Overvoltage protection metering cabinet

Abstract

The utility model provides an overvoltage protection metering cabinet, and relates to the technical field of metering cabinets. An overvoltage protection metering cabinet comprises a cabinet body and a voltage transformer, a voltage sensor, a fuse, a current transformer, an incoming and outgoing line sleeve, a voltage-sharing cover and a voltage-sharing cap which are installed in the cabinet body, the voltage transformer is fixed on the inner top wall of the cabinet body, the voltage sensor is fixed in the middle of the inner wall of the cabinet body, and the fuse is fixed on the fuse. The fuse is installed between the voltage transformer and the voltage sensor, the voltage-sharing cover is installed at one end, provided with the fuse, of the voltage sensor, the wire inlet and outlet sleeve is fixed on the inner side wall of the cabinet body, and the current transformer is fixed on the inner bottom wall of the cabinet body. Through the design of the voltage-sharing cover, the maximum value of the local electric field intensity can be transferred to the outside of the equipment, so that the insulation pressure in the equipment is reduced, the overall insulation performance is improved, in addition, the voltage-sharing cover can help maintain the dry environment in the equipment, and the reduction of the insulation performance caused by moisture is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to a metering cabinet, in particular to an overvoltage protection metering cabinet, belongs to metering cabinet technical field. BACKGROUND

[0002] Metering cabinet, install special metering table (device) cabinet, be called metering cabinet, metering cabinet in our country generally refers to electric energy metering cabinet, according to the specification of the term definition in "electric energy metering cabinet", electric energy metering cabinet: special cabinet type electric energy metering device (electric energy metering device), electric energy metering device: the general term of all electrical equipment, electrical part and mechanical structure combination that measure electric energy, in order to facilitate regular calibration and maintenance current transformer and potential transformer contained in metering cabinet, metering cabinet can only be made into air insulation.

[0003] A kind of convenient metering cabinet of Chinese patent announcement No.CN205004641U, including metering cabinet body, several lifting lugs are arranged on the top of metering cabinet body, the front of metering cabinet body is provided with outer door, inner door is arranged in the inner side of outer door, outer door is connected with metering cabinet body by lock, inner door is connected with metering cabinet body by lock catch device, and insulating layer is arranged outside the inner door;Visual window is arranged on the outer door, and several dial window is arranged on the inner door.

[0004] But the inventor of the above-mentioned device believes that there are certain defects, the above-mentioned device uses air to isolate insulation, and the phase-to-phase and phase-to-ground all require sufficient isolation distance, on the one hand, the insulation performance is not high, on the other hand, it will cause the cabinet size to be large, resulting in large overall volume, therefore, the utility model provides an overvoltage protection metering cabinet. UTILITY MODEL CONTENTS

[0005] The utility model aims to solve the above-mentioned problems and provide an overvoltage protection metering cabinet to solve the problem of low insulation performance and large overall volume in the prior art.

[0006] The utility model is realized by the following technical scheme: an overvoltage protection metering cabinet, including cabinet body and voltage transformer, voltage sensor, fuse, current transformer, incoming and outgoing line bushing, voltage grading shield and voltage grading cap installed in the inside of cabinet body, the voltage transformer is fixed on the inner top wall of cabinet body, the voltage sensor is fixed on the middle part of the inner wall of cabinet body, the fuse is installed between the voltage transformer and the voltage sensor, the voltage grading shield is installed on one end of the voltage sensor provided with the fuse, the incoming and outgoing line bushing is fixed on the inner side wall of cabinet body, the current transformer is fixed on the inner bottom wall of cabinet body, one end of the incoming and outgoing line bushing is connected with the current transformer through CT copper bus, the one end of the incoming and outgoing line bushing is provided with the voltage grading cap, and one end of the voltage sensor is connected with the current transformer through PT copper bus.

[0007] Preferably, both the inner side walls of the cabinet body are fixedly connected with side plates, the number of the access line bushings is six, and every three access line bushings are fixed on a side plate.

