CN212461530U - Electromagnetic relay capable of being applied to three-phase alternating current - Google Patents
Electromagnetic relay capable of being applied to three-phase alternating current Download PDFInfo
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- CN212461530U CN212461530U CN202022017663.8U CN202022017663U CN212461530U CN 212461530 U CN212461530 U CN 212461530U CN 202022017663 U CN202022017663 U CN 202022017663U CN 212461530 U CN212461530 U CN 212461530U
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Abstract
The utility model discloses an electromagnetic relay applicable to three-phase alternating current, which comprises a base and a magnetic circuit part, wherein the magnetic circuit part comprises a coil rack provided with an iron core and an enameled wire, an armature and a yoke connected with the iron core, the coil rack is horizontally arranged on the base, and the armature is arranged at the knife edge of the yoke and is matched with the pole surface of the iron core; the movable spring part and the static spring part are respectively arranged on the base and are correspondingly matched with each other; the armature is connected with the movable spring part of each contact unit through a pushing card so as to drive each movable spring part to act. The utility model discloses not only be applicable to the three-phase alternating current, still have the function of monostable, and can utilize the promotion card to realize forcing the direction, thereby improve the utility model discloses a security performance.
Description
Technical Field
The utility model relates to an electromagnetic relay especially relates to an electromagnetic relay that can be applied to three-phase alternating current.
Background
An electromagnetic relay is a relay which uses electromagnetic force to drive mechanical parts to move relatively to generate a predetermined response, and generally comprises a magnetic circuit part, a movable spring part, a static spring part, a base and a shell, wherein the magnetic circuit part comprises an iron core, a coil rack wound with an enameled wire, an armature, a yoke and the like. When the coil (namely the enameled wire) passes through the current, electromagnetic force is generated, the armature is attracted and is contacted with a pole face at one end of the iron core, so that the movable contact of the movable spring part is driven to be contacted with or separated from the static contact of the static spring part; when the current in the coil disappears, the electromagnetic force disappears, the armature resets and is separated from the pole face at one end of the iron core, and therefore the movable contact of the movable spring part is separated from or contacts with the fixed contact of the fixed spring part. The purpose of conducting or cutting off the circuit is achieved through the contact or separation of the movable contact and the fixed contact.
The electromagnetic relay in the prior art is generally suitable for a single-phase circuit, only a few electromagnetic relays are suitable for three-phase alternating current, but the electromagnetic relay does not have the monostable function, and does not have the forced guiding function and the like.
SUMMERY OF THE UTILITY MODEL
The utility model discloses to the technical problem that prior art exists, provide an electromagnetic relay that can be applied to three-phase alternating current.
The utility model provides a technical scheme that its technical problem adopted is: an electromagnetic relay applicable to three-phase alternating current comprises a base and a magnetic circuit part, wherein the magnetic circuit part comprises a coil rack provided with an iron core and an enameled wire, an armature and a yoke connected with the iron core, the coil rack is horizontally arranged on the base, and the armature is arranged at a knife edge of the yoke and matched with a pole surface of the iron core; the movable spring part and the static spring part are respectively arranged on the base and are correspondingly matched with each other; the armature is connected with the movable spring part of each contact unit through a pushing card so as to drive each movable spring part to act.
Furthermore, the magnetic circuit part and the contact units are respectively positioned in different cavities of the base.
Further, the leading-out pins of the movable spring part and the leading-out pins of the static spring part are positioned at two opposite ends of the base.
Furthermore, an insulating connecting piece is arranged at one end of the pushing card, the connecting piece is provided with a slot, and one end, far away from the pole face of the iron core, of the armature is inserted into the slot and is wrapped by the slot.
Furthermore, the part of the armature iron matched with the pole surface of the iron core is bent into an inclined shape towards one side far away from the iron core.
Furthermore, the movable spring part is designed into a structure capable of resisting short-circuit current and comprises a movable spring lead-out sheet, a rigid reed and a flexible connecting piece, the movable spring lead-out sheet is inserted in the base, a lead-out pin of the movable spring part is formed at the bottom of the movable spring lead-out sheet, the top of the rigid reed is rotatably connected with the top of the movable spring lead-out sheet, the rigid reed can rotate towards the direction far away from or close to the movable spring lead-out sheet, and the flexible connecting piece is connected between the top of the rigid reed and the top of the movable spring lead-out sheet; one side of the bottom of the rigid reed, which is back to the leading-out piece of the movable reed, is provided with a movable contact; the pushing clamp is provided with a plurality of clamping grooves at intervals along the length direction, the clamping grooves correspond to the at least three groups of movable spring parts one to one, and the rigid reeds of the movable spring parts are clamped in the corresponding clamping grooves respectively.
