WO2013135049A1

WO2013135049A1 - Thermomagnetic circuit breaker and distribution device

Info

Publication number: WO2013135049A1
Application number: PCT/CN2012/083716
Authority: WO
Inventors: 任成�; 马成; 郑凯
Original assignee: 华为技术有限公司
Priority date: 2012-03-13
Filing date: 2012-10-30
Publication date: 2013-09-19
Also published as: EP2731122A1; CN102610456A; EP2731122A4; EP2731122B1; CN102610456B

Abstract

A thermomagnetic circuit breaker and a distribution device are applied to protect a circuit. The thermomagnetic circuit breaker comprises an insulating casing (21) and a handle (29). The insulating casing is provided therein with a component part and a wiring terminal part. The component part comprises an arc-extinguishing chamber (24), a magnetic release device(28), a bimetallic strip (27) and a releasing mechanism (25). The wiring terminal part comprises a first wiring terminal (23) and a second wiring terminal (22). The handle is hinge-connected to the releasing mechanism through a handle throughhole (211). The handle throughhole is arranged in one side surface of the insulating casing, and the insulating casing is cuboid. The wiring terminal part is arranged at the same side or the opposite side of the handle, and the longitudinal height of the wiring terminal part is less than or equal to that of the component part. The thermomagnetic circuit breaker solves the problem in the prior art that because a thermomagnetic circuit breaker occupies a larger space, it cannot be applied in a short and small space.

Description

Thermal magnetic circuit breaker and power distribution equipment

Technical field

The present invention relates to the field of circuit protection technologies, and in particular, to a thermal magnetic circuit breaker and a power distribution device. Background technique

The thermomagnetic circuit breaker is an electrical appliance that can be manually switched and automatically performs voltage loss, undervoltage, overload, and short circuit protection. The thermomagnetic circuit breaker can protect the power line and the motor. When the power line or the motor is seriously overloaded or short-circuited or under-voltage faults, the circuit can be automatically cut off. It has been widely used in the field of circuit protection technology, for example. Protection of circuits in power distribution equipment.

A thermomagnetic circuit breaker of the prior art is shown in FIG. 1. The thermomagnetic circuit breaker includes an insulative housing 11 in which a part portion 12 is disposed, and the part portion 12 includes contacts. An arc extinguishing system 121, a free trip mechanism 122, a handle 123 for operation control, a bimetal 124, and a magnetic trip mechanism 125, one side of the insulative housing 11 is provided with a handle for the handle 123 to pass through The hole 111 is pierced. A first terminal 13 and a second terminal 14 are disposed in the insulative housing 11, and the first terminal 13 is disposed on an upper side of the part portion 12 at a longitudinal height, and the second terminal 14 is disposed. Disposed on the lower side of the part portion 12, the thermomagnetic circuit breaker is connected to the external circuit through the first connection terminal 13 and the second connection terminal 14. The rear portion of the thermomagnetic circuit breaker is provided with a rail groove 15 for fixing to the outside.

At least the following problems exist in the prior art:

The thermomagnetic circuit breaker takes up a large space and cannot be used in a short space. Summary of the invention

Embodiments of the present invention provide a thermal magnetic circuit breaker and a power distribution device, which can solve the problem that the thermal magnetic circuit breaker in the prior art has a large space and cannot be used in a short space.

In order to achieve the above object, embodiments of the present invention use the following technical solutions: A thermal magnetic circuit breaker includes an insulative housing and a handle; the insulative housing is provided with a part part and a terminal part, and the part part comprises an arc extinguishing chamber, a magnetic trip unit, a bimetal, and a tripping mechanism, The terminal portion includes a first terminal and a second terminal, and the movable contact of the arc extinguishing chamber is connected to the trip mechanism through an upper end link of the trip mechanism, and the trip mechanism passes through a soft a connecting body is connected to one end of the coil of the magnetic trip unit, and the other end of the magnetic trip unit coil is connected to the bimetal and one end of the first connecting terminal through a soft connecting body, the second One end of the terminal is connected to the static contact of the arc extinguishing chamber; the handle is hinged to the trip mechanism through the handle through hole; the handle through hole is disposed on one side of the insulating case; The insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and the longitudinal height of the connecting terminal portion is less than or equal to the longitudinal height of the part portion.

