CN212323515U - High-reliability distributed terminal ring net cage - Google Patents

Abstract

The utility model discloses a high-reliability distributed terminal ring net cage, which is divided into three layers, wherein the lowest layer is provided with a first load switch cable chamber, a second load switch cable chamber, a third load switch cable chamber, a first breaker cable chamber and a second breaker cable chamber in sequence from a first side to a second side; the middle layer is distributed with a first load switch mechanism chamber, a second load switch mechanism chamber, a third load switch common box instrument chamber, a first common terminal control chamber, a second common terminal control chamber, a third common terminal control chamber, a first breaker mechanism chamber and a second breaker mechanism chamber, the uppermost layer is sequentially distributed with a first load switch common box instrument chamber unit, a second load switch common box instrument chamber unit, a first breaker common box instrument chamber unit and a second breaker common box instrument chamber unit from the first side to the second side, the first load switch common box instrument chamber unit, the second load switch common box instrument chamber unit, the first breaker common box instrument chamber unit and the second breaker common box instrument chamber unit are all provided with distribution terminals, a partial discharge monitoring host is arranged in the first common terminal control chamber, and the. The utility model discloses long service life, the structure principle is succinct, safe and reliable. The failure rate of the equipment during operation can be effectively reduced, and the equipment can be prevented and controlled in time.

Description

High-reliability distributed terminal ring net cage

Technical Field

The utility model relates to a well low voltage distribution network equipment specifically is a high reliable distributed terminal ring box with a net.

Background

The Ring Main Unit (Ring Main Unit) is an electrical device in which a group of transmission and distribution electrical equipment (high-voltage switch equipment) is arranged in a metal or nonmetal insulating box body or is made into an assembled interval type Ring Main power supply Unit, and has wide application range and large market share in each power grid device.

The traditional ring net cage has the following problems:

1) traditional ring net cage equipment uses centralized DTU usually, and the terminal wiring is used to the terminal inside, and the fault point is many, and the field communication is troublesome and bulky, leads to the increase of looped netowrk case body area. Too high fault rate also exists in looped netowrk case body:

2) due to the complexity of the outdoor environment, the protection grade of the cabinet body is not enough, and condensation is easily generated in the cabinet. The secondary element is exposed and is easy to be affected with damp to cause the bad phenomena of the non-communication of signal contact points and the like; through the cable hole and the position of the shutter, moisture in the air enters the cabinet, and a transmission part of the mechanism is exposed for a long time, so that the mechanism is rusted and jammed.

At present, in order to ensure safe operation of equipment, all power companies organize teams and groups to carry out live-line inspection maintenance on the equipment, field measurement is carried out through devices such as field infrared temperature measurement and partial discharge detection, and normal operation of the equipment is judged by utilizing the data. But the faults are often sudden, and regular maintenance and live detection are difficult to eradicate and find hidden equipment hazards in time.

The appearance of the mature technologies such as microelectronics, communication, sensors, the Internet of things and distributed terminals in the current market is combined, and meanwhile, the application of the power distribution Internet of things in the power distribution field is widely realized for promoting the target requirement of the construction strategy of 'three types and two networks' of the national network company. The market urgently needs a highly reliable distributed ring main unit to reduce the utilization of urban land and ensure the reliability of equipment and the stability of a power grid system.

SUMMERY OF THE UTILITY MODEL

To the not enough department of the above-mentioned that exists among the traditional looped netowrk cabinet, the utility model aims at reducing the fault rate of looped netowrk case equipment to reduce through real-time supervision and patrol and examine the manpower and materials of maintaining the consumption, and provide a high reliable distributed terminal ring box with a net, this high reliable distributed terminal ring box with a net reasonable in design can effectual saving, optimize the utilization of land resource.

