JPH0313866A - Power integration apparatus and distribution board - Google Patents

Abstract

PURPOSE:To make the diversion of a branch circuit possible by taking out the sum of the current outputs of a plurality of current detectors between which respective branch circuits are interposed and inputting this current output sum to a watt-hour meter. CONSTITUTION:A branch circuits 3 are divided into a plurality of groups A, B,... corresponding to respective users and a watt-hour meter 7 is mounted at every group of the branch circuits 3. The voltage wire 8 connected to the main circuit 1 of a master switch 2 on the load side thereof is connected to each watt-hour meter 7 and the voltage between live wires 1a, 1b and a neutral wire 1c are inputted to the watt-hour meter 7. The sum of the current outputs of the respective current detectors 6 of each group of the branch circuits 3 is taken out at every respective live wires 1a, 1b and this current output sum is inputted to the watt-hour meter 7. Then, power integrating operation is performed from the inputted voltages between the live wires 1a, 1b and the neutral wire 1c and the current output sum of the respective current detectors 6 at every live wires 1a, 1b of the group of the branch circuits 3 by the watt- hour meter 7. By this method, the individual integrated power of each branch circuit can be measured and the branch circuits 3 can be diverted.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a power integration device and a distribution board for power distribution lines.

[Conventional technology]

In this type of distribution line, power is generally supplied by connecting a main circuit with a main switch to multiple branch circuits with branch switches, and when integrating the power supplied by this distribution line. In this method, the current flowing through the main circuit is input directly or through a current transformer to an integrating wattmeter, and the integrating power needle calculates the power integration with the applied voltage.

When using this distribution line power integration device, for example, if there are multiple power users such as a joint store or a multi-tenant building, it is necessary to measure the integrated power for each user individually due to the payment of power charges. However, since the power integrating device that measures the main circuit current cannot perform each measurement, an independent power distribution line including the main circuit is required for each user.

In this case, generally, as shown in FIG. 8, for example, the master switch 51 is shared, and individual main circuits 54 are constructed by running wiring 53 from the load side of the master switch 51 to each independent integrating wattmeter 52. However, each main circuit 54 is connected to a branch circuit 56 with a branch switch 55 interposed therebetween.

On the other hand, as a distribution board to which the above-mentioned power integration device for distribution lines is applied, the box has a main switch to which external lead-in wires are connected, and an integrating wattmeter electrically connected to the load side of the main switch. , a main bar hanging below the main switch connected to this integrated wattmeter, and a plurality of branch switches located on both sides of this main bar to connect external lead wires that are electrically connected to the main bar. It is constructed by storing.

Even in this case, as mentioned above, when measuring the integrated power for each user individually, each block 5 of the main bar 57 and branch switch 55 in the one shown in FIG.
8 will be individually and independently equipped for each user.

[Problem to be solved by the invention]

However, in the above-mentioned distribution line power integration device, the circuit wiring 53 to the integration wattmeter 52 is required each time, and furthermore, the circuit on the load side of the integration wattmeter 52 is an independent branch circuit for the user. 56, it is not possible to divert the - user's branch circuit 56 to another user's branch circuit 56 due to the connection relationship of the integrating wattmeter, and it is not possible to divert the branch circuit 56 of the - user to the branch circuit 56 of another user. The branch circuits 56 could not be diverted as required, and each branch circuit 56 was fixed for each user.

Furthermore, even though it is on the above-mentioned distribution board, each block of 5 days is fixed for each individual user, so it can be changed depending on the power usage situation and power usage pattern at a later date. The branch circuit 56 cannot be diverted, and in practical terms, the unnecessary branch switch 55 of the - user cannot be diverted as the branch switch 55 of another user. Due to design and construction considerations, it was necessary to equip branch switches with sufficient margins, and the distribution boards tended to become larger.

The present invention has been made in view of the above-mentioned factors and reasons, and its purpose is to enable integrated power measurement of each user and to easily divert corresponding branch circuits as necessary. An object of the present invention is to provide a flexible power integration device for power distribution lines.

Another object of the present invention is to provide a distribution board that can measure the electric power of each individual user, is flexible enough to easily be used as a branch switch if necessary, and can be made to have an appropriate size.