A power distribution device includes a generator, a transformer, a power line, and a thermomagnetic circuit breaker, the thermomagnetic circuit breaker comprising: an insulative housing and a handle; the insulative housing is provided with a part part and a terminal part, The part part includes an arc extinguishing chamber, a magnetic trip unit, a bimetal, and a tripping mechanism, the terminal portion includes a first terminal and a second terminal, and the moving contact of the arc extinguishing chamber passes through the The upper end link of the buckle mechanism is connected to the trip mechanism, and the trip mechanism is connected to one end of the coil of the magnetic trip unit via a soft connector, and the other end of the magnetic trip coil passes through the soft connector Connected to the bimetal and one end of the first terminal, one end of the second terminal is connected to the static contact of the arc extinguishing chamber; the handle passes through the handle through hole and the trip The mechanism is hinged; the handle through hole is disposed on one side of the insulating housing; the insulating housing is a rectangular parallelepiped, and the connecting terminal portion is disposed on the same side or opposite side of the handle, and Longitudinal terminal portion of a height less than or equal to the height of the longitudinal part section.

The thermal magnetic circuit breaker and the power distribution device provided by the embodiments of the present invention, wherein the insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and the longitudinal height of the connecting terminal portion Less than or equal to the longitudinal height of the part portion. In the prior art, the first terminal is disposed on the upper side of the part portion at a longitudinal height, and the second terminal is disposed on a lower side of the part portion, so the wiring provided in the embodiment of the present invention The longitudinal height of the terminal portion is less than or equal to the longitudinal height of the part portion, enabling the height of the thermomagnetic circuit breaker to be occupied The space is reduced, making it easy to apply a thermal magnetic circuit breaker in a small space. DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any inventive labor.

1 is a schematic structural view of a prior art thermomagnetic circuit breaker;

2(a) is a schematic structural view of a thermal magnetic circuit breaker according to an embodiment of the present invention; FIG. 2(b) is a schematic structural view of a thermal magnetic circuit breaker according to an embodiment of the present invention; The schematic diagram of the structure of the thermomagnetic circuit breaker provided by the example is three;

4 is a schematic structural view of a thermal magnetic circuit breaker according to another embodiment of the present invention; FIG. 5 is a second schematic structural view of a thermal magnetic circuit breaker according to another embodiment of the present invention; FIG. 7 is a schematic structural view of a thermal magnetic circuit breaker according to another embodiment of the present invention; FIG. 8 is a thermal magnetic circuit breaker according to another embodiment of the present invention; Schematic diagram of the structure five. detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

In order to make the advantages of the technical solutions of the present invention clearer, the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

As shown in FIG. 3, a thermal magnetic circuit breaker according to an embodiment of the present invention includes an insulative housing 21 and a handle 29. The insulative housing 21 is provided with a part part and a terminal part, and the part part includes an arc extinguishing chamber 24 The magnetic trip unit 28, the bimetal 27, the trip mechanism 25, and the terminal portion include a first terminal 22 and a second terminal 23. The arc extinguishing chamber 24 includes a static contact 241, a static contact 242 and a movable contact 243, wherein one end of the static contact 241 is welded to one end of the first terminal 22, and the static contact The other end of the 241 is provided with a static contact 242 which is crimped with the movable contact 243 when a current flows through the circuit breaker, and the movable contact 243 passes through the trip mechanism 25 The upper end link is coupled to the trip mechanism 25.

The lower end link of the trip mechanism 25 is disposed at a gap between the bimetal 27 and the magnetic trip unit 28. The thermomagnetic circuit breaker is further provided with a handle 29, and the trip mechanism 25 is hinged with the handle 29, so that in the event of a failure, the trip mechanism 25 can drive the handle 29 to trip, the handle 29 The other end of the hinge end of the trip mechanism 25 passes through the handle through hole 211.

A movable iron core 281 is disposed inside the coil of the magnetic trip unit 28, and a push rod 282 is disposed inside the movable iron core 281; a soft connecting body 26 is welded to one end of the coil of the magnetic release unit 28, and the soft One end of the connecting body 26, the bimetal 27-end, and one end of the second connecting terminal 23 are welded integrally.

