JP3413070B2 - Arrester for distribution board - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an arrester for a distribution board, and more specifically, it is attached to a distribution board for a house installed in a general household or the like and absorbs a lightning surge entering from a low voltage power line. , For the distribution panel arrester that protects electrical equipment used in the home.

[0002]

2. Description of the Related Art Generally, a low voltage power supply (AC100V, 20V
The lightning surge entering from 0V is absorbed by an arrester (lightning arrester) to prevent the intrusion before it protects electric devices used at home. Also,
For residential distribution boards installed in general households,
In recent years, it has been desired to attach the above-mentioned arrester.

By the way, in recent years, most of the power supply lines drawn into general households are single-phase three-wire type capable of supporting 200 V. As shown in FIG. 7, the neutral line N and its outer lines L1 and L are connected.
In order to absorb the lightning surge between each line of No. 2, the neutral line N, the outer lines L1 and L2, and the ground, six lightning arresters A1 to A6 are used.
Need. Therefore, these six lightning arresters A1 to
The arrester incorporating A6 is attached to the distribution board for the house.

[0004]

However, when the arrester incorporating the six lightning arresters A1 to A6 is attached to the distribution board as described above, the six lightning arresters A1 are used.
Since the arrester becomes large when it is attempted to store ~ A6 in the case, it is unavoidable to install the arrester outside the distribution board in a general household. In this way, the six lightning arresters A1 to A
When an arrester that stores 6 in an exclusive case is externally attached to the distribution board, the location where the arrester is installed often poses a problem, and even if the arrester can be installed, it is often not aesthetically pleasing. .

Further, the shape of the arrester is small, and the shape thereof is easy to mount, such as a composite type arrester,
Some have taken the design into consideration, but after all, it was necessary to install the lightning protection device in a dedicated case on a wall or the like separately from the distribution board, which required a certain installation space.

Further, there is a means for miniaturizing the arrester and storing it inside the distribution board, but in this case, a storage space for the arrester is necessary in addition to the storage space for the earth leakage breaker and the safety breaker in the distribution board. Therefore, the problem of increasing the size of the distribution board arises accordingly.

Therefore, the present invention has been proposed in view of the above problems, and an object of the present invention is to store the inside of an existing distribution board and to enlarge the distribution board. The purpose of this is to provide an arrester for a distribution board that is prevented.

[0008]

[0009]

[0010]

[Means for Solving the Problems] To achieve the above object
As a technical means of the present invention, the present invention provides a neutral wire N and an outer wire L.
Provided inside a single-phase 3-wire type distribution board consisting of 1, L2
Of the multiple safety breaker mounting parts, for expansion
Disposed on one of the two safety breaker mounting site of idle provided, substantially the same shape as the safety breaker
In addition to having the arrester body of the
Opened window for breaker switch of all breakers
The operation lamp is exposed to the upper surface of the arrester body.
Is an arrester for a distribution board arranged in
Two inter-line lightning arresting elements respectively connected between the outer lines L1 and L2 and two display elements connected in parallel therewith,
A neutral wire N in which the two line arresters are commonly connected to each other, and a ground-to-ground lightning arrester connected to the ground, and each line-to-line lightning arrestor.
It is characterized in that the circuit is constituted by four separating elements arranged on the outer lines L1 and L2 sides of the child, the neutral line N side, and the ground side.
To do.

The present invention also provides a neutral wire N and an outer wire L.
Installed inside a single-phase 3-wire distribution panel consisting of 1, L2
Of the multiple safety breaker mounting parts, for expansion
Disposed on both of the two safety breaker mounting site provided the free state, substantially the same shape as the safety breaker Ares
It has a main body and a safety breaker on the front of the distribution board.
Exposed on the window opened for the breaker switch of the mosquito
Arrange the operation lamp on the upper surface of the arrester body so that
A distribution board arrester, wherein the neutral wire N and the outer wire L
One line arrester connected between 1 or L2 , one display element connected in parallel with the line arrester , and the line arrester
And two ground between lightning protection elements connected respectively between the neutral line N and the outer line L1 or L2 are connected to ground, between the lines
Outer lines L1 or L2 side of lightning protection device, the neutral line N side, that it has the circuit composed of the four disconnect element disposed on the ground side <br/>
Characterize.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of an arrester for a distribution board according to the present invention will be described in detail below.

The distribution panel arrester of this embodiment is shown in FIG.
As shown in (a) and (b), it is a compact one that is connected to a single-phase three-wire power supply line that is drawn into a general household and is stored inside the distribution board 1 attached to the wall of the house. is there.

Here, the single-phase three-wire type distribution board 1 is generally composed of a base 2 which is attached to a wall surface of a house by screwing or the like, and a cover 3 which is detachably covered by the base 2. It is provided with a plastic housing 4.