[Means to solve the problem]

In order to solve this problem, the power integration device for a power distribution line according to claim (1) includes intervening current detectors in each branch circuit, taking out the sum of current outputs of the plurality of current detectors,
This current output sum is input to an integrating wattmeter that inputs the voltage of the main circuit and performs a power integrating calculation.

Furthermore, the power integration device for a power distribution line according to claim (2),
In claim (1), the current detector is a current transformer with a branch circuit as the primary winding, and the secondary windings of this current transformer are connected in parallel so that the outputs are added together to calculate the current of the current detector. This is the sum of the outputs.

Further, the distribution board according to claim (3) has a current detector electrically connected in series with the branch switch, inputs the sum of the current output of this current detector, and inputs the applied voltage of the main switch. A power meter that performs power integration calculations is housed in a box.

Moreover, in the distribution board according to claim (4), the outer shell of the current detector is substantially the same as the outer shell of the current detector that can be replaced with the branch switch.

[For production]

According to the power integration device for a distribution line according to claim (1) above, since the sum of the current outputs of the current detectors each installed in a branch circuit indicates the supply current of the branch circuit group, The connection support makes it possible to measure the integrated power of each branch circuit, making it possible to repurpose branch circuits as needed without making major changes to the distribution lines.

Furthermore, according to the power integration device for a distribution line according to claim (2), in addition to the power integration device of claim (1), the secondary winding of the current transformer may be connected in parallel, so that the connection to the integration wattmeter is sufficient. This simplifies the process and also simplifies the connection of branch circuits that require power integration calculations to current detectors.

Further, according to the distribution board according to claim (3), a simple current detector can be used without making any major changes to the equipment stored in the distribution board, such as the master switch, main bar, branch switch, etc. This makes it possible to measure the integrated power in each branch circuit group in response to changes in connection to the network, resulting in a flexible distribution board.

Moreover, according to the distribution board recited in claim (4), claim (4)
In addition to 3), a current detector can be installed in the installation space of the branch switch, so installing the current detector alongside the branch switch simplifies the connection between the two, and it can also be installed in conjunction with the branch switch. The location can be set arbitrarily, making effective use of space within the distribution board and easy design and construction of the distribution board.

〔Example〕

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be explained based on FIGS. 1 to 3 showing one embodiment of the invention.

This embodiment shows a power integration device for a power distribution line, in which a main circuit 1 consisting of single-phase three-wire wiring connected to a power source is equipped with a circuit breaker for overcurrent protection or earth leakage protection, a switch with a fuse, etc. A master switch 2 is interposed, and a plurality of branch circuits 3 connected to the load are connected to the main circuit 1 on the load side of the master switch 2.

This branch connection connects each branch circuit 3 to the live wires 1a and 1b of the main circuit 1, and leads a plurality of branch wires 4 from the neutral wire 1c of the main circuit 1 in correspondence with each branch circuit 3. , and branch circuit 3 to supply power to the load.

Therefore, the supply voltage to the load is the live wire 1a of the main circuit 1.
, 1b and the neutral wire 10, which is the applied voltage of the single-phase three-wire wiring.

Each branch circuit 3 is provided with a branch switch 5 such as an overcurrent protection circuit breaker or a switch with a fuse, and a current detector 6 consisting of a current transformer with the branch circuit 3 as a primary winding 6a. ing.

The branch circuits 3 are divided into a plurality of groups A, B, . . . corresponding to each user, and each group of branch circuits 3 is equipped with a power integrator 7 corresponding to each user.

Voltage lines 8 connected to the load-side main circuit 1 of the main switch 2 are connected to each power integrator 7, and live lines 1a, 1b
The voltage between the power integrator and the neutral wire 10 is input to each power integrator 7.

Further, the sum of the current outputs of the current detectors 6 of the three groups of branch circuits is obtained for each live wire 1a, 1b, and this current output sum is inputted to the power integrator 7.

In this embodiment, the current detector 6 is a current transformer, so as shown in FIG. 2, the secondary windings 6b of the current transformers are connected in parallel so that the output directions match each other and the outputs are added. This parallel-connected secondary output is input to a power integrator 7.

Therefore, the sum of the current outputs of each current detector 6 is the vector sum of the currents flowing through each branch circuit 3.

Therefore, in the power integrator 7, the input live wire la,
Voltage between lb and neutral wire 10 and input branch circuit 3
A power integration calculation is performed from the sum of current outputs of each current detector 6 for each live wire 1a, lb of the group.

