CN218678065U - Relay protection cabinet - Google Patents

Abstract

The disclosure relates to a relay protection cabinet, which comprises a cabinet body, wherein a containing cavity is formed inside the cabinet body, and a relay, a current transformer and a circuit breaker are arranged in the containing cavity; the circuit breaker is used for being connected with a multi-phase alternating current power supply; the secondary terminal of the current transformer is electrically connected with the relay, and the sensing end of the current transformer is used for sensing the current passing through the circuit breaker and outputting a current sensing signal to the relay through the secondary terminal; the relay is linked with the circuit breaker, and the relay is used for triggering the circuit breaker to be closed or opened when receiving the current induction signal. The relay protection cabinet disclosed is favorable to improving the starting sensitivity of the tripper of the circuit breaker, can be suitable for the scene that the overload current of the electric equipment and the matching degree of the circuit breaker are not high, so that the tripper can be immediately started when the current in the circuit reaches the overload current of the electric equipment, and the safety of the relay protection cabinet is favorably improved.

Description

Relay protection cabinet

Technical Field

The disclosure relates to the technical field of relay protection cabinet design, in particular to a relay protection cabinet.

Background

The relay protection cabinet is a device for detecting faults or abnormal conditions in an electric power system and related devices (including a power plant, a hydropower station, a power grid, a transformer substation, electrical equipment and the like), and the relay protection cabinet can send out an alarm signal after detecting the faults or the abnormal conditions, or directly isolate and cut off the fault part. At present, the on-off of the circuit of the whole relay protection cabinet is generally controlled by a circuit breaker arranged inside the relay protection cabinet. The circuit breaker is used for identifying whether a release needs to be started or not by identifying the magnitude of current flowing through the circuit breaker, so that tripping is realized.

However, since circuit breakers are mass produced, the magnitude of the current that activates the trip unit is generally established. When the circuit breaker is used on site, various electric equipment can be mixed and matched for use, so that the matching degree of overload current of the electric equipment and the circuit breaker is not high, and the sensitivity of the existing circuit breaker is not enough to meet the requirement.

SUMMERY OF THE UTILITY MODEL

The purpose of this disclosure is to provide a relay protection cabinet for solve the technical problem that exists among the correlation technique.

In order to achieve the purpose, the disclosure provides a relay protection cabinet, which comprises a cabinet body, wherein an accommodating cavity is formed inside the cabinet body, and a relay, a current transformer and a circuit breaker are arranged in the accommodating cavity;

the circuit breaker is used for being connected with a multiphase alternating current power supply;

the secondary terminal of the current transformer is electrically connected with the relay, and the sensing end of the current transformer is used for sensing the current passing through the circuit breaker and outputting a current sensing signal to the relay through the secondary terminal;

the relay is linked with the circuit breaker, and the relay is used for triggering the circuit breaker to be closed or opened when receiving the current induction signal.

Optionally, the relay protection cabinet still includes image acquisition device, the cabinet body is including relative first lateral wall and the second lateral wall that sets up, the relay current transformer the circuit breaker all is close to first lateral wall sets up, image acquisition device is close to the second lateral wall sets up, so that image acquisition device's collection region can cover relay, current transformer and circuit breaker, in order to gather the image information of relay, current transformer and circuit breaker.

Optionally, the cabinet body further has a third side wall and a fourth side wall located between the first side wall and the second side wall, the third side wall and the fourth side wall are arranged oppositely, and an air inlet and an air outlet are formed on both the third side wall and the fourth side wall;

the relay protection cabinet further comprises a heat dissipation device, the heat dissipation device comprises a partition plate, a motor and a fan, the partition plate is arranged in the containing cavity and divides the containing cavity into a first cavity and a second cavity, the first cavity is located below the second cavity, the motor is arranged in the first cavity, the fan is arranged in the second cavity, and an output shaft of the motor penetrates through a through hole in the partition plate to be connected with the fan;

the relay, current transformer, circuit breaker and image acquisition device all set up in the second cavity, the air intake with the air outlet all with the second cavity intercommunication, just the air intake is located the below of air outlet.

Optionally, the number of the fans is multiple, the multiple fans are arranged at intervals in the direction from the third side wall to the fourth side wall, and each fan is connected with one of the motors.

Optionally, the air inlet department is provided with dustproof cotton, air outlet department is provided with the gauze.

