WO2003060939A1 - Disjoncteur - Google Patents

Disjoncteur Download PDF

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Publication number
WO2003060939A1
WO2003060939A1 PCT/CN2002/000773 CN0200773W WO03060939A1 WO 2003060939 A1 WO2003060939 A1 WO 2003060939A1 CN 0200773 W CN0200773 W CN 0200773W WO 03060939 A1 WO03060939 A1 WO 03060939A1
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Prior art keywords
current
contact
opening
closing
circuit
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PCT/CN2002/000773
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English (en)
Chinese (zh)
Inventor
Weiqi Liu
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Weiqi Liu
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Priority to AU2002344034A priority Critical patent/AU2002344034A1/en
Publication of WO2003060939A1 publication Critical patent/WO2003060939A1/fr

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H9/00—Details of switching devices, not covered by groups H01H1/00 - H01H7/00
    • H01H9/30—Means for extinguishing or preventing arc between current-carrying parts

Definitions

  • the invention relates to circuit breakers of various types of capacity series of all voltage levels of the power system and the replacement of larger-capacity contactors, and is a major technical revolution in the field of power switches. Background technique
  • the existing arc extinguishing devices of various types of circuit breakers and contactors are developed based on various arc extinguishing principles in the arc extinguishing theory, and are designed according to the breaking of the short-circuit current. They are required to be in operation. It is possible to consider the most severe electrical conditions when short-circuit current is encountered to consider mechanical operating characteristics. In this way, a strong mechanical impact during each heavy-load operation will significantly affect the service life of the circuit breaker. When a traditional circuit breaker and a synchronous circuit breaker are opened and cut off, a high-speed race of physical changes takes place between their dynamic and static contacts. A competition between the voltage recovery speed and the growth rate of the medium strength between the dynamic and static contacts.
  • the invention relates to circuit breakers of various types of capacity series of all voltage levels of the power system and the replacement of larger capacity contactors, and is a major technical revolution in the field of power switches.
  • the existing switching-off and arc-extinguishing devices of various types of circuit breakers and contactors are developed based on various arc-extinguishing principles in arc-extinguishing theory, and are designed according to the breaking of short-circuit current. They are required to be in operation. It is possible to consider the most severe electrical conditions when short-circuit current is encountered to consider mechanical operating characteristics. In this way, a strong mechanical impact during each heavy-load operation will significantly affect the service life of the circuit breaker. When a traditional circuit breaker and a synchronous circuit breaker are opened and cut off, a high-speed race of physical changes takes place between their dynamic and static contacts. A competition between the voltage recovery speed and the growth rate of the medium strength between the dynamic and static contacts.
  • circuit breakers such as SF 6 circuit breakers in the high voltage field and permanent magnet synchronous circuit breakers in the medium voltage field.
  • the present invention directly operated high-voltage motors of 625 kw and 2500 kw with isolation switches without causing arcs and causing serious accidents.
  • the arc-free interruption theory and its discussion have been discussed since 1968. application.
  • Comrade Yu Weihua former State Science and Technology Commission, attached great importance to and supported the two early papers. He had arranged discussions at the Institute of Electrical Engineering, Institute of Physics, and Department of Electric Power, Tsinghua University.
  • Professor Qian Jiayi believes that it is theoretically correct, but there will be many difficulties in realizing it, and he will guide future research directions in person.
  • the new theory breaks through the design ideas of traditional circuit breakers, reducing heavy-load operations to no-load or light-load operations during each opening and closing operation, and transforming high-speed competition-type dynamic interruption of switch contacts into switch contacts.
  • a current interruption switch has been developed, which can solve the technical problems of many of the disadvantages of the above circuit breakers and meet the needs of modernization of the power grid.
  • the breaking device makes a significant contribution. After searching that there is no technical means for such a disconnect switch at home and abroad, after the international application for the invention patent, it will generate significant economic benefits for China. BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 Structure diagram of multi-channel insulation barrier tubular mercury interrupter
  • FIG. 1 Structural diagram of a tubular sodium interrupter with a piston;
  • Figure 6 a structural diagram of a tubular sodium interrupter with a bellows;
  • Figure 10 Structure diagram of a double transfer long open distance contact unit
  • Figure 13 Structure diagram of double-acting single-transfer interruption switch
  • FIG. 14 Figure 12 three steady state diagrams during operation
  • Figures 16 and 15 are four steady state diagrams during operation
  • Figure 17 Structure diagram of double-acting double-transfer interruption switch
  • Figure 19 Schematic diagram of electromagnetic lock structure
  • Figure 20 Schematic diagram of permanent magnet lock structure
  • Figure 21 Schematic diagram of the monostable permanent magnet operating mechanism
  • Fig. 22 Schematic diagram of the structure of the bistable permanent magnet operating mechanism
  • Figure 23 Schematic diagram of the tri-stable permanent magnet operating mechanism
  • FIG. 24 Schematic diagram of the four-steady-state permanent magnet operating mechanism
  • FIG. 26 Schematic diagram of auxiliary switch structure
  • FIG. 27 Circuit diagram of single operation single transfer control unit
  • FIG. 28 Circuit diagram of dual-operation single-transfer control unit
  • FIG. 29 Circuit diagram of single operation and double transfer control unit
  • FIG. 30 Circuit diagram of dual-operation dual-transfer control unit
  • the cut-off switch mainly includes four components such as a cut-out, a contact unit, a switch mechanism and a program control unit.
  • the present invention adopts the interruption principle of the non-arc interruption principle, 8-current-limiting and breaking principle, 16-current principle of repulsive breaking, and 12-state principle of static interruption to develop a current interrupter.
  • the current-limiter and non-current-limiting types of the circuit breaker can reliably and reliably cut off the loop current without arcing or extinguishing, static or fretting, and make full use of the large current in the loop, especially the electric repulsion force of the short-circuit current. Performs fast current-limiting interruption.
  • the present invention adopts the interruption principle 2 of the arc-free interruption theory—the cold-state separation principle, the interruption principle 13—the current transfer principle, the interruption principle 15—comprehensive interruption principle and the contact principle of the disconnector, and develops a knife gate type Contact unit.
  • the current in the circuit is first transferred to the current interrupter, and the current interrupter cooperates with the current interrupter to perform comprehensive interruption.
  • the dynamic and static contacts are cold-arc-free, and the power is safely isolated.
  • the invention adopts the non-arc current cut-off principle 3-fast response principle, current cut-off principle 17-light load breaking principle and operation principle of the isolating switch to develop a direct-acting switch mechanism.
  • the mechanism is simple and lightweight, and has a fast response to the opening and closing. It can perform open or close operation with or without light load.
  • the development of the program control unit is relatively simple. It uses low-grade program control and is programmed into a fool-type step-by-step operation.
