CN219643576U - Protective structure of relay protection device - Google Patents

Abstract

The utility model relates to the technical field of power-off protection, in particular to a protection structure of a relay protection device. The protective structure of the relay protection device comprises a protective shell, a mounting seat and a connecting assembly, wherein a mounting cavity is formed in the protective shell, an outlet and an inlet which are opposite are formed in the protective shell, the outlet and the inlet are communicated with the mounting cavity, the mounting seat is arranged in the mounting cavity, and a mounting groove is formed in the mounting seat; the connecting assembly is connected with the mounting seat so as to fix the relay and the air switch which are mutually connected in the mounting cavity. Thus preventing dust accumulation and realizing protection of the relay protection device. And with the instruction subassembly setting on protective housing, the instruction subassembly is when the outage is cut off in the sky, sends the outage and reminds the instruction to the effectual quick staff's of reminding trouble condition.

Description

Protective structure of relay protection device

Technical Field

The utility model relates to the technical field of power-off protection, in particular to a protection structure of a relay protection device.

Background

Relay protection is an important measure for detecting faults or abnormal conditions occurring in a power system and then isolating or cutting off fault parts. The equipment for realizing the relay protection function is called a relay protection device. A relay protection device in a traction substation (such as an opening and closing station or a partition pavilion) is started by short-circuit current generated by an accident, and a breaker (such as an air switch) for supplying power to the accident point is automatically disconnected, so that the accident range is reduced, and the safe operation of other equipment and the normal power supply to a non-accident line are ensured.

Relay protection device in the prior art includes relay and air switch (can be called empty switch), and relay and air switch are direct to install the use with the circuit, and relay and air switch accumulate the dust easily, lead to the performance of relay and air switch to receive the influence.

Disclosure of Invention

In order to solve the problems in the prior art, the utility model provides a protection structure of a relay protection device.

The protection structure of the relay protection device provided by the utility model comprises the following components: the protective shell is internally provided with a mounting cavity, the protective shell is provided with an outlet and an inlet which are opposite to each other, the outlet and the inlet are communicated with the mounting cavity, the mounting seat is arranged in the mounting cavity, and the mounting seat is provided with a mounting groove; the connecting component is connected with the mounting seat so as to fix the relay and the air switch which are mutually connected in the mounting cavity; the indicating assembly is arranged on the protective shell and sends out a power-off reminding indication when the indicating assembly is in the open state and the power-off state.

In a possible implementation manner, the protection structure of the relay protection device provided by the utility model comprises a connecting component and a connecting frame, wherein a first mounting hole is formed in a mounting seat, and the connecting component is connected with the first mounting hole through the connecting frame; the connecting frame is used for installing a relay and opening.

In one possible implementation manner, the protective structure connecting frame of the relay protection device provided by the utility model comprises a guide rail and two connecting plates, wherein the two connecting plates are connected through the guide rail; the two connecting plates are respectively positioned at two sides of the mounting groove, and the guide rail part covers the notch of the mounting groove; the relay and the air switch are both spliced with the guide rail.

In a possible implementation manner, in the protective structure of the relay protection device provided by the utility model, the connecting piece is a screw, the connecting plate is provided with the second mounting holes, the second mounting holes are arranged in one-to-one correspondence with the first mounting holes, and the screw penetrates through the second mounting holes and is connected with the first mounting holes through threads.

In one possible implementation manner, in the protective structure of the relay protection device provided by the utility model, the number of the second mounting holes on the connecting plate is two, and the two second mounting holes are respectively positioned at two sides of the connecting position of the guide rail and the connecting plate.

In a possible implementation manner, the protective structure of the relay protection device provided by the utility model has the advantages that the mounting groove is a through groove, and the notch at the two ends of the mounting groove faces the inlet to the opening respectively; the live wire and the zero line of the relay and the air-break power supply are inserted into the mounting groove through the notch of the mounting groove.

In one possible implementation manner, the protection structure of the relay protection device provided by the utility model has the advantages that the indication component is arranged on the protection shell; the indication assembly is electrically connected with the idle switch, and when the idle switch is disconnected with the live wire and the zero wire, the indication assembly changes the display color.

In one possible implementation manner, the protection structure of the relay protection device provided by the utility model comprises the connecting rod and the indicating lamp, wherein the connecting rod is connected with the outer surface of the protection shell, the indicating lamp is connected with the connecting rod, and the indicating lamp is used for displaying colors.

