JP4986962B2 - Energization information display device - Google Patents

Description

  The present invention relates to an energization information display device for measuring and displaying energization information such as current flowing through an electric circuit, voltage applied to the electric circuit, and leakage current flowing through the electric circuit, and more particularly, a circuit breaker type energization used in a circuit breaker for power distribution. The present invention relates to an information display device.

When detecting and displaying energization information flowing in the electrical path in the switchboard, a circuit breaker-type energization information display device (electronic watt-hour meter) is arranged in series with the circuit breaker disposed in the electrical path. The information display device and the circuit breaker are connected by screwing with an electric wire etc., and the current and current information such as the effective value of voltage and current, electric power, electric energy and power factor are displayed on the display device. .
A conventional circuit breaker-type electronic watt-hour meter has, for example, a container that houses an electronic watt-hour meter body, and a lid that covers the opening of the container and includes a display unit. With a connection to the power source, and a connection to the load on the other side facing each other. Each connection is configured by holding a connection terminal for each phase in a terminal recess provided at the end of the container. (For example, refer to Patent Document 1).

JP 2003-28897 A (page 3, FIG. 1)

  In the case of a circuit breaker type energization information display device (electronic watt-hour meter), the energization information display device is disposed outside the switchboard in addition to being disposed within the switchboard (including the distribution board). In either case, the circuit breaker (or electric circuit) and the energization information display device are used by being connected by a conductor. When using the conventional electronic watt-hour meter as shown in Patent Document 1 in the switchboard, the connection terminal on the load side of the circuit breaker and the connection terminal on the one end side of the electronic watt-hour meter Are connected via a connection conductor such as an electric wire or a bus bar. For this reason, there are two fastening points, and it takes time for connection work, and a space for the connection conductor is required between the circuit breaker and the electronic watt-hour meter, and the space in the switchboard is probably narrowed. There was a point.

  The present invention was made to solve the above-mentioned problems, and can be connected to the inside of the switchboard and outside the switchboard, and when arranged in the switchboard, the connection conductor is not required. An object of the present invention is to provide an energization information display device that facilitates work and saves installation space.

  An energization information display device according to the present invention includes a measuring unit that measures energization information of an electric circuit, a casing that houses the measuring unit, and a display that is disposed on the front surface of the casing and displays the energization information measured by the measuring unit. Unit, a flat plate-like input side connection terminal projecting from one end of the side of the housing, an output side connection terminal provided at the other end, and a terminal block for holding the input side connection terminal In the information display device, the terminal block has the input side connection terminal inserted into the terminal recess formed on the holding surface and fixed with the tightening screw, and is attached to the input side connection terminal and the housing. It is configured to be removable by removing and pulling out the input side connection terminal.

According to the energization information display device of the present invention, the terminal block that holds the input side connection terminal is configured to be detachable from the input side connection terminal and the housing. It can be installed at any place, and when the terminal block is removed, the input side connection terminal protrudes, so that it can be directly connected to the circuit breaker in the switchboard. Therefore, when it is arranged in the switchboard, no connection conductor is required, so that the connection work is simplified and the installation space can be saved.

Embodiment 1 FIG.
FIG. 1 is a perspective view of an energization information display device according to Embodiment 1, and FIG. 2 is a front view of FIG. However, FIG. 2 shows a state in which the front display unit is removed. FIG. 3 is a block diagram showing a configuration of the energization information display device of FIG. FIG. 4 is a perspective view for explaining attachment and detachment of the terminal block of FIG.

  1 and 2, the energization information display device 1 accommodates measurement means 2 (details will be described later) for measuring energization information such as effective values of voltage and current, power, electric energy, and power factor, and the measurement means 2. Display unit 4 for displaying the amount of electricity measured by the measuring means 2 and inputting calculation conditions and control conditions, and the input side connected to the electric circuit 9 (see FIG. 3) to be measured A connection terminal 5, a terminal block 6 that is detachably attached to the input side connection terminal 5 and the housing 3, a tightening screw 7 that tightens the input side connection terminal 5 to the terminal block 6, and an output side connection terminal 8. It is configured.

