JPH04295208A - Distribution board - Google Patents

Abstract

PURPOSE:To provide a distribution board employing 1P type branch breakers mounting a terminal block for facilitating connection of branch circuits. CONSTITUTION:In the distribution board 1, a main breaker 2 is arranged in upper center while a neutral conducting bar 3 to be connected with the neutral of single phase three-wire system switched through the main breaker 2 and two other conducting bars 4, 4 are arranged below the main breaker 2. The neutral conducting bar 3A is jointed, at the lower end thereof, to a neutral conducting bar 3A arranged laterally at the lower part of the distribution board 1 and the neutral conducting bar 3A is jointed, at the opposite ends, to the lower ends of neutral conducting bars 3B, 3B arranged on the load terminal 6 side of branch breakers 5.... Terminal blocks 10 are juxtaposed to respective branch breakers 5 on the load terminal 6 side. The terminal block 10 fastens the terminal metal of input connecting terminal 11 located at an end part to the load terminal 6 of branch breaker 5 with the neutral conducting bar 3B being passed through thus connecting the terminal metal of the input connecting terminal 11 with one load connecting terminal 9 on the load side through internal circuit. The terminal block 10 passes the neutral conducting bar 3B through the housing 12 and connects, with the load terminal 9 through the internal circuit.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a distribution board using a terminal device for multifunctionality.

0002

[Prior Art] Conventionally, in a single-phase three-wire distribution board, a main breaker is placed in the center of the upper part, and a conductive bar for the neutral line is connected to the neutral line of the main line, which is opened and closed by the main breaker. Normally, it is arranged in the center of the distribution panel along with the other two conductive bars, facing downward from the main circuit breaker, and branch circuit breakers are arranged on both sides of this main circuit.

However, when a 1P type breaker is used as a branch breaker, the 1st wire (L phase) of a single-phase 2-wire branch circuit is
Connect the power terminal of the branch breaker to the conductive bar of the main line, take it out from the load terminal of the branch breaker, and connect the other line (N phase) to the conductive bar for the neutral line at a location away from the installation location of the branch breaker. It was usual to take out the wire through a so-called neutral switch, which constitutes a neutral line connection switch means that can be connected and disconnected at will.

0004

[Problem to be solved by the invention] Therefore, when installing a function such as circuit monitoring in a branch breaker or connecting a branch circuit, the wiring from the conductive bar for the neutral wire becomes very complicated, and the wiring inside the distribution board becomes very complicated. There was a problem that wiring work was complicated.

The present invention has been made in view of the above-mentioned problems, and an object of the invention as claimed in claim 1 is to provide a branch circuit in a distribution board using a 1P type branch breaker. To provide a distribution board equipped with a terminal device that allows easy connection. In addition to the object of the invention set forth in claim 1, the object of the invention set forth in claim 2 is to provide a distribution board in which a terminal device can be easily connected to a conductive bar for a neutral wire.

Furthermore, the object of the invention as claimed in claim 3 is that in addition to the object of the invention as claimed in claim 1, the terminal device is equipped with a circuit monitoring means to add a function to the 1P type branch breaker. It is to provide the electric board. A further object of the invention set forth in claim 4 is to provide a distribution board that achieves both the objects of the inventions set forth in claims 2 and 3.

In addition to the object of the invention set forth in claim 5, the object of the invention is to provide a terminal device corresponding to a 1P type branch breaker which is closely arranged. We provide a distribution board that can be installed. In addition to the object of the invention set forth in claim 1, 2, 3, or 4, the object of the invention set forth in claim 6 is to provide a power distribution unit that can connect a terminal device to a plurality of branch breakers at once. We will provide the disc.

[0008] In addition to the object of the invention as claimed in claim 1, 2, 3 or 4, the object of the invention as claimed in claim 7 is to provide a power distribution system that prevents the connection between the branch breaker and the terminal device from falling off. We will provide the disc. In addition to the object of the invention set forth in claim 2 or 4, the object of the invention set forth in claim 8 is to provide a power distribution device that can be easily connected to and disconnected from a conductive bar for a neutral line by operating a handle. We will provide the disc.

