CN222735661U - A 40.5 kV switchgear without insulating partition - Google Patents

Abstract

The utility model relates to 40.5 kilovolt switch equipment without insulating partition plates, wherein a bus chamber and a cable chamber are arranged at the rear side of a handcart chamber, a circuit breaker is arranged in the handcart chamber, a contact box group comprises a middle contact box and edge contact boxes symmetrically arranged at two sides of the middle contact box, vertical connecting sleeves are arranged on the middle contact box, inclined connecting sleeves are arranged on the edge contact boxes, the inclined direction of each inclined connecting sleeve faces the edge of a cabinet body close to each edge contact box, and the two side edge contact boxes are inclined outwards.

Description

40.5 KV switchgear without insulating partition

Technical Field

The application relates to the field of switch cabinets, in particular to 40.5 kilovolt switch equipment without an insulating partition plate.

Background

The switch cabinet is a common complete switch device, and the domestic indoor movable medium-voltage complete switch device is a product design concept introduced into foreign 90 s at present, so that the structural design tends to be conservative and the volume is larger.

According to EC62271-200, 1 kV-52 kV alternating-current metal-enclosed switch and control device;

Or according to GB/T3906 & lt 3.6-40.5 kV alternating current metal closed switch equipment and control equipment & gt;

the electrical safety distance of the 40.5kV metal-enclosed switchgear is as follows:

the clearance distance between the conductors and the ground is 300mm, and the clearance distance between the conductors in different phases is 300mm;

According to the standard, the width of the conventional common 40.5kV air switch cabinet is 1818mm, the switch equipment is generally in complete set combination, and the whole width of 10-20 equipment in complete set combination is changed under the trend of tension in the existing urban land and compact modularization of the electric field scene.

The existing compact 40.5kV switch cabinet switch equipment has the width of 1400mm, and the insulation strength standard requirements are met by adding large interphase insulation baffles (a bus room and a cable room) among all electrified bodies so as to reduce the interphase distance, so that the purpose of compacting the width of the switch cabinet is achieved. Under the reality condition that the distribution room environment of China is uneven, in the long-term operation process of the insulating partition board, under the action of a strong electric field, dust, water vapor and the like, the risk of reducing the insulating strength and even causing failure breakdown exists.

Thus, there is a need for a more compact 40.5 kv switchgear without insulating spacers that meets the standard for overall structural design and dielectric strength standards.

Disclosure of utility model

Based on this, it is necessary to propose an air-insulated 40.5 kv switchgear without insulating spacers for the conventional structure and size.

The 40.5 kilovolt switching equipment without the insulating partition plate comprises a cabinet body, wherein the cabinet body is provided with a bus chamber, a handcart chamber and a cable chamber, the bus chamber and the cable chamber are positioned at the rear side of the handcart chamber, a circuit breaker is arranged in the handcart chamber, the input end of the circuit breaker is positioned in the bus chamber, the output end of the circuit breaker is positioned in the cable chamber, a bus bar group is arranged in the bus chamber, and the bus bar group is connected with the circuit breaker through an upper branch bus group;

The input end and the output end of the circuit breaker are both provided with contact box groups, each contact box group comprises a middle contact box and edge contact boxes symmetrically arranged on two sides of the middle contact box, each middle contact box is provided with a vertical connecting sleeve, each edge contact box is provided with an inclined connecting sleeve, and the inclined direction of each inclined connecting sleeve faces the edge of the cabinet body, which is close to each edge contact box.

The bus chamber is provided with a left baffle, a lower baffle, a right baffle and an upper baffle, wherein the lower baffle is positioned between the bus chamber and the cable chamber, and two contact box groups are symmetrically arranged on the upper side and the lower side of the lower baffle.

Preferably, the busbar group includes a first busbar, a second busbar, and a third busbar arranged in an L-shape.

Preferably, in each edge contact box, the inclined connecting sleeve comprises an inclined bottom end, an inclined pipe body and a wire inlet end, and the inclined bottom end is communicated with the inside of the edge contact box.

Preferably, the inclined connecting bus is arranged in each inclined pipe body, the vertical connecting bus is arranged in the vertical connecting sleeve, the upper branch bus group comprises three upper branch buses which are mutually arranged at intervals, the lower end of each inclined connecting bus is connected with the circuit breaker, and the upper end of each inclined connecting bus is connected with one of the upper branch buses.

Preferably, the distance between two adjacent upper branch buses is 300mm or more.

Preferably, the inclination angle a of the inclined pipe body is 75-8 degrees.

Preferably, the inclination angle of the inclined connecting bus bar is the same as the inclination angle of the inclined pipe body.