In one possible implementation manner, the protective structure of the relay protection device provided by the utility model further comprises a standby power supply, wherein the standby power supply is arranged on the protective shell, and the indicator lamp is electrically connected with the standby power supply; when the idle switch is disconnected from the live wire and the zero wire, the standby power supply supplies power to the indicator lamp so that the indicator lamp displays red; when the air switch is connected with the live wire and the zero line, the live wire and the zero line supply power for the indicator lamp, so that the indicator lamp displays green.

In one possible implementation manner, the protection structure of the relay protection device provided by the utility model is characterized in that the indicator lamp and the standby power supply are positioned at the top of the protection shell.

According to the protective structure of the relay protection device, the protective shell is internally provided with the mounting cavity, the protective shell is provided with the opposite outlet and the inlet, the outlet and the inlet are communicated with the mounting cavity, the mounting seat is arranged in the mounting cavity, and the mounting seat is provided with the mounting groove; the connecting assembly is connected with the mounting seat so as to fix the relay and the air switch which are mutually connected in the mounting cavity, thereby effectively preventing dust accumulation and realizing protection of the relay protection device. And the indication component sends out a power-off reminding indication when the power is turned on or off in the air, so that the working personnel can be effectively and rapidly reminded of the fault condition.

Drawings

In order to more clearly illustrate the embodiments of the present utility model or the technical solutions of the prior art, the following description will briefly explain the drawings used in the embodiments or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present utility model, and other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic structural diagram of a protection structure of a relay protection device according to an embodiment of the present utility model;

FIG. 2 is a schematic view of the structure of FIG. 1 at another angle;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

fig. 4 is a schematic diagram of circuit connection of the indicator lamp in fig. 1.

Reference numerals illustrate:

100: a connection assembly; 110: a connecting piece; 120: a connecting frame; 121: a connecting plate; 122: a guide rail;

200: a protective housing; 210: a mounting cavity;

300: a mounting base; 310: a mounting groove;

410: a first mounting hole; 420: a second mounting hole;

500: a relay;

600: opening the door;

700: an indication assembly; 710: a connecting rod; 720: an indicator light; 730: a standby power supply;

800: a firing line;

900: zero line.

Specific embodiments of the present utility model have been shown by way of the above drawings and will be described in more detail below. The drawings and the written description are not intended to limit the scope of the inventive concepts in any way, but rather to illustrate the inventive concepts to those skilled in the art by reference to the specific embodiments.

Detailed Description

First, in order to make the objects, technical solutions and advantages of the present utility model more apparent, the technical solutions in the embodiments of the present utility model will be described in more detail with reference to the accompanying drawings in the preferred embodiments of the present utility model. It is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments, and that all other embodiments obtained by persons of ordinary skill in the art without making creative efforts based on the embodiments in the present utility model are within the protection scope of the present utility model.

Further, it should be noted that, in the description of the embodiments of the present utility model, terms such as "upper," "lower," "inner," "outer," and terms of orientation or positional relationship are based on the directions or positional relationships shown in the drawings, and are merely for convenience of description, not to indicate or imply that the apparatus or components must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the embodiments of the present utility model.

Furthermore, it should be noted that the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby a feature defining "first," "second," or the like may explicitly or implicitly include one or more such features, and in the description of the present utility model, the meaning of "plurality" is two or more unless otherwise specifically limited.

Relay protection is an important measure for detecting faults or abnormal conditions occurring in a power system and then isolating and cutting off fault parts. The equipment for realizing the relay protection function is called a relay protection device. A relay protection device in a traction substation (such as an opening and closing station or a partition pavilion) is started by short-circuit current generated by an accident, and a breaker for supplying power to the accident point is automatically disconnected, so that the accident range is reduced, and the safe operation of other equipment and normal power supply to a non-accident line are ensured. Relay protection device in the related art, including relay and air switch (can be called empty switch), relay and air switch are direct with the circuit installation use, and relay and air switch accumulate the dust easily, lead to the performance of relay and air switch to receive the influence. In addition, most of the using equipment is singly limited to tripping in the power-off tripping process, so that a good warning effect cannot be made, and a worker cannot be quickly reminded of the fault condition.

