Digital miniature circuit breaker capable of automatically opening and closing
A miniature circuit breaker, opening and closing technology, applied in the electrical field, can solve the problems of limited breaking capacity, unsatisfactory rated current, occupying space, etc., and achieve the effect of large miniaturization, large practical value, and cost reduction.
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Embodiment 1
[0037] Such as figure 1 , figure 2 As shown, a digital miniature circuit breaker that can automatically open and close is provided, including a main circuit 1, a detection unit 2, a control module 3, an opening and closing coil control unit 4, an action unit 5, and an actuator 6. The main There is a load in circuit 1;
[0038] Wherein said action unit 5 comprises opening and closing coil 51 and moving iron core 52, and described opening and closing coil 51 is the magnetic flux valve coil, and is a single coil, and described moving iron core 52 is a kind of magnet, as figure 2 As shown, the opening and closing coil 51 is sleeved on the outside of the moving iron core 52, and the opening and closing coil 51 receives current through the opening and closing coil control unit 4, and the moving iron core 52 and the moving iron core 52 The actuator 6 is connected by transmission; when the opening and closing coil 51 is supplied with current, the opening and closing coil 51 will g...
Embodiment 2
[0057] Such as image 3 The difference between the illustrated second embodiment and the first embodiment is that the main circuit 1 is provided with a short-circuit electromagnetic tripping coil 7, and when the circuit is overloaded, the tunnel magnetoresistive sensor 21 detects an overload current, and the The control module 3 sends a tripping signal to the opening and closing coil control unit 4 to realize the opening, and when a short-circuit current is generated, the short-circuit electromagnetic tripping coil 7 generates magnetic force to drive the actuator 6 to complete the opening action; That is to say, in this embodiment, through the double-coil structure of the short-circuit electromagnetic tripping coil 7 and the opening and closing coil 51 , the responses to the short-circuit and overload situations are respectively realized.
[0058] The short-circuit electromagnetic tripping coil 7 is directly connected with the current on the main circuit 1. When a short-circui...
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