CN103698733B - A kind of test connection terminal assemblies for electric energy metrical - Google Patents

Abstract

The invention relates to a test terminal assembly for electric energy metering, which includes support plates with guide rails on the left and right sides, A-C phase current terminal, zero-phase current terminal, A-C phase voltage terminal, zero-phase voltage Terminals, first plugs and second plugs; each terminal row is sequentially installed on the guide rail of the pallet. The beneficial effect of the present invention is that it improves the work efficiency when changing the meter, and effectively eliminates the occurrence of open circuit of the current secondary circuit, short circuit of the voltage secondary circuit or grounding accident; it not only reduces the workload of infrastructure construction personnel, but also shortens the metering time. The time for checking the line when the circuit is faulty; avoiding the voltage loss of the voltage secondary circuit caused by the work, which also reduces the power supply work; effectively preventing the voltage short circuit or grounding accident during work; the disadvantages of using the current clamp to measure the current Solved; the process of replacing the socket of the terminal block is simple.

Description

A test terminal assembly for electric energy metering

technical field

The invention relates to a test connection terminal assembly for electric energy metering, which is used for on-site calibration of electric energy meters and replacement of electric energy meters by electric energy metering professionals.

Background technique

Due to the display failure of the electric energy meter screen, measurement error exceeding the limit, program failure, internal voltage component failure, internal current component failure, RS485 communication module failure and other reasons, the electric energy meter should be replaced, and it should be replaced regularly according to the measurement regulations. Every year, the power supply companies in various cities in Hebei Southern Grid replace a large number of electric energy meters; in addition, the on-site calibration of electric energy meters is also an important item in the daily work items of the metering profession.

At present, the current situation of the secondary circuit measurement of power supply companies in various cities in the southern power grid of Hebei Province: There are many substations that have been in operation for many years, and their terminal blocks are all old-fashioned terminals, and the terminal wiring marks are unclear, causing many problems for the measurement work. The main problems are as follows:

(1) When changing and calibrating the meter, the staff first find out the measurement secondary current circuit and the measurement secondary voltage circuit from the numerous circuits of the terminal block based on experience, and there are problems of finding the wrong circuit and wasting time.

(2) When replacing the electric energy meter, it is necessary to short-circuit the current secondary circuit with a special short-circuit wire. When short-circuiting the current secondary circuit, the staff needs to hold the rest of the short-circuit wire ends in their hands, so as to avoid the grounding short circuit caused by the rest of the short-circuit wire ends touching the voltage secondary circuit by mistake. Due to the shape (plug-in type) of the short terminal, sometimes the contact area with the crimping screw is very small, which is easy to cause an open circuit and endanger the safety of people, equipment and power grid.

(3) In some substations, the terminals are aging and the contact resistance value is large. Sometimes it is necessary to short-circuit two or even three short-circuits to replace the meter, which poses a great safety risk.

(4) When replacing the energy meter, the voltage secondary circuit needs to be disconnected. There are two main ways to disconnect the voltage secondary circuit: a. Disconnect the voltage secondary line from the terminal row to the side of the electric energy meter. Disconnecting the wiring is not only time-consuming and laborious, but also has the risk of grounding short circuit of the voltage secondary circuit. b. Directly remove the voltage secondary line at the end of the electric energy meter, and insulate it with insulating tape. During the working process, since the voltage secondary line at the end of the electric energy meter is always charged, the staff must be very careful, otherwise it is easy to cause a short circuit of the voltage secondary circuit or a grounding accident. One point that needs special emphasis is that the metering voltage secondary circuit and the protection voltage secondary circuit of some substations are shared circuits. If the metering secondary voltage circuit is short-circuited or grounded, the protection voltage will also be lost at this time, and the protection device will If the protection function is lost, if the line fails at this time, the protection device will not act, and the consequences will be disastrous.

(5) Some substations have installed a test junction box in the metering secondary circuit, which reduces the risk of replacing and calibrating the energy meter to a certain extent and improves work efficiency, but this is still not the best. First of all, after the test junction box is installed, the nodes of the secondary circuit will increase, and the fault points will also increase. Finding increases the difficulty; secondly, when restoring the voltage connection and current connection of the test junction box after changing the meter, it is necessary to prevent the screwdriver from accidentally touching the secondary circuit of the voltage or causing a grounding accident. If the personnel make mistakes in their work and make the wrong connection, it will cause an open circuit accident in the secondary circuit of the current. So using a test junction box is not foolproof.