Optionally, the heat dissipation device further comprises a protective cover, the protective cover is arranged in the second cavity, one side of the protective cover is connected with the partition plate, a plurality of ventilation holes are formed in the other side of the protective cover, and the fan is arranged in the protective cover.

Optionally, the relay protection cabinet still includes row rain device, row rain device includes rain collecting groove and drain pipe, rain collecting groove sets up the top of the cabinet body, just the upper end in rain collecting groove is open, the drain pipe with rain collecting groove intercommunication, and follow rain collecting groove extends towards ground.

Optionally, the rain gutter is formed into a trapezoidal platform structure with a large upper end and a small lower end, and the projection of the cabinet body in the vertical direction is located in the projection of the rain gutter in the vertical direction.

Optionally, the rain drainage device further comprises a fixing member, the drain pipe is attached to the cabinet body, and the fixing member is used for fixing the drain pipe on the cabinet body.

Optionally, the relay protection cabinet further includes a base, the cabinet body is installed on the base, and the projection of the cabinet body in the vertical direction is located in the projection of the base in the vertical direction.

Through above-mentioned technical scheme, when the electric current through the circuit breaker is less than consumer's overcurrent, circuit breaker and relay do not all produce the effect, and the circuit keeps the connected state. When the current passing through the circuit breaker is equal to or greater than the overload current of the electric equipment but less than the tripping device starting current of the circuit breaker, the current transformer outputs a current induction signal to the relay through the secondary terminal, so that the circuit breaker triggers the tripping device, namely, the current transformer is linked with the circuit breaker, and when the relay receives the current induction signal from the current transformer, the triggering tripping device is started, namely, the circuit is disconnected. When the current through the circuit breaker is equal to or greater than the trip activation current of the circuit breaker, the trip in the circuit breaker activates, causing the circuit to open.

So, this disclosed technical scheme is favorable to improving the start sensitivity of the tripper of circuit breaker, can be applicable to the overload current of consumer and the not high scene of circuit breaker matching degree for the circuit breaker can start the tripper immediately when the current in the circuit reaches the overload current of consumer, so that the circuit disconnection, protection circuit and consumer are favorable to promoting the security of relay protection cabinet, reduce the loss that causes because of circuit fault.

Additional features and advantages of the disclosure will be set forth in the detailed description which follows.

Drawings

The accompanying drawings, which are included to provide a further understanding of the disclosure and are incorporated in and constitute a part of this specification, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure without limiting the disclosure. In the drawings:

fig. 1 is a schematic structural diagram of a relay protection cabinet according to an exemplary embodiment of the present disclosure;

fig. 2 is a front view of a relay protection cabinet provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic perspective structure diagram of a relay protection cabinet according to an exemplary embodiment of the present disclosure;

fig. 4 is a schematic structural view of a separator provided in an exemplary embodiment of the present disclosure.

Description of the reference numerals

100-relay protection cabinet; 1-a cabinet body; 11-a containment chamber; 111-a first cavity; 112-a second cavity; 12-a first side wall; 13-a second side wall; 14-a third side wall; 15-a fourth side wall; 21-a relay; 22-a current transformer; 23-a circuit breaker; 3-an image acquisition device; 41-smoke alarm; 42-temperature alarm; 51-an air inlet; 52-air outlet; 61-a separator; 611-through holes; 62-a motor; 63-a fan; 64-a shield; 641-vent holes; 71-rain collecting groove; 72-a drain pipe; 73-a fixture; 8-base.

Detailed Description

The following detailed description of specific embodiments of the present disclosure is provided in connection with the accompanying drawings. It should be understood that the detailed description and specific examples, while indicating the present disclosure, are given by way of illustration and explanation only, not limitation.

In the present disclosure, unless otherwise stated, the use of directional words such as "up and down" refers to the up and down defined in the use state of the relay protection cabinet of the present disclosure. Use of directional words such as "inner and outer" refers to the inner and outer of the contours of a particular structure. Terms such as "first," "second," "third," and "fourth" are used merely to distinguish one element from another, and are not sequential or significant. Additionally, the use of the directional terms above are merely intended to simplify the description of the present disclosure, and do not indicate or imply that the referenced device or element must have a particular orientation, configuration, and operation in a particular orientation, and should not be taken as limiting the present disclosure.