Inside the housing 4, a neutral wire N and an outer wire L are provided.
An earth leakage breaker 5 to which a single-phase three-wire power supply line composed of 1, L2 is connected, and copper strip-shaped terminal metal fittings 6 (N), 7 (L2), 8 (L1) extending from the earth leakage breaker 5
And a plurality of safety breaker mounting portions P11 to P1 located on both sides of the terminal fittings 7 (L2) and 8 (L1).
3, the terminal fittings 6 to 8 arranged on P21 to P23
And safety breakers 9 and 10 attached by screwing or the like in a state of being electrically connected to.

A plurality of safety breakers 9 and 10 distributed from the above-mentioned earth leakage breaker 5 to both upper and lower sides (L2 and L1 sides) via terminal fittings 6 to 8 are composed of a neutral wire N and an outer wire L.
2, L1, that is, between N-L2 (AC100V) and N-
It is arranged so as to be balanced quantitatively and rated ampere between L1 (AC100V).

Further, normally, safety breaker mounting portions P11 to P13, which are distributed on both sides of the terminal fittings 7 and 8,
The safety breakers 9 and 10 are rarely attached to all of P21 to P23, and rather, it is recommended that the safety breaker attachment portions P13 and P23 in the empty state be provided for expansion. As described above, the safety breaker mounting portions P13 and P23 for this extension are also NL as described above.
In consideration of the balance between the two and the N-L1, it is desirable to secure one upper and one lower empty space, for example.

The distribution board arrester 11 of the present invention is attached to the safety breaker mounting portions P13 and P23 in an empty state, which are provided for expansion in the existing distribution board 1. still,
In this embodiment, one distribution board arrester 1 is provided at the safety breaker mounting portion P13 on the terminal metal fitting 7 (L2) side.
In addition to this, it is possible to dispose a distribution board arrester at the safety breaker mounting portion P23 on the side of the terminal fitting 8 (L1), in which case the polarity is reversed. The distribution board arrester described above is attached in a state upside down from the distribution board arrester 11 described above.

The distribution board arrester 11 has an arrester body having substantially the same shape as the safety breakers 9 and 10 so that it is disposed at the safety breaker mounting portion P13.
Two operation lamps 12, 13 are provided on the upper surface of the arrester body.
And terminal terminals 14 (L2), 15 (N), 16 (L1), 17 at the four corners of the arrester body.
(E) is provided.

The internal circuit configuration of the distribution panel arrester 11 is as shown in the equivalent circuit of FIG. That is, the lightning protection element 18 between lines is connected between the terminal terminals 14 (L2) and 15 (N), and the disconnection elements 24 and 23 are provided on the terminal terminals 14 (L2) and 15 (N) side. Element 1
A resistor 21 and a display element (operation lamp) 12 are connected in parallel with 8. Similarly to this, the terminal terminal 16 (L1)
And 15 (N), the line arrester 19 is connected, and the disconnection element 25 is provided on the terminal terminal 16 (L1) side.
The resistor 22 and the display element 13 are connected in parallel with the above-mentioned inter-line lightning protection element 19. In addition, the two line arresters 18, 19
The disconnection element 26 and the ground-to-ground lightning protection element 20 are connected between the common connection point and the terminal terminal 17 (E).

As a concrete circuit configuration, as shown in FIG. 3, lightning protection devices 18 to 20 called zinc oxide devices are used, and terminal terminals 14 (L2), 15 (N) and 16 (L1) are used.
A glass tube fuse is used as the disconnecting elements 23 to 25 arranged on the side, and a thermal fuse is used as the disconnecting element 26 arranged on the terminal terminal 17 (E) side. Light emitting diodes are used as the display elements 12 and 13, and protective diodes 27 and 28 are connected between the resistors 21 and 22.

The arrester 11 for the distribution board having the circuit configuration as described above is provided with the safety breaker mounting portion P13 of the distribution board 1.
When installing on the terminal terminal 14 (L
2), 15 (N) to the terminal fittings 7 (L2), 6
The terminals (L) are connected to (N) by screws or the like, and the terminal terminals 16 (L1) are connected to the terminal fittings 8 (L1) located on the opposite side via the lead wires 29. still,
For terminal terminal 17 (E), residential distribution board 1
Is usually not grounded, but if it is grounded, its terminal terminal 17 (E)
Is connected to the ground portion of the distribution board 1. After mounting the arrester 11 for the distribution board, by covering the cover 3, the operation lamps 12 and 13 are exposed from the window portion 50 opened for the breaker switch 49 of the safety breakers 9 and 10 (see FIG. 1B). ].

