JP2007143242A - Distribution switchboard - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a distribution switchboard wherein, when a service interruption occurs in the nighttime or a circuit breaker is tripped or on other like occasions, the position of the distribution switchboard and the position of the tripped circuit breaker can be easily identified. <P>SOLUTION: When an overcurrent is passed through a load 17 and a current exceeding an allowable current is detected at a current detection/interruption unit 11, power supply to the downstream side is shut off. Thus, a current is not passed through the load 17 and power is not supplied to a trip display circuit 10, either. For this reason, a green LED 15a is turned off. Meanwhile, the base voltage of a transistor TR becomes negative (-). Therefore, a current discharged from capacitors C3, C4 is passed between points P6 and P7. Thus, a red LED 15b is turned on. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a distribution board, and more particularly, to a distribution board in which a breaker position can be easily specified in the event of a power failure.

Conventionally, a distribution board is provided with a main breaker (a limiter may be installed depending on the electric power company) connected to a single-phase three-wire circuit and a plurality of sub-breakers, and an opening for an operation handle of each breaker. In the case where the breaker trips, the operation handle of the corresponding breaker is operated to recover the breaker. However, in the case of a trip at night or the like, there is a problem that it is difficult to identify the breaker that has tripped because the surroundings of the distribution board are dark. In order to solve such a problem, a technique for illuminating a distribution board by providing a battery as an emergency power source inside the distribution board is known (for example, see Patent Document 1).

However, the provision of an emergency power supply circuit inside the distribution board has a problem that it goes against the demand for downsizing the distribution board. For this reason, there has been a demand for a distribution board that does not interfere with the trip without changing the existing distribution board structure.
JP-A-7-31013

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a distribution board in which the position of the distribution board and the position of the tripped breaker can be easily specified, especially at nighttime power outage or when a breaker trip occurs. .

  In order to solve the above-mentioned problems, a distribution board according to the present invention is a distribution board having a main breaker and a child breaker, and the breaker position display is provided on at least one of the main breaker and the breaker main body. And a lighting means for turning on the breaker position display light source at the time of a trip (claim 1).

The invention of claim 2 is characterized in that, in the above, the light source is provided inside a breaker operation handle.
The invention of claim 3 is characterized in that, in the above, the light source is provided on the front surface of the distribution board and at a position where the light source is visible when the cover is closed.

According to a fourth aspect of the present invention, in the above, the light source is provided on the front surface of the distribution board for the main breaker and at a position where it can be seen when the cover is closed, and inside the breaker operation handle for the child breaker. It is characterized by.
The invention of claim 5 is characterized in that, in the above, the lighting means further comprises means for lighting in different colors when the breaker is energized and when the trip occurs.

The invention of claim 6 is characterized in that, in the above, the lighting means uses a capacitor charged during energization as a power supply source.
The invention of claim 7 is characterized in that, in the above, the light source is a multicolor LED lamp.
The invention of claim 8 is characterized in that, in the above, the front surface of the distal end portion of the breaker operation handle incorporating the light source is formed of a member capable of discriminating allowable amperage display by transmitted light at the time of lighting.
The invention of claim 9 is characterized in that, in the above, a light source window hole is provided on at least one side of the upper surface or the lower surface of the tip of the breaker operation handle.

According to the present invention, it is possible to easily identify a distribution board position and a tripped breaker location by turning on an LED at the time of a night power failure or a trip.
Further, according to the invention in which the LED is not lit during energization but is lit only when the breaker is cut off, it is effective from the viewpoint of energy saving.
Moreover, according to the invention for changing the LED color during energization and tripping, it is effective to easily identify the tripped breaker.
Further, according to the invention in which the light source is provided in the vicinity of the main breaker or the child breaker on the front surface of the main body panel, it can be dealt with by modifying only the distribution board circuit without modifying the existing breaker. Therefore, for example, even when the main breaker is an asset of the electric power company, it is easy to cope.

  Hereinafter, an embodiment of a distribution board according to the present invention will be described in more detail with reference to FIGS. In order to avoid duplication, in each figure, the same structure is shown using the same code | symbol. Needless to say, the scope of the present invention is described in the claims and is not limited to the following embodiments.

(First embodiment)
FIG. 1 is a diagram illustrating an overall configuration in a state where a cover of a distribution board 1 according to the present embodiment is removed. FIG. 2 is a diagram illustrating a circuit configuration of the LED display unit of the child breaker 2. FIG. 3 is a diagram showing a cross-sectional configuration of the distal end portion of the operation handle 20 of the child breaker 2. FIG. 4 is a diagram showing a current path when the child breaker 2 is energized. FIG. 5 is a diagram showing a current path when the child breaker 2 is tripped.

