CN214174478U - Special terminal box of electric energy measurement - Google Patents
Special terminal box of electric energy measurement Download PDFInfo
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- CN214174478U CN214174478U CN202023332564.5U CN202023332564U CN214174478U CN 214174478 U CN214174478 U CN 214174478U CN 202023332564 U CN202023332564 U CN 202023332564U CN 214174478 U CN214174478 U CN 214174478U
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- electric energy
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- 238000005259 measurement Methods 0.000 title claims description 6
- 238000001514 detection method Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
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Abstract
The utility model provides a special terminal box for electric energy metering, which comprises a voltage terminal board and a current terminal board, wherein the voltage terminal board comprises a first voltage upper connecting terminal, a second voltage upper connecting terminal, a first voltage lower connecting terminal and a second voltage lower connecting terminal, the first voltage upper connecting terminal and the first voltage lower connecting terminal are connected through a first voltage connecting piece, and the second voltage upper connecting terminal and the second voltage lower connecting terminal are connected through a second voltage connecting piece; the current wiring board comprises a first current upper connecting terminal, a first normally-on connecting terminal, a second normally-on connecting terminal and a second current upper connecting terminal which are sequentially arranged, wherein the first current upper connecting terminal and the first normally-on connecting terminal are connected through a first current connecting piece, and the second normally-on connecting terminal and the second current upper connecting terminal are connected through a second current connecting piece.
Description
Technical Field
The utility model relates to a terminal box field especially relates to a special terminal box of electric energy measurement.
Background
The special junction box for electric energy metering connects a secondary loop led by a voltage transformer and a current transformer to a wiring terminal of an electric energy meter after the secondary loop is connected in series and in parallel by the junction box, so that the electric energy metering device can meter the electric energy in the secondary loop. The device is beneficial to on-site calibration and replacement of the electric energy metering device, can ensure the accuracy of electric energy metering, and is widely suitable for single-phase illumination and three-phase active and reactive electric energy metering wiring of various voltage levels. In order to not affect the field power production, the electric energy meter is generally replaced with a load, a secondary current loop is in a short circuit, a secondary voltage loop is in an open circuit by adjusting a current connecting piece and a voltage connecting piece of a special junction box for electric energy metering, and the electric quantity loss in the replacement time is caused because the meter is in voltage loss and cannot be metered.
SUMMERY OF THE UTILITY MODEL
Not enough to exist among the prior art, according to the utility model discloses an embodiment provides a special terminal box of electric energy measurement, has solved and can't carry out electric energy measurement's problem when changing the ammeter.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a special junction box for electric energy metering is used for connecting a three-phase three-wire electric energy meter and a secondary circuit of a mutual inductor and comprises a voltage junction board and a current junction board, wherein the voltage junction board comprises a first voltage upper connection terminal, a second voltage upper connection terminal, a first voltage lower connection terminal and a second voltage lower connection terminal; the current wiring board comprises a first current upper connecting terminal, a first normally-on connecting terminal, a second normally-on connecting terminal and a second current upper connecting terminal which are sequentially arranged, the first current upper connecting terminal and the first normally-on connecting terminal are connected through a first current connecting piece, and the second normally-on connecting terminal and the second current upper connecting terminal are connected through a second current connecting piece; the first normally-on connecting terminal is communicated with the second normally-on connecting terminal through a third current connecting piece.
Furthermore, the terminal box is provided with three groups of voltage wiring boards.
Furthermore, the junction box is provided with two groups of current wiring boards.
The utility model has the advantages that: different connecting terminals in the junction box are controlled to be connected through the control connecting piece, so that the two electric energy meters can operate simultaneously, when one electric energy meter needs to be replaced, the other electric energy meter can replace the operation of the other electric energy meter, and the on-load replacement of the electric energy meter is realized.
Drawings
FIG. 1 is a schematic diagram of a junction box of an embodiment of a single electric meter in operation;
fig. 2 is a schematic diagram of a junction box of the embodiment when the double ammeter works.
Fig. 3 is a schematic diagram of a connection circuit of the junction box and the electric energy meter according to the embodiment.
In the above drawings: 1. a voltage terminal plate; 2. a current wiring board; 3. a first voltage upper connection terminal; 4. a second voltage upper connection terminal; 5. a first voltage lower connection terminal; 6. a second voltage lower connection terminal; 7. a first current upper connection terminal; 8. a first normally-on connection terminal; 9. a second normally-on connection terminal; 10. a second current upper connection terminal; 11. a first voltage connection; 12. a second voltage connection; 13. a first current link; 14. a second current connection piece; 15. a third current connection piece; 16. a first electric energy meter; 17. a second electric energy meter.
Detailed Description
The technical solution of the present invention will be further explained with reference to the accompanying drawings and embodiments.
