CN1464611A - Hybrid power capacitor switch mould train - Google Patents
Hybrid power capacitor switch mould train Download PDFInfo
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- CN1464611A CN1464611A CN 02123324 CN02123324A CN1464611A CN 1464611 A CN1464611 A CN 1464611A CN 02123324 CN02123324 CN 02123324 CN 02123324 A CN02123324 A CN 02123324A CN 1464611 A CN1464611 A CN 1464611A
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- switch
- power capacitor
- hybrid power
- thyristor
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
A mixed type power capacitor switch module comprising a control circuit, a lock fluid switch and a solenoid switch connected in parallel to control the power capacitor to engage into the feeder line of the distributed system or not. The control circuit generates the switch control signals having a time gap output to the solenoid switch and the lock fluid switch respectively. When the control circuit receives the input signal, the lock fluid switch capable of precisely controlling the conducting time is used to prevent the power capacitor from producing excessive onflow current when engaging, then the solenoid switch is conducted to disenable the lock fluid switch. When the control circuit receives the disengaging control signal, it first cuts-off the solenoid switch, then cuts-off the lock fluid switch, as a result the lock fluid switch will be cut-off automatically when the approaches zero, thus the solenoid switch produces no electric arc when disengaged.
Description
Technical field
The present invention relates to the switch module in the electrical power trans mission/distribution system, especially a kind of hybrid power capacitor switch module, it is in parallel and form the hybrid power capacitor switch module to thyristor and electromagnetic switch respectively that it utilizes control circuit to produce free poor switch controlling signal.
Background technology
Most load is an inductive in the electrical power trans mission/distribution system of commonly using, its cause lower backward merit because of, often need bigger electric current can transmit identical real power, thereby reduce the efficiency of transmission of this electrical power trans mission/distribution system, and increase the voltage regulation of load end.Utilities Electric Co. or user be in order to overcome foregoing problems, generally on electrical power trans mission/distribution system, add the power capacitor group or automatically merit because of adjuster so that leading merit is provided thus improve whole merit because of.According to research, the electrification capacitor volume accounts for 25% to 35% of electric power system total capacity in the electrical power trans mission/distribution system; Some system even up to 50%.
The power capacitor group of commonly using is to utilize an electromagnetic switch to control this power capacitor to select to drop into or cut off feeder line in electrical power trans mission/distribution system.Yet this electromagnetic switch operate time need several milliseconds to ten several milliseconds, and it can't precisely be controlled the power capacitor input or cut off the time, and the voltage and the current relationship of this power capacitor are as follows:
Learn by following formula, the power capacitor electric current is directly proportional with differential value across condenser voltage, power capacitor is the voltage difference (being switch cross-over connection voltage) between this power capacitor and feeder line at the cross-over connection voltage that drops into moment, therefore if the input of this power capacitor is when moment, voltage difference was not zero between power capacitor and feeder line, to make terminal voltage moment of power capacitor that one variable quantity is arranged because of the input of switch, this will cause this power capacitor to produce sizable inrush current dropping into moment, with the shortening capatcitor life-span, produce bigger transient state switching current, and the electromagnetic switch that must select big rated capacity for use is to bear big transient current; In addition when this power capacitor cuts off, cut off when equalling zero because electromagnetic switch can't accurately be controlled the electric current of this power capacitor, thereby on the electromagnetic switch contact, can cause electric arc when cutting off, this electric arc will shorten the life-span of this electromagnetic switch.No matter and the inrush current when dropping into or when cutting off the transient state high pressure all can influence power capacitor useful life.
Because the progress of semiconductor technology, commonly use and to be applied to the switch that power capacitor makes to drop into or cut off the electrical power trans mission/distribution system feeder line by thyristor high voltage withstanding and big electric current, because this thyristor has very fast ON time (only counting microsecond to tens of microseconds), make the switch of this thyristor can accurately be controlled at power capacitor cross-over connection voltage near zero the time, when being power capacitor identical with the electrical power trans mission/distribution system feeder voltage (switching voltage is zero), this power capacitor is dropped into the feeder line of this distribution system, the inrush current when dropping into to reduce this power capacitor; Because this thyristor switch do not have the mechanical type contact, and can cut off automatically near zero the time at the electric current of power capacitor, therefore cutting off Shi Buhui causes electric arc.Yet, during this thyristor switch conduction, often produce three ten-day period of hot season spy's voltage drop, because when this power capacitor drops into this electrical power trans mission/distribution system, the electric current of this power capacitor is according to compensation virtual work amount and decide, produces tens of electric currents to hundreds of amperes this thyristor that stimulates the menstrual flow at least, so will produce many power losss on this thyristor switch, these power losss will cause the temperature rise of this thyristor switch, for avoiding the overheated need of thyristor bulky heat abstractor will be set additionally.Therefore utilize this thyristor will be lower than with the switchgear of electromagnetic switch, and its volume is also bigger as power capacitor as the whole efficiency of this power capacitor switch equipment of control.
