Adapter used for testing energy meters

Abstract

An adapter for connecting a three-port meter to a three-phase meter test board is disclosed. The adapter comprises a first interface for connecting to the three-phase meter test board and a second interface for connecting to the three-port meter. Also disclosed is a meter test system comprising a three-phase meter test board and an adapter received by the three-phase meter test board and configured to receive the three-port meter. An associated method of testing a three-port meter using a three-phase meter test board is also disclosed.

Description

[Technical Field]

[0001] Related Applications This application claims priority to U.S. Patent Application Serial No. 63 / 435610, filed December 28, 2022, which is incorporated herein by reference in its entirety.

[0002] Technical Field The present disclosure is in the field of adapters for connecting meters to meter test boards for testing the meters, and more particularly to adapters for connecting a three-port meter to a three-phase meter test board. [Background technology]

[0003] Distributed energy resource (DER) devices may include, for example, solar panels, wind turbines, electric vehicle batteries, generators, etc. There is a general trend toward increased use of DER devices by energy consumers, including residential consumers.

[0004] In resource distribution systems, such as power grids that deliver electrical power, meters may be used to measure and control consumption at customer premises. Meters may include metering components for measuring consumption and monitoring power characteristics, and communication components for communicating with other devices in the network as well as with a central system, such as a head-end system. Meters may also include other modules and components.

[0005] If the DER device is located in a residential premises facility, the electricity generated or stored by the DER device may be metered by a multiport meter and may be used in the premises facility or output to the power grid.

[0006] To accommodate DERs in residential premises installations, a new type of meter has been proposed with multiple ports for connecting DERs to the grid and customers. This new meter type, 43S, has the ability to isolate DERs from the grid and isolate customers in the case of solar power generation, or to isolate electric vehicle charging stations without disconnecting customers, as defined in the ANSI C12.10 specification.

[0007] It is known to test and / or calibrate meters, for example, at the time of manufacture, installation, or even at end of life, by placing the meter on a meter test board configured to simulate typical use of the meter. Summary of the Invention [Problem to be solved by the invention]

[0008] However, typical three-phase meter test equipment may have insufficient features and / or may be inappropriately configured for testing the new meter type 43S. Typical three-phase meter test equipment may be relatively expensive.

[0009] Thus, it is desirable to provide a relatively low-cost and reliable means for testing new meter type 43S. Such a means should be reliable, secure, and not prohibitively expensive and / or resource intensive to implement.

[0010] It is therefore an object of at least one embodiment of at least one aspect of the present disclosure to avoid or at least mitigate at least one of the above-mentioned disadvantages of the prior art. [Means for solving the problem]

[0011] The present disclosure relates to an adapter for connecting a meter to a meter test board for testing the meter, and more particularly to an adapter for connecting a three-port meter to a three-phase meter test board. According to a first aspect of the present disclosure, there is provided an adapter for connecting a three-port meter to a three-phase meter test board. The adapter includes a first interface for connecting to the three-phase meter test board and a second interface for connecting to the three-port meter.

[0012] The adapter includes first and second conductive elements for connecting the first and second a-phase current source terminals of the first interface to the first line port terminal and the first load port terminal of the second interface, respectively.

[0013] The adapter includes third and fourth conductive elements for connecting the first and second c-phase current source terminals of the first interface to the second line port terminal and the second load port terminal of the second interface, respectively.

[0014] The adapter includes a fifth conductive element for connecting a first distributed energy resource (DER) port terminal of the second interface to a second DER port terminal of the second interface.

[0015] The adapter includes sixth and seventh conductor elements for connecting the first and second b-phase current source terminals of the first interface to the first and second line port terminals, respectively, or to the first and second load port terminals, respectively.

[0016] Advantageously, the disclosed adapter(s) allow a test board having only three current elements to simultaneously flow current from the line (grid) through both the load port and the DER port of a three-port meter. Advantageously, by transmitting current through the DER port using what would traditionally be a third current element for three-phase service, the test board can obtain accurate energy measurements. That is, the disclosed adapter(s) effectively enable simultaneous testing of energy flow through all of the ports of a three-port meter at the same time.

[0017] The adapter may include at least one switch, such as at least one relay, for selectively configuring the adapter between a first configuration or a second configuration, where the first configuration connects the first and second b-phase current source terminals of the first interface to the first and second line port terminals, respectively, and the second configuration connects the first and second b-phase current source terminals of the first interface to the first and second load port terminals, respectively.

