Power system fault isolation relay protection device

Abstract

The invention discloses a power system fault isolation relay protection device, and relates to the technical field of relay protection. The invention provides a power system fault isolation relay protection device which is accurate and rapid in isolation and comprises a shell, a cover plate, phase assemblies, connectors, an isolation switch, a separation mechanism and the like, the shell is rotationally connected with the cover plate, the shell is fixedly connected with the axially distributed phase assemblies, the connectors are fixedly connected between the axially distributed phase assemblies, and the isolation switch is fixedly connected with the separation mechanism. The shell is fixedly connected with an isolating switch, the isolating switch is electrically connected with the axially distributed phase assemblies through a circuit, and the connector is provided with a separating mechanism. According to the fault isolation relay protection device for the power system, power-off isolation can be accurately and quickly carried out on a single phase assembly when the single phase assembly breaks down through the electromagnet, the permanent magnet and other components, operation of other phase assemblies cannot be affected, and the isolation speed and accuracy of the fault isolation relay protection device for the power system are improved.

Description

Technical Field

[0001] The present invention relates to the technical field of relay protection, and in particular to a fault isolation relay protection device for a power system. Background Art

[0002] Relay protection is an important measure to detect faults or abnormal conditions in the power system, thereby issuing an alarm signal, or directly isolating and removing the faulty part. The basic task of relay protection is to automatically remove the faulty equipment from the system in the shortest possible time and smallest area when a fault or abnormal condition occurs in the power system, or to send a signal to the on-duty personnel to eliminate the root cause of the abnormal condition, so as to reduce or avoid damage to the equipment and the impact on the power supply to adjacent areas.

[0003] In the patent with publication number CN116388129A, a relay protection device of an automated power system is disclosed. The relay protection device includes a box, a power control box, an intelligent circuit breaker control box, a circuit protection control box, an insulator and a wire tube. A partition is provided in the box; a circuit safety monitoring device is provided on the top of the box, the output end of the power control box is electrically connected to the input end of the intelligent circuit breaker control box, the output end of the intelligent circuit breaker control box is electrically connected to the input end of the circuit protection control box, and the output end of the circuit protection control box is electrically connected to the input end of the circuit safety monitoring device; the present invention uses the circuit safety monitoring device to monitor the voltage and The current is monitored and protected. The voltage protection module and the current protection module send the overvoltage and overcurrent data to the monitoring platform through the alarm module, and analyze and compare them through the circuit fault comparison module to find the source of the circuit fault; the circuit fault comparison module sends the comparison data to the intelligent circuit breaker control box to cut off the power circuit for protection. However, this relay protection device needs to monitor the current and voltage in real time through the monitoring device, and can control the circuit to be cut off only after comparing and analyzing the data. The fault isolation speed is slow, and directly cutting off the power circuit will also cause the machines in the area that have no faults to stop working, and the isolation accuracy is low.

[0004] Based on the above situation, the present invention proposes a power system fault isolation relay protection device with accurate and rapid isolation. Summary of the invention

[0005] In order to overcome the shortcomings of existing relay protection devices, which require real-time monitoring of current and voltage through monitoring devices and control circuit disconnection only after comparative analysis of the data, slow fault isolation speed, and directly disconnecting the power circuit will also cause non-faulty machines in the area to stop working, and low isolation accuracy, the present invention provides a power system fault isolation relay protection device with accurate and rapid isolation.

[0006] A power system fault isolation relay protection device comprises a shell, a cover plate, a phase assembly, a connector, an isolating switch and a separation mechanism, wherein the shell is rotatably connected to the cover plate, the shell is fixedly connected to axially distributed phase assemblies, the connectors are fixedly connected between the axially distributed phase assemblies, the shell is fixedly connected to the isolating switch, the isolating switch is electrically connected to the axially distributed phase assemblies through a line, and the connector is provided with a separation mechanism.

