Three-phase electric energy meter active and reactive combined vector diagram ruler

Abstract

The utility model discloses an active and reactive combined vector diagram ruler for a three-phase electric energy meter, which comprises a dial plate, an active electric parameter pointer group, a reactive electric parameter pointer group, a gear group, an active electric parameter bearing group and a reactive electric parameter bearing group, the active / reactive electric parameter pointer group comprises n active / reactive electric parameter pointers, the active / reactive electric parameter bearing group comprises n active / reactive electric parameter bearings which are coaxially nested, the gear group comprises n gear layers, and each gear layer comprises a first gear, a second gear and a third gear which are sequentially meshed, one end of each active / reactive electric parameter bearing is connected with the corresponding electric parameter pointer, the other end of each active / reactive electric parameter bearing is connected with the first gear / third gear of the corresponding gear layer, and the active electric parameter pointer and the corresponding reactive electric parameter pointer have an angle difference between the corresponding active electric parameter and the corresponding reactive electric parameter. According to the utility model, active and reactive vector diagrams can be displayed at the same time.

Description

Technical Field

[0001] This utility model relates to a vector diagram ruler, and more particularly to a three-phase energy meter reactive power combination vector diagram ruler. Background Technology

[0002] When determining the correctness of wiring in an electricity metering device, vector diagrams are used to analyze the voltage and current relationships on power components, thereby assessing the wiring and operational status of the metering device. Vector diagrams are manually drawn based on measurements from equipment such as phase volt-ammeters, electrical testing instruments, and field inspection instruments. Even with devices equipped with automatic drawing functions, manual drawing is still necessary to hypothesize possible incorrect wiring configurations. Furthermore, the analysis process may require drawing multiple possible vector diagrams, such as reversing the current direction or rotating the diagram by an angle, making this work extremely inconvenient in the field.

[0003] Patent application number 201621239828.3 discloses a training diagram for electrical energy metering wiring vector analysis, including a display board, a load hexagon diagram with scale lines on the display board, and at least one adjustable angle pointer arranged radially along the load hexagon diagram. One end of the adjustable angle pointer is located at the center of the load hexagon diagram and is rotatably connected to the display board. However, this diagram can only display one vector diagram and cannot display active and reactive power vector diagrams simultaneously. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this utility model is to provide a three-phase energy meter reactive power combination vector diagram ruler.

[0005] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0006] A three-phase energy meter with a reactive power vector diagram scale is characterized by comprising a dial, an active power parameter pointer group, a reactive power parameter pointer group, a gear group, an active power parameter bearing group, and a reactive power parameter bearing group. The dial displays active power vector diagram and reactive power vector diagram scales. The active power parameter pointer group includes n active power parameter pointers, the reactive power parameter pointer group includes n reactive power parameter pointers, the active power parameter bearing group includes n coaxially nested active power parameter bearings, and the reactive power parameter bearing group includes n coaxially nested reactive power parameter bearings. The gear group includes... It includes n gear layers, each gear layer corresponding to an electrical parameter. Each gear layer includes a first gear, a second gear, and a third gear meshing in sequence. One end of each active electrical parameter bearing is connected to the corresponding active electrical parameter pointer, and the other end passes through the center point of the active power vector diagram and connects to the first gear of the corresponding gear layer. One end of each reactive electrical parameter bearing is connected to the corresponding reactive electrical parameter pointer, and the other end passes through the center point of the reactive power vector diagram and connects to the third gear of the corresponding gear layer. There is an angle difference between the active electrical parameter pointer and the corresponding reactive electrical parameter pointer, where n is a positive integer.

[0007] Furthermore, the two ends of the active power parametric bearing are located on both sides of the dial, and the length protruding from both sides of the dial increases as the radius decreases. The two ends of the reactive power parametric bearing are located on both sides of the dial, and the length protruding from both sides of the dial increases as the radius decreases.

