CN210926766U - Transformer comprehensive distribution box - Google Patents

Abstract

The utility model provides a transformer comprehensive distribution box, which comprises a box body, wherein the box body comprises a compensation chamber, a metering chamber, a wire inlet chamber and a wire outlet chamber, the compensation chamber comprises a reactive compensation controller, a triangular wiring capacitor bank, a star-type wiring capacitor bank, a bidirectional thyristor and an air switch, the side faces of the wire inlet chamber and the wire outlet chamber are respectively provided with a wire inlet hole and a wire outlet hole, the compensation chamber and the wire inlet chamber are respectively positioned on the left side and the right side of the metering chamber, and the upper part of the metering chamber is provided with a meter; the capacitor bank of the triangular wiring or the capacitor bank of the star-type wiring is connected with the bidirectional thyristor and the air switch in series, the reactive compensation controller and the air switch are positioned at the upper end of the front part and the upper end of the rear part of the compensation chamber, the capacitor bank of the triangular wiring and the capacitor bank of the star-type wiring are positioned at the lower end of the front part of the compensation chamber, and the bidirectional thyristor is positioned at the lower end of the rear part of the compensation chamber. The utility model discloses a block terminal is synthesized to transformer, compact structure, equipment layout and wiring are reasonable, and are with low costs, anti forceful electric power interference, easy maintenance.

Description

A transformer integrated distribution box

technical field

The utility model relates to the technical field of distribution boxes, in particular to a transformer integrated distribution box.

Background technique

Transformer integrated distribution box is to assemble switchgear, measuring instruments, protective appliances and auxiliary equipment in closed or semi-enclosed metal cabinets or screens to form electrical energy distribution and measurement electrical equipment. The transformer integrated distribution box is generally set adjacent to the transformer, and has been widely used in the vast rural power distribution system.

There are many inductive loads in the low-voltage distribution network, which have a great impact on the power factor and power quality. Therefore, it is necessary to perform reactive power compensation on the spot, improve the power factor, and reduce the line loss, thereby improving the load capacity and power supply quality of the power grid. . At present, the common compensation method is generally adopted in the integrated distribution box of the transformer, that is, the delta-connected capacitor is used as the compensation room. However, this co-compensation method can only compensate the reactive power of the balanced load. For the unbalanced load, such as the reactive power generated by the electrical equipment using single-phase electricity, the three phases cannot be well compensated. There may be some One phase is overcompensated and the other is undercompensated. Therefore, it is necessary to set up a sub-compensation method, that is, a star-connected capacitor is used as a compensation room, so that all three phases can be well compensated.

Although, there have been studies on reactive power compensation using the combination of sub-compensation and co-compensation. For example, the patent application number is

201020160708.0, the patent name is the patent for the integrated distribution box of the column-mounted transformer with reactive power compensation device, the box is divided into installation metering unit, compensation room and switch isolation unit, and the compensation room connected with delta and star is placed in the same chamber to reduce the volume. However, this patent mainly considers reducing the volume of the transformer integrated distribution box in order to reduce the cost and save the land area, and does not consider the specific wiring direction of the transformer integrated distribution box. The patent application number is

201721541954.9, the patent name is a patent for a transformer integrated distribution box. The distribution box is divided into a reactive power compensation room, a main switch room, and an outlet switch room by a cross dividing plate, and a busbar room is located at the rear of the main switch room. The specific wiring is further studied. However, in this patent, the measuring chamber is not provided, nor is there any description of the measuring chamber in the text. In fact, the metering function is a very important function of the transformer integrated distribution box.

In the integrated distribution box of the transformer, the strong electricity is easy to cause interference to the measurement and control circuits, affecting the accuracy of the control and measurement; The reactive power compensation room often needs to be repaired and maintained. The current reactive power compensation device needs to shut down the entire compensation room equipment when a single group of capacitors fails, reducing the comprehensive distribution box of the transformer to provide users with sustainable and high-efficiency. quality of electrical energy. Therefore, when designing the integrated distribution box of the transformer, it is necessary to reasonably design each unit and wiring to isolate the strong current from the weak current, and to easily maintain the equipment in the reactive power compensation room.

