CN205123102U - A miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate - Google Patents

Abstract

The utility model provides a be furnished with full insulation voltage transformer's miniaturized looped netowrk cabinet on roof, including air insulation looped netowrk cabinet, air insulation looped netowrk cabinet includes the incoming line cabinet, become the first face outgoing line cabinet that provides the incoming line power and become the second face outgoing line cabinet of power transmission for this case, the top of incoming line cabinet and first face outgoing line cabinet is provided with voltage transformer, be provided with the mutual-inductor support between voltage transformer and the incoming line cabinet, be provided with three round hole on the roof of second face outgoing line cabinet, every round hole is connected with the wall bushing respectively, wall bushing one end stretches into the inside copper bar and the switch suitable for reading of roof of second face outgoing line cabinet and is connected, the other end passes through cable accessories and cable junction, the other end of cable and voltage transformer's cable joint are connected. The utility model discloses the mounted position and the connected mode that have changed high-voltage potential transformer on air-insulated high-voltage ring main unit have greatly reduced the overall dimension that the case becomes, are convenient for install and the cost is reduced.

Description

A miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate

technical field

The utility model relates to the technical field of ring network cabinets, in particular to a miniaturized ring network cabinet equipped with fully insulated voltage transformers on the top plate.

Background technique

With the economic development and population growth, the city's electricity load is increasing day by day, and the risk of electricity failure is greatly increased. In order to improve the quality of the power grid and reduce the maintenance time, the intelligentization of the power grid has become the current and future development direction. With the intelligentization of the power grid, once the line fails, the controller can quickly isolate the fault within 5 minutes with a click of the mouse to avoid causing a power outage across the line. Now more and more urban network constructions have included the intelligent transformation of the power grid on the agenda, changing the original high and low voltage equipment from manual operation to electric operation and controlled by the background to realize the intelligent and digitalization of the power grid.

In order to realize the intelligentization of the power grid, the box-type substation needs to have the "four remote" functions, namely "remote control", "telemetry", "remote adjustment", and "remote signaling". Therefore, we need to design the high-voltage ring network cabinet in the box to be operated electrically. The commonly used electric operating voltages of high-voltage ring network cabinets are AC220V, DC220V, AC24V, DC24V, etc., while the transmission voltage on the high-voltage side of the box-type transformer is 10kV, which is much higher than the operating voltage of the ring network cabinet. It needs to be controlled by a voltage transformer. convert. The high-voltage ring network cabinets commonly used in box-type transformers are mainly divided into air insulation and SF6 insulation according to the insulation method, and there is also a solid insulation.

Potential transformers are mainly used to transform voltage to supply power to measuring instruments, relay protection devices, and control units. Its connection with high-voltage equipment is mainly realized through cables or copper bars.

The main functional units of high-voltage ring network cabinets include incoming line cabinets, outgoing line cabinets, metering cabinets, power supply cabinets, etc. The incoming line cabinet is mainly used to break the incoming power supply, the outgoing line cabinet is used to distribute and transmit electric energy, the metering cabinet is used to measure the load power consumption, and the power supply cabinet is mainly used to provide power for the electric operation of the incoming and outgoing line cabinets, and to measure voltage .

There are two types of high-voltage ring network cabinets commonly used in box-type substations in the prior art, one is shown in Figure 1, and the other is a high-voltage ring network cabinet in which the high-voltage part of the box-type transformer is insulated by air, including a high-voltage incoming line cabinet 17, two high-voltage Outlet cabinet 18, power supply cabinet 19, transformer 15 and low-voltage cabinet 16, in order to ensure electrical safety, it is necessary to set a separate closed interval for the voltage transformer, and connect its primary side with other high-voltage equipment through copper bars. Disadvantages of this technology: In order to meet electrical safety, the size of the cabinet body in the width direction should not be too small while maintaining the same appearance as other equipment. The general size is not less than 500mm, which affects the overall size of the box transformer.

Another kind of high-voltage ring network cabinet with SF6 insulation in the high-voltage part of the box transformer is to connect the primary side of the voltage transformer with other high-voltage equipment through cables and accessories. Since the live parts are not exposed, the voltage transformer does not need to be a separate compartment. , directly mounted on the high-voltage ring network cabinet. This scheme can reduce the volume of the box change, but the price is higher.