  As shown in FIG. 2, the output side connection terminal 8 for connecting to the load side electric circuit is on the side opposite to the input side connection terminal 5 on the side surface of the housing 3, and faces the input side connection terminal 5. The connection terminals 5 and 8 are electrically connected inside the housing 3. Since FIGS. 1 and 2 show the case of three phases, there are three connection terminals 5 and 8 each, but in the case of a single phase, there are two each.

Details of the inside of the measuring means 2 and the display unit 3 will be described with reference to the block diagram of FIG.
Since the measuring means 2 takes in information from the input side connection terminal 5 connected to the electric circuit 9, a voltage proportional to the current flowing through the primary side (conductor connecting the input side connection terminal 5 and the output side connection terminal 8) is obtained. An output current detector 2a, a voltage detector 2b that outputs a voltage proportional to the voltage applied to the primary side, and a leakage detector 2c that outputs a voltage proportional to the leakage current flowing to the primary side, A filter / amplifier 2d that removes unnecessary harmonic components of the voltages detected in 2a to 2c and amplifies them to a necessary amplitude, and obtains necessary data by taking the amplified waveform by A / D conversion and processing it. The calculation / processing unit 2e includes an input / output unit 2f for inputting external contact information and outputting alarm information / integrated power amount pulse information to the outside.

  The display unit 4 includes a 7-segment display unit 4a and a 7-segment display unit 4a that display energization information such as effective values of voltage and current, power, electric energy, and power factor calculated by the calculation / processing unit 2e of the measuring unit 2. LED display unit 4b for displaying numerical elements and display conditions displayed in the above and the state of the apparatus, and a button input unit 4c for inputting switching of elements displayed on the display unit 4, selection of setting items, and determination of setting conditions. It is composed of The actual arrangement is as shown in the display section 4 of FIG.

Next, with reference to FIG. 4, the details of the detachable terminal block which is a feature of the present invention will be described. The figure shows a state in which the terminal block 6 and the front display unit 4 are removed.
The input side connection terminal 5 has a flat plate shape and projects from one end of the side surface of the housing 3. The input side connection terminal 5 is provided with a through hole 5a for connecting to the terminal block 6 with a tightening screw 7 in the center, and for fitting and locking the terminal block 6 on both sides of the root portion. A fitting recess 5b is provided, and tapered portions 5c for facilitating mounting on the terminal block 6 or a connection portion of a circuit breaker described later are formed at both corners on the distal end side. An R portion may be used instead of the tapered portion.

The terminal block 6 includes terminal recesses 6a formed on the holding surface on the side where the input side connection terminals 5 are held, partition walls 6b formed on both sides thereof, and the input side connection terminals 5 by fastening screws 7. A female thread portion 6c (for example, configured by embedding a nut) for fixing, and a fitting convex portion 6d for fitting and holding the fitting concave portion 5b of the input side connection terminal 5 described above. , An engagement protrusion 6e that engages with an engagement groove 3a provided in the housing 3, and a mounting through hole 6f. Further, a mounting through hole 3b is also provided on the side of the housing 3 having the output side connection terminal 8.
Note that the above-described engaging protrusions 6e and engaging grooves 3a provided on the mounting surfaces of the terminal block 6 and the housing 3 are opposite to the drawing, and are engaged on the terminal block 6 side and on the housing 3 side. A mating protrusion may be provided.

  Next, the operation of mounting the terminal block 6 on the housing 3 will be described with reference to FIG. The terminal block 6 is moved in the direction of arrow A, and the input side connection terminal 5 is inserted into the terminal recess 6 a of the terminal block 6. At this time, after the taper portion 5c formed at the tip corner portion of the input side connection terminal 5 is brought into contact with the fitting convex portion 6d of the terminal block 6, when the terminal block 6 is further pressed in the arrow A direction, the fitting convex portion When 6d is plastically deformed, the input side connection terminal 5 is fitted into the terminal concave portion 6a while sliding, and the fitting convex portion 6d and the fitting concave portion 5b are fitted and locked at the final end. In conjunction with this step, the engaging protrusion 6 e protruding from the terminal block 6 engages with the engaging groove 3 a recessed from the housing 3. Next, the terminal block 6 is fixed to the housing 3 by passing the tightening screw 7 through the through-hole 5a and screwed into the female screw portion 6c, and the mounting is completed. The terminal block 6, the input side connection terminal 5, and the housing 3 is integrated (state of FIG. 1).

