CN210954127U - Combined junction box for secondary circuit of electric energy metering device - Google Patents
Combined junction box for secondary circuit of electric energy metering device Download PDFInfo
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- CN210954127U CN210954127U CN201920756404.1U CN201920756404U CN210954127U CN 210954127 U CN210954127 U CN 210954127U CN 201920756404 U CN201920756404 U CN 201920756404U CN 210954127 U CN210954127 U CN 210954127U
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Abstract
The utility model provides a combined junction box for a secondary circuit of an electric energy metering device, which comprises an electric energy meter junction box and a negative control terminal junction box, wherein the electric energy meter junction box is provided with a first voltage connection terminal group, a first current connection terminal group and a first RS485 connection terminal, the first voltage connection terminal group and the first current connection terminal group are respectively inserted into the first voltage connection terminal group and the first current connection terminal group and fixed by fixing screws, and the first RS485 connection terminal is connected with the first RS485 connection terminal; the negative control terminal junction box is provided with a second voltage connection terminal group, a second current connection terminal group and a second RS485 connection terminal, the second voltage connection terminal group and the second current connection terminal group are respectively inserted into the second voltage connection terminal group and the second current connection terminal group and fixed by fixing screws, and the second RS485 connection terminal is connected with the second RS485 connection terminal. The utility model discloses the letter has lacked the wiring volume, has improved work accuracy and efficiency.
Description
Technical Field
The utility model relates to a terminal box especially relates to a joint terminal box that is used for electric energy metering device secondary circuit.
Background
At present, when the automation transformation of a power grid and the installation of secondary metering equipment are carried out, voltage/current signals need to be acquired from a voltage/current transformer, and the commonly used secondary metering equipment comprises a multifunctional electric energy meter, a distribution transformer acquisition terminal, a negative control acquisition terminal and the like. At each time, on the installation site of the metering cabinet, firstly fixing the acquisition terminal, the electric energy meter and the combined wiring bar to corresponding positions in the metering cabinet, then cutting thirty wires with different lengths and thicknesses according to the factors such as the distance between the acquisition terminal, the electric energy meter and the wiring specification of the metering cabinet, connecting the thirty wires according to corresponding electrical rules, and finding out that the working process has the following defects through long-term working practice:
1. when a worker goes to an installation site, a plurality of cables with different specifications need to be prepared in advance, the length of the cable cannot be determined, if the cable is intercepted in advance, waste is caused, and if the cable is carried in a whole roll, the labor intensity of the worker is increased.
2. The staff carries out the on-the-spot wiring in narrow and small measurement cabinet, and the operation is loaded down with trivial details.
3. Due to the fact that the number of the wires is large, connection relations are complex, and workers are prone to making mistakes when wiring is conducted on site.
4. The staff is at the field work at every turn, and wherein cut out the line, shell the line head, the wiring then needs to spend a large amount of time, and work efficiency is lower.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an efficient joint terminal box that is used for electric energy metering device secondary circuit of wiring.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
a combined junction box for a secondary circuit of an electric energy metering device is installed in a metering cabinet, an electric energy meter and a negative control terminal are installed in the metering cabinet, the electric energy meter is provided with a first terminal seat and a first RS485 terminal block, the first terminal seat is provided with a first voltage connection wire hole group and a first current connection wire hole group, the negative control terminal is provided with a second terminal seat and a second RS485 terminal block, the second terminal seat is provided with a second voltage connection wire hole group and a second current connection wire hole group, the combined junction box comprises an electric energy meter junction box and a negative control terminal junction box, the electric energy meter junction box and the negative control terminal junction box are connected through a first cable group, the electric energy meter junction box is provided with a first voltage connection wire terminal group, a first current connection terminal group and a first RS485 connection wire hole group, the first voltage connection wire terminal group and the first current connection terminal group are respectively and correspondingly inserted into the first voltage connection wire hole group and the first current connection wire, the RS485 wiring terminal I is connected with the RS485 wiring terminal I; the negative control terminal junction box is provided with a second voltage connection terminal group, a second current connection terminal group and a second RS485 connection terminal, the second voltage connection terminal group and the second current connection terminal group are correspondingly inserted into the second voltage connection terminal group and the second current connection terminal group respectively and are fixed by adopting fixing screws, and the second RS485 connection terminal is connected with the second RS485 connection terminal.
