KR102060568B1 - Switchgear assembly - Google Patents

Abstract

The present invention relates to a switchgear assembly having a diffusion-type fire extinguisher and a fire monitoring system applied thereto. The switchgear assembly having a diffusion-type fire extinguisher and a fire monitoring system applied thereto is provided in an inner space to prevent fire through the fire monitoring system which detects a temperature of a switchgear and a bus bar inside the switchboard, and prevents secondary fire from a heat source or a fire occurrence and to extinguish the fire in the early stage through the diffusion-type fire extinguisher in the event of abnormality or a sudden fire occurrence in the fire monitoring system.

Description

Switchgear assembly with diffusion extinguisher and fire monitoring system {SWITCHGEAR ASSEMBLY}

The present invention relates to a switchgear assembly to which a diffusion type fire extinguisher and a fire monitoring system are applied, which is provided in an inner space to prevent a fire through a fire monitoring system for detecting a temperature of a switchgear and a temperature of a busbar inside a switchgear, and a fire detection system. The present invention relates to a switchgear assembly in which a diffuse fire extinguisher and a fire monitoring system are applied to prevent a secondary fire from a heat source or a fire and to extinguish the fire at the initial stage through a diffuse fire extinguisher even in the event of an abnormal or unexpected fire.

In general, the switchgear facility is a power supply device that supplies the power required for apartments, buildings, schools, factories, ports, etc. by converting extra high pressure to low pressure. In other words, after receiving high voltage of 3,300V or 6,600V from the power distribution line of substation, it should be transformed into commercial voltage again.In particular, in the electric equipment of large-scale buildings, 22.9kV special high voltage is received and transformed into commercial voltage again. The distribution system is a switchgear.

Most switchgear equipment includes a transformer, an optimal operation controller and a power monitoring controller of the transformer, and is manufactured in a single case of high and low pressure type having a multilayer structure to block external moisture or foreign substances and to facilitate construction. do.

Especially in switchboards, distribution boards are houses that we live, factories, buildings, schools, terminals, airports, etc. Electrical installation, but is used in all areas of use of the electrical overload, short circuit, and fatigue of the wire coating due to heat degradation Exposed to fire hazards. It is true that existing switchboard fire extinguishing systems are so large that they cannot be installed inside small switchboards of less than 2000L or give up fire prevention.

The prior art related to the switchgear for preventing the fire is Patent Registration No. 10-1440492 "distribution switchboard with electrical fire prevention and overload blocking function,"

The prior art is connected to the neutral line of the switchboard harmonic detection sensor for detecting harmonics, harmonics detection unit including a harmonic filter for reducing the harmonics generated in the neutral and harmonic temperature sensing sensor for sensing the temperature of the harmonic filter, load of the switchboard A plurality of leakage current sensing sensors connected to each output, a current sensing sensor connected in series on the line of the switchgear to detect the current flowing in each three phases, connected in parallel on the line of the switchgear to detect the voltage of each three phases The voltage sensor, the first transformer installed in the instrument transformer (PT) installed in the high voltage section of the switchgear and the CT transformer (CT), the second installed in the CT transformer installed in the low pressure section of the switchgear (CT) Temperature sensor including a temperature sensor and a third temperature sensor installed at the conductor and the connecting part of the switchgear, and an insulation breakdown that occurs in the switchgear Arc control and harmonic detection unit for detecting the occurrence of the arc caused by the leakage current sensor, current sensor, voltage sensor, temperature sensor and arc sensor connected to the control device for controlling the blocking device installed in the switchgear; The circuit breaker includes a plurality of circuit breakers (MCCB) connected to the load output terminal of the low voltage section, an air circuit breaker (ACB) installed at the low voltage section, and a vacuum circuit breaker (VCB) installed at the high voltage section. Connected to the output terminal and the input terminal of each of the plurality of leakage current sensing sensors, the control device cuts the load output by operating the corresponding circuit breaker when at least one of the plurality of leakage current sensing sensors detects a leakage current, and detects harmonics When the harmonic current is detected by the sensor, the vacuum breaker operates to cut off the power, and the arc sensor detects the arc generation signal. In case of detection, the technology to cut off the power by operating the vacuum breaker is proposed.

However, the conventional art is to prevent the fire by simply blocking the power supply when the fire occurs or the temperature rises, it is possible to prevent the fire in the case of the indication of the fire, if the actual flame occurs to extinguish it There is a limit that is difficult to make.