[0018] The adapter may be configured to connect the a-phase voltage source of the first interface to the second interface by connecting the first a-phase current source terminal to a first terminal of the first potential link, the second terminal of the first potential link being selectively connected to the first line port terminal.

[0019] The adapter may be configured to connect the c-phase voltage source of the first interface to the second interface by connecting the first c-phase current source terminal to a first terminal of a second potential link, the second terminal of the second potential link being selectively connected to the second line port terminal.

[0020] The adapter may comprise a further conductive element configured to connect the neutral terminal of the first interface to the neutral terminal (230g, 330g) of the second interface.

[0021] The first interface may comprise a plurality of blades received by a meter socket on the three-phase meter test board, each blade being connected to one of the first through seventh conductive elements.

[0022] The second interface may comprise a plurality of sockets for receiving blades of the three-phase meter, each socket being connected to one of the first through seventh conductive elements.

[0023] According to a second aspect of the present disclosure, there is provided a meter test system including a three-phase meter test board and an adapter according to the first aspect. The adapter may be received by the three-phase meter test board and configured to receive a three-port meter.

[0024] The three-phase meter test board may include an a-phase current source, a b-phase current source, and a c-phase current source, which are floating and electrically isolated from each other.

[0025] The meter test system may include a three-phase meter.

[0026] The three-phase meter may conform to meter type 43S as defined by American National Standard for the Physical Description of Energy Meters (ANSI) C12.10.

[0027] According to a third aspect of the present disclosure, there is provided a method of testing a three-port meter using a three-phase meter test board, the method comprising connecting the three-port meter to the three-phase meter test board using an adapter as claimed in any preceding claim.

[0028] The method may include configuring the adapter in a first configuration connecting first and second b-phase current source terminals of the first interface to first and second line port terminals, respectively.

[0029] The method may include configuring the adapter in a second configuration connecting first and second b-phase current source terminals of the first interface to the first and second line port terminals, respectively.

[0030] The method may include configuring a-phase, b-phase, and c-phase current sources of a three-phase meter test board to simulate simultaneous flow of energy from the DER port to a line port of the meter and from the line port to a load port of the meter.

[0031] The method may include configuring a-phase, b-phase, and c-phase current sources of a three-phase meter test board to simulate simultaneous flow of energy from the DER port to the load port of the meter and from the line port to the load port of the meter.

[0032] The method may include, for example, the preceding step of configuring a first potential link and / or a second potential link of the adapter to avoid a short circuit through the b-phase current source.

[0033] The foregoing summary is intended to be merely illustrative and non-limiting. The present disclosure includes one or more corresponding aspects, embodiments, or features, whether specifically described (including in the claims) in combination or separately, separately or in various combinations. It should be understood that the features defined above for any aspect of the present disclosure, or the features defined below for any particular embodiment of the present disclosure, may be utilized alone or in combination with any other defined feature in any other aspect or embodiment, or to form further aspects or embodiments of the present disclosure. [Brief explanation of the drawings]

[0034] [Figure 1] Indicates a type 43S meter. [Figure 2] A proposed solution for testing all ports of a Type 43S meter is presented. [Figure 3] 1 illustrates a method for testing a port of a Type 43S meter according to an embodiment of the present disclosure. [Figure 4] 4 illustrates a configuration of an adapter for implementing the method of FIG. 3 according to an embodiment of the present disclosure. [Figure 5] 10 illustrates a further method for testing a port of a Type 43S meter according to an embodiment of the present disclosure. [Figure 6] 6 illustrates a configuration of an adapter for implementing the method of FIG. 5 according to an embodiment of the present disclosure. DETAILED DESCRIPTION OF THE INVENTION

[0035] These and other aspects of the present disclosure will now be described, by way of example only, with reference to the accompanying drawings.

[0036] 1 shows an example of a Type 43S three-port meter 100. The exemplary three-port meter 100 includes a line port 105, also known in the art as a grid port. In use, the line port 105 may be coupled to an electrical power grid.

[0037] The exemplary three-port meter 100 includes a load port 110. In use, the load port 110 may be connected to a load, for example, a load that consumes electrical energy in a premises installation, such as air conditioning or heating.

