CN213843308U - Novel three-phase four-wire combined junction box - Google Patents
Novel three-phase four-wire combined junction box Download PDFInfo
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- CN213843308U CN213843308U CN202022441723.9U CN202022441723U CN213843308U CN 213843308 U CN213843308 U CN 213843308U CN 202022441723 U CN202022441723 U CN 202022441723U CN 213843308 U CN213843308 U CN 213843308U
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Abstract
The application discloses novel terminal box is united to three-phase four-wire, include: the testing device comprises a box body, a box cover, a voltage inlet and outlet wiring hole, a current inlet and outlet wiring hole, a voltage connecting sheet, a current connecting sheet, a voltage connecting plate, a current connecting plate, a testing voltage hole column and a testing current hole column, wherein threaded toothed grooves are formed inside and outside the testing voltage hole column and used for being connected with a voltage loop of an electric energy meter or a checking instrument in parallel, an L-shaped opening is formed in the top of the testing current hole column and used for being connected with the current loop of the electric energy meter or the checking instrument in series or in parallel, the voltage connecting plate and the current connecting plate are alternately distributed inside the box body, the voltage connecting plate is provided with four groups and respectively corresponds to A, B, C, N phase voltages of the junction box, and the current connecting plate is provided with three groups and respectively corresponds to A, B, C phase currents of the junction box. The problem that the current loop of the existing combined junction box can only be connected with an electric energy meter or a calibration instrument in series and cannot be connected in parallel is solved, and the requirement of zero loss of electric quantity of a charged meter-changing is met.
Description
Technical Field
The application relates to the technical field of junction boxes, in particular to a novel three-phase four-wire combined junction box.
Background
The combined junction box is also called an electric energy metering combined junction box and is used as an important component of a metering secondary circuit, the combined junction box is widely applied in the power industry, and the combined junction box has the function of connecting secondary wires led out by a mutual inductor in series and in parallel with voltage and current terminals of a box end and then connecting the secondary wires to voltage and current terminals of an electric energy meter to complete testing or checking of various projects. In the practical process, the on-off states of the voltage loop, the current loop, the upper loop, the lower loop, the left loop and the right loop are changed by changing the positions of the voltage connecting sheet and the current connecting sheet on the junction box, great convenience is brought to field verification, live replacement, electricity utilization inspection and the like of the metering device, and the field working efficiency and the operation safety are improved. However, the current loop of the existing combined junction box can only be connected with an electric energy meter or a calibration instrument in series, and cannot be connected in parallel.
SUMMERY OF THE UTILITY MODEL
In order to solve the problem that the current loop of the existing combined junction box can only be connected with an electric energy meter or a calibration instrument in series and can not realize parallel connection, the application discloses a novel three-phase four-wire combined junction box through each of the following embodiments.
The application discloses novel terminal box is united to three-phase four-wire, include: the device comprises a box body, a box cover, a voltage inlet and outlet wiring hole, a current inlet and outlet wiring hole, a voltage connecting sheet, a current connecting sheet, a test voltage hole column and a test current hole column;
the test voltage hole column is internally and externally provided with threaded toothed grooves and is used for being connected into a voltage loop of an electric energy meter or a calibration instrument in parallel, the top of the test current hole column is provided with an L-shaped opening, and the test current hole column is used for being connected into a current loop of the electric energy meter or the calibration instrument in series or in parallel;
the voltage connecting plates and the current connecting plates are alternately arranged in the box body, four groups of A, B, C, N phases of the voltage connecting plates are respectively corresponding to four-phase voltages of the three-phase four-wire combined junction box, the N phase is a neutral wire, three groups of A, B, C phases of the current connecting plates are respectively corresponding to three-phase currents of the three-phase four-wire combined junction box;
the test voltage hole column and the voltage connecting sheet are arranged on the front face of the voltage connecting plate, and the test current hole column and the current connecting sheet are arranged on the front face of the current connecting plate;
the voltage inlet and outlet wiring hole and the current inlet and outlet wiring hole are positioned on the upper side and the lower side of the box body.
The voltage connecting plate adopts a wiring mode that one wire inlet hole is provided with a plurality of wire outlet holes, and each group of voltage connecting plates is provided with one test voltage hole column.
The current connecting plate is composed of two to four mutually independent current channels, each independent current channel adopts a wiring mode of one wire inlet hole and one wire outlet hole, and three test current hole columns are arranged on each group of current connecting plate.
