CN211528655U - SPD counter with ground connection detects - Google Patents
SPD counter with ground connection detects Download PDFInfo
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- CN211528655U CN211528655U CN202020037086.6U CN202020037086U CN211528655U CN 211528655 U CN211528655 U CN 211528655U CN 202020037086 U CN202020037086 U CN 202020037086U CN 211528655 U CN211528655 U CN 211528655U
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- 238000001514 detection method Methods 0.000 claims abstract description 66
- 208000025274 Lightning injury Diseases 0.000 claims abstract description 44
- 230000003287 optical effect Effects 0.000 claims description 13
- 230000000087 stabilizing effect Effects 0.000 claims description 9
- 230000009471 action Effects 0.000 claims description 4
- 230000001012 protector Effects 0.000 description 9
- APTZNLHMIGJTEW-UHFFFAOYSA-N pyraflufen-ethyl Chemical compound C1=C(Cl)C(OCC(=O)OCC)=CC(C=2C(=C(OC(F)F)N(C)N=2)Cl)=C1F APTZNLHMIGJTEW-UHFFFAOYSA-N 0.000 description 6
- 238000010586 diagram Methods 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 230000004044 response Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
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Abstract
The utility model provides a SPD counter with grounding detection, which comprises a current transformer, a grounding wire and a current detection circuit, wherein the current transformer is sleeved on the grounding wire; the lightning stroke detection unit is connected with the microprocessor unit and used for sensing a lightning stroke current signal and transmitting the lightning stroke current signal to the microprocessor unit; one end of the grounding detection unit is connected with the grounding wire through a second wiring terminal, and the other end of the grounding detection unit is connected with the micro-processing unit; the grounding detection unit is used for outputting a grounding signal and transmitting the grounding signal to the microprocessor unit; and the power supply unit is connected with the alternating current power grid through a third wiring terminal and is used for supplying power to the SPD counter.
Description
Technical Field
The utility model belongs to the lightning protection field especially relates to a SPD counter with ground connection detects.
Background
The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.
A surge protector is an electronic device for providing safety protection for various electronic equipment, instruments and meters. When peak current or voltage is generated in an electric loop or a communication loop due to external interference, the surge protector can conduct and shunt in a very short time, and other equipment in the loop is protected from being used safely.
SPD, surge protector, SPD's life has the restriction, and after reaching certain thunderbolt number of times, surge protector probably damages, can not play the thunderbolt guard action, consequently needs a equipment that can monitor SPD work. The inventor finds that the existing SPD counter does not detect the connection condition of the power connection wire shunted by the lightning stroke, and when the lightning current is generated, if the power connection wire cannot be normally connected, the lightning current cannot be discharged, and a circuit is damaged.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem, the utility model provides a SPD counter with ground connection detects, it utilizes thunderbolt detecting element response thunderbolt current signal, utilizes ground connection detecting element output ground signal and conveys to microprocessor unit simultaneously, has avoided the emergence of thunderbolt miscounting the condition promptly, can detect the state of surge protector's earth connection again.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an SPD counter with ground detection, comprising:
the current transformer is sleeved on the grounding wire; the lightning stroke detection unit is connected with the microprocessor unit and used for sensing a lightning stroke current signal and transmitting the lightning stroke current signal to the microprocessor unit;
one end of the grounding detection unit is connected with the grounding wire through a second wiring terminal, and the other end of the grounding detection unit is connected with the micro-processing unit; the grounding detection unit is used for outputting a grounding signal and transmitting the grounding signal to the microprocessor unit;
and the power supply unit is connected with a commercial power alternating current power grid through a third wiring terminal and is used for supplying power to the SPD counter.
As an embodiment, the lightning strike detection unit includes:
the lightning stroke rectifier bridge is used for rectifying mutual inductance current generated by the current transformer under the action of lightning current into a direct current signal;
the voltage stabilizing unit is used for stabilizing the rectified direct current signal;
the lightning stroke signal optical coupler is used for isolating the stabilized signal and outputting a lightning stroke detection signal;
and the lightning stroke signal control unit is used for receiving the lightning stroke detection signal and transmitting the lightning stroke detection signal to the microprocessor unit.