As shown in fig. 1 to 4, the present disclosure provides a relay protection cabinet 100, including a cabinet body 1, a containing cavity 11 is formed inside the cabinet body 1, and a relay 21, a current transformer 22, and a circuit breaker 23 are arranged in the containing cavity 11; the circuit breaker 23 is used for connecting with a multiphase alternating current power supply; a secondary terminal of the current transformer 22 is electrically connected with the relay 21, and an induction end of the current transformer 22 is used for inducing the current passing through the circuit breaker 23 and outputting a current induction signal to the relay 21 through the secondary terminal; the relay 21 is linked with the circuit breaker 23, and the relay 21 is used for triggering the circuit breaker 23 to be closed or opened when receiving the current induction signal.

Through the technical scheme, when the current passing through the circuit breaker 23 is smaller than the overload current of the electric equipment, the circuit breaker 23 and the relay 21 do not act, and the circuit keeps a connected state. When the current passing through the circuit breaker 23 is equal to or greater than the overload current of the electric device but less than the trip activation current of the circuit breaker 23, the current transformer 22 outputs a current induction signal to the relay 21 through the secondary terminal, so that the circuit breaker 23 activates the trip, that is, the current transformer 22 is linked with the circuit breaker 23, and when the relay 21 receives the current induction signal from the current transformer 22, the trip is activated, that is, the circuit is disconnected. When the current through the circuit breaker 23 is equal to or greater than the trip activation current of the circuit breaker 23, the trip in the circuit breaker 23 is activated, causing the circuit to open.

So, this disclosed technical scheme is favorable to improving the start sensitivity of the tripper of circuit breaker 23, can be applicable to the overload current of consumer and the not high scene of circuit breaker 23 matching degree for circuit breaker 23 can start the tripper immediately when the current in the circuit reaches the overload current of consumer, so that the circuit breaks off, and protection circuit and consumer are favorable to promoting the security of relay protection cabinet, reduce the loss that causes because of circuit fault.

In the related art, after some relay protection electronic devices are started to a protection state (for example, after a release of a circuit breaker is started), an operator cannot directly observe the conditions inside the relay protection cabinet from the outside of the relay protection cabinet, and thus cannot accurately and quickly judge the specific type of the relay protection electronic device in the protection state. At this time, the cabinet body needs to be opened manually by an operator and then observed. However, if certain dangerous situations (such as smoke, sparks, flame and the like) exist in the relay protection cabinet, the direct opening of the cabinet body has certain dangerousness (the smoke easily burns the skin of an operator, and respiratory diseases can be caused by the accidental inhalation.

In view of this, in an exemplary embodiment of the present disclosure, as shown in fig. 1, the relay protection cabinet 100 of the present disclosure further includes an image capturing device 3, the cabinet body 1 includes a first side wall 12 and a second side wall 13 which are oppositely disposed, the relay 21, the current transformer 22, and the circuit breaker 23 are disposed near the first side wall 12, and the image capturing device 3 is disposed near the second side wall 13, so that a capturing area of the image capturing device 3 can cover the relay 21, the current transformer 22, and the circuit breaker 23 to capture image information of the relay 21, the current transformer 22, and the circuit breaker 23.

So, set up the inside condition of relay protection cabinet 100 in relay protection cabinet 100 can be discerned effectively to image acquisition device 3 inside relay protection cabinet 100, in particular, to the relay protection electron device (for example, relay 21, circuit breaker 23 and current transformer 22) in the internal portion of cabinet, operating personnel can be long-range in real time and directly observe the operating condition of relay 21, circuit breaker 23 and current transformer 22, need not the manual work and open cabinet body 1, just also can avoid operating personnel directly open the cabinet and the danger that produces under the condition of not knowing relay protection cabinet 100 inside, thereby also can to a certain extent, further promote relay protection cabinet 100's security.

It is understood that the image capturing device 3 of the present disclosure has various options, for example, a digital camera, an analog camera, or the like, and the present disclosure is not particularly limited to the type of the image capturing device 3 as long as it can capture real-time images of the relay 21, the circuit breaker 23, and the current transformer 22.

In order to further enhance the safety of the relay protection cabinet 100, in an embodiment of the present disclosure, as shown in fig. 1, the relay protection cabinet 100 further includes a smoke alarm 41 and a temperature alarm 42 disposed in the accommodating cavity 11, and the smoke alarm 41, the temperature alarm 42 and the image capturing device 3 are all mounted on the top wall of the cabinet 1.