Furthermore, the electric energy meter junction box and the negative control terminal junction box both comprise box bodies and box covers, and the box covers are transparent box covers.
Furthermore, the negative control terminal junction box comprises a box body, a box cover and a circuit board, the circuit board of the negative control terminal junction box is fixedly arranged on the box body of the negative control terminal junction box, a door node output terminal and a cover opening contact I are arranged on the circuit board of the negative control terminal junction box, the door node output terminal is electrically connected with the cover opening contact I, and a cover opening contact II corresponding to the cover opening contact I is arranged on the box cover.
Furthermore, a voltage open-circuit switch and a current short-circuit switch are arranged on the negative control terminal junction box.
Furthermore, a three-phase clamp-on ammeter current sampling port is further arranged on the negative control terminal junction box.
After the technical scheme is adopted, the utility model has the advantages of as follows:
1. during wiring installation, only the wiring terminals on the electric energy meter and the electric energy meter wiring box, the negative control terminal and the wiring terminals on the negative control terminal wiring box are correspondingly connected, and the middle wiring part between the electric energy meter and the negative control terminal is completed by the combined wiring box, so that wiring correctness is ensured, attractiveness is improved, wiring amount is reduced, and working accuracy and efficiency are improved.
2. The wiring condition in the junction box can be clearly observed through the transparent box cover.
3. If the box cover is opened in the using process, the first uncovering contact and the second uncovering contact are disconnected, an uncovering signal can be transmitted to the master station management system through the door node output terminal, and the uncovering detection effect is achieved.
4. After the box body and the box cover are installed, the cable bayonet clamps the cable in the cable bayonet, and the cable is fixed stably and is not easy to loosen.
5. The raised lines in the cable clamping openings play a role in axial fixation of the cable, and the cable is prevented from sliding.
6. And a voltage open-circuit switch and a current short-circuit switch are arranged on the negative control terminal junction box, and the negative control acquisition terminal or the electric energy meter can be replaced or maintained under the condition of no power failure by disconnecting the voltage open-circuit switch and the current short-circuit switch.
7. And a data acquisition module is arranged on the combined junction box and used for acquiring the reading of the ammeter, and the data acquisition module is communicated with the meter reading master station through RS 485.
8. The load control terminal junction box is provided with a three-phase clamp-on ammeter current sampling port, and the clamp-on ammeter positions of the A phase, the B phase and the C phase are configured, so that the field calibration of the electric energy meter is facilitated.
9. The junction box is connected with the mutual inductor for wiring, and the cable group II is connected with the corresponding terminal of the mutual inductor end, so that the wiring is ensured to be correct.
Drawings
The present invention will be further explained with reference to the accompanying drawings:
fig. 1 is a schematic structural diagram of a joint junction box for a secondary circuit of an electric energy metering device provided by the present invention.
FIG. 2 is a wiring circuit diagram of the negative control terminal junction box and the transformer.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
A combined junction box for a secondary circuit of an electric energy metering device is installed in a metering cabinet.
Install electric energy meter and burden accuse terminal in the measurement cabinet, the electric energy meter has terminal seat one and RS485 binding post one, terminal seat one is equipped with electric pressure wire connection punch combination one and electric current wire connection punch combination one, burden accuse terminal has terminal seat two and RS485 binding post two, terminal seat two is equipped with electric pressure wire connection punch combination two and electric current wire connection punch combination two.
As shown in fig. 1 and 2, the combined junction box comprises a power meter junction box 1 and a negative control terminal junction box 2, the power meter junction box 1 and the negative control terminal junction box 2 are connected through a first cable group 3, the power meter junction box is provided with a first terminal group 11 and a first RS485 terminal module 12, wherein the first terminal group 11 comprises a first voltage connection terminal group (U1)a、U1b、U1c、U1N) And current wiring terminal group 1
And the RS485 wiring module I12 is connected with the RS485 wiring I. The negative control terminal junction box 2 is provided with a second wiring terminal group 21 and a second RS485 wiring module 22, wherein the second wiring terminal group 21 comprises a second electric-voltage wiring terminal group (U2)a、U2b、U2c、U2N) Current connection terminal group two
And the second RS485 wiring module 22 is connected with the second RS485 wiring module.