In view of the above, in the protective structure of the relay protection device provided by the embodiment of the utility model, the protective shell is internally provided with the installation cavity, the protective shell is provided with the opposite outlet and the inlet, the outlet and the inlet are communicated with the installation cavity, the installation seat is arranged in the installation cavity, and the installation seat is provided with the installation groove; the connecting assembly is connected with the mounting seat so as to fix the relay and the air switch which are mutually connected in the mounting cavity, thereby effectively preventing dust accumulation and realizing protection of the relay protection device. And with the instruction subassembly setting on protective housing, the instruction subassembly is when the outage is cut off in the sky, sends the outage and reminds the instruction to the effectual quick staff's of reminding trouble condition.

The utility model will now be described in detail with reference to the accompanying drawings and examples:

fig. 1 is a schematic structural diagram of a protection structure of a relay protection device according to an embodiment of the present utility model; fig. 2 is a schematic view of another angle of fig. 1.

Referring to fig. 1 and fig. 2, the protection structure of the relay protection device provided by the embodiment of the utility model includes a connection assembly 100, a protection housing 200, a mounting seat 300 and an indication assembly 700, wherein the protection housing 200 is provided with a mounting cavity 210, the protection housing 200 is provided with an opposite outlet and an opposite inlet, the outlet and the inlet are both communicated with the mounting cavity 210, the mounting seat 300 is arranged in the mounting cavity 210, and the mounting seat 300 is provided with a mounting groove 310; the connection assembly 100 is connected with the mount 300 to fix the interconnected relay 500 and air gap 600 within the mounting cavity 210; the indication assembly 700 is arranged on the protective shell 200, and the indication assembly 700 sends out a power-off reminding indication when the air switch 600 is powered off.

Wherein, the protective housing 200 may have a rectangular housing shape, the interior of the protective housing 200 forms the installation cavity 210, and opposite ends of the protective housing 200 are provided with openings, thereby forming an outlet and an inlet of the protective housing 200, both of which are communicated with the installation cavity 210. Thus, the relay 500 and the air gap 600 may be placed in the installation cavity 210 through the outlet or the inlet, thereby protecting the relay 500 and the air gap 600 by the protective case 200.

In a specific implementation, the protective housing 200 may be a transparent plastic member, and other transparent insulating materials may be used for the protective housing 200. By adopting the transparent material, the relay 500 and the air switch 600 can be conveniently observed.

Wherein, mount 300 can be embedded in mounting cavity 210, the outer dimension of mount 300 can be compatible with the inside wall of mounting cavity 210 for mount 300 can be embedded in protective housing 200, thereby, mount 300 is fixed through protective housing 200.

It will be appreciated that the mounting block 300 may be integrally formed with the guard housing 200, thereby facilitating the processing of the guard housing 200 and the mounting block 300.

In particular, in order to facilitate the installation of the relay 500 and the air switch 600, a connection assembly 100 may be further provided, the connection assembly 100 being used to provide installation positions for the relay 500 and the air switch 600, the relay 500 and the air switch 600 may be installed on the connection assembly 100, and connected with the installation base 300 through the connection assembly 100, so as to fix the relay 500 and the air switch 600 to be interconnected in the installation cavity 210.

The worker is difficult to know whether the air switch 600 is powered off in time, so the utility model also sets the indicating component 700 on the protective shell 200, and sends out a power-off reminding indication when the air switch 600 is powered off through the indicating component 700, thereby enabling the worker to know whether the air switch 600 is powered off in time. According to the protective structure of the relay protection device, the protective shell 200 is internally provided with the installation cavity 210, the protective shell 200 is provided with the opposite outlet and the inlet, the outlet and the inlet are communicated with the installation cavity 210, the installation seat 300 is arranged in the installation cavity 210, and the installation seat 300 is provided with the installation groove 310; the connection assembly 100 is connected with the mounting base 300 to fix the relay 500 and the air gap 600, which are connected to each other, in the mounting cavity 210, thereby effectively preventing dust accumulation and thus achieving protection of the relay protection device. And the indicating assembly 700 is arranged on the protective shell 200, and the indicating assembly 700 sends out a power-off reminding indication when the air switch 600 is powered off, so that the working personnel can be effectively and quickly reminded of the fault condition.

Fig. 3 is a partial enlarged view at a in fig. 2. Referring to fig. 1 to 3, in the embodiment of the present utility model, the connection assembly 100 includes a connection member 110 and a connection frame 120, a first mounting hole 410 is formed in the mounting base 300, and the connection member 110 is connected to the first mounting hole 410 through the connection frame 120; the connection frame 120 is used for installing the relay 500 and the air switch 600.

