Dual-power automatic change-over switch

Abstract

The utility model provides a dual-power-supply automatic change-over switch comprising an installation member which is provided with a contact module, a change-over action module, a magnetic excitation driving module, a control circuit module, an arc extinguishing module and an insulation module. The magnetic excitation driving module comprises an iron core, an armature and a counter-force spring, the two ends of the counter-force spring are connected with the iron core and the armature respectively, the top of the iron core is conical, the bottom of the armature is matched with the top of the iron core, the top of the armature is connected with a first lever, and the top of the first lever is connected with a second lever. The first lever is rotationally connected to the conversion action module; the control circuit module is used for powering on or powering off the magnetic excitation driving module according to the power supply condition of the dual power supplies; and the conversion action module is connected with the contact module. By means of the technical scheme, the size of the dual-power-supply automatic change-over switch can be reduced on the premise that reliable switching is met.

Description

Technical Field

[0001] The utility model relates to the technical field of power systems, and particularly to an automatic transfer switch for dual power supplies. Background Art

[0002] An automatic transfer switch for dual power supplies (ATSE) is a device widely used in power systems. Its main function is to automatically switch the load circuit to the standby power supply when the main power supply fails or loses power, so as to ensure the continuous and reliable operation of important loads.

[0003] However, the existing automatic transfer switch for dual power supplies is relatively large in size. When optimizing the size of the automatic transfer switch for dual power supplies using existing technologies, it is difficult to ensure electrical performance and safety. Summary of the Utility Model

[0004] Embodiments of the utility model provide an automatic transfer switch for dual power supplies to ensure its electrical performance and safety while reducing its size.

[0005] To achieve the above object, the present application provides an automatic transfer switch for dual power supplies, including a contact module, a conversion action module, a magnetic excitation drive module, a control circuit module, an arc extinguishing module, and an insulation module;

[0006] The magnetic excitation drive module includes an iron core, an armature, and a reaction spring. The two ends of the reaction spring are respectively connected to the iron core and the armature. The top of the iron core is conical, the bottom of the armature cooperates with the top of the iron core, the top of the armature is connected to a first lever, and the first lever is rotatably connected to the conversion action module. The magnetic excitation drive module is configured to rotate the rotating end of the conversion action module to a specified position after the excitation coil is energized;

[0007] The control circuit module is used to supply power to or cut off power from the magnetic excitation drive module according to the power supply situation of the dual power supplies, so as to enable the contact module to realize dual power supply switching;

[0008] The conversion action module is connected to the contact module, and the conversion action module is further configured to cut off power from the magnetic excitation drive module by the control circuit module after the rotating end of the conversion action module rotates to the specified position.

[0009] Further, the contact module includes a moving contact, a first static contact, and a second static contact. The moving contact is used to connect the load to the first power supply or to connect the load to the second power supply. The first static contact is used to connect the first power supply, and the second static contact is used to connect the second power supply;

[0010] The rotating end of the conversion action module includes a first cam, and the first cam is rotatably connected to the first lever through a first bearing;

[0011] The first cam is also rotatably connected to one end of a second lever through a second bearing, the other end of the second lever is rotatably connected to a second cam, and a mounting shaft is provided at the center of the second cam. The mounting shaft is connected to at least one of the moving contacts, so that after the moving contact rotates with the second cam, it cooperates with the first static contact or the second static contact.

[0012] Further, the arc extinguishing module and the insulation module (22) form an arc extinguishing chamber, and the arc extinguishing chamber is used to accommodate the cooperating moving contact and the first static contact or to accommodate the cooperating moving contact and the second static contact.

[0013] Further, arc striking pieces are provided on both the first static contact and the second static contact;

[0014] One end of the moving contact that cooperates with the first static contact or the second static contact is provided with a first arc striking angle;

[0015] The arc extinguishing module includes a plurality of arc extinguishing grid pieces, and a second arc striking angle is provided at the bottom of the arc extinguishing grid pieces.

