JPS6026481Y2 - Distribution board - Google Patents

Description

[Detailed Description of the Invention] The purpose of this invention is to easily incorporate a current detection sensor for checking the energization status of each branch circuit branched through the distribution board with respect to the distribution board.

An embodiment of this invention is shown in FIGS. 1 to 8.

That is, this distribution board has a current detection sensor that detects the current of each branch circuit wired from the branch circuit breaker 2 on a mounting frame 3 that fixes the main circuit breaker 1, the branch circuit breaker 2, etc. An energization display mounting block 5 to which an energization indicator lamp 4 is attached is fixed.

The energization display mounting block 5, as shown in FIG.
A pair of load side connection terminal portions 2a' of each branch circuit breaker 2
The upper end is provided with a plurality of lamp fixing parts 6 that can be inserted into the recesses 2b for screw fastening operation held in the breaker, and the lower end is provided with a load-side lamp through which the load-side wiring connected to each branch circuit breaker 2 is inserted. A pair of wiring holes 7 are integrally formed so as to correspond to each of the lamp fixing parts 6, and when the branch circuit breaker 2 is fixed to the mounting frame 3, the mounting frame 3 and the branch circuit breaker 2 are connected to each other. The lamp fixing portions 6 are fixed to a heat sink 8 for a branch circuit breaker interposed between the lamp fixing portion 6 and the branch circuit breaker 2 so that each lamp fixing portion 6 corresponds to each concave portion 2b of the branch circuit breaker 2, respectively.

As shown in FIG. 5, the lamp fixing part 6 of the energization display mounting block 5 has a lamp mounting hole 9 bored in the vertical direction, and a hood 10 surrounding the hole 9 is formed on the upper surface.

The inside of this hood 10 is formed into a concave spherical shape, and
This surface is colored in a dark color to enhance the lighting display effect of the lamp 4.

Further, each pair of load-side wiring insertion holes 7 corresponding to each branch circuit breaker 2 provided at the lower end of the energization display mounting block 5 are conically shaped toward the outer surface of the energization display mounting block 5. It is expanded to serve as a guide surface when passing electric wires through the load side wiring.

Furthermore, a circular recess 11 is formed in one of the pair of holes 7 from the back side of the energization display mounting block 5, into which a current transformer 12 of the current detection sensor is fitted.

The thickness of the energization display mounting block 5 is made thin enough to fit the current transformer 12 at most, and the energization display mounting block 5 is made as thin as possible to the load side connection terminal portion 2a' of the branch circuit breaker 2. They are placed next to each other.

On the other hand, a detection signal processing means mounting block 13 comprising means for comparing and discriminating signals detected by the current transformer 12 of the current detection sensor and lighting the energization indicator lamp 4 and associated accessory means is shown in FIG. It is fixed to one mounting surface 3a of a butt-shaped mounting frame 3, which is fixed to a mounting flange (not shown) on the front surface of the box 14 shown in FIG.

The mounting surface 3a of this mounting frame 3 is branched at both ends,
The remaining middle part is slightly stepped from the mounting surfaces 3a at both ends and is bent upward to form a front plate mounting surface 3b, and on the side where the detection signal processing means mounting block 13 is installed, this front plate mounting surface 3b and The detection signal processing means mounting block 13 is sandwiched between the box mounting surfaces 3a.

Further, the load-side wiring connected to each branch circuit breaker 2 is routed using the space created below the mounting surface 3a of the mounting frame 3.

In addition, in FIG. 1, 3c is a box attachment hole, and 3d is a front plate attachment hole.

In addition, on the front plate 15 (FIG. 7) that covers the front surface of the box 14 to which the mounting frame 3 is attached, there are windows 16 corresponding to the bundles 2a of the branch circuit breakers 2 in the vicinity of the windows 16 through which the bundles 2a of the branch circuit breakers 2 are exposed. A lamp exit hole 17 is provided so that the energization indicator lamp 4 corresponding to each bundle 2a is exposed.

