CN201741014U - Three-step soft switch - Google Patents
Three-step soft switch Download PDFInfo
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- CN201741014U CN201741014U CN2009201089638U CN200920108963U CN201741014U CN 201741014 U CN201741014 U CN 201741014U CN 2009201089638 U CN2009201089638 U CN 2009201089638U CN 200920108963 U CN200920108963 U CN 200920108963U CN 201741014 U CN201741014 U CN 201741014U
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- switch
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- soft
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- contact switch
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Abstract
The utility model relates to a three-step soft switch, which belongs to a novel load switch capable of completely soft conducting and soft cutting of load current without arc according to three steps of procedures. The three-step soft switch is formed by contact switches and contactless switches through serial and parallel connection. The contact switches use three sequentially acting contacts to give out three-step procedure signals, each step of soft operation for switching on and switching off circuits without arc can be completed through the contactless switches, and the transmission of load current an be carried out by the contact switches. Because of the adoption of a measure of carrying out the interlocking through the contact switches, the conduction can be automatically stopped when fault occurs inside the three-step soft switch, and arc can not be generated, so the accidents caused by continuous operation of the three-step soft switch can be prevented.
Description
(1) technical field:
Three step of the utility model, soft switch related to a kind of novel load switch that is used to connect or cut off load current, and three steps, soft switch was to be made of by connection in series-parallel contact switch and noncontacting switch; The contact switch of wherein bearing the traffic load electric current, send three step program singals of changing-over circuit and carrying out interlock protection has contactor, isolating switch, relay, fuse, near switch, mercury cut-off, air switch, vacuum switch, drum controller, automatic switch; Wherein bear the noncontacting switch that soft operation is carried out in the switching of load current have by SCR, TRIAC, ASCR, IGBT, IGCT, SGCT, GTO, GTR, MOSFET, SIT, SITH, MCT, MGT constitute single, double to noncontacting switch that is electronic switch.
(2) background technology:
Existing " electromechanical integral switch " (patent No. 200520005260.4) though concentrated has, noncontacting switch both sides' advantage, can realize not having the function of electric arc and soft operation, if but when breaking down, continues by the electronic switch in them operation, and they all may produce electric arc and cause major accident.
(3) summary of the invention:
In order to overcome the defective of " electromechanical integral switch ", four contact switches have been increased in the soft switch of three steps as the auxiliary interlock protection of electronic switch and selected signal lamp for use.As shown in Figure 1: the dashed rectangle among the figure is represented three step soft switches [0].[13] be the coil of main contact switch.The three steps two ends of soft switch main circuit are respectively power end [10] and load end [11].Three normally open contacts of main contact switch are the 1st main contacts [1], auxilliary contact [2], the 2nd main contacts [3]; Wherein, the input ends of noncontacting switch [7] of soft switch of the three steps anti-short contact switch [6] of short-circuit protection of the 1st main contacts [1] of main contact switch and noncontacting switch [7] of connecting; Insert the coil [4] of an auxilliary main contact switch between the output terminal of noncontacting switch [7] and ground, the main contacts [5] of auxilliary main contact switch is in series with the 2nd main contacts [3] of main contact switch.When three soft switches of step [0] its contact of master's contact switch is in order when electric (promptly main contact switch coil [13]): the 1st main contacts [1]～auxilliary contact [2]～the 2nd main contacts [3] is closed successively, during dead electricity according to backward: the 2nd main contacts [3]～auxilliary contact [2]～the 1st main contacts [1] is opened successively.Wherein the 1st main contacts [1] process is connected with the input end of electronic switch [7] as the anti-short contact switch [6] of the short-circuit protection of electronic switch [7]; The output terminal of electronic switch [7] is connecting the coil [4] of load end [11] and auxilliary main contact switch, auxilliary main contact switch coil [4] hold ground connection in addition; The main contact [5] of auxilliary main contact switch is in series with the 2nd main contact [3]; The main contact [5] of auxilliary main contact switch never cuts off load and therefore seldom is out of order; Auxilliary contact [2] will control power supply and be connected with the control end [12] of electronic switch [7], and control end [12] is also connecting the link in parallel of capacitor [8] and resistance [9] composition, capacitor [8], resistance [9] hold ground connection in addition; Go up the coil [14] of the 2nd signal lamp [16] in parallel and antiseized contact switch at the 2nd main contacts [3], the normally closed contact of the Time Delay Opening of antiseized contact switch [15] is connected in the circuit of main contact switch coil [13]; Antiseized contact switch and the 2nd signal lamp [16] are used for monitoring whether the main contacts [5] of auxilliary main contact switch is normally opened.The coil [17] of the 1st signal lamp [18] in parallel and anti-breaking contact switch on the series connection link of the 1st main contacts [1] and anti-short contact switch [6], normally closed contact of anti-breaking contact switch [19] and main contact switch coil [13] are in series; Anti-breaking contact switch and the 1st signal lamp [18] are used for monitoring whether the three step soft switch preceding electronic switches [7] of starting working are short-circuited.
