CN209730449U - Self-resetting type collection control electricity box circuit and collection control electricity box - Google Patents

Self-resetting type collection control electricity box circuit and collection control electricity box Download PDF

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Publication number
CN209730449U
CN209730449U CN201920653844.4U CN201920653844U CN209730449U CN 209730449 U CN209730449 U CN 209730449U CN 201920653844 U CN201920653844 U CN 201920653844U CN 209730449 U CN209730449 U CN 209730449U
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CN
China
Prior art keywords
self
electricity box
collection control
control electricity
breaker
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Fee Related
Application number
CN201920653844.4U
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Chinese (zh)
Inventor
袁满
袁波
袁涛
姚巍刚
李传华
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xi'an Super Peng Intelligent Technology Co Ltd
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Xi'an Super Peng Intelligent Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xi'an Super Peng Intelligent Technology Co Ltd filed Critical Xi'an Super Peng Intelligent Technology Co Ltd
Priority to CN201920653844.4U priority Critical patent/CN209730449U/en
Application granted granted Critical
Publication of CN209730449U publication Critical patent/CN209730449U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B70/00Technologies for an efficient end-user side electric power management and consumption
    • Y02B70/30Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y04INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04SSYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S20/00Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
    • Y04S20/20End-user application control systems
    • Y04S20/242Home appliances

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  • Remote Monitoring And Control Of Power-Distribution Networks (AREA)

Abstract

This application involves a kind of self-resetting type collection control electricity box circuit and collection control electricity box, comprising: breaker;With at least one electric energy meter of breaker electrical connection;Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector;Each Self-recover overvoltage-undervoltage protector is by dividing family breaker accessing user;Self-recover overvoltage-undervoltage protector be used for when in self-resetting type collection control electricity box circuit electric voltage over press or it is under-voltage when, cutting divides the electrical connection of family breaker and Self-recover overvoltage-undervoltage protector.When there is under-voltage or over-voltage in the application self-resetting type collection control electricity box circuit; Self-recover overvoltage-undervoltage protector shuts off the connection between electric energy meter and point family breaker; to make the electrical equipment of user terminal separate with breaker, the electric energy meter in self-resetting type collection control electricity box circuit; protect the electrical equipment of user terminal; avoid its because over-voltage or it is under-voltage be damaged, while also protecting the electrical equipment in self-resetting type collection control electricity box circuit.

