JP7233355B2 - Mounting terminal block for circuit breaker - Google Patents

Description

TECHNICAL FIELD The present invention relates to a mounting terminal block for a circuit breaker that cuts off an electric circuit between a power supply device and a load device when an overcurrent flows in the electric circuit.

In recent years, there has been a desire to monitor the energy consumption of loads and record trends in energy consumption in loads. In addition, in order to improve the maintainability of electrical equipment, there is an increasing demand for the display of the current value of the short-circuit current or over-current or the alarm of the short-circuit current or over-current when a short-circuit current or over-current flows due to an abnormality in the load device. there is

If these demands are realized by combining dedicated sensors and measuring devices, the number of devices in the distribution board where the circuit breaker is placed will increase, which may increase the size of the distribution board and impair the workability. be. Therefore, there is a certain need for a circuit breaker with a measurement function, such as the circuit breaker described in Patent Document 1, in which a current sensor that detects the current flowing in the electric circuit between the power supply device and the load device is arranged inside. are gathering.

JP-A-10-302603

However, since the current sensor has a size that cannot be ignored compared to the size of the circuit breaker, it is difficult to miniaturize the circuit breaker if the measurement function is built into the circuit breaker. Therefore, it is desirable to be able to measure the current flowing through the electric circuit without incorporating a current sensor in the circuit breaker. This also applies to circuit breakers that are not located within the distribution board.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a mounting terminal block for a circuit breaker capable of measuring the current flowing in an electric circuit.

In order to solve the above-described problems and achieve the object, a mounting terminal block for a circuit breaker according to the present invention includes a plurality of power supply side conductors, a plurality of load side conductors, a plurality of current sensors, and a measurement processing section. , provided. The plurality of power supply-side conductors are connected to the corresponding power supply-side connection terminals among the plurality of power supply-side connection terminals of a circuit breaker that cuts off the electric path when an overcurrent flows in the electric path between the power supply and the load. be done. The plurality of load-side conductors are respectively connected to corresponding load-side connection terminals among the plurality of load-side connection terminals of the circuit breaker. The plurality of current sensors each output a signal corresponding to a current flowing between a corresponding power supply side conductor among the plurality of power supply side conductors and a corresponding load side conductor among the plurality of load side conductors. The measurement processing unit measures the current flowing through the electric circuit based on the signal output from each of the plurality of current sensors. The plurality of power supply-side conductors are arranged along the first direction. A plurality of load-side conductors are arranged along the first direction. The plurality of power-side conductors and the plurality of load-side conductors are opposed to each other in a second direction orthogonal to or crossing the first direction. Each of the plurality of current sensors is arranged on a conductor in which no other current sensor is arranged on an adjacent conductor in the first direction of the corresponding power-side conductor and the corresponding load-side conductor.

ADVANTAGE OF THE INVENTION According to this invention, it is effective in the ability to measure the electric current which flows into an electric circuit.

1 is an external perspective view of a circuit breaker and an attached terminal block according to Embodiment 1 of the present invention; FIG. 3 is a diagram showing an example of the relationship between the mounting terminal block and the distribution board according to the first embodiment; Front view of mounting terminal block according to the first embodiment A diagram showing an example of the connection relationship between the voltage sensor and load-side conductors according to the first embodiment. Cross-sectional view along the V-V line shown in Fig. 3 FIG. 4 is a diagram for explaining the relationship between the attached terminal block and the circuit breaker according to the first embodiment; FIG. 4 is a diagram for explaining the relationship between the attached terminal block and the circuit breaker according to the first embodiment; FIG. 4 shows another example of the mounting terminal block according to the first embodiment; FIG. 4 shows still another example of the mounting terminal block according to the first embodiment;

EMBODIMENT OF THE INVENTION Below, the mounting terminal block for circuit breakers concerning embodiment of this invention is demonstrated in detail based on drawing. In addition, this invention is not limited by this embodiment.

Embodiment 1.
FIG. 1 is an external perspective view of a circuit breaker and an attached terminal block according to Embodiment 1 of the present invention. As shown in FIG. 1, the mounting terminal block 20 according to the first embodiment is a mounting terminal block for the circuit breaker 10. As shown in FIG.

