CN106370926A - Missing electric quantity recorder for electric energy meter changing work and using method thereof - Google Patents

Abstract

The invention discloses an electric energy recorder for electric energy meter replacement operation and a use method thereof, including a sampling unit, a control unit, a communication unit and a power supply module, the control unit is connected with the communication unit, the sampling unit, the control unit The units are respectively connected to the power supply module; the control unit includes a control chip, a computing module and a control panel, and the communication unit includes a wireless communication module and an Ethernet communication interface. The present invention improves on the basis of the traditional intelligent multi-functional electric energy meter, introduces the function of the single chip microcomputer on the basis of the phase meter and electric energy meter components, carries out data storage and management, and then adds some shortcut keys to achieve the design element There is no redundancy in the device, so that the volume and weight of the instrument can be further reduced to facilitate portability. Such a recorder is small in size and light in weight, and the wiring and unwiring are simple, fast and convenient.

Description

Leakage electricity recorder and usage method for electric energy meter replacement operation

technical field

The invention relates to the technical field of electric energy meter auxiliary operation equipment, in particular to an electric energy recorder for electric energy meter replacement operation and a usage method thereof.

Background technique

The energy meter verification regulation stipulates that the installed energy meter has a certain operating cycle, and must be forced to rotate when it expires. In order to ensure the reliability of the power supply for the electric energy meter connected with the terminal through the transformer, it is generally adopted to replace the meter with electricity. In this way, a problem arises, that is, how to calculate the amount of electricity missed during the meter change. In this regard, we usually use the watt-second method, that is, write down the power of the corresponding line before changing the meter, and record the time used for changing the meter after the meter is changed, and calculate the leakage power according to the formula W=P×t. Among them, W is the leakage electric energy during the meter change, P is the line power before the meter change, and t is the time used for the meter change. This method of calculating the power during the meter change appears to be theoretically feasible, but in fact has a lot of defects. The reasons are as follows: firstly, it is difficult to obtain the power P of the road accurately due to the limitation of the site conditions; secondly, this formula can only be used when the power is constant It can only be used under the same condition, but in fact, the user load changes within a certain range, so it is not scientific to replace the average power with the instantaneous power at a certain moment of the line. If you want to get accurate power, the correct expression of leakage power Should be: , that is, the integral of the instantaneous power and time of the leakage meter line; at the same time, it is not easy to determine the meter replacement time t, mainly due to the on-site work habits and specific conditions, the staff often pay little attention to recording the time used for meter replacement, Finally, when dealing with the work ticket for changing the meter, the additional power during the meter changing period can only be estimated based on experience, and there must be a certain difference from the real missing power.

The patent application number is 201410125460.7 provides a power record analyzer, including: the front collector and the host of the upper control analysis machine are set in an all-aluminum-magnesium alloy chassis, and the liquid crystal display of the upper control analysis machine and the chassis are arranged in an outward structure. Outside the case, the liquid crystal display is connected to the side edge of the top cover of the case through the rotating shaft, and the liquid crystal display is connected to the host through the data line in the rotating shaft; the outer surface of the top cover of the case is provided with a keyboard and mouse touch screen connected to the main frame board, the depth of the concave of the display screen of the liquid crystal display is greater than the height of the keyboard; the rear side wall of the above-mentioned case is provided with a signal collection interface corresponding to the front collector, and the side wall of the case is provided with a power supply interface between the front collector and the host , and the external interface of the corresponding host. The invention solves the problems of poor communication stability and inconvenient use of the electric quantity (waveform) record analyzer with a separate structure, and improves the performance of the equipment.

The patent with application number 201320293295.7 relates to a power record analyzer, including a casing and a power record analysis circuit installed in the case; the power record analysis circuit includes a data measurement circuit and a data processing circuit electrically connected to each other; the The data measurement circuit has a plurality of data measurement interfaces, and each data measurement interface is respectively connected with a soft signal line and an open-type miniature current transformer in sequence. The electric quantity record analyzer provided by the embodiment of the present invention combines the data measurement circuit and the data processing circuit, which is convenient for general household use; the data measurement process does not need to change the original wiring, which is safe and reliable.

However, the above schemes all calculate, record and analyze the conventional electricity, and there is no special instrument or method for accurately recording the leakage electricity during the meter replacement operation. Therefore, we propose a live meter replacement The design idea of the leakage meter electricity recorder.

Contents of the invention

The object of the present invention is to provide an electric energy meter replacement operation leak meter electricity recorder and its use method, which are small in size, light in weight, easy to carry, can be intuitively operated through the control button interface, and have data storage and query functions.

