CN112017905B - Quick-acting type magnetic control vacuum circuit breaker - Google Patents
Quick-acting type magnetic control vacuum circuit breaker Download PDFInfo
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- CN112017905B CN112017905B CN202011041796.7A CN202011041796A CN112017905B CN 112017905 B CN112017905 B CN 112017905B CN 202011041796 A CN202011041796 A CN 202011041796A CN 112017905 B CN112017905 B CN 112017905B
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/02—Details
- H01H33/46—Interlocking mechanisms
- H01H33/52—Interlocking mechanisms for interlocking two or more switches
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/666—Operating arrangements
- H01H33/6661—Combination with other type of switch, e.g. for load break switches
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/02—Housings; Casings; Bases; Mountings
- H01H71/0207—Mounting or assembling the different parts of the circuit breaker
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/04—Means for indicating condition of the switching device
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H33/00—High-tension or heavy-current switches with arc-extinguishing or arc-preventing means
- H01H33/60—Switches wherein the means for extinguishing or preventing the arc do not include separate means for obtaining or increasing flow of arc-extinguishing fluid
- H01H33/66—Vacuum switches
- H01H33/662—Housings or protective screens
- H01H33/66207—Specific housing details, e.g. sealing, soldering or brazing
- H01H2033/66223—Details relating to the sealing of vacuum switch housings
Landscapes
- Gas-Insulated Switchgears (AREA)
- High-Tension Arc-Extinguishing Switches Without Spraying Means (AREA)
Abstract
The invention designs a quick-acting magnetic control vacuum circuit breaker which comprises an isolating switch assembly, a solid sealing pole assembly, a magnetic control mechanism and a box body assembly, wherein the solid sealing pole assembly is arranged on the box body assembly; the isolating switch assembly comprises a movable blade, a static blade and an operating handle, wherein the operating handle is used for controlling the movement of the movable blade, so that the movable blade is communicated with or disconnected from the static blade to realize switching on or off; the solid-sealed pole component is used for realizing the transmission of the magnetic control mechanism and the isolating switch component; the magnetic control mechanism is used for driving the movable blade to move, so that the movable blade is communicated with or disconnected from the static blade to realize switching on or switching off; the inside magnetic control mechanism that sets up of box subassembly, upper portion sets up seal utmost point post subassembly admittedly. The solid-sealed polar pole is miniaturized, and is internally provided with a voltage sensor, a current sensor and a vacuum arc-extinguishing chamber, so that the functions are comprehensive; the magnetic control operating mechanism is adopted, so that the power consumption is low, the brake separating speed is high, and the performance is reliable. The whole machine has small volume, light weight, low power consumption, convenient installation and convenient maintenance.
Description
Technical Field
The invention relates to the technical field of circuit breakers, in particular to a quick-acting type magnetic control vacuum circuit breaker.
Background
The 10kV distribution network vacuum circuit breaker in the current market has various structural forms, mainly comprises 2 types of common box type and support column type, and the operating mechanism mainly comprises a spring operating mechanism, an electromagnetic operating mechanism and a permanent magnet operating mechanism. The vacuum circuit breaker adopting the spring mechanism has larger opening time which is generally more than 20ms; the vacuum circuit breaker adopting the common electromagnetic operating mechanism or the permanent magnetic operating mechanism has high operation power consumption; along with the increasing of the power grid load, the vacuum circuit breaker on the line is required to be capable of rapidly cutting off the line fault on site, so that the influence of the line fault on equipment is reduced, and the fault power failure time is shortened; meanwhile, the circuit breaker is required to integrate a voltage sensor and a current sensor, is miniaturized, is light in weight, low in power consumption, can expand and use a capacitor energy-taking power supply, can measure line loss, and is convenient to maintain due to deep integration of secondary equipment and the like.
