Electric energy metering module and assembling method thereof

Abstract

The invention discloses an electric energy metering module which comprises a first shell, a second shell, a mutual inductor, a wire pressing frame assembly, a copper bar, a temperature sensor and a circuit board. A wire pressing frame assembly groove is formed in the first shell, and the wire pressing frame assembly is arranged in the wire pressing frame assembly groove; a mutual inductor groove is formed in the front side of the wire pressing frame assembly groove in the first shell, and a mutual inductor is arranged in the mutual inductor groove. A copper bar groove is formed in the center of the mutual inductor groove, the copper bar groove is communicated with the wire pressing frame assembly groove, and a copper bar extends into the wire pressing frame assembly groove through the copper bar groove and is placed in the wire pressing frame assembly; circuit board grooves are formed in the two side walls of the first shell, and the circuit board is inserted through the circuit board grooves; a gap is arranged below the copper bar groove, and the temperature sensor is arranged at the gap. The mutual inductor, the copper bar and the temperature sensor are all connected with the circuit board to collect a current signal, a voltage signal and a temperature signal; copper bar holes are formed in the second shell in a penetrating mode, and when the second shell is installed on the first shell, the copper bars penetrate out of the copper bar holes respectively.

Description

Technical Field

[0001] This invention relates to the field of electrical equipment technology, and in particular to an energy metering module and its assembly method. Background Technology

[0002] In multi-circuit power distribution systems, energy consumption needs to be metered individually for each circuit to achieve energy consumption monitoring and management. In existing technologies, each distribution circuit requires a three-phase energy meter and a current transformer to be installed at the downstream end of a three-phase miniature circuit breaker (for circuit protection) to complete the energy metering function.

[0003] This traditional configuration scheme has the following drawbacks: High cost: Each circuit requires the separate purchase of a three-phase energy meter, current transformer and matching wiring accessories, resulting in a high overall equipment purchase cost.

[0004] Complex wiring: Multiple sets of lines need to be connected between the energy meter and the current transformer and miniature circuit breaker. The wiring steps are complicated, and wiring errors are easy to occur, which increases the difficulty of debugging.

[0005] Large space occupation: Electricity meters and current transformers are independent components, requiring separate installation space in the distribution box, which increases the size of the distribution box. This space occupation problem is even more prominent in multi-circuit scenarios. Summary of the Invention

[0006] This invention addresses the problems and shortcomings of existing technologies by providing a novel power metering module and its assembly method.

[0007] The present invention solves the above-mentioned technical problems through the following technical solution: This invention provides an energy metering module, including a first housing, a second housing, a current transformer, a wire frame assembly, a copper busbar, a temperature sensor, and a circuit board; The wire clamping frame assembly consists of three sets. The rear side of the first housing has three wire clamping frame assembly slots arranged side by side vertically corresponding to the three sets of wire clamping frame assembly assemblies. The three sets of wire clamping frame assembly assemblies are inserted into the three wire clamping frame assembly slots from below. The top of the first housing has a locking screw hole that passes through the wire clamping frame assembly slots, and the rear side of the first housing has a wiring hole that passes through the wire clamping frame assembly slots. There are three current transformers. The front side of the pressure frame assembly slot in the first housing is provided with three current transformer slots arranged side by side corresponding to the three current transformers. The three current transformers are inserted into the three current transformer slots from the front side. There are three copper busbars. The center of the current transformer slot is provided with a copper busbar slot corresponding to the copper busbar. The copper busbar slot is connected to the pressure frame assembly slot. The copper busbar extends from the front side through the copper busbar slot into the pressure frame assembly slot and is placed into the pressure frame assembly. The first housing has circuit board slots on both sides of the horizontal direction. The circuit board slots are located below the current transformer slots. The circuit board is inserted into the first housing through the circuit board slots. There are three temperature sensors. A notch is provided below the copper busbar groove. The inner wall of the current transformer, the notch, and the copper busbar form a receiving cavity, and the temperature sensors are placed in the receiving cavity. The copper busbar is provided with a voltage signal terminal, the circuit board is provided with a signal interface, and the current transformer, the voltage signal terminal and the temperature sensor are all electrically connected to the signal interface of the circuit board to collect current signal, voltage signal and temperature signal; The second housing has three copper busbar holes corresponding to the copper busbars. When the second housing is installed on the first housing, the three copper busbars pass through the copper busbar holes to connect to the three-phase circuit breaker.

[0008] Preferably, a data interface is provided on the upper part of one end of the circuit board near the rear side of the first housing; a data interface slot is provided through the top of the rear side of the first housing, and an external data transmission line is connected to the data interface via the data interface slot.

