CN111785548B - Electrical interlocking of dual-power automatic transfer switch and dual-power automatic transfer switch - Google Patents
Electrical interlocking of dual-power automatic transfer switch and dual-power automatic transfer switch Download PDFInfo
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- CN111785548B CN111785548B CN201910270428.0A CN201910270428A CN111785548B CN 111785548 B CN111785548 B CN 111785548B CN 201910270428 A CN201910270428 A CN 201910270428A CN 111785548 B CN111785548 B CN 111785548B
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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
- H01H9/20—Interlocking, locking, or latching mechanisms
- H01H9/26—Interlocking, locking, or latching mechanisms for interlocking two or more switches
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
- H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
- H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
Abstract
An electrical interlock for a dual power automatic transfer switch, wherein the electrical interlock comprises: a first microswitch and a second microswitch; the switch state of the first microswitch is synchronous with the switch state of a first contact assembly of a first power supply of the dual-power automatic transfer switch in a mechanical linkage mode; the switch state of the second microswitch is synchronous with the switch state of a second contact assembly of a second power supply of the dual-power-supply automatic transfer switch in a mechanical linkage mode; a controller that changes the switching state of the first contact assembly and the second contact assembly by driving the contact driving mechanism through an electromagnetic mechanism or a bidirectional rotating motor; wherein the controller is capable of controlling only one or both of the first and second contact assemblies to be in a closed state by obtaining their switch states from the first and second micro-switches. A dual power automatic transfer switch comprising an electrical interlock as described above.
Description
Technical Field
The present disclosure relates to an electrical interlock for a dual power Automatic Transfer Switch (ATS). The electrical interlock function of the ATS means that the two power sources connected thereto cannot be shorted due to the two power sources being simultaneously turned on by the load side of the ATS. The present disclosure also relates to a dual power automatic transfer switch including the electrical interlock.
Background
ATS product standards specify that mechanical interlocks are necessary and reliable. An electrical interlock is also required as a complement to a mechanical interlock. The electrical interlock may allow the ATS to have greater safety, i.e., not cause a short circuit between the two power sources.
Fig. 1 shows an example of a prior art electrical interlock: the micro switch LSN1 is a common power supply mechanism (a first power supply) which is switched on 1-4 when not in a closed position and is switched on 1-2 when in the closed position; the micro switch LSR1 is a standby power supply mechanism (a second power supply) which is switched on 1-4 when not in a closed position and is switched on 1-2 when in the closed position; the micro switch OFN2 is switched on when a common power supply is switched off and is switched off when the common power supply is switched on; the microswitch OFN2 is switched on when a common power supply is switched off and switched off when the common power supply is switched on; the microswitch OFR2 is turned on when the standby power supply is turned off, and turned off when it is turned on. LS-OFF is only the mechanism that is OFF in the OFF position and on in the other positions. The five microswitches and the circuit diagram form an electric interlock together, namely: when the controller controls the common power supply to be turned on (N contact is closed), the driver M closes the common power supply of the ATS by current driving from the power supply terminal through NA2 → LSN1 (1-4) → M → OFR2 → OFN2 → A1. At this time, the control circuit is: the LSN1 contact is switched on 1-2 and switched off 1-4; the OFN2 contact is disconnected; the OFR2 contact is still connected; LS-OFF is turned on. The main circuit is as follows: the power supply is combined.
Now the electrical interlock function is verified, with the R contact closed: when the controller controls the standby power supply to be turned on (the R contact is closed), the driver M turns OFF the common power supply of the ATS by current driving from the power supply terminal through RA2 → LSR1 (1-4) → M → LS-OFF → A1. When the ATS mechanism reaches the OFF position, the normal power supply is not disconnected due to welding or the like, and the control circuit stops the power supply to the driver M because the OFN2 is still disconnected and LS-OFF is also turned OFF. Therefore, the ATS mechanism stays at the OFF position, the ATS main circuit stays at the on state of the common power supply, and the standby power supply is still in the OFF state, so that the electric interlocking for preventing the common power supply and the standby power supply from being simultaneously switched on is realized.
The defects of the prior art are as follows: the quantity of the micro switches in the control circuit is large, so that the product cost is high and the reliability is poor.
