts against the operating handle, and wherein the cam is disposed at an end of the first linkage rod and is located on a side of the first linkage rod away from the second linkage rod.
15 . The switching device of claim 14 , wherein the mechanical switch comprises a movable contact assembly and a static contact assembly, and wherein the operating handle is connected to the movable contact assembly through an elastic part and a connecting rod.
16 . The switching device of claim 14 , further comprising:
rotating holes provided in the linkage part, the cam, and the mounting side plate, wherein the rotating holes are in respective communication with one another; and
a rotating shaft disposed within at least one of the rotating holes such that linkage part and the cam are rotatably connected to the mounting side plate through the rotating shaft.
17 . The switching device of claim 16 , wherein the rotating shaft includes a first end away from the cam, wherein the linkage part includes a reset spring arranged around an outer side of the first end of the rotating shaft, and wherein the first end extends through the second linkage rod and is located between two ends of the reset spring.
18 . The switching device of claim 14 , wherein, when the operating handle is in the closing state, the movable contact assembly and the static contact assembly are connected to one another such that the mechanical switch is closed.
19 . The switching device of claim 18 , wherein the operating handle is configured, when rotated by the first angle from the closing state, to movably drive the movable contact assembly away from the static contact assembly and separate from the static contact assembly, causing the mechanical switch to open.
20 . An actuating assembly for a solid-state circuit breaker having a mounting side plate, an operating handle disposed on the mounting side plate and rotatable along a rotation direction to switch between a closing state and an opening state, and a mechanical switch connected to the operating handle, wherein the operating handle is configured to drive the mechanical switch to open when the operating handle is rotated by a first angle from the closing state along the rotation direction of the operating handle, the actuating assembly comprising:
a linkage part configured to abut against the operating handle; and
a cam disposed at a first end of the linkage part and configured to abut against a microswitch of the solid-state circuit breaker, the microswitch abutting against an end of the actuating assembly away from the operating handle, wherein when the operating handle is rotated by a second angle from the closing state along the rotation direction towards the opening state, the actuating assembly is rotatably driven by the operating handle such that the actuating assembly triggers the microswitch, wherein the first angle is greater than the second angle,
wherein the linkage part and the cam are rotatably connected to the mounting side plate through a rotating shaft of the solid-state circuit breaker,
wherein the cam includes a first arc surface, a second arc surface having a smaller diameter than the first arc surface, and at least one transition surface disposed between the first and second arc surfaces, and wherein arc centers of the first and second arc surfaces are both located on a central axis of the rotating shaft.