Utility model content

In order to overcome the deficiencies of the existing research, the utility model provides a transformer integrated distribution box with compact structure, reasonable equipment layout and wiring, low cost, anti-strong electric interference, and convenient maintenance of reactive power compensation room equipment. In order to realize the above-mentioned functions, the above-mentioned technical problems of the present utility model are mainly solved by the following technical solutions:

The utility model provides a transformer integrated distribution box, comprising a box body, the box body includes a compensation room, a metering room and an incoming line room, the back of the incoming line room and the lower part of the back of the metering room are provided with an outgoing line room, and the compensation room includes reactive power compensation Controller, delta-connected capacitor bank, star-connected capacitor bank, triac and air switch, the side of the inlet room is provided with the inlet hole, and the side of the outlet room is provided with the outlet hole; the compensation room contains the delta-connected capacitor bank The capacitor bank connected with the star can not only compensate the three-phase balanced load, but also compensate the unbalanced load separately, which improves the power factor and reduces the line loss, thereby improving the load capacity of the transformer integrated distribution box. and power quality.

The compensation room is located on the left side of the measuring room, and the incoming line room is located on the right side of the measuring room. The upper part of the measuring room is provided with a meter, which is isolated from the lower outlet room through a partition; the compensation room, the metering room, the line entry room, The outlet rooms are separated from each other, and the measurement room is isolated from the outlet room at the lower part of the measurement room. The location and wiring of the equipment are reasonable, so that the meter and the reactive power compensation controller in the measurement room are not disturbed by strong electricity, and the accuracy of measurement and control is improved. guarantees are provided;

The delta-connected capacitor bank or star-connected capacitor bank is connected in series with triac and air switch; each group of delta-connected capacitor bank or star-connected capacitor bank is connected in series with an air switch, and the single-group delta-connected capacitor bank is connected in series with an air switch. When the capacitor bank or the star-connected capacitor bank fails, just open the corresponding air switch, and other delta-connected capacitor banks or star-connected capacitor banks can continue to operate, without affecting the transformer integrated distribution box to provide users with available power. Continuous, high-quality power;

The reactive power compensation controller is located at the upper end of the front of the compensation room, the air switch is located at the upper end of the rear of the compensation room, the capacitor bank of delta connection and the capacitor bank of star connection are located at the lower end of the front of the compensation room, and the triac is located at the back of the compensation room lower end.

Further, a grounding bolt permanently connected to the grounding device is fixed on the rear bottom shell of the box body. The fixed grounding bolts provide convenience for the grounding of peripherals during the maintenance process, and also facilitate the discharge of the capacitors to prevent the residual charge of the capacitors from threatening the safety of maintenance personnel. The grounding bolt is arranged on the casing of the box to prevent the capacitor from closing the back door when the grounding wire is attached to the capacitor, and the grounding wire is mistakenly put into the capacitor and causes a short circuit.

Further, stainless steel waterproof elbows are arranged at the wire inlet hole and the wire outlet hole. The stainless steel waterproof elbow can protect the incoming cable and outgoing cable. At the same time, it can also prevent water from entering the transformer integrated distribution box and ensure the safe and stable operation of the transformer integrated distribution box.

Further, the top end of the box body is provided with a top cover, and a plurality of suspension installation links are symmetrically arranged on the top cover. Symmetrically arranged suspension installation links can ensure that they will not roll over during hoisting, meet hoisting requirements, and are easy to install and disassemble.

Further, the top and bottom of the box body are provided with cooling ventilation holes, both sides of the box body are provided with defensive louver ventilation holes, and stainless steel wire mesh is added to the cooling ventilation holes and the louver ventilation holes. The cooling ventilation holes and louver ventilation holes make the transformer integrated distribution box have good heat dissipation capacity, and the addition of stainless steel wire mesh can prevent small animals from entering the transformer integrated distribution box and cause short circuit.

Further, the measuring room includes two doors, an inner door and an outer door, the inner door includes an observation window, and the outer door has no observation window, and both the inner door and the outer door adopt a hinged door shaft fixing method. The observation window set on the inner door can facilitate the staff to read the meter, and the hinged door shaft of the outer door can ensure the flexible opening and closing of the door body.

Further, the material of the door shaft is stainless steel.

Further, the observation window is made of 5mm tempered glass, and the inner side of the edge of the observation window is sealed with a dispensing sealing strip.

Further, there are no less than three groups of capacitor banks connected in a delta connection, and no less than two groups of capacitor banks connected by a star connection.

Further, the doors of the compensation room, the metering room and the wire entry room of the box body are all provided with door locks, the door locks are three-point positioning door locks, and the lock cylinder of the door lock is provided with a protective cover. The three-point positioning door lock is safe and reliable, and can prevent electricity theft.

Beneficial effects of the utility model.