Optionally, the left and right sides of box body all is equipped with a mounting hole, every respectively be equipped with an adjustable installation mechanism on the mounting hole, adjustable installation mechanism is the hollow sheetmetal of a long rectangle, the box body bottom is equipped with the hemisphere stabilizer blade.
Optionally, the voltage connection piece and one end of the current connection piece are provided with insulation caps, the insulation caps are used for carrying out color identification according to the phase sequence of the voltage connection piece and the current connection piece, and the upper side and the lower side of the box body are provided with character identifications according to the phase sequence identification.
Optionally, an insulating hole plug is arranged in the standby voltage inlet and outlet wiring hole and the standby current inlet and outlet wiring hole, and the insulating hole plug is pluggable.
Optionally, the metal material used for all the voltage channels and the current channels in the box body is copper.
Optionally, the box body and the box cover are made of high polymer polycarbonate materials and are in a fully transparent state.
The application discloses novel terminal box is united to three-phase four-wire, include: the testing device comprises a box body, a box cover, a voltage inlet and outlet wiring hole, a current inlet and outlet wiring hole, a voltage connecting sheet, a current connecting sheet, a voltage connecting plate, a current connecting plate, a testing voltage hole column and a testing current hole column, wherein threaded toothed grooves are formed inside and outside the testing voltage hole column and used for being connected into a voltage loop of an electric energy meter or a checking instrument in parallel, an L-shaped opening is formed in the top of the testing current hole column and used for being connected into the current loop of the electric energy meter or the checking instrument in series or in parallel, the voltage connecting sheet and the current connecting sheet are alternately distributed in the box body, the voltage connecting plate is provided with four groups which are A, B, C, N phases and respectively correspond to four-phase voltages of a three-phase four-wire combined junction box, the N phase is a neutral line, the current connecting plate is provided with three groups which are A, B, C phases and respectively correspond to three-phase currents, the front side of the current connecting plate is provided with a test current hole column and the current connecting plate, and the voltage inlet and outlet wiring hole and the current inlet and outlet wiring hole are positioned on the upper side and the lower side of the box body.
This application has solved current loop of current joint terminal box and can only establish ties electric energy meter or check-up instrument, and can not realize parallelly connected problem, has satisfied the requirement of the zero loss of electrified meter-changing electric quantity, and compare in current joint terminal box, the novel joint terminal box of this application is when carrying out the load check-up, connect the electric energy meter or the current wiring of check-up instrument in the front of joint terminal box, there is the touch screen cabinet when having solved current joint terminal box live working, the elasticity screw is wasted time and energy and the operating space scheduling problem that is not enough.
Drawings
In order to more clearly explain the technical solution of the present application, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious to those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a box body of a novel three-phase four-wire combined junction box provided in an embodiment of the present application;
fig. 2 is a schematic diagram of a back side of a box body of a novel three-phase four-wire combined junction box provided in an embodiment of the present application;
fig. 3 is a schematic top side view of a box body of a novel three-phase four-wire junction box according to an embodiment of the present disclosure;
fig. 4 is a schematic view of a lower side surface of a box body of a novel three-phase four-wire junction box provided by an embodiment of the present application;
fig. 5 is a schematic view of a screw-type tooth-shaped groove of a test voltage hole column of a novel three-phase four-wire junction box according to an embodiment of the present application;
fig. 6 is a schematic diagram of an L-shaped structure of a test current hole column of a novel three-phase four-wire junction box according to an embodiment of the present disclosure;
fig. 7 is a schematic view of an adjustable mounting mechanism of a novel three-phase four-wire junction box according to an embodiment of the present disclosure.
101-box body; 102-mounting holes; 103-hemispherical feet; 104-voltage connection board; 105-a current connection board; 106-test voltage well column; 107-test current well column; 108-voltage connection pad; 109-current connection piece; 110-voltage in and out wiring holes; 111-current in and out wiring holes; 112-insulating hole plug; 113-an adjustable mounting mechanism; 114-thread type tooth-like groove; a 115-L shaped opening; 116-an insulating cap; 117-character identification.
Detailed Description
In order to solve the problem that the current loop of the existing combined junction box can only be connected with an electric energy meter or a calibration instrument in series and can not realize parallel connection, the application discloses a novel three-phase four-wire combined junction box through each of the following embodiments.
