CN210609170U - HPLC communication module with overcurrent prevention function in electric energy meter, and electric energy meter - Google Patents
HPLC communication module with overcurrent prevention function in electric energy meter, and electric energy meter Download PDFInfo
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- CN210609170U CN210609170U CN201922200471.8U CN201922200471U CN210609170U CN 210609170 U CN210609170 U CN 210609170U CN 201922200471 U CN201922200471 U CN 201922200471U CN 210609170 U CN210609170 U CN 210609170U
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- 238000004891 communication Methods 0.000 title claims abstract description 41
- 238000004128 high performance liquid chromatography Methods 0.000 title claims abstract 34
- 230000002265 prevention Effects 0.000 title claims description 6
- 238000012544 monitoring process Methods 0.000 claims description 16
- 230000000087 stabilizing effect Effects 0.000 claims description 7
- 230000001419 dependent effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004973 liquid crystal related substance Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000013024 troubleshooting Methods 0.000 description 1
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Abstract
The utility model discloses a have HPLC communication module, electric energy meter of preventing overflowing the function in the electric energy meter, this HPLC module includes the HPLC module, removes in HPLC module and the electric energy meter table meter circuit connection outside the HPLC module still includes the first overcurrent protection module that sets up at the input of HPLC module for absorb the unnecessary electric current of HPLC module input side. The utility model discloses have and prevent that the HPLC module overflows the function, and simple structure, with low costs, fail safe nature height.
Description
Technical Field
The utility model relates to an electric power system equipment technical field especially relates to a HPLC (high speed power line carrier) communication module who has the function of preventing overflowing in electric energy meter.
Background
The HPLC technology has the advantages of large bandwidth, high transmission rate and the like, and can meet the higher requirement of low-voltage power line carrier communication, and the conventional communication module is gradually replaced by the HPLC communication module in the current electric meter, so that the functions of data transmission, data reading, power failure event reporting and the like are realized. The HPLC module of the prior art electric energy meter is usually configured as shown in fig. 1, i.e. the HPLC communication module is directly connected to the meter circuit, and only the front end of the meter circuit (i.e. the back end of the strong current terminal (220V) of the HPLC module) is provided with a voltage dependent resistor to prevent the meter circuit from overcurrent. However, in the actual use process of the HPLC module with the above structure, since the piezoresistor is only arranged at the front end of the meter and the piezoresistor at the front end of the meter is arranged at the rear end of the strong current terminal (220V) of the HPLC module, the HPLC communication module is not protected, when strong electromagnetic interference (such as surge, impact, and harmonic) with large energy exists in the power utilization site, the HPLC communication module may be abnormally operated or even burnt, for example, faults such as burning of a clamping diode, burning of a coupling coil, burning of a current limiting resistor, and the like occur, and meanwhile, an unprotected circuit at the front end of the piezoresistor at the meter end may also be burnt, so that a large potential safety hazard exists.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in: technical problem to prior art exists, the utility model provides a have and prevent that HPLC module overflows the function, and simple structure, with low costs, high safe and reliable's HPLC module, electric energy meter.
In order to solve the technical problem, the utility model provides a technical scheme does:
an HPLC communication module with an overcurrent prevention function in an electric energy meter comprises an HPLC module, the HPLC module is connected with a meter circuit except the HPLC module in the electric energy meter, and the HPLC communication module further comprises a first overcurrent protection module arranged at the input end of the HPLC module and used for absorbing redundant current at the input side of the HPLC module.
Further, the first overcurrent protection module comprises more than one first resistance unit for absorbing redundant current, and each first resistance unit comprises more than one resistor.
Further, the resistor is a piezoresistor.
Further, the output end of the HPLC module is further provided with a second overcurrent protection module for absorbing excess current at the output side of the HPLC module.
Further, the second overcurrent protection module comprises more than one second resistance unit for absorbing redundant current, and each second resistance unit comprises more than one resistor.