Furthermore, the movable spring part also comprises a counter force reed, the counter force reed is positioned between the movable spring lead-out piece and the rigid reed, the bottom of the counter force reed is fixedly connected with the rigid reed, a preset space is arranged between the top of the counter force reed and the rigid reed, and the top of the counter force reed is clamped in the clamping groove.
Furthermore, a limit piece is arranged at one end, facing the armature, of the push card, the limit piece is matched with a first partition wall arranged on the base to limit the push stroke of the push card, and the first partition wall is positioned between the armature and a contact unit adjacent to the armature; and one end of the push card, which is far away from the armature, is matched with a movable spring lead-out sheet which is far away from the armature, so that the reset stroke of the push card is limited.
Furthermore, the device also comprises an auxiliary movable spring provided with an auxiliary movable contact and an auxiliary static spring provided with an auxiliary static contact, which are respectively inserted in the base and positioned at one side of the armature; the pushing card or the armature is provided with a driving part which is matched with the auxiliary movable spring to drive the auxiliary movable spring to act; the action state of the auxiliary movable spring plate is opposite to that of the movable spring part.
Furthermore, a restoring reed is inserted between the yoke and the base, limits the armature and provides the armature for resetting; the coil rack is positioned in the length direction of the base, the at least three groups of contact units are distributed along the length direction of the base, the movable spring parts of the contact units are vertical respectively and are distributed along the width direction of the base with the coil rack, the push clamp is positioned in the length direction of the base, and the push clamp is positioned at the upper limit and the lower limit by a second partition wall arranged between the adjacent contact units by the base.
Compared with the prior art, the utility model discloses following beneficial effect has:
1. because the utility model also comprises at least three groups of contact units which are distributed in parallel, each group of contact units respectively comprises a movable spring part and a static spring part, and the movable spring part and the static spring part are respectively arranged on the base and are correspondingly matched; armature is connected with the movable spring part of each contact unit through pushing away the card to order about each movable spring part and move, make the utility model discloses not only be applicable to the three-phase alternating current, still have the function of monostable, and can utilize the promotion card to realize forcing the direction, thereby improve the utility model discloses a security performance.
2. Because the magnetic circuit part each contact unit is located respectively the different cavities of base make the utility model discloses a between magnetic circuit part and the contact unit, creepage distance, air gap are great between the adjacent contact unit to further improved the utility model discloses a security performance.
3. The pin-out of movable spring part with the pin-out of quiet spring part is located the both ends department that the base is relative can avoid the pin-out of movable spring part with the pin-out of quiet spring part is located and leads to the space comparatively crowded and inconvenient wiring and the short circuit phenomenon appears easily with one side to further improve the utility model discloses a security performance.
4. Promote card one end and be equipped with insulating connecting piece, this connecting piece is equipped with the slot, the one end cartridge that iron core polar surface was kept away from to armature is wrapped in this slot to not only realized promoting the card fixed with being connected of armature, can also utilize the connecting piece to increase armature and contact element's creepage distance, thereby further improves the utility model discloses a security performance.
5. Armature with iron core pole face complex part is towards keeping away from one side of iron core is bent into the slope form, makes the turned angle of armature bigger to the stroke that makes the propelling card is bigger, therefore, moves spring part and quiet spring part and is bigger in the contact clearance of off-state, thereby can improve the utility model discloses security performance at the off-state.
6. But the structure of dynamic spring part establishment to anti short-circuit current makes the utility model discloses still possess anti short-circuit's function.
7. The utility model discloses still including the supplementary movable contact spring that is equipped with supplementary movable contact and the supplementary stationary contact spring that is equipped with supplementary stationary contact, make the utility model discloses still possess the function of control contact unit action state.
The present invention will be described in further detail with reference to the accompanying drawings and examples; however, the present invention is not limited to the embodiment, and the present invention is applicable to an electromagnetic relay for three-phase ac power.