In order to achieve the above object, the technical solution adopted by the present invention is: a meter replacement operation leakage meter electricity recorder, including a sampling unit, a control unit, a communication unit and a power module, the control unit is connected to the communication unit, the The sampling unit and the control unit are respectively connected to the power module; the control unit includes a control chip, a computing module and a control panel, and the communication unit includes a wireless communication module and an Ethernet communication interface.

The power supply module includes a CT power-taking module and a PT power-taking module, the CT power-taking module is connected to the sampling unit, and the PT power-taking module is connected to the control unit.

The sampling unit includes a voltage collector and a current collector.

The control chip includes a single-chip microcomputer chip or a DSP chip.

The calculation module includes a power multiplier, a voltage-frequency converter, a frequency divider, a counter and an electric degree display memory connected in sequence, the power multiplier is connected with the sampling unit, the voltage-frequency converter, the The frequency divider, the counter and the electricity display memory are respectively connected with the control chip.

The control panel includes a liquid crystal display, a function button board, a gear adjustment board and an input and output interface. The function button board includes a power button, a reset button and a hold button, and the input and output interface is connected to the sampling unit.

The PT power-taking module includes a passive inductive energy-taking device and a rectification and step-down circuit connected thereto.

The power module is connected to a backup battery, and the backup battery includes a rechargeable lithium battery.

The method of using the meter-replacing meter leakage electricity recorder includes the following steps:

1) Connect the special instrument soft wire with plug connector to the input and output interface of the recorder;

2) Adjust the gear adjustment plate on the control panel, switch the recorder to the electric energy/kWh gear, and reset the instrument’s degree display to zero at the same time;

3) In order, connect the voltage of the voltage circuit of the replaced electric energy meter to the recorder in parallel, and then connect the current of the current circuit of the electric energy meter to be replaced to the recorder in parallel at the terminal block;

4) Start the recorder, start recording the leakage meter, and replace the electric energy meter at the same time, first remove the current circuit of the replaced electric energy meter, and then remove the voltage circuit of the replaced electric energy meter;

5) Connect the newly replaced watt-hour meter into the power line, in the order of connecting to the voltage circuit first, and then connecting to the current circuit;

6) After the replacement of the old and new electric energy meters is completed, remove the recorder, follow the sequence of removing the current loop first, and then remove the voltage loop, and clean up the work site, and perform routine related work procedures. At this time, the meter indication value of the recorder is The amount of electricity that was leaked during meter replacement.

The main purpose of the present invention is to solve the problem of non-standard or under-appreciated records of leakage electricity in the process of replacing electric energy meters for a long time. In the power unit, according to the size of the customer's electricity load, it can be divided into Class I load, Class II load, Class III load, and Class IV load. The electricity is not large, and when the customer load is heavy and the category of the metering device is high, the amount of meter leakage will be relatively large, which should arouse our attention.

The electric energy recorder for electric energy meter replacement operation of the present invention includes a sampling unit, a control unit, a communication unit and a power supply module, the control unit is connected to the communication unit, and the sampling unit and the control unit are respectively connected to the power supply module; the control unit includes a control chip , calculation module and control panel; the power supply module includes CT power-taking module and PT power-taking module, CT power-taking module is connected with sampling unit, sampling unit includes voltage collector and current collector, CT power-taking module is connected with power input line And take the source as the source of the sampling unit; the PT power-taking module is connected to the control unit, including the passive induction energy-taking device and the rectification and step-down circuit connected to it, which can provide power supply for the control unit. Among them, the passive induction energy-taking device It mainly includes a voltage transformer. When the module is installed on the bus, it can convert the electric field signal into an electrical signal for transmission, and integrate a low-loss rectifier and a high-efficiency step-down converter to collect the line coupling generated in the environment. energy, which is then converted into a well-regulated output that provides power support for subsequent components. The rectifier directly rectifies the voltage waveform, and the passive induction energy harvesting device is also connected to an external storage capacitor, which facilitates the stable output and self-maintenance of electric energy collection, and enables the charge to be stored in the storage capacitor when the ultra-low quiescent current with wide hysteresis is undervoltage Accumulate on the top until the step-down converter can efficiently transfer a part of the stored charge to the output. In the no-load sleep state, the output voltage can be adjusted while continuously charging the storage capacitor; in order to ensure the continuity and safety of use The power module is connected to the backup battery. The backup battery includes a rechargeable lithium battery. It is usually in a floating state and can be charged through the PT power-taking module.

