CN108400040B - Main and standby power supply switching device with time delay protection - Google Patents
Main and standby power supply switching device with time delay protection Download PDFInfo
- Publication number
- CN108400040B CN108400040B CN201810430739.4A CN201810430739A CN108400040B CN 108400040 B CN108400040 B CN 108400040B CN 201810430739 A CN201810430739 A CN 201810430739A CN 108400040 B CN108400040 B CN 108400040B
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- power supply
- protection mechanism
- contact
- moving contact
- main
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- 238000013016 damping Methods 0.000 claims description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 4
- 230000006835 compression Effects 0.000 claims description 3
- 238000007906 compression Methods 0.000 claims description 3
- 230000003111 delayed effect Effects 0.000 abstract description 3
- 230000003068 static effect Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Classifications
-
- 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
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H7/00—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts
- H01H7/08—Devices for introducing a predetermined time delay between the initiation of the switching operation and the opening or closing of the contacts with timing by mechanical speed-control devices
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Breakers (AREA)
- Driving Mechanisms And Operating Circuits Of Arc-Extinguishing High-Tension Switches (AREA)
Abstract
The invention discloses a main and standby power supply switching device with delay protection, which comprises a contactor, an overload protection mechanism and a delay protection mechanism. When the main power supply is electrified, the contactor armature is attracted to drive the movable contact to be communicated with the main power supply contact, and the main power supply supplies power. When the main power supply is powered off, the contactor coil is powered off, the contactor armature is disconnected under the action of spring force, and the movable contact is driven to be connected with the standby power supply contact, so that the standby power supply supplies power. When the main power supply is restored again, in the beginning stage of power supply restoration, larger voltage fluctuation possibly occurs due to unstable voltage, equipment, particularly some precious and precise equipment, is damaged, and at the moment, the power supply is turned on in a delayed manner by the action of a delay protection mechanism, so that the equipment is protected from being damaged. When short circuit, overcurrent and overload occur, the overload protection mechanism disconnects the main or standby power supply to protect equipment and ensure that no accident occurs.
Description
Technical Field
The invention relates to the field of electrical products, in particular to a main and standby power supply switching device with overload and delay protection.
Background
In some industries, places and departments, power failure is not allowed, and two paths of power supplies are generally arranged, so that 24 hours of uninterrupted power supply all day are required. When the primary power source fails, it must be immediately switched to the backup power source to ensure uninterrupted power supply. The switching of the main power supply and the standby power supply is realized by a power supply switching device. The current power switching device mainly comprises an electronic type and a mechanical type, but has no short circuit and overload protection. When the main power supply is restored, the power supply is switched to the main power supply again, and the equipment is damaged because the power supply voltage of the main power supply is unstable just after restoration.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to develop and design a power supply switching device with delay protection, realize automatic switching of a main power supply and a standby power supply, and solve the problem of unstable voltage when power supply is just restored to protect equipment.
In order to achieve the above purpose, the invention adopts the following technical scheme.
A primary and backup power switching device with delay protection, comprising: the contactor comprises a first armature, an electromagnet, a first spring, a first fixed contact, a second fixed contact and a moving contact, wherein the first fixed contact is connected with a main power supply, the second fixed contact is connected with a standby power supply, the moving contact is connected with a user power supply end, the moving contact is connected with the first armature and contacts with the first fixed contact or the second fixed contact along with the back-and-forth movement of the first armature, the electromagnet is connected with the main power supply, and the electromagnet and the first spring provide back-and-forth movement acting force for the first armature; the delay protection mechanism is connected with the moving contact and provides damping time for the contact of the moving contact and the first fixed contact.
As a further explanation of the scheme, one end of the moving contact is rotatably installed, and the other end of the moving contact is contacted with the first fixed contact or the second fixed contact through swinging.
As a further explanation of the scheme, a first push rod connected with the first armature is arranged on the moving contact, and the first armature drives the first push rod to move back and forth when moving back and forth, so that the other end of the moving contact is driven to swing.