Drawings
Fig. 1 is a schematic perspective view (embodying the front side, without the housing) of the present invention;
fig. 2 is a schematic perspective view of the present invention (with the back side shown and without the housing);
FIG. 3 is a front view of the present invention (without the housing);
fig. 4 is a top view of the present invention (without the housing);
fig. 5 is a right side view of the present invention (without the housing);
fig. 6 is a schematic structural diagram of the push card of the present invention.
Detailed Description
In an embodiment, please refer to fig. 1-6, the electromagnetic relay for three-phase alternating current according to the present invention includes a base 1, a magnetic circuit portion 2, and a housing (not shown in the figures), wherein the magnetic circuit portion 2 includes a coil frame 21 with an iron core 25 and an enamel wire 24, an armature 23, and a yoke 22 connected to the iron core 25, the coil frame 21 is disposed on the base 1, and the armature 23 is disposed at a knife edge of the yoke 22 and is matched with a pole surface of the iron core 25. The iron core 25 is specifically inserted into the coil frame 21, and two ends of the iron core are exposed, the enameled wire 24 is wound outside the coil frame 21, the yoke 22 is L-shaped, one side of the yoke is fixedly connected (or integrally formed) with one end of the iron core 25 far away from the armature 23, and the other side of the yoke is matched with the side surface of the coil frame 21. The utility model also comprises at least three groups of contact units which are distributed in parallel, each group of contact units respectively comprises a movable spring part 3 and a static spring part 4, and the movable spring part 3 and the static spring part 4 are respectively arranged on the base 1 and are correspondingly matched with each other; the armature 23 is connected to the moving spring portion 3 of each contact unit by means of a push clip 5 to actuate each moving spring portion 3. The coil rack 21 is specifically located in the length direction of the base 1, the at least three sets of contact units are distributed along the length direction of the base 1, the movable spring parts 3 of the contact units are respectively vertical and distributed along the width direction of the base 1 together with the coil rack 21, and the push card 5 is located in the length direction of the base 1. The number of the contact units is specifically four groups, but is not limited thereto. The housing is connected to the base 1 and encloses the magnetic circuit portion 2 and the contact units in its housing cavity.
In this embodiment, the magnetic circuit portion 2 and the contact units are respectively located in different cavities of the base 1. The pin 311 of the movable spring part 3 and the pin 411 of the stationary spring part 4 are located at opposite ends of the base 1. Specifically, the pin 311 of the movable spring part 3 and the pin 411 of the stationary spring part 4 are located at two opposite ends of the base 1 in the width direction, so that the phenomenon that the pin 311 of the movable spring part 3 and the pin 411 of the stationary spring part 4 are located at the same side to cause space congestion, which is inconvenient for wiring and easy to cause short circuit is avoided.
In this embodiment, an insulating connector 51 is integrally formed at an end of the push card 5 facing the armature 23, the connector 51 is provided with a slot 511, and an end of the armature 23 away from the pole face of the iron core 25 is inserted into the slot 511 and is surrounded by the slot 511. Specifically, as shown in fig. 6, the slot 511 is U-shaped with at least one end closed, and two opposite slot walls of the slot are respectively provided with a convex rib 512, the surface of the convex rib 512 is arc-shaped, and one end of the armature 23 away from the iron core 25 is inserted into the slot 511 and then is in transition fit with the convex rib 512, so that the end of the armature 23 away from the iron core 25 is limited to be removed.
In the present embodiment, the armature 23 is substantially in a straight shape, and a portion of the armature 23 that is engaged with the pole face of the iron core 25 is bent to be inclined toward a side away from the iron core 25, as shown in fig. 4. So, make armature 23's turned angle bigger to it is bigger to make the stroke of propelling movement card 5, therefore, moves spring part 3 and quiet spring part 4 and is bigger at the contact clearance of off-state, thereby can improve the utility model discloses security performance at the off-state.
In this embodiment, the movable spring part 3 is configured to resist short-circuit current, and includes a movable spring lead-out piece 31, a movable spring piece, and a rigid spring piece 32, the movable spring lead-out piece 31 is inserted into the base 1, and the bottom of the movable spring lead-out piece forms a lead-out pin 311 of the movable spring part 3, the top of the movable spring piece is connected with the top of the movable spring lead-out piece 31, and a movable contact 33 is disposed on a side of the bottom of the movable spring piece, which is back to the movable spring lead-out piece 31. The movable spring is specifically a rigid spring 32, but is not limited to this, and in other embodiments, the movable spring is a spring with elasticity, and the top of the movable spring is fixedly connected with the top of the movable spring lead-out piece.