The utility model provides a technical problem can adopt following technical scheme to realize:

a high-reliability distributed terminal ring net cage is divided into three layers, wherein a first load switch cable chamber, a second load switch cable chamber, a third load switch cable chamber, a first breaker cable chamber and a second breaker cable chamber are sequentially arranged on the lowest layer from a first side to a second side; a first load switch mechanism chamber, a second load switch mechanism chamber, a third load switch mechanism chamber, a first public terminal control chamber, a second public terminal control chamber, a third public terminal control chamber, a first breaker mechanism chamber and a second segment of circuit mechanism chamber are distributed on the middle layer, wherein the first load switch mechanism chamber, the second load switch mechanism chamber and the third load switch mechanism chamber are respectively positioned right above the first load switch cable chamber, the second load switch cable chamber and the third load switch cable chamber, the first public terminal control chamber, the second public terminal control chamber and the third public terminal control chamber are respectively positioned right above the first load switch mechanism chamber, the second load switch mechanism chamber and the third load switch mechanism chamber, and the first breaker mechanism chamber and the second breaker mechanism chamber are respectively positioned right above the first breaker cable chamber and the third load switch mechanism chamber, The cable chamber of the second circuit breaker is right above; a first load switch common-box instrument room unit, a second load switch common-box instrument room unit, a third load switch common-box instrument room unit, a first breaker common-box instrument room unit and a second breaker common-box instrument room unit are sequentially arranged on the uppermost layer from the first side to the second side, wherein the first load switch common-box instrument room unit, the second load switch common-box instrument room unit and the third load switch common-box instrument room unit are respectively positioned right above the first common terminal control room, the second common terminal control room and the third common terminal control room, and the first breaker common-box instrument room unit and the second breaker common-box instrument room unit are respectively positioned right above the first breaker mechanism room and the second breaker mechanism room; first load switch is total to case instrument room unit, second load switch is total to case instrument room unit, third load switch is total to case instrument room unit, first circuit breaker is total to case instrument room unit and second circuit breaker and is total to case instrument room unit and all install distribution terminal be provided with the local in the first public terminal control room and put monitoring host computer, the local is put monitoring host computer and all distribution terminal signal connection.

In a preferred embodiment of the present invention, an ONJ and an ODF device are further disposed in the first common terminal control room, and the partial discharge monitoring host is connected to all the distribution terminals through the ONJ and the ODF device.

In a preferred embodiment of the present invention, a noise sensor is disposed outside any one of the box walls of the highly reliable distributed terminal ring net cage for monitoring the operation noise of the highly reliable distributed terminal ring net cage, the noise sensor is connected to the local discharge monitoring host through the ONJ and ODF devices.

In a preferred embodiment of the present invention, the system further comprises a display terminal, wherein the display terminal is connected to the partial discharge monitoring host.

The utility model discloses a preferred embodiment, each distribution terminal all puts monitoring module including the office that has the UHF sensor, can show each monitoring point partial discharge amplitude, frequency in real time, confirm the discharge point relative position, gives the warning when necessary, in time discovers the insulating defect in the cabinet to for assessing its insulation level and ageing degree provides the criterion, provides the foundation for patrolling and examining work.

In a preferred embodiment of the present invention, each distribution terminal includes a plurality of wireless passive temperature sensors disposed on cable terminal connectors in the first load switch common-box instrument room unit, the second load switch common-box instrument room unit, the third load switch common-box instrument room unit, the first circuit breaker common-box instrument room unit, and the second circuit breaker common-box instrument room unit; a partial discharge temperature detection device is arranged in the third public terminal control room, all wireless passive temperature sensors are in protocol networking with the partial discharge temperature detection device through a 485 bus, and meanwhile, the partial discharge temperature detection device is communicated with a partial discharge monitoring host; the temperature of the cable is monitored in real time, and the alarm temperature can be set through the partial discharge monitoring host, so that the high-temperature alarm function is realized. Can effectively prevent to meet the cable installation and lack the generating heat that the standard arouses, avoid causing economic loss.