[0016] Further, the insulation module (22) is provided with limiting grooves for cooperating with the arc extinguishing grid pieces, and the limiting grooves are arranged in a staggered long and short pattern, so that the plurality of arc extinguishing grid pieces are densely arranged in a staggered manner.

[0017] Further, the conversion action module further includes:

[0018] A first micro switch and a second micro switch, which are configured to cut off the power supply of the magnetic excitation drive module and send an auxiliary signal for indicating the working position of the micro switch to the control circuit module after the conversion action of the conversion action module is in place.

[0019] Further, the control circuit module includes a first circuit and a second circuit. Both the first circuit and the second circuit are electrically connected to the first micro switch and the second micro switch. The first circuit is configured to supply power to a load using a first power supply, and the second circuit is configured to supply power to the load using a second power supply.

[0020] Further, the conversion action module further includes a reset handle, and the reset handle is connected to a tension spring and the magnetic excitation drive module, so that the reset handle automatically resets after manually operating the magnetic excitation drive module.

[0021] Further, an elastic pressure plate is further provided at the bottom of the iron core.

[0022] Furthermore, it also includes a mounting member and an outer case panel;

[0023] The mounting member includes a plurality of sub-mounting members, and the outer case panel cooperates with the plurality of sub-mounting members to form a case.

[0024] The above technical solution has the following technical effects:

[0025] Through the conical cooperation between the iron core and the armature, after the exciting coil is energized, a suction force is generated to drive the first lever to rotate, so that the rotating end of the conversion action module rotates to a specified position. During this process, the reaction spring is compressed. After power-off, the iron core and the armature release the pressure on the reaction spring, and the reaction spring quickly releases energy, causing the first lever to quickly rotate to the required angle;

[0026] The conical cooperation between the iron core and the armature has a greater electromagnetic suction force compared with the existing planar suction end face; the allowable adjustable range of over-voltage and under-voltage for the action of the conical armature type exciting drive module is wider, which is convenient for customers to set; on the premise of meeting reliable switching, the volume of the conical armature type exciting drive module can be made smaller, so that the volume of the dual-power automatic transfer switch is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic structural diagram of a first embodiment of a dual-power automatic transfer switch in the present invention;

[0028] Figure 2 is Figure 1 the right view of

[0029] Figure 3 is Figure 2 the sectional view of

[0030] Figure 4 is a schematic structural diagram of a second embodiment of a dual-power automatic transfer switch in the present invention;

[0031] Figure 5 is Figure 4 the schematic diagram after removing part of the mounting outer panel and the mounting member;

[0032] Figure 6 is Figure 5 the right view of

[0033] Figure 7 is Figure 6 the schematic diagram after removing part of the insulation module;

[0034] Figure 8 is Figure 7 the schematic diagram after removing part of the arc extinguishing grid sheets;

[0035] Figure 9It is the circuit diagram of the control circuit module of the second embodiment of a dual-power automatic transfer switch in the present utility model;

[0036] In the attached drawings, 1 is a mounting member, 2 is a moving contact, 3 is a first stationary contact, 4 is a second stationary contact, 6 is a first cam, 7 is a first lever, 8 is a second lever, 9 is a second cam, 10 is a mounting shaft, 11 is an arc extinguishing chamber, 12 is an arc guiding piece, 13 is an arc extinguishing grid piece, 14 is a limiting groove, 15 is an iron core, 16 is an armature, 17 is a reaction spring, 18 is an elastic pressure plate, 19 is a first microswitch, 20 is a second microswitch, 21 is an outer box plate, 22 is an insulating module, and 23 is a reset handle. Detailed implementation manners

[0037] To further illustrate each embodiment, the present utility model provides attached drawings. These attached drawings are part of the disclosure of the present utility model, mainly used to illustrate the embodiments, and can cooperate with the relevant descriptions in the specification to explain the operating principle of the embodiments. With reference to these contents, those of ordinary skill in the art should be able to understand other possible implementation manners and the advantages of the present utility model. The components in the drawings are not drawn to scale, and similar component symbols are usually used to represent similar components.