The connection process of three soft switches of step (referring to Fig. 1) is:
When soft switch of three steps get electric promptly main contact switch coil [13] when electric according to time sequencing: the closed successively signal that is sent of the 1st main contacts [1]～auxilliary contact [2]～the 2nd main contacts [3] and the three step programs finished are:
1. because electronic switch [7] not conducting is not as yet connected so the 1st main contacts [1] can have electric arc ground, power supply [10] is received the input end of electronic switch [7].
2. control end [12] and the capacitor [8] of power connection in electronic switch [7] will be controlled in auxilliary contact [2]; The voltage triggering signal that will increase gradually along with the charging of capacitor [8] is added to control end [12], makes the soft conducting of the no electric arc of electronic switch [7] ground with power end [10] and load end [11] path; Make simultaneously auxilliary main contact switch coil [4] electric, auxilliary main contact switch is connected on often opens main contact [5] closure in the main circuit.
3. because the bypass of the conducting of existence the 1st main contacts [1]～electronic switch [7] and auxilliary main contact switch main contacts [5] are closed, finish soft switch of three steps so the 2nd main contacts [3] can not have the conducting of electric arc ground and do not have the soft conducting in electric arc ground; Simultaneously, owing to the conducting of the 2nd main contacts [3] makes electronic switch [7] be deactivated by the 2nd main contacts [3] short circuit, auxilliary main contact switch main contacts [5] continues closed.
Three steps, the 2nd main contacts [3]～auxilliary contact [2]～the 1st main contacts [1] disconnected successively during soft switch [0] dead electricity, and its three steps program is:
1. owing to there is the bypass of the conducting of the 1st main contacts [1]～electronic switch [7], so the no electric arc of the 2nd main contacts [3] ground disconnection main circuit.
2. auxilliary contact [2] disconnects the control power supply of the control end of electronic switch [7], and capacitor [8] discharges by its parallel resistance [9]; Along with the voltage of capacitor [8] descends gradually, the trigger pip of electronic switch [7] fades away, and makes electronic switch [7] the soft disconnection in no electric arc ground, and auxilliary main contact switch dead electricity is opened its main contacts [5].
3. the no electric arc of the 1st main contacts [1] ground disconnects, and electronic switch [7] and power supply [10] are isolated; Auxilliary its contact of main contact switch dead electricity [5] disconnects, and has finished the soft disconnection of soft switches of three steps and sets back.