Further, the system also comprises an overcurrent state monitoring module connected with the HPLC module and used for monitoring the overcurrent state of the HPLC module and sending preset alarm information when the condition that the overcurrent occurs is monitored.
Further, the HPLC module is connected with the meter circuits except the HPLC module through a control switch, and the connection and disconnection between the HPLC module and the meter circuits except the HPLC module are controlled through the control switch.
Furthermore, the control switch is connected with the overcurrent state monitoring module, and when the overcurrent state monitoring module monitors that a fault occurs, the overcurrent state monitoring module sends a control instruction to the control switch to control the control switch to be switched off.
And the power input end of the HPLC module is also provided with a voltage stabilizing module.
An electric energy meter comprises the HPLC communication module.
Compared with the prior art, the utility model has the advantages of: the utility model discloses a set up first overcurrent protection module at the input side of HPLC module, absorb the unnecessary electric current of HPLC module input side, can realize the overcurrent protection of HPLC module, when there is the great strong electromagnetic interference of energy to exist at the power consumption scene, can avoid HPLC communication module work unusual and cause the burnout, can also protect meter front end circuit in order to avoid being burnt out, compare in the tradition in the meter side, HPLC module rear end sets up a piezo-resistor, can effectively improve the holistic fail safe nature of HPLC communication module and electric energy meter.
Drawings
Fig. 1 is a schematic diagram of a setting principle of an HPLC communication module of a prior art electric energy meter.
Fig. 2 is a schematic structural diagram of an HPLC communication module with an overcurrent prevention function in the electric energy meter according to the embodiment.
Fig. 3 is a schematic circuit diagram of an HPLC communication module in an embodiment of the present invention.
Illustration of the drawings: 1. an HPLC module; 2. a first overcurrent protection module; 3. a second overcurrent protection module; 4. an overcurrent state monitoring module; 5. a control switch; 6. and a voltage stabilizing module.
Detailed Description
The invention will be further described with reference to the drawings and specific preferred embodiments without limiting the scope of the invention.
As shown in fig. 2, the HPLC communication module with the overcurrent protection function in the electric energy meter of this embodiment includes an HPLC module 1, the HPLC module 1 is connected to a meter circuit except for the HPLC module 1 in the electric energy meter, and further includes a first overcurrent protection module 2 disposed at an input end of the HPLC module 1, and configured to absorb an excess current at an input side of the HPLC module 1.
This embodiment is through setting up first overcurrent protection module 2 at the input side of HPLC module 1, absorb the unnecessary electric current of HPLC module 1 input side, can realize the overcurrent protection of HPLC module 1, there is the great strong electromagnetic interference of energy (like surge, impact, harmonic) to exist when the power consumption scene, can avoid HPLC communication module work unusual and cause the burnout, can also protect meter front-end circuit in order to avoid being burnt out, compare in the tradition in the meter side, HPLC module rear end sets up a piezo-resistor, can effectively improve the holistic fail safe nature of HPLC communication module and electric energy meter.
In this embodiment, the first overcurrent protection module 2 includes more than one first resistance unit 21 for absorbing the redundant current, each first resistance unit 21 includes more than one resistor, and the resistor may be a protection resistor such as a varistor.
In a specific application embodiment, the first overcurrent protection module 2 may directly and simply set one first resistance unit 21, and also may configure more than two first resistance units 21 according to actual requirements, and each first resistance unit 21 is connected in parallel to improve overcurrent protection performance, and each first resistance unit 21 may directly be formed by one voltage dependent resistor, or formed by connecting more than two resistors in parallel or in series and combining, so as to meet protection requirements of various overcurrent conditions.
In a specific application embodiment, the first overcurrent protection module 2 may be arranged at the front end of the HPLC communication module based on a conventional electric energy meter, as shown in fig. 3, a voltage dependent resistor is arranged at the input end of the HPLC module 1 to replace the voltage dependent resistor at the meter side and the rear end of the HPLC communication module in the original electric energy meter, so as to implement the overall overcurrent protection of the HPLC communication module and the electric energy meter, and reduce the implementation cost.
