Feeder cabinet with electrical fireproof current-limiting protector

Abstract

A feeder cabinet with an electrical fireproof current-limiting protector comprises a cabinet body, a bus chamber is arranged behind the upper end of the cabinet body and used for supplying electric energy, a plurality of conductive copper bars are arranged in the bus chamber and connected with an upper contact of a knife switch through a first connecting bar, and a lower contact of the conductive copper bars is connected with an upper contact of a board front wiring module through a second connecting bar. The upper contact is connected with the upper contact of the protector, the lower contact is connected with the upper contact of the protector, and the lower contact is used for wiring with a load. The defects of large short-circuit current, long short-circuit current cut-off time, large arc spark generated during short circuit and the like of a traditional circuit breaker and an air switch can be effectively overcome. The feeder cabinet is basic electrical power distribution equipment in an electrical system, is mainly used for distributing and providing power for external equipment, is commonly used for isolating current output by a power distribution network and a high-voltage transformer, and has the effects of electrical insulation, current transmission, overload protection, short-circuit protection and the like.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of feeder cabinet especially relates to a feeder cabinet with electrical fireproof current -limiting protector. BACKGROUND

[0002] When facing short-circuit fault, the short-circuit current of traditional feeder cabinet will increase sharply in an instant, which may cause serious damage to the line, electrical equipment and the entire power system, such as burning the wire, damaging the insulation layer of electrical equipment, and even causing electrical fire. The feeder cabinet with electrical fireproof current-limiting protector aims to control the short-circuit current within a safe range by quickly limiting the size of the short-circuit current, reducing the impact and damage of short-circuit current on the system.

[0003] The problem of long time to cut off short-circuit current: In the past, the protection device such as electromagnetic tripping circuit breaker, when detecting short-circuit, the tripping device acts to break the circuit usually in milliseconds. For some occasions that require extremely high response speed to short-circuit current, such breaking time is still too long. The feeder cabinet with electrical fireproof current-limiting protector can quickly limit the short-circuit current within microseconds, greatly shortening the response time to short-circuit fault compared to traditional circuit breakers, and protecting the circuit and equipment more quickly.

[0004] The problem of large arc spark generated during short-circuit: Large current generated during short-circuit is easy to cause arc spark, which not only further damages electrical equipment, but also may ignite surrounding flammable materials, thereby causing electrical fire, greater safety hazards and property losses. The feeder cabinet with electrical fireproof current-limiting protector can significantly reduce the arc spark generated during short-circuit by quickly limiting current, reducing the risk of fire caused by arc.

[0005] Overload protection problem: When the load in the circuit exceeds the rated load, the traditional feeder cabinet may not be able to protect in time and effectively, and long-term overload will cause the line and equipment to heat up, accelerate insulation aging, and increase the probability of failure. The feeder cabinet with electrical fireproof current-limiting protector can monitor the circuit current in real time, and when overload occurs and the duration exceeds the set value, it starts current-limiting protection to prevent the line and equipment from being damaged due to overload.

[0006] Temperature monitoring and over-temperature protection problem: Electrical components inside the feeder cabinet will generate heat during operation, especially during high-load operation or when there is a fault, the temperature may be too high, which not only affects the performance and life of the equipment, but also may cause a fire. The invention needs to solve how to monitor the temperature inside the feeder cabinet in real time, and take measures such as starting the cooling device or conducting current-limiting protection when the temperature exceeds the safety threshold, to ensure that the equipment operates within the normal temperature range.

[0007] Leakage current monitoring and protection problem: leakage current may occur in the line, which may be caused by line insulation damage, equipment failure, etc. Leakage current not only causes waste of electric energy, but also may cause electric shock accident and electrical fire. Utility model content

[0008] To solve the above problems, the technical scheme provides a feeder cabinet with an electrical fireproof current limiting protector, which can solve the problems of long short-circuit current cutting-off time, large arc spark generated during short circuit, overload protection, temperature monitoring and over-temperature protection, and leakage current monitoring and protection.