As shown in FIG. 8, the current detection sensor incorporated in this distribution board connects the outputs of the plurality of current transformers 12 in parallel to detect the current of the branch circuits connected to each branch circuit breaker 2. A first multiplexer 18 that inputs as a signal, converts it into a serial signal, and outputs it, a detection signal processing means 19 that amplifies the output of this multiplexer 18, compares it with a reference voltage, and processes it for determination, and this detection signal processing means 19, a second multiplexer 20 that converts the output of the first multiplexer 20 from a serial signal to a parallel signal, and outputs the converted signal; It is equipped with a counter circuit 21 that supplies a control signal for synchronous driving to the second multiplexer, and the clock signal input to this counter circuit 21 is generated by a pulse generation circuit 23 based on an AC power supply 22 connected to this distribution board. This method extracts and uses a signal that is more synchronized with the power supply frequency.

Therefore, in this distribution board, the detection signals of each current transformer 12 are time-divided into serial signals by the action of the first multiplexer 18 that operates in synchronization with the AC power supply 22 connected to this distribution board. The signal is then input to the detection signal processing means 19 at the next stage.

Here, the input signal is compared with a reference voltage set corresponding to 9, for example, lQQmA of the primary current of the current transformer 12, that is, the energizing current of the branch circuit connected to each branch circuit breaker 2. A pulse signal is output to the second multiplexer 20 when the value exceeds .

Since the second multiplexer 20 also operates in synchronization with the first multiplexer 18, the comparison judgment output from the detection signal processing means 19 corresponds to the corresponding energization indicator lamp 4.
is transmitted, and lamp 4 lights up.

Due to the periodic time-division transmission action of the multiplexer 18, 20, the energization indicator lamp 4 corresponding to the branch circuit in which the current exceeding the predetermined current set in the detection signal processing means is being supplied flickers.

Note that the current detection sensor is not limited to one that sends a detection signal to the corresponding energization indicator lamp 4 in a time-division manner and causes it to flicker as described above, but may also be one that causes it to illuminate continuously, or may be one that causes the current indicator lamp 4 to flicker. It is also possible to have continuous lighting up to a certain level, and transition to flickering lighting when this level is exceeded.

With this configuration, this distribution board allows, for example, the usage status of each circuit used in the home to be checked at a glance, making it possible to prevent forgetting to turn off lights.

In addition, if the lamp is lit continuously for normal current usage and flickered for overcurrent, it is possible to display the usage status of each circuit and issue an overcurrent warning at the same time.

In addition, the current detection sensor is divided into an energization indicator mounting block 5 that incorporates an energization indicator lamp and a current transformer, and a signal processing means mounting block 13 that incorporates other circuit elements such as a detection signal processing means, and these are used to cut off the main circuit. Since the circuit breaker 19 and the branch circuit breaker 2 are integrally fixed on the mounting frame 3, it is possible to easily add an energization display function to a conventional distribution board. Since the detection sensor can be assembled as an integrated internal unit, installation of the distribution board becomes extremely easy.

Moreover, the lamp fixing part 6 of the energization display mounting block 5 is
A pair of load side connection terminal portions 2a' of each branch circuit breaker 2
Since the energization indicator block 5 is disposed on the load side of the branch circuit breaker 2, the energization indicator lamp 4
can be made to face the front plate 15 in correspondence with the bundle 2a of each branch circuit breaker 2, making positioning of the lamp extremely easy.

In addition, since the hood 10 having a concave spherical inner surface is provided on the surface of the lamp fixing part 6 to surround the energized indicator lamp 4, it is possible to not only protect the lamp 4 from external forces but also to prevent the illumination of the lamp 4 from occurring due to the concave spherical surface. The display effect can be enhanced by focusing the light in front.

Note that the display effect can be further improved by coloring this concave spherical surface in a dark color.

Furthermore, a pair of load-side wiring holes 7 are formed at the lower end of the energization display mounting block 5 so as to correspond to the respective lamp fixing parts, and a circular recess 11 is formed in one of the holes. Since the current transformer 12 is fitted, the wiring process for the current detection sensor is facilitated, and the energization display block 5 is placed close to the load side connection terminal portion 2a of the branch circuit breaker 2. Therefore, connection of the load side cord to the branch circuit breaker 2 becomes extremely easy.

In addition, in this connection work, since the load-side wiring hole 7 is conically expanded toward the front of the energization display mounting block 5, it is easy to insert the cord into the hole 7. I can do it.