[0038] The exemplary three-port meter 100 includes a "DER port" 115. In use, the DER port 115 may be connected to a distributed energy resource, such as, for example, a solar panel, a wind turbine, an electric vehicle battery, a generator, or the like.

[0039] The exemplary three-port meter 100 includes a plurality of blades 120a-g. In use, the exemplary three-port meter 100 may be inserted into a meter socket (not shown), and the blades 120a-g may be received in corresponding sockets of the meter socket.

[0040] When the exemplary three-port meter 100 is in use, two blades 120a, 120b are connected to the line port 105, two blades 120c, 120d are connected to the load port 110, two blades 120e, 120f are connected to the DER port 115, and a further blade 120g is connected to the neutral point.

[0041] The exemplary three-port meter 100 includes circuitry 125 that includes various current transformers for measuring / metering each phase of current flow through the ports and potential transformers for measuring / metering each phase of voltage.

[0042] The exemplary three-port meter 100 also includes potential links 130a, 130b, also known as "test links," for disconnecting the voltage source during testing to avoid short circuits through the current source.

[0043] The exemplary three-port meter 100 also includes disconnects designated S1A, S1B, S2A, and S2C. Such disconnects S1A, S1B, S2A, and S2C may be implemented as relays. The disconnects S1A, S1B, S2A, and S2C may be used to isolate loads or sources. For example, disconnects S1A and S2A may be opened to isolate the grid connected to line port 105, or disconnects S2A and S2B may be opened to isolate a DER connected to DER port 115.

[0044] A method and apparatus for testing such a three-port meter 100 will now be described with reference to FIGS.

[0045] Using conventional methods, to test such three ports, e.g., the line load and the DER port, four current sources may be required. This is illustrated in Figure 2, which shows a hypothetical meter test scenario. In this example, an exemplary three-port meter 100 is tested using: an a-phase current source 140 connected between the blade 120a of the line port 105 and the blade 120e of the DER port 115; a d-phase current source 150 connected between blade 120b of line port 105 and blade 120f of DER port 115, a b-phase current source 160 connected between blade 120b of line port 105 and blade 120c of load port 110; and A c-phase current source 170 is connected between the blade 120 b of the line port 105 and the blade 120 d of the load port 110 .

[0046] That is, a test board with a total of four current sources is required to simulate the simultaneous flow of energy from the DER port to the meter's line port 105 and from the line port 105 to the meter's load port 110, and to simulate the simultaneous flow of energy from the DER port to the meter's load port 110 and from the line port 105 to the meter's load port 110. Such a test board implementation can be prohibitively expensive to implement.

[0047] FIG. 3 illustrates a method for testing an exemplary three-port meter 100, where, to test a three-port meter, e.g., a Type 43S meter, an adapter can be used to route current in a particular manner that emulates typical use of a three-port meter.

[0048] Such a method has the advantage of allowing three-port meters to be tested with existing, widely used three-phase test boards and three-phase reference standards, without the need for new four-phase reference standards and test boards.

[0049] In this method, adapter 200 is implemented to use the existing B-phase current element and direct it across blades 120a and 120c of line port 105. The existing A-phase current element is provided across blade 120a of load port 110 and blade 120c of load port 110. Blades 120e and 120f of DER port 115 are shorted together. When the grid port is closed, the DER becomes a 240V source or load, and the currents through it are equal. Therefore, a fourth independent current phase is not required, as shown in FIG. 2.

[0050] Figure 4 illustrates a configuration of an adapter 200 for implementing the method of Figure 3, according to an embodiment of the present disclosure. Figure 4 illustrates an adapter 200 for connecting a three-port meter 100 to a three-phase meter test board.

[0051] The adapter 200 has a first interface for connecting to, for example, a three-phase meter test board, shown as "Test Equipment Socket" in Figure 4. The adapter 200 has a second interface for connecting to a three-port meter, shown as "Connection to Meter" in Figure 4.

[0052] The adapter 200 comprises a first conductive element 205a for connecting the first a-phase current source terminal 230a of the first interface to the first line port terminal 220a of the second interface.

[0053] The adapter 200 includes a second conductive element 205b for connecting the second a-phase current source terminal 230b of the first interface to the first load port terminal 220c of the second interface.

[0054] The adapter 200 includes a third conductive element 205c for connecting the first c-phase current source terminal 230c of the first interface to the second line port terminal 220b of the second interface.