1. In the transformer integrated distribution box of the present utility model, the compensation room, the measuring room, the incoming line room and the outgoing line room are all separated, and the measuring room is isolated from the outgoing line room at the lower part of the measuring room. The layout and wiring of the equipment are reasonable, so that the metering The indoor metering meter and reactive power compensation controller are not disturbed by strong electricity, which provides a guarantee for the accuracy of measurement and control.

2. In the transformer integrated distribution box of the present invention, an air switch is connected in series with each group of delta-connected capacitor banks or star-connected capacitor banks; The room contains delta-connected capacitor banks and star-connected capacitor banks, which can not only compensate three-phase balanced loads, but also sub-compensate unbalanced loads, improve power factor, reduce line loss, and improve transformer performance. The load capacity and power supply quality of the integrated distribution box.

3. In the transformer integrated distribution box of the present utility model, when a single group of delta-connected capacitor banks or star-connected capacitor banks fails, it is only necessary to open the corresponding air switch, and other delta-connected capacitor banks or star-connected capacitor banks need to be opened. The capacitor bank can continue to operate without affecting the normal power supply, so that the integrated distribution box of the transformer can continuously provide users with high-quality power.

4. The transformer integrated distribution box of the present utility model is provided with a permanent grounding point, which provides convenience for maintenance personnel to work and discharge the capacitor; cause a short circuit.

5. In the integrated distribution box of the transformer of the present invention, stainless steel waterproof elbows are used for the wire inlet and outlet, which can protect the incoming cable and the outgoing cable, and at the same time, it can also prevent water from entering the transformer integrated distribution box. , to ensure the safe and stable operation of the transformer integrated distribution box.

6. In the integrated distribution box of the transformer of the present utility model, a number of suspension and installation connecting rods are symmetrically arranged on the top cover, which can ensure that it does not roll over during hoisting, meets the hoisting requirements, and is easy to install and disassemble.

7. The transformer integrated distribution box of the present utility model has good heat dissipation capability and anti-destroying capability of small animals.

8. In the transformer integrated distribution box of the present invention, the observation window provided on the inner door can facilitate the staff to read the meter, and the hinged door shaft of the outer door can ensure the flexible opening and closing of the door body; at the same time, the door locks of the box body adopt Three-point positioning door lock, safe and reliable work, can prevent electricity theft.

Description of drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions in the prior art, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description These are just some embodiments of the present invention, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort.

Fig. 1 is the front view schematic diagram of this utility model transformer integrated distribution box;

Fig. 2 is the rear view schematic diagram of this utility model transformer integrated distribution box;

Fig. 3 is the bottom view schematic diagram of this utility model transformer integrated distribution box;

FIG. 4 is a schematic diagram of a right side view of the transformer integrated distribution box of the utility model.

In the figure: 1. Box body; 2. Compensation room; 3. Measuring room; 4. Inlet room; 5. Outlet room; 6. Reactive power compensation controller; 7. Inlet hole; 8. Outlet hole; 9 , grounding bolt; 10, waterproof elbow; 11, top cover; 12 suspension installation link; 13, cooling ventilation holes; 14, louver ventilation holes; 15, observation window.

Detailed ways

The preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, and the protection scope of the present invention can be more clearly defined.

As shown in Figures 1-4, the transformer integrated distribution box in this embodiment includes a box body 1. The box body 1 includes a compensation room 2, a metering room 3 and an incoming line room 4. The back of the incoming line room 4 and the metering room An outlet chamber 5 is arranged on the lower part of the back of the chamber 3. The compensation chamber 2 includes a reactive power compensation controller 6, a capacitor bank with delta connection, a capacitor bank with star connection, a triac and an air switch. Wire hole 7, the side of the wire outlet chamber 5 is provided with a wire outlet hole 8; the compensation chamber includes a capacitor bank with delta connection and a capacitor bank with star connection, which can not only compensate for three-phase balanced loads, but also compensate for unbalanced loads separately. , improving the power factor and reducing the line loss, thereby improving the load capacity and power supply quality of the transformer integrated distribution box.