[0009]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the invention according to claim 1 provides a conductive bar for a neutral line on the load terminal side of a 1P type branch breaker. One of the pair of input connection terminals is connected to the conductive bar for the load, and the other is connected to the load terminal of the branch breaker, and a terminal device with a pair of load connection terminals is installed on the load terminal side of the branch breaker. This is what I did.

[0010] The invention according to claim 2 provides the above terminal device with:
It is equipped with a neutral line connection switch means that enables the circuit on the neutral line conductive bar side to be opened and closed. According to a third aspect of the invention, the terminal device is provided with electric path monitoring means such as leakage detection, voltage detection, current detection, or power detection. Claim 4
The invention described above includes, in the terminal device, a neutral wire connection switch means for opening and closing a circuit on the neutral conductive bar side, and a circuit monitoring means such as earth leakage detection, voltage detection, current detection, or power detection. It is something that

[0011] According to the fifth aspect of the invention, the width of the terminal device is approximately equal to or less than the width of the branch breaker. According to a sixth aspect of the invention, terminal devices are integrated into one block for a plurality of branch breakers. According to a seventh aspect of the invention, the terminal device is provided with an opening that penetrates the neutral conductive bar.

The invention as set forth in claim 8 uses a neutral wire connection switch means provided with a contact that can be connected to and disconnected from a conductive bar for a neutral wire by operating a handle.

[0013]

[Operation] According to the invention as claimed in claim 1, a conductive bar for the neutral line is provided on the load terminal side of the 1P type branch breaker, and a pair of input connection terminals are provided on the conductive bar for the neutral line. A terminal device with a pair of load connection terminals is installed on the load terminal side of the branch breaker, and the other is connected to the load terminal of the branch breaker. Branch circuits can be connected simply by connecting to a pair of load connection terminals on the terminal device, eliminating the need for wiring from the neutral line and making wiring work within the distribution board less complicated.

According to the second aspect of the invention, the terminal device is provided with a neutral line connection switch means for opening and closing the circuit on the neutral line conductive bar side. The means can easily connect the terminal device to one input connection terminal. Furthermore, according to the invention as set forth in claim 3, since the terminal device is equipped with electric line monitoring means such as earth leakage detection, voltage detection, current detection, or power detection, the function of electric line monitoring of the branch circuit is performed by a branch breaker. can be easily added to.

Furthermore, according to the invention as set forth in claim 4, the terminal device includes a neutral line connection switch means for opening and closing the circuit on the neutral line conductive bar side, and earth leakage detection, voltage detection, and current detection. Or, since it is equipped with electrical circuit monitoring means such as power detection, it is possible to easily connect the conductive bar for the neutral wire to one input connection terminal of the terminal device using the neutral wire connection switch means, and the electrical circuit of the branch circuit can be easily connected to one input connection terminal of the terminal device. Monitoring functions can be easily added to branch breakers.

According to the fifth aspect of the invention, since the width of the terminal device is approximately equal to or less than the width of the branch breaker, it is possible to arrange the terminal device in correspondence with the branch breakers that are closely arranged. can. According to the invention as set forth in claim 6, since the terminal device is made into one block for a plurality of branch breakers, one terminal device can correspond to a plurality of branch breakers.

[0017] According to the seventh aspect of the invention, since the terminal device is provided with an opening that penetrates the conductive bar for the neutral wire, it is possible to prevent disconnection between the terminal fitting of the terminal device and the load terminal of the branch breaker. It becomes a stop. The invention according to claim 8 uses a neutral line connection switch means equipped with a contact that connects and disconnects the neutral line conductive bar by operating a handle. Connection release operation becomes easier.

[0018]

[Examples] The present invention will be explained below with reference to Examples. FIG. 1 shows an embodiment of the distribution board of the present invention, in which a master breaker 2 is arranged at the center of the upper part of the bottom of the distribution board 1, and a single-phase three-wire neutral line ( A conductive bar 3 for the neutral wire connected to N) and conductive bars 4, 4 for the other two wires (L1, L2) are arranged facing downward of the main breaker 2, and branched on both sides of this main path. Circuit branch breakers 5... are arranged.