In the distribution panel arrester 11, the operating lamp 12 of the light emitting diode, when operating normally,
13 lights up. That is, if the space between the terminal terminals 14 (L2) and 15 (N) is normal, the operation lamp 12 lights up,
If the space between the terminal terminals 16 (L1) and 15 (N) is normal, the operation lamp 13 lights up.

Here, from the power line to the terminal 14
When a lightning surge enters through (L2) and 16 (L1), the lightning surge is absorbed by the line-to-line lightning arresters 18 and 19 and is transferred from the terminal terminal 15 (N) to the two-type ground via the pole transformer. Flowing. In this way, the lightning surge flows from the terminal terminal 15 (N) to the two-type ground via the pole transformer, so that the lightning surge flows quickly even if the distribution board 1 is not grounded. There is.

If the terminal terminal 17 (E) is grounded, a lightning surge is transmitted via the ground-to-ground lightning arrester element 20 at a distance shorter than that of the above-described two-type grounding via the terminal terminal 15 (N). It can be flown to the ground and forms another route to escape lightning surges, improving versatility.

By providing one lightning arrester 20 to the ground in this way, a simple circuit structure can be realized. Generally, the withstand voltage between the electric equipment and the ground is high, and even one grounding lightning arrester element 20 can provide the minimum protection. Conventionally, three line-to-line lightning arresters A1 to A3 and three inter-ground lightning arresters A4
~ A6 was used (see Fig. 7), the distribution board arrester 11 of the present invention has two line arresters 18,1.
By using 9 and one grounding lightning arrester 20, almost the same function is exhibited.

In the arrester 11 for the distribution board of the present invention,
When the line-to-line lightning arresters 18, 19 or the ground-to-ground lightning arrester 20 are deteriorated, the electric appliances in the home are disconnected from the power line by the glass tube fuses and the temperature fuses, which are the disconnecting elements 23 to 26, and the occurrence of a ripple accident occurs. In addition to being able to prevent it, the operation lamps 12 and 13 are turned off so that a visual inspection can be easily performed and the lightning protection element can be replaced promptly.

In the embodiment described in detail above, as in the case where one distribution board arrester 11 is arranged at the safety breaker mounting portion P13 on the terminal fitting 7 (L2) side, the terminal fitting 7 (L2) or 8 is installed. This is the case where it is attached to either one of the (L1) side, but in addition to this, two distribution board arresters are provided for the terminal fittings 7 (L2) and 8 (L).
1) side safety breaker mounting parts P13, P23
It is also possible to arrange in

In the embodiment using two distribution board arresters 30 and 31, terminal terminals 33 (L2), 34 (N) and 3 are provided at the four corners of the arrester body as shown in FIG.
Distributor arrestor 30 having 6 (E) [Fig. 5 (a)]
Reference] and terminal terminals 35 (L1), 34 (N),
Distributor arrester 31 having 36 (E) [Fig. 5
(See (b)].

Distributor arrestors 30, 31 respectively
Is one line arresting element 37, 38 and two inter-grounding arresting elements 39-4 as shown in the equivalent circuit of FIGS.
1 and the one line-to-line lightning arrester element 37, 38 and the two ground-to-ground lightning arrester elements 39-41, as well as the line-to-line lightning arrester element 37, 3 as shown in the concrete circuit of FIG.
8, a light emitting diode (actuating lamp) which is a display element 42, a resistor 43, and a protective diode 44 are connected in parallel, and a thermal fuse which is a disconnection element 45, 46 is connected in series to the ground lightning arresters 39 to 41 and a terminal is connected. Terminal 33
Glass tube fuses, which are the separating elements 47 and 48, are provided on the (L2), 34 (N) or 34 (N), 35 (L1) side.

These two distribution board arresters 30, 31
The terminal terminals 33 to 36 to the terminal fitting 6
Terminal fittings 7 (L2) and 8 connected to ~ 8
By disposing the safety breaker mounting portions P13 and P23 on the (L1) side, respectively, a total of six lightning arresters A1 to A, each including three line lightning arresters and a ground lightning arrester, as in the conventional case.
The function equivalent to that when 6 is used (see FIG. 7) is exhibited.

Incidentally, between the terminal terminals 33 (L2) and 34 (N) of the one distribution board arrester 30, and between the terminal terminals 35 (L1) and 34 of the other distribution board arrester 31.
Since (N) is AC100V in both, AC between two line lightning arrester elements 37 and one line arrester element 38 in series.
The voltage is 200 V, which is equivalent to the case of the conventional lightning arrester A3 between the outer lines L2 and L1 (see FIG. 7).

In the above embodiment, the case where the power line of the single-phase three-wire system is applied has been described, but the present invention is not limited to this, and the single-phase two-wire system and the three-phase three-wire system are also applicable. Of course, it is applicable.