As an embodiment, the ground fault detection unit includes: the device comprises a grounding rectifier bridge, a preset power resistor and a grounding signal optocoupler; the grounding rectifier bridge is connected with a mains supply alternating current power grid and outputs single-phase direct current; the commercial power alternating-current power grid, the grounding rectifier bridge, the preset power resistor and the grounding signal optocoupler form a loop, and the grounding signal optocoupler is connected with a grounding wire; the grounding signal optical coupler outputs a grounding signal and transmits the grounding signal to the microprocessor unit.
In one embodiment, the microprocessor unit is further connected to a communication module, and the communication module is connected to a remote host.
As an implementation mode, the SPD counter with ground detection further comprises a housing, and a buckle is arranged at the bottom of the housing and used for installing the SPD counter with ground detection on a guide rail.
In one embodiment, the microprocessor unit is further connected to a temperature sensor for sensing the temperature within the housing and transmitting the temperature to the microprocessor unit.
In one embodiment, the microprocessor unit is further connected to a buzzer.
In one embodiment, the microprocessor unit is further connected to a display module, and the display module is configured to display an operating state of the SPD counter.
In one embodiment, the microprocessor unit is further connected with a key module.
As an embodiment, the power supply unit is further connected in series with an indicator light.
The utility model has the advantages that:
(1) the SPD counter with the grounding detection of the utility model utilizes the lightning stroke detection unit to induce the lightning stroke current signal, realizes simple and effective detection of the lightning stroke event, and avoids the occurrence of the lightning stroke miscounting condition;
(2) the SPD counter with the grounding detection function is provided with the grounding detection unit, so that the state of the grounding wire of the surge protector can be detected, and the problem that the surge protector cannot normally work due to the grounding wire problem is avoided;
(3) the utility model discloses a microprocessor unit among SPD counter with ground connection detects still is connected with communication module, and communication module and long-range host computer communication have realized thunderbolt monitoring networking and intellectuality.
Drawings
The accompanying drawings, which form a part of the specification, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention without unduly limiting the scope of the invention.
Fig. 1 is a schematic structural diagram of an SPD counter with ground fault detection according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a lightning strike detection unit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a ground fault detection unit according to an embodiment of the present invention;
fig. 4 is a structural diagram of an SPD counter housing with ground fault detection according to an embodiment of the present invention.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
In the present invention, the terms such as "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "side", "bottom", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, and are only the terms determined for convenience of describing the structural relationship of each component or element of the present invention, and are not specific to any component or element of the present invention, and are not to be construed as limiting the present invention.
In the present invention, terms such as "fixedly connected", "connected", and the like are to be understood in a broad sense, and may be fixedly connected, or may be integrally connected or detachably connected; may be directly connected or indirectly connected through an intermediate. The meaning of the above terms in the present invention can be determined according to specific situations by persons skilled in the art, and should not be construed as limiting the present invention.
As shown in fig. 1, an SPD counter with ground detection in this embodiment includes:
the current transformer 1 is sleeved on the grounding wire; the lightning stroke detection circuit comprises a current transformer 1, a lightning stroke detection unit 3, a microprocessor unit 7 and a first wiring terminal 2, wherein the lightning stroke detection unit 3 is connected with the current transformer through the first wiring terminal 2, and the lightning stroke detection unit 3 is used for inducing a lightning stroke current signal and transmitting the lightning stroke current signal to the microprocessor unit 7;
a grounding detection unit 6, one end of which is connected with the grounding wire 4 through a second wiring terminal 5, and the other end of which is connected with a micro-processing unit 7; the grounding detection unit 6 is used for outputting a grounding signal and transmitting the grounding signal to the microprocessor unit 7;
and the power supply unit is connected with a commercial power alternating current power grid 9 through a third wiring terminal 8 and is used for supplying power to the SPD counter.