[0009] To achieve the above purpose, the technical scheme is as follows:

[0010] A feeder cabinet with an electrical fireproof current limiting protector, comprising a cabinet body, a busbar chamber is arranged at the upper end of the cabinet body, which is used to supply electric energy, a plurality of conductive copper bars are arranged in the busbar chamber, the upper contact of the knife switch is connected with the conductive copper bars through a first connecting row, the lower contact is connected with the upper contact of the panel front wiring module through a second connecting row, the lower contact is connected with the upper contact of the protector, and the lower contact is used to be connected with the load.

[0011] In some embodiments, the protector is connected with a mounting beam, and the cabinet body is provided with a fixing beam for connecting with the mounting beam.

[0012] In some embodiments, a wiring groove is arranged at the rear of the cabinet body, and one end of the wiring groove is provided with a wiring bending plate.

[0013] In some embodiments, a front plate on which an instrument is mounted is arranged at the front of the upper end of the cabinet body.

[0014] In some embodiments, a plurality of heat dissipation fans are arranged at the rear of the cabinet body.

[0015] The application has the following beneficial effects:

[0016] The feeder cabinet with an electrical fireproof current limiting protector of the application is an electrical equipment for power distribution and protection, which can effectively overcome the drawbacks of large short-circuit current, long short-circuit current cutting-off time, large arc spark generated during short circuit, etc. of the traditional circuit breaker and air switch. The feeder cabinet is a basic electrical power distribution equipment in an electrical system, and mainly functions to distribute and provide power supply for external equipment, and is commonly used to isolate the current output by the power distribution network and the high-voltage transformer, and plays the roles of electrical insulation, current transmission, overload protection, short-circuit protection, etc. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiment description will be briefly introduced as follows.

[0018] Figure 1 is a structural schematic of an embodiment of the present application Figure 1

[0019] Figure 2 is a structural schematic of an embodiment of the present application Figure 2 . DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects solved by the present application more clear and explicit, the present application will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and do not limit the present application.

[0021] Please refer to Figures 1-2 , a feeder cabinet with an electric fireproof current limiting type protector, comprising a cabinet body, a busbar chamber is arranged at the rear upper end of the cabinet body, which is used to supply electric energy, a plurality of conductive copper bars 1 are arranged in the busbar chamber, the conductive copper bars 1 are connected with the upper contact of a knife switch 3 through a first connecting bar 2, the lower contact is connected with the upper contact of a panel front wiring module 5 through a second connecting bar 4, and the lower contact is connected with the upper contact of a protector 6, and the lower contact is used to be connected with a load.

[0022] In the present embodiment, the protector 6 is connected with a mounting beam 7, and a fixing beam 8 for connecting with the mounting beam 7 is arranged in the cabinet body.

[0023] In the present embodiment, a wiring groove 9 is arranged at the rear of the cabinet body, and a wiring bending plate 10 is arranged at one end of the wiring groove 9.

[0024] In the present embodiment, a front plate 11 on which an instrument is mounted is arranged at the front upper end of the cabinet body.

[0025] In the present embodiment, a plurality of heat dissipation fans 12 are arranged at the rear of the cabinet body.

[0026] 1) Short circuit current limitation: the peak value of short circuit current of a traditional feeder cabinet can reach several times or even dozens of times of normal current when a short circuit occurs, which can cause a huge impact on the line and equipment. The electric fireproof current limiting type protector of the present feeder cabinet can respond within microseconds to limit the short circuit current within a safety threshold, for example, limit the short circuit current which can be as high as 100kA to about 10kA, which greatly reduces the damage risk of short circuit current to the insulation layer of electrical equipment, the line connection point and the like, and effectively prevents electrical fire caused by short circuit.

[0027] ​2) Overload protection: When the line is overloaded, the protector monitors the current in real time. If the overload lasts for more than the set time (adjustable from 3 to 60 seconds), the current limiting measure is quickly activated to avoid overheating of the line and equipment due to long-term overload, which may cause insulation aging and damage, reduce fire hazards, and ensure the safe and stable operation of the electrical system.