As a further explanation of the above solution, the delay protection mechanism is an air bag type damper, and includes: the piston, piston rod and second spring, the second spring cup joints on the piston rod, provides a supplementary resistance for the compression of piston rod.
As a further illustration of the above, the piston rod is connected to the first push rod.
As a further illustration of the above, the electromagnet is composed of a first coil and a core.
As a further explanation of the above scheme, the moving contact is connected with an overload protection mechanism, and the overload protection mechanism consists of a main power supply overload protection mechanism and a standby power supply overload protection mechanism; when the equipment is short-circuited, overcurrent and overload, the overload protection mechanism cuts off the main power supply or the standby power supply.
As a further explanation of the above solution, the main power supply overload protection mechanism includes: the second coil is connected into a main power supply in series, and the ejector rod is connected with the second armature and the third spring and moves back and forth under the drive of the second armature and the third spring; the ejector rod is connected with the moving contact.
As a further explanation of the scheme, the movable contact is provided with a second push rod corresponding to the push rod, and the second push rod is pushed to move when the push rod moves back and forth.
As a further explanation of the above scheme, a locking switch is provided corresponding to the main power supply overload protection mechanism; when overload occurs, the overload protection mechanism pushes the moving contact to be separated from the first fixed contact and suspended, and at the moment, the locking switch acts to lock the moving contact in a suspending space; when the overload fault is eliminated, the locking switch is pressed down, and the moving contact can move under the action of the third spring to restore power supply.
The beneficial effects of the invention are as follows:
1. when the main power supply is electrified, the contactor armature is attracted to drive the movable contact to be communicated with the main power supply contact, and the main power supply supplies power. When the main power supply is powered off, the contactor coil is powered off, the contactor armature is disconnected under the action of spring force, and the movable contact is driven to be connected with the standby power supply contact, so that the standby power supply supplies power. When the main power supply is restored again, in the beginning stage of power supply restoration, larger voltage fluctuation possibly occurs due to unstable voltage, equipment, particularly some precious and precise equipment, is damaged, and at the moment, the power supply is turned on in a delayed manner by the action of a delay protection mechanism, so that the equipment is protected from being damaged.
2. The overload protection mechanism is used for driving the movable contact of the contactor, and when short circuit, overcurrent, overload and the like occur in the running process of equipment, the overload protection mechanism cuts off the main power supply or the standby power supply so as to protect the equipment and ensure that no accident occurs.
3. Through setting up locking switch on overload protection mechanism, when overload protection, lock the position of moving contact, when overload trouble is got rid of, unlock the position of moving contact, the security is good.
Drawings
Fig. 1 is a schematic diagram of a main and standby power switching device according to the present invention.
Reference numerals illustrate:
1: contactor, 2: delay protection mechanism, 3: first push rod, 4: overload protection mechanism, 5: and a second push rod.
1-1: First armature, 1-2: iron core, 1-3: first coil, 1-4: first spring, 1-5: first static contact, 1-6: second static contact, 1-7: and a moving contact.
2-1: Piston, 2-2: piston rod, 2-3: and a second spring.
4-1: Second coil, 4-2: second armature, 4-3: ejector rod, 4-4: third spring, 4-5: and locking the switch.
Detailed Description
In the description of the present invention, it should be noted that, for the azimuth words such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., the azimuth and positional relationships are based on the azimuth or positional relationships shown in the drawings, it is merely for convenience of describing the present invention and simplifying the description, and it is not to be construed as limiting the specific scope of protection of the present invention that the device or element referred to must have a specific azimuth configuration and operation.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features. Thus, the definition of "a first", "a second" feature may explicitly or implicitly include one or more of such features, and in the description of the invention, "at least" means one or more, unless clearly specifically defined otherwise.