[0007] More preferably, the separation mechanism for controlling the power failure of the phase component includes a fixed plate, a static contact, a moving contact, an electromagnet, a permanent magnet and a first sliding rod, the fixed plate is fixed between the connector and the housing, the connector is fixed with an axially distributed static contact, the static contact is electrically connected to the phase component through a line, the static contact is slidably connected to the moving contact, the moving contact is fixed with a permanent magnet, the permanent magnet is fixed with the first sliding rod, the fixed plate is fixed with an axially distributed electromagnet, the first sliding rod is slidably connected to the electromagnet, and the electromagnet and the permanent magnet are magnetically matched.

[0008] More preferably, the phase assembly has a built-in fault detector, and the fault detector is electrically connected to the adjacent electromagnet.

[0009] More preferably, it also includes a power-off mechanism for controlling the overall power-off, which is arranged on the fixed plate, and includes a guide plate, a second sliding rod, a first elastic rope, a card plate, a contact rod and a card rod, the guide plate is fixed to the fixed plate, the guide plate is slidably connected to the second sliding rod, the first elastic rope is fixed between the second sliding rod and the guide plate, the second sliding rod is fixed to the card plate, the isolating switch is rotatably connected to the contact rod, the second sliding rod is squeezed together with the contact rod, the first sliding rod is fixed to the card rod, and the card rod is slidably connected to the card plate.

[0010] More preferably, it also includes an arc extinguishing mechanism for extinguishing high-voltage arcs. The arc extinguishing mechanism is arranged on the moving contact. The arc extinguishing mechanism includes an inclined rod, a sliding arc extinguishing grid, a fixed rod and a second elastic rope. The pairs of inclined rods are fixed to the moving contact. The fixed plate is slidably connected with an axially distributed sliding arc extinguishing grid. A pair of second elastic ropes are fixed between the sliding arc extinguishing grid and the fixed plate. The sliding arc extinguishing grid is fixed with the fixed rod, and the fixed rod is squeezed together with the inclined rod.

[0011] More preferably, the sliding arc extinguishing grid is made of insulating material.

[0012] More preferably, it also includes an opening and closing mechanism for controlling the opening and closing of the vents, the opening and closing mechanism is arranged on the shell, the opening and closing mechanism includes an electric guide rail, a rain sensor, a sliding frame, a baffle, a first support plate and a protrusion, the pair of electric guide rails are fixed to the shell, the shell is fixed with a rain sensor, the rain sensor is electrically connected to the electric guide rails, the electric guide rails are slidably connected to the sliding frame, the shell is fixed with a pair of first support plates, the pair of first support plates are rotatably connected with longitudinally distributed baffles, the baffles are fixed with a pair of protrusions, and the protrusions are squeezed fit with the sliding frame.

[0013] More preferably, it also includes an energy-saving mechanism for supplying energy to the electric guide rail, the energy-saving mechanism is arranged on the outer shell, the energy-saving mechanism includes a second support plate and a solar panel, the paired second support plates are fixed to the outer shell, the second support plates are fixed with the solar panel, and the solar panel is electrically connected to the electric guide rail.

[0014] More preferably, the second supporting plate is provided with an inclined surface.

[0015] More preferably, it also includes an alarm mechanism for reminding workers to perform maintenance. The alarm mechanism is arranged on a fixed plate. The alarm mechanism includes a voltage sensor and an alarm. The voltage sensor is fixed to the fixed plate. The voltage sensor is electrically connected to the phase component. The voltage sensor is fixed to the alarm. The voltage sensor and the alarm are electrically connected.

[0016] The beneficial effects of the present invention are as follows: 1. The present invention uses components such as electromagnets and permanent magnets to accurately and quickly cut off power to and isolate a single phase component when a fault occurs without affecting the operation of other phase components, thereby improving the isolation speed and accuracy of the fault isolation relay protection device of the power system.

[0017] 2. The present invention uses components such as the second sliding rod and the contact rod to cut off the total power supply of the phase components when the fault is serious, that is, all three phase components fail, so as to protect the system from further damage, thereby improving the safety of use and isolation effect of the fault isolation relay protection device of the power system.