The conductive bar 3 for the neutral wire connects its lower end to the distribution board 1
The neutral wire is connected to the conductive bar 3A for the neutral wire arranged laterally at the bottom of the neutral wire, and furthermore, at both ends of the conductive bar 3A for the neutral wire, the neutral wire is arranged on the load terminal 6 side of the branch breaker 5. The lower ends of the conductive bars 3B and 3B are connected to each other. Each conductive bar 4, 4 is connected to a power terminal 7 of a branch breaker 5 by a connecting bar 8.

Terminal devices 10 are arranged in parallel on the load terminal 6 side of each branch breaker 5, and as shown in FIG. The terminal fitting of the input connection terminal 11 provided at the end is fastened and fixed to the load terminal 6 of the branch breaker 5. As shown in FIG. 2, the terminal device 10 has the input connection terminal 11 protruding from one end surface of a casing 12 formed to have approximately the same width as the branch breaker 5, and a casing below the input connection terminal 11. A conductive bar penetration cutout 13 for the neutral wire is provided on both side surfaces and one end surface of the body 12, and as shown in FIG. When the wire conductive bar 3B is penetrated as shown in FIG. 4, one end surface of the housing 12 will be opposed to one end surface of the branch breaker 5, and in this state, the recess of the input connection terminal 11 will be inserted as shown in FIG. The notch 11a is the terminal screw 6a of the load terminal 6.
The input connection terminal 11 can be connected to the load terminal 6 by simply fitting the input connection terminal 11 into the load terminal 6 and fastening the terminal screw 6a.

Further, on the upper surface of the stepped portion 12a formed on the other end side of the housing 12 of the terminal device 10, there are wire insertion holes 14, 14 for the load connection terminals 9, 9, which are quick-connect terminals built into the housing 12.
and an opening 1 for operating the release button 15 to release the connection state.
6 is open, and on one side of the upper surface of the housing 12 there is an operation handle 17 for a so-called neutral switch SW that connects and disconnects from the conductive bar 3B for the neutral line, and on the other side there is a built-in earth leakage detection device. A mechanical earth leakage detection indicator lamp L, a test button 18, and a reset button 19 are exposed.

FIG. 6 shows the electrical circuit of the earth leakage detection mechanism built into the terminal device 10 and the neutral switch, as well as the connection relationship with the branch breaker 5. Current transformer ZCT and a function to amplify the secondary output of this zero-phase current transformer ZCT and perform signal processing to keep the above-mentioned earth leakage detection indicator lamp L lit, and to detect a pseudo earth leakage state when the test button 18 is operated. It consists of a signal processing circuit unit 20 that has a function to generate a signal and check whether the above signal processing function operates normally, and a function to reset the earth leakage detection display state by operating the reset button 19. The primary winding of the current transformer ZCT is connected to the neutral conductive bar 3B with the neutral switch SW as one of the input connection terminals, and one of the load connection terminals 9
The line 19 is connected between the input connection terminal 11 and the other load connection terminal 9, and the power supply for the signal processing circuit section 20 is connected to the line 19.
It is designed to be taken from 9 and 19.

These circuit elements of the earth leakage detection mechanism are mounted on a single printed circuit board 22 as shown in FIG.
stored inside. The neutral switch SW is shown in Figure 8.
As shown in FIG. 9, by operating the operating handle 17, the contactor 23 can be brought into contact with the upper surface of the neutral wire conductive bar 3B and separated from it. A lever portion 17a protruding from the window hole 24 of the housing 12, and a cam portion 17b continuous with the lever portion 17a.
A shaft 25 is formed at the joint portion of the lever portion 17a and the cam portion 17b, and this shaft 23 is formed on the inner wall surface of the housing 12 to receive a bearing (see FIG. (not shown), with the lever portion 17a protruding from the upper surface of the housing 12 as shown in FIG.
4, it can be undulated between a state where it falls down along the top surface of the casing 12 and a state where it falls down along the top surface of the casing 12.

The contactor 23 is formed into a substantially rectangular shape in which an operation piece 23a and a contact piece 21b that contacts and releases the neutral line conductive bar 3B are continuous, and the vicinity of the bending point is rotatably connected to the housing. It is pivoted within the body 12 and biased toward the neutral wire conductive bar 3B by a contact pressure spring 30 mounted between it and the inner surface of the casing 12. Therefore, as shown in FIG. 9, when the cam portion 17a of the operating handle 17 is not pressed against the operating piece 23a, the spring force of the contact pressure spring 30 causes the contact piece 23 to
The tip of b comes into contact with the neutral wire conductive bar 3B, and the operation piece 2
3a is pressed by the cam portion 15a of the operating handle 17, the contact piece 23b separates from the neutral conductive bar 3B as shown in FIG. In this way, the operating handle 17
By raising and lowering the lever portion 17b, the neutral wire conductive bar 3B
A switch mechanism section that opens and closes is constructed.