The circuit breaker 10 is provided in an electric circuit between a power supply device (not shown) and a load device (not shown), and connects or disconnects the electric circuit. The circuit breaker 10 is, for example, a wiring breaker or an earth leakage breaker. A circuit breaker for wiring opens an electric circuit from a closed state when an overcurrent or a short-circuit current flows in the electric circuit. A ground fault circuit breaker opens an electric circuit from a closed state when overcurrent, short-circuit current, or leakage current flows in the electric circuit.

An operation handle 11 is provided on the front side of the circuit breaker 10 to be operated to manually connect and disconnect the electric circuit. Further, on the back side of the circuit breaker 10, a plurality of power supply side connection terminals 13a, 13b, 13c electrically connected to a power supply device (not shown) and a plurality of terminals electrically connected to a load device (not shown) are provided. load side connection terminals 14a, 14b, 14c are provided. The power supply connection terminals 13a, 13b, 13c and the load connection terminals 14a, 14b, 14c are, for example, plug-in connection terminals.

The mounting terminal block 20 includes a housing 30 made of an insulating material, a plurality of power supply side conductors 41a, 41b, 41c and a plurality of load side conductors 42a, 42b, 42c, each partially protruding from the housing 30. Prepare. The power-side conductor 41a is connected to the power-side connection terminal 13a, the power-side conductor 41b is connected to the power-side connection terminal 13b, and the power-side conductor 41c is connected to the power-side connection terminal 13c. The load-side conductor 42a is connected to the load-side connection terminal 14a, the load-side conductor 42b is connected to the load-side connection terminal 14b, and the load-side conductor 42c is connected to the load-side connection terminal 14c.

Hereinafter, when each of the plurality of power supply side conductors 41a, 41b, 41c is not individually distinguished, it may be described as the power supply side conductor 41, and each of the plurality of load side conductors 42a, 42b, 42c is not individually distinguished. In some cases, it may be described as a load-side conductor 42 . The power-side conductor 41 and the load-side conductor 42 have a thickness equivalent to, for example, a busbar.

The housing 30 includes a body portion 31 that accommodates a portion of the plurality of power-side conductors 41a, 41b, and 41c and a portion of the plurality of load-side conductors 42a, 42b, and 42c, and a rear side of the circuit breaker 10. A recessed accommodation portion 32 is provided to accommodate a portion. A portion of the plurality of power supply side conductors 41a, 41b, 41c and a portion of the plurality of load side conductors 42a, 42b, 42c protrude from the front surface of the housing portion 32 facing the rear surface of the circuit breaker 10. FIG. A projecting portion 33 adjacent to the accommodating portion 32 is provided on the front side of the housing 30 . A pair of protruding portions 34 that protrude from the back portion of the main body portion 31 are provided on the back side of the housing 30 .

The plurality of power-side conductors 41 a , 41 b , 41 c are detachably connected to power-side connection terminals 13 a , 13 b , 13 c provided on the back surface of the circuit breaker 10 . A plurality of load-side conductors 42 a , 42 b , 42 c are detachably connected to load-side connection terminals 14 a , 14 b , 14 c provided on the circuit breaker 10 .

FIG. 2 is a diagram illustrating an example of a relationship between an attached terminal block and a distribution board according to the first embodiment; In the example shown in FIG. 2 , the mounting terminal block 20 is mounted on the mounting plate 2 inside the distribution board 1 . The mounting plate 2 is provided with a pair of openings 2c. The mounting terminal block 20 is mounted on the mounting plate 2 by inserting the pair of protrusions 34 into the pair of openings 2c. When the mounting terminal block 20 is attached to the mounting plate 2, part of the pair of protruding portions 34 protrudes from the rear surface 2b of the mounting plate 2, and the accommodating portion 32 extends toward the front surface 2a of the mounting plate 2. To position.

3 is a front view of the mounting terminal block according to the first embodiment; FIG. As shown in FIG. 3 , current sensors 50 a , 50 b , 50 c , voltage sensors 51 a , 51 b , and a measurement processing unit 53 are provided inside the housing 30 of the mounting terminal block 20 . Also, the plurality of power supply-side conductors 41a, 41b, 41c are arranged in the horizontal direction in FIG. A plurality of load-side conductors 42a, 42b, 42c are arranged in the horizontal direction in FIG.

