CN102157283A - Control circuit for transfer switch - Google Patents
Control circuit for transfer switch Download PDFInfo
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- CN102157283A CN102157283A CN2011101249681A CN201110124968A CN102157283A CN 102157283 A CN102157283 A CN 102157283A CN 2011101249681 A CN2011101249681 A CN 2011101249681A CN 201110124968 A CN201110124968 A CN 201110124968A CN 102157283 A CN102157283 A CN 102157283A
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Abstract
The invention discloses a control circuit for a transfer switch, and belongs to the technical field of low-voltage apparatus. The control circuit comprises a control power supply, a common closing coil, a common trip coil, a standby closing coil, a standby trip coil, a first control switch, a second control switch, a common auxiliary switch and a standby auxiliary switch, wherein the opening and closing of the common auxiliary switch are linked with a common power switch, the state of which is opposite to that of the common auxiliary switch, and the opening and closing of the standby auxiliary switch are linked with a standby power switch, the state of which is opposite to that of the standby auxiliary switch; the common closing coil is connected in series with the standby auxiliary switch and then connected in parallel with the standby trip coil so as to form a first parallel circuit, and the first parallel circuit is connected in series with the first control switch and then connected with the control power supply so as to form a loop; and the standby closing coil is connected in series with the common auxiliary switch and then connected in parallel with the common trip coil so as to form a second parallel circuit, and the second parallel circuit is connected in series with the second control switch and then connected with the control power supply so as to form another loop. The control circuit for the transfer switch has the advantages of easiness for control, short transfer time and good universality.
Description
Technical field
The present invention relates to a kind of control circuit of change over switch, belong to the low voltage electrical apparatus technology field.
Background technology
Change over switch (TSE) mainly is used in emergency power supply system, is the device for switching from one road power supply changing-over to another road (standby) power supply with load circuit, to guarantee that important load is continuous, reliability service.Therefore TSE is used widely at important electricity consumption place (as airport, hospital, harbour etc.).TSE generally is divided into PC level and CB level, and the PC level is meant and can connects and carry, but is not used in the disjunction short circuit current, and the CB level is equipped with overcurrent trip, and the disjunction short circuit current can be connected and be used for to its main contact.
The above big capacity transfer switching equipment of rated operational current 800A mainly contains two kinds of forms at present, and a kind of is integral type, and a kind of is composite type.Because the integral type transfer switching equipment mostly is that PC level and price are generally than high many of composite type, in addition for the big capacity use occasion more than rated current 800A, CB level transfer switching equipment is used more than the PC level, and therefore two omnipotent breakers of general at present employing add the CB level composite type change over switch that mechanical chain and controller are formed.Circuit shown in Figure 1 is adopted in its control, and this circuit comprises:
Closing coil NH commonly used is used to drive switching-on mechanism commonly used, and mains switch commonly used is closed a floodgate.Its inside comprises and is used for the control coil sensitive switch of conduction time, when mains switch commonly used does not close a floodgate, the sensitive switch closure, it is electric that closing coil commonly used can be got, and carries out closing operation, after mains switch commonly used closes a floodgate successfully, switching-on mechanism commonly used drives sensitive switch, sensitive switch is disconnected, thereby make closing coil outage commonly used, realize control effect of closing a floodgate conduction time commonly used;
Switching winding NF commonly used is used to drive brake separating mechanism commonly used, makes mains switch separating brake commonly used.Its inside comprises and is used for the control coil sensitive switch of conduction time, when mains switch commonly used not during separating brake, the sensitive switch closure, it is electric that switching winding commonly used can be got, and carries out sub-switching operation, after mains switch separating brake success commonly used, brake separating mechanism commonly used drives sensitive switch, sensitive switch is disconnected, thereby make switching winding outage commonly used, realize the effect of conduction time of control separating brake commonly used;
Standby closing coil RH is used to drive standby switching-on mechanism, and Backup Power Switch is closed a floodgate.Its inside comprises and is used for the control coil sensitive switch of conduction time, when Backup Power Switch is not closed a floodgate, the sensitive switch closure, it is electric that standby closing coil can be got, and carries out closing operation, after Backup Power Switch is closed a floodgate successfully, standby switching-on mechanism drives sensitive switch, sensitive switch is disconnected, thereby make standby closing coil outage, realize the effect of conduction time of the standby combined floodgate of control;
Standby switching winding RF is used to drive standby brake separating mechanism, makes the Backup Power Switch separating brake.Its inside comprises and is used for the control coil sensitive switch of conduction time, when Backup Power Switch not during separating brake, the sensitive switch closure, it is electric that standby switching winding can be got, and carries out sub-switching operation, after the success of Backup Power Switch separating brake, standby brake separating mechanism drives sensitive switch, sensitive switch is disconnected, thereby make standby switching winding outage, realize the effect of conduction time of the standby separating brake of control;
The control switch K1-K4 of controller control, control switch K1-K4 respectively with closing coil NH commonly used, switching winding NF, standby closing coil RH commonly used, standby switching winding RF connect and with control power supply and be connected to form the loop.