The load connection terminal 9 is a terminal fitting 9 having a U-shaped cross section.
a, and a locking spring 9b having a substantially square shape housed in the terminal fitting 9a, and a single wire conductor inserted through the wire insertion hole is inserted between the locking spring 9b and the terminal fitting 9a. When the release button 15 is pressed from the operation opening 16 with a jig such as a screwdriver, the locked state is released and the wire conductor is connected. It is now possible to pull it out.

According to this embodiment, the terminal device 10 is attached to the branch breaker 5 as shown in FIG. 5, and the electric wires from the branch circuit are connected to the load connection terminals 9, 9 of the terminal device 10. This completes the wiring connection of the branch circuit, and also adds a function similar to that provided to the branch breaker 5 with an earth leakage detection function. The above-mentioned terminal device 10 is provided one for each branch breaker 5, but since a plurality of branch breakers 5 are usually arranged in parallel in the distribution board 1, the terminal device 10 for a plurality of branch breakers 5 is provided. It may be formed integrally into a block.

Furthermore, in the above-mentioned terminal device 10, the connection of the terminal device 10 to the conductive bar 3B for the neutral line is performed by the notch 13 provided on the end face of the housing 12, but as shown in FIG. You may do so. In this case, the state in which the input connection terminal 11 is connected to the load terminal 13 of the branch breaker 5 is maintained, and even if the screw terminal 6a becomes loose, the terminal device 10 can be prevented from falling off.

Furthermore, in the above embodiment, the earth leakage detection indication is performed by the earth leakage detection indicator lamp L provided in each terminal device 10, but the secondary output of the zero-phase current transformer ZCT of each terminal device 10 is derived respectively. Then, as shown in FIG. 11, they may be displayed all at once on a separately provided display unit 28. In this case, the display unit 28 is provided with a signal terminal T1 for connecting the secondary output from each terminal device 10, and a changeover switch S, so that by switching the changeover switch S, a changeover display can be performed using the earth leakage detection indicator lamp L. I have to.

In the above embodiment, the neutral switch SW is built into the terminal device 10, but a separate neutral switch is connected to the neutral conductor bar 3B.
The electric wire from this neutral switch may be connected inside using an input connection terminal consisting of a quick connection terminal provided with a wire insertion hole 27 provided on the upper surface of the housing 12, as shown in FIG. This embodiment is used for the circuit configuration shown in FIG.

In the above embodiment, the earth leakage detection mechanism is built into the terminal device 10, but other circuit monitoring mechanisms such as a voltage detection mechanism, a current detection mechanism, and a power detection mechanism may also be built in. good.

[0031]

[Effects of the Invention] The invention as claimed in claim 1 is characterized in that a conductive bar for a neutral line is disposed on the load terminal side of a 1P type branch breaker, and one of a pair of input connection terminals is connected to the conductive bar for a neutral line. and connect the other end to the load terminal of the branch breaker.
Since a terminal device with a pair of load connection terminals on the load side is equipped on the load terminal side of the branch breaker, the branch circuit can be connected by simply connecting the branch circuit to the pair of load connection terminals on the terminal device. This has the effect of eliminating the need for wiring from the neutral line and making the wiring work within the distribution board less complicated.

[0032] Furthermore, in the invention as set forth in claim 2, since the terminal device is provided with a neutral line connection switch means for opening and closing the circuit on the side of the conductive bar for the neutral line, the neutral line connection switch means This has the effect that connection to one input connection terminal of the terminal device can be easily made. Furthermore, the invention as claimed in claim 3 is such that the terminal device is equipped with electric line monitoring means such as earth leakage detection, voltage detection, current detection, or power detection, so that the function of electric line monitoring of a branch circuit can be easily implemented in a branch breaker. This has the effect that it can be added to.