[0034]

According to the present invention, an arrester having substantially the same shape as a safety breaker is stored inside an existing residential distribution board installed in a home, and the storage location of the arrester is for expansion. It is a safety breaker attachment site provided as. Therefore, it is not necessary to externally install an arrester in which a lightning arrester is housed in a special case outside the distribution board, so that the space can be effectively used and the appearance is neat. Also, even if the arrester is stored inside the distribution board,
Therefore, the distribution board itself does not become large, and it is sufficient to use the existing distribution board installed in a general household.

Further, since the arrester is installed inside the distribution board and is attached to the lightning surge intrusion route common to all the household electric appliances to be protected, the lightning surge is effectively absorbed by one arrester. It is possible to realize a compact arrester with the same performance as conventional products.

Installation of the arrester becomes simple, and the case wiring as in the conventional case is not required by only the installation work by the contractor or the board manufacturing maker, and the cost required for this is minimized. It can be installed in the empty space of the distribution board for houses,
It is effective and has marketability as one of the measures for low voltage lightning protection in the future.

[Brief description of drawings]

FIG. 1 (a) is a plan view showing a state in which a distribution board arrester of the present invention is incorporated in a distribution board and a cover is removed, and FIG. 1 (b) is a distribution board arrester of the present invention incorporated in a distribution board. Plan view showing the state where the cover is attached with

FIG. 2 is an equivalent circuit diagram showing an internal configuration of an arrester for a distribution board of the present invention.

FIG. 3 is a specific circuit diagram showing the internal configuration of the arrester for distribution board of the present invention.

FIG. 4 is a partial schematic configuration diagram showing a state in which two arresters for a distribution board are incorporated in the distribution board in another embodiment of the present invention.

5A is an equivalent circuit diagram showing the internal configuration of one distribution panel arrester shown in FIG. 4, and FIG. 5B is an equivalent circuit diagram showing the internal configuration of the other distribution panel arrester shown in FIG.

FIG. 6 is a specific circuit diagram showing the internal configuration of the arrester for distribution board of FIG.

FIG. 7 is a configuration diagram showing a state in which six arresters are attached to a power line.

[Explanation of symbols]

1 distribution board 9,10 Safety breaker 11 Distribution board arrester 12, 13 Operation lamp (display element) 18, 19 Line arrester 20 Ground arrestor 23-26 Separation element 30, 31 Distribution board arrester 37,38 Lightning protection element between lines 39-41 Lightning protection device to ground 42 Operation lamp (display element) 45-48 Separation element 50 window P11, P21 Safety breaker installation site P12, P22 Safety breaker installation site P13, P23 Safety breaker installation site for expansion

─────────────────────────────────────────────────── ─── Continuation of front page (58) Fields surveyed (Int.Cl. ⁷ , DB name) H02B 1/40-1/42 H02H 9/04-9/06

Claims (2)

(57) [Claims] 1. A plurality of safety brakes provided inside a single-phase three-wire type distribution panel consisting of a neutral wire N and outer wires L1 and L2.
Free space provided for expansion of the marker mounting area
Disposed on one of the two safety breaker mounting site condition, the arrester body of substantially the same shape as the safety breaker
In addition, the safety breaker has a
So that it is exposed in the open window for the switch
Distribution board with operating lamps on the top of the arrester body
Is an arrester for connecting the neutral wire N and the outer wires L1 and L2, respectively.
And two display elements two and the line arrester element and which are connected in parallel which were the two lines between the arrester elements connected in common
One ground-to-ground lightning arrester element connected between the neutral wire N and the ground, the outer wire L1 and L2 side of each wire-to-lightning arrester element, and the neutral wire N
Side switch, and an arrester for a distribution board, which is configured by a circuit with four separating elements disposed on the ground side . 2. A plurality of safety brakes provided inside a single-phase three-wire type distribution board consisting of a neutral wire N and outer wires L1 and L2.
Free space provided for expansion of the marker mounting area
Disposed on both of the two safety breaker mounting site of state,
Having an arrester body that is almost the same shape as the safety breaker
In addition, a safety breaker breaker switch is installed on the front of the distribution board.
Operation run so that it is exposed in the window opened for
Are installed on the upper surface of the arrester body
A neutral line connecting the neutral line N and the outer line L1 or L2, an interline lightning protection element and a display element connected in parallel with the interline lightning protection element, and the neutral line connecting the interline lightning protection element. N and outer line
And two ground between lightning protection elements connected respectively between L1 or L2 and ground, the outer lines of the line between the arrester elements L1 or L2
Side, neutral line N side, and a circuit configuration of four disconnecting elements arranged on the ground side , an arrester for a distribution board.