Intelligent medium voltage cabinet with fire-fighting function

Abstract

The utility model relates to an intelligent medium voltage cabinet with fire-fighting function, a bus chamber automatic fire extinguisher and a bus chamber arc light sensor are fixed in the bus chamber, a cable chamber automatic fire extinguisher, a cable chamber condensation remover and a cable chamber arc light sensor are fixed in the cable chamber, a circuit breaker handcart chamber automatic fire extinguisher, a circuit breaker handcart chamber condensation remover and a circuit breaker chamber arc light sensor are fixed in the circuit breaker handcart chamber, and an arc light protector, an electrical automatic fire extinguishing control screen, a condensation remover control screen and an intelligent temperature measurement control screen are arranged on the front panel of the cabinet body corresponding to the secondary instrument chamber. The utility model has the advantages of compact structure, reduced transformer substation equipment space occupation, improved reliability, intelligent operation and maintenance, long service life, high safety and the like.

Description

Technical Field

[0001] This utility model relates to a medium-voltage switchgear, specifically disclosing an intelligent medium-voltage switchgear with fire protection function. Background Technology

[0002] Currently, it is generally accepted that the interior of an indoor metal-clad withdrawable switchgear cabinet is divided into a low-voltage compartment located at the upper front, a circuit breaker compartment located in the middle front, a busbar compartment located at the upper rear, and a cable compartment located at the lower rear. The circuit breaker compartment is equipped with a circuit breaker, the busbar compartment is equipped with an upper contact box connected to the busbar of the adjacent cabinet, and the cable compartment is equipped with a lower contact box connected to the load side of the circuit breaker. The power supply is led from the cable compartment to the P1 of the current transformer, the P2 of the current transformer is connected to the lower contact box of the circuit breaker, and the upper contact box is connected to the busbar of the adjacent cabinet. Firstly, the components inside existing switchgear cabinets are all of the standard type or manually operated type, which cannot be remotely operated and the internal status of the switchgear cannot be monitored in real time. Secondly, when a fault occurs inside the switchgear cabinet and generates an arc that causes a fire, the switchgear cabinet has no equipment that can quickly cut off the fault. Thirdly, after an open flame occurs, traditional switchgear cabinets require maintenance personnel to arrive on-site with fire extinguishers after a period of time, by which time some damage and impact have already been caused. Moreover, traditional switchgear cabinets can only be equipped with external fire extinguishing equipment and cannot extinguish the fire at its source. Summary of the Invention

[0003] The purpose of this utility model is to overcome the shortcomings of the existing technology and provide an intelligent medium-voltage switchgear with fire protection function.

[0004] According to the technical solution provided by this utility model, the intelligent medium-voltage switchgear with fire protection function includes a cabinet and a partition fixed in the cabinet. The cabinet includes a front panel, a rear panel, a left side panel, a right side panel, a top panel, and a bottom panel. The partition divides the internal space of the cabinet into independent secondary instrument compartments located at the upper front, circuit breaker trolley compartments in the middle front, cable compartments at the lower front, busbar compartments at the upper rear, and cable compartments at the lower rear.

[0005] A circuit breaker is fixed in the circuit breaker compartment. The circuit breaker has an upper contact arm and a lower contact arm. Both the upper and lower contact arms of the circuit breaker extend into the busbar compartment.

[0006] A through-wall bushing is installed on the left or right side panel of the cabinet at the location corresponding to the busbar compartment and the top of each insulator. Three insulators, one current transformer and two contact boxes are fixed in the busbar compartment. A first busbar is fixed on the top of each insulator. A contact box is fixed on the upper and lower contact arms of the circuit breaker in the truck compartment. The other end of the first busbar is fixed on the upper contact arm of the circuit breaker in the truck compartment. Three second busbars are fixed on the lower contact arm of the circuit breaker in the truck compartment. The other end of the second busbars is fixed on one side of the current transformer. Three third busbars are fixed on the other side of the current transformer.

[0007] Three cables, three overvoltage protectors, and one grounding switch are fixed in the cable room. Three live sensors are fixed on the grounding switch.

[0008] The other end of the three third busbars is fixed to the corresponding cable. A fourth busbar is fixed on each third busbar. The other end of each fourth busbar is connected to the corresponding live sensor. Each live sensor is connected to the corresponding overvoltage protector through a fifth busbar.

[0009] A rear door is provided on the rear panel of the cabinet corresponding to the cable compartment, and a rear door lock is provided on the rear door;

[0010] A front door is provided on the front panel of the cabinet corresponding to the circuit breaker truck compartment. The front door is equipped with a front door lock and a manual operation hole for the circuit breaker truck. The position of the manual operation hole for the circuit breaker truck is matched with the circuit breaker in the truck compartment.