The plurality of power-side conductors 41a, 41b, 41c and the plurality of load-side conductors 42a, 42b, 42c face each other in the vertical direction in FIG. The arrangement relationship between the plurality of power supply side conductors 41a, 41b, 41c and the plurality of load side conductors 42a, 42b, 42c is not limited to the arrangement in which they face each other in the vertical direction in FIG. It may be arranged to That is, the plurality of power-side conductors 41a, 41b, 41c and the plurality of load-side conductors 42a, 42b, 42c may be arranged in the horizontal direction at offset positions.

The current sensor 50a outputs a current signal or a voltage signal having a waveform corresponding to the waveform of the current flowing between the power supply side conductor 41a and the load side conductor 42a. The current sensor 50b outputs a current signal or a voltage signal having a waveform corresponding to the waveform of the current flowing between the power-side conductor 41b and the load-side conductor 42b. The current sensor 50c outputs a current signal or voltage signal having a waveform corresponding to the waveform of the current flowing between the power supply side conductor 41c and the load side conductor 42c.

Each current sensor 50a, 50b, 50c is, for example, a current transformer that converts the current flowing between the power supply side conductor 41 and the load side conductor 42 into a current signal that is a signal of a current smaller than the current, It is also called a CT (Current Transformer). Note that the current sensors 50a, 50b, and 50c are not limited to current transformers, and may be Hall elements or the like. Hereinafter, the current sensors 50a, 50b, and 50c may be referred to as the current sensor 50 when they are indicated without distinguishing between them.

The current sensor 50a is formed in a ring shape, and is arranged inside the housing 30 in a state in which it is inserted into the load-side conductor 42a so that the opening surrounds the load-side conductor 42a. The current sensor 50b is formed in a ring shape, and is arranged inside the housing 30 in a state in which it is inserted into the power-side conductor 41b so that the opening surrounds the power-side conductor 41b. The current sensor 50c is formed in a ring shape, and is arranged inside the housing 30 in a state in which it is inserted into the load-side conductor 42c so that the opening surrounds the load-side conductor 42c.

Thus, the current sensor 50a is arranged on the load-side conductor 42a adjacent to the load-side conductor 42b where no other current sensor 50 is arranged. Also, the current sensor 50b is arranged on the power supply side conductor 41b adjacent to the power supply side conductors 41a and 41c where the other current sensors 50 are not arranged. Also, the current sensor 50c is arranged on the load-side conductor 42c adjacent to the load-side conductor 42b where no other current sensor 50 is arranged. In this manner, the current sensors 50a, 50b, and 50c are alternately arranged on the power supply side conductor 41 and the load side conductor 42 so as not to be arranged continuously with conductors adjacent in the left-right direction.

As a result, each of the current sensors 50a, 50b, 50c is arranged on a conductor in which the other current sensor 50 is not arranged on an adjacent conductor in the left-right direction. Therefore, the mounting terminal block 20 is used when mounting a plurality of current sensors 50a, 50b, 50c to a plurality of power supply side conductors 41a, 41b, 41c, or when mounting a plurality of current sensors 50a, 50b, 50c to a plurality of load side conductors 42a, 41c. Compared to the case of attaching to 42b and 42c, it is possible to suppress the width in the left-right direction shown in FIG. 3 from increasing. Hereinafter, the current sensors 50a, 50b, and 50c may be referred to as the current sensor 50 when they are shown without distinction.

The voltage sensors 51a and 51b are, for example, transformers that convert the voltage between the power supply side conductor 41 or the load side conductor 42 into a voltage signal that is a signal with a voltage smaller than the voltage. In the example shown in FIG. 3, the voltage sensors 51a and 51b convert the voltage between the power supply side conductor 41 or the load side conductor 42 into a voltage signal that is a signal with a voltage smaller than the voltage. Note that the voltage sensors 51a and 51b are not limited to transformers, and may be composed of a plurality of resistors.

