An electricity meter

Abstract

This utility model relates to the field of smart energy meter technology and discloses an energy meter comprising: a wide-voltage power supply module, a metering main control module, and a tripping control module. The wide-voltage power supply module's input terminal collects external voltage; its first output terminal is connected to the first power supply terminals of both the metering main control module and the tripping control module; its second output terminal is connected to the second power supply terminals of both the metering main control module and the tripping control module. The metering main control module's first input terminal collects the operating current signal of the tripping control module; its second input terminal collects the grid voltage signal; and its output terminal is connected to the control terminal of the tripping control module. This utility model can prevent system shutdown under extreme conditions such as low voltage, solve the problem of tripping failure caused by insufficient instantaneous power supply, and improve operational reliability.

Description

Technical Field

[0001] This utility model relates to the field of smart energy meter technology, and specifically to an energy meter. Background Technology

[0002] Existing 2P rail meters typically employ a flyback switching power supply solution, with their core control chip mostly being a general-purpose pulse width modulation (PWM) controller. These ICs are designed primarily to meet cost-effectiveness and typical application environments. Their internal undervoltage lockout circuits typically have start-up and shutdown thresholds set at tens to tens of volts on the DC side, corresponding to a lower limit of approximately 100VAC to 120VAC for the AC input voltage.

[0003] Its operating logic is as follows: After rectification and filtering, the AC power supplies the switching power supply. Under normal voltage (e.g., 220VAC), the power supply IC operates, outputting a stable +5V through transformer coupling to power the metering control chip and +12V to power the relay drive circuit. When it is necessary to open or close the circuit, the control chip issues a command to control the H-bridge circuit composed of MOSFETs, applying the energy from the +12V power supply in pulse form to the coil of the magnetic latching relay, thus changing its state.

[0004] While this existing technology can operate reliably when the grid voltage is normal, it was not originally designed for ultra-low voltage conditions. Its overall technical level remains at the level of "meeting normal use," and its reliability faces severe challenges once the grid experiences anomalies, such as a sudden voltage drop at the end of a long-distance transmission line or a temporary drop caused by the start-up of large equipment. Utility Model Content

[0005] This invention provides an electricity meter to solve the problem that existing electricity meters cannot operate continuously and reliably under extreme voltages.

[0006] This utility model provides an electricity meter, comprising: a wide-voltage power supply module, a metering main control module, and a circuit breaker control module. The wide-voltage power supply module's input terminal acquires external voltage. Its first output terminal is connected to the first power supply terminals of both the metering main control module and the circuit breaker control module. Its second output terminal is also connected to both the second power supply terminals of the metering main control module and the circuit breaker control module. The wide-voltage power supply module converts the external voltage level to output a first power supply voltage, stores the first power supply voltage, and then converts it to a second power supply voltage for output. The metering main control module's first input terminal acquires the operating current signal of the circuit breaker control module, and its second input terminal acquires the grid voltage signal. Its output terminal is connected to the control terminal of the circuit breaker control module. The metering main control module controls the circuit breaker control module to operate based on either the first or second power supply voltage, according to the magnitude of the grid voltage signal.

[0007] The energy meter provided by this utility model has two main advantages. First, the wide-voltage power supply module can collect external voltage fluctuations, converting them into a first supply voltage to directly power the metering control module and the circuit breaker control module. It can also store the first supply voltage and convert it into a second supply voltage for backup, effectively overcoming the limitation of the narrow power supply range of traditional energy meters and preventing system shutdown due to sudden voltage drops or low voltage conditions. Second, the metering control module, by collecting the operating current signal and grid voltage signal of the circuit breaker control module, can control the circuit breaker control module to switch to the first or second supply voltage based on the grid voltage signal magnitude. This completely solves the problem of circuit breaker failure caused by insufficient instantaneous power supply under low voltage conditions in traditional solutions. Simultaneously, the stable power supply provided by the wide-voltage power supply module, combined with its precise electrical parameter acquisition and calculation capabilities, ensures continuous, accurate, and error-free metering data. The overall solution simplifies the circuit architecture, adapts to miniaturized designs, and significantly improves the operational reliability, control effectiveness, and metering accuracy of the energy meter under complex grid conditions, effectively ensuring electricity safety and compliance with energy metering regulations.