Part of manufacturers integrate a current sensor into a pole, and externally integrate a voltage sensor into an outlet terminal; the voltage sensor has the advantages that the high-voltage arm of the voltage sensor adopts a thin film capacitor, the temperature drift is high, the voltage sensor is easily influenced by the environmental temperature, the reliability is low, but the output precision is high at normal temperature; the current sensor uses a conventional silicon steel iron core, the output precision is low, but the saturation characteristic level is high, and the measurement and protection are difficult to realize integrated design; the operating mechanism adopts a conventional monostable or bistable permanent magnet operating mechanism, and the operating power consumption is high. The whole volume is big, weight is big, and it is relatively troublesome to maintain.
The existing strut type circuit breaker mostly adopts a single fracture structure, an external integrated zero sequence voltage sensor and an isolating switch are complex in overall structure, large in size, heavy in weight, low in overall reliability and single in function.
Disclosure of Invention
The invention discloses a quick-acting magnetic control vacuum circuit breaker based on market demands, which adopts a strut type structural design and mainly comprises a solid sealing polar pole, a box body, a magnetic control mechanism and an isolating switch component. The solid-sealed polar pole is miniaturized, and a voltage sensor, a current sensor and a vacuum arc-extinguishing chamber are arranged in the solid-sealed polar pole, so that the solid-sealed polar pole has rich functions; the mechanism adopts an advanced magnetic control operation mechanism, has low power consumption, high brake separating speed and reliable performance; the isolating switch assembly can be freely integrated, a reliable interlocking structure is arranged between the circuit breaker and the isolating switch, and the five-prevention design requirement is met. The whole machine has small volume, light weight, low power consumption, convenient installation and convenient maintenance.
In order to achieve the above purpose, the invention provides a quick-action type magnetic control vacuum circuit breaker, which comprises an isolating switch component, a solid sealing pole component, a magnetic control mechanism and a box body component;
The isolating switch assembly comprises a movable blade, a static blade, an isolating switch insulation pull rod and an operating handle, wherein the operating handle is used for controlling the isolating switch insulation pull rod to drive the movable blade to move, so that the movable blade is communicated with or disconnected from the static blade to realize switching-on or switching-off of the isolating switch;
The solid-sealed pole assembly is used for casting and integrating the arc extinguishing chamber, the voltage and current sensor and the solid-sealed pole assembly, and is used as a core breaking unit and a voltage and current signal acquisition unit of the circuit breaker;
The magnetic control mechanism is connected with the moving contact of the arc extinguish chamber through the insulating pull rod of the circuit breaker, and the moving iron core of the mechanism is driven to move by energizing and demagnetizing the coil in the magnetic control mechanism, so that the insulating pull rod of the circuit breaker is driven to enable the moving contact of the arc extinguish chamber to be communicated with or disconnected from the fixed contact, and the switching-on or switching-off operation of the circuit breaker is realized; in the closing state of the circuit breaker, the external force can be manually applied to the magnetic control mechanism to separate the movable iron core from the static iron core of the magnetic control mechanism, and the insulating pull rod of the circuit breaker is driven to disconnect the movable contact of the arc extinguishing chamber from the static contact, so that the manual opening operation of the circuit breaker is realized;
The inside magnetic control mechanism that sets up of box subassembly, upper portion sets up seal the utmost point post subassembly admittedly for seal utmost point post subassembly support, the protection of the inside transmission structure of circuit breaker and circuit breaker on-off state show.
Further, the isolating switch assembly further comprises an insulating support column, an isolating switch insulating pull rod and a base; the insulation support is used for supporting the static blade, and the isolating switch insulation pull rod is used for supporting the movable blade; the insulation support is fixed on the base, the operating handle is mounted on the base, and the operating handle drives the insulation pull rod of the isolating switch to rotate the movable blade of the isolating switch through the isolating spindle, so that the opening and closing operations of the isolating switch are realized.
Further, the movable blade and the static blade are made of red copper, and the surfaces of the movable blade and the static blade are plated with silver and tin; the insulating support and the insulating pull rod of the isolating switch consist of epoxy resin, silicon rubber and copper inserts, the inside is epoxy resin, the surface is made of silicon rubber to form an umbrella skirt structure, and copper inserts for bolt installation are arranged at two ends of the umbrella skirt structure; the operating handle and the base are made of stainless steel or carbon steel.