The compensation room 2 is located on the left side of the measurement room 3, the wire inlet room 4 is located on the right side of the measurement room 3, the upper part of the measurement room 3 is provided with a meter, and the meter is isolated from the lower outlet room 5 through a partition; the compensation room 2, The metering room 3, the incoming line room 4, and the outgoing line room 5 are separated from each other, and the metering room 3 is isolated from the outgoing line room 5 at the lower part of the metering room 3. The location and wiring of the equipment are reasonable, so that the metering and reactive power compensation control of the metering room 3 The device 6 is not disturbed by strong electricity, which provides a guarantee for the accuracy of measurement and control;

The delta-connected capacitor bank or star-connected capacitor bank is connected in series with triac and air switch; each group of delta-connected capacitor bank or star-connected capacitor bank is connected in series with an air switch, and the single-group delta-connected capacitor bank is connected in series with an air switch. When the capacitor bank or the star-connected capacitor bank fails, just open the corresponding air switch, and other delta-connected capacitor banks or star-connected capacitor banks can continue to operate, without affecting the transformer integrated distribution box to provide users with available power. Continuous, high-quality power;

The reactive power compensation controller 6 is located at the upper end of the front part of the compensation chamber 2, the air switch is located at the upper end of the rear part of the compensation chamber 2, the capacitor bank of the delta connection and the capacitor bank of the star connection are located at the lower end of the front part of the compensation chamber 2, and the triac is located at the upper end of the front part of the compensation chamber 2. The lower end of the rear part of the compensation chamber 2.

A grounding bolt 9 permanently connected to the grounding device is fixed on the rear bottom shell of the box body 1 . The fixed grounding bolt 9 provides convenience for the grounding of peripherals during the maintenance process, and also facilitates the discharge of the capacitor, preventing the residual charge of the capacitor from threatening the safety of the maintenance personnel. The grounding bolt 9 is arranged on the casing of the box body 1 to prevent the back door from being closed when the grounding wire is hung on the capacitor, and the grounding wire being mistakenly put into the capacitor and causing a short circuit.

The inlet hole 7 and the outlet hole 8 are provided with stainless steel waterproof elbows 10 . The stainless steel waterproof elbow 10 can protect the incoming and outgoing cables, and at the same time, it can also prevent water from entering the integrated distribution box of the transformer and ensure the safe and stable operation of the integrated distribution box of the transformer.

The top end of the box body 1 is provided with a top cover 11 , and a plurality of suspension mounting links 12 are symmetrically arranged on the top cover 11 . Symmetrically arranged suspension installation links 12 can ensure that they do not roll over during hoisting, meet hoisting requirements, and are easy to install and disassemble.

The top and bottom of the box body 1 are provided with heat dissipation ventilation holes 13, both sides of the box body 1 are provided with defensive louver ventilation holes 14, and stainless steel wire mesh is added to the heat dissipation ventilation holes 13 and the louver ventilation holes 14. The heat dissipation ventilation holes 13 and the louver ventilation holes 14 make the transformer integrated distribution box have good heat dissipation capacity, and the addition of stainless steel wire mesh can prevent small animals from entering the transformer integrated distribution box and cause short circuit.

The measuring room 3 includes an inner door and an outer door. The inner door includes an observation window 15, and the outer door has no observation window 15. Both the inner door and the outer door are fixed by hinged door shafts. The observation window 15 set on the inner door can facilitate the staff to read the meter, and the hinged door shaft of the outer door can ensure the flexible opening and closing of the door body.

The material of the door shaft is stainless steel.

The observation window 15 is made of 5mm tempered glass, and the inner side of the edge of the observation window 15 is sealed with a dispensing sealing strip.

There should be no less than three capacitor banks for delta connection, and at least two capacitor banks for star connection.

The doors of the compensation room 2, the metering room 3 and the wire entry room 4 of the box body 1 are all provided with door locks, the door locks are three-point positioning door locks, and the lock core of the door locks is provided with a protective cover. The three-point positioning door lock is safe and reliable, and can prevent electricity theft.

In this transformer integrated distribution box, the compensation room 2, the measuring room 3, the incoming line room 4, and the outgoing line room 5 are all separated, and the measuring room 3 is isolated from the outgoing line room 5 at the lower part of the measuring room 3. The equipment location and wiring are reasonable. The metering meter of the measuring room 3 and the reactive power compensation controller 6 are not disturbed by strong electricity, which provides a guarantee for the accuracy of measurement and control.

In this integrated transformer distribution box, an air switch is connected in series with each group of delta-connected capacitor banks or star-connected capacitor banks. Therefore, in the transformer integrated distribution box of the present utility model, the compensation chamber includes delta-connected capacitors. The capacitor bank and star-connected capacitor bank can not only compensate the three-phase balanced load, but also compensate the unbalanced load separately, which improves the power factor and reduces the line loss, thereby improving the comprehensive distribution box of the transformer. load capacity and power quality.

In this kind of transformer integrated distribution box, when a single group of delta-connected capacitor banks or star-connected capacitor banks fails, just open the corresponding air switch, and other delta-connected capacitor banks or star-connected capacitor banks can continue to operate. Operation, does not affect the normal power supply, so that the integrated distribution box of the transformer can continuously provide users with high-quality power.

