CN218733207U - Electric leakage protection knapsack, circuit breaker and electric leakage protection system - Google Patents
Electric leakage protection knapsack, circuit breaker and electric leakage protection system Download PDFInfo
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- CN218733207U CN218733207U CN202223015559.0U CN202223015559U CN218733207U CN 218733207 U CN218733207 U CN 218733207U CN 202223015559 U CN202223015559 U CN 202223015559U CN 218733207 U CN218733207 U CN 218733207U
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- circuit breaker
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Abstract
The utility model discloses an earth leakage protection knapsack, circuit breaker and earth leakage protection system. The leakage protection backpack comprises a relay and a leakage protection circuit board, wherein the relay comprises an electromagnetic coil and at least one group of normally open contacts; the two ends of the electromagnetic coil are respectively and electrically connected with the first current input end and the second current input end of the circuit breaker, when the electromagnetic coil is in a power-on state, magnetic force capable of enabling the normally open contact to be attracted is generated, and when the electromagnetic coil is in a power-off state, the magnetic force of the electromagnetic coil on the normally open contact disappears; the normally open contact is electrically connected with the leakage protection circuit board, and the leakage protection circuit board is electrically connected with the load end of the circuit breaker. This earth leakage protection knapsack is behind circuit breaker electric leakage dropout, no matter adopt last inlet wire mode or lower inlet wire mode of connection, and the homoenergetic can realize earth leakage protection action, makes the outage of earth leakage protection circuit board, prevents to burn out the earth leakage protection circuit board because of lead to the heavy current for a long time, has realized the compatibility to last inlet wire mode and lower inlet wire mode of connection.
Description
Technical Field
The utility model relates to an earth leakage protection knapsack technical field especially relates to an earth leakage protection knapsack, circuit breaker and earth leakage protection system.
Background
The leakage breaker is a switch which can automatically act when the leakage current in the circuit exceeds a preset value. The leakage circuit breaker usually adopts last inlet wire wiring, and its inside leakage protection circuit board adopts inlet wire sample power supply mode down to the protection internal circuit board is not burnt out.
When the leakage circuit breaker works normally, the controllable silicon of the leakage protection circuit board is in a cut-off state, the current part flowing through the tripping coil is not enough to enable the coil to generate electromagnetic attraction, the tripping mechanism does not execute tripping action, and the leakage circuit breaker keeps a closing state; when the lower end of the leakage circuit breaker is loaded with the leakage phenomenon, the leakage protection circuit board detects a leakage signal and outputs a conduction signal to the silicon controlled rectifier trigger electrode to conduct the silicon controlled rectifier, the current of a tripping coil connected with the silicon controlled rectifier in series after conduction is increased, and large current generates large electromagnetic force to drive a product tripping mechanism to act so as to open the leakage circuit breaker.
In practical application, because of wiring error of an operator or limited installation space, when part of customers use the leakage circuit breaker, the leakage circuit breaker adopts a lower incoming line wiring mode, when the lower end of the leakage circuit breaker is loaded with a leakage phenomenon, because the main loop is incoming at the lower end, the main loop is not powered off, the voltage of the leakage protection circuit board cannot be cut off, and the leakage protection circuit board and the trip coil are burned out continuously through large current; that is, the conventional earth leakage breaker is only applicable to an upper wiring connection method, and the application range is limited.
Therefore, how to provide an electric leakage circuit breaker which is compatible with an upper incoming line wiring mode and a lower incoming line wiring mode to widen the application range of the electric leakage circuit breaker is a technical problem which needs to be solved by technical personnel in the field at present.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at providing an earth leakage protection knapsack to compatible inlet wire mode and the earth leakage circuit breaker of lower inlet wire mode of connection, widen earth leakage circuit breaker's range of application.