[0009] Preferably, the second housing is in the shape of an inverted L, and the second housing has a vertical wall and a bottom plate. The second housing covers the first housing from the front and bottom, the vertical wall closes the front of the first housing, and the bottom plate closes the bottom of the first housing.

[0010] Preferably, the copper busbar hole is provided in the vertical wall, and a circuit board positioning groove is provided in the lower part of the inner side of the vertical wall. When the second housing is installed into the first housing, the end of the circuit board is located in the circuit board positioning groove.

[0011] Preferably, the two ends of the vertical wall of the second housing are provided with buckles, and the front side of the two side walls of the first housing is provided with buckle grooves that match the buckles. The first housing and the second housing are connected by the buckles and the buckle grooves.

[0012] Based on the same concept, the present invention also provides a method for assembling the above-mentioned power metering module, comprising the following steps: A first housing and three current transformers are provided, and the current transformers are sequentially installed into the current transformer slots of the first housing; Three sets of wire clamping frame assemblies are provided, and the wire clamping frame assemblies are sequentially installed into the wire clamping frame assembly slots of the first housing; Three copper busbars are provided, and the copper busbars are sequentially inserted into the wire clamping frame assembly slot through the copper busbar groove and fixed in the wire clamping frame assembly, while maintaining good contact with the wire clamping frame assembly. A temperature sensor is provided and installed in the cavity formed by the inner wall of the current transformer, the notch of the copper busbar groove, and the copper busbar, so that the temperature sensor is in contact with the lower end face of the copper busbar. A circuit board is provided, and the circuit board is installed into the first housing along the circuit board slot of the first housing; A second housing is provided, which is then fitted onto the first housing from the front and bottom. The copper busbar extends from the copper busbar hole of the second housing, and the end of the circuit board is placed in the circuit board positioning groove. The latch of the second housing is engaged with the latch groove of the first housing to complete the installation.

[0013] Based on the same concept, the present invention also provides a protection metering device, including multiple sets of protection metering components and a monitoring host. The protection metering components include a three-phase circuit breaker and the aforementioned power metering module. The copper busbar of the power metering module is inserted into the output terminal of the three-phase circuit breaker and locked to form the protection metering component. The monitoring host and multiple sets of the protection metering components are arranged sequentially. The monitoring host is connected to the data interfaces of multiple power metering modules sequentially through data transmission lines.

[0014] The positive and progressive effects of this invention are as follows: The energy metering module provided by this invention integrates current acquisition (current transformer), voltage acquisition (copper busbar), temperature monitoring (temperature sensor), and energy metering (circuit board) functions, eliminating the need for an additional energy meter and simplifying equipment composition. Installation is convenient; the module size matches three-phase miniature circuit breakers and can be directly assembled with them as a protection and metering component, reducing wiring steps. In multi-circuit scenarios, only batch installation of protection and metering components is required, improving construction efficiency. It saves space; the integrated structure replaces the traditional dispersed configuration of "miniature circuit breaker + energy meter + current transformer," significantly reducing installation space in the distribution box and facilitating miniaturized design of the power distribution system. It also reduces costs by decreasing the number of independent devices required and lowering labor costs for wiring and debugging, thus reducing the overall metering configuration cost of the power distribution circuit. Attached Figure Description

[0015] Figure 1 This is an exploded view of the power metering module according to an embodiment of the present invention; Figures 2(a)-(c) are schematic diagrams of the first shell structure according to an embodiment of the present invention; Figures 3(a)-(b) are schematic diagrams of the second shell structure according to an embodiment of the present invention; Figures 4(a)-(g) are schematic diagrams of the assembly process of the power metering module according to an embodiment of the present invention; Figures 5(a)-(c) are schematic diagrams of the current transformer, wire frame assembly and copper busbar installed in the first housing according to an embodiment of the present invention; Figures 6(a)-(d) are schematic diagrams of the assembly process of the protective metering device according to an embodiment of the present invention. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Please see Figure 1 Figure 5 shows an energy metering module provided in this embodiment, which includes a first housing 1, a second housing 2, a current transformer 3, a wire frame assembly 4, a copper busbar 5, a temperature sensor 6, and a circuit board 7.

[0018] The wire clamping frame assembly 4 consists of three sets. The rear side of the first housing 1 has three wire clamping frame assembly slots 1d arranged vertically side by side for the three sets of wire clamping frame assembly 4. The three sets of wire clamping frame assembly 4 are inserted into the three wire clamping frame assembly slots 1d from below. The top of the first housing 1 has a locking screw hole 1e that passes through the wire clamping frame assembly slot 1d. The rear side of the first housing 1 has a wiring hole 1f that passes through the wire clamping frame assembly slot 1d.