(6) At present, there are two wiring methods for on-site calibration of electric energy meters, the main difference lies in the wiring of the current loop. One is to use the current test line to be directly connected in series to the secondary circuit of the metering current, and the other is to use the current clamp to pinch the current. For old-fashioned terminals, the first method is to connect the current test wire to the current terminal, and then open the current plug of the current terminal. Since the plug head of the old-fashioned terminal is made of plastic, it will inevitably age and become brittle over time. ,easily damaged. At this time, when the staff is opening and restoring the plug, they dare not use force, especially if they do not use force when restoring the plug, they are worried that the unreliable connection of the secondary circuit of the current will cause an open circuit, which will bring inconvenience to the work. The second wiring method adopts the current clamp and does not need to be connected in series with the secondary circuit of the current, so the safety of the work is improved and the work efficiency is improved. However, the current clamp is based on the principle of electromagnetic induction to pinch the secondary current and measure it , it is necessary to place the secondary line of the measured current at the center of the jaws of the current clamp as much as possible, and ensure that there is no dust inside the jaws, otherwise the measurement error will increase. For the current secondary line covered with a plastic sleeve, the jaws of the current clamp often cannot be completely closed during current measurement, the measured value is inaccurate, the measurement result is meaningless, and the calibration work cannot be performed. Compared with the first measurement method, the accuracy of the second measurement method is lower and the measurement error is larger. In addition, in actual work, due to the large jaws of the current clamp, in order to conveniently pick up the current, the staff will often twist the measured current wire, which may cause loosening of the wiring screws or open circuit of the secondary circuit of the current. The voltage test line adopts metal clips. When connecting the voltage test line, the staff need to clamp the clips to the Ua, Ub, Uc, and Un voltage terminals (screws) of the voltage secondary circuit. Due to the weight of the voltage test line, the When calibrating the electric energy meter, the phenomenon of clip slipping and popping often occurs (even if the voltage test line is found in a suitable position as a support to overcome the influence of its own weight, sometimes the phenomenon of clip slipping and popping will occur), which poses a safety hazard.

Contents of the invention

The technical problem to be solved by the present invention is to provide a test terminal assembly for electric energy measurement which is easy to operate, safe and fast.

In order to solve the above problems, the present invention adopts the following technical solutions:

A test terminal assembly for electric energy metering, including supporting plates with guide rails on the left and right sides, A-C phase current terminal, zero-phase current terminal, A-C phase voltage terminal, zero-phase voltage terminal, first plug and The second plug; the connecting terminals are sequentially installed on the guide rail of the pallet;

The A-phase current terminal includes a first terminal insulating body, two first cylindrical sockets, a metal sliding piece and two first metal conductors;

There are two left and right first chambers inside the insulating body of the first terminal, and the two first metal conductors are respectively located in the two first chambers, and are respectively connected to the first chambers. Adaptation; the upper part of the insulating body of the first terminal is provided with first socket holes respectively located above the two first chambers;

The upper part of the first cylindrical socket is a cylindrical first insulating socket body, the lower part is a first metal connecting seat with external threads, and the first insulating socket body is fixedly connected to the first metal connecting seat; The first insulating socket body is provided with at least two first metal pin tubes connected to the first metal connection seat; the first insulating socket body is adapted to the first socket hole, and the first metal The connecting seat is threadedly connected with the first metal conductor;

The upper part of the insulating main body of the first terminal is provided with a slot hole between the two first chambers that is suitable for the first screw, and the bottom of the slot hole is higher than the bottom of the first chamber ; The corresponding ends of the two first metal conductors and the bottom of the slot hole are provided with guide grooves, and the guide grooves are matched with the two ends of the metal sliding sheet; the first screw and the metal The sliding piece is threaded and protrudes from the top surface of the insulating body of the first terminal;

The left and right ends of the lower part of the insulating body of the first terminal are provided with card slots matching the guide rails of the supporting plate; the left and right sides of the insulating body of the first terminal are provided with The first through hole communicates with each other; the end surface of the first metal conductor is provided with a first blind hole corresponding to the first through hole; the left and right ends of the upper surface of the first terminal insulating body are respectively provided with first pressure Wire screw holes, the first wire-pressing screws located in the first wire-pressing screw holes respectively press the external wires located at the first blind holes;