[0008] Preferably, one end of the voltage equalizing cover, the fuse and the PT copper bus are fixed at one end of the voltage sensor by the first screw, and the voltage equalizing cover is fixed at one end of the fuse by the first screw.

[0009] Preferably, one end of the CT copper bus and the voltage equalizing cap are fixed at one end of the access line bushing by the second screw, and the voltage equalizing cap is installed at one end of the voltage equalizing cap by the second screw.

[0010] Preferably, the number of the voltage transformers is three, and the voltage transformers are sequentially arranged from left to right.

[0011] Preferably, the number of the voltage sensors is three, and the voltage sensors are sequentially arranged from left to right.

[0012] Preferably, the number of the current transformers is three, and the current transformers are sequentially arranged from front to back.

[0013] The utility model provides a kind of overvoltage protection metering cabinet, it has the beneficial effects as follows:

[0014] The device can transfer the maximum value of local electric field intensity to the outside of the equipment by the design of the voltage equalizing cover, thereby reducing the insulation pressure inside the equipment and improving the overall insulation performance.In addition, the voltage equalizing cover can also help maintain a dry environment inside the equipment and reduce the decline in insulation performance due to moisture. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 It is the cabinet body inside perspective view of the utility model;

[0016] Figure 2 It is the voltage equalizing cover installation explosion drawing of the utility model;

[0017] Figure 3 It is the voltage equalizing cap installation explosion drawing of the utility model;

[0018] Figure 4 It is the voltage sensor installation structure schematic view of the utility model.

[0019] MAIN COMPONENT SYMBOL EXPLANATION

[0020] 1, cabinet; 2, voltage transformer; 3, voltage sensor; 4, fuse; 5, current transformer; 6, side plate; 7, access line bushing; 8, voltage equalizing cover; 81, PT copper bus; 82, first screw; 9, voltage equalizing cap; 91, CT copper bus; 92, second screw. DETAILED DESCRIPTION

[0021] The utility model discloses an overvoltage protection metering cabinet.

[0022] Please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4 An overvoltage protection metering cabinet, comprising a cabinet body 1 and a voltage transformer 2, a voltage sensor 3, a fuse 4, a current transformer 5, an incoming and outgoing line bushing 7, a voltage equalizing cover 8 and a voltage equalizing cap 9 installed in the cabinet body 1, the voltage transformer 2 is fixed on the inner top wall of the cabinet body 1, the number of voltage transformers 2 is three, arranged in order from left to right, the voltage sensor 3 is fixed on the middle part of the inner wall of the cabinet body 1, the number of voltage sensors 3 is three, arranged in order from left to right, the fuse 4 is installed between the voltage transformer 2 and the voltage sensor 3, the number of fuses 4 is three, the voltage equalizing cover 8 is installed on one end of the voltage sensor 3 provided with the fuse 4, two open grooves are formed on the voltage equalizing cover 8, one open groove is upward according to the installation position of the fuse 4

[0023] Please refer to Figure 1 And Figure 3 The incoming and outgoing line bushing 7 is fixed on the inner side wall of the cabinet body 1, both inner side walls of the cabinet body 1 are fixedly connected with side plates 6, the number of incoming and outgoing line bushings 7 is six, every three incoming and outgoing line bushings 7 are fixed on the side plate 6 as a group, the incoming and outgoing line bushing 7 is in L shape, the current transformer 5 is fixed on the inner bottom wall of the cabinet body 1, the number of current transformers 5 is three, arranged in order from front to back.

[0024] Please refer to Figure 1 And Figure 3 One end of the incoming and outgoing line bushing 7 is provided with the voltage equalizing cap 9, one end of the incoming and outgoing line bushing 7 and the current transformer 5 are connected through a CT copper bus 91, one end of the CT copper bus 91 and the voltage equalizing cap 9 are fixed on one end of the incoming and outgoing line bushing 7 through a second screw 92, the voltage equalizing cap 9 is installed on one end of the voltage equalizing cap 9 through the second screw 92, an open groove is formed on the voltage equalizing cap 9, and the open groove is parallel to the direction of the CT copper bus 91 during installation.