  Referring to FIG. 1, distribution board 1 includes a main breaker 4 connected to voltage lines L0 and L1 and a neutral line N0 of a single-phase three-wire wiring line, an earth leakage breaker 5, and a neutral circuit. Six 100 V slave breakers 2 connected to the line N1 and the voltage line L0 or L1, and two 200V slave breakers 3 connected to the voltage lines L0 and L1 are provided. Each of the child breakers 2 and 3 is provided with a handle portion 20 that rotates downward during a trip. Normally, the main body 1a is covered with a main body cover (not shown) and only the operation handle is exposed, but here, the cover is shown open.

  Referring to FIG. 2, the child breaker 2 includes a current detection / cutoff unit 11, a load circuit 12 connected to the downstream side thereof, and a trip display circuit 10. The current detection / cut-off unit 11 is connected to the voltage line L1 and the neutral line N1, and both have a contact point (not shown), a detection circuit that cuts off the contact point when a current exceeding the allowable current is detected, and a cut-off circuit as main components. . A load 17 is connected to the terminal side of the load circuit 12.

  The trip display circuit 10 includes a surge absorbing element SA, a current drop circuit 14, a rectifier circuit 13, an LED lighting circuit 16, and a charging circuit 18. The current drop circuit 14 includes a capacitor C1 and a resistor R1. The rectifier circuit unit 13 includes a full-wave rectifier circuit 13a, a Zener diode D1, and a capacitor C2 that rectify alternating current into direct current. The LED lighting circuit 16 includes a PNP transistor TR, a two-color (multicolor) light-emitting diode (LED) 15 as a light source, and a circuit for connecting them as main components so that different colors are displayed during energization and tripping. To do. The LED 15 has a green LED 15a and a red LED 15b inside. As will be described later, the charging circuit 18 is for supplying power to the LED at the time of trip, and two sets of charging circuits are constituted by the capacitors C3 and C4 and the clip Zener diodes D3 and D4.

  Referring to FIG. 3, the operation handle 20 has an opening 25 and a hollow portion 26 at the distal end portion of the main body 21, and the two-color light emitting LED 15 is built in the hollow portion 26. The LED 15 is connected to the protective tube 24. The protective tube 24 is fixed to the main body 21 by a support 23, and a lead wire (not shown) for power supply is inserted therein. A semi-transparent plastic display board 22 displaying the allowable amperage is fitted in the opening 25.

The distribution board 1 is configured as described above. Next, the behavior at the time of energization and breaker trip in this embodiment will be described with reference to FIGS.
Referring to FIG. 4, when energized, power is supplied to load 17 via voltage line L2 and neutral line N2 on the load circuit 12 side as shown by the thick line. Further, a current flows between P3 and P4 on the trip display circuit 10 side, and the green LED 15a is turned on. On the other hand, since the base voltage of the transistor TR is on the plus (+) side, no current flows between P6 and P7, and the red LED 15b is turned off. Further, current flows between P8 and P9 until the capacitors C3 and C4 are charged.

  Next, referring to FIG. 5, for example, when an excessive current flows in the load 17, when a current exceeding the allowable current is detected in the detection unit of the current detection / breaking unit 11, the contact is opened and the power to the downstream side is opened. Shut the supply. As a result, no power is supplied to the load circuit 12 side and the trip display circuit 10 side. Therefore, the green LED 15a is turned off. On the other hand, since the base voltage of the transistor TR becomes the minus (−) side, a current flows between P6 and P7 due to the discharge (discharge) from the capacitors C3 and C4 using this as a trigger. Thereby, the red LED 15b is turned on. The lighting time is determined by the capacitor capacity.

As described above, when the child breaker 2 is in the trip state, the red LED 15b built in the operation handle 20 is turned on and the red light is transmitted through the translucent display board 22. It can be easily identified.
In this case, since the spare breaker is always in the off state, it is easy to distinguish it from the active breaker that is lit in green or red.

In addition, although it was set as the form which uses 2 color light emission LED in this embodiment, it can also be set as the form lighted only at the time of a trip using not only this but single color LED. In this case, the energized breaker and the spare breaker are turned off, and the trip breaker is turned on.
Furthermore, in this embodiment, although it was set as the form which mounts LED in a child breaker, it is good also as a form mounted not only in this but also in a main breaker.
Further, in the present embodiment, two sets of charging circuits 18 are provided. However, the present invention is not limited to this, and the capacitor capacity and the number of sets can be selected according to the required lighting time at the time of trip.