[0038] Now, the present utility model will be further described in combination with the attached drawings and detailed implementation manners.

[0039] Embodiment 1:

[0040] Refer to Figure 1 , an embodiment of a dual-power automatic transfer switch, including a contact module, a conversion action module, a magnetic excitation drive module, a control circuit module, an arc extinguishing module, and an insulating module 22.

[0041] Refer to Figures 2 to 3 , the contact module includes a moving contact 2, a first stationary contact 3, and a second stationary contact. The moving contact 2 is used to connect the load and the first power supply or to connect the load and the second power supply. The first stationary contact 3 is used to connect the first power supply, and the second stationary contact is used to connect the second power supply;

[0042] The rotating end of the conversion action module includes a first cam 6, and the first cam 6 is rotatably connected to the first lever 7 through a first bearing;

[0043] The first cam 6 is also rotatably connected to one end of a second lever 8 through a second bearing. The other end of the second lever 8 is rotatably connected to a second cam 9. A mounting shaft 10 is provided at the center of the second cam 9. The mounting shaft 10 is connected to at least one of the moving contacts 2, so that after the moving contact 2 rotates with the second cam 9, it cooperates with the first stationary contact 3 or the second stationary contact.

[0044] With this embodiment, as the first cam 6 follows the rotation of the first lever 7, the rotation of the second lever 8 is driven, which in turn causes the second cam 9 to rotate, and finally drives the moving contact 2 on the mounting shaft 10 to rotate to cooperate with the first static contact 3 or the second static contact, realizing the switching between the first power supply and the second power supply;

[0045] Through the mounting shaft 10, multiple moving contacts 2 can be connected simultaneously, and then the dual-power automatic transfer switch can perform dual-power switching on multiple loads at the same time;

[0046] In this embodiment, the protruding parts at both ends of the mounting shaft 10 are connected to the second cam 9. The mounting shaft 10 can be installed with multiple moving contacts 2. A circular isolation plate is provided on the mounting shaft 10 for isolating the installed moving contacts 2. An installation groove is also provided on the mounting shaft 10 for installing the moving contacts 2 and limiting the moving contacts 2.

[0047] Further optionally, the arc extinguishing module and the insulating module 22 form an arc extinguishing chamber 11, and the arc extinguishing chamber 11 is used to accommodate the mating moving contact 2 and the first static contact 3 or to accommodate the mating moving contact 2 and the second static contact.

[0048] With this embodiment, the arc extinguishing module can stretch and cool the generated arc, and the insulating module 22 can isolate the contact from other components and the outside world, preventing the arc from damaging other components and preventing the arc from damaging the outside world.

[0049] Still further optionally, the first static contact 3 and the second static contact are both provided with arc guide pieces 12;

[0050] One end of the moving contact 2 that cooperates with the first static contact 3 or the second static contact is provided with a first arc guide angle;

[0051] The arc extinguishing module includes a plurality of arc extinguishing grid pieces 13, and the bottom of the arc extinguishing grid pieces 13 is provided with a second arc guide angle.

[0052] With this embodiment, through the first arc guide angle on the moving contact 2, the arc can be effectively guided to the arc extinguishing chamber 11 during the process of breaking the switch;

[0053] By providing the arc guide pieces 12 and the arc extinguishing grid pieces 13, and by providing the second arc guide angle at the bottom of the arc extinguishing grid pieces 13, it is beneficial to guide the arc to the arc guide pieces 12 during the switch breaking process, reducing the damage to the static contact. At the same time, as the arc passes through the arc guide pieces 12 and the arc extinguishing grid pieces 13 in sequence, the arc can be quickly stretched and cooled until it extinguishes, and a good arc extinguishing effect can also be achieved in a small space. Then the volume of the arc extinguishing chamber 11 can be reduced, and the volume of the dual-power automatic transfer switch can be further reduced.

