CN106370926A - Missing electric quantity recorder for electric energy meter changing work and using method thereof - Google Patents
Missing electric quantity recorder for electric energy meter changing work and using method thereof Download PDFInfo
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Abstract
The invention discloses a missing electric quantity recorder for electric energy meter changing work and a using method thereof. The recorder is composed of a sampling unit, a control unit, a communication unit and a power supply module. The control unit is connected with the communication unit; and the sampling unit and the control unit are connected with the power supply module. The control unit consists of a control chip, a computing module and a control panel. The communication unit includes a wireless communication module and an ethernet communication interface. According to the invention, improvement is made based on the traditional intelligent multifunctional electric energy meter; and on the basis of the phase meter and electric energy meter elements, the single-chip microcomputer function is introduced to realize data storage and management; and then some quick operation keys are added to realize a non-redundancy effect for an element design, so that the meter size and weight are reduced to realize high portability. Therefore, the recorder has advantages of small size, light weight, and simple, rapid, and convenient wiring and clearing.
Description
Technical field
The present invention relates to electric energy meter Auxiliary equipment technical field, more particularly, to electric energy meter change table operation leakage quantity calculation monitor and using method.
Background technology
Electric energy meter calibration code specifies, installing type electric energy meter has certain cycle of operation, expires and must force rotation.For the electric energy meter accessing through transformer with binding post, for ensureing its power supply reliability, typically all change table using powered.This creates the terminal a problem it is simply that leak during changing table meter electricity this how to calculate.In this regard, we generally use watt-second method, that is, write down the power changing respective lines before table, write down the time changed used by table after changing end of list (EOL) again, leakage quantity calculation is calculated according to formula w=p × t.Wherein w is to change leakage meter electric energy during table, and p is to change line power before table, and t is the time changed used by table.This calculating change table during electricity method to the eye possible in theory, in fact there is very big defect, its reason is as follows；First, power p in road accurately obtains because field condition limitation is very difficult；Secondly, this formula only could use in the case that power invariability is constant, but actually customer charge changes within the specific limits, so replace its mean power less science with the instantaneous power in circuit moment, if expecting accurate electricity, it correctly leaks quantity calculation expression formula and should be:, i.e. leakage quantity calculation circuit instantaneous power and the integration of time；Simultaneously, change table time t to be also less susceptible to determine, this limits mainly due to work on the spot custom and actual conditions, staff often less notices that record changes the time used by table, the electricity adding during changing table when finally changing table work ticket to process can only estimate a number by rule of thumb, there will necessarily be certain difference with true leakage quantity calculation.
The patent of Application No. 201410125460.7 provides electricity recorder analyser, including: the main frame of front-collection device and upper control analysis machine is arranged in full almag cabinet, the liquid crystal display of upper control analysis machine and cabinet are in eversion type structure setting outside cabinet, this liquid crystal display is connected with the incline of the top cover of cabinet by rotating shaft, and the data wire that this liquid crystal display passes through in rotating shaft is connected with main frame；The outer surface of the top cover of cabinet is provided with the keyboard being connected with main frame and mouse touch pad, and the depth of the display screen indent of liquid crystal display is more than the height of keyboard；The rear wall of above-mentioned cabinet is provided with front-collection device corresponding signals collecting interface, and the side wall of cabinet is provided with the power supply interface of front-collection device and main frame, and respective hosts outreach interface.The communication robust that the present invention solves electricity (waveform) the recorder analyser presence of separate structure is poor, and inconvenient problem with use improves the performance of equipment.
The patent of Application No. 201320293295.7 is related to a kind of electricity recorder analyser, including casing and the electricity record analyses circuit being installed in casing；Described electricity record analyses circuit includes the data measurement circuit data process circuit being electrically connected to each other；Described data measurement circuit has multiple DATA REASONING interfaces, and each DATA REASONING interface is sequentially connected soft holding wire and open type micro-transformer of current respectively.A kind of electricity recorder analyser provided in an embodiment of the present invention, data measurement circuit is combined with data processing circuit, facilitates the use of general family；Its data measures process does not need to change former wiring, safe and reliable.