[0025] Please refer to Figure 1 、 Figure 2 、 Figure 3 And Figure 4One end of the voltage sensor 3 and the current transformer 5 are connected through the PT copper bus 81, and the other open slot is parallel to the position of the PT copper bus 81 according to the safety distance requirement and direction requirement of the PT copper bus 81, the position of the opening is parallel to the position of the PT copper bus 81, the voltage grading shell 8, one end of the fuse 4 and one end of the PT copper bus 81, the voltage grading shell 8 is fixed on one end of the voltage sensor 3 through the first screw 82, the voltage sensor 3 is arranged on one side of the voltage grading shell 8, one end of the fuse 4 and one end of the PT copper bus 81 are installed in the voltage grading shell 8, and the clamping ring of the fuse 4 is installed close to the inner side wall of the voltage grading shell 8.

[0026] Working principle: The electrical gap refers to the shortest spatial distance measured between two conductive parts or between the conductive part and the device protection interface. That is, under the condition of ensuring stable and safe electrical performance, the shortest distance through which insulation can be achieved through air, under the condition of relatively compact internal size of the cabinet 1, in order to meet the safety distance requirement, the voltage grading shell 8 and the voltage grading cap 9 are adopted, through the design of the voltage grading shell 8, the maximum value of the local electric field intensity can be transferred to the outside of the device, thereby reducing the insulation pressure inside the device and improving the overall insulation performance. In addition, the voltage grading shell 8 can also help maintain a dry environment inside the device and reduce the decline in insulation performance caused by moisture.

[0027] The above shows and describes the basic principle and main features of the utility model and the advantages of the utility model. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and descriptions in the specification are only to illustrate the principle of the utility model, and various changes and improvements can be made to the utility model without departing from the spirit and scope of the utility model, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. An overvoltage protection metering cabinet comprising a cabinet body (1) and a voltage transformer (2), a voltage sensor (3), a fuse (4), a current transformer (5), an incoming and outgoing line bushing (7), a voltage equalizing cover (8) and a voltage equalizing cap (9) installed inside the cabinet body (1), characterized in that: The voltage transformer (2) is fixed on the inner top wall of the cabinet (1), the voltage sensor (3) is fixed on the middle part of the inner wall of the cabinet (1), the fuse (4) is installed between the voltage transformer (2) and the voltage sensor (3), the voltage equalizing cover (8) is installed on one end of the voltage sensor (3) provided with the fuse (4), the incoming and outgoing line sleeve (7) is fixed on the inner side wall of the cabinet (1), the current transformer (5) is fixed on the inner bottom wall of the cabinet (1), one end of the incoming and outgoing line sleeve (7) is connected with the current transformer (5) through the CT copper bus (91), the incoming and outgoing line sleeve (7) is provided with the voltage equalizing cap (9) on one end, one end of the voltage sensor (3) is connected with the current transformer (5) through the PT copper bus (81).

2. An overvoltage protection metering cabinet according to claim 1, characterized in that: The cabinet (1) is provided with the side plate (6) on both inner side walls, the number of the incoming and outgoing line sleeve (7) is six, and every three incoming and outgoing line sleeves (7) are fixed on the side plate (6) as a group.

3. An overvoltage protection metering cabinet according to claim 1, characterized in that: One end of the voltage equalizing cover (8), the fuse (4) and the PT copper bus (81) are fixed on one end of the voltage sensor (3) through the first screw (82).

4. An overvoltage protection metering cabinet according to claim 1, characterized in that: One end of the CT copper bus (91) and the voltage equalizing cap (9) are fixed on one end of the incoming and outgoing line sleeve (7) through the second screw (92).

5. An overvoltage protection metering cabinet according to claim 1, characterized in that: The number of the voltage transformer (2) is three, and the voltage transformers are arranged in sequence from left to right.

6. An overvoltage protection metering cabinet according to claim 1, characterized in that: The number of the voltage sensor (3) is three, and the voltage sensors are arranged in sequence from left to right.

7. An overvoltage protection metering cabinet according to claim 1, characterized in that: The number of the current transformer (5) is three, and the current transformers are arranged in sequence from front to back.

Images