  • the current interrupter is responsible for the instantaneous current-carrying task of opening and closing the circuit, and its working time is very short, usually within 10ms or about 30ms. Therefore, it is not necessary to consider long-term heating temperature rise and thermal stability when designing, but also need to consider instantaneous high temperature resistance, dynamic stability and pressure resistance performance, and related interruption parameters. Then the load-carrying surface of the current interrupter and each current-carrying element in the circuit connected to it can be designed very small. Most circuit breakers are static, there is no mechanical transmission connection, the sealing problem is easy to solve, and the manufacturing difficulty is not great. The volume of the circuit breaker can be designed very small.
  • circuit breakers have a long life and can be theoretically designed to be permanent; some are disposable and can be designed to automatically pop up and replace spare parts immediately after each interruption; some have a longer life and can be designed to be able to Periodically (eg several years) it is convenient to change the connection form of the spare parts (like plug-in fuses).
  • the design of the contact unit must not only ensure reliable power supply during the operation of the disconnect switch, but also be able to quickly transfer the current interruption under high-speed dynamic conditions to the static or easy interruption of the interrupter. It is necessary to eliminate the contact bounce when closing, and solve the problem of butt-type closing pressure; eliminate the electrical wear of the contacts, and solve the problems of electrical life and manufacturing difficulty.
  • the design of the contact unit must have the function of turning on the current and isolating the power source. When the current is turned on, the closing speed of the contact has reached the maximum value. If there is no time for breakdown or a significant large arc has not yet formed, it can be closed quickly.
  • the opening and closing operations are arc-free or micro-arc operation.
  • a micro-switch-type current interrupter When a micro-switch-type current interrupter is used, the design of the contact unit only needs to have the function of connecting voltage and isolating the power source, and it has no load or disconnection, which is obviously arc-free operation. Then the contact unit does not have the difficulty of manufacturing, and has a long service life and low production cost.
  • the design of the gate mechanism should eliminate or simplify the transmission mechanism and contact travel mechanism, minimize the transmission chain, and directly apply the operating power source to the contact.
  • the response of the initial opening is extremely fast, and it can be quickly separated.
  • the locking device in the switch requires instantaneous automatic locking and fast electric unlocking. It is not necessary to consider the closing pressure of the contact butt in the design. To reduce the closing and opening forces and their power consumption, it can be reduced to 1/3 ⁇ 1/10 of the existing circuit breaker, reaching no load or light. Contain the desired performance. Can eliminate strong mechanical impact, solution Solve the problem of mechanical life, reduce weight and volume, reduce production costs and solve manufacturing difficulties.
  • the design of the control unit shall be based on the function setting of the interrupter.
  • One procedure shall be applicable to the miniature interrupter type interrupter, and the other procedure shall be applicable to the miniature switch device interrupter. It should be able to resolve complex, fast, accurate, reliable, and high-precision intelligent control operations into simple, slow, and fool-proof controls.
  • the low-level step-by-step program control unit is compiled, with simple structure and few components, and naturally low cost and cost. It not only solves the problem of control accuracy, but also solves the problem of opening speed. It is applied to the control design of AC short-circuit current.
  • the short-circuit current control design far from the power plant requires a delay of about 45ms from the instant of the short-circuit before transferring the current to the interrupter in time; for the short-circuit current near the power plant Control design requires a delay of about 150ms.
  • the specific delay time can be calculated according to the parameters of the specific circuit.
  • the decay time of the maximum transient component of the short-circuit current can be determined to determine the time when the first zero-crossing current occurs after the short-circuit.
  • the interrupter can be controlled to assume the task of transferring current and breaking the circuit when the transient component of the short-circuit current decays to zero crossing, which can ensure the shortest working time of the interrupter, its current-carrying cross-section and volume are the smallest, and can be controlled by electrical appliances or PC control.
  • the overall structure of the interrupt switch is composed of a control unit, a switch mechanism, a contact unit and an interrupter.
  • the type of the current interrupter it can be divided into two types of structures.
  • One type is the current interrupter equipped with a micro interrupter, which can be called a single transfer interrupt switch structure.
  • the functional block diagram is shown in Figure 1.
  • the other type is a current interrupter equipped with a micro switch device, which can be called a double-transfer interruption switch structure.
  • the functional block diagram is shown in Figure 2.
  • the interrupter is a current-limiting or non-current-limiting micro interrupter or micro switch device without arc interruption or arc interruption interruption.
  • the micro interrupter can only be used to disconnect the circuit and cannot be used to switch on. Circuit; a miniature switching device is essentially a very small "circuit breaker".
  • the various design schemes described in this article can be developed into circuit breakers with various breaking capacities of different voltage levels, which can meet the needs of AC or DC low voltage, medium voltage, high voltage, ultra high voltage and ultra high voltage power systems. Make the disconnect switch easily realize arc-free operation or micro-arc operation.
  • the interrupter can be easily replaced in the interrupt switch, which can improve the service life of the switch dozens of times, improve safety and reliability, and greatly reduce the use cost.
  • the interrupter is classified into limited flow type and non-restricted flow type according to the cut-off characteristic, with or without arc cut-off type and arc-extinguished cut-off type; classified according to the operating characteristics of static type and micro-movement type; classified according to the cut-off medium, solid-state , Liquid type, gaseous type and vacuum type.
  • the invention designs nine types of circuit breakers: a. Mercury circuit breaker, b. Sodium circuit breaker, c.
  • Fuse circuit breaker, d PTC (Positive Temprature Coeffcient) circuit breaker, e, thyristor circuit breaker, f, micro-motion circuit breaker, g, rocker circuit breaker, h, electronically controlled circuit breaker, i , Magnetically controlled interrupter.
  • PTC Pulsitive Temprature Coeffcient
  • the voltage level and breaking capacity of thyristor interrupters are limited by their own performance, and their prices are particularly expensive; and the switching performance of ⁇ g, h, i four types of interrupters has significant advantages over their respective, can be It meets the requirements of various voltage levels and breaking capacity, which will be described later in another article.
  • five types of interrupters &, b, c, d, and e.
  • Mercury current interrupter is a kind of current-limiting type arc extinguishing static static interruption device. Its structure is basically the same as that of fuse. See Figure 3, Figure 3 (a) is a circular tube structure, Figure 3 (b) is a flat tube structure.
  • s 1 is a pressure-resistant and high-temperature arc-resistant insulating shell
  • s ⁇ ns 3 is a copper cap with a copper connection plug
  • S 4 is mercury placed in a small groove in the bottom of the shell. Closed by a copper cap.
  • the shell is filled with air or vacuum, high-pressure gas, insulating oil, SF ⁇ n C 3 F 6, etc., and a suitable gas or liquid insulation medium with good arc extinguishing performance can be selected according to the voltage level.
  • the current cut-off principle is relatively simple. When the current is passed through the mercury conductor with a small cross-section in the small slot, it quickly heats up to become mercury vapor. When the current crosses zero, the arc extinguishes the interruption circuit. After a short period of heat dissipation, the mercury vapor cools back to liquid mercury and flows back naturally into a small groove in the bottom of the tube to prepare for the next interruption.
