A magnetic field tripping device

Abstract

The utility model provides a kind of excitation tripping device, including shell, tripping assembly, moving contact component, static contact, further include: normally closed circuit, normally closed terminal lug, normally open circuit, normally open terminal lug, working circuit, signal circuit, excitation coil assembly, initial state, moving contact component and normally closed terminal lug connection, static contact and moving contact component on normally open terminal lug keep a certain distance, circuit is in off state at this time;Closed state, moving contact component and static contact connection, tripping circuit conduction, normally closed terminal lug is disconnected with moving contact component, normally closed circuit is disconnected;By moving contact component is placed between normally open circuit and normally closed circuit, circuit breaker is disconnected when moving contact component and normally closed terminal lug connection, normally closed circuit and normally open circuit are all in normal working condition, circuit breaker is closed when moving contact component and normally open terminal lug connection, i.

Description

Technical Field

[0001] This invention relates to the field of low-voltage electrical technology, specifically to an excitation tripping device. Background Technology

[0002] Normally, circuits are protected by circuit breakers. Circuit breakers only trip under non-human-caused conditions when overload or short circuit occurs. However, in special circumstances, such as after a fire alarm system is triggered, to prevent the fire from spreading to non-fire-fighting load circuits (such as general lighting, air conditioning, elevators, etc.), it is necessary to remotely disconnect the circuit breaker in a reliable way. In this case, a shunt trip device is generally used to trigger the circuit breaker trip. Existing technologies cannot provide effective feedback on the tripping result after the shunt tripping action is performed, that is, they cannot substantially determine the position of the circuit breaker contacts, thus posing a risk to firefighters. Therefore, how to effectively ensure that the shunt tripping triggers the circuit breaker tripping and provides effective feedback on the position status of the circuit breaker contacts has become a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0003] To address the problem that excitation tripping cannot effectively provide feedback on the position status of circuit breaker contacts, this invention provides an excitation tripping device, which simultaneously includes a normally open circuit and a normally closed circuit. The position of the circuit breaker contacts can be directly determined by the conduction relationship between the circuit breaker contacts and the normally open and normally closed circuits.

[0004] The technical solution of the present invention is: an excitation tripping device, comprising a housing, a tripping assembly, a moving contact assembly, a stationary contact, and further comprising: A normally closed circuit for detecting the position of a moving contact assembly includes a normally closed terminal block for connecting normally closed circuit wires and a normally closed connecting piece, one end of which is connected to the normally closed terminal block and the other end of which is connected to the moving contact assembly. A normally open circuit for detecting the position of a moving contact assembly includes a normally open terminal for connecting normally open circuit wires and a normally open connecting piece, one end of which is connected to the normally open terminal and the other end of which is equipped with a stationary contact. The working circuit, used for introducing the circuit to be protected, includes a lead terminal for connecting the wires of the circuit to be protected, which is connected via a cable and a moving contact assembly. Signal circuit; used to control the access of the signal circuit, including a signal terminal for connecting the signal circuit wires; The excitation coil assembly, which is connected in series in the normally open circuit and the signal circuit, is used to trigger the tripping assembly to trip. In the initial state, the moving contact assembly is connected to the normally closed terminal block, and the stationary contact on the normally open terminal block and the moving contact assembly maintain a certain distance. At this time, the circuit is in the open state. When the circuit is closed, the moving contact assembly and the stationary contact are connected, the trip circuit is activated, the normally closed terminal block is disconnected from the moving contact assembly, and the normally closed circuit is disconnected. When under external control, the normally open circuit and signal circuit are connected, the excitation coil assembly triggers the trip assembly to trip, the moving contact assembly and the stationary contact are disconnected, and at the same time, the moving contact assembly and the normally closed terminal block are connected, the normally closed circuit is connected and the position of the moving contact assembly is fed back to the outside, indicating that the target circuit has been physically disconnected.

[0005] Furthermore, it also includes an intermediate partition, which is used to block different circuits to prevent mutual interference. The normally open circuit and normally closed circuit are located on the left side of the intermediate partition, and the working circuit and signal circuit are located on the right side of the intermediate partition.

[0006] Furthermore, when a fault occurs, the normally open circuit and signal circuit are connected, but the normally closed circuit is not connected, indicating that the target circuit has not achieved physical disconnection and / or the tripping device has failed.

[0007] The beneficial effect of this invention is that by placing the moving contact assembly between the normally open circuit and the normally closed circuit, the moving contact assembly and the normally closed terminal block are connected when the circuit breaker is open, and both the normally closed circuit and the normally open circuit are in normal working condition. When the circuit breaker is closed, the moving contact assembly and the normally open terminal block are connected. That is, the normally open circuit and the normally closed circuit simultaneously provide feedback on the position of the moving contact assembly, which can more effectively determine the circuit breaker status and better ensure electrical safety. Attached Figure Description

[0008] Appendix Figure 1 This is a structural diagram of an excitation tripping device according to the present invention; Appendix Figure 2 This is a structural diagram of an excitation tripping device according to the present invention; In the figure, 1 is the housing, 2 is the tripping assembly, 3 is the moving contact assembly, 4 is the stationary contact, 5 is the normally closed circuit, 51 is the normally closed terminal, 52 is the normally closed connecting piece, 6 is the normally open circuit, 61 is the normally open terminal, 62 is the normally open connecting piece, 7 is the working circuit, 71 is the lead terminal, 8 is the signal circuit, 81 is the signal terminal, 9 is the excitation tripping assembly, and 10 is the intermediate partition. Detailed Implementation

[0009] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0010] It should be understood that the structures, proportions, sizes, etc., illustrated in the accompanying drawings of this specification are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of the invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms "upper," "lower," "left," "right," "middle," "first," and "second" used in this specification are merely for clarity and are not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention.