[0018] 3. The present invention uses components such as a sliding arc extinguishing grid and a second elastic rope to insert a sliding arc extinguishing grid between the static contact and the moving contact when the two are separated, thereby avoiding arcing due to excessive current when the two are disconnected, thereby causing damage to the static contact and the moving contact, thereby improving the safety of the use of the fault isolation relay protection device of the power system.

[0019] 4. The present invention can automatically close the vents on rainy days through components such as baffles and solar panels to prevent rainwater from entering the box and affecting the operation of the phase components. It can also use solar panels to store energy and power the electric guide rails, reducing its own resource consumption and improving the safety and practicality of the fault isolation relay protection device of the power system.

[0020] 5. The present invention uses components such as voltage sensors and alarms to issue an alarm when a phase component fails and is powered off and isolated, and promptly reminds workers to handle and repair it, thereby improving the practicality of the power system fault isolation relay protection device and the workers' experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention.

[0022] Figure 2 It is a schematic diagram of the three-dimensional structure of the housing, cover plate and phase assembly of the present invention.

[0023] Figure 3 It is a three-dimensional structural schematic diagram of the phase assembly, connector and disconnector of the present invention.

[0024] Figure 4 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixing plate, the static contact and the moving contact of the present invention.

[0025] Figure 5 It is a schematic diagram of the exploded three-dimensional structure of the static contact, the moving contact and the electromagnet of the present invention.

[0026] Figure 6 It is a schematic diagram of the cross-sectional three-dimensional structure of the guide plate, the second sliding rod and the clamping plate of the present invention.

[0027] Figure 7 It is a schematic diagram of the three-dimensional structure of the second sliding rod, the first elastic rope and the clamping plate of the present invention.

[0028] Figure 8 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixed plate, inclined rod and sliding arc-extinguishing grid of the present invention.

[0029] Fig. 9 It is a schematic diagram of the cross-sectional three-dimensional structure of the fixing plate, the inclined rod and the second elastic rope etc. of the present invention.

[0030] Fig.10 It is a schematic diagram of the three-dimensional structure of the sliding arc extinguishing grid, the fixing rod and the second elastic rope of the present invention.

[0031] Fig.11 It is a schematic diagram of the cross-sectional three-dimensional structure of the sliding arc extinguishing grid and the fixing rod of the present invention.

[0032] Fig.12It is a partial three-dimensional structural schematic diagram of the electric guide rail, rain sensor and sliding frame of the present invention.

[0033] Fig.13 It is a schematic diagram of the three-dimensional structure of the baffle and the first support plate of the present invention.

[0034] Fig.14 It is a schematic diagram of the three-dimensional structure of the electric guide rail, the second support plate and the solar panel of the present invention.

[0035] Fig.15 It is a three-dimensional structural schematic diagram of the fixing plate, voltage sensor and alarm of the present invention.

[0036] Names of the numbers in the figure: 1, housing, 2, cover plate, 3, phase assembly, 31, connector, 4, isolating switch, 5, separation mechanism, 51, fixing plate, 52, static contact, 53, moving contact, 54, electromagnet, 541, permanent magnet, 55, first sliding rod, 6, power-off mechanism, 61, guide plate, 62, second sliding rod, 63, first elastic rope, 64, clamping plate, 65, contact rod, 66, clamping rod, 7, arc extinguishing mechanism, 71, oblique rod, 72, sliding arc extinguishing grid, 73, fixing rod, 74, second elastic rope, 8, opening and closing mechanism, 81, electric guide rail, 82, rain sensor, 83, sliding frame, 84, baffle, 841, first support plate, 85, bump, 9, energy-saving mechanism, 91, second support plate, 92, solar panel, 10, alarm mechanism, 101, voltage sensor, 102, alarm. DETAILED DESCRIPTION

[0037] The present invention will be further described below in conjunction with the embodiments shown in the accompanying drawings.

