CN114089010A - High-stability electric meter capable of testing leakage current and testing system thereof - Google Patents
High-stability electric meter capable of testing leakage current and testing system thereof Download PDFInfo
- Publication number
- CN114089010A CN114089010A CN202111397899.1A CN202111397899A CN114089010A CN 114089010 A CN114089010 A CN 114089010A CN 202111397899 A CN202111397899 A CN 202111397899A CN 114089010 A CN114089010 A CN 114089010A
- Authority
- CN
- China
- Prior art keywords
- metering
- central processing
- chips
- circuit
- leakage current
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000012360 testing method Methods 0.000 title claims abstract description 26
- 238000012544 monitoring process Methods 0.000 claims abstract description 61
- 238000012545 processing Methods 0.000 claims description 66
- 230000002457 bidirectional effect Effects 0.000 claims description 52
- 230000005611 electricity Effects 0.000 claims description 7
- 230000006870 function Effects 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 2
- 238000005070 sampling Methods 0.000 abstract description 4
- 238000009826 distribution Methods 0.000 description 13
- 238000012423 maintenance Methods 0.000 description 7
- 230000001012 protector Effects 0.000 description 6
- 238000005457 optimization Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 235000017166 Bambusa arundinacea Nutrition 0.000 description 2
- 235000017491 Bambusa tulda Nutrition 0.000 description 2
- 235000015334 Phyllostachys viridis Nutrition 0.000 description 2
- 230000032683 aging Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000015556 catabolic process Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012430 stability testing Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 238000004148 unit process Methods 0.000 description 2
- 241000209128 Bambusa Species 0.000 description 1
- 241001330002 Bambuseae Species 0.000 description 1
- 239000011425 bamboo Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The invention relates to the field of electric meters, and discloses a high-stability electric meter capable of testing leakage current, which comprises a plurality of metering chips, a monitoring circuit corresponding to the metering chips, a power supply and a clock, wherein the metering chips comprise a master metering chip and at least one slave metering chip, the metering chips are connected with a judgment circuit through the monitoring circuits corresponding to the metering chips, the electric meter also comprises a plurality of current transformers, the current transformers are respectively and correspondingly arranged at the ends of wires, the secondary sides of the current transformers corresponding to each wire end are respectively connected with the metering chips, and the wires supply power to the clock through the power supply. The invention also discloses a system for testing the electric meter with high stability and capable of testing the leakage current. The judging circuit can be switched to another metering chip for sampling, so that the problem that the leakage current cannot be correctly collected due to failure of the watt-hour meter is prevented.
Description
Technical Field
The invention relates to the field of kilowatt-hour meters, in particular to a high-stability kilowatt-hour meter capable of testing leakage current and a test system thereof.
Background
At present, the operation rate of leakage protectors (including total leakage protection of distribution areas and final leakage protection used by users) of distribution network areas, especially rural distribution networks, is low, firstly, because the leakage current in the final leakage protection range of the users is large (such as leakage caused by aging of low-voltage lines of the users, unqualified household appliances and the like), the final leakage protection is frequently tripped, and even the final leakage protection cannot be put into operation at all; and secondly, the operation and maintenance of the low-voltage line of the transformer area are not in place, so that the total leakage protector of the transformer area cannot be normally put into operation (for example, the leakage is caused by the condition that trees and bamboos cannot be cleaned, and the insulation breakdown is not achieved due to the insulation aging of equipment, and the like), and certainly, the leakage protector of the last stage cannot be installed by a user due to the leakage of user equipment. The safe operation of the low-voltage line and even the equipment fault of the transformer area line can not be effectively ensured under the conditions that the user low-voltage line is aged, unqualified household appliances are used and the like cannot effectively ensure the safe power utilization of the user, the tree and bamboo channel obstacle is not cleaned in place, the equipment is insulated and aged but does not reach the insulation breakdown.
Frequent tripping after a user installs the leakage protection switch is also a main reason that the user is reluctant to install the final-stage leakage protection. The frequent tripping or the complete failure of the main leakage protection switch of the transformer area caused by the large leakage current of the transformer area is the main reason for the main leakage protection switch of the transformer area to quit the operation.