Further, in this embodiment, a second overcurrent protection module 3 may be further disposed at an output end of the HPLC module 1, and is configured to absorb excess current at an output side of the HPLC module 1, that is, the second overcurrent protection module 3 is disposed at the rear end of the HPLC module 1 and the front end of the meter circuit except the HPLC module 1, so that the overcurrent protection performance can be further improved by combining the first overcurrent protection module 2, and the overall safety and reliability of the HPLC communication module and the electric energy meter can be ensured.
In this embodiment, the second overcurrent protection module 3 includes more than one second resistance unit 31 for absorbing the redundant current, each second resistance unit 31 includes more than one resistor, and the resistor may specifically adopt a protection resistor such as a varistor.
The second overcurrent protection module 3 may directly and simply set one first resistance unit 21, and may also configure two or more first resistance units 21 according to actual requirements, and each first resistance unit 21 is connected in parallel to improve overcurrent protection performance, and each first resistance unit 21 may directly adopt one voltage dependent resistor, or may adopt two or more resistors connected in parallel or in series and combined to meet protection requirements of various overcurrent conditions. The second overcurrent protection module 3 may adopt the same structure as the first overcurrent protection module 2, or may adopt a different structure according to actual requirements.
In this embodiment, the system further includes an overcurrent state monitoring module 4 connected to the HPLC module 1, and configured to monitor an overcurrent state of the HPLC module 1, and send preset alarm information when an overcurrent is monitored. When the HPLC communication module has an overcurrent fault, the electric energy meter cannot work normally, and a specific fault point can be located only by troubleshooting and analyzing after the electric energy meter is removed in the maintenance process of the electric energy meter. In this embodiment, the overcurrent state monitoring module 4 is configured to monitor the overcurrent state of the HPLC module 1 (specifically, it may be configured that whether the detected current value exceeds a preset threshold, and when exceeding the preset threshold, it is determined that overcurrent occurs), and when the overcurrent is monitored, preset alarm information is sent, so that the overcurrent fault of the HPLC communication module can be timely discovered and located, and the fault can be timely processed.
In this embodiment, the HPLC module 1 is connected to the meter circuits except for the HPLC module 1 through the control switch 5, and the connection between the HPLC module 1 and the meter circuits except for the HPLC module 1 is controlled through the control switch 5, so that the connection between the HPLC module 1 and the meter circuits except for the HPLC module 1 can be controlled, and the connection between the HPLC module 1 and the meter circuits except for the HPLC module 1 can be disconnected when necessary.
In this embodiment, the specific control switch 5 is connected to the overcurrent state monitoring module 4, and when the overcurrent state monitoring module 4 monitors that a fault occurs, the control switch 5 is turned off by sending a control instruction to the control switch 5. When the HPLC module 1 is over-current, further diffusion may burn out other circuits of the meter, causing greater loss. In the embodiment, the overcurrent state of the HPLC module 1 is monitored by the overcurrent state monitoring module 4, and when the overcurrent is monitored, the control switch 5 is immediately turned off to disconnect the connection between the HPLC module 1 and other circuits of the meter, so that the overcurrent fault is prevented from further extending to other circuits of the meter, and the fault influence is reduced as much as possible.
In this embodiment, the power input end of the HPLC module 1 is further provided with a voltage stabilizing module 6. The traditional HPLC communication module is usually directly powered by a power supply of an electric energy meter, and the power supply voltage output by the electric energy meter to the module may exceed the withstand voltage value of an internal device of the HPLC module, so that the device is broken down, the power supply has heavy load, the voltage is pulled down, and the MCU and the liquid crystal of the electric energy meter are influenced, and the white screen of the electric energy meter and the like are caused, so that the electric energy meter cannot work normally. In this embodiment, the voltage stabilizing module 6 is disposed at the power input end of the HPLC module 1 to stabilize the power supply connected to the HPLC module 1, so that the voltage is stabilized in a suitable range required by the HPLC module 1, and the safety and reliability of the HPLC module 1 can be further ensured. The voltage stabilizing module 6 may specifically employ a voltage stabilizing device such as a zener diode.