As shown in the principle circuit diagram shown in FIG. 3, the power integrator 7 integrates the input voltage between the live wires 1a, 1b and the neutral wire 10 and each current flowing through the live wires 1a, lb. The input voltage and current are input to the device 7a, and the power integration device 7
The power is calculated and the calculated values are integrated in the power integration device 7a, and the integrated power amount calculated by the power integration device 7a is externally displayed on the display device 7b, and an external signal is sent out by the pulse oscillation device 7c.

In the present invention, each current flowing through the live wires 1a and 1b shown in the principle circuit for power integration shown in FIG. 3 is the sum of the current outputs of the current detectors 6 interposed in the group of branch circuits 3.

As a result, the necessary integrated power of the branch circuit 3 can be calculated according to the selection of the current detector 6 to be added, and the connection of the current detector 6 does not require major changes to the main circuit 1 and the branch circuit 3. - It becomes possible to change the user's branch circuit 3 to another user's branch circuit 3.

In addition, the current detector 6 is a current transformer, and the secondary winding 6 of the current transformer is
b are connected in parallel to obtain the output sum, the connection line to the integrating wattmeter 7 can be simplified, and the connection to the current detector 6 for the branch circuit 3 for which the power integration calculation is desired is also connected in parallel, which simplifies the connection. .

Furthermore, an embodiment of a distribution board using the above-mentioned distribution line power integration device will be described with reference to FIGS. 4 and 5, using the same reference numerals as above.

This distribution board consists of a left box 9, an upper right box 10, and a lower right box 11.
The upper right box 10 is equipped with a power integrating meter 7 fixed to the door 10a, and is used for storing meters, and the lower right box 11 is used for storing control equipment or emergency power. It is used to store equipment.

This box 12 includes a left box 9, an upper right box 10, and a lower right box 1.
1 are connected to each other, and a connecting member 13 having a wire insertion hole 13a is attached between the left box body 9 and the right upper box body lO.

Further, on the left box body 9, a plurality of equipment mounting plates 15 are fixed to the left and right frames 14 fixed to the box body 9, and a main switch 2 to which an external lead-in wire is connected is fixed to the upper equipment mounting plate 15. At the same time, three main bars 16 are suspended from the main switch 2, and a plurality of neutral switches 17 electrically connected to one of the main bars 16, which will become a neutral line IC, are fixed to the equipment mounting plate 15 at the bottom. There is.

Thus, the main switch 2 and the main switch 16 constitute the main circuit 1 within the distribution board.

In addition, branch equipment mounting plates 18 are fixed to the central equipment mounting plate 15 located on both sides of the three main pars 16, and branch switches 5 and current detectors 6 are attached to the branch equipment mounting plate 18 alternately in the vertical direction. It is fixed in series with the

This branch equipment mounting plate 18 has a hook piece 18a at one end.
A plurality of hook spring pieces 18b are provided at the other end at the same interval in the vertical direction, and the branch switch 5 and the current detector 6 are fixed by the hook pieces 18a and 18b facing each other.

Further, the branch switch 5 and the current detector 6 are connected to the branch switch 5
The vertical width dimension L1 of the current detector 5 and the vertical width dimension L2 of the current detector 5 are made to correspond to each other by an integral multiple, and the upper and lower surfaces 5a of the branch switch 5 and the upper and lower surfaces 6c of the current detector 6 are connected to each other for branch opening/closing. The device 5 has approximately the same shape except for the handle operation part 5b, and the hook pieces 18a and the hook spring pieces 18b of the branch equipment mounting plate 18 are attached to the left and right sides of the branch switch 5 and current detector 6.
Hook holes 5c and 6d are formed respectively.

The electrical connection between the branch switch 5 and the current detector 6 is achieved by electrically connecting the branch bar 19 to one of the main bars 16, which is the live wires 1a and lb, and connecting the branch bar 19 to the branch switch 5.
is connected to the power terminal 5d of the branch switch 5, and the load terminal 5e of the branch switch 5
Connect the connecting bar 20 to the primary power terminal 6e of the current detector 6, connect the external lead wire to the primary load terminal 6f of the current detector 6, and connect the connecting bar 20 to the primary power terminal 6e of the current detector 6. This constitutes a branch circuit 3.