The problem to be solved urgently is to install a power supply device on the high-voltage ring network cabinet, that is, a voltage transformer, to provide operating power for high-voltage intelligent operation, and to reduce the overall size of the high-voltage ring network cabinet as much as possible to make the box transformer smaller. Save cost and floor space.

Utility model content

The problem to be solved by this utility model is to provide a miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate. Next, the power supply device used on the SF6 insulated ring network cabinet is specially applied to the air-insulated ring network cabinet, the installation method of the voltage transformer is changed, and the size of the ring network cabinet is reduced, so that the volume of the box transformer is smaller and the cost and occupation are saved. land area.

In order to solve the above technical problems, the technical solution adopted by the utility model is: a miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate, including an air-insulated ring network cabinet, and the air-insulated ring network cabinet includes an incoming line Cabinet, the first outgoing line cabinet that provides incoming power for other box-type transformers, and the second outgoing line cabinet that transmits electric energy for this box-transformer. Voltage transformers are arranged above the incoming line cabinet and the first outgoing line cabinet. A transformer support is provided between the voltage transformer and the incoming line cabinet, and three circular holes are provided on the top plate of the second outgoing line cabinet, and each of the circular holes is respectively connected with a wall bushing. One end of the wall bushing extends into the top plate of the second outlet cabinet and is connected to the upper port of the switch through a copper bar, and the other end is connected to the cable through a cable accessory, and the other end of the cable is connected to the cable of the voltage transformer. Joint connection.

Further, the two ends of the wall-through bushing are provided with circular platforms, and the circular platforms located inside the top plate of the second outlet cabinet are covered with umbrella skirts. Specifically, the wall-piercing bushing is made of epoxy casting and wrapping copper conductors, and the shed shed is made of rubber.

Further, the outgoing line of the voltage transformer is a bushing structure, and the bushing structure of the voltage transformer is connected to the cable through an elbow-shaped cable joint.

Further, the transformer support is a U-shaped structure made of cold plates, and both sides of the transformer support are respectively provided with U-shaped openings for the cables to pass through.

Specifically, the voltage transformer is fixedly connected to the top of the transformer support through bolts, and the bottom of the transformer support is fixedly connected to the top plate of the incoming cabinet.

Further, the top of the air-insulated ring network cabinet is also provided with a secondary box for installing secondary components, and the voltage transformer is located behind the secondary box.

Specifically, the height of the secondary box is 500 mm, and the longitudinal section of the secondary box is larger than that of the voltage transformer.

Further, the outside of the small-sized ring network cabinet is provided with a box-type transformer shell, and an inspection door is set on the box-type transformer shell.

Further, the first side outlet cabinet has a ring network outlet structure, the diameter of the round hole on the top plate of the second side outlet cabinet is 72 mm, and the cable accessories are European-style front plugs.

The advantages and positive effects of the utility model are: the utility model changes the installation position and connection mode of the high-voltage voltage transformer on the air-insulated high-voltage ring network cabinet, and uses the U-shaped transformer bracket to fix the voltage transformer on the ring network cabinet At the same time, it facilitates the connection of cables, greatly reduces the size of the box-type transformer, reduces the volume of the box-type transformer, facilitates installation and reduces costs, and has a more competitive advantage in the smart grid market.

Description of drawings

Fig. 1 is a schematic diagram of the arrangement of box-type transformers in the prior art;

Fig. 2 is the front view structure schematic diagram of the utility model;

Fig. 3 is a side view structural representation of the utility model;

Fig. 4 is the top view structural representation of the utility model;

Fig. 5 is a schematic diagram of the front view of the appearance of the utility model;

Fig. 6 is a schematic diagram of the appearance side view of the utility model;

Fig. 7 is a schematic diagram of the arrangement of the box-type transformer of the present invention.

