Single-phase intelligent primary plug-in for low-voltage drawer switch cabinet

Abstract

The utility model discloses a single-phase intelligent primary plug-in for a low-voltage drawer switch cabinet, which comprises a circuit breaker, the wire outlet end of the circuit breaker is fixedly connected with a three-phase circuit breaker wire outlet copper bar, and one end, far away from the circuit breaker, of the three-phase circuit breaker wire outlet copper bar is respectively connected with a plug-in. The plug-in unit is flush with the corresponding circuit breaker outlet copper bar in the height direction, the plug-in unit comprises a conductive part fixedly connected with the circuit breaker outlet copper bar, the plug-in unit further comprises a mounting seat, the mounting seat is mounted on the rear wall of the drawer switch cabinet, a plurality of symmetrically arranged contacts are accommodated in a first cavity of the mounting seat, and the contacts swing under extrusion of the bus copper bar. And one end, far away from the copper busbar, of the contact clamps the conductive piece. The plug-in designed by the utility model adopts a single-phase configuration mode, and can accurately correspond to the position of a copper bar at the output end of the three-phase circuit breaker of the circuit breaker, so that the end of the output copper bar of the three-phase circuit breaker does not need to be bent downwards to the uniform height, and related copper bar parts are omitted.

Description

TECHNICAL FIELD

[0001] The utility model relates to low pressure drawer switchgear technical field, concretely is a single -phase intelligent primary plug for low pressure drawer switchgear. BACKGROUND

[0002] Low pressure drawer switchgear is applicable to power plant, petroleum, chemical industry, metallurgy, weaving, high -rise building etc. industry, as power transmission, distribution and electric energy conversion. The circuit breaker outgoing terminal fixed connection has three -phase circuit breaker outgoing copper bar in the drawer type low voltage switchgear, this three -phase circuit breaker outgoing copper bar generally passes through three -phase plug and the conduction of the busbar copper bar behind the drawer type low voltage switchgear, thereby power supply for electric equipment, because three -phase circuit breaker outgoing copper bar is staggered in the height direction, and three -phase plug is connected with three -phase busbar copper bar simultaneously, so that the outgoing terminal of three -phase circuit breaker outgoing copper bar needs to be bent to the same height and the conductive part of three -phase busbar copper bar, that is, the connection of three -phase circuit breaker outgoing copper bar and three -phase plug needs additional copper bar, and the copper consumption increases, in addition, the contact of plug contact and copper bar needs to be pressed by pressure, if the pressure is not enough, it is very easy to cause the connection place to heat excessively and damage the equipment, and the contact of plug contact and copper bar is wrapped in plastic part, and the safety hazard is not easy to be found, therefore, we propose a single -phase intelligent primary plug for low pressure drawer switchgear to solve the above technical problems. SUMMARY

[0003] The utility model aims at the shortcoming and problem in the background art and makes improvement and innovation, provides a single -phase intelligent primary plug for low pressure drawer switchgear.

[0004] A single -phase intelligent primary plug for low pressure drawer switchgear, including circuit breaker, the outgoing terminal fixed connection of circuit breaker has three -phase circuit breaker outgoing copper bar, three -phase circuit breaker outgoing copper bar is connected with a plug respectively at the end away from circuit breaker, the plug and corresponding circuit breaker outgoing copper bar are flush in the height direction, and the plug includes the conductive part fixedly connected with circuit breaker outgoing copper bar, and the plug further includes the mounting seat, the mounting seat is installed on the back wall of drawer switchgear, and the first chamber of mounting seat contains a plurality of symmetrical contacts, the contact swings under the extrusion of busbar copper bar, so that the end of contact away from busbar copper bar clamps the conductive part, temperature sensor is equipped on each plug, and the temperature sensor is electrically connected with control circuit board in drawer switchgear.

[0005] Further, the pin shaft is arranged between the bottom wall and the top wall of the mounting seat, the middle part of the contact is rotatably connected to the pin shaft, the spring sheet is installed on the side wall of the mounting seat, the end of the spring sheet away from the mounting seat abuts against the contact, and the spring sheet is connected to the inner wall of the mounting seat through the spring.

[0006] Further, the temperature sensor is arranged in the first chamber, and the temperature sensor is located between two adjacent contacts in the height direction.

[0007] Further, the mounting seat is provided with a mounting plate, the mounting plate is provided with bolt holes, and the mounting plate is mounted on the rear wall of the drawer switch cabinet by bolts.

[0008] Further, a current transformer is sleeved on the circuit breaker outgoing copper bar.

[0009] Further, the mounting seat is made of insulating material, a second chamber is further formed in the mounting seat, the second chamber is arranged outside the first chamber, a transformer coil is arranged in the second chamber, and the transformer coil is used for sensing the current passing through the contact.