In a preferred embodiment of the present invention, the first load switch common-box instrument room unit, the second load switch common-box instrument room unit, the third load switch common-box instrument room unit, the first breaker common-box instrument room unit and the second breaker common-box instrument room unit all include a totally closed secondary compartment, an aviation plug switching compartment and an outlet room, the aviation plug switching compartment is located between the totally closed secondary compartment and the outlet room, a totally-enclosed instrument room partition plate is arranged between the totally-enclosed secondary compartment and the aerial plug switching compartment, the incoming lines of the totally-enclosed secondary compartment are connected in a switching way through the waterproof connector of the instrument room, the outgoing lines of the totally-enclosed secondary compartment are connected with the incoming lines in the aerial plug switching compartment in a switching way through the aerial plug, the outgoing line of the switch control unit in the outgoing line chamber is sealed by the switch control unit, and the outgoing line of the distribution terminal in the outgoing line chamber is inserted by the distribution terminal.

In a preferred embodiment of the present invention, a lithium iron phosphate battery is disposed in the second common terminal control room, and a partial discharge temperature detection device and a capacitor charging real switching power supply are disposed in the third common terminal control room; the lithium iron phosphate battery and the capacitor charging real switching power supply jointly supply power to the partial discharge monitoring host, all the distribution terminals and the partial discharge temperature detection device.

In a preferred embodiment of the present invention, a PT is installed in the first load switch cable chamber, and a PT operating mechanism is installed in the first load switch mechanism chamber, and the PT operating mechanism operates the PT.

In a preferred embodiment of the present invention, a load switch operating mechanism is disposed in each of the second load switch cable chamber and the third load switch cable chamber; a circuit breaker operating mechanism and a disconnecting switch operating mechanism are arranged in the first circuit breaker mechanism chamber and the second circuit breaker mechanism chamber, wherein the circuit breaker operating mechanisms are positioned above the disconnecting switch operating mechanisms and are linked with each other, and the load switch operating mechanism, the circuit breaker operating mechanism and the disconnecting switch operating mechanism are respectively and completely sealed in a box body; the operation parts of the load switch operation mechanism, the breaker operation mechanism and the isolating switch operation mechanism are processed by full sealing rings, can reach the IP67 grade, and can play the roles of water resistance and moisture resistance.

In a preferred embodiment of the present invention, an incoming cable chamber, a pressure relief channel and a condensation dehumidifier are disposed in each of the second load switch cable chamber, the third load switch cable chamber, the first breaker cable chamber and the second breaker cable chamber.

Owing to adopted above-mentioned technical scheme, the utility model discloses compare with current looped netowrk cabinet, have following advantage:

one) sealing mechanism dampproofing prevent congealing, and the navigation is inserted and is connected highly reliably.

1) The load switch operating mechanism, the breaker operating mechanism and the isolating switch operating mechanism are respectively sealed in a box body; the operation parts of the load switch operation mechanism, the breaker operation mechanism and the isolating switch operation mechanism are processed by full sealing rings, can reach the IP67 grade, and can play the roles of water resistance and moisture resistance.

2) Load switch is total to case instrument room unit, second load switch is total to case instrument room unit, third load switch is total to case instrument room unit, first circuit breaker is total to case instrument room unit and second circuit breaker all circuits in the case instrument room unit all receive inside aviation socket and the waterproof joint that corresponds, all cancelled traditional terminal wiring, only need the outside to insert corresponding navigation plug can use, the convenient easy operation of wiring. Meanwhile, intermediate fault points are reduced, and the integrity is strong. If the elements are damaged and need to be replaced, the aviation plug can be replaced by unscrewing, and the power failure time of field maintenance is greatly reduced.

3) Load switch is total to case instrument room unit, the case instrument room unit is total to the second load switch, the case instrument room unit is total to the third load switch, the case instrument room unit is total to first circuit breaker and the case instrument room unit is total to the second circuit breaker all adopt the effectual entering of blocking vapor in confined secondary compartment, prevent the formation of condensation, prevent that condensation from dripping and causing the short circuit in secondary circuit at the terminal, arouse the erroneous judgement at terminal to improve secondary element's life.

And thirdly) monitoring all data in real time to prevent the data from happening.