Wherein, relay 500 and open 600 can be installed at link 120, support relay 500 and open 600 through link 120, realize fixing relay 500 and open 600 in installation cavity 210 through the connection of link 120 and mount pad 300.

The relay 500 is an electric control device and forms a program control circuit with other electric appliances, so that automatic operation is realized, and the functions of automatic adjustment, safety protection and circuit conversion are achieved.

Among them, the air switch 600, that is, an air switch, also called an air circuit breaker, is one of the circuit breakers. When the circuit is overloaded, the circuit is automatically opened to protect the whole circuit.

Wherein the relay 500 and the air switch 600 are connected in series in the circuit.

In the present utility model, the connection member 110 may be a screw, and the first mounting hole 410 may be a screw hole, and the screw is passed through the connection frame 120 and then inserted into the first mounting hole 410, thereby fixing the connection member 110 to the mount 300.

In the embodiment of the present utility model, the connection frame 120 includes two connection plates 121 and a guide rail 122, and the two connection plates 121 are connected through the guide rail 122; the two connecting plates 121 are respectively positioned at two sides of the mounting groove 310, and the guide rail 122 is partially covered on the notch of the mounting groove 310; both relay 500 and air switch 600 are plugged into rail 122.

The two connection plates 121 may be respectively located at two ends of the guide rail 122 and respectively connected with two ends of the guide rail 122, thereby forming an i-shaped connection frame 120.

Alternatively, the two connection plates 121 and the guide rail 122 may be a metal material or an alloy material. Wherein, grooves can be formed at the same position of the two connecting plates 121, and the width is consistent with the width of the guide rail 122, so that the end parts of the guide rail 122 are embedded into the grooves. Alternatively, the guide rails 122 may be fixed to the two connection plates 121 by welding. The welding adaptability is wide, and the connection performance is good. Such connection may increase the stability of the connection frame 120.

Wherein, relay 500 and blank 600 can all peg graft with guide rail 122, and optionally set up the draw-in groove that corresponds guide rail 122 on relay 500 and blank 600 respectively, the draw-in groove card is on guide rail 122, realizes relay 500 and blank 600 and guide rail 122 grafting. Thereby facilitating the mounting of the relay 500 and the blank 600 on the rail 122.

In the embodiment of the present utility model, the connecting member 110 is a screw, the connecting plate 121 is provided with second mounting holes 420, the second mounting holes 420 are arranged in one-to-one correspondence with the first mounting holes 410, and the screw passes through the second mounting holes 420 and is connected with the first mounting holes 410 through threads.

Referring to fig. 2, the first mounting holes 410 are screw holes formed in the mounting base 300, and the number of the first mounting holes 410 is four, and the first mounting holes 410 are correspondingly formed in four corners of the mounting base 300. Referring to fig. 1, a second mounting hole 420 is formed in the connection plate 121, the second mounting hole 420 may be a through hole, and the first mounting hole 410 and the second mounting hole 420 are disposed in one-to-one correspondence, so that the connection piece 110 is used to connect the connection frame 120 with the first mounting hole 410 through the second mounting hole 420 on the connection plate 121, so as to realize a stable connection between the connection frame 120 and the mounting seat 300.

In the embodiment of the present utility model, the number of the second mounting holes 420 on the connecting plate 121 is two, and the two second mounting holes 420 are respectively located at two sides of the connection position of the guide rail 122 and the connecting plate 121. Wherein, the two second mounting holes 420 are provided on each connecting plate 121, so that the connecting plates 121 are more firmly fixed on the mounting base 300.

Fig. 4 is a schematic diagram of circuit connection of the indicator lamp in fig. 1. Referring to fig. 1 to 4, in the embodiment of the present utility model, the installation groove 310 is a through groove, and the notches at two ends of the installation groove 310 face to opposite inlets to outlets on the protective housing 200, respectively; the live wire 800 and the neutral wire 900 for supplying power to the relay 500 and the air switch 600 are inserted into the mounting groove 310 through the notch of the mounting groove 310.

The installation groove 310 provides a channel for the live wire 800 and the neutral wire 900, and the live wire 800 and the neutral wire 900 enter the relay 500 and the air switch 600 and are electrically connected with the relay 500 and the air switch 600, so that power is supplied to the relay 500 and the air switch 600.