[0008] In one optional embodiment, the wide-voltage power supply module includes: an input unit, a voltage conversion unit, and an energy storage output unit. The input unit's input terminal acquires external voltage, and its output terminal is connected to the input terminal of the voltage conversion unit. The input unit is used for filtering. The output terminal of the voltage conversion unit is connected to the input terminal of the energy storage output unit, and the voltage conversion unit is used to convert the external voltage into a first supply voltage. The first output terminal of the energy storage output unit is connected to the first power supply terminal of the metering main control module and the first power supply terminal of the circuit breaker control module. The second terminal of the energy storage output unit is connected to the second power supply terminal of the metering main control module and the second power supply terminal of the circuit breaker control module. The energy storage output unit is used to directly output the first supply voltage and store the first supply voltage before converting it into a second supply voltage for output.

[0009] In one optional embodiment, the energy storage output unit includes an energy storage unit and a voltage regulator unit, wherein the input terminal of the energy storage unit is connected to the output terminal of the voltage conversion unit, the first output terminal of the energy storage unit outputs a first supply voltage, the second output terminal of the energy storage unit is connected to the input terminal of the voltage regulator unit, the energy storage unit is used to store the first supply voltage, and the voltage regulator unit is used to regulate the voltage and convert the first supply voltage into a second supply voltage before outputting it.

[0010] In one optional embodiment, the circuit breaker control module includes a drive unit and a relay unit. The input terminal of the drive unit is connected to the output terminal of the metering main control module, and the output terminal of the drive unit is connected to the control terminal of the relay unit. The first power supply terminal of the drive unit collects a first power supply voltage, and the second power supply terminal of the drive unit collects a second power supply voltage. The drive unit is used to control the relay unit to operate based on the control signal of the metering main control module using the first power supply voltage or the second power supply voltage. The relay unit is connected in series in the external power supply line, and the detection terminal of the relay unit is connected to the first input terminal of the metering main control module. The relay unit is used to control the on / off state of the external power supply line.

[0011] In one optional embodiment, the relay unit includes a magnetic latching relay and a manganese-copper shunt, wherein the first terminal of the magnetic latching relay is connected to the output terminal of the drive unit, the second terminal of the magnetic latching relay is connected to the power supply terminal of the external power supply line, the third terminal of the magnetic latching relay is connected to the first terminal of the manganese-copper shunt, the second terminal of the manganese-copper shunt is connected to the negative terminal of the external power supply line, and the detection terminal of the manganese-copper shunt is connected to the first input terminal of the metering main control module.

[0012] In one alternative implementation, the electricity meter further includes a display module connected to a first end of the metering control module.

[0013] In one alternative implementation, the electricity meter further includes a communication module connected to a second end of the metering control module.

[0014] In one alternative implementation, the electricity meter further includes a touch button module connected to a third terminal of the metering control module.

[0015] In one optional implementation, the electricity meter further includes a storage module connected to the fourth terminal of the metering control module; the storage module is a dual-verification, dual-backup memory.