1) Each branch terminal uses the partial discharge monitoring module of the ultrahigh frequency sensor, can display the partial discharge amplitude and frequency of each monitoring point in real time, determine the relative position of the discharge point, give an alarm if necessary, find the insulation defect in the cabinet in time, provide a criterion for evaluating the insulation level and the aging degree of the cabinet and provide a basis for routing inspection work.

2) The cable terminal joint of each branch terminal is provided with a wireless passive temperature sensor; all the wireless passive temperature sensors are in protocol networking with the partial discharge temperature detection device through a 485 bus, and meanwhile, the partial discharge temperature detection device is communicated with a partial discharge monitoring host; the temperature of the cable is monitored in real time, and the alarm temperature can be set through the partial discharge monitoring host, so that the high-temperature alarm function is realized. Can effectively prevent to meet the cable installation and lack the generating heat that the standard arouses, avoid causing economic loss.

And fourthly), the intelligent distribution terminal is compact, saves space and is in aerial plug connection.

1) The distributed terminal has the functions of holographic sensing and edge calculation besides acquiring the conventional current and voltage quantity, senses partial discharge and temperature information in real time, automatically checks the acquired voltage and current to realize the functions of line fault automatic processing and edge calculation, and supports the access of the Internet of things MQTT.

2) The distribution terminal is installed the first load switch is total to case instrument room unit, the second load switch is total to case instrument room unit, the third load switch is total to case instrument room unit, first circuit breaker is total to case instrument room unit and the second circuit breaker is total to case instrument room unit can, compare with the centralized terminal of tradition and can save 600mm mounted position.

The utility model discloses long service life, the structure principle is succinct, safe and reliable. The failure rate of the equipment during operation can be effectively reduced, and the equipment can be prevented and controlled in time.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is the utility model discloses high reliable distributed terminal ring box with a net overall structure sketch map.

Fig. 2 is the internal structure schematic diagram of the highly reliable distributed terminal ring net cage of the utility model.

Fig. 3 is the utility model discloses first load switch in the high reliable distributed terminal looped netowrk case is case instrument room unit altogether, second load switch is case instrument room unit altogether, third load switch is case instrument room unit altogether, first circuit breaker is case instrument room unit altogether and second circuit breaker is case instrument room unit structure sketch map altogether.

Detailed Description

In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.

Referring to fig. 1 and 2, the highly reliable distributed termination ring net cage shown in the figures is divided into three layers, wherein a first load switch cable chamber 10, a second load switch cable chamber 20, a third load switch cable chamber 30, a first breaker cable chamber 40 and a second breaker cable chamber 50 are arranged in sequence from a first side to a second side on the lowest layer. A PT 11 is installed in the first load switch cable chamber 10, and inlet cable chambers, relief passages 21, 31, 41, 51, and condensation dehumidifiers 22, 32, 42, 52 are provided in the second load switch cable chamber 20, the third load switch cable chamber 30, the first breaker cable chamber 40, and the second breaker cable chamber 50.

A first load switch mechanism chamber 60, a second load switch mechanism chamber 70, a third load switch mechanism chamber 80, a first public terminal control chamber 90, a second public terminal control chamber 100, a third public terminal control chamber 110, a first breaker mechanism chamber 120 and a second circuit breaker mechanism chamber 130 are distributed in the middle layer, the first load switch mechanism chamber 60, the second load switch mechanism chamber 70 and the third load switch mechanism chamber 80 are respectively positioned right above the first load switch cable chamber 10, the second load switch cable chamber 20 and the third load switch cable chamber 30, the first public terminal control chamber 90, the second public terminal control chamber 10 and the third public terminal control chamber 110 are respectively positioned right above the first load switch mechanism chamber 60, the second load switch mechanism chamber 70 and the third load switch mechanism chamber 80, the first breaker mechanism chamber 120 and the second breaker mechanism chamber 130 are respectively positioned right above the first breaker cable chamber 40, the second breaker mechanism chamber 40 and the second breaker mechanism chamber 130, Directly above the second breaker cable compartment 50.

A PT operating mechanism 61 is provided in the first load switching mechanism chamber 60, and the PT operating mechanism 61 operates the PT 11.