The handle 29 is hinged to the trip mechanism 25 via a handle through hole 211; the handle through hole 211 is disposed on one side of the insulative housing 21.

As shown in FIG. 2 (a), 2 (b), and FIG. 3, the insulating housing 21 is a rectangular parallelepiped, and the terminal portion is disposed on the same side or opposite side of the handle 29, and the terminal portion is The longitudinal height is less than or equal to the longitudinal height of the part portion.

A thermal magnetic circuit breaker according to an embodiment of the present invention, wherein the insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and a longitudinal height of the terminal portion is less than or equal to The longitudinal height of the part part. In the prior art, the first terminal is disposed on the upper side of the part portion at a longitudinal height, and the second terminal is disposed on a lower side of the part portion, so the wiring provided in the embodiment of the present invention The longitudinal height of the terminal portion is less than or equal to the longitudinal height of the part portion, so that the height space occupied by the thermomagnetic circuit breaker can be reduced, and the thermal magnetic circuit breaker can be used in a short space.

In order to enable those skilled in the art to better understand the technical solution of the present invention, the thermal magnetic circuit breaker described in FIG. 2(b) will be described in more detail below.

As shown in FIG. 3, a thermal magnetic circuit breaker according to another embodiment of the present invention includes an insulative housing 21, a handle portion 29, a part portion and a terminal portion are disposed in the insulative housing 21, the part portion includes an arc extinguishing chamber 24, a magnetic trip unit 28, a bimetal 27, a trip mechanism 25, and the terminal portion includes a first terminal 22 and a second terminal 23, one end of the first terminal 22 is soldered to the static contact 21 of the arc extinguishing chamber 24, and one end of the second terminal 23 is The bimetal 27 is welded end-to-end and connected to the magnetic release 28 via a soft connector. The handle 29 is hinged to the trip mechanism 25 via the handle through hole 211; the handle through hole 211 is disposed. On one side of the insulative housing 21, the insulative housing 21 is a rectangular parallelepiped, the terminal portion is disposed on the same side of the handle 29, and the longitudinal height of the terminal portion is less than or equal to the part portion Vertical height.

The thermal magnetic circuit breaker provided by the embodiment of the invention has a small height and can be applied to a power supply of a frame height of 1 U (1 U = 44.45 mm) or 2 U (2 U = 88.9 mm).

Specifically, the first terminal 22 and the second terminal 23 may be copper terminals or aluminum terminals, but are not limited thereto.

Further, as shown in Fig. 3, at least one of the sides of the insulating casing 21 except for one side on which the terminal portion is provided is provided with a fixing screw hole 212. Or

As shown in Fig. 4, at least one of the sides of the insulating casing 21 except for one side on which the terminal portion is provided is provided with a rail groove 214. The thermomagnetic circuit breaker can be fixed to the external environment by fixing screw holes and screws, or can be fixed by the provided guide rail groove, but is not limited thereto.

As shown in Fig. 3, a fixing screw hole 212 is provided on the side opposite to the side on which the terminal portion is provided.

Further, the first terminal 22 and the second terminal 23 may be a cage terminal, a stud terminal, a push-in screw terminal, a push-in type Q. C terminal or a bus type terminal, but are not limited thereto. this.

For example, as shown in the structural diagram of the thermomagnetic circuit breaker shown in FIG. 3, the first terminal 22 and the second terminal 23 are cage terminals.

For example, the schematic diagram of the structure of the thermomagnetic circuit breaker shown in FIG. 5, the first terminal 22 and The second terminal 23 is a stud type terminal.

For example, as shown in the structural diagram of the thermomagnetic circuit breaker shown in Fig. 6, the first terminal 22 and the second terminal 23 are push-in bolt terminals.

For example, as shown in the structural diagram of the thermomagnetic circuit breaker shown in Fig. 7, the first terminal 22 and the second terminal 23 are push-in type Q. C terminals.

For example, as shown in the structural diagram of the thermomagnetic circuit breaker shown in Fig. 8, the first terminal 22 and the second terminal 23 are bus type terminals.

Further, the material of the arc extinguishing chamber 24 may be a permanent magnet material. In this way, the thermal magnetic circuit breaker uses an arc extinguishing chamber of a permanent magnet material to quickly extinguish the arc formed during the circuit breaking, and can be applied to a DC circuit, and the thermomagnetic circuit breaker acts as a DC thermal magnetic circuit breaker. .

