Novel low-voltage cabinet of multipath frame circuit breaker

Abstract

The utility model discloses a novel low-voltage cabinet of a multipath frame circuit breaker, which comprises a low-voltage cabinet body, a main frame circuit breaker, an inlet wire frame circuit breaker, a busbar I, a busbar II, a copper bar supporting insulator, a copper bar supporting insulating rod and a client hanging cable bolt, an upper port of the main frame circuit breaker is connected with a transformer through a copper bar, a lower port of the main frame circuit breaker is connected with an upper port of the wire inlet frame circuit breaker through a busbar I of the low-voltage cabinet, a lower port of the wire inlet frame circuit breaker is connected with a busbar II on the lower portion of the low-voltage cabinet, and a client hooking cable bolt is installed on a lower port of the busbar II. An inlet wire molded case circuit breaker is omitted, the maintenance work of equipment is simplified, and the equipment failure rate is reduced; the lower port of the low-voltage cabinet wire inlet frame circuit breaker is expanded by adopting the busbar II, the user wiring mode is flexible, the inverter with larger capacity and more paths can be accessed, and the purposes of reducing cost and increasing efficiency are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a novel low voltage cabinet of multi -circuit frame circuit breaker, be applicable to new energy photovoltaic power generation field. BACKGROUND

[0002] The development of new energy photovoltaic industry in China is changing with each passing day, along with new energy photovoltaic project is put into use more and more, under the condition of the industry trend of photovoltaic power generation capacity increasing, cost reduction and efficiency increasing is more obvious, the traditional prefabricated substation low voltage cabinet mode problem is more and more prominent, the main features of traditional photovoltaic prefabricated substation low voltage cabinet are as follows:

[0003] The form of main frame circuit breaker+multiple incoming line plastic shell circuit breaker is adopted, the number of incoming line plastic shell circuit breaker is often more, taking the 9MW photovoltaic box-type substation commonly seen in the market as an example, the traditional low voltage cabinet form needs to be configured with 30 incoming line plastic shell circuit breakers with rated current 400A, therefore, the production efficiency of box transformer manufacturer is low and the cost is high;

[0004] The large number of low voltage cabinet incoming line plastic shell circuit breakers also leads to high on-site equipment failure rate, large maintenance operation workload and other problems, which is not conducive to the unmanned construction of photovoltaic power station;

[0005] The low voltage cabinet is limited by the number of incoming line plastic shell and the size of incoming line plastic shell rated current, and cannot access a large inverter, thereby leading to that when the capacity of photovoltaic power station reaches a certain degree, it is difficult to increase the capacity, thus limiting the continuous increase of photovoltaic power generation capacity. INVENTION CONTENTS

[0006] In order to meet the industry development trend of cost reduction and efficiency increase, capacity increase of photovoltaic power station in new energy photovoltaic power generation field, the utility model discloses a novel low voltage cabinet of multi -circuit frame circuit breaker, which has the characteristics of reasonable structure design, low production and maintenance cost and convenient capacity increase.

[0007] In order to achieve the above invention purpose, the technical scheme adopted by the utility model is:

[0008] A novel low voltage cabinet of multi -circuit frame circuit breaker, which comprises a low voltage cabinet body, a main frame circuit breaker, an incoming line frame circuit breaker, a busbar I, a busbar II, a copper bar support insulator, a copper bar support insulating rod and a customer hanging cable bolt, the cabinet body is in left-right side symmetrical layout form, the main frame circuit breaker is installed on the upper side of the low voltage cabinet body close to the transformer, the upper port of the main frame circuit breaker is connected with the transformer by copper bar, the lower port is connected with the upper port of the incoming line frame circuit breaker by the low voltage cabinet busbar I, the incoming line frame circuit breaker is arranged on the middle and lower parts of the two sides of the cabinet body, the lower port is connected with the busbar II in the lower part of the low voltage cabinet, the lower port of the busbar II is installed with the customer hanging cable bolt, and the busbar II is fixed with the cabinet body through the copper bar support insulating rod.

[0009] The upper middle part of the cabinet body is provided with a lap joint channel, which is a lap joint position of a low-voltage side copper bar of a transformer and an upper port copper bar of a main frame circuit breaker.