Load switch operating mechanisms 71, 81 are provided in both the second load switch cable chamber 70 and the third load switch cable chamber 80; the first circuit breaker mechanism chamber 120 and the second circuit breaker mechanism chamber 130 are provided with circuit breaker operating mechanisms 121, 131 and disconnector operating mechanisms 122, 132, wherein the circuit breaker operating mechanisms 121, 131 are located above the disconnector operating mechanisms 122, 132 and are interlocked with each other, and the load switch operating mechanisms 71, 81, the circuit breaker operating mechanisms 121, 131 and the disconnector operating mechanisms 122, 132 are respectively sealed in a box; the operation parts of the load switch operation mechanisms 71 and 81, the breaker operation mechanisms 121 and 131 and the isolating switch operation mechanisms 122 and 132 are processed by full sealing rings, can reach IP67 grade, and can play a role in water and moisture prevention.

A first load switch common-box instrument room unit 140, a second load switch common-box instrument room unit 150, a third load switch common-box instrument room unit 160, a first breaker common-box instrument room unit 170 and a second breaker common-box instrument room unit 180 are sequentially arranged on the uppermost layer from the first side to the second side, wherein the first load switch common-box instrument room unit 140, the second load switch common-box instrument room unit 150 and the third load switch common-box instrument room unit 160 are respectively positioned right above the first common terminal control room 90, the second common terminal control room 100 and the third common terminal control room 110, and the first breaker common-box instrument room unit 160 and the second breaker common-box instrument room unit 170 are respectively positioned right above the first breaker mechanism room 120 and the second breaker mechanism room 130.

The first load switch common-box instrument room unit 140, the second load switch common-box instrument room unit 150, the third load switch common-box instrument room unit 160, the first breaker common-box instrument room unit 170 and the second breaker common-box instrument room unit 180 are all provided with distribution terminals 141, 151, 161, 171 and 181, the first common terminal control room 90 is internally provided with an partial discharge monitoring host 91 and an ONJ and ODF device 92, and the partial discharge monitoring host 91 is in signal connection with all the distribution terminals 141, 151, 161, 171 and 181 through the ONJ and ODF device 92.

A noise sensor (not shown in the figure) is arranged on the outer side of any box wall of the high-reliability distributed terminal ring net box for monitoring the operation noise of the high-reliability distributed terminal ring net box, and the noise sensor is in signal connection with the partial discharge monitoring host 91 through the ONJ and ODF device 92.

The utility model discloses a high reliable distributed terminal ring box with a net still includes a display terminal (not shown in the figure), and this display terminal is connected with partial discharge monitoring host 91.

A lithium iron phosphate battery 101 is arranged in the second common terminal control room 100, and a partial discharge temperature detection device 111 and a capacitor charging real switching power supply 112 are arranged in the third common terminal control room 110; the lithium iron phosphate battery 101 and the capacitor charging real switching power supply 111 jointly supply power to the partial discharge monitoring host 91, all the distribution terminals 141, 151, 161, 171 and 181 and the partial discharge temperature detection device 111.

Each distribution terminal 141, 151, 161, 171, 181 includes a partial discharge monitoring module (not shown in the figure) with a UHF sensor, and can display the partial discharge amplitude and frequency of each monitoring point in real time, determine the relative position of the discharge point, give an alarm if necessary, find the insulation defect in the cabinet in time, provide a criterion for evaluating the insulation level and the aging degree of the cabinet, and provide a basis for routing inspection work.

Each distribution terminal 141, 151, 161, 171, 181 includes a plurality of wireless passive temperature sensors (not shown in the figure) disposed at cable terminal connections in the first load switch common-box instrument room unit 140, the second load switch common-box instrument room unit 150, the third load switch common-box instrument room unit 160, the first breaker common-box instrument room unit 170, and the second breaker common-box instrument room unit 180; all the wireless passive temperature sensors are in protocol networking with the partial discharge temperature detection device 111 through a 485 bus, and meanwhile, the partial discharge temperature detection device 111 is in communication with the partial discharge monitoring host 91; the temperature of the cable is monitored in real time, and the alarm temperature can be set through the partial discharge monitoring host 91, so that the high-temperature alarm function is realized. Can effectively prevent to meet the cable installation and lack the generating heat that the standard arouses, avoid causing economic loss.