The structure of the B-phase current connection terminal and the C-phase current connection terminal is the same as that of the A-phase current connection terminal;

The zero-phase current connection terminal includes a second terminal insulating body, two second cylindrical sockets and a second metal conductor; a second chamber is provided inside the second terminal insulating body, and the second metal conductor is placed In the second chamber, and compatible with the second chamber; the upper part of the insulating body of the second terminal is provided with two second socket holes;

The structure of the second cylindrical socket is the same as that of the first cylindrical socket, and the second cylindrical socket includes a second metal connection base, a second insulating socket body and a second metal pin tube; the second insulating The socket body is adapted to the second socket hole, and the second metal connection seat is threadedly connected to the second metal conductor;

The left and right ends of the lower part of the insulating body of the second terminal are provided with card slots adapted to the guide rails of the supporting plate; The end surface of the second metal conductor is provided with a second blind hole corresponding to the second through hole; the left and right ends of the upper surface of the second terminal insulating body are respectively provided with a second Two crimping screw holes, the second crimping screws located in the second crimping screw holes respectively press the external wires located in the second blind holes;

The zero-phase voltage terminal has the same structure as the zero-phase current terminal;

The phase A voltage terminal includes a third terminal insulating body, a third cylindrical socket, a fourth cylindrical socket, a third metal conductor and a fourth metal conductor; the left and right ends of the third terminal insulating body are respectively provided with The third chamber and the fourth chamber, the length of the left and right ends of the third chamber is greater than the length of the left and right ends of the fourth chamber; the third metal conductor and the fourth metal conductor are respectively located in the third chamber, In the fourth chamber, it is respectively adapted to the third chamber and the fourth chamber; the upper part of the insulating body of the third terminal is provided with a third socket hole above the third chamber; the third The upper part of the terminal insulating body is provided with a fourth socket hole between the third chamber and the fourth chamber;

The third cylindrical socket has the same structure as the first cylindrical socket, and the third cylindrical socket includes a third metal connection seat, a third insulating socket body and a third metal pin tube; the third insulating The socket body is adapted to the third socket hole, and the third metal connection seat is threadedly connected to the third metal conductor;

The upper part of the fourth cylindrical socket is a cylindrical fourth insulating socket body, and the lower part is a fourth metal connection seat with external threads, and the fourth insulating socket body is fixedly connected to the fourth metal connection seat; The middle of the fourth cylindrical socket is a vertical insulation isolation plate, and the vertical insulation isolation plate is fixedly connected with the fourth insulation socket body and the fourth metal connection seat respectively; There are at least two fourth metal pin tubes connected to the fourth metal connection seat; the fourth insulated socket body is suitable for the fourth socket hole, and the fourth metal connection seat is simultaneously connected to the third metal conductor, The fourth metallic conductor is threaded;

The left and right ends of the lower part of the insulating body of the third terminal are provided with card slots adapted to the guide rails of the supporting plate; the left and right sides of the insulating body of the third terminal are respectively provided with , the third through hole and the fourth through hole communicated with the fourth chamber; the end faces of the third metal conductor and the fourth metal conductor are respectively provided with a third blind hole corresponding to the third through hole, and a third blind hole corresponding to the third through hole. The fourth blind hole corresponding to the fourth through hole; the left and right ends of the upper surface of the third terminal insulating body are respectively provided with a third crimping screw hole and a fourth crimping screw hole; The third crimping screw in the screw hole presses the external lead in the third blind hole; the fourth crimping screw in the fourth crimping screw presses the external lead in the fourth blind hole External wire;

The first plug includes a first insulating body, at least two first pins, a first metal disc and wires; a fifth chamber is provided on the left side of the first insulating body, and the first metal disc Located in the fifth chamber, which is compatible with the fifth chamber; the right side of the first insulating body is provided with a fifth through hole communicating with the fifth chamber, and the wire It is fixedly connected to the first metal plate through the fifth through hole; one end of the first pin is fixedly connected to the first metal circular plate, and the other end protrudes from the left side of the fifth chamber wall;

The second plug includes a second insulating body, at least two second pins and a second metal disc; a sixth chamber is provided on the left side of the second insulating body, and the second metal disc is placed In the sixth chamber, and compatible with the sixth chamber; one end of the second pin is fixedly connected with the second metal circular plate, and the other end extends out of the sixth chamber left side wall.

The upper insulating part of each socket is provided with vertical stripes.