As described above, the distribution board of this invention has a plurality of branch circuit breakers installed in parallel on the mounting frame, and a cord inserted into a pair of cord connection ports on the load side connection terminal of each branch circuit breaker. , a plurality of load-side wiring holes through which the plurality of cords are inserted are formed in parallel corresponding to positions of each pair of cord connection ports of the load-side connection terminal group of the parallel branch circuit breaker; a energization indicator mounting block to which a plurality of lamps are attached for displaying the energization status of the cords; A plurality of current transformers attached to the energization display mounting block are connected to each of the energization indicator lamps, and the energization indicator lamp corresponding to the current transformer is displayed according to the operation of each current transformer. a detection signal processing means for energizing, and the plurality of load side wiring holes are located at the plurality of cord connection ports with respect to the load side connection terminal portion of the parallel branch circuit breaker group, the energization display mounting block is Since it is worn in a corresponding state, the following effects are achieved.

(a) Each current transformer corresponds to the cord inserted into the load side connection terminal of each branch circuit breaker, and energization indicator lamps are provided corresponding to each current transformer, so each The current state of the electrical path passing through the branch circuit breaker can be clearly distinguished and detected for each branch circuit breaker.

(b) When the energization display mounting block is attached to the load-side connection terminal section of the parallel branch circuit breaker group, the multiple load-side wiring holes of the energization display mounting block connect to the multiple cords of the parallel load-side connection terminal section. Since the position corresponds to the connection port, when connecting the cord by inserting it into the cord connection port of each load side connection terminal section, simply insert the cord into the load side wiring hole of the energization display mounting block and continue pushing the cord. With this extremely simple operation, the cord can be accurately connected to the cord connection port of the load side connection terminal section while using the load side wiring hole as a guide for inserting the cord.

(C) When the cord is inserted into the load side wiring hole and cord connection port, one cord of each pair of cords is automatically inserted into the current transformer, so the balanced relationship between the current transformer and the cord is maintained. It is simple, and the code for the current transformer can be set accurately and easily.

[Brief explanation of the drawing]

Fig. 1 is a partially cutaway plan view of the main parts of an embodiment of this invention, Fig. 2 is a front view thereof, Fig. 3 is a right side view thereof,
Fig. 4 is an exploded perspective view of the main part thereof, Fig. 5 is a longitudinal sectional view of the energization indicator block of the embodiment, and Fig. 6 is a longitudinal sectional view of the main part showing the relationship between the energization indicator block and the front plate. , FIG. 7 is an external perspective view thereof, and FIG. 8 is a block diagram of the current detection sensor used in this embodiment. 1... Main circuit breaker, 2... Branch circuit breaker, 2a... Bundle, 3...
・Mounting frame, 3a...Box mounting surface, 3b...
...Front plate mounting surface, 4...Power indicator lamp, 5...Power display mounting block, 6...
・Lamp fixing part, 7...Load side wiring hole, 8・
... Heat sink, 9 ... Lamp mounting hole, 1
0...Hood, 11...Circular recess,
12...Current transformer, 13...Detection signal processing means mounting bracket, 14...Box, 15
...Front plate, 16...Window, 17...
. . . Lamp exit window, 18, 20 . . . Multiplexer, 19 . . . Detection signal processing means, 21.
... Counter circuit, 22 ... AC power supply,
23...Pulse generation circuit.

Claims (1)

[Scope of utility model registration request] Multiple branch circuit breakers installed in parallel on the mounting frame, cords inserted into a pair of cord connection ports on the load side connection terminals of each branch circuit breaker, and multiple load side wirings through which these multiple cords are inserted. Forming holes in parallel corresponding to the positions of each pair of cord connection ports of the load side connection terminal group of the parallel branch circuit breaker, and installing a plurality of lamps to display the energization status of the individual cords. a plurality of current transformers attached to the energization display block in a position corresponding to one of the pair of cord connection ports of each of the load-side connection terminal portions; A detection signal processing means connects the plurality of current transformers and each of the energization indicator mounting lamps and energizes the energization indicator lamp corresponding to the current transformer according to the operation of each current transformer, and the energization indicator A distribution board, wherein a mounting block is attached to a load-side connection terminal portion of the parallel branch circuit breaker group in such a manner that the plurality of load-side wiring holes correspond to the positions of the plurality of cord connection ports.