In the present invention, unless explicitly stated and limited otherwise, the terms "assembled," "connected," and "connected" are to be construed broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; or may be a mechanical connection; can be directly connected or connected through an intermediate medium, and can be communicated with the inside of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless specified and limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "below," and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply representing the first feature as having a higher level than the second feature. The first feature being "above," "below," and "beneath" the second feature includes the first feature being directly below or obliquely below the second feature, or simply indicating that the first feature is level below the second feature.
The following description of the specific embodiments of the present invention is further provided with reference to the accompanying drawings, so that the technical scheme and the beneficial effects of the present invention are more clear and definite. The embodiments described below are exemplary by referring to the drawings for the purpose of illustrating the invention and are not to be construed as limiting the invention.
As shown in fig. 1, a power supply switching device with delay protection comprises a contactor 1 and a delay protection mechanism 2, wherein the contactor 1 comprises a first armature 1-1, an iron core 1-2, a first coil 1-3, a first spring 1-4, a first fixed contact 1-5, a second fixed contact 1-6 and a moving contact 1-7, the first fixed contact 1-5 is connected with a main power supply, the second fixed contact 1-6 is connected with a standby power supply, the moving contact 1-7 is connected with a user power supply end, the moving contact 1-7 is connected with the first armature 1-1 and is contacted with the first fixed contact 1-5 or the second fixed contact 1-6 along with the back and forth movement of the first armature 1-1, the iron core 1-2 and the first coil 1-3 form an electromagnet, the first coil 1-3 is connected with the main power supply, and the electromagnet and the first spring 1-4 provide a moving acting force for the first armature 1-1. The delay protection mechanism 2 is connected with the moving contact 1-7, and provides a damping time for the contact of the moving contact 1-7 and the first fixed contact 1-5.
The working principle is as follows: when the main power supply is electrified, the first coil 1-3 is electrified, and the first armature 1-1 is attracted by the electromagnet to move downwards, so that the moving contact 1-7 is driven to move downwards; under the action of the delay protection mechanism 2, the moving contact 1-7 slowly moves downwards to be in contact with the first fixed contact 1-5; at this time, the main power supply is connected to the user power supply through the first fixed contact 1-5 and the moving contact 1-7, and is powered by the main power supply. When the main power supply is powered off, the first coil 1-3 is powered off, the first armature 1-1 moves upwards under the action of the first spring 1-4, and then the moving contact 1-7 is driven to move upwards, and the moving contact 1-7 is contacted with the second fixed contact 1-6; at this time, the standby power supply is connected to the user power supply through the second fixed contact 1-6 and the movable contact 1-7, and is supplied with power by the standby power supply; when the main power supply is restored, the contactor is switched to the main power supply again to supply power; the function of the delay protection mechanism 2 is that when the main power supply is powered off and the power supply is restored again, the power supply is unstable due to various factors when the power supply is just restored, and the voltage fluctuates, so that equipment, particularly some valuable equipment, is damaged, therefore, the delay protection mechanism 2 is designed, when the main power supply is restored, the delay protection mechanism 2 provides certain resistance, after a certain time of the moving contact 1-7 is delayed, the first fixed contact 1-5 is connected, the main power supply is connected, and the voltage fluctuation stage when the main power supply just restores the power supply is eliminated, so that the function of protecting user equipment is achieved.
In this embodiment, it is preferable that one end of the moving contact 1-7 is rotatably installed, and the other end of the moving contact 1-7 contacts the first fixed contact 1-5 or the second fixed contact 1-6 under the action of the electromagnet and the first spring 1-4.
Preferably, the delay protection mechanism 2 is an airbag type damper, comprising: the piston 2-1, the piston rod 2-2 and the second spring 2-3, the second spring 2-3 is sleeved on the piston rod 2-2, and a supplementary resistance is provided for compression of the piston rod 2-2. The embodiment adopts the air bag type damper to provide damping, has simple structure and good damping delay effect.