In specific implementation, the microprocessor unit can be implemented by a 51-series single chip microcomputer or other programmable logic device chips.
In this embodiment, in order to induce the magnitude of the lightning current signal, the current transformer presets a coil with a corresponding number of turns.
Specifically, the power supply unit is used for rectifying, filtering and stabilizing alternating current of a commercial power alternating current power grid to obtain voltage required by the SPD counter. And the power supply unit can be implemented using an existing structure.
As shown in fig. 2, the lightning strike detection unit of the present embodiment includes:
the lightning stroke rectifier bridge 10 is used for rectifying mutual inductance current generated by the current transformer 1 under the action of lightning current into a direct current signal;
a voltage stabilization unit 11 for stabilizing the rectified dc signal;
the lightning stroke signal optocoupler 12 is used for isolating the stabilized voltage signal and outputting a lightning stroke detection signal;
and a lightning strike signal control unit 13 for receiving the lightning strike detection signal and transmitting it to the microprocessor unit.
Specifically, the lightning stroke rectifier bridge can select a specific model according to the forward current and the voltage withstanding value of the lightning stroke rectifier bridge.
The voltage stabilizing unit can be realized by adopting a voltage stabilizing chip, and the model of the voltage stabilizing unit can be specifically selected according to actual conditions.
The lightning stroke signal optical coupler can be realized by adopting an optical coupler chip, and the model of the optical coupler can be specifically selected according to actual conditions.
The lightning stroke signal control unit can be realized by a 51 series single chip microcomputer or other programmable logic device chips.
As shown in fig. 3, the ground fault detection unit of the present embodiment includes: the device comprises a grounding rectifier bridge 14, a preset power resistor 15 and a grounding signal optocoupler 16; the grounding rectifier bridge 14 is connected with a commercial power alternating current power grid 9 and outputs single-phase direct current; the commercial power alternating-current power grid 9, the grounding rectifier bridge 14, the preset power resistor 15 and the grounding signal optical coupler 16 form a loop, and the grounding signal optical coupler 16 is connected with a grounding wire; the grounding signal optical coupler 16 outputs a grounding signal and transmits the grounding signal to the microprocessor unit 7.
The grounding rectifier bridge can select a specific model according to the forward current and the withstand voltage value.
The grounding signal optical coupler can be realized by adopting an optical coupler chip, and the model of the grounding signal optical coupler can be specifically selected according to actual conditions.
In another embodiment, the microprocessor unit is further connected to a communication module, which is connected to a remote host.
In specific implementation, the communication module adopts RS485 communication, can be connected in series in multiple ways, uploads state information to the remote host, acquires a command issued by the remote host, and is provided with a transient suppression diode to protect equipment from being damaged by static electricity, surge and other impacts.
As shown in fig. 4, the SPD counter with ground detection further includes a housing 17, a buckle 18 is disposed at the bottom of the housing 17, and the buckle 18 is used to mount the SPD counter with ground detection on a guide rail.
In other embodiments, the microprocessor unit is further coupled to a temperature sensor for sensing the temperature within the housing and transmitting the temperature to the microprocessor unit.
The model of the temperature sensor can be selected according to specific situations, such as DS18B 20.
In one embodiment, the microprocessor unit is further connected to a buzzer.
In one embodiment, the microprocessor unit is further connected to a display module, and the display module is configured to display an operating state of the SPD counter.
The display module can be realized by adopting a liquid crystal display screen or an LED display screen.
In one embodiment, the microprocessor unit is further connected with a key module.
As an embodiment, the power supply unit is further connected in series with an indicator light.
Wherein, the buzzer, the display module 19, the key module 21 and the indicator light 20 are all arranged on the shell.