But, above scheme is all that conventional electricity is calculated, recorded and analyzed, a kind of instrumentation or method do not carry out accurate recording for the electrical leakage quantity in swap table operation process, so, it is proposed that a kind of electric energy meter is powered changes the Design Conception that table leaks quantity calculation monitor.
Content of the invention
Present invention aim at providing electric energy meter to change table operation leakage quantity calculation monitor and using method, small volume, lightweight, it is easy to carry, intuitive operation can be carried out by control button interface, and there is data storage and query function.
For achieving the above object, the technical solution used in the present invention is: electric energy meter changes table operation leakage quantity calculation monitor, including sampling unit, control unit, communication unit and power module, described control unit is connected with described communication unit, and described sampling unit, described control unit are connected with described power module respectively；Described control unit includes control chip, computing module and control panel, and described communication unit includes wireless communication module and ethernet interface.
Described power module includes ct electricity-fetching module and pt electricity-fetching module, and described ct electricity-fetching module is connected with described sampling unit, and described pt electricity-fetching module is connected with described control unit.
Described sampling unit includes voltage collector and current collector.
Described control chip includes singlechip chip or dsp chip.
Described computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, described power multiplier is connected with described sampling unit, and described Voltage-to-frequency Converter, described frequency divider, described enumerator and described electric degree display-memory are connected with described control chip respectively.
Described control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, and described function button plate includes power button, reset key and keeps button, and described input/output interface is connected with described sampling unit.
Described pt electricity-fetching module includes passive induction energy fetching device and connected rectification reduction voltage circuit.
Described power module connects backup battery, and described backup battery includes charged lithium cells.
Electric energy meter changes the using method that quantity calculation monitor is leaked in table operation, comprises the steps:
1) input/output interface in monitor accesses the meter specially flexible circuit conductor with connection-peg；
2) adjust the gear adjustable plate on control panel, monitor is transformed into electric energy/kwh gear, reset instrument tolerance digital display shows clearing simultaneously；
3) according to order, the voltage parallel being changed electric energy meter voltage circuit is accessed monitor, then access monitor by parallel at terminal block for the electric current being changed electric energy meter current loop；
4) start monitor, proceed by Lou quantity calculation record, change electric energy meter simultaneously, first remove the current loop being changed electric energy meter, remove the voltage circuit being changed electric energy meter afterwards；
5) by the new electric energy meter access electric line changed, according to first accessing voltage circuit, access the order of current loop afterwards；
6) after completing the replacing of new and old electric energy meter, monitor is removed, according to the order first removing current loop, rear dismounting voltage circuit, and cleaning work is live, customary related work formality, and now the scale indicating value of monitor leaks the electricity of meter during as changing table.
Present invention is primarily targeted at during solving to change electric energy meter for a long time, leakage quantity calculation records problem that is lack of standardization or getting the brush-off.In kiowatt, size according to customer electricity load, type load, type load, type load, type load can be divided into, when client's load is less, when electric power meter classification is relatively low, change table leakage quantity calculation less, when the very big metering device classification of client's load is higher, just ratio is larger to change table leakage quantity calculation, should cause our attention.
The electric energy meter of the present invention changes table operation leakage quantity calculation monitor, and including sampling unit, control unit, communication unit and power module, control unit is connected with communication unit, and sampling unit, control unit are connected with power module respectively；Control unit includes control chip, computing module and control panel；Power module includes ct electricity-fetching module and pt electricity-fetching module, and ct electricity-fetching module is connected with sampling unit, and sampling unit includes voltage collector and current collector, and ct electricity-fetching module is by being connected with electricity incoming line and taking source to be sampling unit supply source；Pt electricity-fetching module is connected with control unit, including passive induction energy fetching device and connected rectification reduction voltage circuit, power supply supply can be provided for control unit, wherein, passive induction energy fetching device mainly includes voltage transformer, when module is installed on bus, just electric field signal can be converted to electric signal to send, and by an integrated low-loss commutator and an efficient voltage reducing type transducer, to collect the circuit coupling energy producing in environment, then this energy is converted into the output of well-tuned, provides power supply to support for subsequent components.Commutator is directly to voltage waveform rectification, passive induction energy fetching device is also connected with an external storage capacitor, it is easy to gather stable output and the self-sustaining of electric energy, can be when the ultra low quiescent current of wide hysteresis be under-voltage, electric charge is enable to accumulate on a storage capacitor, till buck converter expeditiously can send the electric charge of part storage to output, in non-loaded resting state, adjustable output voltage, continuously charges to storage capacitance simultaneously；In order to ensure the seriality and the safety that use, power module connects backup battery, and backup battery includes charged lithium cells, at ordinary times for floating charge electricity condition, can be charged by pt electricity-fetching module.