Summary of the invention
In view of this, the invention provides a kind of hybrid power capacitor switch module in conjunction with electromagnetic switch and thyristor switch, it utilizes control circuit to produce free poor switch controlling signal and gives thyristor switch and electromagnetic switch respectively, when dropping into, capacitor precisely controls the ON time of this thyristor switch earlier, inrush current when dropping into to reduce power capacitor, so the rated capacity of the electromagnetic switch in the mixed switch is little can select to use electromagnetic switch more separately the time; Conducting electromagnetic switch immediately behind the thyristor switch conduction, electromagnetic switch conducting back brake fluid switch is promptly ineffective, the present invention is had avoid electric current to flow through this thyristor switch for a long time and consume more electric power, therefore can save bulky heat abstractor, and and then promote the efficient of whole virtual work bucking-out system; In addition, control circuit of the present invention is opened electromagnetic switch earlier when cutting off power capacitor, thyristor is with restitution simultaneously, make power capacitor electric current this thyristor switch of flowing through, so electromagnetic switch will can not produce electric arc when opening, therefore can prolong the electromagnetic switch life-span, this thyristor switch can end naturally near zero the time and power capacitor is cut off feeder line in electrical power trans mission/distribution system at the power capacitor electric current after electromagnetic switch is opened.In addition and since when using capacitor of the present invention to drop into inrush current with by the time the transient state high pressure all obviously be suppressed, therefore can guarantee that power capacitor does not influence its life-span because of switch motion.
Main purpose of the present invention provides a kind of hybrid power capacitor switch module, it utilizes a thyristor switch and an electromagnetic switch parallel connection as power capacitor input or the switch that cuts off, it utilizes a control circuit after receiving the input signal, precisely control the ON time of this thyristor switch earlier, inrush current when dropping into to reduce power capacitor, therefore can prolong life of capacitors, and this electromagnetic switch can be selected less rated capacity for use.
Secondary objective of the present invention provides a kind of hybrid power capacitor switch module, the switch that it utilizes a thyristor switch and an electromagnetic switch parallel connection to be used as the power capacitor input or to cut off, because conducting electromagnetic switch immediately behind this thyristor switch conduction, promptly ineffective at electromagnetic switch conducting back brake fluid switch, this thyristor on-off action time has only several power cycles, therefore this thyristor switch can be selected less rated capacity for use and extra heat abstractor need not be set, thereby can promote the efficient of whole virtual work bucking-out system.
Another purpose of the present invention provides a kind of hybrid power capacitor switch module, after it utilizes a control circuit to receive the control signal that cuts off, drive signal with this electromagnetic switch removes earlier, when electromagnetic switch is recovered action simultaneously by the time gating fluid switch, therefore can avoid electromagnetic switch when cutting off, to cause electric arc, after ending, electromagnetic switch removes the drive signal of thyristor switch again, this thyristor switch is ended when current zero is handed over more naturally, make the present invention can prolong the useful life of this capacitor and electromagnetic switch.
For reaching above-mentioned purpose, a kind of hybrid power capacitor switch module of the present invention comprises: a control circuit, and its receiving key control signal also produces the drive signal of this hybrid power capacitor switch module; One thyristor switch supplies to receive the input of this control circuit or cut off control signal; One electromagnetic switch is parallel to this thyristor switch; When this control circuit receives this input control signal, this thyristor switch of ON time can be accurately controlled in elder generation's utilization, make this power capacitor when dropping into, can not produce excessive inrush current, this electromagnetic switch of conducting more subsequently, electromagnetic switch conducting back brake fluid switch is just ineffective; When this control circuit receives this and cuts off control signal, earlier after this electromagnetic switch, this moment, the thyristor switch was conducting, so electromagnetic switch is cutting off Shi Buhui generation electric arc, after this electromagnetic switch is ended, again by this thyristor switch, this thyristor switch will end near zero the time naturally at electric current.
