JP2001160352A - Terminal board for primary feeding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a terminal board for primary feeding that can form a primary feeding circuit with a small number of primary electric wire and reduces contact of the primary electric wire with the master bar, even when there are plurality of primary feeding circuits. SOLUTION: This primary feeding terminal board 10 is formed on a pedestal 11, made of an insulator by providing the first conductor 14 equipped with insert pieces 12, 12 to connect a primary terminal 8 to which non-voltage electrodes of facing branch breakers 7a, 7b at the both ends, and with two terminals 13, 13 mounted between the insert pieces 12, 12, the second conductor 15 equipped with the insert piece 12 to connect the primary terminal 8 to which a voltage electrode of one branch breaker 7a at one end, and a terminal 13 at the other end, and the third conductor 16 equipped with an insert piece 12 to connect the primary terminal 8 to which a voltage electrode of the other branch breaker 7b at one end, and a terminal 13 at the other end.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a primary feed terminal block provided at a primary terminal of a branch breaker when a primary feed connection from a primary terminal of a main breaker installed on a distribution board or the like to a branch breaker is made. Related to the structure.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
The single-phase three-wire distribution board 33 composed of one and a plurality of branch breakers 32, 32,... Is usually a voltage pole connected to the secondary terminals 34, 34, 34 of the main breaker 31. R-phase main bar 35 and S-phase main bar 3 which is a non-voltage pole
6 and branch bars 38, 38 branched from the T-phase main bar 37, which is a voltage pole, are connected to primary terminals 39,
39 to supply power to each circuit. But,
When the main breaker 31 that protects the main electric circuit trips, power is not supplied to the branch breaker 32 connected to the secondary terminals 34, 34, 34 of the main breaker 31, so that in an emergency power supply circuit or the like, The primary terminals 3 of the branch breaker 32a to be subjected to the primary feed from the primary terminals 40, 40, 40 of the main breaker 31 for each circuit.
Primary power transmission lines 41, 41 are connected to 9, 39 to supply power.

[0003]

However, since two primary transmission lines are required for one primary transmission circuit, a large number of electric wires must be connected when a plurality of primary transmission circuits are provided. There is a drawback in that it takes time to manufacture the distribution board and the production cost increases. In addition, if the number of primary feed wires increases, the bundle of wires becomes thicker, and the wires come into contact with the main bar, and if the wire coating is scratched for any reason, an accident such as a short circuit may occur. was there.

[0004]

SUMMARY OF THE INVENTION In view of the problems of the above-mentioned conventional primary feed structure, an object of the present invention is to form a primary feed circuit with a small number of primary feed wires even when there are a plurality of primary feed circuits, A primary feed terminal block for reducing contact between a primary feeder wire and a main bar is provided. The structure of the terminal block is provided on both sides of R, S, and T phase main bars arranged side by side inside a distribution board. A primary feed terminal block, which is provided between branch breakers arranged with their side terminals facing each other, and for wiring a primary feed wire to the opposed branch breaker,
An insert for connecting to a primary terminal to which non-voltage poles of branch breakers arranged on both sides of the base are connected to a base formed of an insulator for insulation from the main bars of the S and T phases. Are provided at both ends, a first conductor provided with a terminal portion between the insertion pieces, and an insertion piece for connection to a primary terminal to which a voltage pole of one branch breaker is connected at one end, and a terminal at the other end. A second conductor provided with a portion, and an insertion piece for connecting to a primary terminal to which a voltage pole of the other branch breaker is connected at one end is provided,
That is, a third conductor provided with a terminal portion at the other end is provided.

Further, the first conductor is bent into a crank shape between the insertion piece and the terminal portion to be formed in a convex shape, and an insertion hole is formed in a base substantially immediately below the terminal portion of the first conductor. , And R,
That is, a concave portion for loosely fitting the S-phase main bar provided at a position slightly higher than the T-phase main bar is formed.

Also, the first primary feed terminal block and the second primary feed terminal block are provided side by side and connected using a connection bar.

