Three-phase four-wire electronic watt-hour meter

Abstract

The utility model relates to the technical field of electric energy meters, in particular to a three-phase four-wire electronic type electric energy meter, which comprises an adapter and an electric energy meter, and the adapter is provided with an adapter element current input jack, an element current output jack and a null line N input jack. The electric energy meter is provided with an electric energy meter element current input pin, an element current output pin and a null line N input pin; a plug pin on the electric energy meter is plugged with a jack on the adapter, a leakage protector is arranged on the side surface of the electric energy meter, a fault indicating lamp and an alarm are arranged on the leakage protector, and the leakage display, the fault indicating lamp and the alarm are respectively connected with the electric energy meter in series. According to the utility model, the connection mode of the adapter and the electric energy meter is set to be a plug-in mode, power failure is not needed when the electric energy meter needs to be installed and replaced, and the electric leakage protector and the fault indicating lamp are arranged on the electric energy meter, so that the electric leakage condition of the electric energy meter can be found in time, and maintenance personnel can maintain the electric energy meter conveniently.

Description

Technical Field

[0001] The utility model relates to the technical field of electric energy meters, in particular to a three-phase four-wire electronic electric energy meter. Background Art

[0002] The three-phase four-wire electronic energy meter is an energy meter used to measure the electric energy consumed in a three-phase AC circuit. Compared with traditional induction energy meters, the three-phase four-wire electronic energy meter has high measurement accuracy, good stability and low power consumption.

[0003] The common three-phase four-wire electronic energy meters on the market do not have any indication when a fault occurs, making it difficult to identify the fault. In addition, when replacing the energy meter, the power needs to be turned off, affecting the use of other electrical equipment. Therefore, a three-phase four-wire electronic energy meter is proposed to address the above problems. Utility Model Content

[0004] The purpose of the present invention is to provide a three-phase four-wire electronic energy meter, which solves the problems raised in the above-mentioned background technology by providing a plug-in energy meter, a leakage protector and a fault indicator light.

[0005] To achieve the above objectives, the present invention provides the following technical solutions:

[0006] A three-phase four-wire electronic energy meter includes an adapter and an energy meter. The adapter is provided with an adapter primary current input jack, an adapter primary current output jack, and an adapter neutral line N input jack. The energy meter is provided with an energy meter primary current input pin, an energy meter primary current output pin, and an energy meter neutral line N input pin. The primary current input pin of the energy meter is plugged into the primary current input jack of the adapter, the primary current output pin of the energy meter is plugged into the primary current output jack of the adapter, and the neutral line N input jack of the energy meter is plugged into the neutral line N input jack of the adapter.

[0007] A leakage protector is provided on the side of the electric energy meter. A fault indicator light and an alarm are provided on the leakage protector. The leakage display, the fault indicator light and the alarm are respectively connected in series with the electric energy meter.

[0008] As a preferred solution, the adapter is provided with a first sealing screw, the electric energy meter is provided with a second sealing screw, and the adapter is fixed to the second sealing screw of the electric energy meter through the first sealing screw.

[0009] As a preferred solution, a nameplate is provided on the surface of the electric energy meter, and a detachable liquid crystal display window is provided on the nameplate.

[0010] As a preferred solution, the nameplate includes a nameplate body, a limiting piece and a plurality of snap-in pieces, the limiting piece is arranged at the left and right edges of the nameplate body, and the snap-in pieces are arranged at the upper and lower edges of the nameplate body.

[0011] As a preferred solution, end buckles are provided at the left and right edges of the LCD display window, and multiple side buckles are provided at the upper and lower edges of the LCD display window. The end buckles cooperate with the limiting pieces, and the side buckles cooperate with the snap-in pieces.

[0012] As a preferred solution, a dial is also provided on the liquid crystal display window.

[0013] It can be seen from the technical solution provided by the above utility model that the three-phase four-wire electronic energy meter provided by the utility model has the following beneficial effects:

[0014] The connection mode between the adapter and the energy meter is set to plug-in. When the energy meter needs to be installed or replaced, there is no need to cut off the power supply, which will not interfere with the use of other electrical equipment. It is easy to install and operate.

[0015] A leakage protector is installed on the electricity meter, and a fault indicator light is set on the leakage protector, which can detect leakage of the electricity meter in time and facilitate maintenance personnel to inspect the electricity meter. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is the right side view of the three-phase four-wire electronic electric energy meter of the utility model;

[0017] Figure 2 This is a front view of the three-phase four-wire electronic electric energy meter of the utility model;

[0018] Figure 3 This is a schematic diagram of the adapter structure in the three-phase four-wire electronic electric energy meter of the present invention;

[0019] Figure 4 This is a schematic diagram of the structure of the electric energy meter in the three-phase four-wire electronic electric energy meter of the utility model;

[0020] Figure 5 This is a schematic diagram of the structure of the liquid crystal display in the three-phase four-wire electronic electric energy meter of the present invention;

[0021] Figure 6 This is a schematic diagram of the nameplate structure in the three-phase four-wire electronic electric energy meter of the present utility model.