[0011] A circuit breaker contact temperature sensor is fixed on both the upper and lower contact arms of the circuit breaker in the truck compartment. A busbar overlap temperature sensor is fixed on the first busbar corresponding to the top position of each insulator. A cable overlap temperature sensor is fixed on the third busbar corresponding to the connection position between each third busbar and the cable.

[0012] The busbar room is equipped with an automatic fire extinguisher and an arc flash sensor. The cable room is equipped with an automatic fire extinguisher, a decondenser and an arc flash sensor. The circuit breaker truck room is equipped with an automatic fire extinguisher, a decondenser and an arc flash sensor.

[0013] An arc flash protector, an automatic electrical fire extinguishing control panel, a decondenser control panel, and an intelligent temperature measurement control panel are installed on the front panel of the cabinet in the corresponding secondary instrument room.

[0014] Each of the circuit breaker contact temperature sensors, busbar joint temperature sensors, and cable joint temperature sensors is connected to the intelligent temperature control panel via a low-voltage wire.

[0015] The automatic fire extinguishers in the busbar room, cable room, and circuit breaker truck room are all connected to the electrical automatic fire extinguishing control panel via low-voltage wires.

[0016] The arc flash sensor in the cable compartment, the arc flash sensor in the busbar compartment, and the arc flash sensor in the circuit breaker compartment are all connected to the arc flash protector via low-voltage wires.

[0017] The current transformer is connected to the integrated protection device via a low-voltage wire.

[0018] Both the cable compartment decondenser and the circuit breaker truck compartment decondenser are connected to the decondenser control panel via low-voltage wires.

[0019] Preferably, the front panel of the cabinet in the corresponding secondary instrument room is also equipped with three changeover switches, several indicator lights, and several buzzers; each aviation socket terminal of the handcart compartment circuit breaker is connected in parallel to the corresponding changeover switch, indicator light, and buzzer via a low-voltage wire.

[0020] Preferably, an observation window for the circuit breaker compartment is also provided on the front panel of the cabinet corresponding to the circuit breaker compartment.

[0021] Preferably, an observation window for the cable compartment is also provided on the front panel of the cabinet corresponding to the cable compartment.

[0022] Preferably, the rear door is also equipped with a cable compartment observation window and an internal lighting lamp.

[0023] Preferably, the rear door lock is an electromagnetic lock.

[0024] Preferably, the front door lock is a mechanical lock.

[0025] Preferably, the circuit breaker in the truck compartment is an intelligent circuit breaker using an electric chassis, and an ultrasonic detector is installed on the circuit breaker in the truck compartment.

[0026] Preferably, a comprehensive protector is provided on the front panel of the cabinet corresponding to the secondary instrument room, and the current transformer is connected to the comprehensive protector via a low-voltage wire.

[0027] This utility model has the advantages of compact structure, reduced space occupation of substation equipment, improved reliability, intelligent operation and maintenance, long service life, and high safety. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the installation of internal components of the cabinet in this utility model.

[0029] Figure 2 This is the front view of the cabinet in this utility model.

[0030] Figure 3This is a rear view of the cabinet in this utility model.

[0031] Explanation of reference numerals in the attached diagram: 1 is a lifting ring, 2 is an insulator, 3 is a wall bushing, 5-1 is an automatic fire extinguisher in the busbar compartment, 5-2 is an automatic fire extinguisher in the cable compartment, 5-3 is an automatic fire extinguisher in the circuit breaker truck compartment, 6 is a current transformer, 7 is a cable, 8-1 is a condensate decondenser in the cable compartment, 8-2 is a condensate decondenser in the circuit breaker truck compartment, 9 is an overvoltage protector, 10-1 is an arc flash sensor in the cable compartment, 10-2 is an arc flash sensor in the busbar compartment, 10-3 is an arc flash sensor in the circuit breaker compartment, 11 is a circuit breaker in the truck compartment, 12 is an ultrasonic detector, 13-1 is a circuit breaker contact temperature sensor, 13-2 is a busbar joint temperature sensor, 1 3-3 is a temperature sensor at the cable splice; 14 is a contact box; 15 is an arc flash protector; 16 is a comprehensive protector; 17 is an automatic electrical fire extinguishing control panel; 18 is a decondenser control panel; 19 is an intelligent temperature measurement control panel; 20 is a changeover switch; 21 is an indicator light; 22 is a buzzer; 23 is a rear door lock; 24 is a front door lock; 25 is a manual operation hole for the circuit breaker truck; 26 is an observation window for the circuit breaker truck compartment; 27 is an observation window for the cable compartment; 28 is an observation window for the cable compartment; 29 is an internal lighting fixture; 31 is a busbar compartment; 32 is a cable compartment; 33 is a circuit breaker truck compartment; 34 is a secondary instrument compartment; 35 is a cable compartment. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of this utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0033] An intelligent medium-voltage switchgear with fire protection function, such as Figure 1-3 As shown, the cabinet includes a cabinet body and partitions fixed inside the cabinet body. The cabinet body includes a front panel, a rear panel, a left side panel, a right side panel, a top panel, and a bottom panel. A lifting ring 1 is fixed on the top panel. The partitions divide the internal space of the cabinet body into separate secondary instrument compartment 34 located at the upper front side, circuit breaker trolley compartment 33 located in the middle front side, cable compartment 35 located at the lower front side, busbar compartment 31 located at the upper rear side, and cable compartment 32 located at the lower rear side.