[0016] In one alternative implementation, the electricity meter further includes an energy pulse output module connected to the fifth terminal of the metering control module. Attached Figure Description

[0017] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a first composition diagram of an electricity meter according to an embodiment of the present utility model; Figure 2 This is a second composition diagram of an electricity meter according to an embodiment of the present utility model; Figure 3 This is a detailed circuit diagram of a wide-voltage power supply module according to an embodiment of the present invention; Figure 4 This is a detailed circuit diagram of the opening and closing control module according to an embodiment of the present utility model; Figure 5 This is a detailed circuit diagram of the metering main control module according to an embodiment of the present utility model; Figure 6 This is a third component diagram of an electricity meter according to an embodiment of the present utility model; Figure 7 This is a detailed circuit diagram of the display module according to an embodiment of the present utility model; Figure 8 This is a detailed circuit diagram of the communication module according to an embodiment of the present utility model; Figure 9 This is a detailed circuit diagram of the power pulse output module according to an embodiment of the present utility model; Figure 10 This is a detailed circuit diagram of the touch button module according to an embodiment of the present utility model; Figure 11 This is a detailed circuit diagram of the storage module according to an embodiment of the present utility model. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] It is understood that before using the technical solutions disclosed in the various embodiments of this utility model, users should be informed of the types, scope of use, and usage scenarios of the personal information involved in this utility model in an appropriate manner in accordance with relevant laws and regulations, and user authorization should be obtained.

[0021] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0022] This embodiment provides an electricity meter, such as Figure 1 As shown, it includes: a wide voltage power supply module 1, a metering main control module 2, and a circuit breaker control module 3.

[0023] Specifically, Figure 1 In this circuit, the input terminal of the wide voltage power supply module 1 collects the external voltage. The first output terminal of the wide voltage power supply module 1 is connected to the power supply terminal of the metering main control module 2 and the first power supply terminal of the circuit breaker control module 3. The second output terminal of the wide voltage power supply module 1 is connected to the second power supply terminal of the metering main control module 2 and the second power supply terminal of the circuit breaker control module 3. The wide voltage power supply module 1 is used to convert the level of the external voltage and output the first power supply voltage, and after storing the first power supply voltage, it converts it into the second power supply voltage for output.

[0024] Optionally, the wide voltage range can be 85VAC~265VAC, covering typical operating conditions such as normal grid fluctuations, low voltage at the end of long-distance power transmission, and sag during the start-up of large equipment. The wide voltage power module 1 can convert external voltage into multi-level supply voltage and store it.

[0025] For example, the wide-voltage power supply module 1 converts the external voltage into a first supply voltage to ensure the normal operation of the core metering algorithm unit and data storage unit of the metering main control module 2, and to meet the power requirements for daily metering and data interaction. The first supply voltage also supplies power to the relay drive circuit and magnetic latching relay coil in the first power supply terminal of the circuit breaker control module 3, providing the basis for the instantaneous peak current for the circuit breaker control module 3 to perform circuit breaker opening and closing actions.

[0026] For example, while outputting the first supply voltage, the wide-voltage power supply module 1 stores the electrical energy of the first supply voltage through its built-in energy storage module, and then converts the stored electrical energy into a second supply voltage through an internal secondary voltage regulation circuit to power the low-power units such as the serial communication and clock circuit of the metering main control module 2. The second supply voltage also powers the medium current sampling circuit and logic control circuit of the opening and closing control module 3.

[0027] Specifically, the wide-voltage power supply module 1 can ensure that the metering main control module 2 always has a stable power supply when the grid voltage fluctuates, and also provide dual energy support for the opening and closing control module 3, namely real-time power supply and backup energy storage power supply.

[0028] Figure 1 In this process, the first input terminal of the metering main control module 2 collects the operating current signal of the opening and closing control module 3, the second input terminal of the metering main control module 2 collects the grid voltage signal, and the output terminal of the metering main control module 2 is connected to the control terminal of the opening and closing control module 3. The metering main control module 2 is used to control the closing control module 3 to operate based on the first supply voltage or the second supply voltage according to the magnitude of the grid voltage signal.