[0010] Compared with the prior art, the plug-in part of the utility model adopts a single-phase configuration mode, can accurately correspond to the position of the copper bar at the output end of the three-phase circuit breaker, so that the output copper bar end of the three-phase circuit breaker does not need to be bent downward to a uniform height, and relevant copper bar components are omitted. In addition, the plug-in part is also provided with a temperature sensor, which is used for monitoring the temperature of the contact part of the plug-in part and the copper bar in real time, so as to discover potential safety problems in time. At the same time, the plug-in part can also be provided with a transformer coil, which is used for sensing the current flowing through the contact, so that a current transformer does not need to be additionally installed at the output end of the three-phase circuit breaker, and the installation space inside the drawer switch cabinet is effectively saved. BRIEF DESCRIPTION OF DRAWINGS

[0011] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the drawings needed to be used in the embodiments will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0012] Fig. 1 It is the top view structural schematic diagram provided by the first embodiment of the utility model;

[0013] Fig. 2 It is the rear view structural schematic diagram provided by the first embodiment of the utility model;

[0014] Fig. 3 It is the transverse cross-sectional structural schematic diagram of the plug-in part provided by the first embodiment of the utility model;

[0015] Fig. 4 It is the top view structural schematic diagram provided by the second embodiment of the utility model;

[0016] Fig. 5 The rear view structure schematic view provided by the second embodiment of the utility model;

[0017] Fig. 6 The vertical section structure schematic view of the plug-in provided by the second embodiment of the utility model.

[0018] The figure mark: 1, the circuit breaker; 2, the circuit breaker outgoing copper bar; 3, the current transformer; 4, the plug-in; 41, the electrically conductive piece; 42, the mounting plate; 43, the mounting seat; 44, the first chamber; 45, the contact; 46, the pin shaft; 47, the spring piece; 48, the spring; 49, the second chamber; 5, the temperature sensor; 6, the transformer coil. DETAILED DESCRIPTION

[0019] In order to make the purpose, features and advantages of the utility model more obvious and easy to understand, the specific embodiment of the utility model is described in detail below with the help of the drawings.

[0020] It should be noted that when an element is referred to as being "fixed" to another element, it can be directly on the other element or there can be intervening elements. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements can be present.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used herein, the term "and / or" includes any and all combinations of one or more of the associated listed items.

[0022] Example 1

[0023] Please refer to Figs. 1-3 The utility model provides a kind of single-phase intelligent primary plug-in for low-voltage drawer switch cabinet, including circuit breaker 1, the outgoing terminal of the circuit breaker 1 is fixedly connected with circuit breaker outgoing copper bar 2, circuit breaker outgoing copper bar 2 has three-phase, corresponding color is yellow, green, red, is A, B, C three-phase respectively.Three-phase the end of circuit breaker outgoing copper bar 2 away from circuit breaker 1 is connected with a plug-in 4 respectively, and three-phase the plug-in 4 corresponding to circuit breaker outgoing copper bar 2 is independent of each other, so that plug-in 4 can be flush with corresponding circuit breaker outgoing copper bar 2 in height direction;Therefore, the end of three-phase circuit breaker outgoing copper bar 2 does not need to be bent downward to uniform height, and then the copper bar of this downward bending can be omitted.

[0024] The plug-in 4 comprises a conductive part 41 fixedly connected with the circuit breaker outgoing copper bar 2, and further comprises a mounting seat 43, an outer surface of the mounting seat 43 is provided with a mounting plate 42, the mounting plate 42 is provided with bolt holes, the mounting plate 42 is mounted on the rear wall of the drawer switch cabinet by means of bolts, and the mounting seat 43 and the conductive part 41 can move forward and backward along with the drawer switch cabinet. The mounting seat 43 is provided with a first cavity 44, and a plurality of symmetrical contacts 45 are contained in the first cavity 44 along the height direction, the contacts 45 are arranged in two groups in the horizontal direction, and each group of contacts 45 is spaced apart from each other in the height direction. The contacts 45 swing under the extrusion of the bus copper bar, so that one end of the contacts 45 away from the bus copper bar clamps the conductive part 41. Since the contacts 45 have a certain gap between each other, the temperature sensor 5 is arranged between two adjacent contacts 45 in the height direction, and the temperature sensor 5 is electrically connected with the control circuit board in the drawer switch cabinet. Since the temperature sensor 5 is arranged, when the temperature in the plug-in 4 is too high, the temperature sensor 5 sends the monitored signal to the control circuit board, so that the temperature can be displayed or the circuit breaker 1 can be directly disconnected, and the temperature can be directly displayed on the control panel, so that the temperature of the plug-in 4 can be directly observed by the staff, and the safety performance of the product is improved. The circuit connection between the specific temperature sensor 5 and the control circuit board can adopt the prior art, that is, the temperature sensor 5 sends a signal to the control circuit board, and the original function of the circuit board is used to realize temperature display or disconnection of the circuit breaker 1.