Disclosure of Invention
In view of the above problems and deficiencies of existing solutions, the present disclosure proposes an electrical interlock for a dual power automatic transfer switch, wherein the electrical interlock comprises: a first microswitch and a second microswitch; the switch state of the first microswitch is synchronous with the switch state of a first contact assembly of a first power supply of the dual-power-supply automatic transfer switch in a mechanical linkage mode; the switch state of the second microswitch is synchronous with the switch state of a second contact assembly of a second power supply of the dual-power-supply automatic transfer switch in a mechanical linkage mode; a controller that changes the switching state of the first and second contact assemblies by driving a contact driving mechanism through an electromagnetic mechanism or a bidirectional rotary motor; wherein the controller is capable of controlling only one or both of the first and second contact assemblies to be in a closed state by obtaining their switch states from the first and second microswitches.
According to one aspect of the present disclosure, the electromagnetic mechanism includes a first electromagnet and a second electromagnet; the first electromagnet and the second electromagnet are respectively used for driving the contact driving mechanism.
According to the above aspects of the present disclosure, synchronizing by way of mechanical linkage represents: when the first contact assembly is in a closed state, the first microswitch is also in a closed state; when the first contact assembly is in an open state, the first microswitch is also in an open state; when the second contact assembly is in a closed state, the second microswitch is also in a closed state; when the second contact assembly is in an open state, the second microswitch is also in an open state.
According to the above aspects of the present disclosure, the first contact assembly includes a first movable contact and a first stationary contact; the second contact assembly comprises a second moving contact and a second fixed contact; the switch state of the first microswitch is synchronous with the first moving contact in a mechanical linkage mode; the switch state of the second microswitch is synchronous with the second moving contact in a mechanical linkage mode.
According to the above aspects of the disclosure, when the first power supply is in a closed state (a closing state), the first movable contact and the first fixed contact are in a closed contact state, the first microswitch is in a closed state, the second power supply is in an open state (a breaking state), the second microswitch is in an open state, and the second movable contact and the second fixed contact are in an open state.
After the controller actuates the first electromagnet for the first time, the first electromagnet drives the contact driving mechanism to enable the first moving contact and the first static contact to be changed from a closed contact state to an open state, the first microswitch is also changed from the closed state to the open state due to mechanical linkage, the first power supply is changed to the open state (a brake-separating state), and the second power supply is kept in the open state (a brake-separating state).
After the first moving contact and the first fixed contact are separated, the controller actuates the first electromagnet again, the first electromagnet drives the contact driving mechanism to enable the second moving contact and the second fixed contact to be changed from an open state to a closed state, the second microswitch is changed to be in the closed state, the second power supply is changed to be in the closed state (a switching-on state), and the first power supply is kept in the open state (a switching-off state).
According to the above aspects of the disclosure, if the first moving contact and the first fixed contact are not separated after the controller actuates the first electromagnet for the first time, the first microswitch is still in a closed state, and the first power supply is still in a closed state, the controller does not actuate the first electromagnet any more, and further the first electromagnet does not drive the contact driving mechanism, and the second moving contact and the second fixed contact are still in an open state, and the second power supply is still in an open state.
According to the above aspects of the disclosure, when the second power supply is in a closed state, the second movable contact and the second fixed contact are in a closed contact state, the second microswitch is in a closed state, the first power supply is in an open state, the first microswitch is in an open state, and the first movable contact and the second fixed contact are in an open state.
After the controller actuates the second electromagnet for the first time, the second electromagnet drives the contact driving mechanism to enable the second moving contact and the second static contact to be changed from a closed contact state to an open state, the second microswitch is mechanically linked to be changed from the closed state to the open state, the second power supply is changed to be in the open state, and the first power supply is kept in the open state.
After the second moving contact and the second fixed contact are separated, the controller actuates the second electromagnet again, the second electromagnet drives the contact driving mechanism to enable the first moving contact and the first fixed contact to be changed from an open state to a closed state, the first microswitch is changed to be in the closed state, the first power supply is changed to be in the closed state, and the second power supply is kept in the open state.
