CN110970240A - Control circuit for dual-power automatic transfer switch and dual-power automatic transfer switch - Google Patents
Control circuit for dual-power automatic transfer switch and dual-power automatic transfer switch Download PDFInfo
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- CN110970240A CN110970240A CN201811155281.2A CN201811155281A CN110970240A CN 110970240 A CN110970240 A CN 110970240A CN 201811155281 A CN201811155281 A CN 201811155281A CN 110970240 A CN110970240 A CN 110970240A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H3/00—Mechanisms for operating contacts
- H01H3/22—Power arrangements internal to the switch for operating the driving mechanism
- H01H3/28—Power arrangements internal to the switch for operating the driving mechanism using electromagnet
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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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Abstract
A control circuit for a dual power automatic transfer switch, the dual power automatic transfer switch comprising a first electromagnet controlling a first power supply and a second electromagnet controlling a second power supply; wherein the control circuit comprises: the first electromagnet is connected in series with a first microswitch and a first rotary disc switch which are connected together in parallel, so that a first branch circuit is formed, and the first microswitch controls the on-off of the first electromagnet; the second electromagnet is connected in series to a second microswitch and a second rotary disc switch which are connected together in parallel, so that a second branch circuit is formed, and the second microswitch controls the on-off of the second electromagnet; the first and second branch circuits are connected in parallel. A dual power automatic transfer switch includes the control circuit as described above.
Description
Technical Field
The present disclosure relates to a control circuit for a dual power automatic transfer switch. The disclosure also relates to a dual power automatic transfer switch comprising the control circuit.
Background
A dual power Automatic Transfer Switch (ATSE) has two positions and three positions. The movable contact of the two-position ATSE is connected with the fixed contact of the first power supply or the fixed contact of the second power supply, so that the load is always electrified except at the moment of conversion. The movable contact of the three-position ATSE may stay at an intermediate position, i.e., a double-split position, not connected to the first power source and the second power source, in addition to being connected to the first power source or the second power source. Typically, such a three-position ATSE requires three or four electromagnets to be provided to effect switching between the three positions, thereby requiring a number of corresponding microswitches to control the switching of the electromagnets on and off. The prior art also adopts three electromagnets and adds a very complicated mechanical structure to realize the switching control, but the operation mode of the prior art is not good for users, namely, the users cannot easily understand how to operate the switching control. In addition, the reliability of the mechanical operation of the product is also low.
Disclosure of Invention
The present disclosure utilizes an innovative mechanical structure and employs a simple control circuit, making the three-position ATSE product simpler in structure, more reliable in performance, and more versatile in controller.
According to one aspect of the present disclosure, a control circuit for a dual power automatic transfer switch is provided that includes a first electromagnet that controls a first power source and a second electromagnet that controls a second power source.
The control circuit includes: the first electromagnet is connected to a first micro switch so as to form a first branch circuit, and the first micro switch controls the on-off of the first electromagnet; the second electromagnet is connected to a second micro switch so as to form a second branch circuit, and the second micro switch controls the on-off of the second electromagnet; the first and second branch circuits are connected in parallel.
According to the above aspect of the present disclosure, the dual power automatic transfer switch includes a first close driving lever, a first close holding elastic member, and a first electromagnet plunger position status lever.
The first electromagnet movable iron core position state rod is used for driving the first closing driving rod along with the movement of the first electromagnet, so that the state of the first microswitch is changed.
The dual-power automatic transfer switch further comprises a second closed driving rod, a second closed keeping elastic piece and a second electromagnet movable iron core position state rod.
The second electromagnet moving iron core position state rod is used for driving the second closing driving rod along with the movement of the second electromagnet, so that the state of the second microswitch is changed.
According to the above aspects of the present disclosure, the dual power automatic transfer switch includes an intermediate turntable.
A first bulge and a second bulge as well as a first rotary disc switch and a second rotary disc switch are arranged on the middle rotary disc; wherein the first rotary switch is connected in parallel with the first microswitch; the second rotary disk switch is connected with the second microswitch in parallel.
When the first power source is closed, the first rotary disk switch is in an open state, and the second rotary disk switch is in a closed state.
With the rotation of the middle turntable, the opening state of the first turntable switch is kept unchanged, and the second turntable switch is changed from the opening state to the closing state when the dual-power automatic transfer switch is in the double-division state.
According to the above aspects of the present disclosure, the reciprocating motion of the first and second electromagnets may actuate the motion of the first and second protrusions.