In this manner, the smoke alarm 41 is set to alarm by recognizing the smoke concentration inside the relay protection cabinet 100, and the temperature alarm 42 is set to alarm by recognizing the temperature value inside the relay protection cabinet 100. The smoke alarm 41 and the temperature alarm 42 can prompt the smoke concentration and the temperature condition inside the relay protection cabinet 100 for the operator, so that the relay protection cabinet 100 is prevented from being opened blindly when the smoke concentration and the temperature condition inside the relay protection cabinet 100 are not clear, risks such as smoke poisoning and high-temperature scalding caused by blindly opening the relay protection cabinet are avoided, and the safety of the relay protection cabinet 100 can be improved.

It will be understood that the alarm concentration threshold of the smoke alarm 41 and the alarm temperature value of the temperature alarm 42 of the present disclosure may be selected according to actual needs, and the present disclosure is not limited thereto.

In an exemplary embodiment of the present disclosure, as shown in fig. 1 to 3, the cabinet 1 of the present disclosure may further have a third sidewall 14 and a fourth sidewall 15 located between the first sidewall 12 and the second sidewall 13, the third sidewall 14 and the fourth sidewall 15 are disposed opposite to each other, and the third sidewall 14 and the fourth sidewall 15 are both formed with an air inlet 51 and an air outlet 52; the relay protection cabinet 100 further comprises a heat dissipation device, the heat dissipation device comprises a partition plate 61, a motor 62 and a fan 63, the partition plate 61 is arranged in the accommodating cavity 11 and divides the accommodating cavity 11 into a first cavity 111 and a second cavity 112, the first cavity 111 is positioned below the second cavity 112, the motor 62 is arranged in the first cavity 111, the fan 63 is arranged in the second cavity 112, and an output shaft of the motor 62 penetrates through a through hole 611 on the partition plate 61 to be connected with the fan 63; the relay 21, the current transformer 22, the circuit breaker 23 and the image acquisition device 3 are all disposed in the second cavity 112, the air inlet 51 and the air outlet 52 are both communicated with the second cavity 112, and the air inlet 51 is located below the air outlet 52.

Therefore, the relay protection cabinet 100 of the present disclosure may also perform internal air conditioning, and on one hand, the heat dissipation device may be used to provide a forced convection power for the air inside the relay protection cabinet 100, so that the internal air continuously exchanges current with the external environment, so as to achieve an effect of adjusting the temperature inside the relay protection cabinet 100; on the other hand, because the temperature inside the relay protection cabinet 100 is adjusted by adopting a forced convection mode, once a dangerous combustion situation occurs inside the relay protection cabinet 100, smoke generated by combustion can flow out of the cabinet body 1 along with air, so that not only can a warning effect be achieved, but also the smoke concentration inside the relay protection cabinet 100 can be reduced, an image acquisition device 3 is facilitated to acquire real-time images inside the cabinet body 1, further, an operator can quickly master the condition inside the cabinet body 1, and the operator can quickly select disposal measures.

And, the baffle 61 that sets up will hold the chamber 11 and separate for first cavity 111 and second cavity 112, and motor 62 sets up in first cavity 111 alone, and relay 21, current transformer 22, circuit breaker 23 and image acquisition device 3 all set up in second cavity 112, and equipment or device in two cavities break down or after the abnormal conditions, can not produce mutual influence, and then just be favorable to avoiding causing chain dangerous situation, be favorable to promoting the security of this disclosed relay protection cabinet 100.

In an exemplary embodiment of the present disclosure, as shown in fig. 1, the fan 63 of the present disclosure may be plural (although only 2 fans 63 are shown in fig. 1 of the present disclosure, it is understood that the present disclosure may provide the number of fans 63 as plural), the plural fans 63 are spaced apart in a direction from the third side wall 14 to the fourth side wall 15, and one motor 62 is connected to each fan 63. Therefore, on one hand, the form of the fans 63 can provide a plurality of airflow power sources for the air flow in the cabinet 1, so that a plurality of airflow channels can be formed, and the influence of the phenomenon that some structures or equipment in the cabinet 1 block part of the airflow channels on the airflow in the whole cabinet 1 can be reduced; on the other hand, the plurality of fans 63 can provide a larger airflow force, and both the temperature control effect and the smoke evacuation effect can be ensured.