4 is a diagram illustrating an example of a connection relationship between a voltage sensor and load-side conductors according to the first embodiment; FIG. As shown in FIG. 4, the voltage sensor 51a is connected to the load-side conductors 42a and 42b and outputs a voltage signal having a waveform corresponding to the waveform of the voltage between the load-side conductors 42a and 42b. As shown in FIG. 4, the voltage sensor 51b is connected to the load-side conductors 42b and 42c and outputs a voltage signal having a waveform corresponding to the waveform of the voltage between the load-side conductors 42b and 42c. Hereinafter, when the voltage sensors 51a and 51b are not distinguished from each other, they may be referred to as the voltage sensor 51 in some cases.

The measurement processing unit 53 has a processing circuit 53a connected to the current sensors 50a, 50b, 50c and the voltage sensors 51a, 51b. The processing circuit 53a receives signals output from the current sensors 50a, 50b, 50c and the voltage sensors 51a, 51b, and processes the received signals to measure current, voltage, power, and the like.

Specifically, the processing circuit 53a calculates the effective value of the current flowing between the power-side conductor 41a and the load-side conductor 42a based on the current signal or voltage signal output from the current sensor 50a. The processing circuit 53a calculates the effective value of the current flowing between the power-side conductor 41b and the load-side conductor 42b based on the current signal or voltage signal output from the current sensor 50b. The processing circuit 53a calculates the effective value of the current flowing between the power supply side conductor 41c and the load side conductor 42c based on the current signal or voltage signal output from the current sensor 50c.

The processing circuit 53a also calculates the effective value of the voltage between the load-side conductors 42a and 42b based on the voltage signal output from the voltage sensor 51a. The processing circuit 53a calculates the effective value of the voltage between the load-side conductors 42b and 42c based on the voltage signal output from the voltage sensor 51b. In addition, the processing circuit 53a calculates the power, power factor, and amount of power supplied from the power supply device to the load device based on the voltage signal output from the voltage sensor 51a and the voltage signal output from the voltage sensor 51b. calculate.

The processing circuit 53a is connected to an external display device by wire or wirelessly, transmits measurement data, which is data regarding measured current, voltage, power, etc., to the display device by wire or wirelessly, and transmits the measurement data to the display device. can be displayed.

FIG. 5 is a cross-sectional view taken along line VV shown in FIG. As shown in FIG. 5, a screw hole 43 is formed in the power-side conductor 41b, and a screw hole 44 is formed in the load-side conductor 42b. Although not shown, screw holes 43 are also formed in the power-side conductors 41a and 41c, and screw holes 44 are also formed in the load-side conductors 42a and 42c. A power-side conductor connected to a power supply device is connected to the screw hole 43 of each power-side conductor 41 by a screw (not shown). Conductors are connected by screws (not shown). The connection of the power-side conductors to the power-side conductors 41 and the connection of the load-side conductors to the load-side conductors 42 are not limited to screws.

6 and 7 are diagrams for explaining the relationship between the attached terminal block and the circuit breaker according to the first embodiment. As shown in FIG. 6, the power-side conductor 41a and the load-side conductor 42a of the mounting terminal block 20 are connected via a switch 12a provided in the circuit breaker 10, and the power-side conductor 41c of the mounting terminal block 20 is connected. The load-side conductor 42 c is connected via a switch 12 c provided in the circuit breaker 10 . 7, the power supply side conductor 41b and the load side conductor 42b of the attached terminal block 20 are connected via a switch 12b provided in the circuit breaker 10. As shown in FIG.

When the circuit breaker 10 is a wiring breaker, the switches 12a, 12b, and 12c are opened from the closed state when an overcurrent or short-circuit current flows in the electric circuit. If the circuit breaker 10 is an earth leakage breaker, the switches 12a, 12b, and 12c are opened from the closed state when overcurrent, short-circuit current, or leakage current flows in the electric circuit.