The first voltage connection terminal group and the first current connection terminal group are respectively inserted into the first voltage connection terminal group and the first current connection terminal group and are fixed by fixing screws, and the RS485 first connection terminal is connected with the RS485 first connection terminal; the second voltage connection terminal group and the second current connection terminal group are respectively inserted into the second voltage connection terminal group and the second current connection terminal group and fixed by fixing screws, and the second RS485 connection terminal is connected with the second RS485 connection terminal.
The voltage/current wiring terminal of the wiring device of the electric energy meter is configured to use: after the fixing screws of the voltage/current terminals of the electric energy meter terminal block are loosened, the protective sleeves of the voltage/current terminals of the wiring device of the electric energy meter are taken off, the voltage/current terminals of the wiring module of the wiring device of the electric energy meter are aligned to the corresponding wiring holes of the electric energy meter terminal block and pushed in, then the wiring module of the electric energy meter is fixed in the metering cabinet, and the fixing screws of the voltage/current terminals of the electric energy meter terminal block are screwed down, so that the wiring from the electric energy meter to the wiring box is completed.
The terminal wiring device voltage/current wiring terminal is configured: after the voltage/current terminal fixing screws of the terminal block are loosened, the voltage/current terminal protective sleeve of the terminal wiring device is taken off, the voltage/current terminal is aligned to the corresponding wiring hole of the negative control terminal block and pushed in, then the negative control wiring device is fixed in the metering cabinet, and the voltage/current terminal fixing screws of the terminal block are screwed down, so that wiring from the terminal to the wiring box is completed.
The electric energy meter, the joint junction box and the terminal are connected in a wiring module. The combined junction box module completes the middle wiring part among the electric energy meter, the combined junction box and the terminal, ensures the wiring correctness, increases the attractiveness, reduces the wiring amount and improves the working accuracy and efficiency.
The combined junction box connects the RS485 wiring of the wiring module of the electric energy meter of the wiring device with the RS485 wiring terminal of the electric energy meter, and connects the RS485 wiring of the load control wiring device with the RS485 wiring terminal of the load control terminal, so that the correct RS485 wiring between the electric energy meter and the terminal and the acquisition of the real-time data of the site are ensured.
And the transformer terminal of the negative control terminal junction box is connected with a second cable group 4, and the second cable group is connected with a corresponding terminal of the transformer terminal. Specifically, the connection from the junction box of the junction box to the transformer is realized by connecting an output line of the transformer terminal of the junction box to a corresponding terminal of the transformer end by using a 12-core cable (12 cores in total of A, B, C three-phase current, a voltage line (9 cores) and a pair of door contact lines (2 cores) are configured according to technical management regulations of DL/T448-2000 electric energy metering devices), so that the correct connection is ensured.
In order to directly observe the internal wiring, the electric energy meter junction box and the negative control terminal junction box both comprise a box body and a box cover, and the box cover is a transparent box cover. Thus, the internal wiring condition is clear at a glance.
The utility model discloses a joint terminal box has anti-electricity-theft function. The negative control terminal junction box comprises a box body, a box cover and a circuit board, wherein the circuit board of the negative control terminal junction box is fixedly arranged on the box body of the negative control terminal junction box, a door node output terminal and a cover opening contact I are arranged on the circuit board of the negative control terminal junction box, the door node output terminal is electrically connected with the cover opening contact I, and a cover opening contact II corresponding to the cover opening contact I is arranged on the box cover. If the box cover is opened in the using process, the first uncovering contact and the second uncovering contact are disconnected, corresponding information is transmitted to the main station management system through the terminal door node port 23, and the uncovering detection effect is achieved.
In order to fix the cable firmly and not to loosen easily. The electric energy meter junction box and the negative control terminal junction box both comprise box bodies and box covers, cable bayonets are respectively arranged on the electric energy meter junction box and the negative control terminal junction box, the cable bayonets are formed by splicing the box bodies and the box covers, and the cable bayonets protrude out of the outer surfaces of the electric energy meter junction box and the negative control terminal junction box. The inner surface of the cable bayonet is provided with a convex strip used for clamping a cable, and the length direction of the convex strip is perpendicular to the length direction of the cable. After the box body and the box cover are installed, the cable bayonet clamps the cable in the cable bayonet, and the convex strips play a role in axial fixing of the cable to prevent the cable from sliding.