The beneficial effects of the present invention are:

(1) When changing the meter, the staff only need to insert the short circuit plug of the current, pull out the plug of the voltage, and do the opposite when restoring, which greatly improves the work efficiency and effectively prevents the open circuit of the secondary circuit of the current and the secondary voltage of the voltage. Loop short circuit or ground fault occurs.

(2) If the present invention can be used in a new substation, the test junction box can be omitted, reducing the number of nodes in the circuit, which not only reduces the workload of infrastructure construction personnel, but also brings convenience to the measurement staff for checking and checking lines. At the same time, the time for checking the line when the metering circuit fails is also shortened.

(3) The use of the present invention avoids the voltage loss of the voltage secondary circuit caused by the work, and also reduces the power recovery work. (For the substation where the metering point is moved down, if one metering voltage secondary circuit is short-circuited or grounded, the corresponding PT secondary voltage of the entire busbar will lose voltage, and all outgoing watt-hour meters will measure less electricity due to the loss of voltage, giving The power replenishment work makes it difficult.)

(4) Since the voltage test line adopts the plug-in method, its connection is reliable, and the plug adopts good insulation measures, which effectively prevents the occurrence of voltage secondary circuit short circuit or grounding accidents during work.

(5) When calibrating the electric energy meter, the disadvantages of using the current clamp to measure the current have been solved, and the test error data is more accurate and convincing.

(6) For the current terminal, when the socket on one side of the electric energy meter is deformed or damaged by external force and affects the daily work of measurement, you only need to short-circuit the socket on the side connected to the secondary line of the current transformer with a special short wire, and then you can Remove the power meter side socket (damaged socket) and install a new socket. This process does not require a power outage, which avoids the situation that the current transformer must be powered off to replace it in the integrated connection mode.

(7) It is more convenient for the voltage terminal, just remove the socket and replace it with a new socket, avoiding the short circuit of the voltage secondary circuit or grounding accident caused by dismantling the voltage secondary wire.

(8) The current terminal is designed with a guide groove, so that the sliding piece can slide freely in the guide groove, and the guide is accurate.

(9) The upper insulating part of each socket is provided with vertical stripes to increase its friction, which is convenient for the metering staff to install and replace the socket.

Description of drawings

Fig. 1 is the front view of the present invention;

Fig. 2 is the top view of the present invention;

Fig. 3 is the left view of the present invention;

Fig. 4 is the front view of the A-phase current terminal;

Fig. 5 is a top view of a phase A current terminal;

Fig. 6 is a D-D sectional view of Fig. 5;

Fig. 7 is A-A sectional view of Fig. 2;

Fig. 8 is the B-B sectional view of Fig. 2;

Fig. 9 is the first plug;

Figure 10 is the second plug;

Fig. 11 is a schematic diagram of field work of the present invention.

detailed description

From the embodiment shown in Figure 1-11, it can be known that this embodiment includes a pallet 1 with guide rails on the left and right sides, A-C phase current connection terminals, zero-phase current connection terminals, A-C phase voltage connection terminals, zero-phase voltage connection terminals, The first plug and the second plug; the connecting terminals are sequentially installed on the guide rail of the pallet 1;

The A-phase current connection terminal includes a first terminal insulating body 4, two first cylindrical sockets, a metal sliding piece 5 and two first metal conductors 6;

The inside of the first terminal insulating body 4 is provided with left and right first cavities 7, and the two first metal conductors 6 are respectively located in the two first cavities 7, and are connected to the first cavities respectively. One chamber 7 is matched; the upper part of the first terminal insulating body 4 is provided with first socket holes 8 respectively located above the two first chambers 7;

The upper part of the first cylindrical socket is a cylindrical first insulating socket body 15, and its lower part is a first metal connection seat 16 with external threads, and the first insulating socket body 15 is connected to the first metal connection seat. 16 is fixedly connected; the first insulating socket body 15 is provided with at least two first metal pin tubes 17 connected to the first metal connection base 16; the first insulating socket body 15 is connected to the first socket The holes 8 are matched, and the first metal connecting seat 16 is screwed to the first metal conductor 7;

The upper part of the first terminal insulating body 4 is provided with a slot 10 between the two first cavities 7 that fits with the first screw 11, and the bottom of the slot 10 is higher than the first screw 11. The bottom of a chamber 7; the corresponding ends of the two first metal conductors 6 and the bottom of the slot 10 are provided with guide grooves 9, and the guide grooves 9 are suitable for the two ends of the metal sliding sheet 5 matching; the first screw 11 is threadedly connected with the metal sliding piece 5, and protrudes from the top surface of the insulating body 4 of the first terminal;