The housing 30 of the mounting terminal block 20 contains current sensors 50a, 50b, 50c, voltage sensors 51a, 51b, and a processing circuit 53a necessary for measurement. No sensors, voltage sensors, etc. are required. Therefore, the attached terminal block 20 according to the first embodiment can measure the current flowing through the electric circuit, the voltage of the electric circuit, and the like, even if it is difficult to add the measurement function to the circuit breaker 10. . Moreover, the attached terminal block 20 can measure the current flowing through the electric circuit and the voltage of the electric circuit without replacing the circuit breaker 10 without the measuring function with a circuit breaker having the measuring function. Note that the mounting terminal block 20 may have a configuration in which the voltage sensors 51a and 51b are not provided.

The attachment terminal block 20 described above is detachably attached to the 3-pole circuit breaker 10, but the attachment terminal block 20 is configured to be attached to a 2-pole circuit breaker or a 4-pole or more circuit breaker. good too. FIG. 8 is a diagram showing another example of the attached terminal block according to the first embodiment. Moreover, FIG. 9 is a diagram showing still another example of the mounting terminal block according to the first embodiment.

A mounting terminal block 20 shown in FIG. 8 is a mounting terminal block to which a two-pole circuit breaker without a measuring function is detachably mounted, and has a measuring function. This mounting terminal block 20 differs from the mounting terminal block 20 shown in FIG. 3 in that it does not have a power supply side conductor 41c, a load side conductor 42c, a current sensor 50c, and a voltage sensor 51b.

A mounting terminal block 20 shown in FIG. 9 is a mounting terminal block to which a 4-pole circuit breaker without a measuring function is detachably mounted. This attachment terminal block 20 differs from the attachment terminal block 20 shown in FIG. 3 in that it further includes a power supply side conductor 41d, a load side conductor 42d, a current sensor 50d, and a voltage sensor 51c. The current sensor 50d is connected between the power-side conductor 41d and the load-side conductor 42d, and outputs a current signal or a voltage signal according to the current flowing between the power-side conductor 41d and the load-side conductor 42d. The voltage sensor 51c outputs a voltage signal corresponding to the voltage between the load-side conductors 42c and 42d.

The current sensor 50d has the same configuration as the current sensors 50a to 50c, and outputs a voltage signal having a waveform corresponding to the waveform of the current flowing between the power supply side conductor 41d and the load side conductor 42d. The voltage sensor 51c has the same configuration as the voltage sensors 51a and 51b, and outputs a voltage signal having a waveform corresponding to the waveform of the voltage between the load-side conductors 42c and 42d. The processing circuit 53a calculates the current flowing between the power supply side conductor 41d and the load side conductor 42d based on the current signal or voltage signal output from the current sensor 50d. The processing circuit 53a calculates the voltage between the load-side conductors 42c and 42d based on the voltage signal output from the voltage sensor 51c.

The mounting terminal block 20 shown in FIG. 8 and the mounting terminal block 20 shown in FIG. 9 are, like the mounting terminal block 20 shown in FIG. Therefore, for example, even if it is difficult to add a measurement function to the circuit breaker 10, the attached terminal block 20 can measure the current flowing through the electric circuit, the voltage of the electric circuit, and the like. Moreover, the attached terminal block 20 can measure the current flowing through the electric circuit and the voltage of the electric circuit without replacing the circuit breaker 10 without the measuring function with a circuit breaker having the measuring function. In the example described above, the voltage sensor 51 detects the voltages between the load-side conductors 42, but detects the voltages between the power-source-side conductors 41 instead of the voltages between the load-side conductors 42. may be arranged as

As described above, the mounting terminal block 20 according to the first embodiment includes the plurality of power supply side conductors 41 , the plurality of load side conductors 42 , the plurality of current sensors 50 and the measurement processing section 53 . Each of the plurality of power supply-side conductors 41 is connected to the corresponding power supply side of the plurality of power supply side connection terminals 13 of the circuit breaker 10 for breaking the electric path when an overcurrent flows in the electric path between the power supply and the load device. connected to the connection terminal. Each of the plurality of load-side conductors 42 is connected to a corresponding load-side connection terminal among the plurality of load-side connection terminals 14 of the circuit breaker 10 . The current sensor 50 detects a current flowing between a corresponding power supply side conductor among the plurality of power supply side conductors 41 and a corresponding load side conductor among the plurality of load side conductors 42 . The measurement processing unit 53 measures the current flowing through the electric circuit based on the signal output from each of the plurality of current sensors 50 . Thereby, even if the circuit breaker 10 without a measuring function is arranged in the distribution board 1, the attached terminal block 20 can measure the current flowing through the electric circuit. Moreover, by using the attached terminal block 20, the current can be measured without replacing the circuit breaker 10 without the measuring function with a circuit breaker with the measuring function.