[0034] A circuit breaker 11 is fixed inside the circuit breaker compartment 33. The circuit breaker 11 has an upper contact arm and a lower contact arm, and both the upper contact arm and the lower contact arm of the circuit breaker 11 extend into the busbar compartment 31.

[0035] A through-wall bushing 3 is provided on the left or right side panel of the cabinet corresponding to the position of the busbar compartment 31 and the top position of each insulator 2. Three insulators 2, one current transformer 6 and two contact boxes 14 are fixed in the busbar compartment 31. A first busbar is fixed on the top of each insulator 2. A contact box 14 is fixed on the upper and lower contact arms of the handcart compartment circuit breaker 11. The other end of the first busbar is fixed on the upper contact arm of the handcart compartment circuit breaker 11. Three second busbars are fixed on the lower contact arm of the handcart compartment circuit breaker 11. The other end of the second busbars is fixed on one side of the current transformer 6. Three third busbars are fixed on the other side of the current transformer 6.

[0036] Three cables 7, three overvoltage protectors 9 and a grounding switch 36 are fixed in the cable compartment 32. Three live sensors 37 are fixed on the grounding switch 36.

[0037] The other end of the three third busbars is fixed to the corresponding cable 7. A fourth busbar is fixed on each third busbar. The other end of each fourth busbar is connected to the corresponding live sensor 37. Each live sensor 37 is connected to the corresponding overvoltage protector 9 through a fifth busbar.

[0038] A rear door is provided on the rear panel of the cabinet corresponding to the cable compartment 32, and a rear door lock 23 is provided on the rear door;

[0039] A front door is provided on the front panel of the cabinet corresponding to the circuit breaker truck compartment 33. A front door lock 24 and a circuit breaker truck manual operation hole 25 are provided on the front door. The position of the circuit breaker truck manual operation hole 25 is matched with the circuit breaker 11 in the truck compartment.

[0040] A circuit breaker contact temperature sensor 13-1 is fixed on both the upper and lower contact arms of the circuit breaker 11 in the truck compartment. A busbar overlap temperature sensor 13-2 is fixed on the first busbar corresponding to the top position of each insulator 2. A cable overlap temperature sensor 13-3 is fixed on the third busbar corresponding to the connection position between each third busbar and the cable 7.

[0041] Busbar compartment 31 is equipped with an automatic fire extinguisher 5-1 and an arc flash sensor 10-2. Cable compartment 32 is equipped with an automatic fire extinguisher 5-2, a decondenser 8-1 and an arc flash sensor 10-1. Circuit breaker truck compartment 33 is equipped with an automatic fire extinguisher 5-3, a decondenser 8-2 and an arc flash sensor 10-3.

[0042] An arc flash protector 15, an automatic electrical fire extinguishing control panel 17, a decondenser control panel 18 and an intelligent temperature measurement control panel 19 are provided on the front panel of the cabinet corresponding to the secondary instrument room 34.

[0043] Each of the circuit breaker contact temperature sensor 13-1, busbar joint temperature sensor 13-2, and cable joint temperature sensor 13-3 is connected to the intelligent temperature control panel 19 via a low-voltage wire.

[0044] The automatic fire extinguisher 5-1 in the busbar room, the automatic fire extinguisher 5-2 in the cable room, and the automatic fire extinguisher 5-3 in the circuit breaker truck room are all connected to the electrical automatic fire extinguishing control panel 17 via low-voltage wires.

[0045] The arc flash sensor 10-1 in the cable compartment, the arc flash sensor 10-2 in the busbar compartment, and the arc flash sensor 10-3 in the circuit breaker compartment are all connected to the arc flash protector 15 via low-voltage wires.