Soft switch of three steps is broken down by its inside for prevention and continues to operate the electric arc that is caused and taked following interlock protection:
Electronic switch [7] is if break down, nothing more than following two kinds of situations before three soft switches of step [0] work: electronic switch [7] has opened circuit or short circuit.Open circuit as electronic switch [7], then when three soft switches of step [0] when electric electronic switch [7] fail to connect, it is not closed that auxilliary main contact switch can not get electric its contact [5], so the 2nd main contacts [3]～load end [11] can not conducting, can avoid that the 2nd main contacts [3] is closed by force to produce electric arc and accidents caused.If electronic switch [7] short circuit before three soft switch of step [0] work, then the anti-short contact switch [6] of connecting in electronic switch [7] circuit disconnects when being short-circuited at electronic switch [7], then when three soft switches of step [0] can not continue to carry out preset program when electric and stop at program 1., can avoid also that the 2nd main contacts [3] is closed by force to produce electric arc and accidents caused.If electronic switch [7] short circuit and anti-short contact switch [6] disconnect before three soft switch of step [0] work, then the 1st signal lamp [18] will be lighted and send alerting signal, and the coil of anti-breaking contact switch [17] will get, making it open normally closed contact [19] immediately opens, make main contact switch coil [13] dead electricity can not be closed, closed by force the 1st main contacts [1] when having prevented that electronic switch [7] has been short-circuited fault and produce electric arc.
And when three soft switches of step [0] in the work normally after the closure, electronic switch [7] is deactivated by the 2nd main contacts [3] short circuit after finishing soft operation immediately, electronic switch in this process [7] is isolated from the outside and the no-load current circulation, so electronic switch [7] has no reason also can not be damaged suddenly during this period.Therefore as long as three steps, soft switch was normally connected, it is normally disjunction just, can be when three go on foot soft switch disjunction because of the disjunction generation electric arc initiating failure by force of its electronic switch [7] fault.
For fear of breaking down simultaneously at electronic switch [7] and auxilliary main contact switch: electronic switch [7] fails that soft conducting and auxilliary main contact switch main contacts [5] are stuck when not opening and the 2nd main contacts [3] is connected circuit electric arc can be taken place, go up the coil [14] of the 2nd signal lamp [16] in parallel and antiseized contact switch at the 2nd main contacts [3], the normally closed contact of the Time Delay Opening of antiseized contact switch [15] is connected in the circuit of coil [13] of main contact switch, when three step soft switches [0] if electronic switch [7] and auxilliary main contact switch have broken down open circuit and assist main contact switch main contacts [5] when also not opening as electronic switch [7] simultaneously before connection, antiseized contact switch coil [14] gets electric its Time Delay Opening normally closed contact [15] that makes and opens, make main contact switch coil [13] dead electricity can not be closed, prevented three steps closed by force the 2nd main contacts [3] and produce electric arc during soft switch internal fault;
And when three steps, soft on off state normally set back, auxilliary main contact switch main contacts [5] should be opened, and antiseized contact switch dead electricity contact [15] closure allows main contact switch coil [13] to get the electric connection program that enters; In normal connection program is carried out, program 2. in auxilliary main contact switch get electric back and have the closed and still not closed transient state of the 2nd main contacts [3] of auxilliary main contact switch main contacts [5], antiseized contact switch will be got, but this transient state is very of short duration, the time-delay of opening less than antiseized contact switch normally closed contact [15], and the 2nd main contacts [3] is closed and make antiseized contact switch coil [14] dead electricity before antiseized contact switch normally closed contact [15] Time Delay Opening, closure can only be returned in antiseized contact switch contact [15], has guaranteed the smooth execution of program of soft three step of switch connection circuit in three steps under the normal condition.
Go up the failure alarm signal lamp that the 2nd pilot lamp [16] also in parallel is used as auxilliary main contact switch main contacts [5] at the 2nd main contacts [3].
The make and break process of soft switch of three steps all need be according to the three step program singal complete operations of being determined by the structure institute rigidity of main contact switch.As long as the structure of main contact switch is not destroyed, this program is constant with regard to rigidity.As seen three go on foot the trouble that soft switch had both been exempted artificial programming, constant because of the program rigidity that is in operation again, as long as the structure of main contact switch is not destroyed and just can avoids in service and break down because of program error, and makes the security of operation of soft switch of three steps more secure.
From the introduction of last example as seen, three steps, soft switch only needed five contact switches (wherein main contact switch has three contacts that make-and-break time is different) and a noncontacting switch [7] can constitute by connection in series-parallel, and structure is very simple and do not have electric arc forever; Cancel links such as the microprocessor in the electromechanical integral switch, sensor, saved investment, avoided artificial programming; simplify or exempted protective device, cooling system and the relevant corollary apparatus of electronic switch; reduce failure rate, reduced the consumption of resource, made things convenient for operation maintenance.