Above-mentioned control circuit can comprise a pulse wave signal generator, D type device, one and lock, an electromagnetic switch drive circuit, a delay circuit, one or a lock and a thyristor drive circuit anyway.
Above-mentioned control circuit also has a kind of embodiment to be: comprise a pulse wave signal generator, a D type flip-flop, a delay circuit, an anti-lock, one and lock, an electromagnetic switch drive circuit, one first one shots, one second one shots, one or a lock and a thyristor drive circuit.
Effect intentionally of the present invention is:
1, saved bulky heat abstractor;
2, promoted the efficient of whole virtual work bucking-out system;
3, prolonged the useful life of capacitor and electromagnetic switch.
Description of drawings
Fig. 1: the circuit diagram of hybrid power capacitor switch module framework of the present invention;
Fig. 2: the control calcspar of first preferred embodiment of hybrid power capacitor switch module framework of the present invention;
Fig. 3: the detailed circuit diagram of first preferred embodiment of hybrid power capacitor switch module framework of the present invention;
Fig. 4: the control calcspar of second preferred embodiment of hybrid power capacitor switch module framework of the present invention;
Fig. 5: the detailed circuit diagram of second preferred embodiment of hybrid power capacitor switch module framework of the present invention;
Fig. 6: hybrid power capacitor switch module of the present invention is connected with power capacitor and is applied to the circuit diagram of single phase system;
Fig. 7: hybrid power capacitor switch module of the present invention is applied to the circuit diagram of the three-phase three wire system of power capacitor Y type wiring;
Fig. 8: hybrid power capacitor switch module of the present invention is applied to the circuit diagram of the three-phase three wire system of power capacitor delta connection;
Fig. 9: hybrid power capacitor switch module of the present invention is applied to the circuit diagram of three-phase four wire system.
Embodiment
Fig. 1 discloses the circuit diagram of hybrid power capacitor switch module framework of the present invention, please refer to shown in Figure 1, it discloses hybrid power capacitor switch module of the present invention and comprises a control circuit 1, a thyristor switch 2 and an electromagnetic switch 3, and this thyristor switch 2 and electromagnetic switch 3 form in parallel.
Fig. 2 and Fig. 3 disclose the control calcspar and the detailed circuit diagram of first preferred embodiment of hybrid power capacitor switch module framework of the present invention; Please refer to Fig. 2, shown in Figure 3, it discloses first preferred embodiment of hybrid power capacitor switch module of the present invention, and it comprises a pulse wave signal generator 10, a D type flip-flop 11, one and lock 12, an electromagnetic switch drive circuit 13, a delay circuit 14, one or a lock 15 and a thyristor drive circuit 16.The cross-over connection voltage of this control circuit 1 main acquisition switch module, export this voltage signal to this pulse wave signal generator 10, the place produces a pulse wave signal at the cross-over connection point of zero voltage, this pulse wave signal is delivered to this D type flip-flop 11 be used as a clock pulse signal (CLK), the outside is sent the input D that a switch controlling signal that comes is then received this D type flip-flop 11 to, and the output signal of this D type flip-flop is delivered to this and lock 12, the another one input that should reach lock 12 is these switch controlling signals, the output signal that should reach lock 12 is delivered to this electromagnetic switch drive circuit 13, should reach lock 12 and also export this delay circuit 14 to, 14 outputs of this delay circuit with should and lock 12 outputs deliver to again should or lock 15, be somebody's turn to do or lock 15 outputs signal to this thyristor drive circuit 16.When this switch controlling signal will drop into this power capacitor for the high levle interval scale, therefore the input D of this D type flip-flop 11 is a high levle, the output not transition as yet of this flip-flop 11 at this moment, wait until when the voltage of cross-over connection on this switch module is zero potential, this pulse wave signal generator 10 just can produce pulse wave and deliver to the clock pulse of this flip-flop 11 (CLK) input, it is high levle that transition is just understood in the output of this flip-flop 11, this moment should and 12 two inputs of lock be high levle and make the output of this and lock 12 also be high levle, should or the output of lock 15 also be high levle, to trigger this thyristor switch 2 and electromagnetic switch 3 this moment simultaneously, because the response speed of this thyristor switch 2 is very fast, so this thyristor switch 2 can be at switch module