[0008] Furthermore, the active power parameter pointer group includes an A-phase-B phase active voltage pointer, a C-phase-B phase active voltage pointer, an A-phase active current pointer, and a C-phase active current pointer, and the reactive power parameter pointer group includes an A-phase-B phase reactive voltage pointer, a C-phase-B phase reactive voltage pointer, an A-phase reactive current pointer, and a C-phase reactive current pointer.

[0009] Furthermore, the gear set includes an A-phase-B-phase voltage gear layer, a C-phase-B-phase voltage gear layer, an A-phase current gear layer, and a C-phase current gear layer.

[0010] Furthermore, the active power parameter bearing group includes an A-phase-B phase active voltage bearing, a C-phase-B phase active voltage bearing, an A-phase active current bearing, and a C-phase active current bearing. The reactive power parameter bearing group includes an A-phase-B phase reactive voltage bearing, a C-phase-B phase reactive voltage bearing, an A-phase reactive current bearing, and a C-phase reactive current bearing. One end of the A-phase-B phase active voltage bearing is connected to the A-phase-B phase active voltage pointer, and the other end is connected to the first gear of the A-phase-B phase voltage gear layer. One end of the C-phase-B phase active voltage bearing is connected to the C-phase-B phase active voltage pointer, and the other end is connected to the first gear of the C-phase-B phase voltage gear layer. One end of the A-phase active current bearing is connected to the A-phase active current pointer, and the other end is connected to the first gear of the A-phase-B phase active voltage gear layer. One end of the C-phase active current bearing is connected to the C-phase active current pointer, and the other end is connected to the first gear of the C-phase active current gear layer. One end of the A-phase-B phase reactive voltage bearing is connected to the A-phase-B phase reactive voltage pointer, and the other end is connected to the third gear of the A-phase-B phase voltage gear layer. One end of the C-phase-B phase reactive voltage bearing is connected to the C-phase-B phase reactive voltage pointer, and the other end is connected to the third gear of the C-phase-B phase voltage gear layer. One end of the A-phase reactive current bearing is connected to the A-phase reactive current pointer, and the other end is connected to the third gear of the A-phase-B phase reactive voltage gear layer. One end of the C-phase reactive current bearing is connected to the C-phase reactive current pointer, and the other end is connected to the third gear of the C-phase reactive current gear layer.

[0011] Furthermore, both the active power vector graph scale and the reactive power vector graph scale are circular, each containing 36 angular increments.

[0012] Furthermore, the angle of the active voltage pointer of phase A-phase-B phase leads the reactive voltage pointer of phase A-phase-B phase by 90 degrees, the angle of the active voltage pointer of phase C-phase-B phase leads the reactive voltage pointer of phase C-phase-B phase by 90 degrees, the angle of the active current pointer of phase A phase is the same as that of the reactive current pointer of phase A phase, and the angle of the active current pointer of phase C phase is the same as that of the reactive current pointer of phase C phase.

[0013] Furthermore, it also includes a housing, which is mounted on the bottom of the dial and encloses the gear set.

[0014] Furthermore, the pointers of the active power parameter pointer group and the reactive power parameter pointer group use different lengths and / or colors to distinguish the corresponding power parameters.

[0015] Compared with the prior art, the advantages of this utility model are: this utility model can display active power vector diagram and reactive power vector diagram at the same time, and the pointers of active power vector diagram and reactive power vector diagram are linked. When in use, only one pointer needs to be moved to display active power vector diagram and reactive power vector diagram at the same time, which is convenient to operate and increases user work efficiency. Attached Figure Description

[0016] Figure 1 This is a front view of the reactive power combination vector diagram ruler of the three-phase energy meter provided in this embodiment of the utility model;

[0017] Figure 2 This is a side view of the reactive power combination vector diagram ruler of the three-phase energy meter provided in this embodiment of the utility model;