According to the above aspects of the present disclosure, if the second moving contact and the second fixed contact are not separated after the controller actuates the second electromagnet for the first time, the second micro switch is still in the closed state, and the second power supply is still in the closed state, the controller does not actuate the second electromagnet any more, and further the second electromagnet does not drive the contact driving mechanism, and the first moving contact and the first fixed contact are still in the open state, and the first power supply is still in the open state.
In accordance with another aspect of the present disclosure, a dual power automatic transfer switch is provided, wherein the dual power automatic transfer switch includes an electrical interlock as described above.
The advantages of the present disclosure are:
1. only two microswitches are used, while the original technical scheme needs five microswitches, and the reduction of the number reduces the risk of the malfunction of the microswitches.
2. The interlocking reliability is high: when the dual-power automatic transfer switch is in a first power supply (a common power supply), the operation of a driver controlled by the controller can only be to firstly 'open' the dual-power automatic transfer switch, then check a microswitch signal connected with the dual-power automatic transfer switch, and execute 'closing' operation of a second power supply (a standby power supply) after confirming the 'opening' of the microswitch signal. If the dual-power automatic transfer switch still stays on the first power supply during the opening operation of the driver due to fusion welding of contacts of the dual-power automatic transfer switch and the like, the driver of the dual-power automatic transfer switch controlled by the controller does not execute subsequent operation, and the reliability of electric interlocking is ensured. The electrical interlock during the switch from the second power source to the first power source is similarly reliable.
So that the manner in which the disclosure is made in detail herein can be better understood, and in which the contributions to the art may be better appreciated, the disclosure has been summarized rather broadly. There are, of course, embodiments of the disclosure that will be described below and which will form the subject matter of the claims appended hereto.
As such, those skilled in the art will appreciate that the conception upon which this disclosure is based may readily be utilized as a basis for the designing of other structures, methods and systems for carrying out the several purposes of the present disclosure. It is important, therefore, that the appended claims be regarded as including such equivalent constructions insofar as they do not depart from the spirit and scope of the present disclosure.
Drawings
The present disclosure will be better understood and its advantages will become more apparent to those skilled in the art from the following drawings. The drawings described herein are for illustrative purposes only of selected embodiments and not all possible implementations and are not intended to limit the scope of the present disclosure.
FIG. 1 shows an example of a prior art electrical interlock;
fig. 2 shows an example of an electrical interlock according to the present disclosure.
Detailed Description
An embodiment according to the present disclosure is described in detail below with reference to fig. 2.
According to one embodiment of the present disclosure, an electrical interlock for a dual power automatic transfer switch is presented, wherein the electrical interlock comprises: a first microswitch 1 and a second microswitch 2; the switch state of the first microswitch 1 and the switch state of the first contact assembly 3 of the first power supply 8 of the dual-power automatic transfer switch are synchronized in a mechanical linkage mode; the switch state of the second microswitch 2 is synchronous with the switch state of the second contact assembly 4 of the second power supply 9 of the dual-power automatic transfer switch in a mechanical linkage mode; a controller 5, wherein the controller 5 drives a contact driving mechanism 7 through an electromagnetic mechanism 6 or a bidirectional rotating motor (not shown) to change the switching state of the first contact assembly 3 and the second contact assembly 4; wherein the controller 5 is capable of controlling only one or both of the first and second contact assemblies 3, 4 to be in a closed state by obtaining their switching states from the first and second micro switches 1, 2.
According to the above-described embodiment of the present disclosure, the electromagnetic mechanism 6 includes the first electromagnet 6-1 and the second electromagnet 6-2; the first electromagnet 6-1 and the second electromagnet 6-2 are respectively used for driving the contact driving mechanism 7.
According to the above embodiments of the present disclosure, the synchronization by means of mechanical linkage represents: when the first contact assembly 3 is in a closed state, the first microswitch 1 is also in a closed state; when the first contact assembly 3 is in an open state, the first microswitch 1 is also in an open state; when the second contact assembly 4 is in a closed state, the second microswitch 2 is also in a closed state; when the second contact assembly 4 is in the open state, the second microswitch 2 is also in the open state.