Therefore, in the event of a fire, the user can extinguish a fire directly by using a fire extinguisher or use other extinguishing devices, which seriously damage the devices inside the switchboard, which not only has the inconvenience and economic loss of replacing the entire switchboard for restarting. In industrial sites, serious production disruptions occur during times when electricity is not available.

Therefore, in order to solve this, techniques with a separate fire extinguishing device have been proposed,

Such a prior art may be described in Korean Patent No. 10-0998531, "Remote temperature / fire detection system and method of a switchgear."

The prior art is equipped with a flame detection sensor to detect not only the overheating but also the occurrence of the flame, and when a problem occurs (for example, current leakage, overheating, spark generation, etc.) to capture the internal image for a certain time to the remote manager By transmitting the information, the administrator can quickly identify the problem and the cause of the problem and respond quickly. In addition, the sensor is equipped with a distance sensor when a movement is detected within a certain range. It relates to a technology that can be prevented.

However, the digestive system is to have a separate power source (battery) need checking normally supply if the power supply or there is a hassle to have to check the charge level of the battery does not have fire actual fire fighting made by its negligence When installing, there is a disadvantage that the actual user cannot install it immediately due to the need for various installation work for fixing to the switchboard and fixing.The large volume (volume) prevents the installation inside the small switchboard or is installed outside. After having a structure that can only insert a tube that can extinguish the extinguishing gas into the switchboard, there is a problem that a separate drilling operation is indispensable when inserting inside the tube.

Therefore, the present invention has been made to solve the above problems,

An enclosure case in which a power device provided to reduce and distribute a voltage of a special high pressure installed in a building, etc. is installed, and a door for opening and closing an interior space of the enclosure case, but primarily the enclosure case and an internal bus bar. A fire monitoring system including a temperature sensor for generating an alarm when a temperature is higher than a preset temperature is provided. Secondly, a fire extinguishing agent is diffused in the enclosure case when a fire occurs due to an abnormality or an unexpected cause of the fire monitoring system. The purpose of the present invention is to provide a switchgear assembly that is equipped with a diffused fire extinguisher to prevent fire occurrence and to provide initial suppression in case of fire.

It is also an object of the present invention to provide a switchgear assembly capable of extinguishing fire more effectively as the extinguishing agent used includes an extinguishing agent for blocking oxygen and a coolant for cooling heat of combustion.

Further, another object of the present invention is to provide a switchgear assembly capable of quickly and effectively extinguishing a fire by distributing the extinguishing agent into an aerosol form and distributing it evenly in an inner space, that is, a protective area.

In addition, further comprising a sensing unit including a temperature sensor for sensing the temperature of the internal space or busbar or both, and a communication module for transmitting the detected information to the administrator, the administrator can remotely check the status of the switchgear. It is an object of the present invention to provide a switchgear assembly.

In order to achieve the above object, the switchgear assembly according to the present invention is

An enclosure case having an inner space having a power device configured to reduce the introduced high pressure to a low pressure and to transmit the reduced high pressure;

To be provided in the housing case, is provided in the casing, the casing is connected to the sensed charge, the sensing unit for sensing a column are being extinguishing medium is built such that vaporized by the oxidizing agent including digestion housing which is provided on one side of the casing Diffuse fire extinguishers;

A sensing unit provided in the inner space, the sensing unit including a temperature sensor detecting a temperature of an inner space or a bus bar or both, and a communication module configured to send detected temperature information to a manager;

Characterized in that comprises a.

The switchgear assembly according to the present invention as described above

It is highly efficient, effective and environmentally friendly in fire extinguishing through an enclosure case having an internal space in which an internal device is provided with a power device for reducing the incoming high pressure to low pressure and sending it out.

In addition, the extinguishing agent dispersed in the diffusion type extinguisher has no equipment corrosion components, no human toxic substances, and is a solid compound, which has a high shelf life of 15 years or more and is very stable.

In particular, there is no need for a large amount of pipes and various parts or nozzles compared to the existing fire extinguishers, which are mainly used for gas fire extinguishing facilities, and it requires a low maintenance cost, which is almost negligible compared to other technologies, and since it is solid, there is no pressure at all. As it is a fire extinguisher, there is no risk of explosion, and no space or weight support is required, which saves considerable space in the installation.