It is known that: the situation that the user is electrocuted due to the fact that the user is not provided with the final-stage leakage protector or the final-stage leakage protector is abnormally put into operation every year is more, meanwhile, the situation that the distribution network area is in fault due to grounding and short circuit of a distribution network line is more caused due to the fact that the operation and the maintenance of the distribution network are not in place, and even distribution transformation is burnt out due to the fact that a low-voltage switch and a high-voltage fuse of the distribution area are not properly configured.
Disclosure of Invention
The invention provides a high-stability electric meter capable of testing leakage current and a testing system thereof.A leakage current acquisition function is added in an intelligent electric meter in a transformer area, leakage current real-time data of all meters in the transformer area can be obtained, the leakage current of a line behind a user meter in the transformer area can be obtained by calculating the difference value of the total leakage current of the transformer area and the difference value of leakage protection data of each last stage, the data can provide a basis for production, operation and maintenance, and if the leakage current is larger, operation and maintenance personnel can carry out investigation and treatment in advance through an operation and maintenance means, and can not wait until defects develop into power failure faults and then carry out treatment.
The invention is realized by the following technical scheme:
a high-stability electric meter capable of testing leakage current comprises a plurality of metering chips, monitoring circuits corresponding to the metering chips, a power supply and a clock, wherein the metering chips comprise a main metering chip and at least one slave metering chip, the metering chips are connected with a judging circuit through the monitoring circuits corresponding to the metering chips respectively, the monitoring circuit is used for monitoring whether the metering chips are in fault or not and transmitting a monitoring result to the judging circuit, the judging circuit is used for judging whether the metering chips are in fault or not, when one metering chip is in fault, the judging circuit automatically switches output channels of the metering chips, the electric meter further comprises a plurality of current transformers, the current transformers are correspondingly arranged at a wire end respectively so as to detect the current value of the wire end, and the secondary sides of the current transformers corresponding to each wire end are connected with the metering chips respectively, the wire end supplies power to the clock through the power supply.
In the technical scheme, the current transformer is arranged at the wire end and used for detecting the current of the wire end, and comprises the current transformer used for detecting the live wire voltage of the wire end and the current transformer of the zero line voltage. The metering chip is used for detecting the value of the zero sequence current of the current transformer of the zero line voltage so as to detect the magnitude of the leakage current in the loop. When the metering chip fails, the current in the circuit cannot be correctly sampled, at the moment, the judgment circuit can be switched to another metering chip for sampling, and the situation that the leakage current cannot be correctly collected due to failure of the watt-hour meter is prevented.
Preferably, the number of the metering chips is two, the metering chips are respectively provided with a main metering chip and a slave metering chip, the monitoring circuit comprises a monitoring circuit I and a monitoring circuit II, the main metering chip is connected with the judging circuit through the monitoring circuit I, and the slave metering chip is connected with the judging circuit through the monitoring circuit II.
Therefore, the main metering chip collects the current preferentially, and the auxiliary metering chip collects the current after the main metering chip is damaged.
Preferably, the electric wire end comprises a live wire incoming wire end and a zero wire incoming wire end.
Like this, the measurement chip not only gathers the electric current size of live wire, still will gather the electric current size of zero line to monitor the return circuit electric leakage.
Preferably, the wire ends include a single-phase voltage wire end and a three-phase voltage wire end.
The invention also discloses a high-stability testing system of the electric meter capable of testing the leakage current, which comprises a plurality of central processing units and a load module, wherein the number of the central processing units corresponds to the number of the metering chips one by one, the metering chips and the central processing units are mutually connected through bidirectional tri-state gates, a plurality of monitoring circuits are respectively connected with the corresponding central processing units, a judging circuit is respectively connected with the bidirectional tri-state gates to control the on/off of the bidirectional tri-state gates, and the central processing units are commonly connected with the load module.
In the technical scheme, the on/off of the bidirectional three-state gate is controlled through the judgment circuit, so that the data outflow of the metering chip is controlled, and the load module is used for visually displaying and storing the current data in the watt-hour meter.