The movement of the first protrusion and the second protrusion drives the rotation of the middle rotating disc, so that the opening and closing states of moving contacts of the first power supply and the second power supply are changed, the dual-power automatic transfer switch can be switched from the state that the second power supply is closed and the first power supply is simultaneously in the opening state to the state that the second power supply is in the opening state and the first power supply is simultaneously in the closing state, then the dual-power automatic transfer switch is switched to the state that the second power supply and the first power supply are both in the opening state (dual-split state), and finally the dual-power automatic transfer switch can be switched back to the state that the second power supply is in the closing state and the first power supply is simultaneously in the opening state.
According to the above aspects of the present disclosure, when the second power source is in the closed state, the plunger of the first electromagnet and the plunger position state lever of the first electromagnet are in the extended positions, and the first microswitch is in the closed state under the action of the first closing holding elastic member.
Along with the movement of the movable iron core of the first electromagnet towards the contraction position, the movable iron core of the first electromagnet starts to pull the first protrusion, the middle turntable starts to rotate, the first microswitch keeps a closed state, and the second power supply keeps a closed state.
When the movable iron core of the first electromagnet continuously pulls the first bulge and moves to the contraction position of the first bulge, the position state rod of the movable iron core of the first electromagnet actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in an opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece.
And the first micro switch is kept in an on state, the first electromagnet stops moving, the second power supply is in an on state due to the rotation of the middle rotating disc, and the first power supply is in an on state.
According to the above aspects of the present disclosure, the plunger of the first electromagnet moves toward the extended position thereof after moving to the retracted position thereof, and after reaching the extended position, the first electromagnet plunger position status lever actuates the first closing driving lever, which drives the first microswitch to be in the closed state, and the first microswitch keeps in the closed state under the action of the first closing maintaining elastic member.
With the movement of the movable iron core of the first electromagnet towards the contraction position of the movable iron core, the movable iron core of the first electromagnet starts to pull the second protrusion, the middle turntable starts to rotate, the first microswitch keeps a closed state, and the second power supply keeps an open state.
When the movable iron core of the first electromagnet continuously pulls the second protrusion and moves to the contraction position of the second protrusion again, the position state rod of the movable iron core of the first electromagnet actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in an opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece.
And the first micro switch is kept in an open state, the first electromagnet stops moving, the second power supply is in an open state due to the rotation of the middle turntable, and the first power supply is in a closed state.
According to the above aspects of the disclosure, the plunger of the first electromagnet moves toward the extended position again after moving to the retracted position, and after reaching the extended position, the first electromagnet plunger position status lever actuates the first closing driving lever, the first closing driving lever drives the first microswitch to be in the closed state, and the first microswitch keeps in the closed state under the action of the first closing maintaining elastic piece.
With the movement of the movable iron core of the first electromagnet towards the contraction position again, the movable iron core of the first electromagnet cannot pull the first protrusion or the second protrusion, and the intermediate turntable cannot rotate.
When the movable iron core of the first electromagnet moves to the contraction position again, the first electromagnet movable iron core position state rod actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in the opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece.
According to another aspect of the present disclosure, there is provided a dual power automatic transfer switch, characterized in that it comprises the control circuit as described above.
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 a schematic diagram of a control circuit for a dual power supply automatic transfer switch according to the present disclosure;
FIG. 2 illustrates a movable core of a first electromagnet and a movable core position status lever of the first electromagnet in an extended position and a first micro-switch in a closed state when a second power supply for a dual power automatic transfer switch according to the present disclosure is in a closed state;
fig. 3 shows the plunger of the first electromagnet moving towards the retracted position and pulling the first protrusion to rotate the intermediate turntable, the first microswitch being in the closed state;
fig. 4 shows the plunger of the first electromagnet moved to a retracted position with the first microswitch in a closed state;
FIG. 5 shows the plunger of the first electromagnet in a retracted position, the first electromagnet plunger position status lever actuating the first closure drive lever, the first closure drive lever driving the first microswitch in an open state;
fig. 6 shows the plunger of the first electromagnet returning to the extended position, the first electromagnet plunger position status lever has not actuated the first closure drive lever, and the first microswitch is still open;
figures 7-10 illustrate the motion of figures 2-5 repeated for a dual power automatic transfer switch according to the present disclosure, wherein the plunger of the first electromagnet pulls the second protrusion;
fig. 11-12 show the first electromagnet again returning from the extended position to the retracted position, ready for the next operation, with the intermediate turntable inactive.
Detailed Description
The following describes the dual power automatic transfer switch mechanism according to the present disclosure with reference to the drawings.
The dual power automatic transfer switch includes a first electromagnet 1 controlling a first power source and a second electromagnet 2 controlling a second power source (see fig. 2).