Referring to fig. 3, the first load switch common-box instrument room unit 140, the second load switch common-box instrument room unit 150, the third load switch common-box instrument room unit 160, the first breaker common-box instrument room unit 170 and the second breaker common-box instrument room unit 180 all include a totally closed secondary compartment a, an aviation plug switching compartment B and an outlet compartment C, the aviation plug switching compartment B is located between the totally closed secondary compartment a and the outlet compartment C, an instrument room totally-enclosed partition plate D is arranged between the totally-enclosed secondary compartment A and the aerial plug switching compartment B, incoming lines of the totally-enclosed secondary compartment A are switched through an instrument room waterproof connector E, outgoing lines A1 of the totally-enclosed secondary compartment A are switched with incoming lines B1 in the aerial plug switching compartment B through an aerial plug F, outgoing lines C1 of a switch control unit in the outgoing line chamber C are led out through a switch control unit sealed outgoing line device C2, and outgoing lines C3 of a distribution terminal in the outgoing line chamber C are led out through a distribution terminal aerial plug C4.

Claims (11)

1. A high-reliability distributed terminal ring net cage is characterized by being divided into three layers, wherein a first load switch cable chamber, a second load switch cable chamber, a third load switch cable chamber, a first breaker cable chamber and a second breaker cable chamber are sequentially arranged on the lowest layer from a first side to a second side; a first load switch mechanism chamber, a second load switch mechanism chamber, a third load switch mechanism chamber, a first public terminal control chamber, a second public terminal control chamber, a third public terminal control chamber, a first breaker mechanism chamber and a second segment of circuit mechanism chamber are distributed on the middle layer, wherein the first load switch mechanism chamber, the second load switch mechanism chamber and the third load switch mechanism chamber are respectively positioned right above the first load switch cable chamber, the second load switch cable chamber and the third load switch cable chamber, the first public terminal control chamber, the second public terminal control chamber and the third public terminal control chamber are respectively positioned right above the first load switch mechanism chamber, the second load switch mechanism chamber and the third load switch mechanism chamber, and the first breaker mechanism chamber and the second breaker mechanism chamber are respectively positioned right above the first breaker cable chamber and the third load switch mechanism chamber, The cable chamber of the second circuit breaker is right above; a first load switch common-box instrument room unit, a second load switch common-box instrument room unit, a third load switch common-box instrument room unit, a first breaker common-box instrument room unit and a second breaker common-box instrument room unit are sequentially arranged on the uppermost layer from the first side to the second side, wherein the first load switch common-box instrument room unit, the second load switch common-box instrument room unit and the third load switch common-box instrument room unit are respectively positioned right above the first common terminal control room, the second common terminal control room and the third common terminal control room, and the first breaker common-box instrument room unit and the second breaker common-box instrument room unit are respectively positioned right above the first breaker mechanism room and the second breaker mechanism room; first load switch is total to case instrument room unit, second load switch is total to case instrument room unit, third load switch is total to case instrument room unit, first circuit breaker is total to case instrument room unit and second circuit breaker and is total to case instrument room unit and all install distribution terminal be provided with the local in the first public terminal control room and put monitoring host computer, the local is put monitoring host computer and all distribution terminal signal connection.

2. The highly reliable distributed terminal ring net cage according to claim 1, wherein an ONJ and ODF device is further disposed in the first common terminal control room, and the partial discharge monitoring host is in signal connection with all the distributed terminals through the ONJ and ODF devices.

3. The highly reliable distributed terminal ring net cage according to claim 2, wherein a noise sensor is disposed on an outer side of any one of the walls of the highly reliable distributed terminal ring net cage for monitoring operation noise of the highly reliable distributed terminal ring net cage, and the noise sensor is in signal connection with the partial discharge monitoring host through the ONJ and ODF devices.