Communication unit includes wireless communication module and ethernet interface，Wireless communication module includes gprs long range propagation module and zigbee wireless communication module，Gprs long range propagation module adopts gprs dtu communication mode，Using clever flag dtu terminal，It is a kind of Internet of Things wireless data terminal，Provide the user wireless long-range data transfer function using public carrier network gprs network (also known as g net). using high performance technical grade 8/16/32 bit walk processor and technical grade wireless module，With embedded real-time operating system as software support platform，Rs232 and rs485(or rs422 is provided simultaneously) interface，Serial equipment can be directly connected to，Realize data transparent transmission function，It is internally integrated tcp/ip protocol stack，Possess gprs dial up on the telephone and tcp/ip data communication function；Serial data bi-directional conversion function is provided, can be attached with the user equipment of various use serial communications, and not need user equipment is changed；Zigbee is the low-consumption wireless LAN protocol based on ieee802.15.4 standard, it is applied to short-range wireless local transmission, communication unit can need to select different transmission means according to distance etc., electricity record data is transferred to long-range receiving terminal, as central control room or supply network, can be with the replacing of monitor in real time electric energy meter and metering state, it is to avoid loss of data brings inconvenience.
Control chip includes singlechip chip or dsp chip, in order to provide management to the control display of each element in computing module and control panel；Computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, power multiplier is connected with sampling unit, and Voltage-to-frequency Converter, frequency divider, enumerator and electric degree display-memory are connected with control chip respectively；Control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, and function button plate includes power button, reset key and keeps button, and input/output interface is connected with sampling unit；Power multiplier receiving voltage sampler and the signal of current sampler, primarily to carrying out initial storage and collect to voltage and current signal；Voltage-to-frequency Converter is connected with the gear adjustable plate of control panel, for selecting different running statuses according to different electric pressures, can realize coming into operation of whole monitor according to the control of single-chip microcomputer and power button by this module；Frequency divider and enumerator together constitute the frequency dividing sequential logic computing module of electricity calculus calculating, calculate the power information of voltage and amp product and are added up for real-time；Electric degree display-memory is connected with single-chip microcomputer, LCDs respectively, can receive the control signal of single-chip microcomputer, the reset signal of reset key and the holding signal keeping button, directly can also carry out real-time display output in LCDs.
The monitor of the present invention has the beneficial effects that the following aspects:
1, the present invention can be improved on the basis of traditional intelligent multifunction electric energy meter, conventional mounting has many functions in the multifunctional electric energy meter of client, as function of measuring when peak valley is divided equally, error connection analytic function, record maximum demand function etc., this is all unnecessary for leakage quantity calculation monitor, its corresponding component module therefore can be removed, accomplish that design components and parts are irredundant, the volume and weight of instrument thus can be reduced further, to be convenient for carrying, such monitor small volume, lightweight, wiring, take out stitches simple, fast, convenient.
2nd, the present invention, on the basis of phase meter and electric energy meter element, introduces the function of single-chip microcomputer, carries out data storage and management, it is subsequently adding some prompt operation buttons, there is beginning, the convenient operation of conclusion button, have electric energy degree to show fly back function, have data storage, parameter input inquiry function.