1 is a perspective view and a conceptual view of a switchgear assembly according to the present invention;
2 is a perspective view of a diffuse fire extinguisher according to the present invention;
Figure 3 is an exploded perspective view of a diffusion type fire extinguisher according to the present invention
4 and 5 is a conceptual diagram of the sensing unit of the switchgear assembly according to the present invention
6 and 7 is a circuit diagram according to the type of switchgear according to the present invention
8 is a modification of the diffusion type fire extinguisher according to the present invention

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Since the present invention may be modified in various ways and have various forms, embodiments (or embodiments) will be described in detail in the text. However, this is not intended to limit the present invention to the specific form disclosed, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention.

In each of the drawings, the same reference numerals, in particular, the tens and ones digits, or the tens, ones and digits, refer to members having the same or similar functions, and unless otherwise specified, each member in the figures The member referred to by the reference numeral may be regarded as a member conforming to these criteria.

In addition, in the drawings, the components are exaggerated in size (or thick) in size (or thick) in size (or thin) or simplified in consideration of the convenience of understanding, but the protection scope of the present invention is limited in this way. It should not be.

The terminology used herein is for the purpose of describing particular embodiments (suns, aspects, and embodiments) (or embodiments) only and is not intended to be limiting of the invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms “comprises” or “consists” are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described on the specification, but one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in the commonly used dictionaries should be construed as having meanings consistent with the meanings in the context of the related art, and shall not be construed in ideal or excessively formal meanings unless expressly defined in this application. Do not.

First, the switchgear assembly A according to the present invention, as shown in FIG. 1, consists of an enclosure case 10 and a door 20 provided in the enclosure case 10.

First, the enclosure case 10 is formed with an internal space 11 in which various power devices 13 are provided, and the door 20 is provided in the enclosure case 10, and the internal space 11 is provided. It is designed to open and close the door.

In addition, the internal space 11 may include various components such as a power device 13 (transformer, rectifier, MOF, LBS, etc. necessary for decompression, power reception, and power transmission, which are configured in a conventional switchgear 13 The detailed description thereof will be omitted.), And the internal space 11 is provided with an intercoming cable, a power fuse, a load switch, and the like so that when an overvoltage flows, it can be cut off and generated in the power system. Alternatively, it is preferable to provide an arrester for reducing the peak value of the induced abnormal voltage.

In addition, the door 20 allows the operator to open the door 20 when an abnormality occurs in the process of operating the switchgear assembly (A) of the present invention.

Furthermore, the door 20 is further provided with a see-through window 21 to enable the operator to monitor the interior in real time, but is not an essential component, and thus the scope of rights should not be limitedly interpreted.

Such a configuration is similar to the configuration of a switchgear that is generally used, the appearance of the switchgear is generally made in the shape of a square, for each configuration and features, and to omit the drawings and the configuration,

The present invention further includes a diffusion type fire extinguisher 30 and a sensing unit 40 in the enclosure case 10, that is, the internal space 11, to prevent fire occurrence and to induce an initial suppression when a fire occurs. And a fire detection system.

Furthermore, the switchgear of the present invention can be used in a variety of switchgear, as shown in Figures 6 and 7, specifically used for high-pressure panel, low-pressure panel, motor control panel, distribution panel, solar panel connection panel, etc. As one embodiment of the present invention, the scope of rights should not be construed as limited thereto.

First, the diffusion type fire extinguisher 30 is provided in the enclosure case 10, as shown in Figure 2 and 3, when detecting a fire, made to diffuse the extinguishing agent 351, in a solid form The oxidant reacts and vaporizes the fire extinguishing agent 351, so that the extinguishing agent 351, that is, the fire extinguishing gas, fills the inside of the switchgear to block oxygen inside, and rapidly cools the heat to extinguish the fire.

The diffusion type fire extinguisher 30 will be described in more detail.

The diffusion type extinguisher 30 has a casing 31, a heat sensing line provided at the casing 31 to sense heat, and a extinguishing agent 351 is built in the casing 31 so as to be vaporized by an oxidant connected to the heat sensing line. (31) It comprises a fire extinguishing body 35 is provided on one side.

Each configuration will be described in more detail.