  • the length of the insulation tube shell can be increased and multiple insulation barriers can be added. Only the small grooves at the bottom of the tube shell are connected to each other, as shown in Figure 4.
  • a high-speed gas blowing nozzle for arc extinguishing can be formed at a small groove at the bottom of each barrier, and the arc is divided into multiple small sections, which is conducive to cooling and quenching, increasing the arc pressure drop and its resistance, and can prevent The arc reignited.
  • multiple multiple insulation barriers may be connected in series to increase the number of arc breaks and the length of the arc.
  • Multiple serially isolated small mercury tanks can be set in the same shell, and several such tubes can be connected in series, but all small tanks must be in the same horizontal plane to ensure that mercury is in the small tank. Uniform distribution within.
  • the cut-off switch equipped with a mercury interrupter needs to be arc-extinguished during the manufacturing of the contact front end of the dynamic and static contacts to make an arc-extinguishing contact end.
  • the air medium can meet the conditions of use.
  • the contact system needs to be placed in insulating oil or other insulating media.
  • the moving contact After the current is quickly limited by the interrupter, the moving contact will continue to separate to the opening position. Rear position, safely isolate power. It can also be considered that during the opening process of the cut-off switch, when the breaking speed of the cut-off device is a little faster than the opening speed of the moving contact, as long as the time is suitable, it can be quickly opened in place at one time without the need to divide in steps. Programmable gate control System.
  • Mercury circuit breakers are light in weight, small in size, easy to manufacture, low in price, reusable, have a long life, and have current limiting characteristics. They are suitable for AC or DC power circuits with frequent operation of various voltage levels. The disadvantage is that it must be placed horizontally during work. It needs a certain heat recovery time after the current is cut off. It can only be used to break the middle circuit and cannot be used to connect the circuit.
  • Sodium interrupter is a micro-flow micro-interrupter with current-limiting arc extinguishing and interruption. Its structural principle is shown in Figure 5.
  • Figure 5 (a) is a circular tube structure with a piston at one end, which is suitable for Single operation single transfer type cut-off switch;
  • Figure 5 (b) is a circular tube structure with pistons at both ends, which is suitable for double operation single transfer type cut-off switch.
  • the figure shows a pressure-resistant, high-temperature arc-resistant insulating shell with a thin pipe in the middle.
  • N 2 is the copper cap of the closed shell
  • ⁇ and N 9 are the copper caps of the closed shell with the piston
  • N 4 is The metal cavity filled with the copper cap cavity at both ends of the tube shell is filled with sodium metal
  • N s and N 7 are pistons for squeezing sodium
  • N 6 and N 8 are insulating ejector rods connected to the piston.
  • the copper caps on both ends of the tube can be plugged into the designated copper sockets in the cut-off switch to connect the circuits on both ends of the socket.
  • the current cut-off principle is relatively simple. When the current is passed through the sodium conductor with a small cross-section in a thin pipe, it quickly generates heat and turns into sodium vapor.
  • the insulating tube shell can be made of high alumina ceramics or other materials with superior performance.
  • the connection with the copper caps at both ends can be welded with a valve metal (iron-nickel-cobalt alloy).
  • the length of the shell can be selected according to the different requirements of various voltage levels, and the appropriate insulation withstand voltage distance can be selected.
  • the thickness of the shell can be determined according to the impact strength of the short-circuit arc.
  • Figure 6 (a) is a circular tube structure with a corrugated tube at one end
  • Figure 6 (b) is a band with both ends. Round tube structure with bellows.
  • N a ceramic shell with a thin pipe in the middle
  • N 12 , N 13 and N 19 are copper caps connected to the shell
  • N 14 is filled in the cavity of the shell that connects the two ends of the copper cap and the bellows.
  • Metal sodium, N 15 and N 17 are bellows
  • N 16 and N 18 are insulating end caps that close the bellows.
  • the copper caps at both ends of the round pipe can be inserted into the designated copper sockets in the cut-off switch, and the sockets can be connected.
  • the principle of its current interruption is the same as that of the structure shown in Figure 5. Its sealing performance and use effect are better. If the self-closing force of the bellows can match the impact pressure of the arc at the time of interruption, it can also be used. Made of static miniature interruption device.
  • the working principle of a circuit breaker equipped with a sodium circuit breaker is basically the same as that of a mercury circuit breaker. See the description in section 2.2 of this section. The difference is that a dedicated link is connected to the moving contact of the operating mechanism and the operating lever of the semi-static contact in the interrupt switch.
  • the moving contact and the static contact and the semi-static contact are connected.
  • the special connecting rod can respectively push the insulating jacks N ⁇ ⁇ ⁇ 8 in the interrupter, which can squeeze gold
  • the presence of sodium keeps them in good contact and prepares them for shut-off.
  • the brake is opened, the current can be automatically transferred to the interrupter as soon as the moving contact and the semi-static contact are separated.
  • the special connecting rod on the operating lever also leaves the insulating ejector in the interrupter in time. After the circuit breaker quickly limits the current and cuts off the circuit, the moving contact continues to separate to the post-opening position to safely isolate the current.
  • the sodium interrupter is small in size, easy to manufacture, reusable, and has a long service life. It has excellent current limiting characteristics and can be used in AC or DC power circuits with frequent operation of various voltage levels. The disadvantage is that it needs a certain heat recovery time after the current is cut off. It can only be used to break the circuit and cannot be used to connect the circuit.
  • Fuse interrupter is a kind of disposable static miniature interruption device with arc extinguishing and interruption. Its structure is basically the same as that of fuse. The difference is that the working time of the current interrupter is very short, only milliseconds. The temperature rise and thermal stability issues are not considered in the design. Its volume is small and the metal fuse is thin.
  • vacuum, high-pressure gas or liquid such as insulating oil, hydrocarbon, SF 6 and C 3 F 6 and other arc-extinguishing insulating media, can be considered for development.
  • the structural principle of the automatic replacement device is also relatively simple. principle.
  • the cut-off switch equipped with a fuse interrupter works basically the same as a mercury interrupter, see this section
  • the fuse circuit breaker is light in weight, small in size, easy to manufacture, low in cost, and has current limiting characteristics, and is suitable for power supply circuits that are operated infrequently.
  • the disadvantage is that the spare parts must be automatically replaced immediately after each current interruption. It can only be used to break the circuit, and cannot be used to connect the circuit.
  • PTC current interrupter is a current-limiting type static micro interrupter without arc interruption. Its structural principle is to fill a common PTC thermosensitive element with a certain density of conductive particles in the middle of ordinary insulating materials (such as polyethylene). It is a conductor with a conductive link. When connected to the circuit, the current will generate a thermal effect through the interrupter. The thermal diffusion ability of the insulating material of PTC is stronger than that of the conductive material. The thermal diffusion of the insulating material will divide the conductive particles until the conductive link is blocked.
  • PTC circuit breaker is simple in structure, light in weight and small in size. It has good current-limiting characteristics and can be statically arc-free blocking circuit. It is especially suitable for short circuit and DC circuit breaking.