The left and right ends of the lower part of the first terminal insulating body 4 are provided with card slots matching the guide rails of the supporting plate 1; the left and right sides of the first terminal insulating body 4 are provided with A first through hole 12 communicating with the cavity 7; the end surface of the first metal conductor 6 is provided with a first blind hole 13 corresponding to the first through hole 12; the upper surface of the first terminal insulating body 4 First crimping screw holes are respectively provided at the left and right ends, and the first crimping screws 14 located in the first crimping screw holes respectively press the external wires located in the first blind holes 13;

The structure of the B-phase current connection terminal and the C-phase current connection terminal is the same as that of the A-phase current connection terminal;

The zero-phase current connection terminal includes a second terminal insulating body 18, two second cylindrical sockets and a second metal conductor 20; the second terminal insulating body 18 is provided with a second chamber 21 inside, and the second The metal conductor 20 is placed in the second chamber 21 and is adapted to the second chamber 21; the upper part of the second terminal insulating body 18 is provided with two second socket holes 22;

The structure of the second cylindrical socket is the same as that of the first cylindrical socket, and the second cylindrical socket includes a second metal connection seat 50, a second insulating socket body 51 and a second metal pin tube 52; The second insulating socket body 51 is adapted to the second socket hole 22, and the second metal connecting seat 50 is screwed to the second metal conductor 20;

The left and right ends of the lower part of the second terminal insulating body 18 are provided with card slots matching the guide rails of the supporting plate 1; the left and right sides of the second terminal insulating body 18 are provided with The second through hole 24 communicating with the two chambers 21, the end surface of the second metal conductor 20 is provided with a second blind hole 26 corresponding to the second through hole 24; the second terminal insulating body 18 The left and right ends of the upper surface are respectively provided with second thread-pressing screw holes, and the second thread-pressing screws 19 located in the second thread-pressing screw holes respectively press the external wires located in the second blind holes 26;

The zero-phase voltage terminal has the same structure as the zero-phase current terminal;

The phase A voltage connection terminal includes a third terminal insulating body 27, a third cylindrical socket, a fourth cylindrical socket, a third metal conductor 30 and a fourth metal conductor 31; the left and right sides of the third terminal insulating body 27 are The third chamber 32 and the fourth chamber 33 are respectively provided at the ends, the length of the left and right ends of the third chamber 32 is greater than the length of the left and right ends of the fourth chamber 33; the third metal conductor 30, the fourth metal conductor 31 are respectively located in the third chamber 32 and the fourth chamber 33, and are respectively adapted to the third chamber 32 and the fourth chamber 33; The third socket hole 34 above the third chamber 32; the upper part of the third terminal insulating body 27 is provided with a fourth socket hole 35 between the third chamber 32 and the fourth chamber 33;

The third cylindrical socket has the same structure as the first cylindrical socket, and the third cylindrical socket includes a third metal connection seat 53, a third insulating socket body 54 and a third metal pin tube 55; The third insulating socket body 54 is adapted to the third socket hole 34, and the third metal connecting seat 53 is screwed to the third metal conductor 30;

The top of the fourth cylindrical socket is a cylindrical fourth insulating socket body 57, and its lower part is a fourth metal connection seat 56 with external threads, and the fourth insulating socket body 57 is connected to the fourth metal connection seat. 56 are fixedly connected; the middle of the fourth cylindrical socket is a vertical insulating isolation plate 58, and the vertical insulating isolation plate 58 is fixedly connected with the fourth insulating socket body 57 and the fourth metal connection seat 56 respectively; The fourth insulating socket body 57 is provided with at least two fourth metal pin tubes 59 connected to the fourth metal connection seat 56; the fourth insulating socket body 57 is compatible with the fourth socket hole 35 , the fourth metal connection seat 56 is threadedly connected to the third metal conductor 30 and the fourth metal conductor 31 at the same time;