The application discloses novel terminal box is united to three-phase four-wire, refers to the box body structure schematic diagram that fig. 1 shows, the terminal box includes: the test box comprises a box body 101, a box cover, a voltage inlet and outlet wiring hole 110, a current inlet and outlet wiring hole 111, a voltage connecting sheet 108, a current connecting sheet 109, a voltage connecting sheet 104, a current connecting sheet 105, a test voltage hole column 106 and a test current hole column 107.
Referring to the schematic diagram of the screw-type toothed groove of the test voltage hole column shown in fig. 5, the screw-type toothed groove 114 is arranged inside and outside the test voltage hole column 106, and the test voltage hole column 106 is used for being connected in parallel to a voltage loop of an electric energy meter or a calibration instrument.
The thread-type tooth-shaped groove 114 is beneficial to connecting the voltage connection wires of the test instrument or the electric energy meter more firmly and reliably.
Referring to the L-shaped structural schematic diagram of the test current hole column shown in fig. 6, an L-shaped opening 115 is arranged at the top of the test current hole column 107, and the test current hole column 107 is used for being connected in series or in parallel to a current loop of an electric energy meter or a calibration instrument.
The L-shaped opening 115 is beneficial to more firm and reliable connection of current wiring of a test instrument or an electric energy meter.
The voltage connection plates 104 and the current connection plates 105 are alternately arranged inside the box body 101, four groups of A, B, C, N phases of voltage connection plates are arranged on the voltage connection plates (104) and respectively correspond to four-phase voltages of the three-phase four-wire combined junction box, the N phase is a neutral line, three groups of A, B, C phases of current connection plates are arranged on the current connection plates (105) and respectively correspond to three-phase currents of the three-phase four-wire combined junction box.
The test voltage hole column 106 and the voltage connecting plate 108 are arranged on the front surface of the voltage connecting plate 104, and the test current hole column 107 and the current connecting plate 109 are arranged on the front surface of the current connecting plate 105.
The voltage inlet and outlet wiring hole 110 and the current inlet and outlet wiring hole 111 are located on the upper and lower sides of the case 101.
The operation steps of the electrified replacing method of the electric energy meter or the check meter are as follows:
the original electric energy meter is connected with the junction box, the current connecting sheet 109 on the upper side face of the box body 101 is clamped, the current connecting sheet 109 on the lower side face of the box body 101 is loosened, the voltage connecting sheet 108 is clamped, the voltage terminal of the test electric energy meter is sequentially and correspondingly connected to the test voltage hole column 106 of each group of voltage connecting plates 104, whether the voltage values of the original electric energy meter and the test electric energy meter are consistent or not is checked, whether the wiring is correct and firm or not is confirmed, and the bottom data of the test electric energy meter is recorded;
then, the current terminals of the test electric energy meter are sequentially and correspondingly connected to the test current hole columns 107 in series, the positive electrode of each current terminal can be connected to the first or second test current hole column 107 of each group of current connecting plates 105, the negative electrode of each current terminal is connected to the third test current hole column 107, a parallel connection relation is formed between the current terminals and the original electric energy meter, the current value of the test electric energy meter is measured and checked by using the pincer-shaped electric energy meter, and whether the wiring is correct and firm is confirmed;
sequentially removing current wiring of the original electric energy meter, marking and wrapping by using an insulating adhesive tape;
recording the background data of the original electric energy meter, sequentially removing the voltage wiring of the original electric energy meter, marking, and wrapping by using an insulating adhesive tape;
fixing a newly-installed electric energy meter on a screen cabinet, sequentially and correspondingly connecting a voltage terminal of the newly-installed electric energy meter to the test voltage hole column 106 of each group of voltage connecting plates 104, checking whether the voltage value of the newly-installed electric energy meter is consistent with that of the test electric energy meter, and determining whether wiring is correct and firm;
correspondingly connecting current terminals of the newly-installed electric energy meter to the test current hole columns 107 in sequence, connecting the positive electrode of each current terminal to the first or second test current hole column 107 of each group of current connecting plates 105, connecting the negative electrode of each current terminal to the third test current hole column 107, forming a parallel connection relation with the test electric energy meter, measuring and checking the current value of the newly-installed electric energy meter by using the pincerlike electric current meter, and determining whether the wiring is correct and firm;
sequentially removing current wiring of the electric energy meter to be tested, measuring and checking the current value of the newly-installed electric energy meter by using the pincerlike ammeter, and determining whether the wiring is completely removed;
recording the bottom data of the test electric energy meter again, wherein the electric quantity difference value of the test electric energy meter is the electric quantity lost during the meter changing period, and then sequentially dismantling the electric pressure connection wires of the test electric energy meter;
and after the meter is changed, confirming that the newly-installed electric energy meter works normally, and confirming the recorded bottom degree data of the changed electric energy meter, the electric quantity lost during the meter changing of the test electric energy meter and a customer.