cross-over connection voltage near zero moment conducting, and the response speed of this electromagnetic switch 3 is slower, conducting after so this electromagnetic switch 3 can postpone several milliseconds or ten several milliseconds, because this power capacitor drops into the situation that moment does not have voltage instantaneous to change, therefore can not produce big inrush current, make the present invention can select the electromagnetic switch of less rated capacity for use.After electromagnetic switch 3 conductings since the impedance of this electromagnetic switch 3 much smaller than the impedance of this thyristor switch 2, and this electromagnetic switch 3 and thyristor switch 2 form in parallel, with the steady-state current that the makes capacitor electromagnetic switch 3 of almost all flowing through, avoid bulky heat abstractor problem with the power consumption that reduces this thyristor switch 2, and then promote the whole efficiency of this hybrid power capacitor switch module.After this control circuit 1 receiving condenser cuts off control signal, earlier by this electromagnetic switch drive circuit 13, again by this thyristor drive circuit 16.When this switch controlling signal will cut off this power capacitor for the low level interval scale, should reach lock 12 outputs becomes low level at once and ends this electromagnetic switch 3, because these 3 response times of electromagnetic switch are slower, so this thyristor switch 2 must postpone a period of time and end, the time of its delay is by these delay circuit 14 decisions, the time that postpones must grow can guarantee this electromagnetic switch 3 end earlier after this thyristor switch 2 just drop at electric current subsequently and end naturally when zero, therefore on these electromagnetic switch 3 contacts, produce electric arc in the time of can avoiding cutting off, make the present invention can prolong the useful life of this power capacitor and electromagnetic switch.
Fig. 4, Fig. 5 disclose the control calcspar and the detailed circuit diagram of second preferred embodiment of hybrid power capacitor switch module framework of the present invention respectively; Please refer to shown in Fig. 4,5, the control square of second preferred embodiment of hybrid power capacitor switch module of the present invention comprises the anti-lock of a pulse wave signal generator 20, a D type flip-flop 21, a delay circuit 22, one 23, one and lock 24, an electromagnetic switch drive circuit 25, one first one shots 26, one second one shots 27, one or a lock 28 and a thyristor drive circuit 29.This control circuit mainly captures the cross-over connection voltage of switch module, export this voltage signal to this pulse wave signal generator 20, the place produces a pulse wave signal at the cross-over connection point of zero voltage, this pulse wave signal is delivered to this D type flip-flop 21 be used as a clock pulse signal (CLK), the outside is sent the input D that a switch controlling signal that comes is then received this D type flip-flop 21 to, and the output signal of this D type flip-flop 21 is delivered to this first one shots 26, this switch controlling signal is also delivered to this anti-lock 23, this second one shots 27 is delivered in these anti-lock 23 outputs, this or lock 28 are delivered in the output of this first one shots 26 and second one shots 27, this or lock 28 output signal to this thyristor drive circuit 29, this switch controlling signal is also delivered to this delay circuit 22,22 outputs of this delay circuit and this switch controlling signal deliver to should and lock 24, this output signal that reaches lock 24 is delivered to this electromagnetic switch drive circuit 25.When this switch controlling signal will drop into this power capacitor for the high levle interval scale, therefore the input D of this D type flip-flop 21 is a high levle, the output not transition as yet of this flip-flop 21 at this moment, wait until when the voltage of cross-over connection on this switch module is zero potential, this pulse wave signal generator 20 just can produce pulse wave and deliver to the clock pulse of this flip-flop 21 (CLk) input, it is that high levle forms a positive edge signal that transition is just understood in the output of this flip-flop 21, this positive edge signal is delivered to this first one shots 26, and to produce a time width be first to click the high levle signal of time span, this time width is that the first high levle signal of clicking time span is delivered to this or lock 28, therefore should or lock 28 outputs be high levle immediately, this high levle signal is delivered to thyristor drive circuit 29 and can be triggered this thyristor switch 2 at this moment, because the response speed of this thyristor switch 2 is very fast, so this thyristor switch 2 can be at switch module cross-over connection voltage near zero