The left and right ends of the lower part of the third terminal insulating body 27 are provided with card slots matching the guide rails of the supporting plate 1; the left and right sides of the third terminal insulating body 27 are respectively provided with The third through hole 36 and the fourth through hole 37 communicated with the third chamber 32 and the fourth chamber 33; the end faces of the third metal conductor 30 and the fourth metal conductor 31 are respectively provided with the third through hole 36 The corresponding third blind hole 38, the fourth blind hole 39 corresponding to the fourth through hole 37; the left and right ends of the upper surface of the third terminal insulating body 27 are respectively provided with a third crimping screw hole, The fourth crimping screw hole; the third crimping screw 40 located in the third crimping screw hole presses the external wire located in the third blind hole 38; the third crimping screw located in the fourth crimping screw hole The fourth crimping screw 41 presses the external wire located in the fourth blind hole 39;

The first plug includes a first insulating body 61, at least two first pins 62, a first metal disc 63 and wires 68; the left side of the first insulating body 61 is provided with a fifth chamber, the The first metal circular plate 63 is located in the fifth chamber, which is suitable for the fifth chamber; the right side of the first insulating body 61 is provided with a second chamber communicating with the fifth chamber. Five through holes 64, the wire is fixedly connected to the first metal plate through the fifth through hole 64; one end of the first pin 62 is fixedly connected to the first metal circular plate 63, and the other end protruding from the left side wall of the fifth chamber;

The second plug includes a second insulating body 65, at least two second pins 66 and a second metal disc 67; the left side of the second insulating body 65 is provided with a sixth chamber, the second metal The circular plate 67 is placed in the sixth chamber and is suitable for the sixth chamber; one end of the second pin 66 is fixedly connected with the second metal circular plate 67, and the other end extends out the left side wall of the sixth chamber.

The upper insulating part of each socket is provided with vertical stripes.

The workflow of this embodiment is as follows:

As shown in Figure 11, U _A , U _B , U _C of the voltage transformer are their primary terminals, and U _a , U _b , U _c , U _n are their secondary terminals; I _A , I _B , I _C are its primary terminals, I _a , I _b , I _c , and _In are its secondary terminals. At the work site, the primary terminals U _A , U _B , and U _C of the voltage transformer are connected to the primary busbar, and the secondary terminals U _a , U _b , U _c , U _n are respectively connected to the AN phase of the present invention (see Figure 2). The through hole on the right side of the voltage terminal is pressed by the pressure screw; the an-phase voltage terminal of the electric energy meter is respectively pressed by the pressure screw through the through hole on the left side of the AN phase voltage terminal of the present invention; the primary wiring of the current transformer The terminals I _A , I _B , and I _C are connected to the primary busbar, and the secondary terminals I _a , I _b , I _c , and I _n are respectively pressed through the through holes on the right side of the AN phase current terminal of the present invention (see Figure 2). The wire screw is pushed down; the an-phase current terminal of the electric energy meter is pushed down by the wire-pressing screw through the through hole on the left side of the AN-phase current connection terminal of the present invention respectively.

If the four second plugs are inserted into the socket on the right side of the A-N phase voltage terminal of the present invention, and the sliding plate of the A-C phase current terminal is slid to the on position, the electric energy meter works normally.

When checking the electric energy meter, insert 4 first plugs into the socket on the left side of the A-N phase voltage terminal of the present invention, and connect the lead ends of the 4 first plugs to the corresponding ends of the field calibrator of the electric energy meter respectively; Insert the 6 first plugs into the sockets on the left and right sides of the A-C phase current terminal of the present invention, respectively connect the wire ends of the 6 first plugs to the corresponding ends of the electric energy meter field calibrator, and connect the sliding pieces of the A-C phase current terminal Slide to the disconnected position, and the calibration work of the electric energy meter can be carried out.

When changing the electric energy meter, 4 second plugs are pulled out from the socket on the right side of the A-N phase voltage terminal of the present invention; 4 first plugs are inserted into the socket on the left side of the A-N phase current terminal of the present invention, and the 4 The four wire ends of the first plug are short-circuited, and the energy meter can be replaced.

In actual work, it is necessary to calculate and design the screw-in stroke of the right socket of the voltage terminal when it is screwed into the bottom, so that the vertical insulation isolation plate in the middle of the fourth cylindrical socket is insulated from the third terminal of the voltage terminal. Between the third metal conductor and the fourth metal conductor in the third chamber and the fourth chamber of the main body, ensure that the third metal conductor and the fourth metal conductor are insulated and isolated, and the out-of-band of the fourth cylindrical socket The metal conductors of the threaded fourth metal connection seat are respectively connected to the third metal conductor and the fourth metal conductor. In order to facilitate the identification of the staff, a vertical alignment line can be set at the corresponding position of the socket and the insulating body of the third terminal. The position of the alignment line judges whether the screw-in position of the socket meets the requirements.