Preferably, the wire inlet end is further provided with an insulating protection plate.

Preferably, a lower branch bus group, a current transformer and an output cable are arranged in the cable chamber. The application has the technical advantages that:

1. Firstly, the edge contact boxes at two sides are arranged in an outward shape, and the inclined connecting buses in the edge contact boxes are also arranged in an inclined way, so that the safe isolation distance between the middle contact box and the upper ends of the two edge contact boxes is kept at the minimum of 300mm, namely the distance between the connected upper buses is kept at 300mm or more;

2. The bottoms of the contact box groups are tightly connected together, and the upper parts of the edge contact boxes at the two sides gradually extend outwards, so that the volume of the cabinet body can be reduced under the condition of conforming to the standard of safety isolation distance, and the compact switch cabinet is conformed;

3. The insulating protection board is further arranged on the incoming line end, so that the interphase insulation protection effect can be improved, and the method is suitable for being used under the conditions of high humidity or severe field environment.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application, are incorporated in and constitute a part of this specification. The drawings and their description are illustrative of the application and are not to be construed as unduly limiting the application.

Fig. 1 is a general structural view of a 40.5 kv switchgear without an insulating spacer according to the present application.

Fig. 2 is a schematic diagram of a back structure of a 40.5 kv switchgear according to an embodiment of the present application.

Fig. 3 is a schematic diagram of an internal structure of a 40.5 kv switchgear according to an embodiment of the present application.

Fig. 4 is a schematic diagram illustrating a side connection relationship of a contact box set according to an embodiment of the present application.

Fig. 5 is a schematic diagram of actual layout pitch of a contact box set according to another embodiment of the present application.

The reference numerals comprise a cabinet body 1, a bus bar chamber 11, a left partition 111, a lower partition 112, a right partition 113, an upper partition 114, a handcart chamber 12, a cable chamber 13, a circuit breaker 14, an input end 141, an output end 142, a bus bar group 2, a first bus bar 21, a second bus bar 22, a third bus bar 23, a contact box group 3, a middle contact box 31, a vertical connecting sleeve 311, an edge contact box 32, an inclined connecting sleeve 321, an inclined bottom end 3211, an inclined pipe body 3212, a wire inlet end 3213, an insulating protection plate 3214, an upper bus bar group 4, an inclined connecting bus bar 401, a vertical connecting bus bar 402, an upper bus bar 403, a lower bus bar group 5, a current transformer 6 and an output cable 7.

Detailed Description

The present application will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present application more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the application.

It should be noted that all directional indicators (such as up, down, left, right, front, and rear are used in the embodiments of the present utility model) are merely for explaining the relative positional relationship, movement conditions, and the like between the components in a certain specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicators are changed accordingly.

Furthermore, descriptions such as those referred to as "first," "second," and the like, are provided for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implying an order of magnitude of the indicated technical features in the present disclosure. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present utility model, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present utility model, unless explicitly specified and limited otherwise, the terms "connected," "fixed," and the like are to be construed broadly, and for example, "fixed" may be fixedly connected, detachably connected, or integrally formed, mechanically connected, electrically connected, directly connected, indirectly connected via an intervening medium, or in communication between two elements or in an interaction relationship between two elements, unless otherwise explicitly specified. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

The existing compact 40.5KV switch cabinet takes air insulation as an example, if the existing 1400mm is calculated according to the lowest safety interval distance, insulating partition boards are added between each contact box and each upper bus to improve the insulating strength, but under the actual condition that the distribution room environment of China is uneven, the insulating partition boards have the risk of reducing the insulating strength and even causing failure breakdown under the action of strong electric fields, dust, water vapor and the like in the long-term operation process. The switch cabinets are generally arranged in a plurality, when each 40.5KV switch cabinet can save 400mm, the plurality of switch cabinets are used side by side, so that a large amount of space can be saved, and higher economic expenditure can be saved for a user.

As shown in fig. 1 to 5, the present application provides a 40.5 kv switchgear without an insulating barrier.

In one embodiment

As shown in fig. 1, the 40.5 kv switchgear without insulating partition plate of the present application comprises a cabinet body 1, wherein a bus bar 11, a handcart room 12 and a cable room 13 are arranged in the cabinet body 1, the bus bar 11 and the cable room 13 are positioned at the rear side of the handcart room 12, a circuit breaker 14 is arranged in the handcart room 12, an input end 141 of the circuit breaker 14 is positioned in the bus bar 11, an output end 142 of the circuit breaker 14 is positioned in the cable room 13, a bus bar group 2 is arranged in the bus bar room 11, and the bus bar group 2 is connected with the circuit breaker 14 through an upper branch bus bar group 4.