Further, the isolating switch assembly is connected with the box body assembly through the switch base, the box body assembly is assembled and fastened with the solid-sealed pole assembly through 4 mounting bolts of the magnetic control mechanism to form a breaker module, an interlocking structure is arranged between the breaker module and the isolating switch assembly, the isolating switch is prevented from being opened and closed when the breaker is closed, and the isolating switch is allowed to be opened and closed when the breaker is opened.
Further, the solid-sealed pole assembly comprises an epoxy resin insulator, a vacuum arc-extinguishing chamber, a voltage/current sensor, an outgoing line terminal, a conducting rod, a flexible connection and an insulating pull rod;
The epoxy resin insulator is fixed to the box body assembly, and the voltage/current sensor, the vacuum arc-extinguishing chamber and the conducting rod are fixedly sealed inside the box body assembly;
The vacuum arc-extinguishing chamber is used for switching on or off load current and fault current generated by a ground fault or a short circuit fault of a disconnected line;
One end of the insulating pull rod is connected to the vacuum arc-extinguishing chamber, the moving contact of the arc-extinguishing chamber is connected to the conducting rod through soft connection, and the other end of the insulating pull rod is connected to the magnetic control mechanism through the metal pull rod;
The voltage/current sensor is fixedly sealed and integrated on one side of the epoxy resin insulator, detects the voltage or current flowing through the conducting rod, and is led out through the outlet terminal.
Further, the inside of the insulating pull rod is carbon steel, and the outside of the insulating pull rod is wrapped with SMC insulating materials.
Further, the outgoing terminal is forged by red copper, and the surface of the outgoing terminal is plated with silver or tin and is used for being connected with the main loop wire of the overhead line.
Further, a magnetic control mechanism is adopted, and a memory alloy material is adopted as a mechanism iron core.
Furthermore, the box body component is provided with an aviation socket, pins of a power supply control loop are led out, and switching on or switching off of the mechanism is realized by applying a switching-on power supply or a switching-off power supply to the magnetic control mechanism.
Further, the box body assembly is further provided with a travel switch, an EVT compensation module, an opening and closing pointer, an ETC compensation module, a grounding indication board, a handle and a lifting hook;
The travel switch is used for outputting a switching position signal of the circuit breaker; the EVT compensation module is used for outputting a voltage signal; the ETC compensation module is used for outputting a current signal; the opening and closing pointer is used for indicating the opening and closing state of the breaker; the grounding indication board is used for indicating whether the grounding is carried out or not; the handle and the lifting hook are welded on two sides of the box body.
The technical scheme of the invention has the following beneficial technical effects:
(1) The invention discloses a quick-acting magnetic control vacuum circuit breaker based on market demands, which adopts a strut type structural design and mainly comprises a solid sealing polar pole, a box body, a magnetic control mechanism and an isolating switch component. The solid-sealed polar pole is miniaturized, and a voltage sensor, a current sensor and a vacuum arc-extinguishing chamber are arranged in the solid-sealed polar pole, so that the solid-sealed polar pole has rich functions; the mechanism adopts an advanced magnetic control operation mechanism, has low power consumption, high brake separating speed and reliable performance; the isolating switch assembly can be freely integrated, a reliable interlocking structure is arranged between the circuit breaker and the isolating switch, and the five-prevention design requirement is met. The whole machine has small volume, light weight, low power consumption, convenient installation and convenient maintenance.
(2) The invention integrates the phase sequence-zero sequence integrated voltage sensor and the phase sequence-zero sequence integrated current sensor, realizes the voltage and current measurement and protection integrated design and application, improves the voltage and current measurement precision and measurement range, and enriches the functions of the breaker body; the integrated low-power consumption magnetic control operating mechanism realizes the quick switching-off function of the circuit breaker and prolongs the operating life of the circuit breaker.
(3) The circuit breaker disclosed by the invention is small in structure, and solves the problems of large whole volume, heavy weight, difficult installation and difficult operation and maintenance of the traditional circuit breaker;
Drawings
Fig. 1 is a front view of a snap-action magnetic control vacuum circuit breaker.