3rd, this instrument that the present invention designs can be to be used as the phase meter of electric energy meter, its volume and weight are similar with the phase voltammetric meter at scene or circuit tester, the Special-purpose connecting line of cooperation phase meter, clamp on amperemeter, the special secondary connection flexible circuit conductor of test electric flux, the major function of both instrument just can be had concurrently, reach the purpose of a-table-multi-purpose.
4th, the monitor of the present invention is after design molding, if can be used as the powered standard configuration instrument changing table, this supplies the legitimate rights and interests of electricity consumption both sides for effective guarantee, our routine work of specification further all benefits, this requires us to pay attention to detail in Guo Wang company, to technology, to managing the today wanting benefit, its realistic meaning is also self-evident.
Brief description
Fig. 1 is the composition structure chart of monitor of the present invention.
Fig. 2 is the composition structure chart of monitor control panel of the present invention.
Specific embodiment
Because work on the spot custom and actual conditions limit, staff often less notices that record changes the time used by table, and leak quantity calculation take family total electricity proportion little, easily ignored by us, in kiowatt, according to the size of customer electricity load, type load, type load, type load, type load can be divided into, it is now assumed that it is 0.5 hour that client's meter changes required time, different classes of electric power meter client is installed and changes table leakage quantity calculation to be fabricated to table 1 as follows:
Table 1
As shown in Table 1, when client's load is less, when electric power meter classification is relatively low, change table leakage quantity calculation less, when the very big metering device classification of client's load is higher, just ratio is larger to change table leakage quantity calculation, should cause our attention.When client for type load is, it leaks the electricity of meter and is more than 5000kwh it should cause our enough attention during changing table.
For this problem, it is proposed that powered change the Design Conception that quantity calculation monitor is leaked in table operation.This instrument must is fulfilled for following condition: small volume, lightweight, is easy to carry, wiring, take out stitches simple, quick and easy；Should have beginning, the convenient operation of conclusion button, have electric energy degree to show fly back function；Should there are data storage, parameter input inquiry function.
So, the powered table leakage quantity calculation monitor that changes designed should have portable electric meter and the major function of digital phase voltammetric meter, stopwatch and single-chip microcomputer, on the basis of phase meter and electric energy meter element, introduce the function of single-chip microcomputer, carry out data storage and management, it is provided simultaneously with prompt operation button, realize operation readiness.
Embodiment one
As shown in figure 1, electric energy meter changes table operation leakage quantity calculation monitor, including sampling unit, control unit, communication unit and power module, control unit is connected with communication unit, and sampling unit, control unit are connected with power module respectively；Control unit includes control chip, computing module and control panel, and communication unit includes wireless communication module and ethernet interface；Power module includes ct electricity-fetching module and pt electricity-fetching module, and ct electricity-fetching module is connected with sampling unit, and pt electricity-fetching module is connected with control unit；Sampling unit includes voltage collector and current collector；Control chip includes singlechip chip or dsp chip；Computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, power multiplier is connected with sampling unit, and Voltage-to-frequency Converter, frequency divider, enumerator and electric degree display-memory are connected with control chip respectively；Pt electricity-fetching module includes passive induction energy fetching device and connected rectification reduction voltage circuit.
Control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, function button plate includes power button, reset key and holding button, input/output interface is connected with sampling unit, as shown in Figure 2, introducing due to single-chip microcomputer and computing module function, data storage and management can be carried out, prompt operation button on panel, there is beginning, conclusion button is convenient to be operated, electric energy degree is had to show fly back function, there is data storage, parameter input inquiry function, the input/output interface of control panel lower end can connect special clamp on amperemeter, dedicated phase table connecting line, electricity flexible circuit conductor is surveyed in special secondary connection, bottom can also arrange various parameters of electric power value display switching keys, for becoming apparent from accurately finding required electrical parameter.