Further, screw holes 16a are formed at predetermined intervals in the main bar 16, which becomes the live wires 1a and Ib, so that the branch bar 19 can be connected at a desired position with a connecting screw 21, and the branch switch 5 and the current detector 6 Electrical connections can be made in response to attachment to any branch equipment mounting plate 18.

Similar to the above embodiment, this branch circuit 3 has external lead wires connected to neutral switches 17 connected to the neutral wire 1c of the main circuit 1 in correspondence with each branch circuit 3. Power is supplied to the load.

Therefore, this branch circuit 3, that is, the branch switch 5 and the current detector 6, is divided into a plurality of groups corresponding to each user, and the secondary output terminal of the current detector 6 of the divided branch circuit 3 is divided into a plurality of groups corresponding to each user. 6g is the same as in the above-mentioned embodiment, the live wires 1a, 1
The terminal block 22, which is connected in parallel with electric wires for each block and connected to the power integrating meter 7 through the electric wire insertion hole 13a, and electrically connected to the load side of the main switch 2, is connected to the upper equipment mounting plate. 15, and the voltage of the main circuit 1 is inputted to each power integrator 7 from this terminal block 22.

This individual power integrator 7 has an input voltage and current detector 6
The power is integrated based on the sum of the current outputs and the power integration is displayed.

This power integration display is a power integration display of the branch circuit 3 with the current detector 6 connected to the power integration meter 7 interposed therebetween.

This left box body 9 stores equipment through a door 9b with the handle operating section 5b of the branch switch 5 and the handle operating section 2a of the main switch 2 protruding from the window hole 9a.

Therefore, if - the user's branch switch 5 is used as another user's branch switch 5, that is, - the user's branch circuit 3 is used as another user's branch circuit 3, then the branch circuit This is possible by changing the connection of the secondary output terminal 6g of the current detector 6 located between the power integrators 7 of one user and the power integrators 7 of another user.

Therefore, it is possible to simply change the connection to the current detector 6 without making any major changes to the pre-installed devices such as the master switch 2, main switch 16, branch switch 5, current detector 6, etc. As a result, it is possible to measure the integrated power in each branch circuit 3 group, creating a flexible distribution board, and allowing the branch switch 5 and current detector 6, that is, the branch circuit 3, to have sufficient margin. It is possible to create a moderately sized distribution board without requiring additional equipment in terms of design and construction.

Further, the current detector 6 is made to correspond to the width dimension in the vertical direction of the branch switch 5 by an integral multiple of each other, and
The branch switch 5 has approximately the same shape or a smaller shape, the mounting means of the branch switch 5 is substantially the same, and the outer shell is substantially the same and can be replaced with the branch switch 5. Therefore, the current detector can be installed in the installation space of the branch switch 5. Since the current detector 6 can be installed alongside the branch switch 5, the connection between the two can be simplified, and the installation location can be set arbitrarily in relation to the branch switch 5, making the most of the space in the distribution board. This makes it easy to use and design and construct the distribution board.

Furthermore, in one embodiment, live wires 1a, lb and neutral wire 1c
Although the power integration device for the distribution line that supplies the voltage between live wires 1a and 1b to the load is shown, one embodiment is based on FIG. The description will be given with the same reference numerals as .

That is, to supply power to the load, a two-pole branch switch 5 is connected to the live wires 1a and 1b, and power is supplied to the load via the two current detectors 6 to the branch switch 5. .

The secondary windings 6b of these two current detectors 6 are connected in parallel with the secondary windings 6b of different current detectors 6 for each live wire 1a, 1h, and input to the power integrator 7. , the power will be integrated.

Moreover, if the configuration applied to the distribution board shown in FIGS. 4 and 5 using the power integration device for the distribution line shown in FIG. 6 is explained based on FIG. 7 which shows a different embodiment, the branch The switch 5 is of a bipolar type with a connected operating handle 5f, and its outer shell has the same vertical width dimension L2 as the current detector 6. Current detectors 6 are placed above and below the branch switch 5. will be equipped.

One side of the branch bar 19 connected to the branch switch 5 is connected to the main par 16 of the live wire 1a, and the other side is connected to the main par 16 of the live wire 1b.

In each embodiment, the branch circuit 3 is equipped with the current detector 6 independently of the branch switch 5, but the current detector 6 may of course be built into the branch switch 5.

Further, if necessary, when the branch switch 5 is used as an overcurrent protection circuit breaker, it can also be used in common with a current detector that detects the breaking current.