[0029] Specifically, when the metering main control module 2 detects that the grid voltage signal is within the normal range, it determines that the first power supply voltage output by the wide voltage power supply module 1 is sufficient. At this time, it controls the first power supply terminal of the tripping and closing control module 3 to connect to the first power supply voltage and the second power supply terminal to disconnect the input, so that the tripping and closing control module 3 operates directly based on the first power supply voltage. When the grid voltage signal is detected to be in the low voltage range, it determines that the real-time output power of the wide voltage power supply module 1 is attenuated. It immediately controls the second power supply terminal of the tripping and closing control module 3 to connect to the second power supply voltage and the first power supply terminal to disconnect the input, so that the tripping and closing control module 3 switches to operate based on the second power supply voltage, ensuring that even under low grid voltage, the tripping and closing control module 3 can still obtain sufficient driving energy to avoid relay failure.

[0030] It should be noted that the step of the metering main control module comparing the grid voltage signal with the preset range and controlling the switching state of the power supply terminal of the circuit breaker control module based on the comparison result is a mature technical means in the prior art. For example, the prior art "real-time monitoring of the grid voltage signal and comparison with the preset range through the broadband carrier module, and automatic control of the power supply terminal when an abnormal voltage is detected", and "the main control module of the circuit breaker obtains the current grid voltage through the acquisition module to control the power supply link of the gate position operation module to be connected or disconnected, and executes the opening or closing operation", etc. That is, this utility model only protects the structure of the energy meter and does not protect the specific internal control method.

[0031] The electricity meter provided in this embodiment has two main advantages. First, the wide-voltage power supply module can collect external voltage fluctuations, converting them into a first supply voltage to directly power the metering control module and the circuit breaker control module. It can also store the first supply voltage and convert it into a second supply voltage for backup, effectively overcoming the limitation of the narrow power supply range of traditional electricity meters and preventing system power failure and shutdown under extreme conditions such as sudden drops in grid voltage and low voltage. Second, the metering control module can control the circuit breaker control module to switch to the first or second supply voltage based on the magnitude of the grid voltage signal by collecting the operating current signal and grid voltage signal of the circuit breaker control module. This completely solves the problem of circuit breaker failure caused by insufficient instantaneous power supply under low voltage in traditional solutions. At the same time, the stable power supply provided by the wide-voltage power supply module to the metering control module, combined with its accurate electrical parameter acquisition and calculation capabilities, can ensure continuous and accurate metering data without loss or confusion. The overall solution simplifies the circuit architecture and adapts to miniaturized designs while significantly improving the operational reliability, control effectiveness, and metering accuracy of the electricity meter under complex grid conditions, effectively ensuring electricity safety and compliance of electricity metering.

[0032] In some alternative implementations, such as Figure 2 As shown, the wide voltage power supply module 1 includes an input unit 11, a voltage conversion unit 12, and an energy storage output unit 13. The input terminal of the input unit 11 collects external voltage, and the output terminal of the input unit 11 is connected to the input terminal of the voltage conversion unit 12. The input unit 11 is used for filtering.

[0033] Specifically, Figure 2In this module, the input unit 11 directly connects to a wide voltage input, covering typical operating conditions such as normal grid operation, low voltage at the end of long-distance power transmission, and voltage dips during the startup of large equipment. Its core function is to preprocess and safely connect external voltages. A dedicated filtering structure filters out high-frequency noise and transient surges from the external power grid, preventing unstable factors from affecting subsequent voltage conversion stages and ensuring the voltage signal input to the voltage conversion unit 12 is undisturbed. The input unit 11 also integrates a safety protection mechanism, which can cut off the external voltage input in case of overcurrent, short circuit, or other abnormalities, preventing the fault from spreading to the module and related modules. Simultaneously, it suppresses surge current at power-on, ensuring the startup safety of the entire wide-voltage power supply module.

[0034] Figure 2 In this circuit, the output terminal of the voltage conversion unit 12 is connected to the input terminal of the energy storage output unit 13, and the voltage conversion unit 12 is used to convert the external voltage into the first supply voltage.

[0035] Optionally, the voltage conversion unit can simultaneously output multiple supply voltages with the same or different voltage levels.