  • the disadvantage is that a certain heat recovery time is required after the current is cut off, and it cannot be frequently operated immediately, and can only be used to break the circuit, and cannot be used to connect the circuit.
  • Thyristor current interrupter is a kind of static micro switch device without arc interruption. It is composed of thyristor without heat sink and its control circuit. Its structural principle is essentially the static arc-free switching principle of thyristor.
  • the interrupter is the interruption of the natural zero crossing of the AC current.
  • the working time in the interrupt switch is short, and does not exceed the half cycle of the power frequency current-10ms. In this way, the switching function of the thyristor without arc interruption can be brought into full play, and its interruption capacity can be increased by 5 to 10 times.
  • the rated voltage and rated current of high-power thyristors are not high enough at present.
  • High-power tubes have been developed and used at home and abroad, with a rated voltage of 8000V and a rated current of 3000A.
  • Using the series-parallel structure principle can improve the interrupting capacity and Voltage level. Due to its short working time, large heat sinks are generally not needed, and it can be placed in insulating oil during high pressure or frequent operations.
  • the cut-off switch equipped with a thyristor interrupter performs step-by-step operation according to program control.
  • the circuit breaker is only connected to the circuit and is not turned on.
  • the thyristor control electrode is triggered and the circuit is activated after the circuit is connected.
  • the contacts continue to close to the closed position, and the circuit breaker is shorted in the circuit, and it is ready for opening.
  • the current in the circuit was automatically transferred to the current interrupter as soon as the semi-static contact of the switch was separated, and then the trigger voltage of the thyristor control pole was quickly and automatically turned off. After the AC current crosses zero automatically, the moving contacts will continue to separate to the post-opening position to safely isolate the power supply.
  • Thyristor interrupters have a very long life. Not only can they be statically disconnected without arcs, but also they can be connected statically without arcs, and they can be opened and closed very quickly. They can be used in power supply circuits that are operated frequently. However, its price is relatively expensive, and its ability to withstand short-circuit current is poor.
  • the structure of the contact unit is a bit like a knife blade of a three-phase isolating switch.
  • Each phase has a moving contact and a set of static contacts.
  • the stationary contact group has a stationary stationary contact, a movable semi-static contact, and a stationary transfer contact.
  • the static contact is connected to the power supply side
  • the semi-static contact is connected to the load side through a soft connection
  • a current interrupter is connected between the semi-static contact and the transfer contact.
  • the moving contact is a strip-shaped double-piece gate knife connected to the operating lever. During the brake, the two ends of the blade clamp the three contacts of the static contact group.
  • a steel plate and a pressure spring are mounted on the outside of the double blade, and the steel plates that are close to the static contacts at the outer ends of the two ends of the blade are magnetic locks.
  • the steel plates are not shown in the following figure. It has two functions. On the one hand, under the pressure of the spring, through the lever ratio of the magnetic lock, the blade and the static contacts can maintain a good contact and generate a large contact pressure. On the other hand, the short-circuit current flows. Obsolete, because the steel plate is magnetized, a magnetic suction force can be generated, which acts on the blade to increase the contact pressure, thereby preventing short-circuit current from causing contact welding and preventing the blade from separating by itself. If its load current is required to be large, each phase can adopt the double-blade knife or multi-noise structure of the above-mentioned form.
  • the basic function of the contact unit in the interrupt switch is that the dynamic and static contacts can perform the operation of separating and closing the circuit, and also has the function of automatically transferring the loop current to the interrupter at the moment of opening and closing. According to its function of transferring current, it can be divided into single transfer type contacts and double transfer type contacts.
  • the single transfer type contact unit is suitable for the interrupter of the micro interrupter.
  • the double transfer type contact unit is suitable for the micro Circuit breaker.
  • the pressure-resistant opening distance of the dynamic and static contacts can be divided into two structural forms of short opening distance and long opening distance.
  • the insulation distance of short opening distance is generally not more than 125mm, and the long opening distance is generally greater than 125.
  • the short-open distance contact unit is suitable for low-voltage and medium-voltage cut-off switches
  • the long-open distance contact unit is suitable for medium-voltage and higher voltage cut-off switches.
  • FIG. 7 The structure and principle of the single transfer short-open contact unit is shown in Figure 7, where 1 is a moving contact, 2 is a static contact, 3 is a semi-static contact, 4 is a transfer contact, Figure 7 (a) and Fig. 7 (c) is a front view of the moving contact and the static contact group, and Figs. 7 (b) and 7 (d) are left views thereof, respectively.
  • Fig. 7 (c) the front ends of the static contact and the semi-static contact are aligned on a straight line, and the front end of the transfer contact is about 3mm behind it.
  • Figure 8 The structure principle of the single-transfer long-open-distance contact unit is shown in Figure 8, which is basically the same as the single-transfer short-open-distance contact unit. The difference is that the shape of the transfer contacts is somewhat different, and the opening distance between the contacts is relatively large.
  • Figure 9 The structural principle of the double-transferred short-open-distance contact unit is shown in Figure 9, which is basically the same as the single-transferred long-open-distance contact unit.
  • the front end of the static contact and the transfer contact are aligned in a straight line.
  • the front end of the semi-static contact is more than 30mm behind it.
  • FIG. 10 The structure of the double-transferred long-open-distance contact unit is shown in FIG. 10, which is basically the same as the double-transferred short-open-distance contact unit. The difference is that the front ends of the static contacts and the transfer contacts are aligned in a straight line, the semi-static contacts are farther back, and the distance between the contacts is larger. 4 Design scheme of switch mechanism
  • the operating mechanism can be designed as an operating mechanism with different strokes according to the requirements of the voltage level. Low-pressure actuators with short strokes are required. The stroke is tentatively within 40mm. Simple E-type or U-type or solenoid solenoids can be used as the power source for operation. A medium-stroke operating mechanism is required for medium pressure, and its stroke is tentatively set at 40 ⁇ 125mm. A simple solenoid-type electromagnet or energy storage spring can be used as the power source for operation. The voltage level above medium voltage requires a long-stroke operating mechanism. Its stroke is tentatively set to 125mm or more. Energy storage springs or electric motors or hydraulic mechanisms can be used as the operating power source. If one actuator cannot meet the needs, it can also be designed as a dual actuator. The single-acting cut-off switch is controlled by one operating mechanism to operate the three-phase moving contact in one body. The double-acting cut-off switch needs to be controlled by another operating mechanism to operate the three-phase semi-static contact in one body.
  • the switch mechanism requires two types of structures: single-acting and double-acting.
  • the contact units are divided into single-transfer type and double-transfer type.
  • the single-phase structure principle of the single-acting single-transfer interruption switch is shown in Figure 11.