[0028] 3) Leakage monitoring and protection: It can accurately monitor the leakage current in the line. Once the leakage current exceeds the set alarm value, an audible and visual alarm signal is immediately sent out, and the current limiting protection can be activated according to the demand to prevent electric shock accidents and electrical fires caused by leakage, providing reliable protection for personnel and equipment safety.

[0029] 4) Over-temperature protection: Real-time monitoring of electrical components and line temperature, once the temperature is too high, quickly take current limiting measures and alarm, prevent overheating caused by fire, ensure the equipment in the safe temperature range.

[0030] 5) Fast fault response: From detection to implementation of current limiting action, the whole process is completed in a very short time, compared with traditional protection devices, greatly shortens the fault duration, reduces the disturbance of the fault to the power system, ensures the stability of the power system, and reduces the probability and time of power failure caused by the fault.

[0031] 6) Reduce equipment loss: By effectively limiting the fault current, the impact and damage of electrical equipment during a fault are reduced, prolonging the service life of the equipment, reducing maintenance and replacement costs, and improving the reliability and stability of the power system.

[0032] 7) Improve power supply continuity: In the event of short circuit, overload and other faults, fast current limiting protection measures can prevent the expansion of the fault range, ensure normal power supply of non-fault lines, improve the reliability and continuity of the entire power supply system, and ensure the stable operation of important loads.

[0033] 8) Real-time monitoring and remote control: The intelligent monitoring module collects real-time electrical parameters and operating state information in the feeder cabinet, uploads them to the background monitoring system through the communication network, and the operation and maintenance personnel can remotely monitor the operation of the feeder cabinet at any time and place, and also can remotely set and control some parameters, improving the efficiency and convenience of operation and maintenance management.

[0034] 9) Data analysis and early warning: The background monitoring system analyzes and processes the collected data to generate load curves, power statistics and other reports to provide data support for the optimized operation of the power system. At the same time, through the analysis of the data, potential equipment failures can be predicted in advance, and early warning signals are sent out to achieve preventive maintenance and reduce the probability of failure.

[0035] 10) Integration with other systems: The feeder cabinet has good communication interface and protocol compatibility, can be integrated with smart grid, building automation system and other systems, realize data sharing and collaborative work, improve the intelligent level and management efficiency of the whole system.

[0036] The above merely describes the preferred embodiments of the present application, and is not intended to limit the scope of the application. Other embodiments having the same or similar principles and basic structures as the present application are within the scope of the present application.

Claims

1. A feeder cabinet with electrically fireproof current limiting protector, characterized in that, The utility model relates to a cabinet, which comprises a cabinet body, a busbar chamber is arranged at the rear upper end of the cabinet body, and the busbar chamber is used for supplying electric energy, a plurality of conductive copper bars (1) are arranged in the busbar chamber, the upper contact of a knife switch (3) is connected to the conductive copper bars (1) through a first connecting bar (2), the upper contact of a front panel wiring module (5) is connected to the lower contact of the knife switch (3) through a second connecting bar (4), the upper contact of a protector (6) is connected to the lower contact of the knife switch (3), and the lower contact is used for being connected to a load.

2. A feeder cabinet with electrically fireproof current limiting protector according to claim 1, characterized in that: The protector (6) is connected to a mounting beam (7), and the cabinet body is provided with a fixing beam (8) used for being connected to the mounting beam (7).

3. A feeder cabinet with electrically fireproof current limiting protector according to claim 2, characterized in that: A wiring groove (9) is arranged at the rear of the cabinet body, and one end of the wiring groove (9) is provided with a wiring bending plate (10).

4. The power distribution cabinet with electrically fireproof current limiting protector of claim 1, wherein: A front plate (11) on which an instrument is mounted is arranged at the front upper end of the cabinet body.

5. A power distribution cabinet with electrically fireproof current limiting protector according to claim 1, characterized in that: A plurality of heat dissipation fans (12) are arranged at the rear of the cabinet body.

Images