[0038] Example 1

[0039] A power system fault isolation relay protection device, such as Figure 1-Figure 5 As shown, it includes a shell 1, a cover plate 2, a phase component 3, a connector 31, an isolating switch 4 and a separation mechanism 5. The cover plate 2 is rotatably connected to the front side of the shell 1, three axially distributed phase components 3 are fixedly connected to the rear side of the inner wall of the shell 1, the connector 31 is fixedly connected between the tops of the three axially distributed phase components 3, the isolating switch 4 is fixedly connected to the rear side of the inner wall of the shell 1, the isolating switch 4 is electrically connected to the three axially distributed phase components 3 through a line, and the separation mechanism 5 is provided on the connector 31.

[0040] like Figure 4 and Figure 5As shown, the separation mechanism 5 for controlling the power failure of the phase component 3 includes a fixed plate 51, a static contact 52, a moving contact 53, an electromagnet 54, a permanent magnet 541 and a first sliding rod 55. The fixed plate 51 is fixed between the top of the connector 31 and the inner wall of the shell 1. Three axially distributed static contacts 52 are fixed to the top of the connector 31. The static contacts 52 are electrically connected to the adjacent phase components 3 through a line. The top of the static contact 52 is slidably connected to the moving contact 53. The top of the moving contact 53 is fixed to the permanent magnet 541. The top of the permanent magnet 541 is fixed to the first sliding rod 55. Three axially distributed electromagnets 54 are fixed inside the fixed plate 51. The first sliding rod 55 is slidably connected to the adjacent electromagnet 54. The electromagnet 54 is magnetically matched with the adjacent permanent magnet 541.

[0041] like Figure 2-Figure 4 As shown, the phase assembly 3 has a built-in fault detector, and the fault detector is electrically connected to the adjacent electromagnet 54 .

[0042] When a single phase component 3 fails and needs to be accurately powered off and isolated, the fault detector of the phase component 3 will detect the current and voltage during its operation. When the current or voltage is not within a reasonable fluctuation range, the corresponding electromagnet 54 will be activated. At this time, the electromagnet 54 will attract the corresponding permanent magnet 541, thereby driving the permanent magnet 541, the moving contact 53 and the first sliding rod 55 to move upward until the permanent magnet 541 and the electromagnet 54 are adsorbed and fixed together, and the moving contact 53 moves upward to separate from the static contact 52, thereby powering off and isolating the corresponding phase component 3. In this way, when a single phase component 3 fails, it can be accurately and quickly powered off and isolated without affecting the operation of other phase components 3. Only when the staff handles and repairs the faulty phase component 3 can the electromagnet 54 and the corresponding permanent magnet 541 repel each other, so that the permanent magnet 541, the moving contact 53 and the first sliding rod 55 move downward and reset, and the moving contact 53 and the static contact 52 are reconnected to restore the power supply to the phase component 3.

[0043] Example 2

[0044] On the basis of Example 1, Figure 6 and Figure 7As shown, it also includes a power-off mechanism 6 for controlling the overall power-off. The power-off mechanism 6 is arranged on the fixed plate 51. The power-off mechanism 6 includes a guide plate 61, a second sliding rod 62, a first elastic rope 63, a clamping plate 64, a contact rod 65 and a clamping rod 66. The guide plate 61 is fixed to the top of the fixed plate 51. The top of the guide plate 61 is slidably connected with the second sliding rod 62. The first elastic rope 63 is fixed between the second sliding rod 62 and the guide plate 61. The front side of the second sliding rod 62 is fixed with the clamping plate 64. The front side of the isolating switch 4 is rotatably connected with the contact rod 65. The second sliding rod 62 is squeezed and matched with the contact rod 65. The top of the first sliding rod 55 is fixed with the clamping rod 66, and the clamping rod 66 is slidably connected with the clamping plate 64.