[0054] Further optionally, the insulation module 22 is provided with a limiting groove 14 that cooperates with the arc extinguishing grid pieces 13. The limiting grooves 14 are arranged in a staggered length pattern, so that the multiple arc extinguishing grid pieces 13 are densely arranged in a staggered manner.

[0055] With this embodiment, the arc extinguishing grid pieces 13 on the arc extinguishing chamber 11 are designed with a staggered length of the limiting grooves 14, which can effectively prevent the arc extinguishing grid pieces 13 from being placed incorrectly during manual placement, having an anti-fooling effect, and the dense arrangement can also further improve the arc extinguishing efficiency.

[0056] Of course, the opening distance of the contact can also be increased, which is beneficial to lengthen the arc and avoid reignition.

[0057] Refer to Figure 3 As shown, the magnetic excitation drive module includes an iron core 15, an armature 16, and a reaction spring 17. The two ends of the reaction spring 17 are respectively connected to the iron core 15 and the armature 16. The top of the iron core 15 is conical, the bottom of the armature 16 cooperates with the top of the iron core 15, and the top of the armature 16 is connected to the first lever 7. The first lever 7 is rotatably connected to the conversion action module. The magnetic excitation drive module is configured to rotate the rotating end of the conversion action module to a specified position after the excitation coil is energized.

[0058] With this embodiment, through the conical cooperation of the iron core 15 and the armature 16, after the excitation coil is energized, a greater electromagnetic suction force can be generated compared to the existing flat suction end face.

[0059] The allowable adjustable range of over-voltage and under-voltage for the operation of the conical armature type magnetic excitation drive module is wider, which is convenient for customers to set.

[0060] On the premise of meeting reliable switching, the volume of the conical armature type magnetic excitation drive module can be made smaller, so that the volume of the dual-power automatic transfer switch is reduced.

[0061] Further optionally, an elastic pressing plate 18 is further provided at the bottom of the iron core 15.

[0062] With this embodiment, the elastic pressing plate 18 under the iron core 15 has an energy storage function. When the coil is energized and attracted, the gap between the armature and the iron core can be reduced, increasing the suction force and having an energy storage function.

[0063] The control circuit module is used to supply power or cut off power to the magnetic excitation drive module according to the power supply situation of the dual power supply, so that the contact module realizes the dual power supply switching.

[0064] Optionally, it further includes a first microswitch 19 and a second microswitch 20, which are configured to cut off the power supply of the magnetic excitation drive module and send an auxiliary signal for indicating the working position of the microswitch to the control circuit module after the conversion action of the conversion action module is in place.

[0065] Further optionally, the control circuit module includes a first circuit and a second circuit, both of which are electrically connected to the first microswitch 19 and the second microswitch 20. The first circuit is configured to supply power to the load using a first power supply, and the second circuit is configured to supply power to the load using a second power supply.

[0066] Adopting this embodiment can automatically trigger the power-off of the microswitch, provide an auxiliary signal to indicate the working position of the switch, timely cut off the power supply to the coil, and the switch switching excitation module no longer consumes energy.

[0067] The conversion action module is connected to the contact module, and the conversion action module is further configured to cut off the power supply of the magnetic excitation drive module by the control circuit module after the rotating end of the conversion action module rotates to a specified position.

[0068] Adopting this embodiment, compared with the manual operation and motor drive forms, the conversion action operation module applied this time is independent of manual operation, and is common for manual and electric use. By pressing the counterforce spring 17 to compress and store energy, when the lever rotates to a certain angle, the iron core releases the pressure on the counterforce spring 17, and the counterforce spring 17 quickly releases energy. The conversion time is short, the switching speed is faster, and after being in place, it triggers the power-off of the microswitch, and the energization time of the coil module is short;

[0069] This module has only two positions, ensuring a reliable switching process and the module switching in place;

[0070] After the conversion action is in place, it can trigger the power-off of the microswitch, provide an auxiliary signal to indicate the working position of the switch, timely cut off the power supply to the coil, and the switch switching excitation module no longer consumes energy.