When removing the terminal block 6 from the housing | casing 3, contrary to said process, the fastening screw 7 is loosened and removed. At this time, the terminal block 6 and the input side connection terminal 5 are locked by fitting the fitting recess 5b and the fitting projection 6d, and the terminal block 6 and the housing 3 are engaging protrusions. Since it is engaged with 6e and the engaging groove 3a, it is held in a temporarily fixed state. By pulling out the terminal block 6 by applying a force in the direction opposite to the arrow A, the fitting convex portion 6d is plastically deformed to disengage from the terminal concave portion 6a of the input side connection terminal 5, and the removal is completed.
As described above, since the terminal block 6 is held in a temporarily fixed state with the tightening screw 7 removed, the connection is facilitated when a conductor is connected to the input side connection terminal 5.

As described above, the energization information display device according to the present embodiment is configured so that the terminal block 6 holding the input-side connection terminal 5 can be easily attached and detached. It can be freely arranged in the vicinity of the electric circuit to be measured outside the switchboard. In this case, the mounting through holes 6f and 3b are used to fix the bolts in place by bolting or the like. What is necessary is just to connect between the electricity supply information display apparatus 1 and the electric circuit (or apparatus) of measurement object with an electric wire or a bus bar.
On the other hand, when installed in a switchboard and used in combination with a power distribution breaker, the terminal block 6 is removed and installed as follows.

FIG. 5 is a diagram illustrating a state in which the energization information display device 1 is attached to a circuit breaker and used in a switchboard, for example. However, the display part 4 has shown the removed state.
As shown in the figure, the circuit breaker 20 disposed in the switchboard has a power supply side terminal 20a connected to a circuit 21 for supplying electricity to the circuit breaker 20 from the upper level. Then, the input side connection terminal 5 of the energization information display device 1 with the terminal block 6 removed is fastened and fixed to the load side terminal 20 b for energizing the circuit breaker 20 from the lower side by using the tightening screw 7. At this time, since the taper portions 5c are formed on both ends of the tip of the input side connection terminal 5, it can be easily inserted and connected to the mounting position of the load side terminal 20b of the circuit breaker 20. When connecting the load-side conductor to the output-side connection terminal 8 of the energization information display device 1, the operation is performed with the front display unit 4 removed.

  The operation of the energization information display device 1 combined as described above will be briefly described. As described with reference to FIG. 3, the detection signals of the current detection unit 2a, the voltage detection unit 2b, and the leakage detection unit 2c provided between the input side connection terminal 5 and the output side connection terminal 8 are calculated through the filter / amplification unit 2d. The result is sent to the processing unit 2e, and the calculation result is displayed on the 7-segment display unit 4a or the LED display unit 4b of the display unit 4. Also, calculation conditions / control conditions are input from the button input unit 4c, and the calculation / processing unit 2e performs an operation in accordance with the input conditions.

FIG. 6 is an image diagram of a switchboard (distribution panel) in which the energization information display device 1 according to the present embodiment is installed.
A main circuit breaker 24 is disposed at the base end of the main bar 23 disposed in the distribution board 22, and a branch bar 25 is connected in both directions orthogonal to the main bar 23. A branch circuit breaker 26 is connected to the branch bar 25. , 27 are arranged, and power is distributed from the branch breakers 26, 27 to each electrical facility. In order to obtain energization information for each electric facility as a stable power supply and energy saving measure, the main circuit breaker 24 and branch circuit breakers 26 and 27 (selected as necessary. In the figure, two branch circuit breakers 26 are selected. The energization information display device 1 is attached. The energization information display apparatus 1 attaches the input side connection terminal 5 directly to the load side terminal of each circuit breaker with the terminal block 6 removed. As a result, the mounting is simplified and the installation space in the distribution board 22 can be reduced, so that the distribution board can be reduced in size.
Needless to say, even in the case of installation in the panel, if the circuit breaker is not directly connected, it may be installed with a terminal block.