[0045] When a single phase assembly 3 fails, and the electromagnet 54 drives the permanent magnet 541, the moving contact 53 and the first sliding rod 55 to move upward, the corresponding clamping rod 66 will also move upward and separate from the clamping plate 64. Therefore, when all three phase assemblies 3 fail, that is, the failure is serious, the three clamping rods 66 will all move upward and separate from the clamping plate 64. At this time, the clamping plate 64 loses its restriction and moves to the right with the second sliding rod 62 under the action of the first elastic rope 63. The second sliding rod 62 moves to the right to contact and squeeze the contact rod 65, thereby When the contact rod 65 rotates and closes the isolating switch 4, the total power supply of the three-phase components 3 can be cut off, thereby protecting the power system from further damage. When the maintenance personnel have completed the fault inspection, they can first move the clamping plate 64 to the left to reset, and the first elastic rope 63 is stretched immediately. Then, the clamping rod 66 moves downward along with the permanent magnet 541, the moving contact 53 and the first sliding rod 55 to reset and re-constrain the clamping plate 64. Finally, the contact rod 65 is rotated in the opposite direction to reset, thereby opening the isolating switch 4 and restoring power supply.

[0046] like Figure 8-Figure 11 As shown, it also includes an arc extinguishing mechanism 7 for extinguishing a high-voltage arc. The arc extinguishing mechanism 7 is arranged on the moving contact 53. The arc extinguishing mechanism 7 includes an inclined rod 71, a sliding arc extinguishing grid 72, a fixed rod 73 and a second elastic rope 74. The two inclined rods 71 ​​are respectively fixed to the left and right sides of the moving contact 53. The lower part of the fixed plate 51 is slidably connected to three axially distributed sliding arc extinguishing grids 72. Two left and right second elastic ropes 74 are fixed between the sliding arc extinguishing grid 72 and the fixed plate 51. The fixed rod 73 is fixed to the front side of the top of the sliding arc extinguishing grid 72. The fixed rod 73 is squeezed and fitted with the adjacent inclined rod 71.

[0047] like Fig.11 As shown, the sliding arc extinguishing grid 72 is made of insulating material.

[0048] When the permanent magnet 541, the moving contact 53, the first sliding rod 55 and other components move upward, the sliding arc extinguishing grid 72 will move forward under the action of the second elastic rope 74 and extend into between the static contact 52 and the moving contact 53, so as to avoid arcing due to excessive current when the static contact 52 and the moving contact 53 are disconnected, thereby causing damage to the static contact 52 and the moving contact 53; when the permanent magnet 541, the moving contact 53 and the first sliding rod 55 move downward to reset, the inclined rod 71 will also move downward, and the downward movement of the inclined rod 71 will contact and squeeze the fixed rod 73, so that the fixed rod 73 and the sliding arc extinguishing grid 72 move backward to reset, and the second elastic rope 74 is immediately stretched.

[0049] like Figure 1 , Fig.12 and Fig.13 As shown, it also includes an opening and closing mechanism 8 for controlling the opening and closing of the vent, which is arranged on the shell 1. The opening and closing mechanism 8 includes an electric guide rail 81, a rain sensor 82, a sliding frame 83, a baffle 84, a first support plate 841 and a protrusion 85. The two electric guide rails 81 are respectively fixed to the left and right sides of the shell 1. The rain sensor 82 is fixed to the right side of the shell 1. The rain sensor 82 is electrically connected to the electric guide rail 81. The two electric guide rails 81 are slidably connected to the sliding frame 83 on the sides away from each other. The left and right sides of the shell 1 are fixed with first support plates 841 symmetrically distributed front and back. A baffle 84 distributed vertically up and down is rotatably connected between the front and rear first support plates 841. The front and rear sides of the baffle 84 are fixed with protrusions 85, and the protrusions 85 are squeezed and matched with the adjacent sliding frame 83.

[0050] like Fig.14 As shown, it also includes an energy-saving mechanism 9 for supplying energy to the electric guide rail 81. The energy-saving mechanism 9 is arranged on the outer shell 1. The energy-saving mechanism 9 includes a second support plate 91 and a solar panel 92. The two second support plates 91 are respectively fixed to the left and right sides of the outer shell 1. The solar panel 92 is fixed to the top of the second support plate 91. The solar panel 92 is electrically connected to the electric guide rail 81.