[0046] The cable compartment decondenser 8-1 and the circuit breaker truck compartment decondenser 8-2 are both connected to the decondenser control panel 18 via low-voltage wires.

[0047] On the front panel of the cabinet corresponding to the secondary instrument compartment 34, there are also three changeover switches 20, several indicator lights 21, and several buzzers 22; each aviation socket terminal of the handcart compartment circuit breaker 11 is connected in parallel to the corresponding changeover switch 20, indicator light 21, and buzzer 22 via a low-voltage wire. The changeover switch 20 can be used to open and close the handcart compartment circuit breaker 11, the indicator light 21 can indicate opening / closing, position, and fault, and the buzzer 22 can provide a fault alarm.

[0048] A circuit breaker truck compartment observation window 26 is also provided on the front panel of the cabinet corresponding to the circuit breaker truck compartment 33.

[0049] A cable compartment observation window 27 is also provided on the front panel of the cabinet corresponding to the cable compartment 35.

[0050] The rear door is also equipped with a cable compartment observation window 28 and an internal lighting lamp 29.

[0051] The rear door lock 23 is an electromagnetic door lock.

[0052] The front door lock 24 is a mechanical lock.

[0053] The circuit breaker 11 in the truck compartment is an intelligent circuit breaker using an electric chassis. An ultrasonic detector 12 is installed on the circuit breaker 11 in the truck compartment. When a manual operating tool is inserted into the manual operation hole 25 of the circuit breaker truck compartment to move the circuit breaker 11 in or out, the ultrasonic detector 12 can accurately locate the circuit breaker 11 in or out.

[0054] A comprehensive protector 16 is provided on the front panel of the cabinet corresponding to the secondary instrument room 34, and the current transformer 6 is connected to the comprehensive protector 16 through a low-voltage wire.

[0055] The three-phase main power supply line enters the busbar compartment 31 through the wall bushing 3 and is fixed to the top of the corresponding first busbar and the corresponding insulator 2.

[0056] Throughout the entire operating period, this utility model can monitor the temperatures of the circuit breaker contact temperature sensor 13-1, the busbar joint temperature sensor 13-2, and the cable joint temperature sensor 13-3 in real time through the intelligent temperature control panel 19, and can set temperature over-limit alarms.

[0057] When an electric arc occurs in the busbar compartment 31, cable compartment 32, and circuit breaker compartment 33 due to human operation or equipment failure, the arc flash protector 15 can quickly cut off the fault. In conjunction with the electrical fire extinguishing control panel 17, the open flames in the busbar compartment 31, cable compartment 32, and circuit breaker compartment 33 can be extinguished by the automatic fire extinguishers 5-1 in the busbar compartment, 5-2 in the cable compartment, and 5-3 in the circuit breaker compartment, ensuring that the accident does not spread.

[0058] In conjunction with the decondenser control panel 18 and through the cable compartment decondenser 8-1 and the circuit breaker truck compartment decondenser 8-2, condensation in the cable compartment 32 and the circuit breaker truck compartment 33 can be eliminated, thus avoiding circuit faults caused by reduced insulation due to condensation.

[0059] The integrated protector 16 judges the operating status of the power system by collecting electrical parameters such as current, voltage, power, and frequency in real time. When faults such as short circuit, overload, and grounding are detected, it can quickly trigger protection actions (such as disconnecting the faulty circuit) based on preset logic.

[0060] Finally, it should be noted that the above specific embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although this utility model has been described in detail with reference to examples, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications and substitutions should be covered within the scope of the claims of this utility model.