[0018] Figure 3 This is a three-dimensional schematic diagram of the reactive power combination vector diagram ruler of the three-phase energy meter provided in this embodiment of the utility model;

[0019] Figure 4 This is a schematic diagram of the active power parameter bearing assembly provided in this embodiment of the utility model;

[0020] Figure 5 It is the angle between the active power vector diagram and the reactive power vector diagram provided in this embodiment of the utility model. Detailed Implementation

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0022] This utility model embodiment provides a three-phase energy meter with a reactive power combination vector diagram ruler, such as... Figure 1 , 2As shown in Figures 1 and 3, the device includes a dial 1, an active power parameter pointer group 2, a reactive power parameter pointer group 3, a gear group 4, an active power parameter bearing group 5, a reactive power parameter bearing group 6, and a housing 7. The dial 1 displays an active power vector diagram scale 1-1 and a reactive power vector diagram scale 1-2. Both scales are circular with 36 angular graduations, each representing 10 degrees. U1, U2, and U3 represent the voltages of phases A, B, and C, respectively. Active power parameter pointer group 2 includes A-phase-B phase active voltage pointer 2-1, C-phase-B phase active voltage pointer 2-2, A-phase active current pointer 2-3, and C-phase active current pointer 2-4. Reactive power parameter pointer group 3 includes A-phase-B phase reactive voltage pointer 3-1, C-phase-B phase reactive voltage pointer 3-2, A-phase reactive current pointer 3-3, and C-phase reactive current pointer 3-4. The pointers in active power parameter pointer group 2 and reactive power parameter pointer group 3 use different lengths and colors to distinguish the corresponding electrical parameters. Gear group 4 includes A-phase-B phase voltage gear layer 4-1, C-phase-B phase voltage gear layer 4-2, A-phase current gear layer 4-3, and C-phase current gear layer 4-4. That is, each electrical parameter uses one gear layer. Each gear layer includes a first gear, a second gear, and a third gear that mesh sequentially. The first gear is connected to the active power parameter pointer via a bearing, and the third gear is connected to the reactive power parameter pointer via a bearing. The outer casing 7 is mounted on the bottom of the dial 1, enclosing the gear set 4.

[0023] like Figure 4As shown, the active power parameter bearing assembly 5 includes, from the inside out, coaxially nested C-phase active current bearing 5-4, A-phase-B-phase active voltage bearing 5-1, C-phase-B-phase active voltage bearing 5-2, and A-phase active current bearing 5-3, with the bearing radii increasing sequentially. The two ends of each bearing are located on both sides of the dial 1, and the length protruding from both sides of the dial 1 increases as the radius decreases. That is, the lengths of the C-phase active current bearing 5-4, A-phase-B-phase active voltage bearing 5-1, C-phase-B-phase active voltage bearing 5-2, and A-phase active current bearing 5-3 increase sequentially, thus ensuring that both ends of each bearing can protrude to install corresponding devices. One end of the A-phase-B phase active voltage bearing 5-1 is connected to the A-phase-B phase active voltage pointer 2-1, and the other end passes through the center point of the active power vector diagram scale 1-1 and connects to the first gear of the A-phase-B phase voltage gear layer 4-1. One end of the C-phase-B phase active voltage bearing 5-2 is connected to the C-phase-B phase active voltage pointer 2-2, and the other end passes through the center point of the active power vector diagram scale 1-1 and connects to the first gear of the C-phase-B phase voltage gear layer 4-2. One end of the A-phase active current bearing 5-3 is connected to the A-phase active current pointer 2-3, and the other end passes through the center point of the active power vector diagram scale 1-1 and connects to the first gear of the A-phase-B phase active voltage gear layer 4-3. One end of the C-phase active current bearing 5-4 is connected to the C-phase active current pointer 2-4, and the other end passes through the center point of the active power vector diagram scale 1-1 and connects to the first gear of the C-phase active current gear layer 4-4. The connection relationship of the reactive power parameter bearing group 6 is similar to that of the active power parameter bearing group 5, except that the other end of the bearing is connected to the third gear, so it will not be described in detail. When the active power parameter pointer is moved, the first gear rotates, driving the second gear to rotate, which in turn drives the third gear to rotate. The corresponding reactive power parameter pointer will also rotate, thus synchronizing the active and reactive power parameter pointers. The same applies when the reactive power parameter pointer is moved. Therefore, by simply moving either the reactive or active power pointer, the vector diagrams of both active and reactive power can be obtained simultaneously. The corresponding gears in the four gear layers are installed coaxially, working independently without affecting each other.