In the picture:

1. Inlet cabinet 2. Outlet cabinet on the second side 3. Voltage transformer 4. Transformer bracket

5. Wall bushing 6. Umbrella shed 7. Copper row 8. Switch

9. European-style front plug 10, cable 11, cable connector 12, secondary box

13. Outlet cabinet on the first side 14. Inspection door 15. Transformer 16. Low-voltage cabinet

17. High voltage incoming line cabinet 18. High voltage outgoing line cabinet 19. Power supply cabinet

detailed description

The specific embodiment of the utility model is described below in conjunction with accompanying drawing:

As shown in Figures 2 to 4, the utility model provides a miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate, including an air-insulated ring network cabinet, and the air-insulated ring network cabinet includes an incoming line cabinet 1, for The first side outgoing line cabinet 13 that provides incoming power for other box-type transformers and the second side outgoing line cabinet 2 that transmits electric energy for this box-type transformer. A voltage transformer 3 is arranged above the incoming line cabinet 1 and the first side outgoing line cabinet 13, and the voltage The transformer 3 does not have an independent interval, and the power is taken from the main bus side of the ring network cabinet. A transformer bracket 4 is set between the voltage transformer 3 and the incoming line cabinet 1 for easy installation. The top plate of the second outgoing line cabinet 2 is set There are three round holes, each of which is connected with a wall bushing 5, one end of the wall bushing 5 extends into the top plate of the second outlet cabinet 2 and is connected to the upper port of the switch 8 through the copper bar 7, and the other end is connected through the The cable accessories are connected to the cable 10 , and the other end of the cable 10 is connected to the cable joint 11 of the voltage transformer 3 .

The first side outlet cabinet 13 is a ring network outlet structure, and the diameter of the round hole on the top plate of the second side outlet cabinet 2 is 72 millimeters, and the cable accessories are the front plug 9 of the European style.

Both ends of the wall bushing 5 are provided with a round platform, and the round platform located inside the top plate of the second outlet cabinet 2 is covered with an umbrella skirt 6; the creepage distance of the wall bushing 5 can be increased.

The wall bushing 5 is made of epoxy casting and wrapping copper conductors. Its main function is to insulate and isolate and connect the copper bar 7 on the switch 8 with the external cable 10. The shed shed 6 is made of rubber.

The voltage transformer 3 is JSZV12A-10R, and the outgoing line is bushing type. The bushing structure of the voltage transformer 3 is connected to the cable 10 through an elbow-shaped cable joint 11 .

The transformer support 4 is a U-shaped structure made of a 2.5 mm thick cold plate, and both sides of the transformer support 4 are respectively provided with U-shaped openings for cables 10 to pass through.

The voltage transformer 3 is fixedly connected to the top of the transformer support 4 through bolts, and the bottom of the transformer support 4 is fixedly connected to the top plate of the incoming line cabinet 1 .

As shown in Figure 5 and Figure 6, in order to electrically operate the high-voltage incoming line cabinet 17 and the high-voltage outgoing line cabinet 18 in the high-voltage cabinet, the top needs to be equipped with a secondary box 12 to install secondary components, and the voltage transformer 3 is located in the secondary box 12 the rear.

In order to improve the safety performance of the entire high-voltage part, the voltage transformer 3 is specially installed on the rear side of the secondary box 12, and the conventional 250mm high secondary box 12 is raised to 500mm. The longitudinal section of the secondary box 12 is larger than the voltage The vertical section of transformer 3 makes voltage transformer 3 hide in the rear portion of secondary box 12 completely.

As shown in FIG. 7 , the outer side of the small-sized ring network cabinet is provided with a box-transformer casing, and an inspection door 14 is arranged on the box-transformer casing, which is convenient for inspection and replacement of the voltage transformer 3 .

The arrangement of the box transformer of the present utility model is shown in Figure 7, and a high-voltage cabinet, a transformer 15, and a low-voltage cabinet 16 are arranged in sequence, and a high-voltage incoming cabinet 17 and two high-voltage outgoing cabinets 18 are arranged in the high-voltage cabinet, and the inspection door 14 is located at On the side of the high-voltage cabinet of the box transformer shell.

This utility model is only for a specific scheme of TPS1A type high-voltage ring network cabinet. If it is other types of air-insulated high-voltage switchgear, or the power-taking position of the voltage transformer is the incoming line side of the high-voltage equipment, the above connection method can also be used. The overall size of the box transformer is greatly reduced.