[0007]

According to the primary feed terminal block of the present invention, the primary terminal is opposed to both sides of the main bar of R, S, T phases arranged in parallel in the distribution board. A primary feed terminal block, which is provided between the branch breakers arranged in the vertical direction and is used to wire the primary feeder wires to the branch breakers facing each other, and is insulated to insulate the main bar of R, S, and T phases. On the base formed by the body, insert pieces are provided at both ends for connecting to the primary terminals to which the non-voltage poles of the branch breakers arranged on both sides of the base are connected, and a terminal section is provided between the insert pieces. A first conductor, an insertion piece for connecting to a primary terminal to which the voltage pole of one branch breaker is connected at one end, a second conductor having a terminal portion at the other end, and another end at one end. Insertion piece for connecting to the primary terminal to which the voltage pole of the branch breaker is connected, and the terminal at the other end By providing the third conductor provided with, the primary feed circuit can be formed with a small number of primary feed wires, so that it can be easily manufactured in a short time and the manufacturing cost can be reduced, Also,
Safety can be improved because the contact between the primary transmission line and the main bar is reduced.

[0008] According to the terminal block for the primary feed according to the second aspect, the first conductor is bent into a crank shape between the insertion piece and the terminal portion to be formed in a convex shape, and the terminal of the first conductor is formed. A through hole is formed in the base substantially immediately below the base, and a recess is formed in the base for loosely fitting the S-phase main bar provided at a position slightly higher than the R and T-phase main bars. Thereby, the main bar of the S phase can be loosely fitted, and the connection work can be easily performed by inserting the primary feed wire into the insertion hole, and the connection bar can be inserted.

According to the primary feed terminal block of the third aspect, the first primary feed terminal block and the second primary feed terminal block are arranged side by side and connected by using the connection bar. The primary feed circuit can be easily added.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a primary feed terminal block according to the present invention will be described with reference to the accompanying drawings of FIGS.

The single-phase three-wire switchboard 1 has a main breaker 2 disposed therein, and the secondary terminals 3, 3, 3 of the main breaker 2.
Are connected, in order from the left, an R-phase main bar 4 which is a voltage pole, an S-phase main bar 5 which is a non-voltage pole, and a T-phase main bar 6 which is a voltage pole. Have been.
The S-phase main bar 5 is provided at a position slightly higher than the R and T-phase main bars 4 and 6. On both sides of the main bars 4, 5, and 6 of the R, S, and T phases, a plurality of branch breakers 7, 7,.
Are arranged side by side with the primary terminals 8, 8 facing each other, and wired by two branch bars 9, 9 branched from the main bars 4, 5, 6 for each branch breaker 7. Here, the branch bars 9, 9 connected to the branch breakers 7a, 7b to be subjected to the primary feeding are obstructed, so that they are cut in advance.

A primary feed terminal block 10 is provided on a base 11 made of an insulator for insulating the main bars 4, 5, and 6 of the R, S, and T phases from a branch breaker opposed to the primary feed. Insert pieces 12, 12 for connecting to the primary terminal 8 to which the non-voltage poles 7a, 7b are connected are provided at both ends.
A first conductor 14 having two terminal portions 13, 13 provided between the first and second terminals 12, 12, and an insertion piece 12 for connecting to a primary terminal 8 to which one end is connected to a voltage pole of one branch breaker 7 a. A second conductor 15 provided with a terminal portion 13 at the other end, and an insertion piece 12 for connection to a primary terminal 8 to which a voltage pole of the other branch breaker 7b is connected at one end. The third conductor 16 provided with the terminal portion 13 is provided. 4, when viewed from the front of the distribution board, the right branch breaker 7a has a non-voltage pole connected to the upper primary terminal 8, a voltage pole connected to the lower primary terminal 8, and a left branch breaker 7a. 7b, a voltage pole is connected to the upper primary terminal 8 and a non-voltage pole is connected to the lower primary terminal 8. The first conductor 14 is bent in a crank shape between the insertion piece 12 and the terminal portion 13 to be formed in a convex shape. And
Each of the terminal portions 13 is provided with a terminal hole 17, and the terminal hole 1 is provided.
7 is provided with a terminal screw 18.

The base 11 has insertion holes 19a, 19b formed directly below the terminal portions 13, 13 of the first conductor 14. In addition, R, T
A recess 20 for loosely fitting the S-phase main bar 5 provided at a position slightly higher than the phase main bars 4 and 6 is formed. Further, a cover 21 is provided on the upper surface between the terminal portions 13 of the first conductor 14.