  As described above, according to the energization information display device of the present embodiment, the terminal block that holds the input side connection terminal is configured to be detachable from the input side connection terminal and the housing, so that the terminal block is mounted. Then, it can be installed in any place regardless of the inside or outside of the switchboard, and when the terminal block is removed, the input side connection terminal protrudes, so that it can be directly connected to the circuit breaker in the switchboard. Therefore, it can be connected to the inside of the switchboard and outside of the switchboard, and when it is installed inside the switchboard, the connection work is simplified because no connection conductor is required, and the installation space can be saved. Can be

  In addition, when the terminal block is mounted on the housing, the engagement protrusion provided on one side of the mounting surface is configured to engage with the engagement groove provided on the other side. When mounting, the engaging protrusion and the engaging groove are engaged to be surely positioned and easy to insert.

  Also, a fitting recess is provided on the side surface in the width direction of the input side connection terminal, a fitting protrusion is provided on the terminal block side to be fitted with the fitting recess, and the fitting is performed when the terminal block is mounted on the input side connection terminal. Since the fitting convex part and the fitting concave part are fitted and locked, the mounting can be ensured and the fastening screw is removed to connect to the electric circuit when the terminal block is mounted. Even in this case, since the terminal block is temporarily fixed to the input side connection terminal and the housing, the connection work is facilitated.

  Furthermore, since the tapered portion or the R portion is formed at both corners on the distal end side of the input side connection terminal, when the input side connection terminal is attached to the terminal block, or the input side connection terminal is connected to the terminal of the circuit breaker. In this case, the insertion into the connection portion is facilitated, and the workability of mounting or connection is improved.

It is a perspective view which shows the electricity supply information display apparatus by Embodiment 1 of this invention. It is a front view of FIG. It is a block diagram which shows the structure of the electricity supply information display apparatus of FIG. It is a perspective view explaining attachment or detachment of the terminal block of FIG. It is an external view which shows the state which attached the electricity supply information display apparatus of FIG. 1 directly to the circuit breaker. It is an image figure of the distribution board in which the electricity supply information display apparatus of this invention was installed.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Current supply information display apparatus 2 Measuring means 2a Current detection part 2b Voltage detection part 2c Leakage detection part 2d Filter / amplification part 2e Calculation / processing part 2f Contact input / output part 3 Case 3a Engaging groove 3b Mounting through-hole 4 Display part 4a 7-segment display section 4b LED display section 4c Button input section 5 Input-side connection terminal 5a Through hole 5b Fitting recess 5c Taper section 6 Terminal block 6a Terminal recess 6b Bulkhead 6c Fitting projection 6e Engagement protrusion 6f Through hole for mounting 7 Clamping screw 8 Output side connection terminal 9 Electric circuit 20 Circuit breaker 20a Power supply side terminal 20b Load side terminal 21 Electric circuit 22 Distribution board 23 Main bar 24 Main circuit breaker 25 Branch bar 26, 27 Branch breaker.

Claims (4)

Measuring means for measuring energization information of the electric circuit, a casing for housing the measuring means, a display unit disposed on the front surface of the casing and displaying the energization information measured by the measuring means, and the casing An energization information display device comprising: a flat input side connection terminal projecting from one end of the side surface; an output side connection terminal provided at the other end side; and a terminal block holding the input side connection terminal. ,
The terminal block has the input-side connection terminal inserted into a terminal recess formed on a holding surface and fixed with a fastening screw, and is attached to the input-side connection terminal and the housing. The energization information display device is configured to be removable by removing the input side connection terminal after being removed.   2. The energization information display device according to claim 1, wherein when the terminal block is mounted on the housing, an engagement protrusion provided on one of the mounting surfaces is engaged with an engagement groove provided on the other. The energization information display device according to claim 1, wherein:   The energization information display device according to claim 1 or 2, wherein a fitting concave portion is provided on a side surface in the width direction of the input side connection terminal, and the fitting convex portion is fitted to the fitting concave portion on the terminal block side. When the terminal block is mounted on the input-side connection terminal, the fitting projection and the fitting depression are fitted and locked. Display device.   The energization information display device according to any one of claims 1 to 3, wherein a taper portion or an R portion is formed at both corners on the tip side of the input side connection terminal. Display device.

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