Description

Self-resetting type collection control electricity box circuit and collection control electricity box
Technical field
This application involves ammeter prison installing area more particularly to a kind of self-resetting type collection control electricity box circuit and collection control electricity box.
Background technique
It is installed to ammeter, it is general to realize the unified installation settings to ammeter using collection control electricity box.Currently, electricity is connect After entering collection control electricity box, the electric energy meter of each user is connected by breaker, then passes through miniature circuit breaker after each user's electric energy meter It registers one's residence.
Since miniature circuit breaker only has overload temperature-sensitive trip avoidance function, when voltage occurs abnormal, it is likely to result in collection Control the equipment damage in electricity box, in some instances it may even be possible to will lead to burning for household electrical appliance.
Utility model content
To be overcome the problems, such as present in the relevant technologies at least to a certain extent, the application provides a kind of self-resetting type collection control table Case circuit and collection control electricity box.
According to a first aspect of the present application, a kind of self-resetting type collection control electricity box circuit is provided, comprising:
Breaker;
With at least one electric energy meter of breaker electrical connection;
Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector;
Each Self-recover overvoltage-undervoltage protector is by dividing family breaker accessing user;
The Self-recover overvoltage-undervoltage protector is used for when the electric voltage over press in the self-resetting type collection control electricity box circuit or owes Divide the electrical connection of family breaker Yu the Self-recover overvoltage-undervoltage protector when pressure, described in cutting.
It optionally, further include section breaker, key intelligent apparatus before table;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus respectively with section breaker communication link before the Self-recover overvoltage-undervoltage protector and the table It connects;So that disjunction is opened before the signal that the key intelligent apparatus is issued according to the Self-recover overvoltage-undervoltage protector controls the table The on-off of pass.
Optionally, further includes: high speed carrier communication module;
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that described The electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to clothes by high speed carrier communication module Business backstage.
According to a second aspect of the present application, a kind of collection control electricity box are provided, comprising:
Cabinet;
It is arranged in the intracorporal self-resetting type collection control electricity box circuit of the case;
The self-resetting type collection control electricity box circuit includes:
According to a first aspect of the present application, a kind of self-resetting type collection control electricity box circuit is provided, comprising:
Breaker;
With at least one electric energy meter of breaker electrical connection;
Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector;
Each Self-recover overvoltage-undervoltage protector is by dividing family breaker accessing user;
The Self-recover overvoltage-undervoltage protector is used for when the electric voltage over press in the self-resetting type collection control electricity box circuit or owes Divide the electrical connection of family breaker Yu the Self-recover overvoltage-undervoltage protector when pressure, described in cutting.
Optionally, the cabinet includes the first cabinet and the second cabinet;
Family breaker is divided to be arranged in second cabinet in the self-resetting type collection control electricity box circuit;
Equipment in the self-resetting type collection control electricity box circuit in addition to dividing family breaker is arranged in first cabinet.
Optionally, the self-resetting type collection control electricity box circuit further include:
Section breaker, key intelligent apparatus before table;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus respectively with section breaker communication link before the Self-recover overvoltage-undervoltage protector and the table It connects;So that disjunction is opened before the signal that the key intelligent apparatus is issued according to the Self-recover overvoltage-undervoltage protector controls the table The on-off of pass;
First cabinet is provided with the first chamber door;Second cabinet is provided with the second chamber door;
First chamber door and second chamber door are respectively arranged with biometric lock;
The biometric lock is connected with the key intelligent apparatus;For storing the biological characteristic of preparatory typing.
Optionally, the biometric lock is face recognition lock, iris recognition lock or fingerprint identification lock.
Optionally, the self-resetting type collection control electricity box circuit further include:
High speed carrier communication module;
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that described The electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to clothes by high speed carrier communication module Business backstage;
Alarm is provided in the collection control electricity box;The alarm and the key intelligent apparatus communicate to connect;For It is alarmed according to the signal that key intelligent apparatus issues.
Optionally, the model TXCP01-CPDD16 of the high speed carrier communication module.
Optionally, the song equipment in the self-resetting type collection control electricity box circuit is carried out electrically by general flame retardant type enclosed busbar Connection or communication connection.
Technical solution provided by the present application can include the following benefits: due between electric energy meter and point family breaker Provided with Self-recover overvoltage-undervoltage protector, when there is under-voltage or over-voltage in the application self-resetting type collection control electricity box circuit, runback Formula overvoltage-undervoltage protector shuts off the connection between electric energy meter and point family breaker, to make the electrical equipment of user terminal and oneself Breaker, electric energy meter separation in compound collection control electricity box circuit, protect the electrical equipment of user terminal, avoid it because of over-voltage or owe Pressure is damaged, while also protecting the electrical equipment in self-resetting type collection control electricity box circuit.