In order to achieve the above object, the present invention provides the following technical solutions:
an electric leakage protection backpack comprises a relay and an electric leakage protection circuit board, wherein the relay comprises an electromagnetic coil and at least one group of normally open contacts;
the electromagnetic coil is in a power-off state, the magnetic force of the electromagnetic coil to the normally open contact disappears; the normally open contact is electrically connected with the electric leakage protection circuit board, and the electric leakage protection circuit board is electrically connected with the load end of the circuit breaker.
Optionally, in the above-mentioned leakage protection backpack, the first current input terminal and the second current input terminal are respectively a first current input terminal and a second current input terminal, the leakage protection backpack further includes a terminal block, a first hole site for installing the first current input terminal and a second hole site for installing the second current input terminal are provided on the terminal block, and an installation cavity for accommodating the relay and the leakage protection circuit board.
Optionally, in the above-mentioned leakage protection backpack, a cover plate is detachably connected to the terminal block, so as to press the relay and the circuit board in the mounting cavity.
Optionally, in the above leakage protection backpack, a cover plate buckle is disposed on the terminal base, and the cover plate buckle is used for clamping the cover plate.
Optionally, in the above-mentioned leakage protection backpack, the terminal block is provided with a terminal buckle, and the circuit breaker is provided with a clamping structure matched with the terminal buckle.
Optionally, in the above-mentioned earth leakage protection backpack, the number of the normally open contacts is one group.
Optionally, in the above-mentioned earth leakage protection backpack, the number of the normally open contacts is two.
Optionally, in the above-mentioned earth leakage protection backpack, the number of the normally open contacts is three.
A circuit breaker comprising an earth leakage protection backpack as described above.
An earth leakage protection system comprising an earth leakage protection backpack as described above.
When the leakage protection backpack is used, if the circuit breaker adopts an upper feeding line for wiring, because two ends of the electromagnetic coil are respectively electrically connected with the first current input end and the second current input end of the circuit breaker, therefore, the first current input end and the second current input end of the circuit breaker are electrified, when the electromagnetic coil is in an electrified state, the electromagnetic coil generates magnetic force for attracting the normally open contact, the normally open contact is closed, after the circuit breaker is switched on, a closed electric loop is formed, the load end of the circuit breaker is electrified, because the leakage protection circuit board is electrically connected with the load end of the circuit breaker, the leakage protection circuit board can take electricity at the load end of the circuit breaker, a leakage signal is detected after the leakage protection circuit board is electrified, when the leakage signal is detected by the leakage protection circuit board, the circuit breaker tripping mechanism acts to open the circuit breaker, at the moment, the load end of the circuit breaker has no voltage, the leakage protection circuit board is powered off, and the leakage protection circuit board is not burnt; if the circuit breaker adopts a lower incoming line connection mode, namely a main circuit is electrically connected with a load end of the circuit breaker, the load end of the circuit breaker has electricity, a current input end of the circuit breaker is electrically connected with an external load, after the circuit breaker is switched on, a first current input end and a second current input end of the circuit breaker are electrified, and two ends of an electromagnetic coil are respectively and electrically connected with the first current input end and the second current input end of the circuit breaker, so that when the electromagnetic coil is in an electrified state, the electromagnetic coil generates magnetic force for attracting a normally open contact, the normally open contact is closed, the leakage protection circuit board is normally electrified to work, a leakage signal is monitored in real time, when the leakage protection circuit board detects the leakage signal, a tripping mechanism of the circuit breaker acts, the circuit breaker is switched off, at the moment, the current input end of the circuit breaker has no voltage, two ends of the electromagnetic coil are switched off, the electromagnetic coil is in a power-off state, the magnetic force for attracting the normally open contact disappears, the normally open contact of the circuit breaker is disconnected, and the normally open contact of the circuit breaker is electrically connected with the leakage protection circuit board, and the normally open contact is electrically connected with the leakage protection circuit board, so that the leakage protection circuit board is not burnt.