Fig. 2 is a right side view of the snap-action magnetic control vacuum circuit breaker.
Fig. 3 is an electrical schematic diagram of a fast-type magnetic control vacuum circuit breaker.
Detailed Description
The objects, technical solutions and advantages of the present invention will become more apparent by the following detailed description of the present invention with reference to the accompanying drawings. It should be understood that the description is only illustrative and is not intended to limit the scope of the invention. In addition, in the following description, descriptions of well-known structures and techniques are omitted so as not to unnecessarily obscure the present invention.
The invention relates to a quick-acting magnetic control vacuum circuit breaker which mainly comprises a solid sealing pole column assembly, a magnetic control mechanism, a box body assembly and an isolating switch assembly. As shown in fig. 1 and 2, the solid-sealed pole assembly is composed of an epoxy resin insulator 1, a vacuum arc-extinguishing chamber 2, a voltage/current sensor 3, an outgoing terminal 4, a conductive rod 5, a flexible connection 6, an insulating pull rod 7 and the like. The epoxy resin insulator 1 is used as a main insulation structure of the pole and plays roles in insulating the outdoor main circuit phase and the ground; the vacuum arc-extinguishing chamber 2 is used as a core switching-on unit of a switch and is used for switching on and off a short circuit or switching on load current and breaking a line ground fault or fault current generated by the short circuit fault; the voltage sensor in the voltage/current sensor 3 adopts a ceramic capacitor, and the current sensor adopts LPCT, so that high-precision acquisition of voltage and current signals is realized; the outgoing terminal 4 is mainly forged by red copper material, and is plated with silver on the surface and used for being connected with a main loop wire of an overhead line; the conducting rod 5 is forged by red copper material, and forms a main loop conducting structure of the solid sealed pole together with the soft connection 6 and the vacuum arc-extinguishing chamber 2; and 7, the insulating pull rod is composed of carbon steel and SMC insulating materials and is used for transmission connection and insulation between the mechanism and the arc extinguishing chamber.
9 Is a magnetic control mechanism, the iron core is made of a novel memory alloy material, and the magnetic control mechanism has the characteristics of high excitation efficiency, high demagnetizing temperature, stable performance, small dispersibility and the like, and is a core component for realizing the quick breaking performance of the circuit breaker. The magnetic control mechanism 9 is connected with the moving contact of the arc-extinguishing chamber through an insulating pull rod, and is electrified and excited or demagnetized through a coil in the magnetic control mechanism to drive the moving iron core of the mechanism to move, so that the insulating pull rod of the circuit breaker is driven to enable the moving contact of the arc-extinguishing chamber to be communicated with or disconnected from the fixed contact 27, and the switching-on or switching-off operation of the circuit breaker is realized; meanwhile, in the closing state of the circuit breaker, the magnetic control mechanism movable iron core 30 and the static iron core 29 can be separated by manually applying external force on the mechanism, and the circuit breaker insulating pull rod is driven to disconnect the arc-extinguishing chamber movable contact 28 from the static contact 27, so that the manual opening operation of the circuit breaker is realized;
the box assembly consists of a box body 8, an aviation socket 10, a brake separating handle 19, a grounding indication board 25 and a carrying handle 26. The box body 8 can be formed by welding carbon steel sheet metal or integrally casting an aluminum mould, the aviation socket 10 is made of aluminum alloy or copper alloy and other materials, and is connected with the box body 8 through bolts and is mainly used as an electrical connection interface of secondary equipment; the brake-separating handle 19 and the box body 8 are made of the same material, and are connected with the brake-separating main shaft 20 through a driving shaft, so that the manual brake-separating function of the circuit breaker can be realized; the grounding indication board 25 is fixedly connected with the box body through a bolt to play a role of grounding indication; the carrying handles 26 are welded on two sides of the box body and are made of the same material as the box body, and are used for manually carrying or lifting the circuit breaker. The box body is also provided with a travel switch 21, an EVT compensation module 22, a split-combined pointer 23 and an ETC compensation module 24; the travel switch 21 is used for outputting a breaker switching position signal; EVT compensation module 22 is configured to output a voltage signal; the ETC compensation module 24 is configured to output a current signal; the opening and closing pointer 23 is used for indicating the opening and closing state of the breaker. Further, the brake release reset spring 18 is further included and is used for driving the brake release handle to reset after manual brake release.