[0055] The adapter 200 includes a fourth conductive element 205d for connecting the second c-phase current source terminal 230d of the first interface to the second load port terminal 220d of the second interface.

[0056] The adapter 200 includes a fifth conductive element 205e for connecting the first distributed energy resource (DER) port terminal 220e of the second interface to the second DER port terminal 220f of the second interface.

[0057] The adapter 200 includes a sixth conductive element 205f for connecting the first b-phase current source terminal 230e of the first interface to the first terminal 220a of the line port.

[0058] The adapter 200 includes a seventh conductive element 205g for connecting the second b-phase current source terminal 230f of the first interface to the second terminal 220c of the line port.

[0059] In some embodiments, adapter 200 also includes an eighth conductive element 205h configured to connect the a-phase voltage source of the first interface to the second interface by connecting first a-phase current source terminal 230a to a first terminal of first potential link 240a, the second terminal of which is selectively connected to first line port terminal 220a.

[0060] In some embodiments, the eighth conductive element 205h may be at least partially coupled to or integral with the first conductive element 205a.

[0061] In some embodiments, adapter 200 also includes a ninth conductive element 205i configured to connect the first c-phase current source terminal 230c to a first terminal of second potential link 240b, thereby connecting the c-phase voltage source of the first interface to the second interface. The second terminal of second potential link 240b is selectively connected to second line port terminal 220c.

[0062] In some embodiments, the ninth conductive element 205i may be at least partially coupled to or integral with the third conductive element 205c.

[0063] The adapter 200 also includes a tenth conductive element 205j configured to connect the neutral terminal 230g of the first interface to the neutral terminal 220g of the second interface.

[0064] FIG. 5 illustrates a method for testing an exemplary three-port meter 100, where, to test a three-port meter, e.g., a Type 43S meter, an adapter can be used to route current in a particular manner that emulates typical use of a three-port meter.

[0065] Such a method has the advantage of allowing three-port meters to be tested with existing, widely used three-phase test boards and three-phase reference standards, without the need for new four-phase reference standards and test boards.

[0066] In this method, adapter 300 is implemented to simulate a scenario in which a load port is consuming energy from both a DER and a line port, e.g., the grid. Figure 5 illustrates the current flow for this instance. In contrast to the example of Figure 3, in this example, the existing B-phase current elements are used and directed to load port blade 120c and load port blade 120d. Therefore, a fourth independent current phase is not required.

[0067] Figure 6 illustrates a configuration of an adapter 300 for implementing the method of Figure 5, according to an embodiment of the present disclosure. Figure 6 illustrates an adapter 300 for connecting a three-port meter 100 to a three-phase meter test board.

[0068] The adapter 300 has a first interface for connecting to, for example, a three-phase meter test board, shown as "Test Equipment Socket" in Figure 4. The adapter 300 has a second interface for connecting to a three-port meter, shown as "Connection to Meter" in Figure 4.

[0069] The adapter 300 comprises a first conductive element 305a for connecting the first a-phase current source terminal 330a of the first interface to the first line port terminal 320a of the second interface.

[0070] The adapter 300 includes a second conductive element 305b for connecting the second a-phase current source terminal 330b of the first interface to the first load port terminal 320c of the second interface.

[0071] The adapter 300 includes a third conductive element 305c for connecting the first c-phase current source terminal 330c of the first interface to the second line port terminal of the second interface.

[0072] The adapter 300 includes a fourth conductive element 305d for connecting the second c-phase current source terminal 330d of the first interface to the second load port terminal 320d of the second interface.

[0073] The adapter 300 includes a fifth conductive element 305e for connecting a first distributed energy resource (DER) port terminal 320e of the second interface to a second DER port terminal 320f of the second interface.

[0074] The adapter 300 includes a sixth conductive element 305f for connecting the first b-phase current source terminal 330e of the first interface to the first terminal 320c of the load port.

[0075] The adapter 300 includes a seventh conductive element 305g for connecting the second b-phase current source terminal 330f of the first interface to the second terminal 320d of the load port.

[0076] In some embodiments, adapter 300 also includes an eighth conductive element 305h configured to connect first a-phase current source terminal 330a to a first terminal of first potential link 340a, thereby connecting the a-phase voltage source of the first interface to the second interface. A second terminal of first potential link 340a is selectively connected to first line port terminal 320a.

[0077] In some embodiments, the eighth conductive element 305h may be at least partially coupled to or integral with the first conductive element 305a.