As shown in fig. 2, the bus bar chamber 11 is provided with a left partition 111, a lower partition 112, a right partition 113 and an upper partition 114, wherein the lower partition 112 is positioned between the bus bar chamber 11 and the cable chamber 13, and the two contact box groups 3 are symmetrically arranged on the upper side and the lower side of the lower partition 112.

As shown in fig. 3, the busbar set 2 includes a first busbar 21, a second busbar 22 and a third busbar 23 which are arranged in an L-shape, in each edge contact box 32, the input end 141 and the output end 142 of the circuit breaker 14 are both provided with a contact box set 3, the contact box set 3 includes a middle contact box 31 and edge contact boxes 32 symmetrically arranged at two sides of the middle contact box 31, the middle contact box 31 is provided with a vertical connecting sleeve 311, each edge contact box 32 is provided with an inclined connecting sleeve 321, and the inclined direction of each inclined connecting sleeve 321 faces the edge of the cabinet body 1 close to each edge contact box 32.

As shown in fig. 4-5, the inclined connecting sleeve 321 comprises an inclined bottom end 3211, an inclined pipe body 3212 and a wire inlet end 3213, and the inclined bottom end 3211 is communicated with the inside of the edge contact box 32.

Example 1 as shown in FIGS. 3-4

An inclined connecting bus 401 is arranged in each inclined pipe body 3212, a vertical connecting bus 402 is arranged in the vertical connecting sleeve 311, the upper branch bus group 4 comprises three upper branch buses 403 which are mutually arranged at intervals, and a lower branch bus group 5, a current transformer 6 and an output cable 7 are arranged in the cable chamber 13.

Each upper branch busbar 403 is sequentially connected with the first busbar 21, the second busbar 22 and the third busbar 23 respectively, so that electricity of the busbar set 2 is conducted to the input end 141 of the breaker 14, the middle is isolated and protected by the contact box set 3, and then is conducted to the lower branch busbar set 5 from the output end 142 of the breaker 14, and then is conveyed to the transformer from the output cable 7.

The lower end of the inclined connecting bus 401 is connected with the breaker 14, the upper end of the inclined connecting bus 401 is connected with one of the upper branch buses 403, and the distance between two adjacent upper branch buses 403 is 300mm or more.

In order to ensure a safe air insulation distance of 300mm, the inclined angle a of the inclined tube body 3212 is 75-80 degrees, and the angle can be slightly adjusted according to the length of the inclined tube body 3212 of the edge contact box 32.

As shown in fig. 5, in the present embodiment, the inclination angle a of the inclined tube body 3212 is 78 degrees, that is, the angle between the inclined tube body 3212 and the horizontal direction, and the inclined connecting bus bar 401 is set in a synchronous inclined manner in the inclined tube body 3212, and the inclination angle of the inclined connecting bus bar 401 is the same as the inclination angle of the inclined tube body 3212.

In order to further improve the insulation effect between the upper branch buses 403, as shown in fig. 3, insulation protection plates 3214 may be provided on both sides of the incoming line end 3213, and the insulation protection plates 3214 are two, and are respectively fixed at the connection position of the upper branch buses 403 and the contact box.

As shown in FIG. 3, example 2 the existing 40.5KV switchgear is 1818mm

The 40.5KV switch cabinet is made into a 1400mm compact switch cabinet, an insulating partition plate is not needed, an upper branch bus connected with the upper ends of the edge contact box 32 and the middle contact box 31 is an exposed part, and a safe distance is needed to be kept for 300mm or more.

In order to maintain a safe air insulation distance, the inclination angles a of the two inclined pipe bodies 3212 at two sides are 78 degrees, and the two inclined pipe bodies are symmetrically arranged with the vertical connecting sleeve 311 as a center.

The space L10 between the wire inlet end 3213 at the left side and the edge of the cabinet body 1 is 310mm or more and 300mm or less;

The spacing L30 between the incoming line end 3213 on the right side and the edge of the cabinet body 1 is 310mm or more and 300mm or less;

The distance L12 between the wire inlet end 3213 on the left side and the vertical connecting sleeve 311 is 300mm or more and 300mm or more;

The distance L23 between the wire inlet end 3213 on the right side and the vertical connecting sleeve 311 is 300mm or more than 300mm;

meanwhile, the center distance of the three upper branch buses 403 is 360mm or more and is 350mm or more;

The safety distance is equal to or greater than 300mm, the spacing between L10 and L30 is far greater than 300mm, and the space is still sufficient, so that the included angle a can be finely adjusted, and the copper bar width is 60mm, 3=180 mm.