[0071] Optionally, the conversion action module further includes a reset handle 23, and the reset handle 23 is connected to the tension spring and the magnetic excitation drive module, so that the reset handle 23 automatically resets after manual operation on the magnetic excitation drive module.

[0072] Adopting this embodiment, the reset handle 23 cooperates with the tension spring structure, and can achieve automatic reset after each manual operation, which is convenient for customers to operate.

[0073] Optionally, it further includes a mounting member 1 and an outer box plate 21;

[0074] The mounting member 1 includes a plurality of sub-mounting members, and the outer box plate 21 cooperates with the plurality of sub-mounting members to form a box body.

[0075] Adopting this embodiment can prevent external foreign objects from affecting and damaging the components of the automatic transfer switch for dual power sources.

[0076] Embodiment 2:

[0077] A second embodiment of an automatic transfer switch for dual power sources;

[0078] Refer to Figures 4 to 9 , in this embodiment, it further includes an outer box plate 21. The mounting member 1 includes a plurality of sub-mounting members, and the outer box plate 21 cooperates with the plurality of sub-mounting members to form a box body;

[0079] Four moving contacts 2 are provided on the mounting shaft 10. Load terminals for connecting loads are provided on the mounting sub-plates corresponding to the moving contacts 2. Each moving contact 2 respectively cooperates with the first static contact 3 above it and the second static contact below it. First power supply terminals for connecting the first power supply are provided on the mounting sub-plates corresponding to the first static contacts 3, and second power supply terminals for connecting the second power supply are provided on the mounting sub-plates corresponding to the second static contacts;

[0080] Correspondingly, eight arc extinguishing chambers 11 are provided. In each arc extinguishing chamber 11, arc guiding pieces 12 are provided on both the first static contact 3 and the second static contact. One end of the moving contact 2 that cooperates with the first static contact 3 or the second static contact is provided with a first arc guiding angle. The arc extinguishing module includes a plurality of arc extinguishing grid pieces 13. The bottom of the arc extinguishing grid pieces 13 is provided with a second arc guiding angle. Refer to Figure 8 , the insulating module 22 is provided with limiting grooves 14 that cooperate with the arc extinguishing grid pieces 13. The limiting grooves 14 are arranged in a staggered long and short pattern, so that the plurality of arc extinguishing grid pieces 13 are densely arranged in a staggered manner, and the opening distances between the sub-contacts of each contact are also correspondingly increased.

[0081] In this embodiment, the magnetic excitation driving module includes an iron core 15, an armature 16 and a reaction spring 17. The two ends of the reaction spring 17 are respectively connected to the iron core 15 and the armature 16. The top of the iron core 15 is conical, and an elastic pressing plate 18 is further provided at the bottom of the iron core 15. The bottom of the armature 16 cooperates with the top of the iron core 15. The top of the armature 16 is connected to a first lever 7, and the first lever 7 is rotatably connected to the conversion action module.

[0082] In this embodiment, the rotating end of the conversion action module includes a first cam 6. The first cam 6 is rotatably connected to the first lever 7 through a first bearing. The first cam 6 is provided with a first microswitch 19 and a second microswitch 20. After the conversion action of the conversion action module is in place, the magnetic excitation drive module is powered off and an auxiliary signal for indicating the working position of the microswitch is sent to the control circuit module.

[0083] The first cam 6 is also rotatably connected to one end of a second lever 8 through a second bearing. The other end of the second lever 8 is rotatably connected to a second cam 9. The center of the second cam 9 is provided with a mounting shaft 10.

[0084] In this embodiment, the control circuit module includes a first loop and a second loop. Both the first loop and the second loop are electrically connected to the first microswitch 19 and the second microswitch 20. The first loop is configured to supply power to a load using a first power source, and the second loop is configured to supply power to the load using a second power source.