[0078] In some embodiments, adapter 300 also includes a ninth conductive element 305i configured to connect the first c-phase current source terminal 330c to a first terminal of second potential link 340b, thereby connecting the c-phase voltage source of the first interface to the second interface. A second terminal of second potential link 340b is selectively connected to second line port terminal 320c.

[0079] In some embodiments, the ninth conductive element 305i may be at least partially coupled to or integral with the third conductive element 305c.

[0080] The adapter 300 also includes a tenth conductive element 305j configured to connect the neutral terminal 330g of the first interface to the neutral terminal 320g of the second interface.

[0081] Although adapter 200 of FIG. 4 and adapter 300 of FIG. 6 are shown as separate adapters, it will be appreciated that in other embodiments of the present disclosure, a single adapter may be configurable between the configurations of adapter 200 of FIG. 4 and adapter 300 of FIG. 6.

[0082] That is, in some embodiments, the adapter may be implemented with at least one switch, relay, or the like to selectively configure the adapter between a first configuration or a second configuration. The first configuration connects the first and second b-phase current source terminals 230e, 230f of the first interface to the first and second line port terminals 220a, 220c, respectively. The second configuration connects the first and second b-phase current source terminals 230e, 2320f of the first interface to the first and second line port terminals 220c, 220d, respectively.

[0083] Advantageously, adapters 200, 300, or the combined adapters described above, allow current to flow simultaneously from the line (grid) through both the load port and the DER port of a three-port meter, with the test board having only three current elements.

[0084] By transmitting current through the DER port using what would traditionally be a third current element for three-phase service, the test board can obtain accurate energy measurements.

[0085] That is, the disclosed adapter(s) effectively allow for simultaneous testing of the flow of energy through all of the ports of a three-port meter at the same time.

[0086] While the present disclosure has been described with reference to specific embodiments as described above, it should be understood that these embodiments are exemplary only and that the claims are not limited to these embodiments. Those skilled in the art will be able to make modifications and variations in light of this disclosure, which are intended to be included within the scope of the appended claims. Each feature disclosed or illustrated herein may be incorporated into any embodiment, either alone or in any suitable combination with any other feature disclosed or illustrated herein. [Explanation of symbols]

[0087] 100 3-port meter 105 Line Port 110 Load Port 115 DER Port 120a~g blade 125 circuits 130a,b Potential Links 140 a phase current source 150 d phase current source 160 b phase current source 170 c phase current source 200 adapter 205a First conductive element 205b second conductive element 205c Third conductive element 205d Fourth Conductive Element 205e Fifth Conductive Element 205f Sixth Conductive Element 205g Seventh Conductive Element 205h Eighth Conductive Element 205i Ninth Conductive Element 205j 10th Conductive Element 220a First line port terminal 220b Second line port terminal 220c First Load Port Terminal 220d Second Load Port Terminal 220e First DER port terminal 220f Second DER port terminal 230a First a-phase current source terminal 230b Second a-phase current source terminal 230c First c-phase current source terminal 230d Second C-phase current source terminal 230e First b-phase current source terminal 230f Second b-phase current source terminal 230g neutral point terminal 240a First potential link 240b Secondary Potential Link 300 adapter 305a First conductive element 305b second conductive element 305c Third conductive element 305d Fourth Conductive Element 305e Fifth Conductive Element 305f Sixth Conductive Element 305g Seventh Conductor Element 305h Eighth Conductor Element 305i Ninth Conductive Element 305j 10th Conductive Element 320a First line port terminal 320b Second line port terminal 320c First Load Port Terminal 320d Second Load Port Terminal 320e First DER port terminal 320g neutral point terminal 3220f Second DER port terminal 330a First a-phase current source terminal 330b Second a-phase current source terminal 330c First c-phase current source terminal 330d Second C-phase current source terminal 330e First b-phase current source terminal 330f Second b-phase current source terminal 330g neutral point terminal 340a First potential link 340b Secondary Potential Link