First, the casing 31 is for fixing the fire extinguishing body 35 and at the same time to attach the diffusion type fire extinguisher 30 more easily inside the switchgear,

An adhesive member 311 is provided on the rear surface of the casing 31 (the opposite surface on which the fire extinguishing body 35 is provided), so that the user can easily attach it to the inside of the switchboard.

A separate screw hole 313 is formed on the outer side of the casing 31, so that it can be screwed into the switchboard according to the situation.

A plurality of coupling holes 315 are formed in the casing 31, and the coupling holes 315 are for fixing the fire extinguishing body 35. Preferably, four coupling holes 315 are formed. It is configured to stably fix the fire extinguishing body (35).

That is, the clasp 353 is provided in the fire extinguishing body 35, and the fire extinguishing body 35 is fixed to the casing 31 as the clasp 353 is fitted into the coupling hole 315. It is configured to be.

In addition, the coupling hole 315 is provided in the protrusion protrusion 317 of the shape protruding to one surface of the casing 31, the fire extinguishing body (35) is fixed as the fire extinguishing body 35 is fixed on the protrusion (317) A space spaced between the casing 31 and the casing 31, that is, the diffusion part 319 is formed so that the extinguishing agent 351 contained in the fire extinguishing body 35 is vaporized and discharged through the diffusion part 319. do.

In addition, a heat sensing line, that is, a sensing unit 33 is further provided along the edge of the casing 31, and an end of the sensing unit 33 is connected to the junction 331 provided in the casing 31. And, the junction 331 is connected to the control unit 333 made of a primer provided in the digestive body 35, so that the control unit 333 can be detonated.

The control unit 333 is made of an oxidizing agent such as launching a rocket. When the control unit 333 operates, a solid extinguishing agent 351 provided around the device is oxidized to vaporize and diffuse.

The fire extinguishing enclosure 35 has a structure in which an accommodation space is formed, and the accommodation space is provided with a solid extinguishing agent 351 for extinguishing a fire.

First, the diffusion type fire extinguisher 30 is a self-powered type fire extinguisher 30 that does not require energy such as an external power source or a battery, and is installed in the switchgear so that it can be quickly extinguished when a fire occurs. Since the vaporized extinguishing agent 351 is discharged from the distribution panel immediately after extinguishing, the secondary damage of the electric appliances by the extinguishing agent 351 is minimized to protect the internal power device 13 and quickly restart.

In general, when the electrical load and resistance in the switchgear, the internal temperature rises, and when the diffusion type fire extinguisher 30 of the present invention, specifically the diffusion type fire extinguisher 30 is attached to the upper or side of the switchgear, the sensing unit ( 33) to detect the heat source, and to extinguish the fire extinguishing agent (351) to be able to suppress the initial fire.

The fire extinguishing body 35 is a non-pressurized iron container, and is provided with a extinguishing agent 351 in a solid form in a receiving part. When a fire is detected, the fire extinguishing body 35 is rapidly transformed into an effective and efficient extinguishing aerosol by a self-generating activation device. As they expand and disperse, they can extinguish the fire. This expansion and elasticity is transformed into the aerosol shape evenly distributed in the fire protection zone, that is, the inner space 11 of the switchgear, it is made of a structure that extinguish the fire by gas release without increasing the pressure in the fire protection zone. .

First of all, the extinguished gas suppresses the chemical chain reaction with oxygen blocking, effectively extinguishing fire, and the extinguishing agent 351 discharged from the aerosol stage is potassium carbonate (K₂CO₃), water vapor (H₂O), nitrogen (N₂), Consists of carbon dioxide (CO₂), solid particles of potassium carbonate (K₂CO₃), 10 microns in diameter, remain in the protective (inside switchboard) area for about an hour.

Looking at the configuration of the extinguishing agent (351),

First, the extinguishing agent 351 is composed of a extinguishing agent for blocking oxygen supply and a coolant for cooling combustion heat.

The extinguishing agent includes KNO ₃ , KClO ₄ , acetate oleic acid and carbon, acethenaglycerin, oleic acid, diamine diorrea lecithin, epoxide, unsaturated polyester resin,

The coolant comprises Mg (OH) ₂ , Na ₂ CO ₃ , H ₃ BO ₃ , KClO ₄ , KNO ₃ and CaCO ₄ components.

In addition, the diffusion type fire extinguisher 30 is further provided with a detector 33 for detecting a fire, that is, heat.