[0022] In the figure: 1. Adapter; 2. Energy meter; 3. LCD display window; 4. Nameplate; 5. Dial; 6. Leakage protector; 7. Fault indicator light; 8. First sealing screw; 9. Second sealing screw; 10. Alarm; 11. Adapter unit current input jack; 12. Adapter unit current output jack; 13. Adapter neutral line N input jack; 21. Energy meter unit current input jack; 22. Energy meter unit current output jack; 23. Energy meter neutral line N input jack; 31. End buckle; 32. Side buckle; 41. Nameplate body; 42. Limiting piece; 43. Connecting piece. DETAILED DESCRIPTION

[0023] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0025] In the description of the present invention, it should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0026] Furthermore, 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 the technical features being referenced. Thus, features identified with "first" or "second" may explicitly or implicitly include one or more of such features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.

[0027] In order to better understand the above technical solution, the above technical solution will be described in detail below with reference to the accompanying drawings and specific implementation methods.

[0028] like Figure 1-4As shown, the embodiment of the present invention provides a three-phase four-wire electronic energy meter, including an adapter 1 and an energy meter 2. The adapter 1 is provided with an adapter primary current input jack 11, an adapter primary current output jack 12, and an adapter neutral line N input jack 13. The energy meter 2 is provided with an energy meter primary current input pin 21, an energy meter primary current output pin 22, and an energy meter neutral line N input pin 23. The primary current input pin 21 of the energy meter is plugged into the primary current input jack 11 of the adapter, the primary current output pin 22 of the energy meter is plugged into the primary current output jack 12 of the adapter, and the neutral line N input jack 23 of the energy meter is plugged into the neutral line N input jack 13 of the adapter.

[0029] A leakage protector 6 is provided on the side of the electric energy meter 2 , and a fault indicator light 7 and an alarm 10 are provided on the leakage protector 6 . The leakage display 6 , the fault indicator light 7 and the alarm 10 are connected in series with the electric energy meter 2 respectively.

[0030] It should be noted that the elementary current input pin 21 of the electric energy meter is plugged into the elementary current input jack 11 of the adapter, the elementary current output pin 22 of the electric energy meter is plugged into the elementary current output jack 12 of the adapter, and the neutral line N input jack 23 of the electric energy meter is plugged into the neutral line N input jack 13 of the adapter. When installing the electric energy meter 2, insert the pins on the electric energy meter 2 into the corresponding jacks on the upper box of the adapter 1. When the electric energy meter 2 needs to be inspected and replaced, just unplug the pins of the electric energy meter 2 from the jacks of the adapter 1. There is no need to turn off the power, and it will not affect the use of other electrical appliances. It has a simple structure and is easy to operate. A leakage protector 6 is provided, and a fault indicator light 7 and an alarm 10 are provided on the leakage protector 6. The fault indicator light 7 and the alarm 10 are respectively connected in series with the leakage protector 6. The fault indicator light 7 is green under normal power-on conditions. When the energy meter 2 leaks electricity, the leakage protector 6 overheats and trips, the fault indicator light 7 changes from green to red, and the alarm 10 sounds an alarm, so that maintenance personnel can find the leakage of the energy meter 2 in time and repair the energy meter 2 in time. When the energy meter 2 needs to be replaced, due to the reason of the pins of the energy meter 2 and the sockets of the adapter box 1, the energy meter 2 can be repaired and replaced without turning off the power.

[0031] As shown in the figure, the adapter 1 is provided with a first sealing screw 8 , and the electric energy meter 2 is provided with a second sealing screw 9 . The electric energy meter 2 is fixed to the first sealing screw 8 via the second sealing screw 9 .

[0032] It should be noted that the first sealing screw 8 and the second sealing screw 9 can fix and seal the energy meter 2 on the adapter 1, thereby fixing the energy meter 2 and preventing the energy meter 2 from falling off the adapter 1 due to long-term use.

[0033] As shown in the figure, a nameplate 4 is provided on the surface of the electric energy meter 2, and a detachable liquid crystal display window 3 is provided on the nameplate 4.

[0034] It should be noted that the LCD display window 3 can be used to observe the operating conditions of the internal components of the electricity meter 2. A detachable LCD display window 3 is set on the nameplate 4. The more common practice on the market is to fix the nameplate on the LCD display window by screws or hot melt methods. In the utility model, by setting a detachable LCD window 3, the damage to the nameplate 4 caused by screws or hot melt connection methods can be reduced, the production process is simplified, and the production cost is reduced.

[0035] As shown in the figure, the nameplate 4 includes a nameplate body 41, a limiting piece 42 and a plurality of snap-in pieces 43. The limiting piece 42 is arranged at the left and right edges of the nameplate body 41, and the snap-in pieces 43 are arranged at the upper and lower edges of the nameplate body 41.

[0036] It should be noted that the limiting piece 42 and the engaging piece 43 on the edge of the nameplate 4 are used for installation and fixation with the liquid crystal display window 3 .