[0036] The first output terminal of the energy storage output unit 13 is connected to the first power supply terminal of the metering main control module 2 and the first power supply terminal of the circuit breaker control module 3. The second terminal of the energy storage output unit 13 is connected to the second power supply terminal of the metering main control module 1 and the second power supply terminal of the circuit breaker control module 3. The energy storage output unit 13 is used to directly output the first power supply voltage and store the first power supply voltage and then convert it into the second power supply voltage for output.

[0037] Specifically, Figure 2 In the real-time power supply path, the energy storage output unit 13 directly transmits the first power supply voltage to the first power supply terminal of the metering main control module 2 and the first power supply terminal of the circuit breaker control module 3 through the first output terminal, which is suitable for normal working conditions when the grid voltage is normal; in the energy storage and secondary conversion path, the first power supply voltage is stored through a dedicated energy storage structure, and the first power supply voltage is converted into a second power supply voltage that meets the low power consumption requirements by means of a voltage conversion mechanism.

[0038] Specifically, Figure 2 Subsequently, the energy storage output unit 13 transmits the second power supply voltage to the second power supply terminal of the metering main control module 2 and the second power supply terminal of the circuit breaker control module 3 through the second output terminal, ensuring the low-power key functions of the metering main control module 2 such as core metering calculation, data storage, and clock synchronization, and ensuring the low-power auxiliary functions of the circuit breaker control module 3 such as current sampling and fault detection.

[0039] In some alternative implementations, such as Figure 3As shown, the energy storage output unit 13 includes an energy storage unit 131 and a voltage regulator unit 132. The input terminal of the energy storage unit 131 is connected to the output terminal of the voltage conversion unit 12. The first output terminal of the energy storage unit 131 outputs a first supply voltage VCC. The second output terminal of the energy storage unit 131 is connected to the input terminal of the voltage regulator unit 132. The energy storage unit 131 is used to store the first supply voltage VCC. The voltage regulator unit 132 is used to regulate the voltage and convert the first supply voltage VCC into a second supply voltage of 3.3V for output.

[0040] Specifically, Figure 3 In this circuit, when the grid voltage is within the normal range and the voltage conversion unit 12 has sufficient output power, the energy storage unit 131 stores the electrical energy of the first supply voltage VCC. This serves as a backup power source in case the grid voltage drops to the low-voltage threshold and the real-time output power of the voltage conversion unit 12 is insufficient. The stored first supply voltage VCC acts as a backup energy source to prevent related modules from malfunctioning due to power outages or insufficient power. While outputting the first supply voltage VCC in real time, the energy storage unit 131 also transmits some electrical energy to the voltage stabilizing unit 132, forming an energy distribution mode that prioritizes real-time power supply and converts surplus energy for backup. This not only does not affect the stability of the power supply under current high power demand but also provides an energy foundation for the voltage conversion of the low-power core circuit.

[0041] In some alternative implementations, such as Figure 4 As shown, the circuit breaker control module includes a drive unit 31 and a relay unit 32. The input terminals (IN1 and IN2) of the drive unit 31 are connected to the output terminals of the metering main control module, and the output terminals (OJ1 and OJ2) of the drive unit 31 are connected to the control terminals of the relay unit 32. The first power supply terminal of the drive unit 31 acquires the first power supply voltage VCC, and the second power supply terminal of the drive unit 31 acquires the second power supply voltage 3.3V. The drive unit 31 is used to control the relay unit 32 to operate based on the control signal of the metering main control module 2 using the first power supply voltage VCC or the second power supply voltage 3.3V. The relay unit 32 is connected in series in the external power supply line, and the detection terminals (I+ and I-) of the relay unit 32 are connected to the first input terminal of the metering main control module. The relay unit 32 is used to control the on / off state of the external power supply line.