It should be understood that above general description and following detailed description be only it is exemplary and explanatory, not The application can be limited.
Detailed description of the invention
The drawings herein are incorporated into the specification and forms part of this specification, and shows the implementation for meeting the application Example, and together with specification it is used to explain the principle of the application.
Fig. 1 is a kind of circuit diagram for self-resetting type collection control electricity box circuit that embodiments herein one provides.
Fig. 2 is a kind of structural schematic diagram for collection control electricity box that embodiments herein two provides.
Fig. 3 is the structural schematic diagram of the first chamber door and the second chamber door.
Appended drawing reference: 1, electric energy meter;2, Self-recover overvoltage-undervoltage protector;3, divide family breaker;4, section breaker before table;5, Breaker;6, key intelligent apparatus.
Specific embodiment
Example embodiments are described in detail here, and the example is illustrated in the accompanying drawings.Following description is related to When attached drawing, unless otherwise indicated, the same numbers in different drawings indicate the same or similar elements.Following exemplary embodiment Described in embodiment do not represent all embodiments consistent with the application.On the contrary, they be only with it is such as appended The example of the consistent device of some aspects be described in detail in claims, the application.
The technical standard that existing collection control electricity box use is usually " technical standard of enterprise of Q/GDW-HN-4-5-2009 ", " JGJ16-2008 design of civil buildings specification " and " JGJ242-2011 residential housing electrical design are not included in the standard Specification " the two standards, that is to say, that the circuit in existing collection control electricity box only relies on the miniature circuit breaker after electric energy meter, i.e., Divide family breaker accessing user, only has overload temperature-sensitive trip avoidance function.
When electric voltage exception occurs in entire power supply system, such as when overvoltage or under-voltage, either for the use of user terminal Electric equipment still collects for the electrical equipment in control electricity box, and all without any protection, such as when the system is overloaded, system will appear Under-voltage, when brownout, household electrical appliance cisco unity malfunction, and electric energy loss can also increase, especially rotation electric appliance exists Electric energy loss is easily burnt in the case where increasing, or even causes fire;For another example, when three-phase electricity imbalance, if system is neutral Line broken string, phase voltage will appear overvoltage, the electric appliance after electricity box can be caused to burn at this time.
In order to solve the above-mentioned technical problem, present applicant proposes a kind of self-resetting type collection control electricity box circuit and be provided with this from The collection control electricity box of compound collection control electricity box circuit, are illustrated in the form of embodiment below.
Embodiment one
Referring to Fig. 1, Fig. 1 is a kind of circuit signal for self-resetting type collection control electricity box circuit that embodiments herein one provides Figure.
As shown in Figure 1, self-resetting type collection control electricity box circuit provided in this embodiment includes:
Breaker;
With at least one electric energy meter 1 of breaker electrical connection;
Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector 2;
Each Self-recover overvoltage-undervoltage protector is by dividing family breaker 3 accessing user;
The Self-recover overvoltage-undervoltage protector is used for when the electric voltage over press in the self-resetting type collection control electricity box circuit or owes Divide the electrical connection of family breaker Yu the Self-recover overvoltage-undervoltage protector when pressure, described in cutting.
Due to electric energy meter and divide between the breaker of family be provided with Self-recover overvoltage-undervoltage protector, when the application self-resetting type collection In control electricity box circuit when there is under-voltage or over-voltage, Self-recover overvoltage-undervoltage protector shut off electric energy meter and point family breaker it Between connection protect so that the electrical equipment of user terminal be made to separate with breaker, the electric energy meter in self-resetting type collection control electricity box circuit The electrical equipment of user terminal, avoid its because over-voltage or it is under-voltage be damaged, while also protecting self-resetting type collection control electricity box circuit In electrical equipment.
It should be noted that Self-recover overvoltage-undervoltage protector can re-close when the voltage in system restores normal, to User terminal power supply.
Wherein, the model of Self-recover overvoltage-undervoltage protector can be TLGQ-63, be also possible to may be implemented for disposable type The Self-recover overvoltage-undervoltage protector of function in the present embodiment.
In addition, the self-resetting type collection control electricity box circuit of the application can also include:
Section breaker 4, key intelligent apparatus, high speed carrier communication module before table;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus respectively with section breaker communication link before the Self-recover overvoltage-undervoltage protector and the table It connects;So that disjunction is opened before the signal that the key intelligent apparatus is issued according to the Self-recover overvoltage-undervoltage protector controls the table The on-off of pass.
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that described The electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to clothes by high speed carrier communication module Business backstage.