According to the above-mentioned embodiment of the present disclosure, the first contact assembly 3 includes a first moving contact 3-1 and a first stationary contact 3-2; the second contact assembly 4 comprises a second moving contact 4-1 and a second fixed contact 4-2.
The switch state of the first microswitch 1 is synchronous with the first moving contact 3-1 in a mechanical linkage way; the switch state of the second microswitch 2 is synchronous with the second moving contact 4-1 through a mechanical linkage mode.
The process of switching the first power supply 8 to be in the closed state and the second power supply 9 to be in the open state to the first power supply 8 to be in the open state and the second power supply 9 to be in the open state (i.e. the double split state) to the first power supply 8 to be in the open state and the second power supply 9 to be in the closed state is described in detail below.
According to the above embodiment of the present disclosure, when the first power supply 8 is in a closed state (a closed state), the first movable contact 3-1 and the first fixed contact 3-2 are in a closed contact state, the first micro switch 1 is in a closed state, at this time, the second power supply 9 is in an open state (an open state), the second movable contact 4-1 and the second fixed contact 4-2 are in an open state, and the second micro switch 2 is in an open state.
After the controller 5 actuates the first electromagnet 6-1 for the first time, the first electromagnet 6-1 drives the contact driving mechanism 7 to change the first moving contact 3-1 and the first fixed contact 3-2 from the closed contact state to the open state, and due to mechanical linkage, the first microswitch 1 is also changed from the closed state to the open state, the first power supply 8 is changed to the open state (the open state), and the second power supply 9 is kept in the open state (the open state).
After the first moving contact 3-1 and the first fixed contact 3-2 are separated, the controller 7 actuates the first electromagnet 6-1 again, the first electromagnet 6-1 drives the contact driving mechanism 7 to change the second moving contact 4-1 and the second fixed contact 4-2 from the open state to the closed state, and the second microswitch 2 is mechanically linked to change the open state to the closed state, so that the second power supply 9 is changed to the closed state (switching-on state), and the first power supply 8 is kept in the open state (switching-off state).
According to the above embodiment of the present disclosure, if the first movable contact 3-1 and the first fixed contact 3-2 are not separated (for example, fusion welding occurs) after the controller 5 activates the first electromagnet 6-1 for the first time, and the first power supply 8 is still in the closed state (closing state) because the first microswitch 1 is still in the closed state through mechanical linkage, the controller 5 does not issue any more instruction to activate the first electromagnet 6-1, and thus the first electromagnet 6-1 cannot drive the contact driving mechanism 7, the second movable contact 4-1 and the second fixed contact 4-2 are still in the open state, and the second power supply 9 is still in the open state (opening state). In this embodiment, the electrical interlock according to the present disclosure ensures that the first and second power sources 8, 9 are not in an on state at the same time (i.e., only one or both of the first and second contact assemblies 3, 4 are in a closed state), thereby avoiding a short circuit between the two power sources.
The process of switching the first power supply 8 to be in the open state and the second power supply 9 to be in the closed state to switch the first power supply 8 to be in the open state and the second power supply 9 to be in the open state (i.e. the double split state) to switch the first power supply 8 to be in the closed state and the second power supply 9 to be in the open state is described in detail below.
According to the above embodiment of the present disclosure, when the second power supply 9 is in a closed state (a closed state), the second movable contact 4-1 and the second fixed contact 4-2 are in a closed contact state, the second micro switch 2 is in a closed state, the first power supply 8 is in an open state (an open state), the first movable contact 3-1 and the first fixed contact 3-2 are in an open state, and the first micro switch 1 is in an open state.
After the controller 5 actuates the second electromagnet 6-2 for the first time, the second electromagnet 6-2 drives the contact driving mechanism 7 to change the second moving contact 4-1 and the second fixed contact 4-2 from the closed contact state to the open state, and due to mechanical linkage, the second microswitch 2 also changes from the closed state to the open state, the second power supply 9 changes to the open state (the open state), and the first power supply 8 keeps in the open state (the open state).