Each connection terminal of the present invention is identified by phase color and characters, which is not only beautiful but also convenient for measurement workers to identify.

Claims (1)

1. the test connection terminal assemblies for electric energy metrical, it is characterised in that: include the supporting plate of left and right sides band guide rail (1), A-C phase current binding post, Zero-phase current binding post, A-C phase voltage binding post, zero phase voltage binding post, One plug and the second plug；Described each binding post is sequentially arranged on the guide rail of described supporting plate (1)；

Described A phase current binding post includes the first terminal insulating body (4), 2 the first cylindrical sockets, metallic sliding disk (5) With 2 piece of first metallic conductor (6)；

Described the first terminal insulating body (4) is internal is provided with left and right 2 the first chambers (7), described 2 piece of first metallic conductor (6) Lay respectively in described 2 the first chambers (7), and suitable with described first chamber (7) respectively；The insulation of described the first terminal is main Body (4) top is provided with the first socket aperture (8) laying respectively at described 2 the first chambers (7) top；

The top of described first cylindrical socket is the first cylindrical insulated receptacle body (15), and its underpart is band externally threaded first Metal-connecting seat (16), described first insulated receptacle body (15) is fixing with described first metal-connecting seat (16) to be connected；Described One insulated receptacle body (15) is provided with at least 2 the first metal ferrule pipes being connected with described first metal-connecting seat (16) (17)；Described first insulated receptacle body (15) is suitable with described first socket aperture (8), described first metal-connecting seat (16) with Described first metallic conductor (7) is threaded；

The top of described the first terminal insulating body (4) is provided with and suitable with the first screw (11) is positioned at described 2 the first chambeies Slotted eye (10) between room (7), the bottom of described slotted eye (10) is higher than the bottom of described first chamber (7)；Described 2 piece of first gold medal Belonging to conductor (6) and be equipped with gathering sill (9) with the corresponding end in described slotted eye (10) bottom, described gathering sill (9) is sliding with described metal The two ends of moving plate (5) are suitable；Described first screw (11) threadeds with described metallic sliding disk (5), and stretches out described The end face of the first terminal insulating body (4)；

The two ends, left and right, bottom of described the first terminal insulating body (4) are equipped with the card suitable with the guide rail of described supporting plate (1) Groove；The left and right sides of described the first terminal insulating body (4) are equipped with the first through hole communicated with described first chamber (7) (12)；Described first metallic conductor (6) end face is provided with first blind hole (13) corresponding with described first through hole (12)；Described It is respectively arranged at two ends with the first line pressing bolt hole about the upper surface of one terminal insulative main body (4), is positioned at described first line pressing bolt The first line pressing bolt (14) in hole pushes down the external wire being positioned in described first blind hole (13) respectively；

Described B phase current binding post, C phase current binding post are identical with the structure of A phase current binding post；

Described Zero-phase current binding post includes that the second terminal insulative main body (18), 2 the second cylindrical sockets and the second metal are led Body (20)；Described second terminal insulative main body (18) is internal is provided with the second chamber (21), and described second metallic conductor (20) is placed in In described second chamber (21) and suitable with described second chamber (21)；The top of described second terminal insulative main body (18) It is provided with 2 the second socket apertures (22)；

Described second cylindrical socket is identical with the structure of described first cylindrical socket, and described second cylindrical socket includes the second metal Connect seat (50), the second insulated receptacle body (51) and the second metal ferrule pipe (52)；Described second insulated receptacle body (51) and institute Stating the second socket aperture (22) suitable, described second metal-connecting seat (50) threadeds with described second metallic conductor (20)；

The two ends, left and right, bottom of described second terminal insulative main body (18) are equipped with the card suitable with the guide rail of described supporting plate (1) Groove；The left and right sides of described second terminal insulative main body (18) are equipped with second be connected with described second chamber (21) and lead to Hole (24), the end face of described second metallic conductor (20) is provided with second blind hole (26) corresponding with described second through hole (24)； It is respectively arranged at two ends with the second line pressing bolt hole about the upper surface of described second terminal insulative main body (18), is positioned at described second pressure The second line pressing bolt (19) in line screw hole pushes down the external wire being positioned in described second blind hole (26) respectively；