The isolating switch assembly consists of a movable blade 11, a static blade 12, an insulating support column 13, an isolating switch insulating pull rod 14, an operating handle 15 and a base 16; the movable blade 11 and the static blade 12 are mainly made of red copper material and are communicated, silver plated and tinned on the surfaces of the movable blade and the static blade, and are connected with an arc extinguishing chamber to form a conductive main loop structure of the whole circuit breaker; the insulating support column 13 and the insulating pull rod 14 of the isolating switch are composed of epoxy resin, silicon rubber and copper inserts, and mainly play roles in isolating switch support, driving switch to be opened and closed and isolating the switch to the ground, the copper inserts at two ends are used for bolt installation, the middle epoxy resin is used as a main insulating material, meanwhile, the mechanical strength is enhanced, the surface of the insulating support column is provided with an umbrella skirt structure by the silicon rubber, and the insulating support column has insulation, antifouling and dustproof effects. The operating handle 15 and the base 16 are made of stainless steel or carbon steel, and the operating handle 15 is used for driving the moving blade to move, so that the moving blade is communicated with or disconnected from the static blade to realize the closing or opening of the isolating switch; the base is then used as a structural support for the entire disconnector. The isolating switch assembly is connected with the box assembly through a switch base 17, the box assembly is fastened with the solid-sealed pole assembly through the assembly of the magnetic control mechanism to form a breaker module, an interlocking structure is arranged between the breaker module and the isolating switch assembly, and when the breaker mechanism is switched on, the interlocking main shaft is synchronously driven to rotate to drive the interlocking crank arm to drive the interlocking rod limit isolating switch main shaft to rotate so as to prevent the isolating switch from being switched off; the mechanism releases the limit of the interlocking rod when opening the switch, and the isolating switch can be freely opened and closed at the moment, so that the requirement that the circuit breaker and the isolating switch are interlocked with each other is met.
As can be seen from the structural diagrams of fig. 1 and 2, the overall structure design of the circuit breaker is compact, and the miniaturized design application of the solid-sealed pole structure is realized through reasonable insulation structure design and material selection; the novel magnetic control mechanism can be further reduced in structural volume by the aid of miniaturized application, and meanwhile, the space is designed to be 240mm and is far lower than the space requirement of 340mm of a conventional strut-type circuit breaker. The circuit breaker has integrated voltage sensor in solid sealed post inside, has realized integrating voltage measurement sampling unit and switch body, and external electromagnetic PT then only needs to adopt single winding output like this, uses as power PT, can further reduce the volume, reduction material cost and electromagnetic resonance risk.
The switch body integrates a phase sequence-zero sequence integrated voltage sensor and a phase sequence-zero sequence integrated current sensor, the phase sequence-zero sequence integrated voltage sensor can simultaneously meet the phase sequence voltage sampling (0.5 level) and the zero sequence voltage sampling (3P level), the phase sequence-zero sequence integrated current sensor can simultaneously meet the phase sequence current sampling (0.5 s level) and the zero sequence circuit sampling (1 level), the output precision is high, the measuring range is wide, the application requirement is reliably met within the range of 1% -120% of rated values, and meanwhile, the current sensor meets the 10P10 protection precision requirement.
Working principle and working process of a quick magnetic control vacuum circuit breaker:
the electrical schematic diagram of the switch device, see fig. 3, defines that the two pins of "7-" and "8+" in the core socket of the body 26 are the pins of the mechanism power supply control loop:
Electric closing operation: an operation power supply is applied by a matched terminal or an external power supply module according to 7- 'and 8+' to switch on and output a switching-on signal;
electric brake opening operation: and (3) applying an operating power supply according to '7+' and '8-' by using a matched terminal or an external power supply module, opening a switch, and outputting a split signal.