As shown in fig. 1, a junction box dedicated for electric energy metering comprises a voltage terminal board 1 and a current terminal board 2, wherein the voltage terminal board 1 comprises a first voltage upper connection terminal 3, a second voltage upper connection terminal 4, a first voltage lower connection terminal 5 and a second voltage lower connection terminal 6, the first voltage upper connection terminal 3 and the first voltage lower connection terminal 5 are connected through a first voltage connection piece 11, and the second voltage upper connection terminal 4 and the second voltage lower connection terminal 6 are connected through a second voltage connection piece 12; connecting terminal 5 under the first voltage and connecting terminal 6 under the second voltage pass through the circuit intercommunication and are connected with voltage transformer's secondary voltage return circuit, first voltage even piece 11 and second voltage even piece 12 be used for controlling respectively two electric energy meters with secondary voltage return circuit's connection.
As shown in fig. 1, the current connection board 2 includes a first current upper connection terminal 7, a first normally-on connection terminal 8, a second normally-on connection terminal 9 and a second current upper connection terminal 10 which are arranged in this order, the first current upper connection terminal 7 and the first normally-on connection terminal 8 are connected by a first current connection piece 13, and the second normally-on connection terminal 9 and the second current upper connection terminal 10 are connected by a second current connection piece 14; the first normally-on connecting terminal 8 is connected with one end of a secondary current loop of the current transformer, and the second normally-on connecting terminal 9 is connected with the other end of the secondary current loop.
As shown in fig. 1 and 3, when only the first electric energy meter 16 operates, the first voltage upper connection terminal 3 is connected to a voltage detection end of the first electric energy meter 16, the first current upper connection terminal 7 is connected to a current detection input end of the first electric energy meter 16, the second normally-on connection terminal 9 is connected to a current detection output end of the first electric energy meter 16, the first voltage connection piece 11 and the first current connection piece 13 are both closed, when the first electric energy meter 16 needs to be replaced, the second voltage upper connection terminal 4 is connected to a voltage detection end of the second electric energy meter 17, the first normally-on connection terminal 8 is connected to a current detection input end of the second electric energy meter 17, and the second current upper connection terminal 10 is connected to a current detection output end of the second electric energy meter 17. The first electric energy meter 16 and the second electric energy meter 17 are three-phase three-wire electric energy meters.
As shown in fig. 2 and 3, the first voltage connecting piece 11, the first current connecting piece 13, the second voltage connecting piece 12 and the second current connecting piece 14 are closed, so that the two electric energy meters can operate simultaneously, the voltage displayed by each electric energy meter is the actual voltage reading, and the sum of the currents displayed by the first electric energy meter 16 and the second electric energy meter 17 is the actual current reading; the first voltage connecting piece 11 and the first current connecting piece 13 are disconnected, the second electric energy meter 17 can replace the first electric energy meter 16 to normally work, and the load replacement of the first electric energy meter 16 can be realized.
As shown in fig. 1, the first normally-on connection terminal 8 and the second normally-on connection terminal 9 are connected by a third current connection piece 15. The third current connecting piece 15 can short-circuit the secondary current loop by communicating the first normally-on connecting terminal 8 with the second normally-on connecting terminal 9, so as to replace the electric energy meter in an emergency.
As shown in fig. 1, the junction box is provided with three groups of voltage terminal boards 1 for monitoring the voltages on three phase lines.
As shown in fig. 1, the junction box is provided with two sets of current terminal boards 2, which can monitor the current on two phase lines.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (3)
1. The utility model provides a special terminal box of electric energy measurement for connect three-phase three-wire electric energy meter and mutual-inductor secondary circuit, including voltage wiring board and current wiring board, its characterized in that: the voltage wiring board comprises a first voltage upper connecting terminal, a second voltage upper connecting terminal, a first voltage lower connecting terminal and a second voltage lower connecting terminal, wherein the first voltage upper connecting terminal and the first voltage lower connecting terminal are connected through a first voltage connecting piece, and the second voltage upper connecting terminal and the second voltage lower connecting terminal are connected through a second voltage connecting piece; the current wiring board comprises a first current upper connecting terminal, a first normally-on connecting terminal, a second normally-on connecting terminal and a second current upper connecting terminal which are sequentially arranged, the first current upper connecting terminal and the first normally-on connecting terminal are connected through a first current connecting piece, and the second normally-on connecting terminal and the second current upper connecting terminal are connected through a second current connecting piece; the first normally-on connecting terminal is communicated with the second normally-on connecting terminal through a third current connecting piece.
2. The junction box special for electric energy metering of claim 1, wherein: the terminal box is provided with three groups of voltage wiring boards.
3. The junction box dedicated for electric energy metering of claim 1 or 2, wherein: the junction box is provided with two groups of current wiring boards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332564.5U CN214174478U (en) | 2020-12-31 | 2020-12-31 | Special terminal box of electric energy measurement |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023332564.5U CN214174478U (en) | 2020-12-31 | 2020-12-31 | Special terminal box of electric energy measurement |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214174478U true CN214174478U (en) | 2021-09-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023332564.5U Active CN214174478U (en) | 2020-12-31 | 2020-12-31 | Special terminal box of electric energy measurement |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214174478U (en) |
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2020
- 2020-12-31 CN CN202023332564.5U patent/CN214174478U/en active Active
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