The utility model changes the installation position and connection mode of the high-voltage voltage transformer 3 on the air-insulated high-voltage ring network cabinet, and uses the U-shaped transformer bracket 4 to fix the voltage transformer 3 on the top of the ring network cabinet, and at the same time facilitates the installation of the cable 10. The connection greatly reduces the overall size of the box-type transformer, reduces the volume of the box-type transformer, facilitates installation and reduces costs, and has a more competitive advantage in the smart grid market.

The embodiments of the present utility model have been described in detail above, but the content described is only a preferred embodiment of the present utility model, and cannot be considered as limiting the implementation scope of the present utility model. All equal changes and improvements made according to the scope of the present utility model should still belong to the scope covered by this patent.

Claims (10)

1. A miniaturized ring main unit equipped with fully insulated voltage transformers on the top plate, including an air-insulated ring main unit, characterized in that: the air-insulated ring main unit includes an incoming line cabinet (1), which is a substation for other box transformers The first side outgoing line cabinet (13) that provides the incoming power supply and the second side outgoing line cabinet (2) that transmits electric energy for the box-type transformer. There is a voltage transformer (3), a transformer support (4) is provided between the voltage transformer (3) and the incoming cabinet (1), and a transformer support (4) is provided on the top plate of the second outgoing cabinet (2). There are three round holes, each of which is connected with a wall-through bushing (5), and one end of the wall-through bushing (5) extends into the inside of the top plate of the second outlet cabinet (2) through copper The row (7) is connected to the upper port of the switch (8), and the other end is connected to the cable (10) through a cable accessory, and the other end of the cable (10) is connected to the cable connector (11) of the voltage transformer (3) . 2. The miniaturized ring network cabinet equipped with fully insulated voltage transformers on the top plate according to claim 1, characterized in that: the two ends of the wall bushing (5) are provided with round tables, located at the The round table inside the top plate of the second side outlet cabinet (2) is covered with an umbrella skirt cover (6). 3. The miniaturized ring main unit equipped with fully insulated voltage transformers on the top plate according to claim 2, characterized in that: the wall-through bushing (5) is made of epoxy casting wrapped copper conductor, The material of the umbrella skirt (6) is rubber. 4. The miniaturized ring main unit equipped with a fully insulated voltage transformer on the roof according to claim 1, characterized in that: the outgoing line of the voltage transformer (3) is a bushing structure, and the voltage The bushing structure of the transformer (3) is connected to the cable (10) through an elbow-shaped cable joint (11). 5. The miniaturized ring main unit equipped with a fully insulated voltage transformer on the roof according to claim 1, characterized in that: the transformer support (4) is a U-shaped structure made of a cold plate, so Both sides of the transformer support (4) are respectively provided with U-shaped openings for the cables (10) to pass through. 6. The miniaturized ring main unit equipped with a fully insulated voltage transformer on the roof according to claim 5, characterized in that: the voltage transformer (3) is connected to the transformer bracket (4) by bolts The top of the transformer support (4) is fixedly connected to the top plate of the incoming cabinet (1). 7. A miniaturized ring network cabinet equipped with a fully insulated voltage transformer on the top plate according to claim 1, characterized in that: the top of the air-insulated ring network cabinet is also provided with a secondary box (12), the voltage transformer (3) is located behind the secondary box (12). 8. The miniaturized ring main unit equipped with fully insulated voltage transformers on the roof according to claim 7, characterized in that: the height of the secondary box (12) is 500 mm, and the secondary box (12) has a longitudinal section larger than that of the voltage transformer (3). 9. A miniaturized ring network cabinet equipped with fully insulated voltage transformers on the top plate according to claim 1, characterized in that: the outer side of the small ring network cabinet is provided with a box-type shell, and the box-type shell An inspection door (14) is arranged on it. 10. A miniaturized ring main unit equipped with fully insulated voltage transformers on the top plate according to claim 1, characterized in that: the first surface outlet cabinet (13) is a ring network outlet structure, and the second The diameter of the round hole on the top plate of the outlet cabinet (2) on both sides is 72 millimeters, and the cable accessory is a European-style front plug (9).