In an exemplary embodiment of the present disclosure, as shown in fig. 1 and 3, dust-proof cotton may be disposed at the air inlet 51 and a gauze may be disposed at the air outlet 52. The dustproof cotton arranged at the air inlet 51 can play a role in filtering air, so that external dust or fine sundries are prevented from entering the cabinet body 1 through the air inlet 51, and normal operation of related equipment or facilities inside the cabinet body 1 is influenced. The gauze arranged at the air outlet 52 can prevent external leaves, small stones or insects and other small objects from entering the cabinet body 1 through the air outlet 52, so that the normal operation of related equipment or facilities inside the cabinet body 1 is influenced. The dustproof cotton and the gauze that this disclosure set up can also prevent that external foreign matter from getting into the cabinet body 1 on guaranteeing the basis that supplies the air normal flow, are favorable to promoting the security of this disclosed relay protection cabinet 100.

In order to further improve the safety of the relay protection cabinet 100 of the present disclosure, in an exemplary embodiment of the present disclosure, as shown in fig. 1, the heat dissipation device of the present disclosure may further include a protective cover 64, the protective cover 64 is disposed in the second cavity 112, one side of the protective cover 64 is connected to the partition 61, the other side of the protective cover 64 is opened with a plurality of ventilation holes 641, and the fan 63 is disposed in the protective cover 64.

In this way, the protective cover 64 covers the fan 63, so that the direct collision with the fan 63 after the structure such as the electric wire and the equipment part in the cabinet body 1 falls off accidentally can be avoided, the problem that the blades of the fan 63 are damaged or the fan 63 flies some equipment parts to break through, damage the cabinet body 1 or break down and damage other equipment or facilities is avoided, and the safety of the relay protection cabinet 100 disclosed by the present disclosure is further improved.

To further enhance the safety of the relay protection cabinet 100, in an exemplary embodiment of the present disclosure, as shown in fig. 1 to 3, the relay protection cabinet 100 of the present disclosure may further include a rain discharging device, the rain discharging device includes a rain collecting groove 71 and a drain pipe 72, the rain collecting groove 71 is disposed at the top of the cabinet body 1, an upper end of the rain collecting groove 71 is open, and the drain pipe 72 is communicated with the rain collecting groove 71 and extends from the rain collecting groove 71 toward the ground. So, rain discharging device can collect the rainwater that falls in cabinet body 1 top region and arrange by drain pipe 72 from cabinet body 1, can avoid the regional rainwater of cabinet body 1 top along cabinet body 1 side landing (the rainwater along the side landing may produce the erosion effect to cabinet body 1 side), and then is favorable to strengthening the rain-proof water erosion ability of cabinet body 1 side to just can further strengthen relay protection cabinet 100's security.

The rain gutter 71 of the present disclosure has various embodiments, for example, in an exemplary embodiment, as shown in fig. 1 to 3, the rain gutter 71 of the present disclosure may be formed in a trapezoidal table structure having a large upper end and a small lower end, and a projection of the cabinet 1 in the vertical direction is located within a projection of the rain gutter 71 in the vertical direction. Like this, this rain gutter 71 of this disclosure not only can collect the regional rainwater in cabinet 1 top, can also collect the regional rainwater around the cabinet 1 top, can avoid these rainwater to follow the side landing of the cabinet 1 on the one hand, strengthens the rain-proof water erosion capacity of the cabinet 1 side, and on the other hand can also avoid the rainwater to fall into air outlet 52 or air intake 51 (that is to say, can avoid the rainwater to get into the cabinet 1 inside through air outlet 52 or air intake 51), is favorable to promoting the rain-proof water invasion capacity of this disclosed relay protection cabinet 100.

In another embodiment, the rain gutter 71 may be directly formed in a hollow cubic structure with one open end, which is disposed at the top of the cabinet 1, and may also serve to collect rain water in the top region of the cabinet 1.

In an embodiment of the present disclosure, as shown in fig. 1 to 3, the rain drainage device of the present disclosure may further include a fixing member 73, the drain pipe 72 is disposed to be attached to the cabinet 1, and the fixing member 73 is used to fix the drain pipe 72 to the cabinet 1. The fixing member 73 may firmly fix the drain pipe 72 at the side of the cabinet 1 to prevent the external environmental factors (such as strong wind, fallen branches, etc.) from changing the position of the drain pipe 72. The provision of the fixture 73 facilitates the continuous and efficient draining of the drain pipe 72 at the installation location.

In order to avoid ground moisture erosion, in an exemplary embodiment of the present disclosure, as shown in fig. 1 to 3, the relay protection cabinet 100 of the present disclosure may further include a base 8, the cabinet 1 is mounted on the base 8, and a projection of the cabinet 1 in the vertical direction is located within a projection of the base 8 in the vertical direction. Thus, the base 8 can block most of water vapor from the ground, and the water vapor on the ground is prevented from corroding the bottom of the cabinet body 1.