Manual brake opening operation: the external force is manually applied to the switch body brake-separating handle to pull the movable and static iron cores of the mechanism open, and the switch is used for separating brake and outputting a position-separating signal.
In summary, the invention designs a quick-acting magnetic control vacuum circuit breaker, which comprises an isolating switch assembly, a solid sealing pole assembly, a magnetic control mechanism and a box body assembly; the isolating switch assembly comprises a movable blade, a static blade and an operating handle, wherein the operating handle is used for controlling the movement of the movable blade, so that the movable blade is communicated with or disconnected from the static blade to realize switching on or off; the solid-sealed pole component is used for realizing the transmission of the magnetic control mechanism and the isolating switch component; the magnetic control mechanism is used for driving the movable blade to move, so that the movable blade is communicated with or disconnected from the static blade to realize switching on or switching off; the inside magnetic control mechanism that sets up of box subassembly, upper portion sets up seal utmost point post subassembly admittedly. The solid-sealed polar pole is miniaturized, and is internally provided with a voltage sensor, a current sensor and a vacuum arc-extinguishing chamber, so that the functions are comprehensive; the magnetic control operating mechanism is adopted, so that the power consumption is low, the brake separating speed is high, and the performance is reliable. The whole machine has small volume, light weight, low power consumption, convenient installation and convenient maintenance.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explanation of the principles of the present invention and are in no way limiting of the invention. Accordingly, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present invention should be included in the scope of the present invention. Furthermore, the appended claims are intended to cover all such changes and modifications that fall within the scope and boundary of the appended claims, or equivalents of such scope and boundary.
Claims (6)
1. The quick-acting magnetic control vacuum circuit breaker is characterized by comprising an isolating switch assembly, a solid sealing pole assembly, a magnetic control mechanism and a box body assembly;
The isolating switch assembly comprises a movable blade, a static blade, an isolating switch insulation pull rod and an operating handle, wherein the operating handle is used for controlling the isolating switch insulation pull rod to drive the movable blade to move, so that the movable blade is communicated with or disconnected from the static blade to realize switching-on or switching-off of the isolating switch; the isolating switch assembly further comprises an insulating support column, an isolating switch insulating pull rod and a base; the insulation support is used for supporting the static blade, and the isolating switch insulation pull rod is used for supporting the movable blade; the insulation support is fixed on the base, the operating handle is mounted on the base, and the operating handle drives the insulation pull rod of the isolating switch to rotate the movable blade of the isolating switch through the isolating spindle so as to realize the opening and closing operation of the isolating switch; the isolating switch assembly is connected with the box body assembly through a switch base, the box body assembly is assembled and fastened with the solid-sealed pole assembly through 4 mounting bolts of the magnetic control mechanism to form a breaker module, an interlocking structure is arranged between the breaker module and the isolating switch assembly, when the breaker is closed, the isolating switch is prevented from being opened and closed, and when the breaker is opened, the isolating switch is allowed to be opened and closed;
The solid-sealed pole assembly is used for casting and integrating the arc extinguishing chamber, the voltage and current sensor and the solid-sealed pole assembly, and is used as a core breaking unit and a voltage and current signal acquisition unit of the circuit breaker; the solid-sealed pole assembly comprises an epoxy resin insulator, a vacuum arc-extinguishing chamber, a voltage/current sensor, an outlet terminal, a conducting rod, a flexible connection and an insulating pull rod; the epoxy resin insulator is fixed to the box body assembly, and the vacuum arc extinguishing chamber, the voltage/current sensor and the conducting rod are fixedly sealed inside the box body assembly; the vacuum arc-extinguishing chamber is used for switching on or off load current and fault current generated by a ground fault or a short circuit fault of a disconnected line; one end of the insulating pull rod is connected to the vacuum arc-extinguishing chamber, the moving contact of the arc-extinguishing chamber is connected to the conducting rod through soft connection, and the other end of the insulating pull rod is connected to the magnetic control mechanism through the metal pull rod; the voltage/current sensor is fixedly sealed and integrated on one side of the epoxy resin insulator, detects the voltage or current flowing through the conducting rod, and is led out through the outlet terminal;