After the second moving contact 4-1 and the second fixed contact 4-2 are separated, the controller 5 actuates the second electromagnet 6-2 again, the second electromagnet 6-2 drives the contact driving mechanism 7 to make the first moving contact 3-1 and the first fixed contact 3-2 change from the open state to the closed state, the first microswitch 1 changes to the closed state, the first power supply 8 changes to the closed state (closing state), and the second power supply 9 keeps the open state (opening state).
According to the above embodiment of the present disclosure, if the second movable contact 4-1 and the second fixed contact 4-2 are not separated (e.g., fusion welding occurs) after the controller 5 actuates the second electromagnet 6-2 for the first time, and the second power supply 9 is still in the closed state (closing state) because the second microswitch 2 is still in the closed state due to mechanical linkage, the controller 5 does not send any more instruction to actuate the second electromagnet 6-2, and further the second electromagnet 6-2 does not drive the contact driving mechanism 7, the first movable contact 3-1 and the first fixed contact 3-2 are still in the open state, and the first power supply 8 is still in the open state (opening state)
In this embodiment, the electrical interlock according to the present disclosure ensures that the first and second power sources 8, 9 are not in an on state at the same time (i.e., only one or both of the first and second contact assemblies 3, 4 are in a closed state), thereby avoiding a short circuit between the two power sources.
In accordance with another embodiment of the present disclosure, a dual power automatic transfer switch is provided, wherein the dual power automatic transfer switch includes an electrical interlock as described above.
While the disclosure has been described in the specification and drawings with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted for elements thereof without departing from the scope of the disclosure as defined in the claims. Moreover, the combination and arrangement of features, elements and/or functions between specific embodiments herein is clearly apparent and thus, in light of this disclosure, one skilled in the art will appreciate that features, elements and/or functions of an embodiment may be incorporated into another specific embodiment as appropriate, unless described otherwise, above. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the disclosure without departing from the essential scope thereof. Therefore, it is intended that the disclosure not be limited to the particular embodiment illustrated by the drawings and described in the specification as the best mode presently contemplated for carrying out this disclosure, but that the disclosure will include all embodiments falling within the scope of the foregoing description and the appended claims.
Claims (8)
1. An electrical interlock for a dual power automatic transfer switch, wherein the electrical interlock comprises:
a first microswitch and a second microswitch;
the switch state of the first microswitch is synchronous with the switch state of a first contact assembly of a first power supply of the dual-power-supply automatic transfer switch in a mechanical linkage mode;
the switch state of the second microswitch is synchronous with the switch state of a second contact assembly of a second power supply of the dual-power-supply automatic transfer switch in a mechanical linkage mode;
a controller that changes the switching state of the first and second contact assemblies by driving a contact driving mechanism through an electromagnetic mechanism or a bidirectional rotary motor;
wherein the controller is capable of controlling only one or both of the first and second contact assemblies to be in a closed state by obtaining their switch states from the first and second microswitches;
the electromagnetic mechanism comprises a first electromagnet and a second electromagnet;
the first electromagnet and the second electromagnet are respectively used for driving the contact driving mechanism;
in the process of changing from the first power supply in a closed state and the second power supply in an open state to the first power supply in an open state and the second power supply in a closed state, the controller drives the first electromagnet twice before and after, and the first electromagnet drives the contact driving mechanism twice before and after;
in the process of changing from the first power supply in the open state and the second power supply in the closed state to the first power supply in the closed state and the second power supply in the open state, the controller drives the second electromagnet twice before and after, and the second electromagnet drives the contact driving mechanism twice before and after.
2. The electrical interlock of claim 1 wherein
The synchronization represents:
when the first contact assembly is in a closed state, the first microswitch is also in a closed state;
when the first contact assembly is in an open state, the first microswitch is also in an open state;
when the second contact assembly is in a closed state, the second microswitch is also in a closed state;
when the second contact assembly is in an open state, the second microswitch is also in an open state.
3. The electrical interlock of claim 1 wherein
The first contact assembly comprises a first moving contact and a first fixed contact;
the second contact assembly comprises a second moving contact and a second fixed contact;
the switch state of the first microswitch is synchronous with the first moving contact in a mechanical linkage mode;
the switch state of the second microswitch is synchronous with the second moving contact in a mechanical linkage mode.