The main idea is that a control circuit comprises: the first electromagnet 1 is connected to a first micro switch 1-1 so as to form a first branch circuit, and the first micro switch 1-1 controls the on-off of the first electromagnet 1; the second electromagnet is connected to a second micro switch 2-1 so as to form a second branch circuit, and the second micro switch 2-1 controls the on-off of the second electromagnet 2; the first and second branch circuits are connected in parallel.
For another example, the embodiment of fig. 1 shows a schematic diagram of a control circuit for a dual power supply automatic transfer switch according to the present disclosure, the control circuit comprising: the first electromagnet 1 is connected in series with a first microswitch 1-1 and a first rotary disc switch 1-2 which are connected together in parallel, so that a first branch circuit is formed, and the first microswitch 1-1 controls the on-off of the first electromagnet 1; the second electromagnet is connected in series with a second microswitch 2-1 and a second rotary disc switch 2-2 which are connected together in parallel, so that a second branch circuit is formed, and the second microswitch 2-1 controls the on-off of the second electromagnet 2; the first and second branch circuits are connected in parallel.
According to the above-described embodiment of the present disclosure, as shown in fig. 2, the dual power automatic transfer switch includes the first close driving lever 3, the first close holding elastic member 4, and the first electromagnet core position state lever 5, which correspond to the first electromagnet 1 at the upper portion in fig. 2. The first electromagnet plunger position status lever 5 is used for driving the first closing driving lever 3 along with the movement of the first electromagnet 1, so as to change the state of the first microswitch 1-1.
Symmetrically, corresponding to the second electromagnet 2 in the lower part of fig. 2, there are provided a respective second closure driving lever, a second closure holding elastic member and a second electromagnet moving core position status lever (not shown for simplicity). The second electromagnet moving core position state rod is used for driving the second closing driving rod along with the movement of the second electromagnet 2, so that the state of the second microswitch 2-1 is changed.
According to the above-described various embodiments of the present disclosure, the dual power automatic transfer switch further includes the intermediate dial 6.
A first protrusion 6-1 and a second protrusion 6-2 and the first rotary switch 1-2 and the second rotary switch 2-2 are provided on the intermediate rotary disk 6 (see fig. 1); wherein when the first power source is closed, the first rotary disk switch 1-2 is in an open state and the second rotary disk switch 2-2 is in a closed state.
The first bulges 6-1 are arranged in pairs relative to the diameter of the middle rotating disc 6; said first projections 6-2 are arranged in pairs with respect to the diameter of the intermediate turntable 6. The first protrusions 6-1 and the second protrusions 6-2 arranged in pairs form a radial included angle therebetween.
With the rotation of the middle rotating disk 6, the open state of the first rotating disk switch 1-2 is kept unchanged, and the second rotating disk switch 2-2 is changed from the open state to the closed state when the dual-power automatic transfer switch is in the double-split state.
According to the above various embodiments of the present disclosure, the reciprocating motion of the first electromagnet 1 and the second electromagnet 2 can actuate the motion of the first protrusion 6-1 and the second protrusion 6-2.
The movement of the first protrusion 6-1 and the second protrusion 6-2 drives the rotation of the intermediate rotating disc 6, so as to change the open/close state of the respective moving contacts of the first power supply and the second power supply, so that the dual-power automatic transfer switch can be switched from the state where the second power supply is closed and the first power supply is simultaneously in the open state to the state where the second power supply is open and the first power supply is simultaneously in the closed state to the state where the second power supply and the first power supply are both in the open state (double split state), and finally can be switched back to the state where the second power supply is closed and the first power supply is simultaneously in the open state in a circulating manner.
The present disclosure makes the three-position ATSE product simpler in structure, more reliable in performance, and more versatile in controller, using innovative mechanical structure and using a simple control circuit.
The following describes the movement process of the dual power automatic transfer switching mechanism according to the present disclosure in detail with reference to fig. 2 to 12.
According to the above embodiments of the present disclosure, when the second power source is in the closed state, the plunger of the first electromagnet 1 and the plunger position status lever 5 of the first electromagnet are in the extended position, and under the action of the first closing holding elastic member 4, the first microswitch 1-1 is in the closed state, as shown in fig. 2.
As shown in fig. 3, as the plunger of the first electromagnet 1 moves towards its retracted position, the plunger of the first electromagnet 1 starts to pull the first protrusion 6-1, the intermediate rotating disc 6 starts to rotate, and under the action of the first closing and holding elastic element 4, the first microswitch 1-1 is kept in a closed state, and the second power supply is kept in a closed state.