This control circuit is controlled closing coil NH commonly used, switching winding NF, standby closing coil RH commonly used, standby switching winding RF respectively by controller, when needs are used standby conversion always, controller is closed K2 earlier, connects switching winding NF commonly used, and driving mechanism is used the power supply separating brake always, when controller detects sub-gate signal commonly used, confirm to disconnect K2 behind the separating brake commonly used, closed again K3 connects standby closing coil RH, driving mechanism carries out stand-by power supply and closes a floodgate, and realizes commonly used to standby conversion; When needs carry out standby during to commonly used conversion, controller is closed K4 earlier, connect standby switching winding RF, driving mechanism carries out the stand-by power supply separating brake, when controller detects standby sub-gate signal, confirms to disconnect K4 behind the standby separating brake, closed again K1, connect closing coil NH commonly used, driving mechanism is used power supply always and is closed a floodgate, and realizes commonly used to standby conversion; This control mode needs controller that four groups of control contacts are provided, be unfavorable for the miniaturization of controller, while is reliable for control transformation, controller need confirm just can carry out behind one road power supply separating brake combined floodgate of another road power supply, and the detection of on off state position generally needs 100ms, add coil motion and mechanism action time, whole conversion generally about 300ms, can not be satisfied the requirement of important load less than 100ms.
Summary of the invention
Technical problem to be solved by this invention is to overcome the defective that the prior art control switch is more, change-over time is long, provides a kind of control simple, can realize the control circuit of the change over switch of quick conversion between the two-way power supply.
The present invention is by the following technical solutions:
A kind of control circuit of change over switch comprises the control power supply that is used for to this control circuit power supply, is used for driving respectively
The closing coil commonly used of mains switch combined floodgate commonly used, separating brake, switching winding commonly used, and being used for driving respectively Backup Power Switch combined floodgate, the standby closing coil of separating brake, standby switching winding, described control circuit also comprises first control switch, second control switch, auxiliary switch commonly used, standby auxiliary switch; Described auxiliary switch commonly used close interlock of branch and mains switch commonly used and opposite states, described standby auxiliary switch close branchs and Backup Power Switch links and opposite states; Closing coil commonly used and standby auxiliary switch series connection back are in parallel with standby switching winding, form first parallel circuits, are connected to form the loop with the control power supply after first parallel circuits is connected with first control switch; Standby closing coil and auxiliary switch commonly used series connection back are in parallel with switching winding commonly used, form second parallel circuits, are connected to form the loop with the control power supply after second parallel circuits is connected with second control switch.