In an embodiment of the present utility model, the indication assembly is electrically connected to the air switch 600, and the indication assembly changes display color when the air switch 600 is disconnected from the live wire 800 and the neutral wire 900.

The relay 500 is electrically connected to the live wire 800 and the neutral wire 900, the air switch 600 is electrically connected to the live wire 800 and the neutral wire 900, and the indicator lamp 720 is electrically connected to the live wire 800 and the neutral wire 900.

When the circuit fails, the relay 500 is a protection circuit, so that the air switch 600 is automatically disconnected from the live wire 800 and the neutral wire 900, and the display color is indicated to be replaced. To achieve a different color than when the circuit is operating normally, so that a worker can easily distinguish whether the neutral 600 is automatically disconnected from the live 800 and neutral 900 lines.

Wherein, the voltage to ground of the live wire 800 is 220V, and the voltage to ground of the zero wire 900 is equal to zero.

In an embodiment of the present utility model, the indicating assembly 700 includes a connection bar 710 and an indicating lamp 720, the connection bar 710 is connected with the outer surface of the protective housing 200, the indicating lamp 720 is connected with the connection bar 710, and the indicating lamp 720 is used for displaying colors.

The number of the connecting rods 710 may be two, and the two connecting rods 710 are vertically installed on the protective housing 200 correspondingly, so that the indicator lamp 720 is parallel to the outer line of the long side of the protective housing 200.

The connecting rod 710 may be made of the same material as the protective housing 200, the connecting rod 710 may be integrally formed with the protective housing 200, or a circular hole as large as the bottom end of the connecting rod 710 is formed in the protective housing 200, so that the connecting rod 710 is inserted into the protective housing 200, and then reinforced by an adhesive. The connecting rod 710 and the protective housing 200 may also be threaded. The present embodiment is not limited herein, as long as the connecting rod 710 can be firmly fixed to the protective housing 200.

The indicator lamp 720 and the connecting rod 710 may be welded, or the indicator lamp 720 and the connecting rod 710 may be bonded by using an adhesive. To achieve the firmness of the connection of the indicator lamp 720 with the two connection bars 710.

In the embodiment of the present utility model, the indication assembly 700 further includes a standby power supply 730, the standby power supply 730 is disposed on the protective housing 200, and the indication lamp 720 is electrically connected to the standby power supply 730; when the air switch 600 is disconnected from the live wire 800 and the neutral wire 900, the standby power supply 730 supplies power to the indicator lamp 720, so that the indicator lamp 720 displays red; when the air switch 600 is connected to the live wire 800 and the neutral wire 900, the live wire 800 and the neutral wire 900 supply power to the indicator lamp 720, so that the indicator lamp 720 displays green.

Optionally, the standby power supply 730 is an energy-storable capacitor, and when the mains supply is connected, the mains supply can charge the energy-storable capacitor, and when the mains supply is disconnected, the energy-storable capacitor discharges to provide electric quantity for the indicator lamp 720.

Wherein, the indicator lamp 720 and the standby power supply 730 are connected by a wire, and the wire is inserted into the installation groove 310 through the notch of the installation groove 310. Optionally, a groove matched with the standby power supply 730 is formed in the protective housing 200, so that the standby power supply 730 is just embedded into the protective housing 200 and is attached to the protective housing 200.

Alternatively, the indicator light 720 may be two colors, red and green, respectively. Of course, the device can be in other two colors which are easy to distinguish, or striking flashing lights can be adopted when faults occur, so that the purpose of rapidly reminding workers of the fault conditions is achieved. Optionally, the outline of the indicator 720 is cuboid, and of course, the outline of the indicator 720 can be other suitable shapes, so that an effective warning effect can be achieved.

When the air switch 600 is disconnected from the live wire 800 and the neutral wire 900, the standby power supply 730 supplies power to the indicator lamp 720, so that the indicator lamp 720 displays red. Optionally, the color of the indicator 720 may be red, or may be other striking colors, so as to provide an effective warning effect and prompt the staff of the fault condition.

When the air switch 600 is connected to the live wire 800 and the neutral wire 900, the live wire 800 and the neutral wire 900 supply power to the indicator lamp 720, so that the indicator lamp 720 displays green. Alternatively, the indicator light 720 may be green or another color commonly regarded as safe.