Electric energy meter changes the using method that quantity calculation monitor is leaked in table operation, comprises the steps:
1) input/output interface in monitor accesses the meter specially flexible circuit conductor with connection-peg；
2) adjust the gear adjustable plate on control panel, monitor is transformed into electric energy/kwh gear, reset instrument tolerance digital display shows clearing simultaneously；
3) according to order, the voltage parallel being changed electric energy meter voltage circuit is accessed monitor, then access monitor by parallel at terminal block for the electric current being changed electric energy meter current loop；
4) start monitor, proceed by Lou quantity calculation record, change electric energy meter simultaneously, first remove the current loop being changed electric energy meter, remove the voltage circuit being changed electric energy meter afterwards；
5) by the new electric energy meter access electric line changed, according to first accessing voltage circuit, access the order of current loop afterwards；
6) after completing the replacing of new and old electric energy meter, monitor is removed, according to the order first removing current loop, rear dismounting voltage circuit, and cleaning work is live, customary related work formality, and now the scale indicating value of monitor leaks the electricity of meter during as changing table.
It is also desirable to accomplish to see clearly operating position before coming into operation, do not touch other charging equipments；Forbid ta second open circuit, tv second short circuit and ground connection in work process；The regulation that should observe in accordance with regulation in other safety work orders；The electric energy meter of the present invention changes table operation leakage quantity calculation monitor, and including sampling unit, control unit, communication unit and power module, control unit is connected with communication unit, and sampling unit, control unit are connected with power module respectively；Control unit includes control chip, computing module and control panel；Power module includes ct electricity-fetching module and pt electricity-fetching module, and ct electricity-fetching module is connected with sampling unit, and sampling unit includes voltage collector and current collector, and ct electricity-fetching module is by being connected with electricity incoming line and taking source to be sampling unit supply source；Pt electricity-fetching module is connected with control unit, including passive induction energy fetching device and connected rectification reduction voltage circuit, power supply supply can be provided for control unit, wherein, passive induction energy fetching device mainly includes voltage transformer, when module is installed on bus, just electric field signal can be converted to electric signal to send, and by an integrated low-loss commutator and an efficient voltage reducing type transducer, to collect the circuit coupling energy producing in environment, then this energy is converted into the output of well-tuned, provides power supply to support for subsequent components.Commutator is directly to voltage waveform rectification, passive induction energy fetching device is also connected with an external storage capacitor, it is easy to gather stable output and the self-sustaining of electric energy, can be when the ultra low quiescent current of wide hysteresis be under-voltage, electric charge is enable to accumulate on a storage capacitor, till buck converter expeditiously can send the electric charge of part storage to output, in non-loaded resting state, adjustable output voltage, continuously charges to storage capacitance simultaneously；In order to ensure the seriality and the safety that use, power module connects backup battery, and backup battery includes charged lithium cells, at ordinary times for floating charge electricity condition, can be charged by pt electricity-fetching module.
Communication unit includes wireless communication module and ethernet interface，Wireless communication module includes gprs long range propagation module and zigbee wireless communication module，Gprs long range propagation module adopts gprs dtu communication mode，Using clever flag dtu terminal，It is a kind of Internet of Things wireless data terminal，Provide the user wireless long-range data transfer function using public carrier network gprs network (also known as g net). using high performance technical grade 8/16/32 bit walk processor and technical grade wireless module，With embedded real-time operating system as software support platform，Rs232 and rs485(or rs422 is provided simultaneously) interface，Serial equipment can be directly connected to，Realize data transparent transmission function，It is internally integrated tcp/ip protocol stack，Possess gprs dial up on the telephone and tcp/ip data communication function；Serial data bi-directional conversion function is provided, can be attached with the user equipment of various use serial communications, and not need user equipment is changed；Zigbee is the low-consumption wireless LAN protocol based on ieee802.15.4 standard, it is applied to short-range wireless local transmission, communication unit can need to select different transmission means according to distance etc., electricity record data is transferred to long-range receiving terminal, as central control room or supply network, can be with the replacing of monitor in real time electric energy meter and metering state, it is to avoid loss of data brings inconvenience.