[0033] Furthermore, claim 4 provides that the terminal device includes:
Since it is equipped with a neutral line connection switch means that enables the circuit on the neutral line conductive bar side to be opened and closed, and an electric circuit monitoring means such as earth leakage detection, voltage detection, current detection, or power detection, the neutral line connection is The switch means can easily connect one input connection terminal of the terminal device, and the function of monitoring the branch circuit can be easily added to the branch breaker.

According to the fifth aspect of the invention, since the width of the terminal device is approximately equal to or smaller than the width of the branch breaker, the terminal device can be arranged in correspondence with the branch breakers that are closely arranged. There is an effect. Claim 6
Since the described invention is one in which the terminal devices are arranged in one block for a plurality of branch breakers, there is an advantage that a single arrangement can correspond to a plurality of branch breakers.

According to the seventh aspect of the invention, since the terminal device is provided with an opening that penetrates the conductive bar for the neutral line, the connection between the terminal device and the branch breaker by the terminal fitting is prevented from coming off. effective. The invention according to claim 8 is:
Since it uses a neutral line connection switch means equipped with a contact that connects and disconnects the neutral line conductive bar by operating the handle, it is easy to connect and disconnect the neutral line conductive bar. There is an effect.

[Brief explanation of drawings]

FIG. 1 is a reduced front view showing an open state of the door of a distribution board according to an embodiment of the present invention.

FIG. 2 is a perspective view of a terminal device of a distribution board according to an embodiment of the present invention.

FIG. 3 is a partially omitted perspective view of a load terminal portion of a branch breaker according to an embodiment of the present invention.

FIG. 4 is a perspective view showing a coupled state of a branch breaker and a terminal device according to an embodiment of the present invention.

FIG. 5 is a top view showing a coupled state of a branch breaker and a terminal device according to an embodiment of the present invention.

FIG. 6 is an electrical circuit diagram of an embodiment of the present invention.

FIG. 7 is a sectional view showing a coupled state of a branch breaker and a terminal device according to an embodiment of the present invention.

FIG. 8 is a sectional view for explaining the operation of a neutral switch according to an embodiment of the present invention.

FIG. 9 is a sectional view for explaining the operation of a neutral switch according to an embodiment of the present invention.

FIG. 10 is a perspective view showing a coupled state of a branch breaker and a terminal device according to another embodiment of the present invention.

FIG. 11 is an electrical circuit diagram of another embodiment of the present invention.

FIG. 12 is an exploded perspective view showing a coupled state of a branch breaker and a terminal device according to another embodiment of the present invention.

[Explanation of symbols]

1　　　　　　　　　　　Power distribution board 2 Main breaker 3B Conductive bar for neutral line 5 Branch breaker 6 Load terminal 7 Power supply terminal 9 Load connection terminal 10 Terminal device 11 Input connection terminal

Claims (8)

[Claims] Claim 1: A conductive bar for a neutral line is provided on the load terminal side of a 1P type branch breaker, one of a pair of input connection terminals is connected to the conductive bar for the neutral line, and the other is connected to the branch breaker. A distribution board characterized in that the load terminal side of the branch breaker is equipped with a terminal device that is connected to the load terminal of the branch breaker and has a pair of load connection terminals on the load side. 2. The distribution board according to claim 1, wherein the terminal device includes neutral line connection switch means for opening and closing a circuit on the neutral line conductive bar side. 3. The distribution board according to claim 1, wherein the terminal device is provided with electric circuit monitoring means such as earth leakage detection, voltage detection, current detection, or power detection. 4. The terminal device is provided with a neutral line connection switch means for opening and closing a circuit on the neutral line conductive bar side, and an electric line monitoring means such as earth leakage detection, voltage detection, current detection or power detection. The distribution board according to claim 1, characterized in that: 5. The distribution board according to claim 1, wherein the width of the terminal device is approximately equal to or less than the width of the branch breaker. Claim 6: One terminal device for multiple branch breakers.
Claim 1, 2 or 3 characterized in that the block is formed.
Or the distribution board described in 4. 7. The distribution board according to claim 1, wherein the terminal device is provided with an opening that penetrates the conductive bar for the neutral wire. 8. The distribution board according to claim 2 or 4, characterized in that a neutral line connection switch means is used which is equipped with a contact that connects and disconnects the neutral line conductive bar by operating a handle. .