The top of the rigid spring plate 32 is rotatably connected with the top of the movable spring leading-out piece 31, so that the rigid spring plate 32 can rotate towards a direction far away from or close to the movable spring leading-out piece 31. Specifically, the top of the rigid reed 32 is connected with the top of the movable spring leading-out piece 31 through a rotating shaft 35, and a flexible connecting piece 36 is further connected between the top of the rigid reed 32 and the top of the movable spring leading-out piece 31; the push card 5 is provided with a plurality of slots 54 at intervals along the length direction thereof, the slots 54 correspond to the at least three sets of movable spring parts 3 one by one, and the movable spring pieces (i.e. the rigid spring pieces 32) of the movable spring parts 3 are respectively clamped in the corresponding slots 54.
In this embodiment, the movable spring part 3 further includes a reaction force reed 34, the reaction force reed 34 is located between the movable spring lead-out piece 31 and the rigid reed 32, the bottom of the reaction force reed 34 is fixedly connected to the rigid reed 32, a preset distance is provided between the top of the reaction force reed 34 and the rigid reed 32, and the top of the reaction force reed 34 is clamped in the clamping groove 54. In this way, when the card 5 is pushed, the rigid spring piece 32 is pushed by the push reaction spring piece 34 to move in the direction of the stationary spring part 4, thereby generating an overtravel. In this embodiment, the bottom of the rigid spring 32 is bent to be inclined toward the side away from the static spring portion 4, which is beneficial to further increase the contact gap between the movable spring portion 3 and the static spring portion 4 in the off state. The movable spring leading-out pieces 31 of the movable spring parts 3 are respectively provided with a yielding groove for yielding the push card 5. One end of the push card 5 facing the armature 23 is provided with a limiting member 53, the limiting member 53 is matched with a first partition wall 11 arranged on the base 1 to limit the push stroke of the push card 5, and the first partition wall 11 is located between the armature 23 and a contact unit adjacent to the armature 23. One end of the push card 5, which is far away from the armature 23, is matched with a movable spring lead-out piece 31, which is far away from the armature 23, so that the reset stroke of the push card 5 is limited. The pushing stroke refers to a stroke generated by driving the pushing card 5 to move when the armature 23 is attracted with the pole face of the iron core 25, and the resetting stroke refers to a stroke generated by driving the pushing card 5 to move when the armature 23 is separated from the pole face of the iron core 25. When the limiting piece 53 contacts with the first partition wall 11, the pushing card 5 pushes to the limit position, and when one end of the pushing card 5 far away from the armature 23 contacts with the moving spring lead-out piece 31 farthest away from the armature 23, the pushing card 5 resets to the limit position. The pushing card 5 is limited up and down by a second partition wall 12 arranged between adjacent contact units on the base 1, specifically, the second partition wall 12 is broken into an upper part and a lower part at the position of the pushing card 5, and is used for avoiding and limiting the pushing card 5 up and down, and meanwhile, the part below the second partition wall 12 can support the pushing card 5.
In this embodiment, the present invention further comprises an auxiliary movable spring 6 with an auxiliary movable contact and an auxiliary stationary spring 7 with an auxiliary stationary contact, which are respectively inserted into the base 1 and located at one side of the armature 23; the push card 5 is provided with a driving part 52, and the driving part 52 is matched with the auxiliary movable spring 6 to drive the auxiliary movable spring 6 to act; the action state of the auxiliary movable spring 6 is opposite to that of the movable spring portion 3. That is, when the movable spring part 3 moves in the attracting direction, the auxiliary movable spring 6 moves in the releasing direction, and when the movable spring part 3 moves in the releasing direction, the auxiliary movable spring 6 moves in the attracting direction. The driving part 52 is specifically located at the bottom of the connecting piece 51. In other embodiments, the drive portion is provided to the armature.