[0042] Specifically, Figure 4In the relay unit 32, there are: a magnetic latching relay and a manganese copper shunt. The first end of the magnetic latching relay is connected to the output end of the drive unit (i.e., OJ1 and OJ2 ends). The magnetic latching relay is connected to the power supply end of the external power supply line through its second end (i.e., H7 end). The third end of the magnetic latching relay is connected to the first end of the manganese copper shunt. The second end of the manganese copper shunt is connected to the negative end of the external power supply line (i.e., H8 end). The detection end (i.e., I+ and I- ends) of the manganese copper shunt is connected to the first input end of the metering main control module.

[0043] For example, Figure 5 For the detailed circuit diagram of the metering main control module, please refer to... Figure 4 Under normal circumstances (e.g., when the grid voltage is greater than 100VAC), external systems (such as power monitoring platforms) send remote opening / closing commands to the metering master control module via serial ports RXD / TXD. After parsing the commands, the metering master control module generates corresponding high / low level control signals for opening / closing on pins P1.0 and P1.1. The metering master control module outputs control signals to the drive unit 31, which converts the first supply voltage VCC provided by the switching power supply into the peak drive current pulse required by the relay, directly driving the magnetic latching relay to complete the opening / closing action.

[0044] For example, refer to Figure 4 and Figure 5 When the metering control module detects overcurrent, overload or other faults through the current sampling signal of the manganese copper shunt, or detects low grid voltage (e.g., less than or equal to 100VAC) through the VDCIN channel and needs to be tripped urgently, the metering control module outputs a control signal to the IJ1 and IJ2 terminals of the drive unit 31, connects the second supply voltage 3.3V to the power supply terminal of the drive unit 31, and disconnects the direct power supply link between the first power supply and the drive unit 31 through hardware isolation design.

[0045] In some alternative implementations, such as Figure 6 As shown, the electricity meter also includes a display module 4 connected to the first end of the metering control module 2.

[0046] Specifically, such as Figure 7 As shown, display module 4 is used to display electrical energy parameters. Display module 4 can be a liquid crystal display (LCD) or an LED digital tube, and the driving circuit can control the display screen to display the electrical energy parameters stored in the metering main control module.

[0047] In some alternative implementations, such as Figure 6 As shown, the electricity meter also includes: a communication module 5 connected to the second end of the metering control module 2 and an electricity pulse output module 6 connected to the fifth end of the metering control module 2.

[0048] For example, such as Figure 8 As shown, the communication module 5 adopts the MODBUS communication protocol and is powered by the 485_VCC voltage output from the wide voltage power supply module 1.

[0049] For example, such as Figure 9 As shown, the power pulse output module 7 includes an optocoupler U16, which can isolate input and output signals and prevent electrical interference.

[0050] In some alternative implementations, such as Figure 6 As shown, the electricity meter also includes a touch button module 7 connected to the third end of the metering control module 2.

[0051] For example, such as Figure 10 As shown, users can perform operations such as returning, adding, and setting data from the electricity meter through the touch button module.

[0052] In some alternative implementations, such as Figure 6 As shown, the electricity meter also includes a storage module 8 connected to the fourth terminal of the metering control module 2; the storage module 8 is a dual-verification dual-backup memory.

[0053] Optionally, Figure 11 The circuit diagram for the storage module is shown below. The storage module uses electrically erasable programmable read-only memory (EEPROM) to store data. The data is double-verified and double-backed up. The stored data has a built-in backup address. When the main data verification fails, the data at the backup address is read, making the data storage safer and more reliable.

[0054] Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and such modifications and variations all fall within the scope defined by the appended claims.