The communication unit includes a wireless communication module and an Ethernet communication interface. The wireless communication module includes a GPRS long-distance transmission module and a zigbee wireless communication module. The GPRS long-distance transmission module adopts GPRS DTU communication mode and Lingqi DTU terminal. The data terminal uses the public operator network GPRS network (also known as G network) to provide users with wireless long-distance data transmission functions. It adopts high-performance industrial-grade 8/16/32-bit communication processors and industrial-grade wireless modules, embedded The real-time operating system is a software support platform, and provides RS232 and RS485 (or RS422) interfaces at the same time, which can be directly connected to serial devices to realize transparent data transmission function, internally integrates TCP/IP protocol stack, and has GPRS dial-up Internet access and TCP/IP data communication. Function; provide serial data two-way conversion function, can be connected with various user equipment using serial communication, and does not need to make changes to user equipment; Zigbee is a low-power wireless LAN protocol based on IEEE802.15.4 standard, suitable for short distance The wireless local area transmission, the communication unit can choose different transmission methods according to the distance and other needs, and transmit the power record data to the remote receiving end, such as the central control room or power supply network, which can monitor the replacement and measurement status of the electric energy meter in real time to avoid Data loss is an inconvenience.

The control chip includes a single-chip microcomputer chip or a DSP chip, which is used to provide management for each component in the calculation module and the control display of the control panel; the calculation module includes a sequentially connected power multiplier, voltage-frequency converter, frequency divider, counter and electric The power multiplier is connected to the sampling unit, and the voltage frequency converter, frequency divider, counter and power display memory are respectively connected to the control chip; the control panel includes a liquid crystal display, a function key board, a gear adjustment board and an input The output interface, the function button board includes the power button, the reset button and the hold button, and the input and output interfaces are connected to the sampling unit; the power multiplier receives the signals of the voltage sampler and the current sampler, mainly for the initial storage and processing of the voltage and current signals. Collection; the voltage frequency converter is connected with the gear adjustment board of the control panel, which is used to select different operating states according to different voltage levels. Through this module, the entire recorder can be put into use according to the control of the single-chip microcomputer and the power button. ; The frequency divider and the counter together constitute the frequency division sequential logic calculation module for calculus calculation of electricity, which is used to calculate and accumulate the power information of the product of voltage and current in real time; Receive the control signal of the single-chip microcomputer, the reset signal of the reset button and the hold signal of the hold button, and can also directly perform real-time display output on the liquid crystal display.

The recorder of the present invention has beneficial effects in the following aspects:

1. The present invention can be improved on the basis of the traditional intelligent multifunctional electric energy meter. The traditional multifunctional electric energy meter installed on the client side has many functions, such as peak and valley equivalence measurement function, wrong wiring analysis function, and maximum demand recording Functions, etc., which are unnecessary for the leakage meter electricity recorder, so the corresponding component modules can be removed, so that there is no redundancy in the design components, so that the volume and weight of the meter can be further reduced, and the Easy to carry, such a recorder is small in size, light in weight, simple, fast and convenient in wiring and disconnecting.

2. On the basis of the phase meter and electric energy meter components, the present invention introduces the function of a single-chip microcomputer for data storage and management, and then adds some quick operation buttons, with start and end buttons for easy operation, and the function of quickly returning to zero for the electric energy display. It has data storage and parameter input query functions.

3. The instrument designed by the present invention can be a phase meter used as an electric energy meter. Its volume and weight are similar to phase voltammeters or multimeters used on the spot. Cooperate with the special connecting wire of the phase meter, clamp ammeter, and test electric meter. The special secondary connection soft wire for energy can have the main functions of these two instruments concurrently, so as to achieve the multi-purpose purpose of one meter.

4. After the recorder of the present invention is designed and formed, if it can be used as a standard meter for live meter replacement, it will be of great benefit to effectively protecting the legitimate rights and interests of both power supply and consumption parties and further standardizing our daily work. The company requires us to pay attention to details and seek benefits from technology and management, and its practical significance is self-evident.

Description of drawings

Fig. 1 is a composition structure diagram of the recorder of the present invention.