moment conducting, therefore the inrush current in the time of can significantly reducing the power capacitor input, and the switch controlling signal of this high levle is delivered to this and lock 24 through a delay circuit 22, should reach the switch controlling signal that lock 24 another ones are input as this high levle, therefore this electromagnetic switch 3 just can be driven after will postpone a period of time, to prevent that electromagnetic switch 3 is than the 2 fast conductings of thyristor switch, particularly be applied in three-phase system, because thyristor switch 2 must be waited for switch cross-over connection voltage and could drop into when being zero, and because three-phase thyristor switch must drop into respectively, therefore, transfer high levle to from switch controlling signal and drop into fully to three-phase thyristor switch that may to need to surpass half power supply expired, so elect a power cycle time of delay of this delay circuit 22 as.Because after these electromagnetic switch 3 conductings, the effect of this thyristor switch 2 just can disappear, therefore the time that must drop into fully greater than electromagnetic switch time of clicking of this first one shots, must consider the bounce of this electromagnetic switch especially, therefore may be selected to be three to four power cycles, this thyristor switch 2 is just ineffective after the output of this first one shots 26 is returned to low level, three to four power cycles of i.e. 2 maximum the conductings of this thyristor switch of meaning, therefore can not consider heat dissipation problem, so avoid bulky heat abstractor problem, and then promote the whole efficiency of this hybrid power capacitor switch module, and can not produce big inrush current when dropping into, make the present invention can select the electromagnetic switch of less rated capacity for use owing to power capacitor.When this switch controlling signal will cut off this power capacitor for the low level interval scale, this switch controlling signal is changed into low level by high levle negative edge will produce a positive edge signal and remove to trigger this second one shots 27 behind anti-lock 23, it is second to click the high levle signal of time span that this second one shots 27 will produce a time width, this time width is that the second high levle signal of clicking time span is delivered to this or lock 28, therefore should or lock 28 outputs be high levle immediately, this high levle signal is delivered to thyristor drive circuit 29 and can be triggered this thyristor switch 2 immediately more at this moment, therefore this thyristor switch 2 conducting once again, and because this switch controlling signal is a low level, should reach lock 24 outputs becomes low level at once and ends this electromagnetic switch 3, because these 3 response times of electromagnetic switch are slower, so this thyristor switch 2 of conducting must postpone a period of time and ends again, the time of its delay second clicks second of road circuit 27 and clicks the time for this, the time that postpones must grow can guarantee this electromagnetic switch 3 end earlier after this thyristor switch 2 just drop at electric current subsequently and end naturally when zero, therefore on these electromagnetic switch 3 contacts, produce electric arc in the time of can avoiding cutting off, make the present invention can prolong the useful life of this power capacitor and electromagnetic switch.
When Fig. 6 disclosed hybrid power capacitor switch module of the present invention and is applied to single phase system, this hybrid power capacitor switch module was directly connected with power capacitor.Fig. 7, Fig. 8 disclose hybrid power capacitor switch module of the present invention respectively and are applied to three-phase three wire system, no matter the mode of connection at the three-phase three wire system capacitor is that Y or △ connect, all only must be serially connected with a two-phase by two cover hybrid power capacitor switch modules, also can use three cover hybrid power capacitor switch modules to be serially connected with three-phase respectively certainly.Fig. 9 discloses hybrid power capacitor switch module of the present invention and is applied to three-phase four wire system, and it must use three cover hybrid power capacitor switch modules to be serially connected on the three-phase respectively.
The above embodiment only is explanation technological thought of the present invention and characteristics, its purpose makes the personage who has the knack of this skill can understand content of the present invention and is implementing according to this, when not limiting claim of the present invention with it, promptly the equalization of doing according to disclosed spirit generally changes or modifies, and must be encompassed in the claim scope of the present invention.