[0019] There are three current transformers 3. In the first housing 1, the front side of the voltage frame assembly slot 1d is provided with three current transformer slots 1a, which are arranged side by side with the three current transformers 3. The three current transformers 3 are inserted into the three current transformer slots 1a from the front side.

[0020] There are three copper busbars 5. The center of the transformer slot 1a is provided with a copper busbar slot 1b corresponding to the copper busbar 5. The copper busbar slot 1b is connected to the wire frame assembly slot 1d. The copper busbar 5 extends from the front through the copper busbar slot 1b into the wire frame assembly slot 1b and is placed into the wire frame assembly 4.

[0021] The two side walls of the first housing 1 are provided with circuit board slots 1g in the horizontal direction. The circuit board slots 1g are located below the transformer slots 1a. The circuit board 7 is inserted into the first housing 1 through the circuit board slots 1g, as shown in Figures 5(a) and 5(b).

[0022] There are three temperature sensors 6. A notch 1c is provided below the copper busbar groove 1b. The inner wall of the current transformer 3, the notch 1c and the copper busbar 5 form a receiving cavity, as shown in Figure 5(b). The temperature sensors 6 are placed in the receiving cavity.

[0023] The copper busbar 5 is equipped with a voltage signal terminal, and the circuit board 7 is equipped with a signal interface 7a. The current transformer 3, the voltage signal terminal, and the temperature sensor 6 are all electrically connected to the signal interface 7a of the circuit board 7 to collect current signals, voltage signals, and temperature signals.

[0024] The second housing 2 has three copper busbar holes 2a corresponding to the copper busbar 5. When the second housing 2 is installed on the first housing 1, the three copper busbars 5 pass through the copper busbar holes 2a respectively to connect the three-phase circuit breaker.

[0025] In some embodiments, a data interface 7b is provided on the upper part of one end of the circuit board 7 near the rear side of the first housing 1; a data interface slot 1h is provided through the top of the rear side of the first housing 1, and the external data transmission line 104 is connected to the data interface 7b via the data interface slot 1h.

[0026] In some embodiments, the second housing 2 is in the shape of an inverted L, and the second housing 2 specifically has a vertical wall and a bottom plate. The second housing 2 covers the first housing 1 from the front side and the bottom part, the vertical wall closes the front side of the first housing 1, and the bottom plate closes the bottom of the first housing 1.

[0027] In some embodiments, copper busbar holes 2a are provided in a vertical wall, and a circuit board positioning groove 2b is provided in the lower part of the inner side of the vertical wall. When the second housing 2 is installed into the first housing 1, the end of the circuit board 7 is located in the circuit board positioning groove 2b.

[0028] In some embodiments, the two ends of the vertical wall of the second housing 2 are provided with buckles 2c, and the front side of the two side walls of the first housing 1 is provided with buckle grooves 1i that match the buckles 2c. The first housing 1 and the second housing 2 are connected by buckles 2c and buckle grooves 1i.

[0029] Please refer to Figure 4. The present invention also provides a method for assembling the above-mentioned power metering module, comprising the following steps: A first housing 1 and three current transformers 3 are provided, and the current transformers 3 are sequentially installed into the current transformer slots 1a of the first housing 1.

[0030] Three sets of wire pressing frame assemblies 4 are provided, and the wire pressing frame assemblies 4 are sequentially installed into the wire pressing frame assembly slot 1d of the first housing 1.

[0031] Three copper busbars 5 are provided. The copper busbars 5 are inserted into the wire frame assembly slot 1d through the copper busbar slot 1b and fixed in the wire frame assembly 4, and maintain good contact with the wire frame assembly 4, as shown in Figure 5(b).

[0032] A temperature sensor 6 is provided and installed in the cavity formed by the inner wall of the current transformer 3, the notch 1c of the copper busbar groove 1b and the copper busbar 5, so that the temperature sensor 6 is in contact with the lower end face of the copper busbar 5, as shown in Figure 5(c).

[0033] A circuit board 7 is provided, and the circuit board 7 is installed into the first housing 1 along the circuit board groove 1g of the first housing 1.

[0034] A second housing 2 is provided, which is then fitted onto the first housing 1 from the front and bottom. A copper busbar 5 extends from the copper busbar hole 2a of the second housing 2, and the end of the circuit board 7 is placed in the circuit board positioning groove 2b. The latch 2c of the second housing 2 is fastened to the latch groove 1i of the first housing 1 to complete the installation.