Claims

1. An intelligent medium-voltage switchgear with fire protection function, comprising a cabinet and partitions fixed inside the cabinet. The cabinet includes a front panel, a rear panel, a left side panel, a right side panel, a top panel, and a bottom panel. The partitions divide the internal space of the cabinet into independent secondary instrument compartments (34) located at the upper front, circuit breaker truck compartments (33) located in the middle front, cable compartments (35) located at the lower front, busbar compartments (31) located at the upper rear, and cable compartments (32) located at the lower rear. A circuit breaker (11) is fixed inside the circuit breaker compartment (33). The circuit breaker (11) has an upper contact arm and a lower contact arm. Both the upper contact arm and the lower contact arm of the circuit breaker (11) extend into the busbar compartment (31). A wall bushing (3) is provided on the left or right side panel of the cabinet corresponding to the busbar compartment (31) and the top of each insulator (2). Three insulators (2), one current transformer (6) and two contact boxes (14) are fixed in the busbar compartment (31). A first busbar is fixed on the top of each insulator (2). A contact box (14) is fixed on the upper and lower contact arms of the handcart compartment circuit breaker (11). The other end of the first busbar is fixed on the upper contact arm of the handcart compartment circuit breaker (11). Three second busbars are fixed on the lower contact arm of the handcart compartment circuit breaker (11). The other end of the second busbar is fixed on one side of the current transformer (6). Three third busbars are fixed on the other side of the current transformer (6). Three cables (7), three overvoltage protectors (9) and a grounding switch (36) are fixed in the cable room (32). Three live sensors (37) are fixed on the grounding switch (36). The other end of the three third busbars is fixed to the corresponding cable (7). A fourth busbar is fixed on each third busbar. The other end of each fourth busbar is connected to the corresponding live sensor (37). Each live sensor (37) is connected to the corresponding overvoltage protector (9) through a fifth busbar. A rear door is provided on the rear panel of the cabinet corresponding to the cable room (32), and a rear door lock (23) is provided on the rear door. A front door is provided on the front panel of the cabinet of the corresponding circuit breaker truck compartment (33). A front door lock (24) and a circuit breaker truck manual operation hole (25) are provided on the front door. The position of the circuit breaker truck manual operation hole (25) is matched with the circuit breaker (11) in the truck compartment. Its characteristics are: A circuit breaker contact temperature sensor (13-1) is fixed on the upper and lower contact arms of the circuit breaker (11) in the truck compartment. A busbar overlap temperature sensor (13-2) is fixed on the first busbar corresponding to the top position of each insulator (2). A cable overlap temperature sensor (13-3) is fixed on the third busbar corresponding to the connection position of each third busbar and cable (7). An automatic fire extinguisher (5-1) and an arc light sensor (10-2) for the busbar compartment (31) are fixed in the busbar compartment (31). An automatic fire extinguisher (5-2), an anti-condensation device (8-1), and an arc light sensor (10-1) for the cable compartment (32) are fixed in the cable compartment. An automatic fire extinguisher (5-3), an anti-condensation device (8-2), and an arc light sensor (10-3) for the circuit breaker compartment (33) are fixed in the circuit breaker compartment. An arc protector (15), a comprehensive protector (16), an automatic electrical fire extinguishing control panel (17), a decondenser control panel (18) and an intelligent temperature measurement control panel (19) are provided on the front panel of the cabinet in the corresponding secondary instrument room (34). Each of the circuit breaker contact temperature sensors (13-1), busbar joint temperature sensors (13-2), and cable joint temperature sensors (13-3) is connected to the intelligent temperature control panel (19) via a low-voltage wire. The automatic fire extinguisher (5-1) in the busbar room, the automatic fire extinguisher (5-2) in the cable room, and the automatic fire extinguisher (5-3) in the circuit breaker truck room are all connected to the electrical automatic fire extinguishing control panel (17) via low-voltage wires. The arc flash sensor (10-1) in the cable compartment, the arc flash sensor (10-2) in the busbar compartment, and the arc flash sensor (10-3) in the circuit breaker compartment are all connected to the arc flash protector (15) via low-voltage wires; The cable compartment decondenser (8-1) and the circuit breaker truck compartment decondenser (8-2) are both connected to the decondenser control panel (18) via low-voltage wires.

2. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: The front panel of the cabinet corresponding to the secondary instrument room (34) is also equipped with three changeover switches (20), several indicator lights (21) and several buzzers (22); each aviation socket terminal of the handcart room circuit breaker (11) is connected in parallel to the corresponding changeover switch (20), indicator light (21) and buzzer (22) through a low-voltage wire.

3. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: A circuit breaker truck compartment observation window (26) is also provided on the front panel of the cabinet corresponding to the circuit breaker truck compartment (33).

4. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: A cable compartment observation window (27) is also provided on the front panel of the cabinet corresponding to the cable compartment (35).

5. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: The rear door is also equipped with a cable room observation window (28) and an internal lighting lamp (29).

6. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: The rear door lock (23) is an electromagnetic door lock.

7. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: The front door lock (24) is a mechanical lock.

8. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: The circuit breaker (11) in the truck compartment is an intelligent circuit breaker using an electric chassis vehicle, and an ultrasonic detector (12) is installed on the circuit breaker (11).

9. The intelligent medium-voltage switchgear with fire protection function as described in claim 1, characterized in that: A comprehensive protector (16) is provided on the front panel of the cabinet corresponding to the secondary instrument room (34), and the current transformer (6) is connected to the comprehensive protector (16) through a low-voltage wire.

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