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] like Figures 1-2 As shown.

[0013] An excitation tripping device includes a housing 1, a tripping assembly 2, a moving contact assembly 3, a stationary contact 4, and further includes: The normally closed circuit 5 is used to detect the position of the moving contact assembly, including a normally closed terminal 51 for connecting the normally closed circuit wires, and a normally closed connecting piece 52, one end of which is connected to the normally closed terminal 51 and the other end of which is connected to the moving contact assembly 3. Normally open circuit 6 is used to detect the position of moving contact assembly 3, including normally open terminal 61 for connecting normally open circuit wires, and normally open connecting piece 62, one end of which is connected to the normally open terminal 61, and the other end is equipped with stationary contact 4. The working circuit 7 is used for the introduction of the proposed protection circuit, including a lead terminal 71 for connecting the wires of the proposed protection circuit, which is connected through a cable and the moving contact assembly 3. Signal circuit 8, used to control the access of signal circuit, includes a signal terminal 81 for connecting signal circuit wires; The excitation coil assembly 9 is connected in series with the normally open circuit 6 and the signal circuit 8 to trigger the trip assembly 2 to trip. In the initial state, the moving contact assembly 3 is connected to the normally closed terminal block 52, and the stationary contact 4 on the normally open terminal block 52 maintains a certain distance from the moving contact assembly 3. At this time, the circuit is in the open state. When the circuit is closed, the moving contact assembly 3 and the stationary contact 4 are connected, the tripping circuit is activated, the normally closed terminal piece 52 is disconnected from the moving contact assembly 3, and the normally closed circuit 5 is disconnected. When under external control, the normally open circuit 6 and the signal circuit 8 are turned on, the excitation coil assembly 9 triggers the trip assembly 2 to trip, the moving contact assembly 3 and the stationary contact 4 are disconnected, and at the same time, the moving contact assembly 4 and the normally closed terminal piece 52 are connected, the normally closed circuit 5 is turned on and feeds back the position of the moving contact assembly 3, indicating that the target circuit has been physically disconnected.

[0014] When a fault occurs, normally open circuit 6 and signal circuit 8 are turned on, but normally closed circuit 5 is not turned on, indicating that the target circuit has not achieved physical disconnection and / or the tripping device has failed.

[0015] The intermediate partition 10 is used to isolate different circuits to prevent mutual interference. The normally open circuit 6 and normally closed circuit 5 are located on the left side of the intermediate partition, while the working circuit and signal circuit are located on the right side of the intermediate partition.

[0016] The above embodiments are merely illustrative of the principles and effects of the present invention and are not intended to limit the invention. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in the present invention should still be covered by the claims of the present invention.

Claims

1. An excitation tripping device, comprising a housing, a tripping assembly, a moving contact assembly, and a stationary contact, characterized in that, include: A normally closed circuit for detecting the position of a moving contact assembly includes a normally closed terminal block for connecting normally closed circuit wires and a normally closed connecting piece, one end of which is connected to the normally closed terminal block and the other end of which is connected to the moving contact assembly. A normally open circuit for detecting the position of a moving contact assembly includes a normally open terminal for connecting normally open circuit wires and a normally open connecting piece, one end of which is connected to the normally open terminal and the other end of which is equipped with a stationary contact. The working circuit, used for introducing the circuit to be protected, includes a lead terminal for connecting the wires of the circuit to be protected, which is connected via a cable and a moving contact assembly. A signal circuit, used to control the access of the signal circuit, includes a signal terminal for connecting the signal circuit wires; The excitation coil assembly, which is connected in series in the normally open circuit and the signal circuit, is used to trigger the tripping assembly to trip. In the initial state, the moving contact assembly is connected to the normally closed terminal block, and the stationary contact on the normally open terminal block and the moving contact assembly maintain a certain distance. At this time, the circuit is in the open state. When the circuit is closed, the moving contact assembly and the stationary contact are connected, the trip circuit is activated, the normally closed terminal block is disconnected from the moving contact assembly, and the normally closed circuit is disconnected. When under external control, the normally open circuit and signal circuit are connected, the excitation coil assembly triggers the trip assembly to trip, the moving contact assembly and the stationary contact are disconnected, and at the same time, the moving contact assembly and the normally closed terminal block are connected, the normally closed circuit is connected and the position of the moving contact assembly is fed back to the outside, indicating that the target circuit has been physically disconnected.

2. The excitation tripping device according to claim 1, characterized in that, It also includes an intermediate partition, which is used to block different circuits to prevent mutual interference. The normally open circuit and normally closed circuit are located on the left side of the intermediate partition, and the working circuit and signal circuit are located on the right side of the intermediate partition.

3. The excitation tripping device according to claim 1, characterized in that, When a fault occurs, the normally open circuit and signal circuit are connected, but the normally closed circuit is not connected, indicating that the target circuit has not achieved physical disconnection and / or the tripping device has failed.

Images