As an optimization, the number of the metering chips is two, a main metering chip and a secondary metering chip are respectively arranged, the monitoring circuit comprises a first monitoring circuit and a second monitoring circuit, the central processing unit comprises a first central processing unit and a second central processing unit, the first main metering chip and the first central processing unit are connected with the judging circuit through the first monitoring circuit, the secondary metering chip and the second central processing unit are connected with the judging circuit through the second monitoring circuit, the main metering chip is respectively connected with the first central processing unit and the second central processing unit through a first bidirectional tri-state gate and a third bidirectional tri-state gate, the secondary metering chip is respectively connected with the first central processing unit and the second central processing unit through a second bidirectional tri-state gate and a fourth bidirectional tri-state gate, and the judging circuit is respectively connected with the first bidirectional tri-state gate, the second central processing unit, The third bidirectional tri-state gate is coupled to the fourth bidirectional tri-state gate.
In this way, the first central processing unit preferentially processes the current collected by the metering chip, and at the moment, the first bidirectional tri-state gate and the second bidirectional tri-state gate are opened; after the first central processing unit is damaged, the second central processing unit collects current, and at the moment, the third bidirectional three-state gate and the fourth bidirectional three-state gate are opened; when the master metering chip is damaged, the second bidirectional tri-state gate and the fourth bidirectional tri-state gate are opened, and the first central processing unit processes data of the slave metering chip; when one of the metering chips and the central processing unit are damaged simultaneously, the corresponding bidirectional three-state gate is opened for data transmission.
Preferably, the load module comprises a display, a memory and an indicator light.
Therefore, the memory is used for storing data of the central processing unit, when the metering chip detects the current of the current transformer of the leakage current (zero line current) in the loop, the central processing unit transmits a signal to the indicating lamp to prompt a worker, and the display is used for displaying the size of the leakage current.
And for optimization, the first monitoring circuit and the second monitoring circuit both adopt a microprocessor chip with functions of a power supply monitoring circuit and a watchdog.
As an optimization, the slave metering chip is a hot backup of the master metering chip.
And as optimization, the second central processing unit is a hot backup of the first central processing unit.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the current transformer is arranged at the wire end and used for detecting the current at the wire end, and comprises the current transformer used for detecting the live wire voltage of the wire end and the current transformer of the zero line voltage. The metering chip is used for detecting the value of the zero sequence current of the current transformer of the zero line voltage so as to detect the magnitude of the leakage current in the loop. When the metering chip fails, the current in the circuit cannot be correctly sampled, and at the moment, the judging circuit can be switched to another metering chip for sampling, so that the situation that the leakage current cannot be correctly collected due to failure of the watt-hour meter is prevented;
2. if the leakage current exceeds the specified value, an indicator lamp on the watt-hour meter can remind a user meter which is not provided with a final leakage protector that the leakage current exceeds the value, and professional personnel are required to process the leakage current, so that the electricity utilization safety of the user is ensured; the normal operation of the total leakage protection of the transformer area and the final leakage protection of the user can be ensured through the targeted operation and maintenance processing of the transformer area and the professional processing of the user meter rear line.
Drawings
In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and that for those skilled in the art, other related drawings can be obtained from these drawings without inventive effort. In the drawings:
FIG. 1 is a wiring diagram of the single phase wire end of a high stability leakage current testable electrical meter and test system according to the present invention;
fig. 2 is a wiring diagram of three-phase line terminals of the high-stability leakage current testable watt-hour meter and the test system thereof.
Fig. 3 is a high-stability leakage current testable watt-hour meter and a judgment circuit of a test system thereof according to the invention.
Reference numbers and corresponding part names in the drawings:
1 a-a master metering chip, 1 b-a central processing unit I, 1 c-a monitoring circuit I, 2 a-a slave metering chip, 2 b-a central processing unit II, 2 c-a monitoring circuit II, 3-a judging circuit, 4-a power supply, 5-a clock, 6-a load module, 7 a-a first bidirectional three-state gate, 7 b-a second bidirectional three-state gate, 7 c-a third bidirectional three-state gate, 7 d-a fourth bidirectional three-state gate and 8-a current transformer.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and the accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not used as limiting the present invention.