[0085] Specifically, referring to Figure 5 , this embodiment provides a control circuit module. When the main power supply, the first power source, supplies power, the external control system supplies control voltage to the coil of the KM1 contactor through ports A1 and A2, thereby causing the main circuit KM1 of the contactor to conduct. The alternating current is adjusted to direct current through the rectifier device structure, and the excitation coil is instantly powered on and triggers the action of the dual-power switch switching mechanism, realizing the switching of the main circuit from the standby power source to the normal power source position. After the switch switching mechanism is in place, it will trigger the action of the K1 microswitch, and the normally open signal on the original K1 microswitch becomes disconnected, thereby cutting off the coil control voltage supply of the contactor KM1, causing the main circuit KM1 of the contactor to disconnect, the excitation coil to stop being powered, and the switch switching excitation mechanism to stop consuming energy. At the same time, it will also cause the action of the ka and kb microswitches, and the contact auxiliary signals a, a1 and b, b2 become conductive, outputting a feedback working power source position signal.

[0086] Conversely, when the main power supply is cut off or fails, and the standby power supply (the second power supply) is operating normally, the external control system supplies control voltage to the coil of contactor KM2 through ports B1 and B2, thereby causing the main circuit of the contactor KM2 to conduct. The alternating current is adjusted to direct current through the rectifier device structure. The excitation coil is instantly powered on and triggers the action of the dual-power switch switching mechanism, realizing the switching of the main circuit from the normal power supply to the standby power supply position. After the switch switching mechanism is in place, it will trigger the action of the K2 microswitch. The normally closed signal on the original K2 microswitch becomes open, thus cutting off the control voltage supply to the coil of contactor KM2, causing the main circuit of the contactor KM2 to disconnect. The excitation coil is no longer powered, and the switch switching excitation mechanism no longer consumes energy. At the same time, it will also cause the ka and kb microswitches to act, and the contact auxiliary signals a, a2 and b, b1 become conductive, outputting the feedback signal of the working power supply position.

[0087] The entire control circuit can ensure the orderly switching between the two power supplies, ensure the timely power supply to the load, and at the same time, after the switching is in place, it can cut off the power supply to the coil in a timely manner, ensuring that the coil will not be in the on and heating state for a long time, effectively outputting the feedback signal of the switch working position, and ensuring the reliability of the switch switching.

[0088] Therefore, in summary, through the cooperation of the installation of the daughter board and the outer box board 21 in this embodiment, it is realized to prevent foreign objects from the outside from affecting and damaging the components of the automatic dual-power switch;

[0089] By installing the shaft 10 and the four moving contacts 2, the power supply switching for four loads is realized simultaneously;

[0090] Through the dense arrangement of the arc extinguishing grid plates 13, the cooperation of the first arc guiding angle on the moving contact 2 and the arc guiding piece 12 of the static contact, while ensuring the arc extinguishing effect, the volume of the arc extinguishing chamber 11 is reduced, realizing the reduction of the volume of the automatic dual-power switch;

[0091] Through the tapered cooperation of the iron core 15 and the armature 16, the volume of the power mechanism is reduced, and then the volume of the automatic dual-power switch is reduced;

[0092] Through the control circuit, it is realized to ensure the timely power supply to the load, and at the same time, after the switching is in place, it can cut off the power supply to the coil in a timely manner, ensuring that the coil will not be in the on and heating state for a long time, effectively outputting the feedback signal of the switch working position, and ensuring the reliability of the switch switching;

[0093] Finally, it is realized that while ensuring electrical safety, the volume of the automatic dual-power switch is reduced, and a faster power conversion is achieved.

[0094] Although the present utility model is specifically shown and described in connection with preferred embodiments, those skilled in the art should understand that various changes may be made to the present utility model in form and detail without departing from the spirit and scope of the present utility model as defined by the appended claims, and all such changes are within the scope of protection of the present utility model.