[0010] The lower port of the incoming line frame circuit breaker is connected with an alternating current outgoing line end of the inverter through a busbar II, one incoming line frame circuit breaker can be connected with eight inverters, and one busbar II is respectively provided with one customer cable hanging bolt at the front and the back.

[0011] The busbar I is close to the inner wall of the cabinet body and is fixedly connected with the inner wall through the copper bar support insulator.

[0012] The cabinet body is provided with an incoming line port at the bottom, the incoming line of the inverter enters the busbar II through the port; the cabinet body is provided with a medium voltage ground wire connection hole at the bottom of one side, which facilitates the incoming and outgoing ground wire; the cabinet body is provided with an incoming line hole at the top and is connected with the cabinet body; the cabinet body wall at the main frame circuit breaker and the busbar II is provided with a heat dissipation hole.

[0013] The cabinet body further comprises a measurement and control device and a temperature and humidity controller, which are arranged at the upper ends of the two sides of the cabinet body and adjacent to the main frame circuit breaker.

[0014] The utility model discloses the beneficial effect is:

[0015] The utility model discloses a main frame circuit breaker is combined with the low voltage cabinet combination form of multichannel incoming line frame circuit breaker, replaces the structure form of numerous existing plastic -clad circuit breaker, and the structure design is reasonable, and the wiring layout is simple, can realize one incoming line frame circuit breaker and simultaneously access multichannel inverter, and the number of incoming line frame circuit breaker is far less than the number of traditional incoming line plastic -clad circuit breaker, therefore the workload of the operation of maintaining on -the -spot also reduces along with it, the new low voltage cabinet incoming line frame circuit breaker lower port of multichannel frame circuit breaker adopts busbar II and expands, and the user wiring mode is more flexible, can access the inverter of larger capacity and more road, to satisfy the industry trend of the capacity of photovoltaic inverter increasing unceasingly, reach the purpose of reducing cost and increasing efficiency. DRAWINGS

[0016] Figure 1 It is the structural schematic diagram of the utility model;

[0017] Figure 2 It is the internal schematic diagram of the cabinet body of the utility model embodiment.

[0018] 1. cabinet body 1, 2. main frame circuit breaker, 3. incoming line frame circuit breaker, 4. lap joint channel, 5. medium voltage ground wire connection hole, 6. heat dissipation hole, 7. measurement and control device, 8. top incoming line hole, 9. copper bar support insulator, 10. busbar I, 11. busbar II, 12. copper bar support insulator, 13. customer cable hanging bolt. CONCRETE IMPLEMENTING METHOD

[0019] The following is in conjunction with the appendix Figure 1 and attached Figure 2 The embodiments of this utility model will be described in detail.

[0020] A novel low-voltage switchgear with a multi-channel frame circuit breaker includes a low-voltage switchgear cabinet 1, a main frame circuit breaker 2, an incoming frame circuit breaker 3, busbar I 10, busbar II 11, copper busbar support insulators 9, copper busbar support insulating rods 12, and customer cable mounting bolts 13. The cabinet is arranged symmetrically on the left and right sides. The main frame circuit breaker 2 is installed on the upper part of the low-voltage switchgear cabinet, close to the transformer. The upper port of the main frame circuit breaker 2 is connected to the transformer via a copper busbar, and the lower port is connected to the upper port of the incoming frame circuit breaker 3 via the low-voltage switchgear busbar I 10. Multiple incoming frame circuit breakers 3 are arranged on the lower middle part of both sides of the cabinet. Their lower ports are connected to the busbar II 11 at the bottom of the low-voltage switchgear. The lower port of the busbar II 11 is fitted with customer cable mounting bolts 13. The busbar II 11 is fixed to the cabinet via the copper busbar support insulating rods 12.

[0021] The cabinet has an overlap channel 4 at the upper middle part, which is the overlap position between the low-voltage side copper busbar of the transformer and the upper copper busbar of the main frame circuit breaker 2.

[0022] The lower port of the incoming frame circuit breaker 3 is connected to the AC output terminal of the inverter through busbar II11. One incoming frame circuit breaker 3 can connect eight inverters. One customer cable mounting bolt 13 is installed at the front and back of one busbar II11.