[0024] Pointers during installation, such as Figure 5 As shown, there is an angle difference between the active power parameter pointer and the corresponding reactive power parameter pointer. Specifically, the angle of the A-phase-B phase active voltage pointer 2-1 leads the A-phase-B phase reactive voltage pointer 3-1 by 90 degrees, the angle of the C-phase-B phase active voltage pointer 2-2 leads the C-phase-B phase reactive voltage pointer 3-2 by 90 degrees, the angles of the A-phase active current pointer 2-3 and the A-phase reactive current pointer 3-3 are the same, and the angles of the C-phase active current pointer 2-4 and the C-phase reactive current pointer 3-4 are the same. This ensures that the correspondence between the active power parameter pointer and the corresponding reactive power parameter pointer remains correct regardless of how the pointers are rotated.

[0025] The dial 1 and the casing 7 can be made of any material suitable for the operation, such as acrylic sheet or stainless steel sheet.

[0026] It is understood that in other embodiments, the number and type of pointers included in the active power parameter pointer group 2 and the reactive power parameter pointer group 3 can be varied as needed. For example, the active power parameter pointer group 2 may include only one or more of the following: A-phase-B phase active voltage pointer 2-1, C-phase-B phase active voltage pointer 2-2, A-phase active current pointer 2-3, and C-phase active current pointer 2-4. Other types of power parameter pointers can also be added. The same applies to the reactive power parameter pointer group 3. The corresponding number of gear groups and bearing groups can be varied accordingly. The pointers in the active power parameter pointer group 2 and the reactive power parameter pointer group 3 can also be distinguished by different lengths or by different colors.

[0027] It should be understood that the above embodiments and descriptions are only the principles, main features and advantages of this utility model. Various changes and improvements may be made to this utility model without departing from the spirit and scope of this utility model, and all such changes and improvements fall within the protection scope of this utility model.

Claims

1. A three-phase energy meter with a reactive power combination vector diagram ruler, characterized in that, The system includes a dial, an active power parameter pointer group, a reactive power parameter pointer group, a gear set, an active power parameter bearing group, and a reactive power parameter bearing group. The dial displays active power vector diagrams and reactive power vector diagrams. The active power parameter pointer group includes n active power parameter pointers, the reactive power parameter pointer group includes n reactive power parameter pointers, the active power parameter bearing group includes n coaxially nested active power parameter bearings, the reactive power parameter bearing group includes n coaxially nested reactive power parameter bearings, and the gear set includes n gear layers, each layer containing gears... Each layer corresponds to an electrical parameter. Each gear layer includes a first gear, a second gear, and a third gear that mesh sequentially. One end of each active electrical parameter bearing is connected to the corresponding active electrical parameter pointer, and the other end passes through the center point of the active power vector diagram and connects to the first gear of the corresponding gear layer. One end of each reactive electrical parameter bearing is connected to the corresponding reactive electrical parameter pointer, and the other end passes through the center point of the reactive power vector diagram and connects to the third gear of the corresponding gear layer. There is an angle difference between the active electrical parameter pointer and the corresponding reactive electrical parameter pointer, where n is a positive integer.