Claims

1. A dual power automatic transfer switch, characterized in that: include: Contact module, switching action module, magnetic excitation drive module, control circuit module, arc extinguishing module and insulation module (22); The magnetic excitation drive module comprises an iron core (15), an armature (16) and a reaction spring (17), the two ends of the reaction spring (17) are respectively connected to the iron core (15) and the armature (16), the top of the iron core (15) is conical, the bottom of the armature (16) cooperates with the top of the iron core (15), the top of the armature (16) is connected to a first lever (7), the first lever (7) is rotatably connected to the conversion action module, and the magnetic excitation drive module is configured to rotate the rotating end of the conversion action module to a specified position after the excitation coil is energized; The control circuit module is used to power on or off the magnetic excitation drive module according to the power supply status of the dual power supplies, so that the contact module can achieve dual power supply switching; The conversion action module is connected to the contact module, and is further configured to cause the control circuit module to cut off power to the magnetic excitation drive module after the rotating end of the conversion action module rotates to a specified position.

2. The dual power automatic transfer switch according to claim 1, characterized in that: The contact module comprises a moving contact (2), a first stationary contact (3) and a second stationary contact, the moving contact (2) being used to connect a load and a first power source or to connect a load and a second power source, the first stationary contact (3) being used to connect the first power source, and the second stationary contact being used to connect the second power source; The rotating end of the conversion action module comprises a first cam (6), and the first cam (6) is rotatably connected to the first lever (7) via a first bearing; The first cam (6) is also rotatably connected to one end of a second lever (8) via a second bearing, and the other end of the second lever (8) is rotatably connected to a second cam (9). A mounting shaft (10) is provided at the center of the second cam (9), and the mounting shaft (10) is connected to at least one of the moving contacts (2), so that the moving contact (2) cooperates with the first stationary contact (3) or the second stationary contact after rotating with the second cam (9).

3. The dual power automatic transfer switch according to claim 2 is characterized in that: The arc extinguishing module and the insulating module (22) form an arc extinguishing chamber (11), and the arc extinguishing chamber (11) is used to accommodate the matched moving contact (2) and the first stationary contact (3) or to accommodate the matched moving contact (2) and the second stationary contact.

4. The dual power automatic transfer switch according to claim 3 is characterized in that: The first stationary contact (3) and the second stationary contact are both provided with arc-starting pieces (12); One end of the moving contact (2) that cooperates with the first stationary contact (3) or the second stationary contact is provided with a first arc striking angle; The arc extinguishing module comprises a plurality of arc extinguishing grids (13), and a second arc striking angle is provided at the bottom of the arc extinguishing grids (13).

5. The dual power automatic transfer switch according to claim 4, characterized in that: The insulating module (22) is provided with a limiting groove (14) matching the arc-extinguishing grid pieces (13); the limiting grooves (14) are arranged in a staggered manner in length, so that a plurality of the arc-extinguishing grid pieces (13) are densely and staggeredly arranged.

6. The dual power automatic transfer switch according to claim 1, characterized in that: The conversion action module also includes: A first micro switch (19) and a second micro switch (20), wherein the first micro switch (19) and the second micro switch (20) are configured to cut off power to the magnetic excitation drive module and send an auxiliary signal for indicating the working position of the micro switch to the control circuit module after the conversion action of the conversion action module is in place.

7. The dual power automatic transfer switch according to claim 6, characterized in that: The control circuit module comprises a first circuit and a second circuit, wherein the first circuit and the second circuit are both electrically connected to the first micro switch (19) and the second micro switch (20), the first circuit is configured to use a first power supply to supply power to a load, and the second circuit is configured to use a second power supply to supply power to the load.

8. The dual power automatic transfer switch according to claim 1, characterized in that: The conversion action module further comprises a reset handle (23), wherein the reset handle (23) is connected to a tension spring and the magnetic excitation drive module, so that the reset handle (23) is automatically reset after the magnetic excitation drive module is manually operated.

9. The dual power automatic transfer switch according to claim 1, characterized in that: An elastic pressing plate (18) is also provided at the bottom of the iron core (15).

10. The dual power automatic transfer switch according to claim 1, characterized in that: Also includes: A mounting member (1) and a box outer plate (21); The mounting member (1) comprises a plurality of sub-mounting members, and the outer panel (21) of the box body cooperates with the plurality of sub-mounting members to form a box body.

Images