In each embodiment, the sum of the outputs of the current detector 6 is determined by the live wire 1a.
, 1b and input it to the power integrator 7, but the live wire 1
It is also possible to calculate the vector sum of both a and 1b and input it to the power integrator 7 without separating them.

Furthermore, although a current transformer is used as the current detector 6, the current detector 6 may be one that detects the current by detecting a voltage drop, and is not limited thereto.

〔Effect of the invention〕

The power integration device for a distribution line according to claim (1) of the present invention includes:
A current detector is interposed in each branch circuit, the sum of the current outputs of the two plurality of current detectors is taken out, and this current output sum is inputted to an integrating wattmeter that inputs the voltage of the main circuit and calculates the power integration. Therefore, since the sum of the current outputs of the current detectors installed in each branch circuit indicates the supply current of that branch circuit group, it is possible to measure the integrated power of each branch circuit by connecting it to a current detector. Branch circuits can be repurposed as needed without major changes to electric wires.
It can be done with flexibility.

Furthermore, the power integration device for a power distribution line according to claim (2),
The current detector is a current transformer with a branch circuit as the primary winding, and the secondary windings of this current transformer are connected in parallel to add up the output, and the sum of the current outputs of the current detectors is obtained. term (
In addition to 1), since the secondary winding of the current transformer can be connected in parallel, it is possible to simplify the connection to the integrating wattmeter, and also to the current detector for the branch circuit that requires power integrating calculations. It is something that can be done.

Further, the distribution board according to claim (3) has a current detector electrically connected in series with the branch switch, inputs the sum of the current output of this current detector, and inputs the applied voltage of the main switch. Since the integrated wattmeter that performs power integration calculations is housed in the box, it is possible to easily calculate the current In response to changes in the connection to the detector, integrated power measurement in each branch circuit group will be handled, creating a flexible distribution board and branch switches and current detectors with sufficient margin. In other words, it does not require branch circuit equipment in terms of design and construction, and can be made to an appropriate size.

Moreover, in the distribution board according to claim (4), the outer shell of the current detector is made to be substantially the same outer shell as that which can be replaced with the branch switch. A current detector can be installed in the installation space, and connecting the current detector with a branch switch simplifies the connection between the two.In addition, the installation location can be set arbitrarily in relation to the branch switch, and it can be installed in the distribution board. This allows for effective use of space and easy design and construction of distribution boards.

[Brief explanation of the drawing]

Fig. 1 is a circuit diagram showing an embodiment of the power integration device for distribution lines of the present invention, Fig. 2 is a circuit diagram of the main part of Fig. 1, and Fig. 3 shows the power integration principle of Fig. 1. The circuit diagram shown in FIG. 4 is a front view showing an embodiment of a distribution board using the power integration device for power distribution lines shown in FIG. 1, and FIG. FIG. 6 is a circuit diagram showing another embodiment of the power integration device for power distribution lines of the present invention, FIG. 7 is a perspective view of main parts showing another embodiment of the distribution board of the present invention, and FIG. , which is a conventional circuit diagram.

Claims (1)

[Scope of Claims] (1) In a distribution line consisting of a main circuit with a main switch interposed therebetween and a plurality of branch circuits with branch switches branched from this main circuit, each branch A feature is that a current detector is interposed in each circuit, the sum of the current outputs of the plurality of current detectors is taken out, and this sum of current outputs is input to an integrating wattmeter that inputs the voltage of the main circuit and calculates the power integration. Power integration device for distribution lines. (2) The current detector was a current transformer with a branch circuit as the primary winding, and the secondary windings of this current transformer were connected in parallel to add up the output, and the sum of the current outputs of the current detectors was calculated. The power integrating device for a distribution line according to claim 1, characterized in that: (3) A main switch that connects the external lead-in wire to the box,
In a distribution board that houses a main bar hanging from this main switch and a plurality of branch switches located on both sides of this main bar to connect external lead wires that are electrically connected to the main bar, A current detector electrically connected in series to the branch switch, and an integrating wattmeter that inputs the sum of the current outputs of the current detector and also inputs the applied voltage of the main switch to calculate power integration. A distribution board characterized by being housed in a box. (4) The distribution board according to claim (3), characterized in that the outer shell of the current detector is substantially the same outer shell that can be replaced with a branch switch.