Claims

1. 1. An adapter (200, 300) for connecting a three-port meter to a three-phase meter test board, said adapter comprising: a first interface for connecting to the three-phase meter test board; a second interface for connecting to the three-port meter; first and second conductive elements (205a, 205b, 305a, 305b) for connecting first and second a-phase current source terminals (230a, 230b, 330a, 330b) of the first interface to first line port terminals (220a, 320a) and first load port terminals (220c, 320c) of the second interface, respectively; third and fourth conductive elements (205c, 205d, 305c, 305d) for connecting first and second c-phase current source terminals (230c, 230d, 330c, 330d) of the first interface to second line port terminals (220b, 3200b) and second load port terminals (220d, 320d) of the second interface, respectively; a fifth conductive element (205e, 305e) for connecting a first distributed energy resource (DER) port terminal (220e, 320e) of the second interface to a second DER port terminal (220f, 320f) of the second interface; sixth and seventh conductive elements (205f, 205g, 305f, 305g) for connecting first and second b-phase current source terminals (230e, 230f, 330e, 330f) of the first interface to the first and second line port terminals (220a, 220b, 320a, 320b), respectively, or to the first and second load port terminals (220c, 220d, 320c, 320d), respectively; Adapter (200, 300).

2. the adapter comprising at least one switch for selectively configuring the adapter between a first configuration or a second configuration; The first configuration connects the first and second b-phase current source terminals (230e, 230f, 330e, 330f) of the first interface to the first and second line port terminals (220a, 220b, 320a, 320b), respectively; the second configuration connects the first and second b-phase current source terminals (230e, 230f, 330e, 330f) of the first interface to the first and second load port terminals (220c, 220d, 320c, 320d), respectively; The adapter (200, 300) of claim 1.

3. the adapter is configured to connect the first a-phase current source terminal (230a, 320a) to a first terminal of a first potential link (240a, 340a) to connect an a-phase voltage source of the first interface to the second interface; a second terminal of the first potential link selectively connected to the first line port terminal (220a, 320a); The adapter (200, 300) according to claim 1 or 2.

4. configured to connect the first c-phase current source terminal (230c, 330c) to a first terminal of a second potential link (240b, 340b) to connect a c-phase voltage source of the first interface to the second interface; a second terminal of the second potential link selectively connected to the second line port terminal (220b, 320b); An adapter (200, 300) according to any one of claims 1 to 3.

5. a further conductive element (205j, 305j) configured to connect the neutral terminal of the first interface to the neutral terminal of the second interface, An adapter (200, 300) according to any one of claims 1 to 4.

6. the first interface includes a plurality of blades received by a meter socket on the three-phase meter test board, each blade being connected to one of the first to seventh conductive elements; An adapter (200, 300) according to any one of claims 1 to 5.

7. the second interface comprises a plurality of sockets for receiving blades of the three-phase meter, each socket being connected to one of the first through seventh conductive elements; An adapter (200, 300) according to any one of claims 1 to 6.

8. A three-phase meter test board and an adapter (200, 300) according to any one of claims 1 to 7, the adapter is configured to be received by the three-phase meter test board and to receive the three-port meter; Meter test system.

9. The three-phase meter test board includes an a-phase current source, a b-phase current source, and a c-phase current source; The current sources are floating and electrically isolated from each other.

9. The meter test system of claim 8.

10. The meter test system includes a three-phase meter (100), Optionally, the three-phase meter conforms to meter type 43S as defined by American National Standard for Physical Description of Electricity Meters (ANSI) C12.

10.

10. The meter test system according to claim 8 or 9.

11. 1. A method for testing a three-port meter using a three-phase meter test board, comprising: connecting the three-port meter to the three-phase meter test board using an adapter (200, 300) according to any one of claims 1 to 7. method.

12. The method includes configuring the adapter in a first configuration or a second configuration; The first configuration connects the first and second b-phase current source terminals of the first interface to the first and second line port terminals, respectively; the second configuration connects the first and second b-phase current source terminals of the first interface to the first and second line port terminals, respectively; The method of claim 10.

13. In the first configuration, the method includes configuring a-phase, b-phase, and c-phase current sources of the three-phase meter test board to simulate simultaneous flow of energy from the DER port to a line port of the meter and from the line port to a load port of the meter.

12. The method according to claim 10 or 11.

14. When in the second configuration, the method includes configuring a-phase, b-phase, and c-phase current sources of the three-phase meter test board to simulate simultaneous flow of energy from the DER port to a load port of the meter and from the line port to a load port of the meter.

12. The method according to claim 10 or 11.

15. the preceding step of configuring a first potential link and / or a second potential link of the adapter to avoid a short circuit through the b-phase current source; 15. The method according to any one of claims 13 and 14.

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