The magnetic control mechanism is connected with the moving contact of the arc extinguish chamber through the insulating pull rod of the circuit breaker, and the moving iron core of the mechanism is driven to move by energizing and demagnetizing the coil in the magnetic control mechanism, so that the insulating pull rod of the circuit breaker is driven to enable the moving contact of the arc extinguish chamber to be communicated with or disconnected from the fixed contact, and the switching-on or switching-off operation of the circuit breaker is realized; in the closing state of the circuit breaker, the external force can be manually applied to the magnetic control mechanism to separate the movable iron core from the static iron core of the mechanism, and the insulating pull rod of the circuit breaker is driven to disconnect the movable contact of the arc extinguishing chamber from the static contact, so that the manual opening operation of the circuit breaker is realized;
The magnetic control mechanism is arranged in the box body assembly, and the solid-sealed pole assembly is arranged at the upper part of the box body assembly and used for solid-sealed pole assembly support, protection of a transmission structure in the circuit breaker and display of the opening and closing states of the circuit breaker; the box body assembly is also provided with a travel switch, an EVT compensation module, a split-combined pointer, an ETC compensation module, a grounding indication board, a handle and a lifting hook; the travel switch is used for outputting a switching position signal of the circuit breaker; the EVT compensation module is used for outputting a voltage signal; the ETC compensation module is used for outputting a current signal; the opening and closing pointer is used for indicating the opening and closing state of the breaker; the grounding indication board is used for indicating whether the grounding is carried out or not; the handle and the lifting hook are welded on two sides of the box body.
2. The rapid-action type magnetic control vacuum circuit breaker according to claim 1, wherein the moving blade and the stationary blade are made of red copper, and the surfaces thereof are plated with silver and tin; the insulating support and the insulating pull rod of the isolating switch consist of epoxy resin, silicon rubber and copper inserts, the inside is epoxy resin, the surface is made of silicon rubber to form an umbrella skirt structure, and copper inserts for bolt installation are arranged at two ends of the umbrella skirt structure; the operating handle and the base are made of stainless steel or carbon steel.
3. The quick-action type magnetic control vacuum circuit breaker according to claim 2, wherein the insulating pull rod is internally made of carbon steel and is externally wrapped with SMC insulating material.
4. The quick-action type magnetic control vacuum circuit breaker according to claim 2, wherein the outgoing terminal is forged from red copper material, and is surface-plated with silver or tin for connection with an overhead line main circuit wire.
5. The quick-action type magnetic control vacuum circuit breaker according to claim 2, wherein the mechanism iron core is made of a memory alloy material.
6. The rapid-action type magnetic control vacuum circuit breaker according to claim 1, wherein the box assembly is provided with an aviation socket, and power control loop pins are led out, and the switching-on or switching-off of the mechanism is realized by applying a switching-on power supply or a switching-off power supply to the magnetic control mechanism.
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| CN114038706B (en) * | 2021-11-10 | 2024-06-11 | 南京海兴电网技术有限公司 | Intelligent isolation type quick breaker |
| CN113936964B (en) * | 2021-11-10 | 2024-09-06 | 珠海许继电气有限公司 | Full-automatic assembly system and assembly method for movable knife assembly of molded case circuit breaker |
| CN114203489A (en) * | 2021-11-12 | 2022-03-18 | 珠海许继电气有限公司 | Intelligent magnetic control low-voltage switch device |
| CN116525327B (en) * | 2023-05-06 | 2023-10-20 | 保定市冀中电力设备有限责任公司 | Secondary fusion on-column circuit breaker with protection type isolating switch |
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| CN202159623U (en) * | 2011-08-19 | 2012-03-07 | 珠海许继电气有限公司 | Pole-type permanent magnet vacuum circuit breaker |
| CN205508704U (en) * | 2016-01-08 | 2016-08-24 | 乾瑞电气有限公司 | Permanent magnet vacuum breaker on outdoor post |
| CN210778434U (en) * | 2019-10-28 | 2020-06-16 | 珠海许继电气有限公司 | Circuit breaker |
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