Therefore, the utility model provides an earth leakage protection knapsack is behind circuit breaker electric leakage dropout, no matter adopt last inlet wire mode or lower inlet wire mode of connection, and the action of earth leakage protection can be realized to the homoenergetic, makes the outage of earth leakage protection circuit board, prevents to burn out the earth leakage protection circuit board because of long-time logical heavy current, has realized the compatibility to last inlet wire mode of connection and lower inlet wire mode, has widened the range of application of circuit breaker, has better market perspective.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is an electrical wiring diagram of an earth leakage protection backpack and a circuit breaker according to an embodiment of the present invention;
fig. 2 is a schematic view of an assembly structure of a relay and a leakage protection circuit board according to an embodiment of the present invention;
fig. 3 is an exploded schematic view of an earth leakage protection backpack according to an embodiment of the present invention;
fig. 4 is a schematic view of an assembly structure of the earth leakage protection backpack and the circuit breaker according to an embodiment of the present invention.
Wherein, 10 is the earth leakage protection knapsack, 100 is the relay, 101 is first coil link end, 102 is the second coil link end, 103 is first A looks contact, 104 is second A looks contact, 105 is first B looks contact, 106 is second B looks contact, 107 is first C looks contact, 108 is second C looks contact, 200 is the earth leakage protection circuit board, 201 is circuit board A looks terminal, 202 is circuit board B looks terminal, 203 is circuit board C looks terminal, 300 is the terminal block, 301 is the terminal buckle, 400 is the apron, 401 is the apron buckle, 20 is the circuit breaker, 21 is first current input end, 22 is the second current input end.
Detailed Description
In view of this, the utility model discloses a core lies in providing an earth leakage protection knapsack to the compatible inlet wire mode of going up and the earth leakage circuit breaker of inlet wire mode of connection down widen earth leakage circuit breaker's range of application.
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
As shown in fig. 1 to 4, the embodiment of the present invention discloses an earth leakage protection backpack, which comprises a relay 100 and an earth leakage protection circuit board 200, wherein the relay 100 comprises a first coil connecting end 101, a second coil connecting end 102 and an electromagnetic coil connected between the first coil connecting end 101 and the second coil connecting end 102, and at least one set of normally open contacts.
In the embodiment of the present invention, the first coil connecting end 101 of the electromagnetic coil is electrically connected to the first current input end of the circuit breaker, the second coil connecting end 102 of the electromagnetic coil is electrically connected to the second current input end of the circuit breaker, when the electromagnetic coil is in the power-on state, a magnetic force capable of attracting the normally open contact is generated, and when the electromagnetic coil is in the power-off state, the magnetic force of the electromagnetic coil to the normally open contact disappears; the normally open contact is electrically connected to the earth leakage protection circuit board 200, and the earth leakage protection circuit board 200 is electrically connected to the load terminal of the circuit breaker.
When the leakage protection backpack is used, if the circuit breaker 20 adopts an upper feeding line for wiring, because the first coil connecting end 101 of the relay 100 is electrically connected with the first current input end 21 of the circuit breaker 20, and the second coil connecting end 102 of the relay 100 is electrically connected with the second current input end 22 of the circuit breaker 20, therefore, after the current input end of the circuit breaker 20 is electrified, the first coil connecting end 101 and the second coil connecting end 102 are electrified, so that the electromagnetic coil is in an electrified state, the electromagnetic coil generates magnetic force for attracting the normally open contact, so that the normally open contact is closed, after the circuit breaker 20 is switched on, a closed electric loop is formed, the load end of the circuit breaker 20 is electrified, because the leakage protection circuit board 200 is electrically connected with the load end of the circuit breaker 20, therefore, the leakage protection circuit board 200 can get electricity at the load end of the circuit breaker 20, detect a leakage signal after the leakage protection circuit board 200 is electrified, after the leakage protection circuit board 200 detects the signal, the circuit breaker 20 trips to open the circuit of the circuit breaker 20, at this time, the load end of the circuit breaker 20 has no voltage, the leakage protection circuit board 200 is disconnected, and the leakage protection circuit board 200 is not burnt; if the circuit breaker 20 adopts a lower incoming line