Example 1
A high-stability electric meter capable of testing leakage current comprises a plurality of metering chips, monitoring circuits corresponding to the metering chips, a power supply 4 and a clock 5, wherein the metering chips comprise a main metering chip and at least one slave metering chip, the metering chips are connected with a judging circuit 3 through the monitoring circuits corresponding to the metering chips respectively, the monitoring circuits are used for monitoring whether the metering chips are in fault or not and transmitting monitoring results to the judging circuit 3, the judging circuit 3 is used for judging whether the metering chips are in fault or not, when one metering chip is in fault, the judging circuit 3 automatically switches output channels of the metering chips, the electric meter also comprises a plurality of current transformers 8, the current transformers 8 are correspondingly arranged at wire ends respectively so as to detect current values of the wire ends, a plurality of secondary sides of the current transformers 8 corresponding to each wire end are connected with the metering chips respectively, the wire end supplies power to the clock 5 through the power supply 4. The clock is a clock circuit.
In the technical scheme, the current transformer is arranged at the wire end and used for detecting the current of the wire end, and comprises the current transformer used for detecting the live wire voltage of the wire end and the current transformer of the zero line voltage. The metering chip is used for detecting the value of the zero sequence current of the current transformer of the zero line voltage so as to detect the magnitude of the leakage current in the loop. When the metering chip fails, the current in the circuit cannot be correctly sampled, at the moment, the judgment circuit can be switched to another metering chip for sampling, and the situation that the leakage current cannot be correctly collected due to failure of the watt-hour meter is prevented.
The judging circuit adopts an arbitration switching circuit, as shown in fig. 3, ST1 and ST2 are signals for judging whether the master metering chip and the slave metering chip work normally, respectively, normally is 1, and abnormally is 0, the control end which judges that the output of the circuit is 1 controls the enabling of the tri-state gate group corresponding to the metering chip which works normally, the control end which judges that the output of the circuit is 0 controls the disabling of the tri-state gate group corresponding to the other metering chip, and similarly, ST3 and ST4 are respectively for judging whether the first central processing unit and the second central processing unit work normally.
In this embodiment, the number of the metering chips is two, and the two metering chips respectively have a master metering chip 1a and a slave metering chip 2a, the monitoring circuit includes a first monitoring circuit 1c and a second monitoring circuit 2c, the master metering chip 1a is connected to the judging circuit 3 through the first monitoring circuit 1c, and the slave metering chip 2a is connected to the judging circuit 3 through the second monitoring circuit 2 c.
Therefore, the main metering chip collects the current preferentially, and the auxiliary metering chip collects the current after the main metering chip is damaged.
In this embodiment, the wire end includes a live wire incoming wire end and a neutral wire incoming wire end.
Therefore, the metering chip not only collects the current of the live wire, but also collects the current of the zero line, so that the leakage of the loop is monitored.
In this embodiment, the wire terminals include a single-phase voltage wire terminal and a triple-phase voltage wire terminal.
Example 2
The invention also discloses a high-stability testing system of the electric meter capable of testing the leakage current, which comprises a plurality of central processing units and a load module 6, wherein the number of the central processing units corresponds to the number of the metering chips one by one, the metering chips and the central processing units are mutually connected through bidirectional tri-state gates, a plurality of monitoring circuits are respectively connected with the corresponding central processing units, the judging circuit 3 is respectively connected with the bidirectional tri-state gates to control the on/off of the bidirectional tri-state gates, and the central processing units are commonly connected with the load module 6.
In the technical scheme, the on/off of the bidirectional three-state gate is controlled through the judgment circuit, so that the data outflow of the metering chip is controlled, and the load module is used for visually displaying and storing the current data in the watt-hour meter.
In this embodiment, the two metering chips are provided, each of the two metering chips has a master metering chip 1a and a slave metering chip 2a, the monitoring circuit includes a monitoring circuit one 1c and a monitoring circuit two 2c, the central processing unit includes a central processing unit one 1b and a central processing unit two 2b, the master metering chip 1a and the central processing unit one 1b are connected to the judging circuit 3 through the monitoring circuit one 1c, the slave metering chip 2a and the central processing unit two 2b are connected to the judging circuit 3 through the monitoring circuit two 2c, the master metering chip 1a is connected to the central processing unit one 1b and the central processing unit two 2b through a first bidirectional tri-state gate 7a and a third bidirectional tri-state gate 7c, the slave metering chip 2a is connected to the central processing unit one 1b and the central processing unit two 2b through a second bidirectional tri-state gate 7b and a fourth bidirectional tri-state gate 7d, the judging circuit 3 is respectively connected with the first bidirectional tri-state gate 7a, the second bidirectional tri-state gate 7b, the third bidirectional tri-state gate 7c and the fourth bidirectional tri-state gate 7 d.