  • the contact unit in the figure adopts the structure type of the single-transfer short-open contact unit shown in Figure 7.
  • 1 is a moving contact
  • 2 is a static contact
  • 3 is a semi-static contact
  • 4 is a transfer contact
  • 5 and 6 are operating levers
  • 7 and 8 are electromagnetic locks
  • 9 is an E-type opening solenoid.
  • 16 is a pressure spring
  • 11 is a soft connection
  • 12 and 14 are terminals
  • 13 is a circuit breaker
  • 15 is a hard connection.
  • the static contact 2 is connected to the power supply side
  • the terminal 12 is connected to the load side.
  • a closing spring is sleeved on the middle core of the E-type electromagnet 9, and the closing spring is stored with energy when the electromagnet is attracted to prepare for closing.
  • a solenoid solenoid or an energy storage spring can be used as the operating power source.
  • the cut-off switch has three stable states during operation, as shown in Figure 12, where Figure (a) is the opening position, Figure (b) is the closing position, and Figure (c) is the initial breaking position.
  • 1 is a moving contact
  • 2 is a static contact
  • 3 is a semi-static contact
  • 4 is a transfer contact
  • 5 and 6 are operating levers
  • 7 and 8 are electromagnetic locks
  • 16 is a compression spring.
  • the electromagnetic lock 7 When the cut-off switch receives the closing command, as shown in Figures 11 and 12, the electromagnetic lock 7 is unlocked by power on, and the operating lever 5 pushes the moving contact 1 to close the static contact 2 and the static contact 2 quickly under the elastic force of the closing spring. In the semi-static contact 3, it is then closed to the transfer contact 4 and continues to push the semi-static contact 3 to the closed position shown in FIG. 12 (b).
  • the electromagnetic lock 8 automatically locks the operating lever 6, and the electromagnetic The lock 7 is automatically powered off by the normally closed contact of the auxiliary switch. This The current interrupter 13 has been short-circuited in the circuit and is ready for analysis.
  • the moving contact 1 is mainly fixed to the static contact group by the clamping force on both sides of the blade, and of course there is a closing spring.
  • the opening solenoid 9 When opening, the opening solenoid 9 is energized to attract the armature. Under the action of a large electromagnetic force, the operating lever 5 pulls the contact 1 to be quickly separated to the initial opening position shown in FIG. 12 (c). It is automatically locked, and the opening solenoid 9 is automatically powered off by the normally open auxiliary contact of the electromagnetic lock 7. After the circuit breaker 13 automatically disconnects the circuit, the control unit delays energizing the opening electromagnet 9 again, and at the same time energizes the electromagnetic lock 7 to unlock it. The operating lever 5 continues to pull the contact 1 to separate it to Fig. 12 (a) The opened position shown is automatically locked again by the electromagnetic lock 7, and at the same time, the open-circuit power generator 9 is automatically powered off.
  • the semi-static contact 3 moves to the opening position shown in FIG. 12 (a) under the spring thrust, and the electromagnetic lock 8 is automatically powered off by the auxiliary contact.
  • the opening solenoid 9 stores energy for the closing spring at the same time as the opening, and prepares for the next closing.
  • the single-phase structure principle of the double-acting single-transfer cut-off switch is shown in Figure 13, and the components in the figure are basically the same as those shown in Figure 11.
  • the difference is that the contact unit adopts the structure type of single transfer long opening distance shown in FIG. 8, and at the same time, another E-type opening solenoid 10 is connected to the operating rod 6 of the semi-static contact 3.
  • the electromagnets 9 and 10 can each adopt solenoid type, E-type or U-type electromagnets, or energy storage springs, electric motors, hydraulic mechanisms, etc., as operating power sources according to the voltage level and the requirements of the operating stroke.
  • the cut-off switch has three stable states during operation, as shown in Figure 14. In the figure, (a) is the opening position, (b) is the alarm position, and (c) is the initial opening position.
  • the working principle of the interrupt switch is described with reference to FIGS. 13 and 14.
  • the electromagnetic lock 7 When closing, the electromagnetic lock 7 is instantly energized and unlocked.
  • the moving contact 1 is quickly closed to the closing position shown in FIG. 14 (b) under the thrust of the closing spring in the electromagnet 9, and the electromagnetic lock 7 is switched by an auxiliary switch.
  • the normally closed contact is automatically powered off.
  • the moving contact 1 closes the static contact 2, the semi-static contact 3 and the transfer contact 4 and short-circuits the circuit breaker 13 in the circuit to prepare for the opening.
  • the opening electromagnet 10 When opening, the opening electromagnet 10 is energized to attract the armature, and the operating lever 6 pulls the semi-static contact 3 minutes away from the initial opening position shown in FIG. 14 (c).
  • the operating lever 6 is automatically locked by the electromagnetic lock 8.
  • the electromagnet 10 At the same time as the electromagnet 10 is initially opened, it has stored energy for the compression spring sleeved on its middle core.
  • the control unit delays the opening solenoid 9 to energize the suction core, and the operating lever 5 pulls the contact 1 to separate to the opening position shown in FIG. 14 (a).
  • the operating lever 5 is automatically locked by the electromagnetic lock 7, and the normally closed contact of the auxiliary switch causes the opening electromagnet 9 to automatically power off.
  • the normally open contact of the auxiliary switch unlocks the electromagnetic lock 8 instantaneously, and the semi-static contact 3 also returns to the opening position shown in FIG. 14 (a) under the thrust of the energy storage spring in the electromagnet 10, as shown in FIG.
  • the secondary closing is ready.
  • the single-phase structure principle of the single-acting double-transfer cut-off switch is shown in Figure 15.
  • the contact unit in the figure uses The structure of the double-transferred short-open contact unit shown in FIG. 9.
  • 1 is a moving contact
  • 2 is a static contact
  • 3 is a semi-static contact
  • 4 is a transfer contact
  • 5 is an operating lever
  • 7 is an electromagnetic lock
  • 9 is a solenoid opening solenoid
  • 12 and 14 are terminals
  • 13 is a circuit breaker.
  • the static contact 2 is connected to the power supply side
  • the terminal 12 is connected to the load side.
  • One end of the core of the solenoid solenoid 9 is pressed against a closing spring. When the solenoid opens, the closing core stores energy to the closing spring to prepare for closing. It can also use E-type electromagnets or energy storage springs, electric motors, hydraulic mechanisms, etc. as the power source for operation according to the requirements of voltage level and operating stroke.
  • the cut-off switch has four stable states during operation, as shown in Figure 16.
  • (a) is the opening position
  • (b) is the closing position
  • (c) is both the initial opening position and the initial closing position.
  • the moving contact and the static contact group are all closed, and the circuit breaker 13 is short-circuited in the circuit, and it is ready for splitting.
  • the electromagnet 9 is energized to attract the moving iron core.
  • the operating lever 5 quickly pulls the contact 1 to be separated to the initial opening position shown in FIG. 16 (c).
  • the lever 5 is automatically locked by the electromagnetic lock 7 which has been powered off, and the electromagnet 9 is automatically powered off. At this time, the moving contact 1 and the semi-static contact 3 are completely separated.
  • the control unit delays the electromagnetic lock 7 to be instantaneously energized and unlocked, and at the same time, the electromagnet 9 is automatically energized and activated again
  • the operating lever 5 is automatically locked by the electromagnetic lock 7 which has been powered off, and the electromagnet 9 is automatically powered off.
  • the moving contact 1 is completely separated from the static contact 2 and the transfer contact 4, so that the circuit breaker can safely isolate the power supply.
  • the electromagnet 9 absorbs the moving iron core and stores energy for the closing spring, which is ready for the next closing. '
  • the cut-off switch has four stable states during operation, as shown in Figure 18. In the figure, (a) is the opening and closing position, (b) is the closing position, and (c) is both the opening and closing position.