The embodiment further comprises the electric energy meter, the electric energy meter comprises the HPLC communication module and the meter circuit except the HPLC module 1, the overall overcurrent protection of the HPLC communication module and the meter circuit except the HPLC module 1 can be realized, and the safety and reliability of the electric energy meter are high.
The foregoing is illustrative of the preferred embodiment of the present invention and is not to be construed as limiting the invention in any way. Although the present invention has been described with reference to the preferred embodiments, it is not intended to limit the present invention. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention should fall within the protection scope of the technical solution of the present invention.
Claims (10)
1. An HPLC communication module with an overcurrent prevention function in an electric energy meter comprises an HPLC module (1), wherein the HPLC module (1) is connected with meter circuits in the electric energy meter except the HPLC module (1), and the HPLC communication module is characterized in that: the device also comprises a first overcurrent protection module (2) arranged at the input end of the HPLC module (1) and used for absorbing redundant current at the input side of the HPLC module (1).
2. The HPLC communication module with the function of preventing overcurrent in the electric energy meter according to claim 1, wherein: the first overcurrent protection module (2) comprises more than one first resistance unit (21) for absorbing redundant current, and each first resistance unit (21) comprises more than one resistor.
3. The HPLC communication module with the function of preventing overcurrent in the electric energy meter according to claim 2, wherein: the resistor is a piezoresistor.
4. An HPLC communication module with an overcurrent protection function in the electric energy meter according to claim 1, 2 or 3, wherein: and the output end of the HPLC module (1) is also provided with a second overcurrent protection module (3) for absorbing redundant current on the output side of the HPLC module (1).
5. The HPLC communication module with the over-current prevention function in the electric energy meter according to claim 4, wherein: the second overcurrent protection module (3) comprises more than one second resistance unit (31) for absorbing redundant current, and each second resistance unit (31) comprises more than one resistor.
6. An HPLC communication module with an overcurrent protection function in the electric energy meter according to claim 1, 2 or 3, wherein: the device also comprises an overcurrent state monitoring module (4) connected with the HPLC module (1) and used for monitoring the overcurrent state of the HPLC module (1), and sending preset alarm information when monitoring that overcurrent occurs.
7. The HPLC communication module with the function of preventing overcurrent in the electric energy meter according to claim 6, wherein: the HPLC module (1) is connected with meter circuits except the HPLC module (1) through a control switch (5), and the control switch (5) is used for controlling connection and disconnection between the HPLC module (1) and the meter circuits except the HPLC module (1).
8. The HPLC communication module with the function of preventing overcurrent in the electric energy meter according to claim 7, wherein: the control switch (5) is connected with the overcurrent state monitoring module (4), and when the overcurrent state monitoring module (4) monitors that a fault occurs, a control instruction is sent to the control switch (5) to control the control switch (5) to be disconnected.
9. An HPLC communication module with an overcurrent protection function in the electric energy meter according to claim 1, 2 or 3, wherein: and the power supply input end of the HPLC module (1) is also provided with a voltage stabilizing module (6).
10. An electric energy meter comprising an HPLC communication module according to any of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922200471.8U CN210609170U (en) | 2019-12-10 | 2019-12-10 | HPLC communication module with overcurrent prevention function in electric energy meter, and electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922200471.8U CN210609170U (en) | 2019-12-10 | 2019-12-10 | HPLC communication module with overcurrent prevention function in electric energy meter, and electric energy meter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210609170U true CN210609170U (en) | 2020-05-22 |
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ID=70698129
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922200471.8U Active CN210609170U (en) | 2019-12-10 | 2019-12-10 | HPLC communication module with overcurrent prevention function in electric energy meter, and electric energy meter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210609170U (en) |
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2019
- 2019-12-10 CN CN201922200471.8U patent/CN210609170U/en active Active
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