The application discloses novel terminal box is united to three-phase four-wire, include: the testing device comprises a box body 101, a box cover, a voltage inlet and outlet wiring hole 110, a current inlet and outlet wiring hole 111, a voltage connecting sheet 108, a current connecting sheet 109, a voltage connecting sheet 104, a current connecting sheet 105, a testing voltage hole column 106 and a testing current hole column 107, wherein the inside and the outside of the testing voltage hole column 106 are respectively provided with a thread-shaped tooth-shaped groove 114 for being connected in parallel with a voltage loop of an electric energy meter or a checking instrument, the top of the testing current hole column 107 is provided with an L-shaped opening 115 for being connected in series or in parallel with a current loop of the electric energy meter or the checking instrument, the voltage connecting sheet 104 and the current connecting sheet 105 are alternately arranged inside the box body 101, the voltage connecting sheet 104 is provided with four groups which are A, B, C, N phases and respectively correspond to four-phase voltages of a three-phase four-wire combined junction box, the N phase is a neutral wire, the current connecting sheet 105 is provided with three groups which are A, B, C phases and respectively correspond to three-phase currents of the three-phase four-wire combined junction box, the front surface of the voltage connecting plate 104 is provided with a test voltage hole column 106 and the voltage connecting plate 108, the front surface of the current connecting plate 105 is provided with a test current hole column 107 and the current connecting plate 109, and the voltage inlet and outlet wiring hole 110 and the current inlet and outlet wiring hole 111 are positioned on the upper side and the lower side of the box body 101.
This application has solved current loop of current joint terminal box and can only establish ties electric energy meter or check-up instrument, and can not realize parallelly connected problem, has satisfied the requirement of the zero loss of electrified meter-changing electric quantity, and compare in current joint terminal box, the novel joint terminal box of this application is when carrying out the load check-up, connect the electric energy meter or the current wiring of check-up instrument in the front of joint terminal box, there is the touch screen cabinet when having solved current joint terminal box live working, the elasticity screw is wasted time and energy and the operating space scheduling problem that is not enough.
The voltage connecting plate 104 adopts a wiring mode of one wire inlet hole and multiple wire outlet holes, and each group of the voltage connecting plate 104 is provided with one test voltage hole column 106.
The current connecting plate 105 is composed of two to four mutually independent current channels, each independent current channel adopts a wiring mode of a wire inlet hole and a wire outlet hole, and each group of current connecting plate 105 is provided with three test current hole columns 107.
Further, 2 mounting holes 102 are formed in the left side and the right side of the box body 101, each mounting hole 102 is provided with an adjustable mounting mechanism 113, the schematic view of the adjustable mounting mechanism shown in fig. 7 shows that the adjustable mounting mechanism 113 is a long rectangular hollow metal sheet, and the bottom of the box body 101 is provided with hemispherical support legs 103.
Hemispherical supporting foot 103 makes box body 101 back and screen cabinet have certain space, can look over with the help of foreign object whether there is a damage in box body 101 back, adjustable installation mechanism 113 intersects suitable position, the position is corresponding with original mounting hole position on the screen cabinet, uses the screw to pass the position of original mounting hole on intersection position and the screen cabinet makes adjustable installation mechanism 113 is fixed, can be suitable for from this and go up original mounting hole on the screen cabinet, need not on the screen cabinet from newly punching.
Furthermore, an insulating cap 116 is arranged at one end of each of the voltage connecting piece 108 and the current connecting piece 109, the insulating caps 116 are marked with colors according to the phase sequence of the voltage connecting piece 108 and the current connecting piece 109, and character marks 117 marked with the phase sequence are arranged on the upper side and the lower side of the box body 101.
The insulating cap 116 and the character mark 117 can effectively improve the wiring accuracy of the joint junction box.
Further, the spare voltage inlet and outlet wiring hole 110 and the spare current inlet and outlet wiring hole 111 are internally provided with insulating hole plugs 112, and the insulating hole plugs 112 are pluggable.
The insulating hole plug 112 can effectively improve the wiring accuracy of the combined junction box.
Furthermore, all the voltage channels and current channels in the box 101 are made of copper.