[0051] like Fig.14 As shown, the two second support plates 91 are provided with inclined surfaces on the sides away from each other.

[0052] In order to keep the housing 1 ventilated and prevent the internal phase assembly 3 from overheating and malfunctioning, the vents of the housing 1 are usually in an open state, that is, the baffle 84 is in a horizontal state. When the rain sensor 82 detects that the air humidity is high and it is about to rain, the electric guide rail 81 is started through the controller and drives the sliding frame 83 to move downward. When the sliding frame 83 moves downward and no longer restricts the protrusion 85, the baffle 84 and the protrusion 85 will rotate downward 90° under the action of gravity to close the vents, thereby preventing rain from entering the box and affecting the operation of the phase assembly 3. When the weather is clear and the air is cool, the air is cooled and the humidity is high. When the humidity is low, the rain sensor 82 will cause the electric guide rail 81 to drive the sliding frame 83 to move upward and reset. The upward movement of the sliding frame 83 will contact and squeeze the protrusion 85, so that the baffle 84 and the protrusion 85 will rotate 90 degrees in the opposite direction to restore the original state and open the vent. The presence of the solar panel 92 can convert solar energy into electrical energy and store it, and supply power to the electric guide rail 81 when needed, thereby reducing the consumption of external power supply, thereby reducing the overall energy loss of the device. The inclined design of the second support plate 91 can also guide rainwater to prevent rainwater from entering the interior of the housing 1 through the vent.

[0053] like Fig.15 As shown, it also includes an alarm mechanism 10 for reminding workers to perform maintenance. The alarm mechanism 10 is set on the fixed plate 51. The alarm mechanism 10 includes a voltage sensor 101 and an alarm 102. The voltage sensor 101 is fixed to the top right side of the fixed plate 51. The voltage sensor 101 is electrically connected to the phase component 3. The alarm 102 is fixed to the top of the voltage sensor 101, and the voltage sensor 101 and the alarm 102 are electrically connected.

[0054] Whenever the phase assembly 3 is powered off due to a fault, the voltage sensor 101 will detect the voltage abnormality of the phase assembly 3. At this time, the voltage sensor 101 will cause the alarm 102 to sound an alarm through the controller, thereby reminding the staff to handle and repair it in time.

[0055] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A power system fault isolation relay protection device, characterized in that: The invention comprises a housing (1), a cover plate (2), a phase assembly (3), a connector (31) and an isolating switch (4); the housing (1) is rotatably connected to the cover plate (2); the housing (1) is fixedly connected to axially distributed phase assemblies (3); the connector (31) is fixedly connected between the axially distributed phase assemblies (3); the housing (1) is fixedly connected to the isolating switch (4); the isolating switch (4) and the axially distributed phase assemblies (3) are electrically connected via a line; the invention is characterized in that the invention further comprises a separation mechanism (5); and the separation mechanism (5) is provided on the connector (31).

2. A power system fault isolation relay protection device as claimed in claim 1, characterized in that: The separation mechanism (5) for controlling the power off of the phase assembly (3) comprises a fixed plate (51), a static contact (52), a moving contact (53), an electromagnet (54), a permanent magnet (541) and a first sliding rod (55); the fixed plate (51) is fixed between the connector (31) and the housing (1); the connector (31) is fixed with an axially distributed static contact (52); the static contact (52) is electrically connected to the phase assembly (3) through a circuit; the static contact (52) is slidably connected to the moving contact (53); the moving contact (53) is fixed with a permanent magnet (541); the permanent magnet (541) is fixed with the first sliding rod (55); the fixed plate (51) is fixed with an axially distributed electromagnet (54); the first sliding rod (55) is slidably connected to the electromagnet (54); the electromagnet (54) and the permanent magnet (541) are magnetically matched.

3. A power system fault isolation relay protection device as claimed in claim 2, characterized in that: The phase assembly (3) has a built-in fault detector, and the fault detector is electrically connected to the adjacent electromagnet (54).