[0035] Please refer to Figure 6. The present invention also provides a protection metering device, including multiple sets of protection metering components 103 and a monitoring host 105. The protection metering component 103 includes a three-phase circuit breaker 102 and the aforementioned energy metering module 101. The copper busbar 5 of the energy metering module 101 is inserted into the output terminal of the three-phase circuit breaker 102 and locked to form the protection metering component 103. The monitoring host 105 and the multiple sets of protection metering components 103 are arranged in sequence. The monitoring host 105 is connected to the data interface 7b of the multiple energy metering modules 101 in sequence through the data transmission line 104.

[0036] In summary, the power metering module provided by this invention adopts a compact structural design that integrates signal acquisition and power metering functions, and also integrates temperature monitoring functions. Its design size is compatible with three-phase circuit breakers, and it can be assembled with three-phase circuit breakers to form a protection metering component 103. It occupies little space, is easy to install, and can replace the traditional power distribution circuit metering configuration scheme, reducing costs, simplifying installation, and improving construction efficiency.

[0037] While specific embodiments of the present invention have been described above, those skilled in the art should understand that these are merely illustrative examples, and the scope of protection of the present invention is defined by the appended claims. Those skilled in the art can make various changes or modifications to these embodiments without departing from the principles and essence of the present invention, but all such changes and modifications fall within the scope of protection of the present invention.

Claims

1. An electrical energy metering module, characterized by The first shell, the second shell, the mutual inductor, the wire pressing frame assembly, the copper bar, the temperature sensor and the circuit board are included. The first shell has three wire pressing frame assembly slots corresponding to the three wire pressing frame assemblies, and the three wire pressing frame assemblies are placed in the three wire pressing frame assembly slots from below. The first shell has three mutual inductor slots corresponding to the three mutual inductors, and the three mutual inductors are placed in the three mutual inductor slots from the front. The first shell has three copper bar slots corresponding to the three copper bars, and the three copper bars are placed in the three copper bar slots from the front. The first shell has two circuit board slots corresponding to the two circuit boards, and the two circuit boards are placed in the two circuit board slots from below. The second shell has three copper bar holes corresponding to the three copper bars, and the three copper bars are placed in the three copper bar holes when the second shell is installed on the first shell. The second shell has a data interface slot corresponding to the data interface, and the data interface is connected to the external data transmission line through the data interface slot. The second shell has a vertical wall and a bottom plate, and the second shell is connected to the first shell from the front and the bottom.

2. The electrical energy metering module of claim 1, wherein, The second shell has a circuit board positioning slot corresponding to the circuit board, and the end of the circuit board is placed in the circuit board positioning slot when the second shell is installed on the first shell.

3. The electric energy metering module of claim 1, wherein, The second shell has a buckle on both ends of the vertical wall, and the first shell has a buckle slot on the front side of the two side walls.

4. The electrical energy metering module of claim 3, wherein, The first shell and the second shell are connected through the buckle and the buckle slot.

5. The electrical energy metering module of claim 3, wherein, The first shell and the three mutual inductors are provided, and the mutual inductors are sequentially installed in the mutual inductor slots of the first shell.

6. A method of assembling an electrical energy metering module as claimed in any one of claims 1 to 5, characterised in that, ​ ​ Three sets of wire pressing frame assemblies are provided, and the wire pressing frame assemblies are sequentially installed into the wire pressing frame assembly slots of the first shell; Three copper bars are provided, and the copper bars are sequentially inserted into the wire pressing frame assemblies through the copper bar slots and fixed in the wire pressing frame assemblies, and good contact is maintained between the copper bars and the wire pressing frame assemblies; A temperature sensor is provided, and the temperature sensor is installed in the containing cavity formed by the inner wall of the transformer, the notch of the copper bar slot, and the copper bar, so that the temperature sensor is in contact with the lower end surface of the copper bar; A circuit board is provided, and the circuit board is installed in the first shell along the circuit board slot of the first shell; A second shell is provided, and the second shell is covered on the first shell from the front side and the bottom; the copper bars are extended from the copper bar holes of the second shell, the end of the circuit board is placed in the circuit board positioning slot, the buckles of the second shell are buckled and connected with the buckle slots of the first shell, and the installation is completed.

7. A protection metering device, characterized in that The protection metering assembly includes a three-phase circuit breaker and an electric energy metering module according to any one of claims 1-5, the copper bar of the electric energy metering module is inserted into the output end of the three-phase circuit breaker and locked and fixed to form the protection metering assembly, and the monitoring host and multiple sets of the protection metering assembly are sequentially arranged, the monitoring host is sequentially connected with the data interfaces of multiple electric energy metering modules through data transmission lines.

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