Described zero phase voltage binding post is identical with the structure of described Zero-phase current binding post；

Described A phase voltage binding post include the 3rd terminal insulative main body (27), the 3rd cylindrical socket, the 4th cylindrical socket, Three metallic conductors (30) and the 4th metallic conductor (31)；It is respectively arranged at two ends with about described 3rd terminal insulative main body (27) inside 3rd chamber (32) and the 4th chamber (33), the length at described 3rd chamber (32) two ends, left and right is more than the 4th chamber (33) left and right The length at two ends；Described 3rd metallic conductor (30), the 4th metallic conductor (31) lay respectively at described 3rd chamber (32), the 4th In chamber (33) and suitable with described 3rd chamber (32), the 4th chamber (33) respectively；In described 3rd terminal insulative main body Portion is provided with the 3rd socket aperture (34) being positioned at the 3rd chamber (32) top；The top of described 3rd terminal insulative main body (27) is provided with It is positioned at the 4th socket aperture (35) between described 3rd chamber (32) and the 4th chamber (33)；

Described 3rd cylindrical socket is identical with the structure of described first cylindrical socket, and described 3rd cylindrical socket includes the 3rd metal Connect seat (53), the 3rd insulated receptacle body (54) and the 3rd metal ferrule pipe (55)；Described 3rd insulated receptacle body (54) and institute Stating the 3rd socket aperture (34) suitable, described 3rd metal-connecting seat (53) is threadeded with described 3rd metallic conductor (30)；

The top of described 4th cylindrical socket is the 4th cylindrical insulated receptacle body (57), and its underpart is band the externally threaded 4th Metal-connecting seat (56), described 4th insulated receptacle body (57) is fixing with described 4th metal-connecting seat (56) to be connected；Described The centre of four cylindrical sockets is for being vertically dielectrically separated from plate (58), and the described plate (58) that is vertically dielectrically separated from insulate with the described 4th respectively Socket (57), the 4th metal-connecting seat (56) are fixing to be connected；Described 4th insulated receptacle body (57) is provided with at least 2 and institute State the 4th metal ferrule pipe (59) that the 4th metal-connecting seat (56) is connected；Described 4th insulated receptacle body (57) and the described 4th Socket aperture (35) is suitable, with the 3rd metallic conductor (30), the 4th metallic conductor while of described 4th metal-connecting seat (56) (31) threaded；

The two ends, left and right, bottom of described 3rd terminal insulative main body (27) are equipped with the card suitable with the guide rail of described supporting plate (1) Groove；The left and right sides of described 3rd terminal insulative main body (27) be provided with respectively with described 3rd chamber (32), the 4th chamber (33) third through-hole (36) that communicates, fourth hole (37)；Described 3rd metallic conductor (30), the end of the 4th metallic conductor (31) Face be respectively equipped with threeth blind hole (38) corresponding with described third through-hole (36) and described fourth hole (37) corresponding Four blind holes (39)；Be respectively arranged at two ends with about the upper surface of described 3rd terminal insulative main body (27) the 3rd line pressing bolt hole, Four line pressing bolt holes；The 3rd line pressing bolt (40) being positioned in described 3rd line pressing bolt hole is pushed down and is positioned at described 3rd blind hole (38) external wire in；The 4th line pressing bolt (41) being positioned in described 4th line pressing bolt hole push down be positioned at described 4th blind External wire in hole (39)；

Described first plug includes the first insulating body (61), at least 2 the first contact pins (62), the first circular metal plates (63) and leads Line (68)；The left side of described first insulating body (61) is provided with the 5th chamber, and described first circular metal plate (63) is positioned at described In five chambers, it is suitable with described 5th chamber；The right side of described first insulating body (61) is provided with and described 5th chamber The fifth hole (64) being connected, described wire is fixed through described fifth hole (64) and described first metallic plate and is connected；Described One end of first contact pin (62) is fixing with described first circular metal plate (63) to be connected, and its other end stretches out a left side for described 5th chamber Sidewall；

Described second plug includes the second insulating body (65), at least 2 the second contact pins (66) and the second circular metal plate (67)；Institute The left side stating the second insulating body (65) is provided with the 6th chamber, and described second circular metal plate (67) is placed in described 6th chamber, And it is suitable with described 6th chamber；One end of described second contact pin (66) is fixing with described second circular metal plate (67) to be connected, Its other end stretches out the left side wall of described 6th chamber.