The SPD counter with the grounding detection of the embodiment utilizes the lightning stroke detection unit to sense the lightning stroke current signal, thereby realizing simple and effective detection of the lightning stroke event and avoiding the occurrence of the lightning stroke miscounting condition;
the SPD counter with the grounding detection function is provided with the grounding detection unit, so that the state of a grounding wire of the surge protector can be detected, and the problem that the surge protector cannot normally work due to the grounding wire problem is avoided;
the microprocessor unit in the SPD counter with the grounding detection function is also connected with the communication module, and the communication module is communicated with the remote host, so that networking and intellectualization of lightning stroke monitoring are realized.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (10)
1. An SPD counter with ground detection, comprising:
the current transformer is sleeved on the grounding wire; the lightning stroke detection unit is connected with the microprocessor unit and used for sensing a lightning stroke current signal and transmitting the lightning stroke current signal to the microprocessor unit;
one end of the grounding detection unit is connected with the grounding wire through a second wiring terminal, and the other end of the grounding detection unit is connected with the micro-processing unit; the grounding detection unit is used for outputting a grounding signal and transmitting the grounding signal to the microprocessor unit;
and the power supply unit is connected with a commercial power alternating current power grid through a third wiring terminal and is used for supplying power to the SPD counter.
2. The SPD counter with ground detection of claim 1, wherein the lightning strike detection unit comprises:
the lightning stroke rectifier bridge is used for rectifying mutual inductance current generated by the current transformer under the action of lightning current into a direct current signal;
the voltage stabilizing unit is used for stabilizing the rectified direct current signal;
the lightning stroke signal optical coupler is used for isolating the stabilized signal and outputting a lightning stroke detection signal;
and the lightning stroke signal control unit is used for receiving the lightning stroke detection signal and transmitting the lightning stroke detection signal to the microprocessor unit.
3. The SPD counter with ground detection of claim 1, wherein said ground detection unit, comprises: the device comprises a grounding rectifier bridge, a preset power resistor and a grounding signal optocoupler; the grounding rectifier bridge is connected with a mains supply alternating current power grid and outputs single-phase direct current; the commercial power alternating-current power grid, the grounding rectifier bridge, the preset power resistor and the grounding signal optocoupler form a loop, and the grounding signal optocoupler is connected with a grounding wire; the grounding signal optical coupler outputs a grounding signal and transmits the grounding signal to the microprocessor unit.
4. The SPD counter with ground detection according to claim 1, wherein said microprocessor unit is further connected to a communication module, said communication module being connected to a remote host.
5. The SPD counter with ground fault detection according to claim 1, further comprising a housing, a bottom of said housing being provided with a latch for mounting said SPD counter with ground fault detection on a rail.
6. The SPD counter with ground detection according to claim 5, wherein said microprocessor unit is further connected to a temperature sensor for sensing the temperature within the housing and transmitting to the microprocessor unit.
7. The SPD counter with ground detection according to claim 1, wherein said microprocessor unit is further connected to a buzzer.
8. The SPD counter with ground detection according to claim 1, wherein said microprocessor unit is further connected to a display module for displaying the operating status of said SPD counter.
9. The SPD counter with ground detection according to claim 1, wherein said microprocessor unit is further connected to a key module.
10. The SPD counter with ground detection of claim 1, wherein said power supply unit is further connected in series with an indicator light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020037086.6U CN211528655U (en) | 2020-01-07 | 2020-01-07 | SPD counter with ground connection detects |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020037086.6U CN211528655U (en) | 2020-01-07 | 2020-01-07 | SPD counter with ground connection detects |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211528655U true CN211528655U (en) | 2020-09-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020037086.6U Expired - Fee Related CN211528655U (en) | 2020-01-07 | 2020-01-07 | SPD counter with ground connection detects |
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| Country | Link |
|---|---|
| CN (1) | CN211528655U (en) |
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2020
- 2020-01-07 CN CN202020037086.6U patent/CN211528655U/en not_active Expired - Fee Related
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
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Granted publication date: 20200918 |