Claims

1. An electricity meter, characterized in that, include: The system includes a wide-voltage power supply module, a metering main control module, and a circuit breaker control module. The input terminal of the wide voltage power supply module collects external voltage. The first output terminal of the wide voltage power supply module is connected to the first power supply terminal of the metering main control module and the first power supply terminal of the circuit breaker control module. The second output terminal of the wide voltage power supply module is connected to the second power supply terminal of the metering main control module and the second power supply terminal of the circuit breaker control module. The wide voltage power supply module is used to convert the level of the external voltage and output a first power supply voltage, and store the first power supply voltage and then convert it into a second power supply voltage for output. The first input terminal of the metering main control module collects the operating current signal of the circuit breaker control module, the second input terminal of the metering main control module collects the grid voltage signal, and the output terminal of the metering main control module is connected to the control terminal of the circuit breaker control module. The metering main control module is used to control the closing control module to operate based on the magnitude of the grid voltage signal, either a first supply voltage or a second supply voltage.

2. The electricity meter according to claim 1, characterized in that, The wide-voltage power supply module includes: an input unit, a voltage conversion unit, and an energy storage output unit, wherein... The input terminal of the input unit acquires external voltage, and the output terminal of the input unit is connected to the input terminal of the voltage conversion unit. The input unit is used for filtering. The output terminal of the voltage conversion unit is connected to the input terminal of the energy storage output unit, and the voltage conversion unit is used to convert the external voltage into a first supply voltage; The first output terminal of the energy storage output unit is connected to the first power supply terminal of the metering main control module and the first power supply terminal of the circuit breaker control module. The second terminal of the energy storage output unit is connected to the second power supply terminal of the metering main control module and the second power supply terminal of the circuit breaker control module. The energy storage output unit is used to directly output the first power supply voltage and store the first power supply voltage and then convert it into the second power supply voltage for output.

3. The electricity meter according to claim 2, characterized in that, The energy storage output unit includes: an energy storage unit and a voltage regulator unit, wherein... The input terminal of the energy storage unit is connected to the output terminal of the voltage conversion unit, the first output terminal of the energy storage unit outputs a first supply voltage, the second output terminal of the energy storage unit is connected to the input terminal of the voltage regulator unit, and the energy storage unit is used to store the first supply voltage. The voltage regulator unit is used to regulate the voltage and convert the first supply voltage into a second supply voltage before outputting it.

4. The electricity meter according to claim 1, characterized in that, The circuit breaker control module includes: a drive unit and a relay unit, wherein... The input terminal of the drive unit is connected to the output terminal of the metering main control module, and the output terminal of the drive unit is connected to the control terminal of the relay unit. The first power supply terminal of the drive unit collects a first power supply voltage, and the second power supply terminal of the drive unit collects a second power supply voltage. The drive unit is used to control the relay unit to operate based on the control signal of the metering main control module using the first power supply voltage or the second power supply voltage. The relay unit is connected in series in the external power supply line. The detection terminal of the relay unit is connected to the first input terminal of the metering main control module. The relay unit is used to control the on / off state of the external power supply line.

5. The electricity meter according to claim 4, characterized in that, The relay unit includes: a magnetic latching relay and a manganin shunt, wherein... The first terminal of the magnetic latching relay is connected to the output terminal of the drive unit, the second terminal of the magnetic latching relay is connected to the power supply terminal of the external power supply line, and the third terminal of the magnetic latching relay is connected to the first terminal of the manganese-copper shunt. The second end of the manganese-copper shunt is connected to the negative end of the external power supply line, and the detection end of the manganese-copper shunt is connected to the first input end of the metering main control module.

6. The electricity meter according to claim 1, characterized in that, Also includes: A display module connected to the first end of the metering main control module.

7. The electricity meter according to claim 1, characterized in that, Also includes: A communication module connected to the second end of the metering main control module.

8. The electricity meter according to claim 1, characterized in that, Also includes: A touch button module connected to the third end of the metering main control module.

9. The electricity meter according to claim 1, characterized in that, Also includes: A storage module connected to the fourth terminal of the metering main control module; The storage module is a dual-verification, dual-backup storage device.

10. The electricity meter according to claim 1, characterized in that, Also includes: An energy pulse output module connected to the fifth terminal of the metering main control module.

Images