In this embodiment, a restoring spring 8 is inserted between the yoke 22 and the base 1, and the restoring spring 8 limits the armature 23 and provides the armature 23 with restoration. Specifically, a through groove 231 is formed between the pivot fulcrum of the armature 23 and the end far away from the iron core 25, one of the folded edges of the restoring spring 8 extends in the direction away from the push card 5, and the folded edge passes through the through groove 231 and is overlapped on the surface of the armature 23, which faces away from the iron core 25 (i.e., the outer side surface of the armature 23), so as to further limit the position of the armature 23 and prevent the armature 23 from falling off. The other folded edge of the restoring spring 8 extends towards the direction close to the pushing card 5, passes through the through groove 231 of the armature 23 and then is lapped on the surface of the armature 23 opposite to the iron core 25 (namely the outer side surface of the armature 23) to provide the resetting of the armature 23.
In this embodiment, the static spring part 4 includes a static spring 41 and a static contact 42, the static spring 41 is laterally inserted into the bottom of the base 1 from the width direction of the base 1, the static contact 42 is disposed at one end facing the movable spring part 3, and the end far away from the movable spring part 3 extends below the base 1 to form a lead-out pin 411 of the static spring part 4. The movable spring leading-out piece 31 is inserted into the base 1 from the width direction side of the base 1.
The utility model discloses a can be applied to three-phase alternating current's electromagnetic relay can be applied to three-phase four-wire system return circuit, and its every group contact element can reach 40A's current-carrying capacity, can resist 3 kA's short-circuit current.
When the coil (i.e. the enameled wire 24) is excited, the armature 23 rotates around the knife edge of the yoke 22, and is attracted to the pole face of the iron core 25, and at the same time, the pushing card 5 is driven to move along the length direction of the base 1, and the reaction spring 34 and the rigid spring 32 of the movable spring part 3 are driven to move, so that the movable contact 33 is connected with the fixed contact 42. When the movable contact 33 is just contacted with the fixed contact 42, the reaction spring 34 starts to be plastically deformed, and after the armature 23 is completely contacted with the pole surface of the iron core 25, the reaction spring 34 is deformed and finished, and the overtravel is mainly realized by the elastic deformation of the reaction spring 34. The rigid reed 32 is only responsible for conducting and carrying current, and is not responsible for deformation to realize the overtravel function. When the coil (i.e. the enameled wire 24) is de-energized, the armature 23 is reset under the action of the restoring spring 8, and simultaneously drives the pushing card 5 to move in the opposite direction, and drives the counter force spring 34 and the rigid spring 32 of the movable spring part 3 of each movable spring part 3 to move in the opposite direction, so that the movable contact 33 is disconnected from the fixed contact 42. When the movable contact 33 of one group of movable spring parts 3 is stuck with the corresponding fixed contact, the push card 5 cannot reset, so that the movable contact 33 of the other groups of movable spring parts 3 cannot be disconnected with the corresponding fixed contact, and the function of forced guiding is achieved.
The disconnection between the auxiliary moving contact and the auxiliary stationary spring contact is realized by pushing the head of the auxiliary moving spring 6 by the driving part 52 of the pushing card 5, and the connection between the auxiliary moving contact and the auxiliary stationary spring contact is realized by the counter force of the auxiliary moving spring 6. The auxiliary contact portion achieves a higher insulation from the main contact portion (i.e., the contact unit). The auxiliary contact part can monitor the state of the main contact part, and the auxiliary contacts cannot be closed no matter which way of main contacts are stuck, so that the locking function is realized.
When short-circuit current occurs, Hall force can be generated on the surfaces of the movable contact 33 and the fixed contact 42, and the Hall force can cause the movable contact 33 and the fixed contact 42 to be repelled; a lorentz force is generated in the U-shaped structure formed by the movable spring lead-out piece 31, the movable spring piece 32 and the flexible connecting piece 36, and the lorentz force urges the movable contact 33 to move toward the fixed contact 42, thereby restricting the movable contact 33 and the fixed contact 42 from repelling each other.
The above embodiments are only used to further explain the present invention, but the present invention is not limited to the embodiments, and any simple modification, equivalent change and modification made by the technical entity of the present invention to the above embodiments all fall into the protection scope of the present invention.