4. A power system fault isolation relay protection device as claimed in claim 3, characterized in that: The invention also comprises a power-off mechanism (6) for controlling the overall power-off. The power-off mechanism (6) is arranged on the fixed plate (51). The power-off mechanism (6) comprises a guide plate (61), a second sliding rod (62), a first elastic rope (63), a clamping plate (64), a contact rod (65) and a clamping rod (66). The guide plate (61) is fixed to the fixed plate (51). The guide plate (61) is slidably connected to the second sliding rod (62). The first elastic rope (63) is fixed between the second sliding rod (62) and the guide plate (61). The second sliding rod (62) is fixedly connected to the clamping plate (64). The isolating switch (4) is rotatably connected to the contact rod (65). The second sliding rod (62) and the contact rod (65) are pressed together. The first sliding rod (55) is fixedly connected to the clamping rod (66). The clamping rod (66) is slidably connected to the clamping plate (64).

5. A power system fault isolation relay protection device as claimed in claim 4, characterized in that: The invention also comprises an arc extinguishing mechanism (7) for extinguishing a high-voltage arc. The arc extinguishing mechanism (7) is arranged on the moving contact (53). The arc extinguishing mechanism (7) comprises an inclined rod (71), a sliding arc extinguishing grid (72), a fixed rod (73) and a second elastic rope (74). The paired inclined rods (71) are fixedly connected to the moving contact (53). The fixed plate (51) is slidably connected to the sliding arc extinguishing grid (72) distributed axially. A paired second elastic rope (74) is fixedly connected between the sliding arc extinguishing grid (72) and the fixed plate (51). The sliding arc extinguishing grid (72) is fixedly connected to the fixed rod (73). The fixed rod (73) and the inclined rod (71) are extruded and matched.

6. A power system fault isolation relay protection device as claimed in claim 5, characterized in that: The sliding arc extinguishing grid (72) is made of insulating material.

7. A power system fault isolation relay protection device as claimed in claim 6, characterized in that: The invention also comprises an opening and closing mechanism (8) for controlling the opening and closing of the vent, the opening and closing mechanism (8) being arranged on the housing (1), the opening and closing mechanism (8) comprising an electric guide rail (81), a rain sensor (82), a sliding frame (83), a baffle (84), a first support plate (841) and a protrusion (85), the paired electric guide rails (81) being fixed to the housing (1), the housing (1) being fixed with the rain sensor (82), the rain sensor (82) being electrically connected to the electric guide rail (81), the electric guide rail (81) being slidably connected to the sliding frame (83), the housing (1) being fixed with a paired first support plate (841), the paired first support plates (841) being rotatably connected with a baffle (84) distributed longitudinally, the baffle (84) being fixed with a paired protrusion (85), the protrusion (85) being pressed and matched with the sliding frame (83).

8. A power system fault isolation relay protection device as claimed in claim 7, characterized in that: The invention also comprises an energy-saving mechanism (9) for supplying energy to the electric guide rail (81), the energy-saving mechanism (9) being arranged on the housing (1), the energy-saving mechanism (9) comprising a second support plate (91) and a solar panel (92), the paired second support plates (91) being fixedly connected to the housing (1), the second support plates (91) being fixedly connected to the solar panel (92), and the solar panel (92) being electrically connected to the electric guide rail (81).

9. A power system fault isolation relay protection device as claimed in claim 8, characterized in that: The second supporting plate (91) is provided with an inclined surface.

10. A power system fault isolation relay protection device as claimed in claim 9, characterized in that: The device also includes an alarm mechanism (10) for reminding workers to perform maintenance. The alarm mechanism (10) is arranged on the fixing plate (51). The alarm mechanism (10) includes a voltage sensor (101) and an alarm (102). The voltage sensor (101) is fixed to the fixing plate (51). The voltage sensor (101) is electrically connected to the phase assembly (3). The voltage sensor (101) is fixed to the alarm (102). The voltage sensor (101) and the alarm (102) are electrically connected.

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