When the movable iron core of the first electromagnet 1 continues to pull the first protrusion 6-1 and moves to the contraction position thereof, as shown in fig. 4-5, the first electromagnet movable iron core position status lever 5 actuates the first closing driving lever 3, the first closing driving lever 3 drives the first microswitch 1-1 to be in the open state, and the first microswitch 1-1 keeps in the open state under the action of the first closing keeping elastic piece 4.
The first electromagnet 1 stops moving because the first microswitch 1-1 is kept in an open state, and at the moment, the second power supply is in an open state and the first power supply is in an open state because the intermediate rotating disc 6 rotates.
According to the above embodiments of the present disclosure, as shown in fig. 6 to 7, the plunger of the first electromagnet 1 moves to its retracted position and then moves to its extended position, after reaching the extended position, the first electromagnet plunger position status lever 5 actuates the first closing driving lever 3, the first closing driving lever 3 drives the first micro switch 1-1 to be in the closed state, and the first micro switch 1-1 is kept in the closed state under the action of the first closing keeping elastic element 4.
As shown in fig. 8, as the plunger of the first electromagnet 1 moves toward its retracted position again, the plunger of the first electromagnet 1 starts to pull the second protrusion 6-2, the intermediate rotating disk 6 starts to rotate, the first microswitch 1-1 is kept in a closed state, and the second power supply is kept in an open state.
As shown in fig. 9-10, when the plunger of the first electromagnet 1 continues to pull the second protrusion 6-2 and moves to its retracted position again, the first electromagnet plunger position status lever 5 actuates the first closing driving lever 3, the first closing driving lever 3 drives the first microswitch 1-1 to be in an opened state, and the first microswitch 1-1 is kept in the opened state under the action of the first closing keeping elastic element 4.
The first electromagnet stops moving because the first microswitch 1-1 is kept in an open state, and at the moment, the second power supply is in an open state and the first power supply is in a closed state because of the rotation of the intermediate rotating disc 6.
According to the above embodiments of the present disclosure, as shown in fig. 11, the plunger of the first electromagnet 1 moves to its retracted position and then moves to its extended position again, after reaching the extended position, the first electromagnet plunger position status lever 5 actuates the first closing driving lever 3, the first closing driving lever 3 drives the first micro switch 1-1 to be in a closed state, and the first micro switch 1-1 is kept in the closed state under the action of the first closing keeping elastic element 4.
As shown in fig. 12, as the plunger of the first electromagnet 1 moves toward its retracted position again, the plunger of the first electromagnet 1 does not pull the first or second protrusion, and the intermediate turntable 6 does not rotate.
When the movable iron core of the first electromagnet 1 moves to the contraction position again, the first electromagnet movable iron core position state rod 5 actuates the first closing driving rod 3, the first closing driving rod 3 drives the first microswitch 1-1 to be in the opening state, and the first microswitch 1-1 keeps in the opening state under the action of the first closing keeping elastic piece 4.
According to another embodiment of the present disclosure, a dual power automatic transfer switch is provided that includes a control circuit as described in the various implementations 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. A control circuit for a dual-power automatic transfer switch is characterized in that,
the dual-power automatic transfer switch comprises a first electromagnet for controlling a first power supply and a second electromagnet for controlling a second power supply; wherein
The control circuit includes:
the first electromagnet is connected to a first micro switch so as to form a first branch circuit, and the first micro switch controls the on-off of the first electromagnet;
the second electromagnet is connected to a second micro switch so as to form a second branch circuit, and the second micro switch controls the on-off of the second electromagnet;
the first and second branch circuits are connected in parallel.
2. The control circuit of claim 1,
the dual-power automatic transfer switch comprises a first closing driving rod, a first closing keeping elastic piece and a first electromagnet movable iron core position state rod;
the first electromagnet movable iron core position state rod is used for driving the first closing driving rod along with the movement of the first electromagnet, so that the state of the first microswitch is changed;
the dual-power automatic transfer switch also comprises a second closing driving rod, a second closing keeping elastic piece and a second electromagnet movable iron core position state rod;
the second electromagnet moving iron core position state rod is used for driving the second closing driving rod along with the movement of the second electromagnet, so that the state of the second microswitch is changed.
3. The control circuit of claim 2,
the dual-power automatic transfer switch comprises an intermediate turntable;
a first bulge and a second bulge as well as a first rotary disc switch and a second rotary disc switch are arranged on the middle rotary disc; wherein
The first rotary disc switch is connected with the first microswitch in parallel;
the second rotary disc switch is connected with the second microswitch in parallel;
when the first power supply is closed, the first rotary disk switch is in an open state, and the second rotary disk switch is in a closed state;
with the rotation of the middle turntable, the opening state of the first turntable switch is kept unchanged, and the second turntable switch is changed from the opening state to the closing state when the dual-power automatic transfer switch is in the double-division state.