  • the electromagnet 7 When closing, the electromagnet 7 is instantly energized and unlocked.
  • the moving contact 1 When the moving contact 1 is quickly closed to the initial closing position shown in FIG. 18 (c), the static contact 2 and the transfer contact 4 are closed, and the interrupter 13 is closed. Connected to the circuit. After it is automatically connected to the circuit, it is extended by the control unit.
  • the electromagnetic lock 8 When the electromagnetic lock 8 is turned on for a moment, the semi-static contact 3 is immediately closed to the moving contact 1, that is, the closing position shown in FIG. 18 (b), and the circuit breaker 13 is short-circuited in the circuit. Ready for opening.
  • the opening electromagnet 10 When opening, the opening electromagnet 10 is energized, so that the semi-static contact 3 is quickly separated to the initial opening position shown in FIG. 18 (c). After the circuit breaker 13 automatically breaks the circuit, the control unit delays the opening to the opening. The brake solenoid 9 is energized, and the movable contact 1 is separated to the opening position shown in FIG. 18 (a), which is ready for the next closing.
  • the locking device used in each of the above-mentioned operating mechanisms is a dedicated electromagnetic lock, and a permanent magnet lock with a superior performance and a faster unlocking speed can also be used.
  • the structural principles are introduced below.
  • the electromagnetic lock consists of a small solenoid electromagnet, a small spring, a small lock rod connected to the iron core, and two pairs of normally open and normally closed auxiliary contacts.
  • the structure principle is shown in Figure 19.
  • 21 is a static iron core
  • 22 is a coil
  • 23 is a moving iron core with a small lock lever
  • 24 is a small spring
  • 25 is an auxiliary contact.
  • the coil 22 is not energized
  • the small spring 24 pushes the moving iron core 23 and its small lock lever and can be automatically inserted into the lock hole of the locked mechanism.
  • the normally open contact on the auxiliary contact opens and the normally closed contact closes.
  • the moving iron core 23 is sucked into the tube and compresses the small spring 24.
  • the moving iron core pulls the small lock lever to release the lock, releases the locked mechanism, the normally open contact on the auxiliary contact closes, and the normally closed contact opens. If needed, better position sensors can be used instead of auxiliary contacts.
  • the single-coil single-lock permanent magnet lock consists of a small solenoid with permanent magnets. There is a small section of iron core in the operating lever of the locked mechanism.
  • the structure principle is shown in Figure 20 (a).
  • the iron core, 32 is a coil
  • 33 and 34 are permanent magnets
  • 35 is a moving iron core connected to an operating lever.
  • the operating lever moves, when this small section of iron core 35 enters the small solenoid, the operating lever is automatically locked by the magnetic attraction of the permanent magnet. If it is necessary to release the lock, the coil 32 of the small solenoid is energized, the electromagnetic force will cancel the permanent magnet suction, and the operating lever will be automatically released.
  • the operating lever can also have auxiliary contacts, and position sensors can be used instead of auxiliary contacts.
  • FIG. 20 (b) The structure and principle of the single-coil and double-lock permanent magnet lock are shown in Figure 20 (b).
  • 35 and 36 are two small moving iron cores connected to the operating lever. When the two moving iron cores in the operating lever are respectively When moving into the small solenoid, it can be locked separately in these two positions. It can also be designed as a permanent magnet lock with double coils and double locks.
  • the structure principle is shown in Figure 20 (c). When the moving core 35 in the operating lever moves to the position of the coil 32, it is quickly locked. If the operating lever continues to move after the coil 32 is turned on and unlocked, the moving core 35 can be quickly locked when it enters the position of the coil 37.
  • the structure and principle of the monostable permanent magnet operating mechanism is shown in Fig. 21, and two permanent magnets 41 and 42 are provided in the static iron core 44 of the solenoid electromagnet as the locking device of the opening position.
  • the closing position of the mechanism When opening, the opening coil 43 is connected with direct current, and the attracting core 45 pulls the operating lever 46 to drive the moving contact or semi-static contact to open and compress the closing spring 47 to store energy.
  • the iron core 45 is attracted to the position of the opening / closing terminal, it is automatically locked by the permanent magnets 41 and 42, the opening coil 43 is powered off, and the opening is completed.
  • the closing coil 43 is automatically unlocked by applying a reverse current. The opening coil 43 is powered off and the closing is completed.
  • Fig. 22 The structural principle of the bistable permanent magnet operating mechanism is shown in Fig. 22.
  • two permanent magnets 51 and 52 are set as the two positions of opening and closing.
  • the locking device of the device is shown in the figure.
  • the opening coil 53 When opening, the opening coil 53 is connected with direct current, which can automatically unlock the permanent magnets 51 and 52.
  • the moving iron core 56 is pulled and an operating rod 57 made of non-magnetic material is pulled to drive the contact to be opened.
  • the moving iron core 56 is automatically locked by the permanent magnets 51 and 52, the opening coil 53 is powered off, and the opening is completed.
  • the closing coil 54 When it is necessary to unlock the closing, the closing coil 54 is supplied with direct current, which can automatically unlock the permanent magnets 51 and 52, and at the same time attract the closing iron core 56 to push the operating lever 57 and the contacts to close, and move to the closing end position
  • the moving iron core 56 is automatically locked at the closing position by the permanent magnets 51 and 52, the closing coil 54 is powered off, and the closing is completed.
  • Fig. 23 The structural principle of the three-steady-state permanent magnet operating mechanism is shown in Fig. 23.
  • two permanent magnets 61 and 62 are set as the initial opening and closing gates.
  • the locking device at the three positions of initial closing and the closing position is shown in the figure.
  • a direct current is applied to the coil 64, the moving iron core 66 is pulled, and the operating lever 67 is pulled to drive the contacts to open, and the closing spring 68 is compressed to store energy.
  • the moving iron core 66 is attracted to the middle position, it is automatically locked by the permanent magnets 61 and 62, the coil 64 is powered off, and the opening is suspended.
  • the direct current is applied to the coil 63, which can automatically unlock the permanent magnets 61 and 62.
  • the moving iron core 66 is pulled again and the operating lever 67 is pulled to drive the contacts to continue to open and continue to compress and close.
  • the spring 68 stores energy.
  • the moving iron core 66 is attracted to the opening terminal position, it is automatically locked again by the permanent magnets 61 and 62, the coil 63 is powered off, and the opening is completed.
  • the coils 63 and 64 can be automatically unlocked with a reverse current at the same time.
  • the coils 63 and 64 are powered off, and the moving core is again turned by the permanent magnet 61. And 62 are automatically locked and closing is suspended.
  • a reverse current is applied to the coil 64 to automatically unlock and continue closing. The coil 64 is powered off and the closing is completed.
  • the moving iron core 80 When the moving iron core 80 is attracted to the closed position of the coil 77, it is automatically locked by the permanent magnets 73 and 74, the coils 76 and 77 are respectively powered off, and the opening is suspended.
  • the coil 77 passes a reverse current to unlock the moving iron core 80, and at the same time, the coil 75 passes the DC current to attract the moving iron core 79, and continues to pull the operating lever 71 to drive the contact to continue to open.
  • the moving iron core 79 When the moving iron core 79 is attracted to the opening terminal position, it is automatically locked again by the permanent magnets 71 and 72, the coils 77 and 75 are respectively powered off, and the opening is completed.