4. The highly reliable distributed terminal ring cage as recited in claim 1, further comprising a display terminal, said display terminal being connected to said partial discharge monitoring host.

5. The highly reliable distributed terminal ring net cage according to any one of claims 1 to 4, wherein each distributed terminal comprises a partial discharge monitoring module with UHF sensor, which can display the partial discharge amplitude and frequency of each monitoring point in real time, determine the relative position of the discharge point, give an alarm if necessary, find the insulation defect in the cabinet in time, provide a criterion for evaluating the insulation level and aging degree of the cabinet, and provide a basis for inspection work.

6. The highly reliable distributed terminal ring cage as recited in claim 5, wherein each distribution terminal comprises a plurality of wireless passive temperature sensors disposed at the cable terminal connections of the first load switch common enclosure instrument room unit, the second load switch common enclosure instrument room unit, the third load switch common enclosure instrument room unit, the first breaker common enclosure instrument room unit and the second breaker common enclosure instrument room unit; a partial discharge temperature detection device is arranged in the third public terminal control room, all wireless passive temperature sensors are in protocol networking with the partial discharge temperature detection device through a 485 bus, and meanwhile, the partial discharge temperature detection device is communicated with a partial discharge monitoring host; the temperature of the cable is monitored in real time, and the alarm temperature can be set through the partial discharge monitoring host, so that the high-temperature alarm function is realized.

7. The highly reliable distributed terminal ring net cage of claim 6, wherein the first load switch common box instrument room unit, the second load switch common box instrument room unit, the third load switch common box instrument room unit, the first breaker common box instrument room unit and the second breaker common box instrument room unit each comprise a totally closed secondary compartment, an aerial plug transfer compartment and an outlet compartment, the aerial plug transfer compartment is located between the totally closed secondary compartment and the outlet compartment, a totally closed partition board of the instrument compartment is arranged between the totally closed secondary compartment and the aerial plug transfer compartment, the inlet wire of the totally closed secondary compartment is transferred through a waterproof connector of the instrument compartment, the outlet wire of the totally closed secondary compartment is transferred through the aerial plug with the inlet wire in the aerial plug transfer compartment, the outlet wire of the switch control unit in the outlet compartment is sealed by a switch control unit and the outlet wire device is led out, and the distribution terminal outgoing lines in the outgoing line chamber are inserted out through the distribution terminals.

8. The highly reliable distributed terminal ring net cage of claim 7, wherein a lithium iron phosphate battery is disposed in the second common terminal control room, and a partial discharge temperature detection device and a capacitive charge solid switching power supply are disposed in the third common terminal control room; the lithium iron phosphate battery and the capacitor charging real switching power supply jointly supply power to the partial discharge monitoring host, all the distribution terminals and the partial discharge temperature detection device.

9. The highly reliable distributed terminal ring cage as claimed in claim 8, wherein a PT is installed in said first load switch cable compartment, and a PT operating mechanism is installed in said first load switch mechanism compartment, said PT operating mechanism operating said PT.

10. The highly reliable distributed terminal ring cage of claim 9, wherein load switch operating mechanisms are provided in both said second load switch cable compartment and said third load switch cable compartment; a circuit breaker operating mechanism and a disconnecting switch operating mechanism are arranged in the first circuit breaker mechanism chamber and the second circuit breaker mechanism chamber, wherein the circuit breaker operating mechanisms are positioned above the disconnecting switch operating mechanisms and are linked with each other, and the load switch operating mechanism, the circuit breaker operating mechanism and the disconnecting switch operating mechanism are respectively and completely sealed in a box body; the operation parts of the load switch operation mechanism, the breaker operation mechanism and the isolating switch operation mechanism are processed by full sealing rings, can reach the IP67 grade, and can play the roles of water resistance and moisture resistance.

11. The highly reliable distributed terminal ring cage of claim 10, wherein incoming cable compartments, pressure relief channels and a condensate dehumidifier are provided in the second load switch cable compartment, the third load switch cable compartment, the first breaker cable compartment and the second breaker cable compartment.

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