Control circuit control mode of the present invention is simple, and only two control signals of need just can realize the mutual conversion between the two-way power supply, help the realization of controller miniaturization.By connecting the closing coil of another road power supply in this power supply separating brake back that puts in place with the auxiliary switch of one road mains switch interlock, can realize the quick conversion between the two-way power supply, satisfy important load to the requirement of change-over time less than 100ms.And versatility of the present invention is good, both can be used for the composite type transfer switching equipment be made up of two circuit breakers, also can be used for omnipotent breaker type integral type transfer switching equipment.
Description of drawings
Fig. 1 is the control circuit schematic diagram of existing change over switch;
Fig. 2 is the control circuit schematic diagram of change over switch of the present invention;
Fig. 3 is the equivalent electric circuit of control circuit of the present invention;
Fig. 4 is the principle schematic of auxiliary switch and mains switch commonly used interlock;
Fig. 5 is a kind of structure of auxiliary switch and mains switch commonly used interlock;
Fig. 6 is the view during closed K2 in the stand-by power supply process for power source conversion commonly used;
Fig. 7 is the view during the Q2 separating brake in the stand-by power supply process for power source conversion commonly used;
View when Fig. 8 finishes for the stand-by power supply process for power source conversion commonly used;
Fig. 9 is the view during closed K1 in stand-by power supply the is converted to power supply process commonly used;
Figure 10 is the view during the Q1 separating brake in stand-by power supply the is converted to power supply process commonly used;
View when Figure 11 uses the end of power supply process always for stand-by power supply is converted to.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Control circuit of the present invention as shown in Figure 2, comprise the control power supply (P1, P2 represent to control the two poles of the earth of power supply) that is used for to this control circuit power supply, be used for driving respectively the closing coil NH commonly used of power supply commonly used (representing) switch Q1 combined floodgate, separating brake, switching winding NF commonly used with N, and being used for driving respectively stand-by power supply (representing) switch Q2 combined floodgate, the standby closing coil RH of separating brake, standby switching winding RF with R, described control circuit also comprises the first control switch K1, the second control switch K2, auxiliary switch NAX, standby auxiliary switch RAX commonly used; Described auxiliary switch NAX commonly used closes branch and mains switch Q1 commonly used interlock and opposite states, described standby auxiliary switch RAX close branchs and Backup Power Switch Q2 links and opposite states; Closing coil NH commonly used and standby auxiliary switch RAX series connection back are in parallel with standby switching winding RF, form first parallel circuits, are connected to form the loop with the control power supply after first parallel circuits is connected with the first control switch K1; Standby closing coil RH and auxiliary switch NAX commonly used series connection back are in parallel with switching winding NF commonly used, form second parallel circuits, are connected to form the loop with the control power supply after second parallel circuits is connected with the second control switch K2.The equivalent electric circuit of this control circuit as shown in Figure 3.
In this control circuit, structure and the principle of described closing coil NH commonly used, switching winding NF commonly used, standby closing coil RH, standby switching winding RF are same as the prior art, repeat no more herein.
The first control switch K1 is used to connect the power supply of standby switching winding and closing coil commonly used, and the control transformation switch is transformed into position of source commonly used from the stand-by power supply position; The second control switch K2 is used to connect the power supply of using switching winding NF and standby closing coil RH always, and the control transformation switch is transformed into the stand-by power supply position from position of source commonly used.
Use auxiliary switch NAX always, be used to connect the power supply of standby closing coil RH, it closes branch and mains switch Q1 commonly used interlock and opposite states, promptly when mains switch Q1 commonly used is in "on" position, it is in open position, and when mains switch Q1 separating brake commonly used, it is in the close position.
Standby auxiliary switch RAX is used to connect the power supply of using closing coil always, and it closes branch and Backup Power Switch Q2 interlock and opposite states, promptly when Backup Power Switch Q2 is in "on" position, it is in open position, and when Backup Power Switch Q2 separating brake, it is in the close position.