[0025] Optionally, a pin shaft 46 is arranged between the bottom wall and the top wall of the mounting seat 43, the middle part of the contact 45 is rotatably connected to the pin shaft 46, so that the contact 45 can swing relative to the pin shaft 46; a spring sheet 47 is mounted on the side wall of the mounting seat 43, one end of the spring sheet 47 away from the mounting seat 43 abuts against the contact 45, and the spring sheet 47 is connected to the inner wall of the mounting seat 43 through a spring 48. When the drawer switch cabinet is pushed into the electrical cabinet, the bus copper bar behind the electrical cabinet will extrude the contact 45 and compress the spring sheet 47 and the spring 48, so that the contact 45 is in close contact with the bus copper bar, and at the same time, the other end of the contact 45 is in contact with the conductive part 41, so that the three-phase circuit breaker outgoing copper bar 2 of the circuit breaker 1 is in conduction with the bus copper bar; after the drawer switch cabinet is pulled out, the contact 45 can be naturally separated from the bus copper bar, and the movement of the plug-in 4 along with the drawer switch cabinet will not be affected, and at the same time, under the reset action of the spring sheet 47 and the spring 48, the other end of the contact 45 is also separated from the conductive part 41.

[0026] In the embodiment, the current transformer 3 is sleeved on the circuit breaker outgoing copper bar 2, that is, the current transformer 3 is mounted in the drawer switch cabinet, and the current transformer 3 mainly converts the primary side large current into the secondary side small current for use of the measuring instrument and the relay protection device.

[0027] Embodiment 2

[0028] As described in Embodiment 1, since the plug-in 4 adopts a single-phase configuration mode, the plug-ins 4 are independently arranged, so that the sizes of the plug-ins 4 are not restricted by each other; therefore, the current transformer 3 is not sleeved on the copper bar 2 of the circuit breaker, but a second chamber 49 is further formed on the mounting seat 43, the second chamber 49 is arranged outside the first chamber 44, the second chamber 49 and the first chamber 44 are separated from each other, the mounting seat 43 can be made of insulating plastic, and the transformer coil 6 is wound in the second chamber 49, the transformer coil 6 is used for sensing the current passing through the contact 45 in the embodiment, so that the current transformer 3 does not need to be additionally installed on the three-phase copper bar 2 of the circuit breaker, and the installation space inside the drawer switch cabinet is effectively saved.

[0029] It should be noted that the remaining parts of the embodiment are the same as Embodiment 1.

[0030] In the description of the present application, it should be understood that the orientation or positional relationship indicated by the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0031] In the description of the present application, the description of the terms "one embodiment", "some embodiments", "illustrative embodiment", "example", "specific example" or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or example.

[0032] Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. In this article, "embodiments" means that the specific features, structures or characteristics described in connection with the embodiments can be contained in at least one embodiment of the present application. The appearance of this phrase at various places in the specification is not necessarily all the same embodiments, nor is it independent or alternative to other embodiments. It can be explicitly or implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application. Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and purposes of the present application, and the scope of the present application is defined by the claims and their equivalents.

Claims

1. A single-phase intelligent primary plug-in for low voltage drawer switchgear, characterized in that: The application relates to a circuit breaker (1) which is fixedly connected with three-phase circuit breaker outgoing copper bars (2) at outgoing ends, the ends of the three-phase circuit breaker outgoing copper bars (2) away from the circuit breaker (1) are respectively connected with inserts (4), the inserts (4) are flush with the corresponding circuit breaker outgoing copper bars (2) in the height direction, the insert (4) comprises an electrically-conductive part (41) fixedly connected with the circuit breaker outgoing copper bar (2), the insert (4) further comprises a mounting seat (43) mounted on the rear wall of a drawer switch cabinet, a first chamber (44) of the mounting seat (43) contains a plurality of symmetrically-arranged contacts (45), the contacts (45) swing under the extrusion of the bus copper bar so that the ends of the contacts (45) away from the bus copper bar clamp the electrically-conductive part (41), a temperature sensor (5) is arranged on each insert (4) and electrically connected with a control circuit board in the drawer switch cabinet.

2. A single-phase intelligent primary plug-in for low voltage drawer switchgear according to claim 1, characterized in that: A pin shaft (46) is arranged between the bottom wall and the top wall of the mounting seat (43), the middle part of the contact (45) is rotationally connected to the pin shaft (46), a spring sheet (47) is mounted on the side wall of the mounting seat (43), the end of the spring sheet (47) away from the mounting seat (43) abuts against the contact (45) and is connected with the inner wall of the mounting seat (43) through a spring (48).

3. A single-phase intelligent primary plug-in for low voltage drawer switchgear according to claim 1, characterized in that: The temperature sensor (5) is mounted in the first chamber (44) and located between two adjacent contacts (45) in the height direction.

4. The single-phase intelligent primary plug-in for low voltage drawer switchgear according to claim 1, characterized in that: A mounting plate (42) is arranged on the outer surface of the mounting seat (43), bolt holes are arranged on the mounting plate (42), and the mounting plate (42) is mounted on the rear wall of the drawer switch cabinet through bolts.

5. A single-phase intelligent primary plug-in for low voltage drawer switchgear according to claim 1, characterized in that: A current transformer (3) is sleeved on the circuit breaker outgoing copper bar (2).

6. A single-phase intelligent primary plug-in for low voltage drawer switchgear according to claim 1, characterized in that: The mounting seat (43) is made of an insulating material, a second chamber (49) is further arranged on the mounting seat (43), the second chamber (49) is arranged outside the first chamber (44), a transformer coil (6) is arranged in the second chamber (49), and the transformer coil (6) is used for sensing the current passing through the contact (45).

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