As an implementation mode, the utility model discloses have the function of removable burden accuse terminal and electric energy meter of need not cutting off the power supply. And the negative control terminal junction box is provided with a voltage open-circuit switch and a current short-circuit switch. The negative control acquisition terminal or the electric energy meter can be replaced or maintained under the condition of no power failure by disconnecting the voltage open-circuit switch and the current short-circuit switch.
In addition, the negative control terminal junction box is also provided with a three-phase clamp-on ammeter current sampling port 24. A phase, a phase B phase and a phase C clamp meter card position are configured, and field calibration of the electric energy meter is convenient to carry out.
In addition to the preferred embodiments described above, other embodiments of the present invention are also possible, and those skilled in the art can make various changes and modifications according to the present invention without departing from the spirit of the present invention, which should fall within the scope of the present invention defined by the appended claims.
Claims (5)
1. A combined junction box for a secondary circuit of an electric energy metering device is installed in a metering cabinet, an electric energy meter and a negative control terminal are installed in the metering cabinet, the electric energy meter is provided with a first terminal seat and a first RS485 terminal block, the first terminal seat is provided with a first electric pressure connection wire hole group and a first electric current connection wire hole group, the negative control terminal is provided with a second terminal seat and a second RS485 terminal block, the second terminal seat is provided with a second electric pressure connection wire hole group and a second electric current connection wire hole group, the combined junction box is characterized by comprising an electric energy meter junction box and a negative control terminal junction box, the electric energy meter junction box and the negative control terminal junction box are connected through a first cable group, the electric energy meter junction box is provided with a first electric pressure connection wire terminal group, a first electric current connection terminal group and a first RS connection wire hole group, the first electric pressure connection wire terminal group and the first electric current connection terminal group are correspondingly inserted into the first electric pressure connection wire hole group and, the RS485 wiring terminal I is connected with the RS485 wiring terminal I; the negative control terminal junction box is provided with a second voltage connection terminal group, a second current connection terminal group and a second RS485 connection terminal, the second voltage connection terminal group and the second current connection terminal group are correspondingly inserted into the second voltage connection terminal group and the second current connection terminal group respectively and are fixed by adopting fixing screws, and the second RS485 connection terminal is connected with the second RS485 connection terminal.
2. The junction box for the secondary circuit of an electric energy metering device of claim 1, wherein the electric energy meter junction box and the negative control terminal junction box each comprise a box body and a box cover, and the box cover is a transparent box cover.
3. The junction box for the secondary circuit of the electric energy metering device as claimed in claim 1, wherein the negative control terminal junction box comprises a box body, a box cover and a circuit board, the circuit board of the negative control terminal junction box is fixedly arranged on the box body of the negative control terminal junction box, a door node output terminal and a cover opening contact I are arranged on the circuit board of the negative control terminal junction box, the door node output terminal is electrically connected with the cover opening contact I, and a cover opening contact II corresponding to the cover opening contact I is arranged on the box cover.
4. The junction box for a secondary circuit of an electric energy metering device as recited in claim 1, wherein the negative control terminal box is provided with a voltage open switch and a current short switch.
5. The junction box for the secondary circuit of an electric energy metering device as claimed in claim 1, wherein the load control terminal box is further provided with a three-phase current sampling port of a current meter in a clip-on type.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756404.1U CN210954127U (en) | 2019-05-24 | 2019-05-24 | Combined junction box for secondary circuit of electric energy metering device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920756404.1U CN210954127U (en) | 2019-05-24 | 2019-05-24 | Combined junction box for secondary circuit of electric energy metering device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210954127U true CN210954127U (en) | 2020-07-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920756404.1U Active CN210954127U (en) | 2019-05-24 | 2019-05-24 | Combined junction box for secondary circuit of electric energy metering device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210954127U (en) |
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2019
- 2019-05-24 CN CN201920756404.1U patent/CN210954127U/en active Active
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