Further, the box body 101 and the box cover are made of high polymer polycarbonate materials and are in a full transparent state.
Wherein, the box body 101 and the box cover adopt a full transparent appearance form, which can prevent the electricity stealing person from changing in the box body 101 and at the back.
The present application has been described in detail with reference to specific embodiments and illustrative examples, but the description is not intended to limit the application. Those skilled in the art will appreciate that various equivalent substitutions, modifications or improvements may be made to the presently disclosed embodiments and implementations thereof without departing from the spirit and scope of the present disclosure, and these fall within the scope of the present disclosure. The protection scope of this application is subject to the appended claims. .
Claims (8)
1. The utility model provides a novel terminal box is united to three-phase four-wire which characterized in that includes: the device comprises a box body (101), a box cover, a voltage inlet and outlet wiring hole (110), a current inlet and outlet wiring hole (111), a voltage connecting sheet (108), a current connecting sheet (109), a voltage connecting sheet (104), a current connecting sheet (105), a test voltage hole column (106) and a test current hole column (107);
the test voltage hole column (106) is internally and externally provided with threaded toothed grooves (114), the test voltage hole column (106) is used for being connected into a voltage loop of an electric energy meter or a calibration instrument in parallel, the top of the test current hole column (107) is provided with an L-shaped opening (115), and the test current hole column (107) is used for being connected into a current loop of the electric energy meter or the calibration instrument in series or in parallel;
the voltage connecting plates (104) and the current connecting plates (105) are alternately arranged in the box body (101), four groups of A, B, C, N phases of voltage connecting plates are arranged on the voltage connecting plates (104) and respectively correspond to four-phase voltages of the three-phase four-wire combined junction box, the N phase is a neutral line, three groups of A, B, C phases of current connecting plates are arranged on the current connecting plates (105) and respectively correspond to three-phase currents of the three-phase four-wire combined junction box;
the test voltage hole column (106) and the voltage connecting sheet (108) are arranged on the front surface of the voltage connecting plate (104), and the test current hole column (107) and the current connecting sheet (109) are arranged on the front surface of the current connecting plate (105);
the voltage inlet and outlet wiring hole (110) and the current inlet and outlet wiring hole (111) are positioned on the upper side and the lower side of the box body (101).
2. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein said voltage connection board (104) is in the form of a one-wire-inlet-hole multi-wire-outlet-hole connection, and one said test voltage hole pillar (106) is provided on each said voltage connection board (104).
3. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein the current connection plate (105) is composed of two to four mutually independent current channels, each independent current channel is in the form of a wire connection with a wire inlet and a wire outlet, and each group of the current connection plate (105) is provided with three test current hole columns (107).
4. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein 2 mounting holes (102) are formed in each of the left side and the right side of the box body (101), each mounting hole (102) is provided with an adjustable mounting mechanism (113), each adjustable mounting mechanism (113) is a long rectangular hollow metal sheet, and hemispherical support legs (103) are arranged at the bottom of the box body (101).
5. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein an insulating cap (116) is arranged at one end of each of the voltage connecting piece (108) and the current connecting piece (109), the insulating caps (116) are marked with colors according to the phase sequence of the voltage connecting piece (108) and the current connecting piece (109), and character marks (117) marked according to the phase sequence are arranged on the upper side and the lower side of the box body (101).
6. The novel three-phase four-wire united junction box as claimed in claim 1, wherein the spare voltage inlet and outlet wiring holes (110) and current inlet and outlet wiring holes (111) are provided with insulation hole plugs (112), and the insulation hole plugs (112) are pluggable.
7. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein all voltage channels and current channels in the box body (101) are made of copper.
8. The novel three-phase four-wire combined junction box as claimed in claim 1, wherein the box body (101) and the box cover are made of high polymer polycarbonate material and are in a fully transparent state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022441723.9U CN213843308U (en) | 2020-10-29 | 2020-10-29 | Novel three-phase four-wire combined junction box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022441723.9U CN213843308U (en) | 2020-10-29 | 2020-10-29 | Novel three-phase four-wire combined junction box |
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| Publication Number | Publication Date |
|---|---|
| CN213843308U true CN213843308U (en) | 2021-07-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022441723.9U Active CN213843308U (en) | 2020-10-29 | 2020-10-29 | Novel three-phase four-wire combined junction box |
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| Country | Link |
|---|---|
| CN (1) | CN213843308U (en) |
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- 2020-10-29 CN CN202022441723.9U patent/CN213843308U/en active Active
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