Fig. 2 is a structural diagram of the control panel of the recorder of the present invention.

detailed description

Due to on-site work habits and specific conditions, the staff often do not pay much attention to recording the time used for meter replacement, and the proportion of the missing metered electricity to the total electricity of the user is not large, which is easily overlooked by us. In the power unit, according to the customer's electricity load The size of the load can be divided into class I load, class II load, class III load, and class IV load. Now assume that the time required for customer meter replacement is 0.5 hours, and the customer who installs different types of electric energy metering devices will make a table 1 as follows:

Table 1

It can be seen from Table 1 that when the customer load is small and the category of the electric energy metering device is low, the leakage of meter replacement is not large. Our attention. When the customer is a Class I load, the electricity missed during meter replacement is greater than 5000kWh, which should arouse our sufficient attention.

Aiming at this problem, we propose the design idea of the meter leakage electricity recorder for the live meter replacement operation. This kind of instrument must meet the following conditions: small size, light weight, easy to carry, simple, fast and convenient to connect and unplug; it should have start and end buttons for easy operation, and it should have the function of quick return to zero for electric energy display; it should have data storage, Parameter input query function.

Therefore, the designed electricity recorder should have the main functions of portable electric energy meter, digital phase voltammeter, stopwatch and single-chip microcomputer. Data storage and management, as well as shortcut buttons for convenient operation.

Embodiment one

As shown in Figure 1, the electric energy recorder for meter replacement operation includes a sampling unit, a control unit, a communication unit, and a power module. The control unit is connected to the communication unit, and the sampling unit and the control unit are respectively connected to the power module; the control unit Including control chip, computing module and control panel, communication unit includes wireless communication module and Ethernet communication interface; power supply module includes CT power-taking module and PT power-taking module, CT power-taking module is connected with sampling unit, PT power-taking module Unit connection; the sampling unit includes a voltage collector and a current collector; the control chip includes a single-chip microcomputer chip or a DSP chip; the calculation module includes a power multiplier, a voltage-frequency converter, a frequency divider, a counter and an electric degree display memory connected in sequence, The power multiplier is connected to the sampling unit, and the voltage-frequency converter, frequency divider, counter and energy display memory are respectively connected to the control chip; the PT power-taking module includes a passive induction energy-taking device and a rectification and step-down circuit connected to it.

The control panel includes a liquid crystal display, a function button board, a gear adjustment board and an input and output interface. The function button board includes a power button, a reset button and a hold button. The input and output interfaces are connected to the sampling unit, as shown in Figure 2. The introduction of the calculation module function can be used for data storage and management. The shortcut keys on the panel have start and end buttons for easy operation, and the function of quickly returning to zero for the electric energy display, data storage, and parameter input query functions. The bottom of the control panel The input and output interfaces can be connected to a dedicated clamp ammeter, a dedicated phase meter connection line, and a dedicated secondary connection measuring soft wire. At the bottom, various power parameter value display switching buttons can be set to find the required power parameters more clearly and accurately.

The method of using the meter-replacing meter leakage electricity recorder includes the following steps:

1) Connect the special instrument soft wire with plug connector to the input and output interface of the recorder;

2) Adjust the gear adjustment plate on the control panel, switch the recorder to the electric energy/kWh gear, and reset the instrument’s degree display to zero at the same time;

3) In order, connect the voltage of the voltage circuit of the replaced electric energy meter to the recorder in parallel, and then connect the current of the current circuit of the electric energy meter to be replaced to the recorder in parallel at the terminal block;

4) Start the recorder, start recording the leakage meter, and replace the electric energy meter at the same time, first remove the current circuit of the replaced electric energy meter, and then remove the voltage circuit of the replaced electric energy meter;

5) Connect the newly replaced watt-hour meter into the power line, in the order of connecting to the voltage circuit first, and then connecting to the current circuit;

6) After the replacement of the old and new electric energy meters is completed, remove the recorder, follow the sequence of removing the current loop first, and then remove the voltage loop, and clean up the work site, and perform routine related work procedures. At this time, the meter indication value of the recorder is The amount of electricity that was leaked during meter replacement.