4. The control circuit of claim 3,
the reciprocating motion of the first electromagnet and the second electromagnet can actuate the motion of the first protrusion and the second protrusion;
the movement of the first protrusion and the second protrusion drives the rotation of the middle rotating disc, so that the opening and closing states of moving contacts of the first power supply and the second power supply are changed, the dual-power automatic transfer switch can be switched from the state that the second power supply is closed and the first power supply is simultaneously in the opening state to the state that the second power supply is in the opening state and the first power supply is simultaneously in the closing state, then the dual-power automatic transfer switch is switched to the state that the second power supply and the first power supply are both in the opening state (dual-split state), and finally the dual-power automatic transfer switch can be switched back to the state that the second power supply is in the closing state and the first power supply is simultaneously in the opening state.
5. The control circuit of claim 4,
when the second power supply is in a closed state, the movable iron core of the first electromagnet and the position state rod of the movable iron core of the first electromagnet are in extended positions, and the first microswitch is in a closed state under the action of the first closing and maintaining elastic piece;
along with the movement of the movable iron core of the first electromagnet towards the contraction position, the movable iron core of the first electromagnet starts to pull the first protrusion, the middle turntable starts to rotate, the first microswitch keeps a closed state, and the second power supply keeps a closed state;
when the movable iron core of the first electromagnet continuously pulls the first bulge and moves to the contraction position of the first bulge, the first electromagnet movable iron core position state rod actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in an opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece;
and the first micro switch is kept in an on state, the first electromagnet stops moving, the second power supply is in an on state due to the rotation of the middle rotating disc, and the first power supply is in an on state.
6. The control circuit of claim 5,
the movable iron core of the first electromagnet moves to the retracted position and then moves towards the extended position, after the movable iron core of the first electromagnet reaches the extended position, the position state rod of the movable iron core of the first electromagnet actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in a closed state, and the first microswitch keeps in a closed state under the action of the first closing keeping elastic piece;
with the movement of the movable iron core of the first electromagnet towards the contraction position of the movable iron core of the first electromagnet again, the movable iron core of the first electromagnet starts to pull the second protrusion, the middle turntable starts to rotate, the first microswitch keeps a closed state, and the second power supply keeps an open state;
when the movable iron core of the first electromagnet continuously pulls the second protrusion and moves to the contraction position again, the first electromagnet movable iron core position state rod actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in an opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece;
and the first micro switch is kept in an open state, the first electromagnet stops moving, the second power supply is in an open state due to the rotation of the middle turntable, and the first power supply is in a closed state.
7. The control circuit of claim 6,
the movable iron core of the first electromagnet moves to the contraction position and then moves towards the extension position again, after the movable iron core of the first electromagnet reaches the extension position, the position state rod of the movable iron core of the first electromagnet actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in a closing state, and the first microswitch keeps in the closing state under the action of the first closing keeping elastic piece;
with the movement of the movable iron core of the first electromagnet towards the contraction position again, the movable iron core of the first electromagnet cannot pull the first or second protrusion, and the intermediate turntable cannot rotate;
when the movable iron core of the first electromagnet moves to the contraction position again, the first electromagnet movable iron core position state rod actuates the first closing driving rod, the first closing driving rod drives the first microswitch to be in the opening state, and the first microswitch keeps in the opening state under the action of the first closing keeping elastic piece.
8. A dual power automatic transfer switch, characterized in that it comprises a control circuit according to one of the preceding claims.
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| CN201811155281.2A CN110970240B (en) | 2018-09-30 | 2018-09-30 | Control circuit for dual-power automatic transfer switch and dual-power automatic transfer switch |
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| CN201811155281.2A CN110970240B (en) | 2018-09-30 | 2018-09-30 | Control circuit for dual-power automatic transfer switch and dual-power automatic transfer switch |
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| CN110970240B CN110970240B (en) | 2022-09-27 |
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| CN207925333U (en) * | 2017-11-30 | 2018-09-28 | 施耐德电器工业公司 | Double power supply automatic transfer switch and its electromagnetic drive mechanism |
| CN109859965A (en) * | 2017-11-30 | 2019-06-07 | 施耐德电器工业公司 | Double power supply automatic transfer switch and its electromagnetic drive mechanism |
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| CN110970240B (en) | 2022-09-27 |
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