Preferably, a first push rod 3 is installed on the moving contact 1-7, the first armature 1-1 and the piston rod 2-2 are corresponding to the first push rod 3, and when the first armature 1-1 and the piston rod 2-2 move, the first push rod 3 is pushed to move, so that the other end of the moving contact 1-7 is driven to swing.
Further, the moving contact 1-7 is also connected with an overload protection mechanism 4, and the overload protection mechanism 4 consists of a main power supply overload protection mechanism and a standby power supply overload protection mechanism.
The main power supply overload protection mechanism comprises: the device comprises a second coil 4-1, a second armature 4-2, a push rod 4-3 and a third spring 4-4, wherein the second coil 4-1 is connected in series into a main power supply, and the push rod 4-3 is connected with the second armature and the third spring 4-4 and moves back and forth under the drive of the second armature and the third spring 4-4. And a second push rod 5 corresponding to the push rod 4-3 is arranged on the moving contact 1-7. When the main power supply passes through, if the user equipment is short-circuited, over-current, overloaded and the like, the second coil 4-1 generates electromagnetic force to attract the second armature 4-2, so as to drive the ejector rod 4-3 to move upwards, push the moving contact 1-7 to a suspension position A (not contacted with the first fixed contact or the second fixed contact), and cut off the main power supply, thereby protecting the user equipment.
Further, a locking switch 4-5 is arranged corresponding to the main power supply overload protection mechanism. When overload occurs, the overload protection mechanism 4 pushes the moving contact 1-7 to be separated from the corresponding static contact to be suspended, at the moment, the locking switch 4-5 acts to lock the moving contact 1-7 in a suspending space, and the safety is good. After the overload fault is removed, the locking switch 4-5 is pressed down, and the movable contact 1-7 can move under the action of the third spring 4-4, so that the power supply can be restored.
The structure principle of the overload protection mechanism of the standby power supply is similar to that of the overload protection mechanism of the main power supply, and only the corresponding coil can be connected to the standby power supply, so that the redundant description is omitted.
The embodiment provides a main and standby power supply switching device with delay protection, adopts the contactor to realize main and standby power supply automatic switch-over to combine delay protection mechanism to solve the unstable condition of voltage when just beginning to resume the power supply. When the equipment is short-circuited, overcurrent, overload and the like, the power supply is immediately cut off so as to protect the equipment.
It will be understood by those skilled in the art from the foregoing description of the structure and principles that the present invention is not limited to the specific embodiments described above, but is intended to cover modifications and alternatives falling within the spirit and scope of the invention as defined by the appended claims and their equivalents. The portions of the detailed description that are not presented are all prior art or common general knowledge.
Claims (6)
1. A primary and backup power switching device with delay protection, comprising: the contactor comprises a first armature, an electromagnet, a first spring, a first fixed contact, a second fixed contact and a moving contact, wherein the first fixed contact is connected with a main power supply, the second fixed contact is connected with a standby power supply, the moving contact is connected with a user power supply end, the moving contact is connected with the first armature and contacts with the first fixed contact or the second fixed contact along with the back-and-forth movement of the first armature, the electromagnet is connected with the main power supply, and the electromagnet and the first spring provide back-and-forth movement acting force for the first armature; the delay protection mechanism is connected with the moving contact and provides damping time for the contact of the moving contact and the first fixed contact;
One end of the moving contact is rotatably arranged, and the other end of the moving contact is contacted with the first fixed contact or the second fixed contact through swinging; the movable contact is provided with a first push rod connected with the first armature, and the first armature drives the first push rod to move back and forth when moving back and forth so as to drive the other end of the movable contact to swing; the delay protection mechanism is an airbag type damper, and comprises: the piston, the piston rod and the second spring are sleeved on the piston rod, and a supplementary resistance is provided for compression of the piston rod; the piston rod is connected with the first push rod.