connection, that is, the main circuit is electrically connected with the load end of the circuit breaker 20, the load end of the circuit breaker 20 is electrified, the current input end of the circuit breaker 20 is electrically connected with an external load, after the circuit breaker 20 is switched on, the first current input end and the second current input end of the circuit breaker 20 are electrified, because the first coil connecting end 101 of the relay 100 is electrically connected with the first current input end 21 of the circuit breaker 20, the second coil connecting end 102 of the relay 100 is electrically connected with the second current input end 22 of the circuit breaker 20, therefore, the first coil connecting end 101 and the second coil connecting end 102 are electrified, so that the electromagnetic coil is in an electrified state, the electromagnetic coil generates a magnetic force for attracting the normally open contact to close the normally open contact, because the load end of the circuit breaker 20 is electrified, the leakage protection circuit board 200 is electrically connected with the load end of the circuit breaker 20, therefore, the leakage protection circuit board 200 normally works in an electrified state, a real-time monitoring signal, when the leakage protection circuit board 200 detects the leakage signal, the circuit breaker 20 trips to open the circuit breaker 20, at this time, the current input end of the normally open circuit breaker 20 is not in a voltage, the normally open circuit board is separated from the leakage protection circuit board, and the leakage protection circuit breaker 20 is not destroyed, therefore, the leakage protection circuit board is electrically connected with the leakage protection circuit board 200.
Therefore, the embodiment of the utility model provides a leakage protection knapsack is behind circuit breaker 20 electric leakage dropout, no matter adopt last inlet wire mode or lower inlet wire mode, the action of earth leakage protection all can be realized, make leakage protection circuit board 200 outage, prevent to burn out leakage protection circuit board 200 because of lead to the heavy current for a long time, realized the compatibility to last inlet wire mode and lower inlet wire mode, widened circuit breaker 20's range of application, better market perspective has.
Further, first current input end and second current input end are first current input terminal and second current input terminal respectively, the earth leakage protection knapsack still includes the terminal block, be equipped with the first hole site that is used for installing first current input terminal and the second hole site that is used for installing the second current input terminal on the terminal block 300, and be used for holding relay 100 and earth leakage protection circuit board 200's installation cavity, in order to realize through first current input terminal and second current input terminal with the electric connection in electric current backbone way, perhaps realize being connected with external load's electricity.
It should be understood that, the terminal block 300 may only be installed with the first current input terminal and the second current input terminal, that is, only the first hole site and the second hole site are installed on the terminal block 300, and the existing terminal block 300 with six wiring hole sites may also be used, any two of the six wiring hole sites are the first current input terminal and the second current input terminal, as long as the design mode can satisfy the use requirement, all belong to the protection scope of the present invention; optionally, the embodiment of the utility model provides a terminal block 300 adopts current terminal block 300, and this terminal block 300 has six wiring hole sites, and the terminal electricity on two arbitrary wiring hole sites on relay 100's first coil link 101 and second coil link 102 and the circuit breaker 20 is connected to get the electricity, make the solenoid of connecting between first coil link 101 and second coil link 102 produce magnetic force, close with adsorbing the normally open contact, form closed electric loop.
In addition, the terminal block 300 is detachably connected with a cover plate 400 to compress the relay 100 and the leakage protection circuit board 200 in the installation cavity, so as to compress and fix the relay 100 and the leakage protection circuit board 200.
The cover plate 400 and the terminal base 300 may be connected by screws or fasteners, and any detachable connection is within the scope of the present invention; optionally, the embodiment of the utility model provides a be equipped with apron buckle 401 on the terminal block 300, apron buckle 401 is used for joint apron 400, realizes the connection dismantled between apron 400 and the terminal block 300.
Above-mentioned terminal base 300 is last to be equipped with terminal buckle 301, be equipped with on circuit breaker 20 with terminal buckle 301 complex joint structure to through the joint cooperation of terminal buckle 301 and joint structure, realize this earth leakage protection knapsack 10 and circuit breaker 20's assembly.