In this way, the first central processing unit preferentially processes the current collected by the metering chip, and at the moment, the first bidirectional tri-state gate and the second bidirectional tri-state gate are opened; after the first central processing unit is damaged, the second central processing unit collects current, and at the moment, the third bidirectional three-state gate and the fourth bidirectional three-state gate are opened; when the master metering chip is damaged, the second bidirectional tri-state gate and the fourth bidirectional tri-state gate are opened, and the first central processing unit processes data of the slave metering chip; when one of the metering chips and the central processing unit are damaged simultaneously, the corresponding bidirectional three-state gate is opened for data transmission.
In this embodiment, the load module 6 includes a display, a memory, and an indicator light.
Therefore, the memory is used for storing data of the central processing unit, when the metering chip detects the current of the current transformer of the leakage current (zero line current) in the loop, the central processing unit transmits a signal to the indicating lamp to prompt workers, and the display is used for displaying the size of the leakage current. Through the transformation of the user watt-hour meter, the leakage current of the user is monitored and the alarm is given on the watt-hour meter, and the data is uploaded to the electric energy and electric quantity acquisition system to inform the user that the leakage current exceeds the standard and the magnitude of the leakage current
In this embodiment, the first monitoring circuit 1c and the second monitoring circuit 2c both use a microprocessor chip having a power monitoring circuit and a watchdog function.
In this embodiment, the slave metering chip 2a is a hot backup of the master metering chip 1 a.
In this embodiment, the second cpu 2b is a hot backup of the first cpu 1 b.
The central processing unit can be connected with a user electricity utilization information acquisition system through a wired/wireless network, processed data are transmitted to the system, the system can send leakage alarm information to a user through a wireless network in a short message mode or the like, or prompt can be given through the system. The electric meter can be arranged at a station main end and a user end, and can be used for performing calculation by collecting the total leakage current of users and the station and utilizing kirchhoff's law, so that the electric meter can prompt the users of the users with the leakage current exceeding the standard through an online national network system or short messages; secondly, the magnitude of the leakage current of the transformer area network is calculated through the user electricity consumption information acquisition system, the operation condition of the transformer area equipment network is judged, the condition that the leakage current of the transformer area exceeds the standard is alarmed, and if the transformer area has a network fault, the magnitude of the leakage current of the transformer area can be used as a fault finding through the user electricity consumption information acquisition system. The system can set different total leakage current reminding values for the distribution room network structure through analyzing related data (the total leakage current of the distribution room, the sum of the leakage current of each user, namely the leakage current between the distribution room and the equipment between the users), remind a watt-hour meter at the total end of the distribution room with an indicating lamp, and remind the distribution room that the total leakage current value exceeds a specified value in a user electricity utilization information acquisition system. And reminding the operation and maintenance department of arranging personnel to check or reform the transformer area.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (10)
1. The electric meter is characterized by comprising a plurality of metering chips, monitoring circuits corresponding to the metering chips, a power supply (4) and a clock (5), wherein the metering chips comprise a master metering chip and at least one slave metering chip, the metering chips are connected with a judgment circuit (3) through the monitoring circuits corresponding to the metering chips respectively, the monitoring circuits are used for monitoring whether the metering chips are in fault or not and transmitting monitoring results to the judgment circuit (3), the judgment circuit (3) is used for judging whether the metering chips are in fault or not, when one metering chip is in fault, the judgment circuit (3) automatically switches output channels of the metering chips, the electric meter also comprises a plurality of current transformers (8), and the current transformers (8) are correspondingly arranged at the ends of electric wires respectively, the secondary sides of the current transformers (8) corresponding to each wire end are respectively connected with the metering chips so as to detect the current value of the wire end, and the wire end supplies power to the clock (5) through the power supply (4).