That is, in normal use, the indicator lamp 720 is green, and when the circuit fails, the air switch 600 is automatically disconnected from the live wire 800 and the neutral wire 900, the power supply to the indicator lamp 720 is stopped, and the indicator lamp 720 is switched to be supplied by the standby power supply 730. The color displayed by the indicator lamp 720 changes due to the switching of the power supply path.

The indication component 700 can effectively and quickly remind staff of fault conditions by converting display colors.

Optionally, the indication assembly 700 is disposed on top of the protective housing 200, which is convenient for observation, and can improve the warning effect of the indication assembly 700.

In summary, in the protective structure of the relay protection device according to the embodiment of the present utility model, the installation cavity 210 is disposed in the protective housing 200, and the protective housing 200 has an outlet and an inlet opposite to each other, both of which are communicated with the installation cavity 210, the installation seat 300 is disposed in the installation cavity 210, and the installation seat 300 is provided with the installation groove 310; the connection assembly 100 is connected with the mounting base 300 to fix the relay 500 and the air gap 600, which are connected to each other, in the mounting cavity 210, thereby effectively preventing dust accumulation and thus achieving protection of the relay protection device.

And the indicating assembly 700 is arranged on the protective shell 200, and the indicating assembly 700 sends out a power-off reminding indication when the air switch 600 is powered off, so that the working personnel can be effectively and quickly reminded of the fault condition.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and not for limiting the same; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the utility model.

Claims (10)

1. The protection structure of the relay protection device is characterized by comprising a protection shell, a mounting seat, a connecting assembly and an indicating assembly, wherein a mounting cavity is formed in the protection shell, an outlet and an inlet which are opposite are formed in the protection shell, the outlet and the inlet are communicated with the mounting cavity, the mounting seat is arranged in the mounting cavity, and a mounting groove is formed in the mounting seat;

the connecting component is connected with the mounting seat so as to fix the relay and the air gap which are mutually connected in the mounting cavity;

the indicating assembly is arranged on the protective shell, and the indicating assembly sends out a power-off reminding indication when the air is powered on and off.

2. The protective structure of the relay protection device according to claim 1, wherein the connecting assembly comprises a connecting piece and a connecting frame, the mounting seat is provided with a first mounting hole, and the connecting piece is connected with the first mounting hole through the connecting frame;

the connecting frame is used for installing the relay and the air switch.

3. The protective structure of the relay protection device according to claim 2, wherein the connection frame includes a guide rail and two connection plates, and the two connection plates are connected through the guide rail;

the two connecting plates are respectively positioned at two sides of the mounting groove, and the guide rail part covers the notch of the mounting groove;

the relay and the hollow switch are inserted into the guide rail.

4. The protective structure of the relay protection device according to claim 3, wherein the connecting piece is a screw, the connecting plate is provided with second mounting holes, the second mounting holes are arranged in one-to-one correspondence with the first mounting holes, and the screw penetrates through the second mounting holes and is connected with the first mounting holes through threads.

5. The protective structure of the relay protection device according to claim 4, wherein the number of the second mounting holes on the connecting plate is two, and the two second mounting holes are respectively located at two sides of the connection position of the guide rail and the connecting plate.

6. The protective structure of the relay protection device according to any one of claims 1 to 5, wherein the installation groove is a through groove, and notches at two ends of the installation groove face the inlet to the outlet respectively;

the relay and the live wire and the zero wire of the idle power supply are inserted into the mounting groove through the notch of the mounting groove.

7. The protective structure of the relay protection device according to claim 6, wherein the indication assembly is electrically connected to the air switch, and the indication assembly changes display color when the air switch is disconnected from the live wire and the neutral wire.

8. The protective structure of the relay protection device according to claim 7, wherein the indication assembly comprises a connection rod and an indication lamp, the connection rod is connected with an outer surface of the protective housing, the indication lamp is connected with the connection rod, and the indication lamp is used for displaying color.

9. The protective structure of the relay protection device according to claim 8, wherein the indication assembly further comprises a backup power source, the backup power source is disposed on the protective housing, and the indication lamp is electrically connected to the backup power source;

when the idle switch is disconnected from the live wire and the zero wire, the standby power supply supplies power to the indicator lamp so that the indicator lamp displays red;

when the air switch is connected with the live wire and the null wire, the live wire and the null wire supply power for the indicator lamp so that the indicator lamp is green.

10. The protective structure of the relay protection device of claim 9, wherein the indicator light and the backup power source are located at a top of the protective housing.