The method of installing the primary feed terminal block 10 is as follows. First, in a state where the branch breakers 7a and 7b to be subjected to the primary feed are removed, the recesses 20 of the primary feed terminal block 10 are inserted into the S-phase main bar 5. The primary feed terminal block 10 is mounted on the main bars 4, 5, and 6 of the R, S, and T phases so that the terminal block 10 is loosely fitted. Then, the primary terminals 8, 8 of the branch breakers 7a, 7b are inserted into the insertion pieces 12, 12 of the primary feed terminal block 10 so that both sides of the primary feed terminal block 10 are sandwiched between the branch breakers 7a, 7b. This is performed by screwing and fixing with the side terminal screws 22 and 22.

The primary feed terminal block 10 has one non-voltage pole primary feed wire 23a and two voltage pole primary feed wires 2a.
3b and 23c are connected. Non-voltage pole primary transmission line 2
One end of 3a is a primary terminal 24a at the center of the main breaker 2.
The other end is screwed and fixed to a terminal hole 17 of a terminal portion 13 at the upper right of the first conductor 14 of the primary feed terminal block 10 by a terminal screw 18. One end of the primary transmission line 23b of the voltage pole is connected to the primary terminal 24b on the right side of the main breaker 2, and the other end is screwed into the terminal hole 17 of the terminal portion 13 of the second conductor 15 of the terminal block 10 for primary transmission. 18 respectively. In addition, another primary voltage transmission line 23
c is connected to the primary terminal 24c on the left side of the main breaker 2, and the other end is connected to the third conductor 1 of the primary feed terminal block 10.
5 are respectively screwed and fixed to terminal holes 17 of the terminal portions 13 by terminal screws 18. At this time, the terminal portion 13 of the second conductor 15
Is difficult to connect with the primary transmission wire 23b, but the insertion hole 19a
The connection can be easily performed by inserting the primary transmission wire 23b through the wire.

When there are a plurality of primary feed circuits, the primary feed terminal blocks 10 are arranged on the lower side in accordance with the number of primary feed circuits, and the primary feed terminal blocks 10, 10 are connected to each other. Three connection bars 25a, 25b, 25c are used for connection between the primary feed terminal blocks 10, 10, and screws for inserting terminal screws 18 near both ends of each of the connection bars 25a, 25b, 25c. Insertion holes 26, 26 are formed.

The second conductor 15 of the first primary feed terminal block 10a and the second conductor 1 of the second primary feed terminal block 10b
5 is formed in a substantially flat plate shape, the connection bar 25b is inserted into the insertion hole 19a of the second primary feed terminal block 10b, and the screw insertion hole 2 at one end of the connection bar 25b is inserted.
6 is fixed to the terminal portion 17 of the terminal portion 13 of the second conductor 15 of the first primary feed terminal block 10a by screwing with the terminal screw 18, and the screw insertion hole 26 at the other end is inserted into the second primary feed terminal block 10a. A terminal screw 18 is screwed in and fixed to the terminal hole 17 of the terminal portion 13 of the second conductor 15 of the feed terminal block 10b.

The third conductor 16 of the first primary feed terminal block 10a and the third conductor 1 of the second primary feed terminal block 10b
6, the connection bar 25c is formed in a substantially flat plate shape similarly to the connection bar 25b, and the connection bar 25b is inserted into the insertion hole 19b of the first primary feed terminal block 10a.
c into the first primary feed terminal block 1
The terminal hole 17 of the terminal portion 13 of the third conductor 16a is fixed by screwing with a terminal screw 18, and the screw insertion hole 26 at the other end is connected to the third conductor of the second primary feed terminal block 10b. 1
6 and the terminal screw 18 in the terminal portion 13
To fix it.

The first conductor 14 of the first primary feed terminal block 10a and the first conductor 1 of the second primary feed terminal block 10b
4 is connected to the first primary feed terminal block 10a so that the terminal screw 17 can be attached to and detached from the terminal section 13.
The terminal portion 13 of the second conductor 15 and the terminal portion 13 of the third conductor 16 of the second primary feed terminal block 10b are formed in a crank shape so as not to be blocked, and a screw insertion of one end of the connection bar 25a is performed. The hole 26 is aligned with the terminal hole 17 of the lower left terminal portion 13 of the first conductor 14 of the first primary feed terminal block 10a and screwed and fixed with the terminal screw 18, and the other end of the screw insertion hole 26 is A terminal screw 18 is screwed in and fixed to the terminal hole 17 of the terminal portion 13 at the upper right of the first conductor 14 of the second primary feed terminal block 10b.

In this way, the primary feed terminal blocks can be easily connected, and a branch breaker is connected to the connected primary feed terminal blocks in the same procedure.