Claims (7)
1, a kind of hybrid power capacitor switch module, it is characterized in that: it comprises:
One control circuit, its receiving key control signal also produces the drive signal of this hybrid power capacitor switch module;
One thyristor switch supplies to receive the input of this control circuit or cut off control signal;
One electromagnetic switch is parallel to this thyristor switch;
When this control circuit receives this input control signal, this thyristor switch of ON time can be accurately controlled in elder generation's utilization, make this power capacitor when dropping into, can not produce excessive inrush current, this electromagnetic switch of conducting more subsequently, electromagnetic switch conducting back brake fluid switch is just ineffective;
When this control circuit receives this and cuts off control signal, earlier after this electromagnetic switch, this moment, the thyristor switch was conducting, so electromagnetic switch is cutting off Shi Buhui generation electric arc, after this electromagnetic switch is ended, again by this thyristor switch, this thyristor switch will end near zero the time naturally at electric current.
2, hybrid power capacitor switch module as claimed in claim 1 is characterized in that: this control circuit comprises a pulse wave signal generator, D type device, one and lock, an electromagnetic switch drive circuit, a delay circuit, one or a lock and a thyristor drive circuit anyway.
3, hybrid power capacitor switch module as claimed in claim 1 is characterized in that: this control circuit comprises a pulse wave signal generator, a D type flip-flop, a delay circuit, an anti-lock, one and lock, an electromagnetic switch drive circuit, one first one shots, one second one shots, one or a lock and a thyristor drive circuit.
4, hybrid power capacitor switch module as claimed in claim 1 is characterized in that: when this hybrid power capacitor switch module was applied to single phase system, this hybrid power capacitor switch module was directly connected with capacitor.
5, hybrid power capacitor switch module as claimed in claim 1, it is characterized in that: when this hybrid power capacitor switch module is applied to three-phase three wire system, connect no matter the mode of connection of capacitor is Y or △, can select for use two cover mixed switch modules to be serially connected with and appoint two-phase circuit.
6, hybrid power capacitor switch module as claimed in claim 1, it is characterized in that: when this hybrid power capacitor switch module is applied to three-phase three wire system, connect no matter the mode of connection of capacitor is Y or △, can select for use three cover mixed switch modules directly to be serially connected with this three-phase circuit.
7, hybrid power capacitor switch module as claimed in claim 1 is characterized in that: when this hybrid power capacitor switch module is applied to three-phase four wire system, three cover mixed switch modules are serially connected in three-phase circuit respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123324 CN1464611A (en) | 2002-06-18 | 2002-06-18 | Hybrid power capacitor switch mould train |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 02123324 CN1464611A (en) | 2002-06-18 | 2002-06-18 | Hybrid power capacitor switch mould train |
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| Publication Number | Publication Date |
|---|---|
| CN1464611A true CN1464611A (en) | 2003-12-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 02123324 Pending CN1464611A (en) | 2002-06-18 | 2002-06-18 | Hybrid power capacitor switch mould train |
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| CN (1) | CN1464611A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201673A (en) * | 2010-03-24 | 2011-09-28 | 北京博电新能电力科技有限公司 | Switching device and method for cutting in and cutting off power equipment for power grid system |
| CN105634455A (en) * | 2014-09-02 | 2016-06-01 | 盈正豫顺电子股份有限公司 | Fast cut-off device of thyristor alternating current switch and operation method thereof |
| CN106571800A (en) * | 2016-10-31 | 2017-04-19 | 国家电网公司 | Three-phase switch |
-
2002
- 2002-06-18 CN CN 02123324 patent/CN1464611A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102201673A (en) * | 2010-03-24 | 2011-09-28 | 北京博电新能电力科技有限公司 | Switching device and method for cutting in and cutting off power equipment for power grid system |
| CN105634455A (en) * | 2014-09-02 | 2016-06-01 | 盈正豫顺电子股份有限公司 | Fast cut-off device of thyristor alternating current switch and operation method thereof |
| CN105634455B (en) * | 2014-09-02 | 2018-10-02 | 盈正豫顺电子股份有限公司 | Fast cut-off device of thyristor alternating current switch and operation method thereof |
| CN106571800A (en) * | 2016-10-31 | 2017-04-19 | 国家电网公司 | Three-phase switch |
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Owner name: ABLEREX ELECTRONIC CO., LTD. Free format text: FORMER OWNER: YINGZI CO., LTD. Effective date: 20021101 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20021101 Applicant after: Yingzheng Yushun Electronics Co., Ltd. Applicant before: British Enterprises Limited |
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| WD01 | Invention patent application deemed withdrawn after publication |