  • the coil 75 When it is necessary to unlock and close, the coil 75 is energized to unlock the movable lock core 79, and at the same time, the coil 77 is energized to attract and close the movable iron core 80, and push the operating lever to drive the contact to close.
  • the moving iron core 80 When the moving iron core 80 is attracted to the closed position of the coil 77, it is automatically locked by the permanent magnets 73 and 74, the coils 75 and 77 are respectively powered off, and the closing is suspended.
  • the coil 77 passes a reverse current to unlock the moving iron core 80.
  • the coil 76 is energized to attract the moving iron core 79 and push the operating lever to drive the contact to continue closing.
  • the moving iron core 79 is attracted to When the closed position of the coil 76, that is, the closing end position, is automatically locked by the permanent magnets 71 and 72 and 73 and 74, the coils 76 and 77 are respectively powered off, and the closing is completed.
  • the semi-static contact 3 When an electromagnetic lock is used on the semi-static contact, as shown in Figs. 11 and 13, the semi-static contact 3 is not locked when it is ready to be closed, and it is only pushed by this by the back pressure spring. The moment when the moving contact 1 and the semi-static contact 3 are in contact when they are closed, it may cause the semi-static contact 3 to undergo a back-and-forth telescopic bounce motion, which may cause an arc. This is not allowed.
  • the head 3 can eliminate the bounce movement of the semi-static contact during the initial contact.
  • FIG. 25 The structural principle of the anti-bounce automatic locking device is shown in Figure 25.
  • the position shown in the figure and the arrangement of the static contact groups of each phase are installed vertically. Only an automatic locking device can be installed at the semi-static contact of the middle phase.
  • 91 and 92 are the blades clamped on both sides of the moving contact
  • 90 is the insulated plug on the outside
  • 5 is the operating lever on the moving contact.
  • 3 is a semi-static contact
  • 6 is its operating lever.
  • 93 and 94 are two insulated sliding locks on the automatic locking device
  • 95 and 96 are compression springs on both sides
  • 97 is an insulating base.
  • the blades 91 and 92 on both sides of the moving contact are first inserted and clamped to the semi-static contact 3 which has been locked by the automatic locking device, to prevent the semi-static contact from bouncing.
  • the phase and half static contacts are connected to the same operating lever 6, so no contact bounce occurs in three phases.
  • the insulating plugs 90 on both sides of the moving contact are inserted into the insulating sliding locks 93 and 94 on the locking device.
  • the sliding lock can be automatically unlocked at the same time. Quick response at opening is ready.
  • the semi-static contact is reset to the ready-to-close position after opening, the semi-static contact 3 can automatically lift the sliding locks 93 and 94 and be automatically locked, preparing for the anti-bounce when closing.
  • a permanent magnet lock with a double locking position can be adopted.
  • a single coil double locking permanent magnet lock or a double coil double locking permanent magnet lock can be selected respectively. See Figure 20 (b) and Figure 20 (c). Setting a suitable moving iron core at the appropriate position of the operating lever of the semi-static contact can automatically lock the ready-to-close position and the initial opening position of the semi-static contact respectively, which can prevent the semi-static contact from bouncing when closing. Can guarantee the step-by-step operation of program control when opening.
  • the single-position permanent magnet lock can also be used on the semi-static contact, as shown in Figure 20 (a), which is used to lock the initial opening position.
  • an anti-bouncing automatic locking device needs to be installed, as shown in the structure shown in Figure 25.
  • a bistable permanent-magnet operation mechanism can be directly used, as shown in the structure shown in FIG.
  • the need for bounce of semi-static contacts during braking and the step-by-step operation of program control during opening It is also possible to use a monostable open permanent magnet operating mechanism, as shown in the structure shown in Figure 21, but it is necessary to add an anti-bounce automatic lock or a single-lock permanent magnet lock.
  • the cut-off switch invented in this paper can meet the needs of AC / DC power grids of various voltage levels, and can also meet the requirements of breaking various load currents. However, it is not very ideal for short-circuit current-limiting interruption.
  • a current-limiting switch will be designed in another article, which can be used for current-limiting interruption of short-circuit current.
  • the medium in the contact unit of the interrupt switch uses ordinary air, which can replace the existing medium-voltage circuit breaker, and replace the large-capacity low-voltage circuit breaker and contactor.
  • the requirements for insulation and withstand voltage become higher, the contact opening distance becomes larger and larger, and the stroke when the moving contact opens and closes becomes larger.
  • the operating strokes of various power sources have certain restrictions.
  • the moving strokes of the moving iron cores of E-type and U-type electromagnets are relatively short.
  • the moving stroke of the moving iron core can be longer than that of the E and U types, and the moving stroke of the spring, the motor and the hydraulic operating mechanism can be longer than that of the solenoid type electromagnetic operating mechanism.
  • Two simple methods for changing the contact stroke are introduced below. Through these two methods, the interrupt switch can be applied to the circuit of ultra-high voltage and ultra-high voltage. The higher the voltage level, the better the superiority of the interrupt switch can be shown. 4. 9. 1 Method of Enlarging Contact Stroke
  • the three-phase contacts can be placed in an insulating medium, such as insulating oil, SF 6 or other medium.
  • an insulating medium such as insulating oil, SF 6 or other medium.
  • the contact medium of a traditional switch is mainly designed with its arc extinguishing performance in mind when designing and selecting it, and its insulation performance is considered next.
  • the contact medium of the cut-off switch mainly considers its insulation performance when designing and selecting, and there is no special requirement for its arc extinguishing performance.
  • the auxiliary switch of the cut-off switch can be provided with a pair or two pairs of normally open and normally closed contacts at the opening and closing positions at both ends of the operating lever, as shown in Figure 26.
  • the operating lever 5 is in the closing position, and its link can make the contact HW of the auxiliary position auxiliary switch act; when the operating lever is moved to the left to the opening position, the contact FW of the opening position auxiliary switch can be actuated.
  • auxiliary switches 1FW, 1HW and 2FW, 2HW of the opening and closing positions of the moving contact and the semi-static contact can be respectively set as required.
  • the contacts of these auxiliary switches can also be replaced with better position sensors.
  • the control unit can be divided into four kinds of operation control principles according to the type of switch mechanism: a. Single operation single transfer control, b. Double operation single transfer control, c. Single operation double transfer control, d, Double operation double transfer control.
  • the above control principle adopts relay control, and it can also adopt more superior PC control to compile a simple fool-type program control unit.
  • the working principle of the control circuit shown in Figure 27 ⁇ 30 and the current interruption described in this article 4. 2 ⁇ 4. 5 The working principle of the switch is basically the same, and the action process and operation sequence of the relay are the same.
  • the control circuits shown in Figures 27 and 28 are suitable for use with mercury, sodium, fuses and PTC interrupters.
  • the control circuits shown in Figures 29 and 30 are suitable for use with thyristors, micro-actions, seesaws, Electrically and magnetically controlled interrupters.
  • the various types of cut-off switches designed by the present invention are suitable for opening and closing control of power lines with low, medium, high, ultra, and extra-voltage levels and various system capacities, respectively, and can meet the needs of modernization of power grids. .