2. The primary and backup power switching device with time delay protection of claim 1 wherein the electromagnet is comprised of a first coil and an iron core.
3. The main and standby power supply switching device with delay protection according to claim 1, wherein an overload protection mechanism is connected to the moving contact, and the overload protection mechanism consists of a main power supply overload protection mechanism and a standby power supply overload protection mechanism; when the equipment is short-circuited, overcurrent and overload, the overload protection mechanism cuts off the main power supply or the standby power supply.
4. A primary and backup power switching apparatus with delay protection as claimed in claim 3, wherein said primary power overload protection mechanism comprises: the second coil is connected into a main power supply in series, and the ejector rod is connected with the second armature and the third spring and moves back and forth under the drive of the second armature and the third spring; the ejector rod is connected with the moving contact.
5. The switching device for main and standby power with delay protection according to claim 4, wherein a second push rod corresponding to the push rod is arranged on the moving contact, and the second push rod is pushed to move when the push rod moves back and forth.
6. The switching device for main and standby power supply with delay protection according to claim 4, wherein a locking switch is provided corresponding to the overload protection mechanism for main power supply; when overload occurs, the overload protection mechanism pushes the moving contact to be separated from the first fixed contact and suspended, and at the moment, the locking switch acts to lock the moving contact in a suspending space; when the overload fault is eliminated, the locking switch is pressed down, and the moving contact can move under the action of the third spring to restore power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430739.4A CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810430739.4A CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
Publications (2)
| Publication Number | Publication Date |
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| CN108400040A CN108400040A (en) | 2018-08-14 |
| CN108400040B true CN108400040B (en) | 2024-05-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201810430739.4A Active CN108400040B (en) | 2018-05-08 | 2018-05-08 | Main and standby power supply switching device with time delay protection |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110994774B (en) * | 2019-11-11 | 2022-03-08 | 广州亚美智造科技有限公司 | Power supply switching circuit |
| CN112631219A (en) * | 2020-12-16 | 2021-04-09 | 国网江苏省电力有限公司徐州供电分公司 | Remote intelligent circuit breaker control system |
| CN112952989A (en) * | 2021-03-10 | 2021-06-11 | 武汉旭正科技有限公司 | Power supply control system |
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|---|---|---|---|---|
| DE19521497A1 (en) * | 1994-06-15 | 1995-12-21 | Hitachi Ltd | Overcurrent protection circuit |
| KR20010068607A (en) * | 2000-01-07 | 2001-07-23 | 이종수 | One driving two switches operating mechanism conversion device for automatic load transfer switch |
| WO2006069957A1 (en) * | 2004-12-23 | 2006-07-06 | Siemens Aktiengesellschaft | Method and device for the secure operation of a switching device |
| CN204067112U (en) * | 2014-09-16 | 2014-12-31 | 浙江欧迪森电气有限公司 | Twin-power switch |
| CN208045357U (en) * | 2018-05-08 | 2018-11-02 | 佛山职业技术学院 | A kind of standby usage power transfer device with delay protection |
-
2018
- 2018-05-08 CN CN201810430739.4A patent/CN108400040B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19521497A1 (en) * | 1994-06-15 | 1995-12-21 | Hitachi Ltd | Overcurrent protection circuit |
| KR20010068607A (en) * | 2000-01-07 | 2001-07-23 | 이종수 | One driving two switches operating mechanism conversion device for automatic load transfer switch |
| WO2006069957A1 (en) * | 2004-12-23 | 2006-07-06 | Siemens Aktiengesellschaft | Method and device for the secure operation of a switching device |
| CN204067112U (en) * | 2014-09-16 | 2014-12-31 | 浙江欧迪森电气有限公司 | Twin-power switch |
| CN208045357U (en) * | 2018-05-08 | 2018-11-02 | 佛山职业技术学院 | A kind of standby usage power transfer device with delay protection |
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| CN108400040A (en) | 2018-08-14 |
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