Further, as shown in FIG. 3, a side of the handle through hole 211 is provided with a state monitoring lead through hole 213, and the thermomagnetic circuit breaker further includes a first state monitoring lead 31 and a second state. Monitoring lead 32, one end of the first state monitoring lead 31 passes through the state monitoring lead through hole 213, and the other end of the first state monitoring lead 31 is soldered to the first connecting terminal 22, One end of the second state monitoring lead 32 passes through the state monitoring lead through hole 213, and the other end of the second state monitoring lead 31 is soldered to the second terminal 23. The external circuit of the thermal circuit breaker can be continuously monitored by connecting the external state monitoring lead and the second state monitoring lead to the external device. For example, the external device can be an indicator light, but it is not limited thereto.

Further, as shown in FIG. 3, a side of the handle through hole 211 is provided with a monitoring device 33, the monitoring device 33 and the first state monitoring lead 31 and the second state monitoring lead 32. connection. The monitoring device may be an indicator light, but is not limited thereto. By providing a monitoring device on the thermomagnetic circuit breaker, real-time monitoring of the internal circuit of the thermal magnetic circuit breaker can be performed.

In order to enable a person skilled in the art to better understand the thermomagnetic circuit breaker provided by the embodiment of the present invention, a brief description will be given below for the working process of the thermomagnetic circuit breaker.

The thermomagnetic circuit breaker can be applied to short circuit protection of a circuit, for example: When the load is short-circuited, the short-circuit current flows through the magnetic release 28 of the thermomagnetic circuit breaker, the magnetic release 28 generates an electromagnetic force, and the movable iron core 281 moves downward, and the movable iron core 281 pushes the push rod 282. Moving downward, the push rod strikes the lower end link of the trip mechanism 25, thereby pushing the movable contact 243 out of contact with the fixed contact 241 by the trip mechanism 25, causing the thermomagnetic circuit breaker to trip.

The thermomagnetic circuit breaker can also be applied to overcurrent protection of a circuit, for example:

When the load current is too large, the current flows through the bimetal 27, and after a certain period of time, the temperature of the bimetal 27 rises, because the bimetal 27 uses two metals, the expansion coefficients of the two metals. Differently, the bimetal 27 is bent toward the trip mechanism to push the trip mechanism 25, thereby pushing the movable contact 243 out of contact with the fixed contact 241, causing the thermomagnetic circuit breaker to trip.

According to another embodiment of the present invention, in the thermal magnetic circuit breaker, since the insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and the longitudinal height of the connecting terminal portion is less than or equal to The longitudinal height of the part portion. In the prior art, the first terminal is disposed on the upper side of the part portion at a longitudinal height, and the second terminal is disposed on a lower side of the part portion, so the wiring provided in the embodiment of the present invention The longitudinal height of the terminal portion is less than or equal to the longitudinal height of the part portion, so that the height space occupied by the thermomagnetic circuit breaker can be reduced, and the thermal magnetic circuit breaker can be used in a short space.

An embodiment of the present invention provides a power distribution device, including a generator, a transformer, a power line, and a thermal magnetic circuit breaker. The thermal magnetic circuit breaker includes: an insulative housing and a handle; a terminal portion, the part portion includes an arc extinguishing chamber, a magnetic trip unit, a bimetal, and a trip mechanism, wherein the terminal portion includes a first terminal and a second terminal, and the movable contact of the arc extinguishing chamber The head is connected to the trip mechanism through an upper end link of the trip mechanism, and the trip mechanism is connected to one end of the coil of the magnetic trip unit via a soft connector, and the magnetic trip unit coil is further One end is connected to the bimetal and one end of the first terminal through a soft connector, and one end of the second terminal is connected to the static contact of the arc extinguishing chamber; the handle passes through the handle through hole Hinged with the trip mechanism; the handle through hole is disposed on one side of the insulating housing.

The insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and a longitudinal height of the connecting terminal portion is less than or equal to a longitudinal height of the part portion. The specific structure of the thermomagnetic circuit breaker is the same as that of the above-described embodiment of the thermal magnetic circuit breaker, and details are not described herein again.