The width of the whole cabinet is 310mm+300 mm+310mm+180 mm=1400 mm, the safety index requirements of each phase of the 1400mm type 40.5kV/1250A/31.5KA metal closed switch cabinet are completely met, and the design of a partition plate is not required to be added.

In summary, the design of the utility model ensures that the edge contact boxes at two sides are inclined outwards, thus ensuring that the minimum safe isolation distance of 300mm is kept between the middle contact box and the upper ends of the two edge contact boxes, namely, the distance between the connected upper buses is kept at 300mm or more, converting the original horizontal straight line layout into the inclined improvement on a plane, and the space is reasonable layout, thereby further reducing the volume of the whole switch cabinet, compacting and improving the utilization rate of factory land on the premise of ensuring the safety.

The technical features of the above embodiments may be combined arbitrarily, and the steps of the method are not limited to the execution sequence, so that all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description of the present specification.

The foregoing examples illustrate only a few embodiments of the application and are described in detail herein without thereby limiting the scope of the application. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the application, which are all within the scope of the application. Accordingly, the scope of the application should be assessed as that of the appended claims.

Claims (10)

1. The 40.5 kilovolt switching equipment without the insulating partition plate comprises a cabinet body (1), wherein the cabinet body (1) is provided with a bus chamber (11), a handcart chamber (12) and a cable chamber (13), and is characterized in that the bus chamber (11) and the cable chamber (13) are positioned at the rear side of the handcart chamber (12), a circuit breaker (14) is arranged in the handcart chamber (12), an input end (141) of the circuit breaker (14) is positioned in the bus chamber (11), an output end (142) of the circuit breaker (14) is positioned in the cable chamber (13), a bus bar group (2) is arranged in the bus chamber (11), and the bus bar group (2) is connected with the circuit breaker (14) through an upper branch bus group (4);

The input end (141) and the output end (142) of the circuit breaker (14) are both provided with a contact box group (3), the contact box group (3) comprises a middle contact box (31) and edge contact boxes (32) symmetrically arranged on two sides of the middle contact box (31), a vertical connecting sleeve (311) is arranged on the middle contact box (31), an inclined connecting sleeve (321) is arranged on each edge contact box (32), and the inclined direction of each inclined connecting sleeve (321) faces the edge of a cabinet body (1) close to each edge contact box (32).

2. The 40.5 kv switchgear without insulating partition according to claim 1, wherein the bus compartment (11) is provided with a left partition (111), a lower partition (112), a right partition (113) and an upper partition (114), the lower partition (112) is located between the bus compartment (11) and the cable compartment (13), and the two contact box groups (3) are symmetrically disposed on the upper and lower sides of the lower partition (112).

3. The 40.5 kv switchgear without insulating barrier according to claim 2, characterized in that the busbar group (2) comprises a first busbar (21), a second busbar (22) and a third busbar (23) arranged in an L-shape.

4. A 40.5 kv switchgear without insulating spacers according to claim 3, characterized in that, in each edge contact box (32), the oblique connecting sleeve (321) comprises an oblique bottom end (3211), an oblique tubular body (3212) and a wire inlet end (3213), the oblique bottom end (3211) being in communication with the interior of the edge contact box (32).

5. The 40.5 kv switchgear without insulating partition according to claim 4, wherein an inclined connecting bus bar (401) is disposed in each inclined tube body (3212), a vertical connecting bus bar (402) is disposed in the vertical connecting sleeve (311), the upper bus bar group (4) includes three upper bus bars (403) disposed at intervals from each other, a lower end of the inclined connecting bus bar (401) is connected to a circuit breaker (14), and an upper end of the inclined connecting bus bar (401) is connected to one of the upper bus bars (403).

6. The 40.5 kv switchgear without insulating barrier according to claim 5, wherein a distance between two adjacent upper branch buses (403) is 300mm and more.

7. The 40.5 kv switchgear without insulating spacers of claim 6, wherein the inclined shaft (3212) has an inclination angle a of 75-80 degrees.

8. The 40.5 kv switchgear without insulating barrier according to claim 7, wherein the inclined angle of the inclined connecting bus bar (401) is the same as the inclined angle of the inclined pipe body (3212).

9. The 40.5 kv switchgear without insulating spacers of claim 4, wherein the incoming end (3213) is further provided with an insulating protection plate (3214).

10. The 40.5 kv switchgear without insulating partition according to claim 1, characterized in that the cable compartment (13) is provided with a lower branch busbar set (5), a current transformer (6) and an output cable (7).