It is understood that the base 8 of the present disclosure has various configurations, for example, a concrete base 8 may be adopted, that is, a concrete is poured on the corresponding base 8 before the relay protection cabinet 100 is installed. Alternatively, a base 8 made of plastic or a corrosion resistant material may be used.

The preferred embodiments of the present disclosure are described in detail with reference to the accompanying drawings, however, the present disclosure is not limited to the specific details of the above embodiments, and various simple modifications may be made to the technical solution of the present disclosure within the technical idea of the present disclosure, and these simple modifications all belong to the protection scope of the present disclosure.

It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various combinations that are possible in the present disclosure are not described again.

In addition, any combination of various embodiments of the present disclosure may be made, and the same should be considered as the disclosure of the present disclosure, as long as it does not depart from the spirit of the present disclosure.

Claims (10)

1. A relay protection cabinet is characterized by comprising a cabinet body, wherein a containing cavity is formed in the cabinet body, and a relay, a current transformer and a circuit breaker are arranged in the containing cavity;

the circuit breaker is used for being connected with a multi-phase alternating current power supply;

the secondary terminal of the current transformer is electrically connected with the relay, and the sensing end of the current transformer is used for sensing the current passing through the circuit breaker and outputting a current sensing signal to the relay through the secondary terminal;

the relay is linked with the circuit breaker, and the relay is used for triggering the circuit breaker to be closed or opened when receiving the current induction signal.

2. The relay protection cabinet according to claim 1, wherein the relay protection cabinet further comprises an image acquisition device, the cabinet body comprises a first side wall and a second side wall which are oppositely arranged, the relay, the current transformer and the circuit breaker are arranged close to the first side wall, and the image acquisition device is arranged close to the second side wall, so that an acquisition area of the image acquisition device can cover the relay, the current transformer and the circuit breaker to acquire image information of the relay, the current transformer and the circuit breaker.

3. The relay protection cabinet according to claim 2, further comprising a smoke alarm and a temperature alarm disposed in the accommodating chamber, wherein the smoke alarm, the temperature alarm and the image capturing device are all mounted on a top wall of the cabinet body.

4. The relay protection cabinet according to claim 2, wherein the cabinet body further has a third sidewall and a fourth sidewall between the first sidewall and the second sidewall, the third sidewall and the fourth sidewall are disposed opposite to each other, and an air inlet and an air outlet are formed on each of the third sidewall and the fourth sidewall;

the relay protection cabinet further comprises a heat dissipation device, the heat dissipation device comprises a partition plate, a motor and a fan, the partition plate is arranged in the accommodating cavity and divides the accommodating cavity into a first cavity and a second cavity, the first cavity is located below the second cavity, the motor is arranged in the first cavity, the fan is arranged in the second cavity, and an output shaft of the motor penetrates through a through hole in the partition plate to be connected with the fan;

the relay, current transformer, circuit breaker and image acquisition device all set up in the second cavity, the air intake with the air outlet all with the second cavity intercommunication, just the air intake is located the below of air outlet.

5. The relay protection cabinet according to claim 4, wherein said fans are plural, and said plural fans are disposed at intervals in a direction from said third side wall to said fourth side wall, and each of said fans is connected to one of said motors.

6. The relay protection cabinet according to claim 4, wherein the air inlet is provided with dust cotton, and the air outlet is provided with a gauze.

7. The relay protection cabinet according to claim 4, wherein the heat dissipation device further comprises a shield, the shield is disposed in the second chamber, one side of the shield is connected to the partition, the other side of the shield is provided with a plurality of ventilation holes, and the fan is disposed in the shield.

8. The relay protection cabinet according to any one of claims 1 to 7, further comprising a rain drainage device, wherein the rain drainage device comprises a rain collection tank and a drain pipe, the rain collection tank is disposed at the top of the cabinet body, an upper end of the rain collection tank is open, and the drain pipe is communicated with the rain collection tank and extends from the rain collection tank toward the ground.

9. The relay protection cabinet according to claim 8, wherein the rain gutter is formed in a trapezoidal structure with a large upper end and a small lower end, and a projection of the cabinet body in a vertical direction is located within a projection of the rain gutter in the vertical direction.

10. The relay protection cabinet according to any one of claims 1-7, further comprising a base, wherein the cabinet body is mounted on the base, and a projection of the cabinet body in a vertical direction is located within a projection of the base in the vertical direction.

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