Wherein, key intelligent apparatus can with but be not limited only to be existing model XCP_I equipment, section breaker before table Model can with but be not limited only to be XCP_I, it is TXCP01- that the model of high speed carrier communication module, which can be but be not limited only to, CPDD16。
In addition, the self-resetting type collection control electricity box circuit of the present embodiment can also include:
Wireless transport module;The wireless transport module is connected with the key intelligent apparatus, is used for and mobile device Wireless communication transmissions data.
Embodiment two
Referring to Fig. 2, Fig. 2 is a kind of structural schematic diagram for collection control electricity box that embodiments herein two provides.
As shown in Fig. 2, collection control electricity box provided in this embodiment include:
Cabinet;
It is arranged in the intracorporal self-resetting type collection control electricity box circuit of the case;
The self-resetting type collection control electricity box circuit includes:
According to a first aspect of the present application, a kind of self-resetting type collection control electricity box circuit is provided, comprising:
Breaker 5;
With at least one electric energy meter 1 of breaker electrical connection;
Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector 2;
Each Self-recover overvoltage-undervoltage protector is by dividing family breaker 3 accessing user;
The Self-recover overvoltage-undervoltage protector is used for when the electric voltage over press in the self-resetting type collection control electricity box circuit or owes Divide the electrical connection of family breaker Yu the Self-recover overvoltage-undervoltage protector when pressure, described in cutting.
Further, the cabinet includes the first cabinet and the second cabinet;
Family breaker is divided to be arranged in second cabinet in the self-resetting type collection control electricity box circuit;
Equipment in the self-resetting type collection control electricity box circuit in addition to dividing family breaker is arranged in first cabinet.
Further, the self-resetting type collection control electricity box circuit further include:
Section breaker 4, key intelligent apparatus 6 before table;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus respectively with section breaker communication link before the Self-recover overvoltage-undervoltage protector and the table It connects;So that disjunction is opened before the signal that the key intelligent apparatus is issued according to the Self-recover overvoltage-undervoltage protector controls the table The on-off of pass;
First cabinet is provided with the first chamber door;Second cabinet is provided with the second chamber door;
First chamber door and second chamber door are respectively arranged with biometric lock;
The biometric lock is connected with the key intelligent apparatus;For storing the biological characteristic of preparatory typing.
In addition, the biometric lock is face recognition lock, iris recognition lock or fingerprint identification lock.
Self-resetting type collection control electricity box road can also include:
High speed carrier communication module;
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that described The electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to clothes by high speed carrier communication module Business backstage;
Alarm is provided in the collection control electricity box;The alarm and the key intelligent apparatus communicate to connect;For It is alarmed according to the signal that key intelligent apparatus issues.
The self-resetting type collection control electricity box circuit can also include:
Wireless transport module;
The wireless transport module is connected with the key intelligent apparatus, is used for and mobile device wireless communication transmissions number According to.
It should be noted that wireless transport module can be bluetooth module, wireless transport module can also be radio-frequency module.
In addition, the song equipment in the self-resetting type collection control electricity box circuit electrically connect by general flame retardant type enclosed busbar It connects or communicates to connect.
Above equipment uses conventional instrument installation method in collection control electricity box in the dark.
Fig. 3 is the structural schematic diagram of the first chamber door and the second chamber door, wherein electric energy meter observation is provided on the first chamber door Window is additionally provided with protector observation window for observing the reading of electric energy meter, for observing the working condition of protector, in addition, the The USB interface being connected with key intelligent apparatus is additionally provided on one table door, for key intelligent apparatus programming program, lead General electricity charging interface can also be arranged in data etc. out, can in case of emergency be used to equipment charge, such as electricity when maintenance Power tool equipment.
It is understood that same or similar part can mutually refer in the various embodiments described above, in some embodiments Unspecified content may refer to the same or similar content in other embodiments.
It should be noted that term " first ", " second " etc. are used for description purposes only in the description of the present application, without It can be interpreted as indication or suggestion relative importance.In addition, in the description of the present application, unless otherwise indicated, the meaning of " multiple " Refer at least two.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example Point is contained at least one embodiment or example of the application.In the present specification, schematic expression of the above terms are not Centainly refer to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be any One or more embodiment or examples in can be combined in any suitable manner.
Although embodiments herein has been shown and described above, it is to be understood that above-described embodiment is example Property, it should not be understood as the limitation to the application, those skilled in the art within the scope of application can be to above-mentioned Embodiment is changed, modifies, replacement and variant.