(4) description of drawings:
Fig. 1 is for constituting the circuit diagram of soft switch of three steps.Represent with thick lines as [3] and the power end [10] of the 2nd main contacts, the main circuit between the load end [11].
(5) embodiment:
A kind of embodiment of the soft switch of step of three among Fig. 1 is: anti-short contact switch [6] is chosen as fuse; Main contact switch and auxilliary main contact switch are chosen as contactor; Anti-breaking contact switch and antiseized contact switch all are chosen as voltage relay.
If the main contact switch in the soft switch of three steps is chosen as the CJ of 500V 150A
12-150 type three-phase rotary shaft A.C. contactors, and with CJ
12The partial parameters of-150 specification product carries out following adjustment: fill up upward taperliner below a main contact, it is opened apart from the 2nd main contacts of suitably heightening than initial value as soft switch of three steps [3], with taperliner on the anti-pads below another main contact, it is opened apart from suitably turning down as the 1st main contacts [1] than initial value; A contact in its secondary contact box is remained unchanged as the auxilliary contact [2] of soft switch of three steps; Guarantee that three contact closure are that the 1st main contacts [1]～auxilliary contact [2]～the 2nd main contacts [3], disconnection are the 2nd main contacts [3]～auxilliary contact [2]～the 1st main contacts [1] in proper order and check and confirm in proper order
It is (Toshiba) GT60M301 (band backward dioded) that the electronic switch of soft switch of three steps is selected with model, V
CES=1000V, I
C=75A perhaps is 1 of (Hitachi) MBM100GS12AW (2 group), V
CES=1000V, I
C=100A:IGBT should require supporting supply overload, overvoltage protection and heating radiator when buying IGBT.Select 1 of 20V direct supply, with capacitor (100V/0.02 μ F4 only, 0.1 μ F4 only, 0.5 μ F1 only) 9,5 of resistance (10K/0.01W) suitably match or constitute the capacitor [8] and the resistance [9] of soft switch of three steps, three steps other parts of soft switch are suitably matched, then can implement to constitute a kind of 500V75A (Toshiba) of pattern or the single-phase soft switch of three steps of 500V100A (Hitachi) with reference to the key wiring diagram of figure 1, its limit cutout ability depends on the wherein relevant parameter of electronic switch.
In order to simplify the structure of soft switch of three steps, the 2nd main contacts [3] and auxilliary main contact switch main contacts [5] can be designed to one group of relative motion and directly closure can connect two moving contacts of circuit, they are driven respectively by auxilliary main contact switch and two coils of main contact switch [4] and [13].
Because do not produce electric arc, three steps, soft switch can be exempted arc-control device and corollary system thereof, and corresponding contact closure speed, closing force all can suitably reduce.
As long as can match the electronic switch with suitable technique index, soft switch of three steps just can be used for finishing load current to power and distribution supply cable of consumer such as high, medium and low various other motor of relevant voltage level, transformer and various voltage levels and so on to carry out no electric arc such as soft connection, soft disconnection safely and operates.
In the occasion that allows to produce electric arc anything but, for example be applied to have the scene, mine of methane gas explosion danger, three steps in the soft switch to electronic switch send or the auxiliary contact (as auxilliary contact [2]) of interrupt trigger signal can be designed to the mercury cut-off of complete closed, near switch, noncontacting switch, soft-touch control, photoelectric coupling switch, magnetic coupling switch or (pressure, position etc.) sensor.
In the long run, constitute the noncontacting switch replacement that contact switches all in the soft switch of three steps will progressively be had identical technical indicator.But in the real as yet maturation of noncontacting switch technology, before these contact switches are replaced by noncontacting switch, this in soft switch of three steps contact switch and noncontacting switch and deposit and the state that replenishes mutually of learning from other's strong points to offset one's weaknesses continues period of quite growing possibly.