The number of normally open contacts in the relay 100 provided by the present invention may be one, two or three, that is, the leakage protection backpack 10 may be suitable for a single-phase circuit breaker, a two-phase circuit breaker or a three-phase circuit breaker; optionally, in an embodiment of the present invention, the circuit breaker 20 is a three-phase circuit breaker, the number of normally open contacts is three groups, the first group of normally open contacts includes the first a phase contact 103 and the second a phase contact 104, the second group of normally open contacts includes the first B phase contact 105 and the second B phase contact 106, the third group of normally open contacts includes the first C phase contact 107 and the second C phase contact 108, the first a phase contact 103, the first B phase contact 105 and the first C phase contact 107 are respectively used for being electrically connected with the circuit board a phase terminal 201, the circuit board B phase terminal 202 and the circuit board C phase terminal 203, the circuit board a phase terminal 201, the circuit board B phase terminal 202 and the circuit board C phase terminal 203 are electrically connected with the a phase terminal, the B phase terminal and the C phase terminal of the load terminal, so that the leakage protection circuit board 200 takes electricity at the load terminal.
Furthermore, the utility model also discloses a circuit breaker and earth leakage protection system, include as above earth leakage protection knapsack 10, consequently had all technological effects of above-mentioned earth leakage protection knapsack 10 concurrently, this text is no longer repeated here one by one.
The terms "first" and "second," and the like in the description and claims of the present invention and the above-described drawings are used for distinguishing between different objects and not for describing a particular order. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions. For example, a process, method, system, article, or apparatus that comprises a list of steps or elements is not set forth for a listed step or element but may include steps or elements not listed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An electric leakage protection backpack is characterized by comprising a relay and an electric leakage protection circuit board, wherein the relay comprises an electromagnetic coil and at least one group of normally open contacts;
the electromagnetic coil is in a power-off state, the magnetic force of the electromagnetic coil to the normally open contact disappears; the normally open contact is electrically connected with the electric leakage protection circuit board, and the electric leakage protection circuit board is electrically connected with the load end of the circuit breaker.
2. The earth leakage protection backpack of claim 1, wherein the first current input terminal and the second current input terminal are a first current input terminal and a second current input terminal, respectively, the earth leakage protection backpack further comprises a terminal base, and the terminal base is provided with a first hole site for mounting the first current input terminal and a second hole site for mounting the second current input terminal, and a mounting cavity for accommodating the relay and the earth leakage protection circuit board.
3. A residual current protective backpack according to claim 2, wherein a cover plate is detachably connected to the terminal base to press the relay and the circuit board in the mounting cavity.
4. A leakage protection backpack according to claim 3, wherein the terminal base is provided with a cover plate buckle for clamping the cover plate.
5. A leakage protection backpack according to claim 4, wherein the terminal block is provided with a terminal buckle, and the circuit breaker is provided with a clamping structure matched with the terminal buckle.
6. A leakage protection backpack according to any of claims 1 to 5, wherein the number of said normally open contacts is one set.
7. A leakage protection backpack according to any of claims 1 to 5, wherein the number of said normally open contacts is two.
8. A leakage protection backpack according to any one of claims 1 to 5, wherein the number of said normally open contacts is three.
9. A circuit breaker comprising a residual current device as claimed in any one of claims 1 to 8.
10. An earth leakage protection system comprising an earth leakage protection backpack according to any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015559.0U CN218733207U (en) | 2022-11-11 | 2022-11-11 | Electric leakage protection knapsack, circuit breaker and electric leakage protection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223015559.0U CN218733207U (en) | 2022-11-11 | 2022-11-11 | Electric leakage protection knapsack, circuit breaker and electric leakage protection system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218733207U true CN218733207U (en) | 2023-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223015559.0U Active CN218733207U (en) | 2022-11-11 | 2022-11-11 | Electric leakage protection knapsack, circuit breaker and electric leakage protection system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218733207U (en) |
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2022
- 2022-11-11 CN CN202223015559.0U patent/CN218733207U/en active Active
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