[0037] As shown in the figure, end buckles 31 are provided at the left and right edges of the LCD display window 3, and multiple side buckles 32 are provided at the upper and lower edges of the LCD display window 3. The end buckles 31 cooperate with the limiting pieces 42, and the side buckles 32 cooperate with the snap-on pieces 43.

[0038] It should be noted that when installing the LCD window 3 on the nameplate 4, the nameplate 4 is squeezed from both ends toward the center along its length, causing it to bend and deform into an arc shape. Utilizing the elasticity of the nameplate 4, the engaging piece 43 is snapped into the side buckle 32, while the limiting piece 42 is snapped into the end buckle 31. At this point, the nameplate 4 returns to its original shape and fits the surface of the LCD window 3. When removing the nameplate 4, the nameplate 4 is similarly squeezed from both ends toward the center along its length, causing it to bend and deform, causing the limiting piece 42 to exit from the end buckle 31 and the engaging piece 43 to exit from the engaging piece 43. Removal is then completed.

[0039] As shown in the figure, a dial 5 is also provided on the liquid crystal display window 3 .

[0040] It should be noted that the dial 5 is used to observe the conditions of the various components inside the electric energy meter 2 .

[0041] The working principle of this embodiment is as follows: first, the adapter 1 is installed in the electricity meter box. When installing the electricity meter 2, the pins on the electricity meter 2 are inserted into the corresponding jacks on the adapter 1, and then the pins are pulled down firmly to make sure they are in place. The original connection piece of the adapter 1 is pushed open, and the electricity meter 2 is connected to the power grid to measure the user's electricity consumption. The electricity meter 2 is fixed and sealed to the adapter 1 with the second sealing screw 9. When the electricity meter 2 leaks electricity during operation, the leakage protector 6 overheats and trips, the fault indicator light 7 changes from green to red, and the alarm 10 sounds an alarm, making it convenient for maintenance personnel to promptly detect the leakage of the electricity meter 2 and to promptly repair the electricity meter 2. When installing the liquid crystal display window 3 on the nameplate 4, the nameplate 4 is squeezed from both ends toward the middle along the length direction of the nameplate 4 to bend and deform to form an arc shape. The elasticity of the nameplate 4 itself is used to snap the connecting piece 43 into the side buckle 32, and the limiting piece 42 is snapped into the end buckle 31. When disassembling, the nameplate 4 is squeezed from both ends toward the middle along the length direction of the nameplate 4 to bend and deform, so that the limiting piece 42 withdraws from the end buckle 31 and the connecting piece 43 withdraws from the connecting piece 43.

[0042] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A three-phase four-wire electronic electric energy meter, comprising an adapter (1) and an electric energy meter (2), characterized in that: The adapter (1) is provided with an adapter primary current input jack (11), an adapter primary current output jack (12) and an adapter neutral line N input jack (13); the electric energy meter (2) is provided with an electric energy meter primary current input pin (21), an electric energy meter primary current output pin (22) and an electric energy meter neutral line N input jack (23); the primary current input pin (21) of the electric energy meter is plugged into the primary current input jack (11) of the adapter, the primary current output pin (22) of the electric energy meter is plugged into the primary current output jack (12) of the adapter, and the neutral line N input jack (23) of the electric energy meter is plugged into the neutral line N input jack (13) of the adapter; A leakage protector (6) is provided on the side of the electric energy meter (2), and a fault indicator light (7) and an alarm (10) are provided on the leakage protector (6). The leakage protector (6), the fault indicator light (7) and the alarm (10) are respectively connected in series with the electric energy meter (2).

2. The three-phase four-wire electronic energy meter according to claim 1, characterized in that: The adapter (1) is provided with a first lead sealing screw (8), the electric energy meter (2) is provided with a second lead sealing screw (9), and the adapter (1) is fixed to the second lead sealing screw (9) of the electric energy meter (2) via the first lead sealing screw (8).

3. The three-phase four-wire electronic electric energy meter according to claim 1, characterized in that: A nameplate (4) is provided on the surface of the electric energy meter (2), and a detachable liquid crystal display window (3) is provided on the nameplate (4).

4. The three-phase four-wire electronic energy meter according to claim 3, characterized in that: The nameplate (4) comprises a nameplate body (41), a limiting piece (42) and a plurality of connecting pieces (43), wherein the limiting piece (42) is arranged at the left and right edges of the nameplate body (41), and the connecting pieces (43) are arranged at the upper and lower edges of the nameplate body (41).

5. The three-phase four-wire electronic electric energy meter according to claim 4, characterized in that: End buckles (31) are provided at the left and right edges of the liquid crystal display window (3), and a plurality of side buckles (32) are provided at the upper and lower edges of the liquid crystal display window (3). The end buckles (31) cooperate with the limiting pieces (42), and the side buckles (32) cooperate with the snap-on pieces (43).

6. The three-phase four-wire electronic electric energy meter according to claim 3, characterized in that: A dial (5) is also provided on the liquid crystal display window (3).

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