2. The electric meter according to claim 1, wherein there are two metering chips, there is a master metering chip (1a) and a slave metering chip (2a), the monitoring circuit comprises a first monitoring circuit (1c) and a second monitoring circuit (2c), the master metering chip (1a) is connected to the judging circuit (3) through the first monitoring circuit (1c), and the slave metering chip (2a) is connected to the judging circuit (3) through the second monitoring circuit (2 c).
3. A high stability leakage current testable electrical meter according to claim 1, wherein said wire terminals include a live inlet terminal and a neutral inlet terminal.
4. A high stability leakage current testable electricity meter according to any one of claims 1 to 3, wherein the line terminals include single phase voltage line terminals and three phase voltage line terminals.
5. A test system for an electric meter for testing high stability and testable leakage current according to any of claims 1-4, characterized in that it comprises a plurality of central processing units and a load module (6), the number of said central processing units corresponding to the number of said metering chips, wherein said metering chips and said central processing units are interconnected by means of bidirectional tri-state gates, said monitoring circuits are connected to the corresponding central processing units, said judging circuits (3) are connected to the bidirectional tri-state gates, respectively, for controlling the on/off of said bidirectional tri-state gates, and said central processing units are connected to said load module (6) in common.
6. The system for testing the electric meter with high stability and capable of testing the leakage current according to claim 5, wherein the number of the metering chips is two, there is a master metering chip (1a) and a slave metering chip (2a), the monitoring circuit comprises a first monitoring circuit (1c) and a second monitoring circuit (2c), the central processing unit comprises a first central processing unit (1b) and a second central processing unit (2b), the master metering chip (1a) and the first central processing unit (1b) are connected with the judging circuit (3) through the first monitoring circuit (1c), the slave metering chip (2a) and the second central processing unit (2b) are connected with the judging circuit (3) through the second monitoring circuit (2c), and the master metering chip (1a) is connected with the first central processing unit (1b) and the central processing unit through a first bidirectional tri-state gate (7a) and a third bidirectional tri-state gate (7c), respectively The second processor (2b) is connected, the slave metering chip (2a) is respectively connected with the first central processor (1b) and the second central processor (2b) through a second bidirectional tri-state gate (7b) and a fourth bidirectional tri-state gate (7d), and the judging circuit (3) is respectively connected with the first bidirectional tri-state gate (7a), the second bidirectional tri-state gate (7b), a third bidirectional tri-state gate (7c) and the fourth bidirectional tri-state gate (7 d).
7. A high stability leakage current testable electrical meter test system according to claim 5, characterized in that the load module (6) comprises a display, a memory, an indicator light.
8. The system for testing the electric meter with high stability and capable of testing the leakage current according to claim 5, wherein the first monitoring circuit (1c) and the second monitoring circuit (2c) both adopt a microprocessor chip with functions of a power supply monitoring circuit and a watchdog.
9. A high stability leakage current testable electrical meter test system according to claim 6, characterized in that the slave metering chip (2a) is a hot backup of the master metering chip (1 a).
10. A high stability leakage current testable electricity meter according to any of claims 5-9, characterized in that the central processing unit two (2b) is a hot backup of the central processing unit one (1 b).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111397899.1A CN114089010A (en) | 2021-11-19 | 2021-11-19 | High-stability electric meter capable of testing leakage current and testing system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111397899.1A CN114089010A (en) | 2021-11-19 | 2021-11-19 | High-stability electric meter capable of testing leakage current and testing system thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114089010A true CN114089010A (en) | 2022-02-25 |
Family
ID=80303517