Claims (10)

1. a kind of self-resetting type collection control electricity box circuit characterized by comprising
Breaker;
With at least one electric energy meter of breaker electrical connection;
Each electric energy meter is connected separately with Self-recover overvoltage-undervoltage protector;
Each Self-recover overvoltage-undervoltage protector is by dividing family breaker accessing user;
The Self-recover overvoltage-undervoltage protector be used for when in the self-resetting type collection control electricity box circuit electric voltage over press or it is under-voltage when, Divide the electrical connection of family breaker Yu the Self-recover overvoltage-undervoltage protector described in cutting.
2. self-resetting type collection control electricity box circuit according to claim 1, which is characterized in that further include section breaker before table, close Key intelligent apparatus;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus is communicated to connect with section breaker before the Self-recover overvoltage-undervoltage protector and the table respectively;With The key intelligent apparatus is set to control section breaker before the table according to the signal that the Self-recover overvoltage-undervoltage protector issues On-off.
3. self-resetting type collection control electricity box circuit according to claim 2, which is characterized in that further include: high speed carrier communicates mould Block;
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that the high speed After the electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to service by carrier communication module Platform.
4. a kind of collection controls electricity box characterized by comprising
Cabinet;
It is arranged in the intracorporal self-resetting type collection control electricity box circuit as described in claim 1 of the case.
5. collection according to claim 4 controls electricity box, which is characterized in that the cabinet includes the first cabinet and the second cabinet;
Family breaker is divided to be arranged in second cabinet in the self-resetting type collection control electricity box circuit;
Equipment in the self-resetting type collection control electricity box circuit in addition to dividing family breaker is arranged in first cabinet.
6. collection according to claim 5 controls electricity box, which is characterized in that the self-resetting type collection control electricity box circuit further include:
Section breaker, key intelligent apparatus before table;
Each electric energy meter is connected by section breaker before the table with the breaker;
The key intelligent apparatus is communicated to connect with section breaker before the Self-recover overvoltage-undervoltage protector and the table respectively;With The key intelligent apparatus is set to control section breaker before the table according to the signal that the Self-recover overvoltage-undervoltage protector issues On-off;
First cabinet is provided with the first chamber door;Second cabinet is provided with the second chamber door;
First chamber door and second chamber door are respectively arranged with biometric lock;
The biometric lock is connected with the key intelligent apparatus;For storing the biological characteristic of preparatory typing.
7. collection according to claim 6 controls electricity box, which is characterized in that the biometric lock is face recognition lock, iris Identification lock or fingerprint identification lock.
8. collection according to claim 6 controls electricity box, which is characterized in that the self-resetting type collection control electricity box circuit further include:
High speed carrier communication module;
The high speed carrier communication module and the key intelligent apparatus and each electric energy meter communicate to connect, so that the high speed After the electric quantity signal of the signal that the key intelligent apparatus obtains and each electric energy meter is sent to service by carrier communication module Platform;
Alarm is provided in the collection control electricity box;The alarm and the key intelligent apparatus communicate to connect;For basis The signal that key intelligent apparatus issues is alarmed.
9. collection according to claim 8 controls electricity box, which is characterized in that the self-resetting type collection control electricity box circuit further include:
Wireless transport module;
The wireless transport module is connected with the key intelligent apparatus, is used for and mobile device wireless communication transmissions data.
10. controlling electricity box according to the described in any item collection of claim 4~9, which is characterized in that the self-resetting type collection control electricity box circuit In song equipment be electrically connected or communicated to connect by general flame retardant type enclosed busbar.
CN201920653844.4U 2019-05-08 2019-05-08 Self-resetting type collection control electricity box circuit and collection control electricity box Expired - Fee Related CN209730449U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201920653844.4U CN209730449U (en) 2019-05-08 2019-05-08 Self-resetting type collection control electricity box circuit and collection control electricity box

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201920653844.4U CN209730449U (en) 2019-05-08 2019-05-08 Self-resetting type collection control electricity box circuit and collection control electricity box

Publications (1)

Publication Number Publication Date
CN209730449U true CN209730449U (en) 2019-12-03

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN201920653844.4U Expired - Fee Related CN209730449U (en) 2019-05-08 2019-05-08 Self-resetting type collection control electricity box circuit and collection control electricity box

Country Status (1)

Country Link
CN (1) CN209730449U (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362091A (en) * 2021-12-02 2022-04-15 贵州电网有限责任公司 Overvoltage-preventing meter box

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114362091A (en) * 2021-12-02 2022-04-15 贵州电网有限责任公司 Overvoltage-preventing meter box

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