4. The electrical interlock of claim 3 wherein
When the first power supply is in a closed state, the first moving contact and the first fixed contact are in a closed contact state, the first microswitch is in a closed state, the second power supply is in an open state, the second microswitch is in an open state, and the second moving contact and the second fixed contact are in an open state;
after the controller actuates the first electromagnet for the first time, the first electromagnet drives the contact driving mechanism to enable the first moving contact and the first static contact to be changed from a closed contact state to an open state, the first microswitch is also changed from the closed state to the open state due to mechanical linkage, the first power supply is changed to the open state, and the second power supply is kept in the open state;
after the first moving contact and the first fixed contact are separated, the controller actuates the first electromagnet again, the first electromagnet drives the contact driving mechanism to enable the second moving contact and the second fixed contact to be changed from an open state to a closed state, the second microswitch is changed to a closed state, the second power supply is changed to a closed state, and the first power supply is kept in the open state.
5. The electrical interlock of claim 4 wherein
If the first moving contact and the first fixed contact are not separated after the controller actuates the first electromagnet for the first time, the first microswitch is still in a closed state, the first power supply is still in a closed state, the controller does not actuate the first electromagnet any more, the first electromagnet cannot drive the contact driving mechanism, the second moving contact and the second fixed contact are still in an open state, and the second power supply is still in an open state.
6. The electrical interlock of claim 3 wherein
When the second power supply is in a closed state, the second moving contact and the second fixed contact are in a closed contact state, the second microswitch is in a closed state, the first power supply is in an open state, the first microswitch is in an open state, and the first moving contact and the second fixed contact are in an open state;
after the controller actuates the second electromagnet for the first time, the second electromagnet drives the contact driving mechanism to enable the second moving contact and the second static contact to be changed from a closed contact state to an open state, the second microswitch is also changed from the closed state to the open state due to mechanical linkage, the second power supply is changed to the open state, and the first power supply is kept in the open state;
after the second moving contact and the second fixed contact are separated, the controller actuates the second electromagnet again, the second electromagnet drives the contact driving mechanism to enable the first moving contact and the first fixed contact to be changed from an open state to a closed state, the first microswitch is changed to be in the closed state, the first power supply is changed to be in the closed state, and the second power supply is kept in the open state.
7. The electrical interlock of claim 6 wherein
If the second moving contact and the second fixed contact are not separated after the controller actuates the second electromagnet for the first time, the second microswitch is still in a closed state, and the second power supply is still in a closed state, the controller does not actuate the second electromagnet any more, so that the second electromagnet does not drive the contact driving mechanism, the first moving contact and the first fixed contact are still in an open state, and the first power supply is still in an open state.
8. A dual power automatic transfer switch, wherein the dual power automatic transfer switch comprises the electrical interlock of any one of claims 1-7 above.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910270428.0A CN111785548B (en) | 2019-04-04 | 2019-04-04 | Electrical interlocking of dual-power automatic transfer switch and dual-power automatic transfer switch |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910270428.0A CN111785548B (en) | 2019-04-04 | 2019-04-04 | Electrical interlocking of dual-power automatic transfer switch and dual-power automatic transfer switch |
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| CN111785548B true CN111785548B (en) | 2023-03-24 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN206225224U (en) * | 2016-09-18 | 2017-06-06 | 施耐德电气工业公司 | Dual-power transfer switch and the mechanism for it |
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| GB1379895A (en) * | 1970-12-22 | 1975-01-08 | Drayton Controls Ltd | Electric switch controls |
| CN101093753A (en) * | 2006-06-19 | 2007-12-26 | 上海精益电器厂有限公司 | Interlocking mechanism of automatic changeover switch |
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| CN201796766U (en) * | 2009-12-17 | 2011-04-13 | 上海行创电气有限公司 | Electrical interlocking control device for transfer switching equipment |
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| CN208142055U (en) * | 2018-05-04 | 2018-11-23 | 施耐德电器工业公司 | The position indicator and dual-power transfer switch of dual-power transfer switch |
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| CN206225224U (en) * | 2016-09-18 | 2017-06-06 | 施耐德电气工业公司 | Dual-power transfer switch and the mechanism for it |
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