2. The three-phase energy meter according to claim 1 has a reactive power combination vector diagram ruler, characterized in that, The two ends of the active power parametric bearing are located on both sides of the dial, and the length protruding from both sides of the dial increases as the radius decreases. The two ends of the reactive power parametric bearing are located on both sides of the dial, and the length protruding from both sides of the dial increases as the radius decreases.

3. The three-phase energy meter according to claim 1 has a reactive power combination vector diagram ruler, characterized in that, The active power parameter pointer group includes the A-phase-B phase active voltage pointer, the C-phase-B phase active voltage pointer, the A-phase active current pointer, and the C-phase active current pointer. The reactive power parameter pointer group includes the A-phase-B phase reactive voltage pointer, the C-phase-B phase reactive voltage pointer, the A-phase reactive current pointer, and the C-phase reactive current pointer.

4. The three-phase energy meter according to claim 3 has a reactive power combination vector diagram ruler, characterized in that, The gear set includes an A-phase-B-phase voltage gear layer, a C-phase-B-phase voltage gear layer, an A-phase current gear layer, and a C-phase current gear layer.

5. The three-phase energy meter according to claim 4 has a reactive power combination vector diagram ruler, characterized in that, The active power parameter bearing group includes an A-phase-B phase active voltage bearing, a C-phase-B phase active voltage bearing, an A-phase active current bearing, and a C-phase active current bearing. The reactive power parameter bearing group includes an A-phase-B phase reactive voltage bearing, a C-phase-B phase reactive voltage bearing, an A-phase reactive current bearing, and a C-phase reactive current bearing. One end of the A-phase-B phase active voltage bearing is connected to the A-phase-B phase active voltage pointer, and the other end is connected to the first gear of the A-phase-B phase voltage gear layer. One end of the C-phase-B phase active voltage bearing is connected to the C-phase-B phase active voltage pointer, and the other end is connected to the first gear of the C-phase-B phase voltage gear layer. One end of the A-phase active current bearing is connected to the A-phase active current pointer, and the other end is connected to the first gear of the A-phase-B phase active voltage gear layer. One end of the C-phase active current bearing is connected to the C-phase active current pointer, and the other end is connected to the first gear of the C-phase active current gear layer. One end of the A-phase-B phase reactive voltage bearing is connected to the A-phase-B phase reactive voltage pointer, and the other end is connected to the third gear of the A-phase-B phase voltage gear layer. One end of the C-phase-B phase reactive voltage bearing is connected to the C-phase-B phase reactive voltage pointer, and the other end is connected to the third gear of the C-phase-B phase voltage gear layer. One end of the A-phase reactive current bearing is connected to the A-phase reactive current pointer, and the other end is connected to the third gear of the A-phase-B phase reactive voltage gear layer. One end of the C-phase reactive current bearing is connected to the C-phase reactive current pointer, and the other end is connected to the third gear of the C-phase reactive current gear layer.

6. The three-phase energy meter according to claim 1 has a reactive power combination vector diagram ruler, characterized in that, Both the active power vector graph scale and the reactive power vector graph scale are circular, each containing 36 angular divisions.

7. The three-phase energy meter according to claim 3 has a reactive power combination vector diagram ruler, characterized in that, The angle of the active voltage pointer of phase A-B leads the reactive voltage pointer of phase A-B by 90 degrees, the angle of the active voltage pointer of phase C-B leads the reactive voltage pointer of phase C-B by 90 degrees, the angle of the active current pointer of phase A and the reactive current pointer of phase A are the same, and the angle of the active current pointer of phase C and the reactive current pointer of phase C are the same.

8. The three-phase energy meter according to claim 1 has a reactive power combination vector diagram ruler, characterized in that, It also includes a housing, which is mounted on the bottom of the dial and encloses the gear set.

9. The three-phase energy meter according to claim 1 has a reactive power combination vector diagram ruler, characterized in that, The pointers of the active power parameter pointer group and the reactive power parameter pointer group are distinguished by different lengths and / or colors.

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