Control chip includes singlechip chip or dsp chip, in order to provide management to the control display of each element in computing module and control panel；Computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, power multiplier is connected with sampling unit, and Voltage-to-frequency Converter, frequency divider, enumerator and electric degree display-memory are connected with control chip respectively；Control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, and function button plate includes power button, reset key and keeps button, and input/output interface is connected with sampling unit；Power multiplier receiving voltage sampler and the signal of current sampler, primarily to carrying out initial storage and collect to voltage and current signal；Voltage-to-frequency Converter is connected with the gear adjustable plate of control panel, for different running statuses are selected according to different electric pressures, gear adjustable plate can meet the needs requirement of different metering methods, voltage 50v to 380v all can correctly measure, coming into operation of whole monitor can be realized according to the control of single-chip microcomputer and power button by Voltage-to-frequency Converter；Frequency divider and enumerator together constitute the frequency dividing sequential logic computing module of electricity calculus calculating, calculate the power information of voltage and amp product and are added up for real-time；Electric degree display-memory is connected with single-chip microcomputer, LCDs respectively, can receive the control signal of single-chip microcomputer, the reset signal of reset key and the holding signal keeping button, directly can also carry out real-time display output in LCDs.
The present invention can be improved on the basis of traditional intelligent multifunction electric energy meter, conventional mounting has many functions in the multifunctional electric energy meter of client, as function of measuring, error connection analytic function, record maximum demand function etc. when peak valley is divided equally, this is all unnecessary for leakage quantity calculation monitor, its corresponding component module therefore can be removed, accomplish that design components and parts are irredundant, the volume and weight of instrument thus can be reduced further, to be convenient for carrying, such monitor small volume, lightweight, wiring, take out stitches simple, quick and easy.
Embodiment two
Electric energy meter changes table operation leakage quantity calculation monitor, and including sampling unit, control unit, communication unit and power module, control unit is connected with communication unit, and sampling unit, control unit are connected with power module respectively；Control unit includes control chip, computing module and control panel, and communication unit includes wireless communication module and ethernet interface；Power module includes ct electricity-fetching module and pt electricity-fetching module, and ct electricity-fetching module is connected with sampling unit, and pt electricity-fetching module is connected with control unit；Sampling unit includes voltage collector and current collector；Control chip includes singlechip chip or dsp chip；Computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, power multiplier is connected with sampling unit, and Voltage-to-frequency Converter, frequency divider, enumerator and electric degree display-memory are connected with control chip respectively；Pt electricity-fetching module includes passive induction energy fetching device and connected rectification reduction voltage circuit；Control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, and function button plate includes power button, reset key and keeps button, and input/output interface is connected with sampling unit.
On the basis of embodiment one, pt electricity-fetching module connects backup battery, backup battery connects external charged lithium cells, as during line outage in short-term back-up source use, it is floating charge electricity condition at ordinary times, is powered by pt electricity-fetching module, be thus provided with pt power taking back-up source and support function, ensure that the sustainability of equipment work, it is to avoid the occurrence of equipment owes electricity.
Claims (9)
1. electric energy meter changes table operation leakage quantity calculation monitor, it is characterized in that: include sampling unit, control unit, communication unit and power module, described control unit is connected with described communication unit, and described sampling unit, described control unit are connected with described power module respectively；Described control unit includes control chip, computing module and control panel, and described communication unit includes wireless communication module and ethernet interface.
2. electric energy meter as claimed in claim 1 changes table operation leakage quantity calculation monitor, it is characterized in that: described power module includes ct electricity-fetching module and pt electricity-fetching module, described ct electricity-fetching module is connected with described sampling unit, and described pt electricity-fetching module is connected with described control unit.
3. electric energy meter as claimed in claim 1 change table operation leakage quantity calculation monitor it is characterised in that: described sampling unit includes voltage collector and current collector.
4. electric energy meter as claimed in claim 1 change table operation leakage quantity calculation monitor it is characterised in that: described control chip includes singlechip chip or dsp chip.
5. electric energy meter as claimed in claim 1 changes table operation leakage quantity calculation monitor, it is characterized in that: described computing module includes power multiplier, Voltage-to-frequency Converter, frequency divider, enumerator and the electric degree display-memory being sequentially connected with, described power multiplier is connected with described sampling unit, and described Voltage-to-frequency Converter, described frequency divider, described enumerator and described electric degree display-memory are connected with described control chip respectively.