The thermomagnetic circuit breaker can be applied to a power distribution device with a relatively small frame, but is not limited to this.

The above is only the specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present invention. It should be covered by the scope of the present invention. Therefore, the scope of the invention should be determined by the scope of the claims.

Claims

Claim

A thermal magnetic circuit breaker comprising: an insulative housing and a handle; the insulative housing is provided with a part part and a terminal part, and the part part comprises an arc extinguishing chamber, a magnetic trip unit, a bimetal, and a strip a buckle mechanism, the terminal portion includes a first terminal and a second terminal, and the movable contact of the arc extinguishing chamber is connected to the trip mechanism through an upper end link of the trip mechanism, the trip The mechanism is connected to one end of the coil of the magnetic trip unit via a soft connector, and the other end of the magnetic trip unit coil is connected to the bimetal and one end of the first terminal through a soft connector. One end of the second terminal is connected to the static contact of the arc extinguishing chamber; the handle is hinged to the trip mechanism through the handle through hole; the handle through hole is disposed on one side of the insulating case Above; it is characterized by

The insulating housing is a rectangular parallelepiped, the terminal portion is disposed on the same side or opposite side of the handle, and a longitudinal height of the connecting terminal portion is less than or equal to a longitudinal height of the part portion.

The thermomagnetic circuit breaker according to claim 1, wherein at least one of the side faces of the insulating case except for one side surface on which the terminal portion is provided is provided with a fixing screw hole.

The thermomagnetic circuit breaker according to claim 1, wherein at least one of the side faces of the insulating case except for one side surface on which the terminal portion is provided is provided with a guide groove.

4. The thermomagnetic circuit breaker according to claim 1, wherein the first terminal and the second terminal are: a copper terminal or an aluminum terminal.

The thermal magnetic circuit breaker according to claim 1, wherein the first terminal and the second terminal are: a cage terminal, a stud type terminal, a push-in screw terminal, and a push-in Type Q. C terminal or bus type terminal.

The thermal magnetic circuit breaker according to claim 1, wherein a side surface of the handle through hole is provided with a state monitoring lead through hole;

The thermomagnetic circuit breaker further includes a first state monitoring lead and a second state monitoring lead; one end of the first state monitoring lead passes through the state monitoring lead through hole, the first shape The other end of the state monitoring lead is connected to the first terminal, and one end of the second state monitoring lead passes through the state monitoring lead through hole, and the other end of the second state monitoring lead is connected to the On the second terminal block.

The thermal magnetic circuit breaker according to claim 6, wherein a side surface of the handle through hole is provided with a monitoring device, the monitoring device and the first state monitoring lead and the The second state monitors the lead connections.

8. A power distribution apparatus comprising a generator, a transformer, a power line, and a thermomagnetic circuit breaker, the thermomagnetic circuit breaker comprising: an insulative housing and a handle; the insulative housing is provided with a part part and a terminal part The part part includes an arc extinguishing chamber, a magnetic trip unit, a bimetal, and a tripping mechanism, and the terminal portion includes a first terminal and a second terminal, and the moving contact of the arc extinguishing chamber passes through The upper end link of the trip mechanism is connected to the trip mechanism, and the trip mechanism is connected to one end of the coil of the magnetic trip unit via a soft connector, and the other end of the magnetic trip coil passes through the soft a connecting body is connected to the bimetal and one end of the first terminal, one end of the second terminal is connected to the static contact of the arc extinguishing chamber; the handle passes through the handle through hole and the The trip mechanism is hinged; the handle through hole is disposed on one side of the insulating housing;

The power distribution apparatus according to claim 8, wherein a side of the thermomagnetic circuit breaker provided with a handle through hole is provided with a state monitoring lead through hole;

The thermomagnetic circuit breaker further includes a first state monitoring lead and a second state monitoring lead; one end of the first state monitoring lead passes through the state monitoring lead through hole, and the first state monitor lead One end is connected to the first terminal, one end of the second state monitoring lead passes through the state monitoring lead through hole, and the other end of the second state monitoring lead is connected to the second terminal .

The power distribution device according to claim 9, wherein the thermal magnetic circuit breaker is provided with a monitoring device on a side of the handle through hole, the monitoring device and the first state monitoring lead And the second state monitoring lead connection.