Before putting it into use, it is also necessary to recognize the working position and not touch other live equipment; TA secondary open circuit, TV secondary short circuit and grounding are prohibited during the working process; comply with the regulations that should be observed in other safety work regulations; the present invention The power meter replacement operation leakage meter electricity recorder includes a sampling unit, a control unit, a communication unit and a power module. The control unit is connected to the communication unit, and the sampling unit and the control unit are respectively connected to the power module. module and control panel; the power supply module includes a CT power-taking module and a PT power-taking module, and the CT power-taking module is connected with a sampling unit, and the sampling unit includes a voltage collector and a current collector. The source is the source for the sampling unit; the PT power-taking module is connected to the control unit, including a passive induction energy-taking device and a rectification and step-down circuit connected to it, which can provide power supply for the control unit. Among them, the passive induction energy-taking device mainly includes The voltage transformer, when the module is installed on the bus, can convert the electric field signal into an electrical signal for transmission, and integrate a low-loss rectifier and a high-efficiency step-down converter to collect the line coupling energy generated in the environment, This energy is then converted into a well-regulated output that provides power to subsequent components. The rectifier directly rectifies the voltage waveform, and the passive induction energy harvesting device is also connected to an external storage capacitor, which facilitates the stable output and self-maintenance of electric energy collection, and enables the charge to be stored in the storage capacitor when the ultra-low quiescent current with wide hysteresis is undervoltage Accumulate on the top until the step-down converter can efficiently transfer a part of the stored charge to the output. In the no-load sleep state, the output voltage can be adjusted while continuously charging the storage capacitor; in order to ensure the continuity and safety of use The power module is connected to the backup battery. The backup battery includes a rechargeable lithium battery. It is usually in a floating state and can be charged through the PT power-taking module.

The communication unit includes a wireless communication module and an Ethernet communication interface. The wireless communication module includes a GPRS long-distance transmission module and a zigbee wireless communication module. The GPRS long-distance transmission module adopts GPRS DTU communication mode and Lingqi DTU terminal. The data terminal uses the public operator network GPRS network (also known as G network) to provide users with wireless long-distance data transmission functions. It adopts high-performance industrial-grade 8/16/32-bit communication processors and industrial-grade wireless modules, embedded The real-time operating system is a software support platform, and provides RS232 and RS485 (or RS422) interfaces at the same time, which can be directly connected to serial devices to realize transparent data transmission function, internally integrates TCP/IP protocol stack, and has GPRS dial-up Internet access and TCP/IP data communication. Function; provide serial data two-way conversion function, can be connected with various user equipment using serial communication, and does not need to make changes to user equipment; Zigbee is a low-power wireless LAN protocol based on IEEE802.15.4 standard, suitable for short distance The wireless local area transmission, the communication unit can choose different transmission methods according to the distance and other needs, and transmit the power record data to the remote receiving end, such as the central control room or power supply network, which can monitor the replacement and measurement status of the electric energy meter in real time to avoid Data loss is an inconvenience.

The control chip includes a single-chip microcomputer chip or a DSP chip, which is used to provide management for each component in the calculation module and the control display of the control panel; the calculation module includes a sequentially connected power multiplier, voltage-frequency converter, frequency divider, counter and electric The power multiplier is connected to the sampling unit, and the voltage frequency converter, frequency divider, counter and power display memory are respectively connected to the control chip; the control panel includes a liquid crystal display, a function key board, a gear adjustment board and an input The output interface, the function button board includes the power button, the reset button and the hold button, and the input and output interfaces are connected to the sampling unit; the power multiplier receives the signals of the voltage sampler and the current sampler, mainly for the initial storage and processing of the voltage and current signals. Collection; the voltage frequency converter is connected with the gear adjustment board of the control panel, which is used to select different operating states according to different voltage levels. The gear adjustment board can meet the needs of different metering methods, and the voltage from 50V to 380V can be correct. Metering, through the voltage-frequency converter, the whole recorder can be put into use according to the control of the single-chip microcomputer and the power button; the frequency divider and the counter together constitute a frequency-division sequential logic calculation module for power calculus calculation, which is used to calculate the voltage in real time The power information multiplied by the current is accumulated; the energy display memory is connected to the single-chip microcomputer and the LCD screen respectively, and can receive the control signal of the single-chip microcomputer, the reset signal of the reset button and the hold signal of the hold button, and can also be directly displayed on the LCD screen. Perform real-time display output.

The present invention can be improved on the basis of the traditional intelligent multi-functional electric energy meter. The traditional multi-functional electric energy meter installed on the client side has many functions, such as peak-valley equivalence measurement function, wrong wiring analysis function, maximum demand recording function, etc. etc., this is not necessary for the leakage meter electricity recorder, so its corresponding component modules can be removed to make the design components without redundancy, so that the volume and weight of the meter can be further reduced for easy portability , Such a recorder is small in size, light in weight, simple, fast and convenient in wiring and disconnecting.