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202111397899.1A Pending CN114089010A (en) | 2021-11-19 | 2021-11-19 | High-stability electric meter capable of testing leakage current and testing system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114089010A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060966A (en) * | 2022-08-16 | 2022-09-16 | 石家庄科林电气股份有限公司 | Electric quantity metering method and device and electric energy meter |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101030107B1 (en) * | 2010-09-30 | 2011-04-20 | 주식회사 나라컨트롤 | Illumination equipment puts out leakage electric current diagnosis and integration energy detection system |
| CN102830255A (en) * | 2012-08-23 | 2012-12-19 | 王金泽 | Smart electricity meter with function of monitoring and protecting power failure |
| CN103309231A (en) * | 2013-05-31 | 2013-09-18 | 奇瑞汽车股份有限公司 | Chip redundancy control method |
| US20140253139A1 (en) * | 2013-03-08 | 2014-09-11 | Caterpillar Inc. | Fault detection system with leakage current detection |
| CN105204777A (en) * | 2015-08-19 | 2015-12-30 | 上海斐讯数据通信技术有限公司 | Electronic device |
| CN108539865A (en) * | 2018-05-31 | 2018-09-14 | 浙江永泰隆电子股份有限公司 | Electric power monitoring system |
| CN113120071A (en) * | 2019-12-30 | 2021-07-16 | 上海汽车集团股份有限公司 | Electric power steering control system |
-
2021
- 2021-11-19 CN CN202111397899.1A patent/CN114089010A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101030107B1 (en) * | 2010-09-30 | 2011-04-20 | 주식회사 나라컨트롤 | Illumination equipment puts out leakage electric current diagnosis and integration energy detection system |
| CN102830255A (en) * | 2012-08-23 | 2012-12-19 | 王金泽 | Smart electricity meter with function of monitoring and protecting power failure |
| US20140253139A1 (en) * | 2013-03-08 | 2014-09-11 | Caterpillar Inc. | Fault detection system with leakage current detection |
| CN103309231A (en) * | 2013-05-31 | 2013-09-18 | 奇瑞汽车股份有限公司 | Chip redundancy control method |
| CN105204777A (en) * | 2015-08-19 | 2015-12-30 | 上海斐讯数据通信技术有限公司 | Electronic device |
| CN108539865A (en) * | 2018-05-31 | 2018-09-14 | 浙江永泰隆电子股份有限公司 | Electric power monitoring system |
| CN113120071A (en) * | 2019-12-30 | 2021-07-16 | 上海汽车集团股份有限公司 | Electric power steering control system |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115060966A (en) * | 2022-08-16 | 2022-09-16 | 石家庄科林电气股份有限公司 | Electric quantity metering method and device and electric energy meter |
| CN115060966B (en) * | 2022-08-16 | 2022-11-08 | 石家庄科林电气股份有限公司 | Electric quantity metering method and device and electric energy meter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108132425A (en) | Power grid distribution line failure on-line monitoring method and system | |
| WO2013131392A1 (en) | Dc power supply dynamic simulation system and dc power supply test system | |
| CN104614642A (en) | Small current grounding line selection method | |
| WO2008146040A1 (en) | System for identifying fire risk | |
| CN111579934A (en) | Method and device for realizing electric safety monitoring of external power network of base station and base station | |
| CN114089010A (en) | High-stability electric meter capable of testing leakage current and testing system thereof | |
| CN201365142Y (en) | Distribution transformer monitoring terminal with high reliability | |
| CN110749802B (en) | Fault positioning method and system for low-voltage distribution network | |
| CN204992785U (en) | Take low voltage network monitored control system of trouble early warning and diagnostic function | |
| CN204992580U (en) | Expanded not repeated fixed measuring equipment of dual power supply | |
| CN111398857A (en) | Single-phase earth fault detection system of line selection device for arc suppression coil grounding system | |
| CN112557943A (en) | Low-voltage switch system based on double current transformers | |
| CN110504756A (en) | A kind of ring network cabinet protective device control system | |
| CN220628960U (en) | Intelligent electricity consumption monitor with wireless internet of things communication band energy consumption monitoring function | |
| CN217332751U (en) | Alternating current circuit breaker level difference cooperation testing device | |
| CN105186457A (en) | Low-voltage motor protection device | |
| CN211086548U (en) | Distributed grounding line selection device based on main machine and sub machine | |
| CN110752672A (en) | Fault alarm system and method for low-voltage distribution network | |
| CN217112562U (en) | Power supply and distribution fault handling device and power supply and distribution system | |
| CN204992273U (en) | Expanded pull -out type measuring equipment that does not repeat of dual power supply | |
| CN204992260U (en) | Expanded not repeated fixed measuring equipment of single mains operated | |
| CN220627178U (en) | 32-channel leakage electric fire monitoring device for wireless communication | |
| CN217932491U (en) | Load power consumption monitoring and protecting device | |
| CN113419103B (en) | Electrical fire early warning system and method for transformer for station | |
| CN215894801U (en) | High-fault meter box comprehensive diagnosis device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20220225 |