This transformer integrated distribution box is equipped with a permanent grounding point, which provides convenience for maintenance personnel to work and discharge capacitors; at the same time, the location of the grounding point is set reasonably, which can prevent short-circuits caused by mistakenly throwing capacitors with grounding wires.

This kind of transformer integrated distribution box, the inlet and outlet are made of stainless steel waterproof elbow 10, which can protect the incoming cable and the outgoing cable. Safe and stable operation of the integrated distribution box.

In this integrated transformer distribution box, the top cover 11 is symmetrically provided with a number of suspension installation connecting rods 12, which can ensure that it does not roll over during hoisting, meets hoisting requirements, and is easy to install and disassemble.

This kind of transformer integrated distribution box has good heat dissipation ability and anti-small animal damage ability.

In this integrated transformer distribution box, the observation window 15 set on the inner door can facilitate the staff to read the meter, and the hinged door shaft of the outer door can ensure the flexible opening and closing of the door; Positioning the door lock, the work is safe and reliable, and it can prevent electricity theft.

Although the present invention has been illustrated and described with reference to preferred embodiments, it will be understood by those of ordinary skill in the art that various changes in form and details may be made within the scope of the claims.

Claims (10)

1. A transformer integrated distribution box, comprising a box body (1), the box body (1) comprising a compensation room (2), a metering room (3) and an incoming line room (4), the incoming line room ( 4) The back and the lower part of the back of the metering chamber (3) are provided with an outlet chamber (5), and the compensation chamber (2) includes a reactive power compensation controller (6), a delta-connected capacitor bank, a star-connected capacitor bank, a bidirectional A thyristor and an air switch, a wire inlet hole (7) is arranged on the side of the wire inlet chamber (4), and a wire outlet hole (8) is arranged on the side of the wire outlet chamber (5), and is characterized in that: the compensation chamber ( 2) It is located on the left side of the metering chamber (3), the wire inlet chamber (4) is located on the right side of the metering chamber (3), and the upper part of the metering chamber (3) is provided with a meter, The board is isolated from the lower outlet chamber (5); the capacitor bank of the delta connection or the capacitor bank of the star connection is connected in series with the triac and the air switch, and the reactive power compensation controller (6) is located in the compensation chamber ( 2) The upper end of the front part, the air switch is located at the upper end of the rear part of the compensation chamber (2), the capacitor bank of the delta connection and the capacitor bank of the star connection are located at the lower end of the front part of the compensation chamber (2). It is located at the lower end of the rear of the compensation chamber (2). 2. A transformer integrated distribution box according to claim 1, characterized in that: a grounding bolt (9) permanently connected to a grounding device is fixed on the rear bottom shell of the box body (1). . 3. A transformer integrated distribution box according to claim 1, characterized in that: stainless steel waterproof elbows (10) are provided at the wire inlet holes (7) and the wire outlet holes (8). 4. A transformer integrated distribution box according to claim 1, characterized in that: a top cover (11) is provided on the top of the box body (1), and several Suspension mount link (12). 5. A transformer integrated distribution box according to claim 1, characterized in that: the top and bottom of the box body (1) are provided with heat dissipation ventilation holes (13), and the box body (1) has Defensive louver ventilation holes (14) are provided on both sides, and stainless steel wire meshes are added to the heat dissipation ventilation holes (13) and the louver ventilation holes (14). 6. A transformer integrated distribution box according to claim 1, characterized in that: the metering room (3) comprises two doors, an inner door and an outer door, the inner door includes an observation window (15), the The outer door has no observation window (15), and both the inner door and the outer door adopt a three-section hinged door shaft fixing method. 7 . The integrated transformer distribution box according to claim 6 , wherein the material of the door shaft is stainless steel. 8 . 8 . The integrated transformer distribution box according to claim 6 , wherein the observation window ( 15 ) is a 5mm tempered glass, and the inner side of the edge of the observation window ( 15 ) is sealed with a dispensing sealing strip. 9 . 9 . The integrated transformer distribution box according to claim 1 , wherein there are no less than three capacitor banks in the delta connection, and no less than two capacitor banks in the star connection. 10 . 10. A transformer integrated distribution box according to claim 1, characterized in that: the doors of the compensation room (2), the metering room (3) and the incoming line room (4) of the box (1) are all open A door lock is provided, the door lock is a three-point positioning door lock, and the lock cylinder of the door lock is provided with a protective cover.

Images