Embodiment two

Electric energy recorder for meter replacement operation, including sampling unit, control unit, communication unit and power module, the control unit is connected to the communication unit, and the sampling unit and control unit are respectively connected to the power module; the control unit includes a control chip and a computing module and the control panel, the communication unit includes a wireless communication module and an Ethernet communication interface; the power module includes a CT power-taking module and a PT power-taking module, the CT power-taking module is connected to the sampling unit, and the PT power-taking module is connected to the control unit; the sampling unit includes Voltage collector and current collector; control chip includes single-chip microcomputer chip or DSP chip; calculation module includes sequentially connected power multiplier, voltage-frequency converter, frequency divider, counter and energy display memory, power multiplier and sampling unit Connection, the voltage frequency converter, frequency divider, counter and electric degree display memory are respectively connected to the control chip; the PT power-taking module includes passive induction energy-taking devices and a rectification and step-down circuit connected to it; the control panel includes a liquid crystal display, A function key board, a gear adjustment board and an input and output interface. The function key board includes a power button, a reset button and a hold button, and the input and output interfaces are connected to the sampling unit.

On the basis of Embodiment 1, the PT power-taking module is connected to the backup battery, and the backup battery is connected to an external rechargeable lithium battery, which is used as a short-term backup power supply when the line is powered off. It is usually in a floating charging state and powered by the PT power-taking module. With the support function of PT power-taking backup power supply, it ensures the continuity of equipment work and avoids the occurrence of equipment power shortage.

Claims (9)

1. Electric energy meter replacement operation leakage meter electric quantity recorder, it is characterized in that: comprise sampling unit, control unit, communication unit and power supply module, described control unit is connected with described communication unit, described sampling unit, described control unit They are respectively connected to the power supply module; the control unit includes a control chip, a computing module and a control panel, and the communication unit includes a wireless communication module and an Ethernet communication interface. 2. The electric energy recorder for electric energy meter replacement operation leakage metering as claimed in claim 1, characterized in that: the power supply module includes a CT power-taking module and a PT power-taking module, and the CT power-taking module and the sampling unit connected, the PT power-taking module is connected with the control unit. 3. The electric energy recorder for electric energy meter replacement operation leakage meter according to claim 1, characterized in that: the sampling unit includes a voltage collector and a current collector. 4. The electric energy recorder for electricity meter replacement operation leakage meter according to claim 1, characterized in that: said control chip comprises a single-chip microcomputer chip or a DSP chip. 5. The electric energy recorder for meter replacement operation leakage metering as claimed in claim 1, characterized in that: the calculation module includes a power multiplier, a voltage-frequency converter, a frequency divider, a counter and an electric degree connected in sequence display memory, the power multiplier is connected to the sampling unit, and the voltage frequency converter, the frequency divider, the counter and the electricity display memory are respectively connected to the control chip. 6. The electric energy recorder for electric energy meter replacement operation leakage metering as claimed in claim 1, characterized in that: the control panel includes a liquid crystal display, a function button board, a gear adjustment board and an input and output interface, and the function buttons The board includes a power button, a reset button and a hold button, and the input and output interfaces are connected with the sampling unit. 7. The electric energy recorder for electric energy meter replacement operation leakage meter according to claim 2, characterized in that: said PT power acquisition module includes a passive inductive energy acquisition device and a rectification and voltage reduction circuit connected thereto. 8. The electric energy recorder for electric energy meter replacement operation leakage meter according to claim 1 or 2, characterized in that: the power module is connected to a backup battery, and the backup battery includes a rechargeable lithium battery. 9. The method of using the meter-replacing operation of the electric energy meter leakage meter electricity recorder is characterized in that it includes the following steps: 1) Connect the special instrument soft wire with plug connector to the input and output interface of the recorder; 2) Adjust the gear adjustment plate on the control panel, switch the recorder to the electric energy/kWh gear, and reset the instrument’s degree display to zero at the same time; 3) In order, connect the voltage of the voltage circuit of the replaced electric energy meter to the recorder in parallel, and then connect the current of the current circuit of the electric energy meter to be replaced to the recorder in parallel at the terminal block; 4) Start the recorder, start recording the leakage meter, and replace the electric energy meter at the same time, first remove the current circuit of the replaced electric energy meter, and then remove the voltage circuit of the replaced electric energy meter; 5) Connect the newly replaced watt-hour meter into the power line, in the order of connecting to the voltage circuit first, and then connecting to the current circuit; 6) After the replacement of the old and new electric energy meters is completed, remove the recorder, follow the sequence of removing the current loop first, and then remove the voltage loop, and clean up the work site, and perform routine related work procedures. At this time, the meter indication value of the recorder is The amount of electricity that was leaked during meter replacement.