Make auxiliary switch and mains switch linkage manner a lot, for example can adopt mechanical chain, the modes such as lock, electricity+mechanical chain that are electrically connected, owing to have advantage simple in structure, safe and reliable, with low cost, so preferred mechanical linkage mode of the present invention.Fig. 4 adopts the mechanical chain mode to realize using always/principle schematic of standby auxiliary switch and commonly used/Backup Power Switch interlock.Fig. 5 has shown a kind of concrete structure of mechanical chain, and as shown in the figure, auxiliary switch 1 is a sensitive switch, is installed on the mains switch body, is connected with the driving shaft of mains switch with spring 3 by activity template 2 successively.When mains switch driving shaft A to when rotation, mains switch separating brake, driving shaft retracting spring 3, the effect that activity template 2 is removed the sensitive switch push rod discharges push rod, the conversion of sensitive switch contact, be that former cut-off point closure, closing point disconnect, realize the interlock of auxiliary switch and mains switch.When mains switch driving shaft B to when rotation, mains switch closes a floodgate, driving shaft back-moving spring 3, activity template 2 promotes the push rod of sensitive switch under the effect of spring, make the conversion of sensitive switch contact, promptly former closing point disconnects, the cut-off point closure, realizes the interlock of auxiliary switch and mains switch.
When using the switching between control circuit control of the present invention power supply commonly used and the stand-by power supply, its control procedure is as follows:
Power source conversion commonly used is to stand-by power supply:
As shown in Figure 5, the mains switch Q1 commonly used of automatic change-over is in closing position, Q2 is in the separating brake position, auxiliary switch NAX commonly used is in open position, controller sends control signal, the closed second control switch K2, switching winding NF commonly used at this moment gets electric, drives mains switch Q1 separating brake commonly used;
As shown in Figure 6, after mains switch Q1 separating brake success commonly used, auxiliary switch NAX commonly used connects standby closing coil RH by becoming close point battle, drives Backup Power Switch Q2 and closes a floodgate;
As shown in Figure 7, after Backup Power Switch Q2 closed a floodgate, controller disconnected the second control switch K2, finishes conversion and control.
Stand-by power supply is converted to power supply commonly used:
As shown in Figure 8, the mains switch Q1 commonly used of automatic change-over is in the separating brake position, and Q2 is in closing position, standby auxiliary switch RAX is in open position, and controller sends control signal, closed control switch K1, this moment, standby switching winding RF commonly used got electricly, drove Backup Power Switch Q2 separating brake;
As shown in Figure 9, standby auxiliary switch RAX connects closing coil NH commonly used by becoming close point battle after the success of Backup Power Switch Q2 separating brake, drives mains switch Q1 commonly used and closes a floodgate;
As shown in figure 10, after mains switch Q1 commonly used closed a floodgate, controller disconnected the first control switch K1, finishes conversion and control.
Change over switch control circuit of the present invention only need provide the control signal of two control switchs can finish the conversion of using always between power supply and the stand-by power supply, helps the miniaturization of controller.And can significantly shorten the required time of power source conversion process, can satisfy of the requirement of important load power source conversion time less than 100ms.
Claims (3)
1. the control circuit of a change over switch, comprise the control power supply that is used for to this control circuit power supply, be used for driving respectively the closing coil commonly used of mains switch combined floodgate commonly used, separating brake, switching winding commonly used, and be used for driving respectively Backup Power Switch combined floodgate, the standby closing coil of separating brake, standby switching winding, it is characterized in that described control circuit also comprises first control switch, second control switch, auxiliary switch commonly used, standby auxiliary switch; Described auxiliary switch commonly used close interlock of branch and mains switch commonly used and opposite states, described standby auxiliary switch close branchs and Backup Power Switch links and opposite states; Closing coil commonly used and standby auxiliary switch series connection back are in parallel with standby switching winding, form first parallel circuits, are connected to form the loop with the control power supply after first parallel circuits is connected with first control switch; Standby closing coil and auxiliary switch commonly used series connection back are in parallel with switching winding commonly used, form second parallel circuits, are connected to form the loop with the control power supply after second parallel circuits is connected with second control switch.