[0023] The busbar I10 is routed close to the inner wall of the cabinet and is fixedly connected to the inner wall by copper busbar support insulator 9.

[0024] The cabinet has an inlet port at the bottom, through which the inverter inlet cable enters and connects to busbar II11; a medium-voltage grounding busbar wiring hole 5 is provided on one side of the bottom of the cabinet for easy access of the grounding wire; a top inlet port 8 is provided at the top of the cabinet for connection to the cabinet; and heat dissipation holes 6 are provided on the cabinet wall at the main frame circuit breaker 2 and busbar II11.

[0025] The cabinet also includes a monitoring and control device 7 and a temperature and humidity controller, which are located on the upper sides of the cabinet and adjacent to the main frame circuit breaker 2.

[0026] The low-voltage cabinet form of the main frame circuit breaker 2 cooperates with the multi-way incoming line frame circuit breaker 3, the incoming line plastic shell circuit breaker is cancelled, taking the 9MW photovoltaic box-type substation commonly seen in the market as an example, only 8 incoming line frame circuit breakers 3 with a rated current of 2000A need to be configured, therefore, the production efficiency of the box substation manufacturer can be effectively improved, and the production cost is reduced; the large number of incoming line plastic shell circuit breakers are replaced by the smaller number of incoming line frame circuit breakers 3, the failure rate of the equipment is reduced, and the intelligent and unmanned construction of the photovoltaic power station is helpful; the lower opening of the incoming line frame circuit breaker 3 is expanded by a copper bar, the user wiring mode is more flexible, and a larger capacity and more ways of inverters can be connected, so as to meet the industry trend of the increasing capacity of photovoltaic inverters.

[0027] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the principles of the present application, a number of improvements can be made, which should be considered as the protection scope of the present application without creating labor.

Claims

1. A new low voltage cubicle for multi-circuit frame circuit breakers, characterized in that: It includes low voltage cabinet body, main frame circuit breaker, incoming line frame circuit breaker, busbar I, busbar II, copper bar support insulator, copper bar support insulating rod and customer hanging cable bolt, the cabinet body is in left-right symmetrical layout form, the main frame circuit breaker is installed on the upper part of the low voltage cabinet body and close to the side of the transformer, the upper port of the main frame circuit breaker is connected with the transformer by copper bar, the lower port is connected with the upper port of the incoming line frame circuit breaker by low voltage cabinet busbar I, the incoming line frame circuit breaker is arranged in the middle and lower part of the cabinet body, the lower port is connected with the busbar II in the lower part of the low voltage cabinet, the lower port of the busbar II is installed with customer hanging cable bolt, and the busbar II is fixed with the cabinet body by copper bar support insulating rod.

2. The novel low voltage cubicle of multiple frame circuit breakers as claimed in claim 1 wherein: The upper middle part of the cabinet body is provided with a lap joint channel, which is the lap joint position of the copper bar of the low voltage side of the transformer and the upper port of the main frame circuit breaker.

3. The novel low voltage cubicle of multiple frame circuit breakers as claimed in claim 1 wherein: The lower port of the incoming line frame circuit breaker is connected with the alternating current outgoing line end of the inverter through the busbar II, and one incoming line frame circuit breaker can be connected with eight inverters.

4. The novel low voltage cubicle of multiple frame circuit breakers as claimed in claim 3 wherein: One customer hanging cable bolt is installed before and after one busbar II.

5. The new type low voltage cubicle of multiway frame circuit breaker as claimed in claim 1, wherein: The busbar I is close to the inner wall of the cabinet body and is fixedly connected with the inner wall through the copper bar support insulator.

6. The new type low voltage cubicle of multiway frame circuit breaker as claimed in claim 1, wherein: The bottom of the cabinet body is provided with an incoming line port, the incoming line of the inverter enters the busbar II through the port; the bottom of one side of the cabinet body is provided with a medium voltage ground wire connection hole, which facilitates the incoming and outgoing ground wire; the top of the cabinet body is provided with an incoming line hole connected with the cabinet body; the cabinet body wall at the positions of the main frame circuit breaker and the busbar II is provided with heat dissipation holes.

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