(Second embodiment)
Next, another embodiment of the present invention will be described. FIG. 6 is a view showing the distal end portion of the operation handle 30 of the child breaker according to the present embodiment. With reference to the figure, the operation handle 30 is different from the operation handle 20 according to the first embodiment in that the opening is not provided on the front surface but on the top and bottom surfaces of the tip. That is, openings 32a and 32b are provided on the upper and lower surfaces of the distal end portion 31 of the operation handle 30 main body. Since other configurations are the same as those of the first embodiment, description thereof is omitted. By providing the opening in this manner, the periphery of the child breaker that has tripped when the LED 15 is lit is displayed brightly, and the breaker can be easily identified.

(Third embodiment)
Furthermore, another embodiment of the present invention will be described. FIG. 7 is a diagram showing a distribution board 40 according to the present embodiment. In the figure, a state where the cover 40a is put on the main body is shown. The difference between the distribution board 40 and the distribution board 1 according to the first embodiment is that the operation handle 43 of the main breaker 41 does not incorporate an LED lamp, and instead of this, an indicator lamp is provided below the main breaker 41. 42 is provided. The cover 40a is provided with an opening so that the indicator lamp 42 can be seen when the cover is closed. Since the configuration of the trip display circuit of the main breaker 41 is the same as the configuration of the child breaker in the first embodiment, illustration and description are omitted. With this configuration, the color of the indicator lamp 42 changes from green to red when the main breaker 41 is tripped. Thereby, it can be identified that the main breaker 41 has tripped.
(Fourth embodiment)
Furthermore, another embodiment of the present invention will be described. FIG. 8 is a diagram showing the distribution board 50 according to the present embodiment. In the figure, the point that the indicator lamp 52 is provided directly under the main breaker 51 is the same as that of the third embodiment. The same applies to the point that each indicator lamp aperture is provided at each indicator lamp position of the cover 50a. The distribution board 50 is different from the distribution board 40 in that the indicator breaks 56 and 58 are also provided below the breakers 54 and 58. Since the configuration of the trip display circuit is the same as that of each of the embodiments described above, illustration and description thereof are omitted. By providing such a configuration, for example, when the breaker 58 trips, the color of the indicator lamp 57 changes from green to red. This facilitates the location of the tripped breaker 58.

  The present invention can be widely applied to a distribution board having a main breaker and a child breaker regardless of the application.

It is a figure which shows the whole structure at the time of lid opening of the distribution board 1 which concerns on 1st embodiment. It is a figure which shows the circuit structure of the LED display part of the child breaker. It is a figure which shows the cross-sectional structure of the operation handle 20 front-end | tip part of the child breaker 2. FIG. It is a figure which shows the electric current path at the time of the child breaker 2 energization. It is a figure which shows the electric current path at the time of the trip of the child breaker 2. FIG. It is a figure which shows the front-end | tip part of the operation handle 30 of the child breaker which concerns on 2nd embodiment. It is a figure which shows the whole structure at the time of lid closing of the distribution board 40 which concerns on 3rd embodiment. It is a figure which shows the whole structure at the time of lid closing of the electricity distribution panel 50 which concerns on 4th embodiment.

Explanation of symbols

1, 40, 50 .. Distribution board 2, 3, 44, 54, 55... Breaker 4, 41, 51 .. Main breaker 5. 6, 45, 59... Leakage breaker 10... Trip display circuit 11... Current detection / breaking unit 12. Rectifier circuit 15 ··· Two-color LED
15a ... Green LED
15b Red LED
17... Load 18... Charging circuit 20, 30, 43... Operation handle 22... Translucent display boards 42, 52, 56, 57.

Claims (9)

A distribution board with a main breaker and a child breaker,
A breaker position display light source in the main body of the breaker or in the vicinity of the breaker of at least one of the main breaker and the child breaker;
Lighting means for turning on the light source for breaker position display at the time of trip,
A distribution board characterized by comprising: The distribution board according to claim 1, wherein the light source is provided inside a breaker operation handle. 2. The distribution board according to claim 1, wherein the light source is provided on a front surface of the distribution board and at a position where the light source is visible when the cover is closed. 2. The light source according to claim 1, wherein the light source is provided on the front surface of the distribution board for the main breaker and at a position where the light is visible when the cover is closed, and inside the breaker operation handle for the child breaker. Distribution board. 5. The distribution board according to claim 1, wherein the lighting means further includes means for lighting in different colors depending on whether a breaker is energized or tripped. 6. The distribution board according to claim 1, wherein the lighting means uses a capacitor charged during energization as a power supply source. The distribution board according to claim 1, wherein the light source is a multicolor LED lamp. The distribution board according to any one of claims 1 to 7, wherein a front surface of a tip end portion of the breaker operation handle incorporating the light source is configured by a member capable of discriminating allowable amperage display by transmitted light at the time of lighting. 9. The distribution board according to claim 1, wherein a light source window hole is provided on at least one side of the upper surface or the lower surface of the tip of the breaker operation handle.

Images