6. electric energy meter as claimed in claim 1 changes table operation leakage quantity calculation monitor, it is characterized in that: described control panel includes LCDs, function button plate, gear adjustable plate and input/output interface, described function button plate includes power button, reset key and keeps button, and described input/output interface is connected with described sampling unit.
7. electric energy meter as claimed in claim 2 change table operation leakage quantity calculation monitor it is characterised in that: described pt electricity-fetching module includes passive induction energy fetching device and connected rectification reduction voltage circuit.
8. electric energy meter as claimed in claim 1 or 2 change table operation leakage quantity calculation monitor it is characterised in that: described power module connects backup battery, and described backup battery includes charged lithium cells.
9. electric energy meter changes the using method of table operation leakage quantity calculation monitor it is characterised in that comprising the steps:
1) input/output interface in monitor accesses the meter specially flexible circuit conductor with connection-peg；
2) adjust the gear adjustable plate on control panel, monitor is transformed into electric energy/kwh gear, reset instrument tolerance digital display shows clearing simultaneously；
3) according to order, the voltage parallel being changed electric energy meter voltage circuit is accessed monitor, then access monitor by parallel at terminal block for the electric current being changed electric energy meter current loop；
4) start monitor, proceed by Lou quantity calculation record, change electric energy meter simultaneously, first remove the current loop being changed electric energy meter, remove the voltage circuit being changed electric energy meter afterwards；
5) by the new electric energy meter access electric line changed, according to first accessing voltage circuit, access the order of current loop afterwards；
6) after completing the replacing of new and old electric energy meter, monitor is removed, according to the order first removing current loop, rear dismounting voltage circuit, and cleaning work is live, customary related work formality, and now the scale indicating value of monitor leaks the electricity of meter during as changing table.
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| CN109541300A (en) * | 2019-01-10 | 2019-03-29 | 国网青海省电力公司电力科学研究院 | A kind of the Analysis of energy metering instrument and its application method of count by time sharing |
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| CN114113723A (en) * | 2021-11-19 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Electric energy meter live-line replacement method and device without electric quantity loss |
| CN114325012A (en) * | 2021-12-21 | 2022-04-12 | 安徽南瑞中天电力电子有限公司 | Low-voltage side uninterrupted meter changing device and meter changing operation method thereof |
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| CN104574915A (en) * | 2015-01-23 | 2015-04-29 | 国家电网公司 | Carrier type power acquisition equipment and carrier test equipment thereof |
| CN104574915B (en) * | 2015-01-23 | 2018-03-23 | 国家电网公司 | A kind of carrier system electric power acquisition equipment and its carrier test equipment |
| CN107703356A (en) * | 2017-09-30 | 2018-02-16 | 国网河南省电力公司濮阳供电公司 | A kind of intelligent electric energy meter with voice broadcast function |
| CN109001511A (en) * | 2018-08-29 | 2018-12-14 | 南京觅丹电子信息有限公司 | A kind of micro- ammeter |
| CN109541300A (en) * | 2019-01-10 | 2019-03-29 | 国网青海省电力公司电力科学研究院 | A kind of the Analysis of energy metering instrument and its application method of count by time sharing |
| CN110768378A (en) * | 2019-10-29 | 2020-02-07 | 广州供电局有限公司 | Measurement load control terminal |
| CN111474396A (en) * | 2020-04-23 | 2020-07-31 | 国网天津市电力公司 | Electric energy meter with electric meter changing function |
| CN113075449A (en) * | 2021-03-26 | 2021-07-06 | 国网江苏省电力有限公司镇江供电分公司 | Portable electric quantity measuring instrument |
| CN114113723A (en) * | 2021-11-19 | 2022-03-01 | 云南电网有限责任公司电力科学研究院 | Electric energy meter live-line replacement method and device without electric quantity loss |
| CN114325012A (en) * | 2021-12-21 | 2022-04-12 | 安徽南瑞中天电力电子有限公司 | Low-voltage side uninterrupted meter changing device and meter changing operation method thereof |
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