2. the control circuit of change over switch according to claim 1 is characterized in that, described auxiliary switch commonly used close branch and mains switch commonly used interlock, standby auxiliary switch close branchs and Backup Power Switch links, all the mode by mechanical chain realizes.
3. as the control circuit of change over switch as described in the claim 2, it is characterized in that, described auxiliary switch commonly used is the sensitive switch that is installed on the described mains switch body commonly used, and the push rod of sensitive switch is connected with the driving shaft of mains switch commonly used by an activity template and a spring successively; Described standby auxiliary switch is the sensitive switch that is installed on the described Backup Power Switch body, and the push rod of sensitive switch is connected with the driving shaft of Backup Power Switch by an activity template and a spring successively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101249681A CN102157283A (en) | 2011-05-16 | 2011-05-16 | Control circuit for transfer switch |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101249681A CN102157283A (en) | 2011-05-16 | 2011-05-16 | Control circuit for transfer switch |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102157283A true CN102157283A (en) | 2011-08-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101249681A Pending CN102157283A (en) | 2011-05-16 | 2011-05-16 | Control circuit for transfer switch |
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| Country | Link |
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| CN (1) | CN102157283A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102497004A (en) * | 2011-11-25 | 2012-06-13 | 常熟开关制造有限公司(原常熟开关厂） | Automatic change-over switch control method |
| CN103036304A (en) * | 2011-09-30 | 2013-04-10 | 首瑞（北京）投资管理集团有限公司 | Alternating current power supply system for substation |
| CN106130165A (en) * | 2016-07-01 | 2016-11-16 | 无锡韩光电器股份有限公司 | The control circuit of automatic transfer switching electric appliance |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297640B1 (en) * | 1999-04-12 | 2001-10-02 | Asco Power Technologies, L.P. | Transfer switch position sensing using coil control contacts |
| CN1366321A (en) * | 2001-01-11 | 2002-08-28 | 伊顿公司 | Trip indicator of breaker |
| CN2676481Y (en) * | 2004-01-17 | 2005-02-02 | 王炎 | Automatic delivering device for standby power supply |
| CN202067694U (en) * | 2011-05-16 | 2011-12-07 | 常熟开关制造有限公司(原常熟开关厂） | Control circuit of change-over switch |
-
2011
- 2011-05-16 CN CN2011101249681A patent/CN102157283A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6297640B1 (en) * | 1999-04-12 | 2001-10-02 | Asco Power Technologies, L.P. | Transfer switch position sensing using coil control contacts |
| CN1366321A (en) * | 2001-01-11 | 2002-08-28 | 伊顿公司 | Trip indicator of breaker |
| CN2676481Y (en) * | 2004-01-17 | 2005-02-02 | 王炎 | Automatic delivering device for standby power supply |
| CN202067694U (en) * | 2011-05-16 | 2011-12-07 | 常熟开关制造有限公司(原常熟开关厂） | Control circuit of change-over switch |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103036304A (en) * | 2011-09-30 | 2013-04-10 | 首瑞（北京）投资管理集团有限公司 | Alternating current power supply system for substation |
| CN103036304B (en) * | 2011-09-30 | 2015-05-20 | 首瑞（北京）投资管理集团有限公司 | Alternating current power supply system for substation |
| CN102497004A (en) * | 2011-11-25 | 2012-06-13 | 常熟开关制造有限公司(原常熟开关厂） | Automatic change-over switch control method |
| CN102497004B (en) * | 2011-11-25 | 2014-05-07 | 常熟开关制造有限公司(原常熟开关厂） | Automatic change-over switch control method |
| CN106130165A (en) * | 2016-07-01 | 2016-11-16 | 无锡韩光电器股份有限公司 | The control circuit of automatic transfer switching electric appliance |
| CN106130165B (en) * | 2016-07-01 | 2018-10-23 | 无锡韩光电器股份有限公司 | The control circuit of automatic transfer switching electric appliance |
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Application publication date: 20110817 |