Landscapes

  • Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)

Abstract

Le disjoncteur de la présente invention est conçu conformément à la théorie de non production d'arc électrique et conformément à un ensemble de théories relatives à l'ouverture de circuits. Il constitue une avancée considérable par rapport aux disjoncteurs conformes à l'ancienne théorie de conception et permet d'atteindre un nouveau niveau. Ce disjoncteur comprend une unité de coupure, une unité de contact, une structure de commutation et une unité de commande. L'unité de coupure peut ouvrir le circuit sans arc électrique ou avec dérivation de l'arc électrique. L'unité de contact peut permettre le passage du courant sans arc électrique ou avec un arc électrique faible. La structure de commutation est petite et simple. L'unité de commande peut faciliter la programmation de la commande. Ce disjoncteur peut satisfaire les exigences d'un réseau électrique moderne et il peut remplacer les disjoncteurs et commutateurs-contacteurs mis en oeuvre pour tous les types de niveaux de tension actuels.
PCT/CN2002/000773 2001-11-05 2002-10-31 Disjoncteur WO2003060939A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2002344034A AU2002344034A1 (en) 2001-11-05 2002-10-31 Circuit breaker

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Application Number Priority Date Filing Date Title
CN01134456.3 2001-11-05
CN 01134456 CN1234140C (zh) 2001-11-05 2001-11-05 断流开关

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WO2003060939A1 true WO2003060939A1 (fr) 2003-07-24

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Cited By (1)

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US20220230825A1 (en) * 2019-12-05 2022-07-21 S&C Electric Company Low energy reclosing pulse test

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EP3264435B1 (fr) * 2016-06-27 2019-04-24 ABB Schweiz AG Interrupteur ou disjoncteur moyenne tension
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CN109148181B (zh) * 2018-09-12 2019-11-12 浙江润成合金材料科技有限公司 一种楼道控制开关
DE102018222466B4 (de) * 2018-12-20 2020-10-29 Audi Ag Schütz für ein Elektrofahrzeug und Elektrofahrzeug
CN112965401B (zh) * 2021-02-08 2022-08-26 中国南方电网有限责任公司超高压输电公司检修试验中心 变压器防火防爆物理校核试验用大电流控制装置及方法
CN113628904A (zh) * 2021-08-13 2021-11-09 广东电网有限责任公司电力调度控制中心 一种蓄能电厂开停机自动闭锁的方法
WO2023041961A1 (fr) * 2021-09-20 2023-03-23 郑宇程 Contacteur

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2041865U (zh) * 1988-07-09 1989-07-26 安承豪 用电控制自动开关
CN1006940B (zh) * 1985-07-11 1990-02-21 通用电气公司 无电弧的电路中断器
CN2085092U (zh) * 1991-03-01 1991-09-18 赵为政 交流灭弧电子模块
CN1081533A (zh) * 1993-04-12 1994-02-02 武汉开关总厂 触头型无弧断路器
CN1271955A (zh) * 1999-04-23 2000-11-01 肖新凯 有电弧转移触头的长寿命省银开关电器
CN1290020A (zh) * 1999-09-27 2001-04-04 三菱电机株式会社 电路断路器

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1006940B (zh) * 1985-07-11 1990-02-21 通用电气公司 无电弧的电路中断器
CN2041865U (zh) * 1988-07-09 1989-07-26 安承豪 用电控制自动开关
CN2085092U (zh) * 1991-03-01 1991-09-18 赵为政 交流灭弧电子模块
CN1081533A (zh) * 1993-04-12 1994-02-02 武汉开关总厂 触头型无弧断路器
CN1271955A (zh) * 1999-04-23 2000-11-01 肖新凯 有电弧转移触头的长寿命省银开关电器
CN1290020A (zh) * 1999-09-27 2001-04-04 三菱电机株式会社 电路断路器

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20220230825A1 (en) * 2019-12-05 2022-07-21 S&C Electric Company Low energy reclosing pulse test
US11670471B2 (en) * 2019-12-05 2023-06-06 S&C Electric Company Low energy reclosing pulse test

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AU2002344034A1 (en) 2003-07-30
CN1417818A (zh) 2003-05-14

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