The sensing unit 33 has a length of 15 cm or more in a linear form and includes an initial body reacting at a high temperature of 170 degrees or more, charcoal, nitrogen oxide, potassium nitrate, sulfur, rubber, softener, diatomaceous earth, nitroglycerin and It consists of an external coating agent to keep it in a linear form.

In addition, the ignition agent included in the control unit 333 is composed of a material of ammonium nitrate, potassium nitrate, charcoal, and nitrogen oxides.

Furthermore, the present invention is configured to prevent or detect a fire through the sensing units 40 and 50 including separate temperature sensors 43 and 51, see FIG. 4 and FIG. 5.

The temperature rise is accompanied before the fire of the switchboard, and when the temperature sensor (43) (51) detects the temperature and reaches the preset temperature, it sends this information, that is, a warning signal to the administrator's mobile device, server, etc. In addition, the communication module 41, 52 is further provided for this transmission, the temperature sensor 51 is attached to the connection portion of the bus bar occupying a large part of the causes of the fire, the connection of the bus bar It is desirable to be able to detect the overheat caused by the failure in advance.

Specifically, the temperature sensors 43 and 51 may include a first temperature sensor 43 for sensing a temperature inside the switchboard, and a second temperature sensor 51 provided in the busbar to detect a fire in advance. In addition, it is preferable that separate communication units 45 and 52 are provided for controlling the signals of the first temperature sensor 43 and the second temperature sensor 51, respectively. More preferably, a separate control unit 45 or 52 for controlling the signals of the temperature sensors 43 and 51 is further provided.

Again, the present invention is further provided with a communication module 41, 52, so that the temperature information can be sent to the administrator, in the normal state to deactivate the communication module (41) (52) to minimize the operation of the battery And it performs only temperature monitoring, and when the set temperature is reached by activating the communication module 41, 52 transmits the abnormal state to the server of the center through the wireless (WIFI). The delivered abnormal status is alerted to the administrator's mobile phone through the server program.

The sensor that monitors the temperature of the busbars is a battery-free non-powered sensor (RFID) and includes a circuit capable of generating electrical energy by receiving radio waves in the 900 MHz band. Powered RFID readers regularly read the temperature of the busbars and transmit them to the server in the center via wireless (WIFI) when abnormalities occur. The abnormal status is delivered to the administrator's mobile phone through the server program.

8 shows a modification of the diffusion fire extinguisher 30,

The diffusion type fire extinguisher 30 is a one-time product, and after extinguishing the fire, it must be replaced with a new type of fire extinguisher 30, but for easier replacement, the fire extinguisher 35 is easily provided from the casing 31. It relates to a deformed clasp unit 40 designed to replace the.

More specifically, as the clasp 353 provided in the fire extinguishing body 35 is deformed, the clasp 353 of the deformable clasp unit 40 is formed of a leg 41 and a catching part 43. However, the leg portion 41 and the engaging portion 43 is configured to be hinged by the hinge portion 45 to each other.

At this time, the hinge portion 45 is formed on the outside (right side relative to FIG. 8) of the locking portion 43, and a separate leaf spring 451 is further formed on the outside of the hinge portion 45. It is provided, to prevent the engaging portion 43 is hinged from the leg portion 41 arbitrarily.

Therefore, as shown in the figure, when the fixed to the casing 31 by the leaf spring 451, the catching portion 43 supports the lower portion of the casing 31 to separate the fire extinguishing body 35 Prevent,

When the fire extinguishing body 35 is separated from the casing 31, the lower portion of the casing 31 pushes the catching portion 43 as shown in the drawing, and the leaf spring 451 is bent at this time. As the hinge portion 45 is opened between the leg portion 41 and the locking portion 43, the fire extinguishing body 35 can be easily separated.

Furthermore, when only the leaf spring 451 is used to fix the fire extinguishing body 35, the support force may be weakened, and the present invention compensates for this through a separate fixing unit 50.

First, the leg portion 41 is formed with a line hole 51 formed in an oblique direction from the inside of the leg portion 41, the end portion of the line 53 is fixed to the upper end of the engaging portion 43.

That is, the end portion of the line 53 is fixed to the engaging portion 43 and has a structure that extends upward along the leg portion 41 through the line hole 51.