[0021]

As described above, the primary feed terminal block according to the present invention is arranged such that the primary terminals are opposed to both sides of the R, S, T phase main bars arranged in parallel in the distribution board. A primary feed terminal block provided between the provided branch breakers, for wiring the primary feed wire to the opposed branch breaker,
For connecting to a primary terminal to which non-voltage poles of branch breakers arranged on both sides of the base are connected, to a base formed of an insulator for insulation from the main bars of the R, S and T phases. A first conductor provided with an insertion piece at both ends, a terminal portion provided between the insertion pieces, and an insertion piece for connection to a primary terminal to which a voltage pole of one branch breaker is connected at one end, and an other end provided A second conductor provided with a terminal portion, a third conductor provided with an insertion piece at one end for connection to a primary terminal to which a voltage pole of the other branch breaker is connected, and a terminal portion provided at the other end. With this arrangement, the primary feed circuit can be formed with a small number of primary feed wires, so that it can be easily manufactured in a short time and the manufacturing cost can be reduced. Can increase safety due to reduced contact with the bar Those having an excellent effect that.

Further, the first conductor is bent in a crank shape between the insertion piece and the terminal portion to be formed in a convex shape, and an insertion hole is formed in a base substantially directly below the terminal portion of the first conductor. , And R,
By forming a recess for loosely fitting the S-phase main bar provided at a position slightly higher than the T-phase main bar,
The main bar of the phase can be loosely fitted, and the connection work can be easily performed by inserting the primary feed wire into the insertion hole.
There is an effect that the connection bar can be inserted.

In addition, the first primary feed terminal block and the second primary feed terminal block are juxtaposed and connected using the connection bar, so that the primary feed circuit can be easily added. There is.

[Brief description of the drawings]

FIG. 1 is a front view showing a distribution board provided with a primary feed terminal block according to the present invention.

FIG. 2 shows a primary feed terminal block according to the present invention;
Is a front view, (b) is a plan view, and (c) is a side view.

FIG. 3 is a perspective view showing a method for installing a primary feed terminal block according to the present invention.

FIG. 4 is a front view showing a method of installing a primary feed terminal block according to the present invention.

FIG. 5 is a front view showing a method of connecting a primary feed terminal block according to the present invention.

FIG. 6 is a front view showing a conventional primary feeding method.

[Explanation of symbols]

 Reference Signs List 4 R-phase main bar 5 S-phase main bar 6 T-phase main bar 7 Branch breaker 8 Primary terminal 10 Primary feed terminal block 11 Base 12 Insert 13 Terminal section 14 First conductor 15 Second conductor Reference Signs List 16 Third conductor 17 Terminal hole 18 Terminal screw 19a Insertion hole 19b Insertion hole 20 Depression 21 Cover 23a Primary feeder of non-voltage pole 23b Primary feeder of voltage pole 23c Primary feeder of voltage pole 25a Connection bar 25b Connection bar 25c Connection bar

Claims (3)

[Claims] An R, S, and T phase main bar arranged in parallel in a distribution board is provided between branch breakers provided with primary terminals opposed to both sides thereof, and the opposed branch is provided. A primary feed terminal block for wiring a primary feed wire to a breaker, which is provided on a base formed of an insulator to insulate the main bars of the R, S, and T phases from each other on both sides of the base. An insertion piece for connecting to a primary terminal to which a non-voltage pole of the provided branch breaker is connected is provided at both ends, a first conductor provided with a terminal portion between the insertion pieces, and one end at one end. An insert is provided for connection to a primary terminal to which a voltage pole of a branch breaker is connected, and a second conductor having a terminal portion provided at the other end, and a voltage pole of the other branch breaker is connected at one end. An insertion piece for connecting to the primary terminal is provided, and a third conductor having a terminal at the other end is provided. A terminal block for primary feed, characterized in that it is radiated. 2. The base according to claim 1, wherein said first conductor is bent in a crank shape between said insertion piece and said terminal portion to form a convex shape, and said base is substantially directly below said terminal portion of said first conductor. And a recess for loosely fitting the S-phase main bar provided at a position slightly higher than the R- and T-phase main bars on the base. The terminal block for primary feeding according to claim 1. 3. The primary according to claim 1, wherein the first primary feed terminal block and the second primary feed terminal block are arranged side by side and connected using a connection bar. Feed terminal block.