Also, the plurality of power supply-side conductors 41 are arranged along the first direction. A plurality of load-side conductors 42 are arranged along the first direction. In the examples shown in FIGS. 3, 8, or 9, the first direction is the horizontal direction in the drawing. The plurality of power supply-side conductors 41 and the plurality of load-side conductors 42 face each other in a second direction orthogonal to or crossing the first direction. In the examples shown in FIGS. 3, 8, or 9, the second direction is the vertical direction in the drawing. Each of the plurality of current sensors 50 is arranged on a conductor of the corresponding power supply side conductor 41 and the corresponding load side conductor 42 where no other current sensor 50 is arranged on the adjacent conductor in the first direction. As a result, the attached terminal block 20 can be prevented from increasing in length in the first direction, and can be miniaturized.

The mounting terminal block 20 also includes voltage sensors 51 a and 51 b that output signals corresponding to voltages between the plurality of power-side conductors 41 or voltages between the plurality of load-side conductors 42 . The measurement processing unit 53 measures the voltage of the electric circuit based on the signals output from the voltage sensors 51a and 51b. As a result, the mounting terminal block 20 can measure the voltage of the electric circuit even when the circuit breaker 10 having no measurement function is arranged on the distribution board 1 . Moreover, by using the mounting terminal block 20, the voltage can be measured without replacing the circuit breaker 10 having no measuring function with a circuit breaker having a measuring function.

The configuration shown in the above embodiment shows an example of the content of the present invention, and it is possible to combine it with another known technology, and one configuration can be used without departing from the scope of the present invention. It is also possible to omit or change the part.

1 distribution board 2 mounting plate 2a front surface 2b rear surface 2c opening 10 circuit breaker 11 operation handle 12a, 12b, 12c switch 13a, 13b, 13c power supply side connection terminal 14a, 14b, 14c load-side connection terminal, 20 mounting terminal block, 30 housing, 31 main body, 32 housing, 33, 34 projecting portion, 41, 41a, 41b, 41c, 41d power supply-side conductor, 42, 42a, 42b, 42c, 42d load side conductor, 43, 44 screw hole, 50, 50a, 50b, 50c, 50d current sensor, 51, 51a, 51b, 51c voltage sensor, 53 measurement processing section, 53a processing circuit.

Claims (2)

A plurality of power supply side terminals respectively connected to corresponding power supply side connection terminals among a plurality of power supply side connection terminals of a circuit breaker that cuts off an electric path between a power supply device and a load device when an overcurrent flows in the electric path. a conductor;
a plurality of load-side conductors respectively connected to corresponding load-side connection terminals among the plurality of load-side connection terminals of the circuit breaker;
a plurality of current sensors each outputting a signal corresponding to a current flowing between a corresponding power-side conductor of the plurality of power-source-side conductors and a corresponding load-side conductor of the plurality of load-side conductors;
a measurement processing unit that measures the current flowing in the electric circuit based on the signal output from each of the plurality of current sensors ,
The plurality of power supply-side conductors are arranged along a first direction,
The plurality of load-side conductors are arranged along the first direction,
the plurality of power supply-side conductors and the plurality of load-side conductors face each other in a second direction perpendicular to or crossing the first direction;
each of the plurality of current sensors,
The current sensor is arranged on a conductor, of the corresponding power supply side conductor and the corresponding load side conductor, where no other current sensor is arranged on the conductor adjacent in the first direction.
A mounting terminal block for a circuit breaker, characterized by: at least one voltage sensor that outputs a signal corresponding to the voltage between the plurality of power supply side conductors or the voltage between the plurality of load side conductors;
The measurement processing unit
The mounting terminal block for a circuit breaker according to claim 1 , wherein the voltage of the electric circuit is measured based on the signal output from the at least one voltage sensor.

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