Noncontacting switch in the soft switch of three steps is connected mutually with its fuse of protection, and fuse has the ability of isolating electric arc.
During concrete the application, the protective device in the soft switch of three steps can suitably be simplified as the case may be.
With the index curve trigger signal generator change of capacitor [8] and resistance [9] composition is the trigger signal generator of other forms such as forms such as straight line, stepped line, just can obtain to have the soft switch of three steps of different soft operation processes.
Claims (4)
1. a soft switch of step is characterized in that soft switch of three steps is to be made of by connection in series-parallel contact switch and noncontacting switch; The contact switch of wherein bearing the traffic load electric current, send three step program singals of changing-over circuit and carrying out interlock protection has contactor, isolating switch, relay, fuse, near switch, mercury cut-off, air switch, vacuum switch, drum controller, automatic switch; And bear the noncontacting switch that soft operation is carried out in the switching of load current have by SCR, TRIAC, ASCR, IGBT, IGCT, SGCT, GTO, GTR, MOSFET, SIT, SITH, MCT, MGT constitute single, double to noncontacting switch; The connecting anti-short contact switch [6] of short-circuit protection of the 1st main contacts [1] of main contact switch and noncontacting switch [7] of the input ends of noncontacting switch [7] of soft switch of three steps; Insert the coil [4] of an auxilliary main contact switch between the output terminal of noncontacting switch [7] and ground, the main contacts [5] of auxilliary main contact switch is in series with the 2nd main contacts [3] of main contact switch.
2. soft switch of three steps according to claim 1 is characterized in that the three main contact switches of step in the soft switch have 3 and can open with backward closed and send the 1st main contacts [1] of three step program singals, auxilliary contact [2], the 2nd main contacts [3] in proper order; The coil [17] of the 1st signal lamp [18] in parallel and anti-breaking contact switch on the series connection link of the 1st main contacts [1] and anti-short contact switch [6], normally closed contact of anti-breaking contact switch [19] and main contact switch coil [13] are in series; Go up the coil [14] of the 2nd signal lamp [16] in parallel and antiseized contact switch at the 2nd main contacts [3], the normally closed Time Delay Opening contact [15] of antiseized contact switch and main contact switch coil [13] are in series.
3. soft switch of three steps according to claim 1 is characterized in that the auxilliary contact [2] of main contact switch can be designed to the mercury cut-off of complete closed, near switch, soft-touch control, photoelectric coupling switch or sensor.
4. soft switch of three steps according to claim 1, it is characterized in that: the noncontacting switch that contact switch wherein can be had identical technical indicator replaces.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201089638U CN201741014U (en) | 2009-06-15 | 2009-06-15 | Three-step soft switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201089638U CN201741014U (en) | 2009-06-15 | 2009-06-15 | Three-step soft switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201741014U true CN201741014U (en) | 2011-02-09 |
Family
ID=43556290
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201089638U Expired - Fee Related CN201741014U (en) | 2009-06-15 | 2009-06-15 | Three-step soft switch |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201741014U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934858A (en) * | 2013-12-04 | 2016-09-07 | 伊顿工业(荷兰)有限公司 | Automatic reclosing alternating current circuit breaker |
| CN110311357A (en) * | 2019-06-14 | 2019-10-08 | 国网河南省电力公司灵宝市供电公司 | A kind of Backup Protection Device for Transformer accelerated using nearly bus electric arc |
-
2009
- 2009-06-15 CN CN2009201089638U patent/CN201741014U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105934858A (en) * | 2013-12-04 | 2016-09-07 | 伊顿工业(荷兰)有限公司 | Automatic reclosing alternating current circuit breaker |
| CN105934858B (en) * | 2013-12-04 | 2019-03-29 | 伊顿工业(荷兰)有限公司 | Automatic reclosing AC circuit breaker |
| CN110311357A (en) * | 2019-06-14 | 2019-10-08 | 国网河南省电力公司灵宝市供电公司 | A kind of Backup Protection Device for Transformer accelerated using nearly bus electric arc |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110209 Termination date: 20130615 |