Claims (10)
1. The electromagnetic relay comprises a base and a magnetic circuit part, wherein the magnetic circuit part comprises a coil rack provided with an iron core and an enameled wire, an armature and a yoke connected with the iron core, the coil rack is horizontally arranged on the base, and the armature is arranged at the knife edge of the yoke and matched with the pole surface of the iron core; the method is characterized in that: the movable spring part and the static spring part are respectively arranged on the base and are correspondingly matched with each other; the armature is connected with the movable spring part of each contact unit through a pushing card so as to drive each movable spring part to act.
2. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: the magnetic circuit part and the contact units are respectively positioned in different cavities of the base.
3. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: the leading-out pins of the movable spring part and the leading-out pins of the static spring part are positioned at two opposite ends of the base.
4. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: one end of the pushing card is provided with an insulating connecting piece, the connecting piece is provided with a slot, and one end of the armature far away from the pole face of the iron core is inserted into the slot and is wrapped by the slot.
5. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: the part of the armature iron matched with the pole surface of the iron core is bent into an inclined shape towards one side far away from the iron core.
6. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: the movable spring part is designed into a structure capable of resisting short-circuit current and comprises a movable spring lead-out sheet, a rigid reed and a flexible connecting piece, the movable spring lead-out sheet is inserted in the base, a lead-out pin of the movable spring part is formed at the bottom of the movable spring lead-out sheet, the top of the rigid reed is rotationally connected with the movable spring lead-out sheet, the rigid reed can rotate towards the direction far away from or close to the movable spring lead-out sheet, and the flexible connecting piece is connected between the top of the rigid reed and the top of the movable spring lead-out sheet; one side of the bottom of the rigid reed, which is back to the leading-out piece of the movable reed, is provided with a movable contact; the pushing clamp is provided with a plurality of clamping grooves at intervals along the length direction, the clamping grooves correspond to the at least three groups of movable spring parts one to one, and the rigid reeds of the movable spring parts are clamped in the corresponding clamping grooves respectively.
7. An electromagnetic relay applicable to three-phase alternating current according to claim 6, characterized in that: the movable spring part also comprises a counter force reed, the counter force reed is positioned between the movable spring lead-out sheet and the rigid reed, the bottom of the counter force reed is fixedly connected with the rigid reed, a preset space is arranged between the top of the counter force reed and the rigid reed, and the top of the counter force reed is clamped in the clamping groove.
8. An electromagnetic relay applicable to three-phase alternating current according to claim 6 or 7, characterized in that: one end of the pushing card facing the armature is provided with a limiting piece, the limiting piece is matched with a first partition wall arranged on the base to limit the pushing stroke of the pushing card, and the first partition wall is positioned between the armature and a contact unit adjacent to the armature; and one end of the push card, which is far away from the armature, is matched with a movable spring lead-out sheet which is far away from the armature, so that the reset stroke of the push card is limited.
9. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: the armature is provided with a movable contact, an auxiliary movable spring provided with an auxiliary movable contact and an auxiliary static spring provided with an auxiliary static contact, wherein the movable contact and the auxiliary static spring are respectively inserted into the base and are positioned on one side of the armature; the pushing card or the armature is provided with a driving part which is matched with the auxiliary movable spring to drive the auxiliary movable spring to act; the action state of the auxiliary movable spring plate is opposite to that of the movable spring part.
10. An electromagnetic relay applicable to three-phase alternating current according to claim 1, characterized in that: a restoring reed is inserted between the yoke and the base, limits the armature and provides the armature for resetting; the coil rack is positioned in the length direction of the base, the at least three groups of contact units are distributed along the length direction of the base, the movable spring parts of the contact units are vertical respectively and are distributed along the width direction of the base with the coil rack, the push clamp is positioned in the length direction of the base, and the push clamp is positioned at the upper limit and the lower limit by a second partition wall arranged between the adjacent contact units by the base.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022017663.8U CN212461530U (en) | 2020-09-15 | 2020-09-15 | Electromagnetic relay capable of being applied to three-phase alternating current |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022017663.8U CN212461530U (en) | 2020-09-15 | 2020-09-15 | Electromagnetic relay capable of being applied to three-phase alternating current |
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| CN212461530U true CN212461530U (en) | 2021-02-02 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262851A1 (en) * | 2021-06-18 | 2022-12-22 | 厦门宏发电力电器有限公司 | Multi-phase electromagnetic relay |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022262851A1 (en) * | 2021-06-18 | 2022-12-22 | 厦门宏发电力电器有限公司 | Multi-phase electromagnetic relay |
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