That is, when the tension of the line 53 is maintained, the leg portion 41 and the locking portion 43 can be prevented from being arbitrarily opened. When the tension is extinguished, the leg portion 41 and the locking portion ( By making it possible to open 43 by the hinge part 45, the fixing force is improved.

Furthermore, in order to fix another end of the line 53, a ring holder 55 is provided on the outer surface of the fire extinguishing body 35.

The ring holder 55 is provided spaced apart from the lower end of the fire extinguishing body 35 by a predetermined distance, preferably made of an iron material that can be fixed to the magnet by a magnetic force.

That is, the line holder 55 is fixed to the ring holder 55 so as to maintain the tension of the line 53, which is provided at each of the plurality of catching portions 43, and the ring holder 55 has a fire extinguishing body 35. ), The tension of the line 53 can be released.

In order to fix the ring holder 55 to be spaced apart from the lower portion of the fire extinguishing body 35 by a predetermined distance, the magnet ring 57 is fixedly coupled to the outer surface of the fire extinguishing body 35 at a corresponding position. ,

The magnet ring 57 is made of a strong magnetic neodymium material can be firmly fixed to the ring holder 55 by a magnetic force.

Therefore, when the tension of the line 53 is to be released to replace the fire extinguishing body 35, the worker separates the ring holder 55 from the magnet ring 57 to extinguish the ring holder 55. After moving downwards and moving, by applying a force to the fire extinguishing body 35, the catching portion 43 and the leg 41 are open to each other to easily separate the fire extinguishing body 35.

In addition, when the new fire extinguishing body 35 is coupled, it can be easily fitted by the inclined portion 431 formed in the locking portion 43, thereby improving the convenience of replacement.

In addition, in the above description of the present invention with reference to the accompanying drawings, a switchgear assembly having a specific shape, structure and configuration mainly described, but the present invention is capable of various modifications, changes and substitutions by those skilled in the art, such modifications, changes and Substitutions should be construed as falling within the protection scope of the present invention.

A: switchgear assembly 10: enclosure case
20 door 30 diffusion extinguisher
40: detection unit

Claims (4)

An enclosure case 10 having an inner space 11 having a power device 13 for reducing the introduced high pressure to low pressure and transmitting the reduced high pressure;
It is provided in the enclosure case 10, the casing 31, the heat sensing line provided in the casing 31 to sense heat, and the fire extinguishing agent is built so as to be connected to the heat sensing line and vaporized by an oxidizing agent (31) a diffusion type fire extinguisher (30) comprising a fire extinguishing body (35) provided on one surface;
A sensing unit provided in the inner space 11 and including a temperature sensor detecting a temperature of an inner space or a bus bar or both, and a communication module for transmitting the sensed temperature information to a manager;
Including but not limited to,
The fire extinguishing body 35 is fixed to the casing by a deformable clasp unit 40 detachably,
The deformed clasp unit 40 is
A clasp portion 353 formed of a leg portion 41 provided on the fire extinguishing body 35 and a catching portion 43 hinged to the leg portion 41 through a hinge portion 45;
It comprises a leaf spring 451 provided in the hinge portion 45,
The line hole 51 provided in the leg portion 41, the ring holder 55 provided on the outer surface of the fire extinguishing body 35, and the locking portion 43 are fixed and pass through the line hole 51. A line 53 fixed to the ring holder 55, and a magnet ring 57 spaced apart from a lower portion of the fire extinguishing body 35 in a direction upwardly fixed to fix the ring holder 55. The fixing unit 50 is further provided,
When the ring holder 55 is moved to the lower side of the fire extinguishing body 35, the switch unit assembly is characterized in that the engaging portion 43 and the leg 41 is opened to separate the fire extinguishing body from the casing. . The method of claim 1,
The extinguishing agent of the diffuse digester 30
With extinguishing agents that block oxygen to extinguish fire
A switchgear assembly comprising a coolant for cooling fire combustion heat. The method of claim 1,
The diffuse digester
When the fire is detected, the switchgear assembly characterized in that the extinguishing agent is transformed into aerosol and dispersed to suppress the fire. The method according to any one of claims 1 to 3,
The temperature sensor of the detection unit
A switchgear assembly comprising a first temperature sensor (43) provided adjacent to the diffusion type fire extinguisher and a second temperature sensor (51) attached to a connection portion of a bus bar provided in an inner space.

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