JP6847439B1 - Breaker device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a breaker device capable of contributing to setting a small rated current value. A breaker device 11 is distributed to a breaker module that cuts off energization in response to reception of a break signal, an ADCC power supply module 48 that generates DC power from an alternating current in response to energization, and an electric wire penetrating an annular core. It includes a sensor module 43 that detects a current value based on an alternating current value, and a controller module 45 that is connected to an ADCC power supply module 48 with a covered wire 52 and supplies a breaker signal to a breaker module based on the detected current value. [Selection diagram] Fig. 3

Description

The present invention is based on a circuit breaker module that cuts off energization in response to reception of a cutoff signal, an ACDC power supply module that generates DC power from an alternating current in response to energization, and an alternating current flowing through an electric wire penetrating the annular core. The present invention relates to a breaker device including a sensor module that detects a value and a controller module that supplies a breaker signal to the breaker module based on the detected current value.

Patent Document 1 discloses an electronic breaker. The rated current of the electronic breaker is set according to the power consumption of the load that operates with the introduced AC power. The interruption of energization is controlled based on the rated current. Although efficient operation is desired with a small rated current value, if the rated current value is too small with respect to the power consumption of the load, the energization is frequently cut off during the operation of the load. The load often stops. If the accuracy of the processing operation of the CPU is improved, efficient operation can be realized for a small rated current value.

Japanese Patent No. 4457379

In a generally known electronic breaker, a microcontroller (microcomputer), an ADCC power supply, and an AD converter coexist on one printed circuit board. The CPU (Central Processing Unit) of the microcontroller is exposed to the electromagnetic waves (noise) of the ADCC power supply. There is concern about CPU malfunction. Moreover, the CPU of the microcontroller is exposed to the heat of the ADCC power supply. There is concern about excessive temperature rise in the CPU. The accuracy of the processing operation of the CPU decreases in response to electromagnetic waves (noise) and heat.

It is an object of the present invention to provide a breaker device capable of contributing to the setting of a small rated current value.

According to the first aspect of the present invention, the circuit breaker module that cuts off the energization in response to the reception of the cutoff signal, the ADCC power supply module that generates DC power from the alternating current in response to the energization, and the electric wire penetrating the annular core. A sensor module that detects a current value based on the circulating alternating current and a controller module that is connected to the ADCC power supply module with a covered wire and supplies the circuit breaker signal to the breaker module based on the detected current value. A breaker device is provided.

The CPU of the controller module can be kept away from the ADCC power supply module. The CPU of the controller module can be kept away from the electromagnetic waves (noise) of the ADCC power supply module. Malfunctions of the CPU can be effectively prevented. The CPU of the controller module can be kept away from the heat of the ADCC power supply module. Efficient heat dissipation from the CPU can be realized. Excessive temperature rise can be avoided in the CPU. Such a breaker device can greatly contribute to the setting of a small rated current value.

The controller module may be connected by a covered wire to an AD converter which is incorporated in the sensor module and generates a digital signal reflecting the current value. Since the ADCC power supply module and the sensor module are each connected to the controller module by a covered wire, the degree of freedom in arranging the ADCC power supply module and the sensor module with respect to the controller module can be expanded. The AD converter of the sensor module can be kept away from the ADCC power supply module. The AD converter can be kept away from the electromagnetic waves (noise) of the ADCC power supply module. The AD converter can work well.

According to the present invention, a breaker device capable of contributing to the setting of a small rated current value can be provided.

It is a top view which shows schematic appearance of the breaker apparatus which concerns on one Embodiment of this invention. It is a top view which shows the structure in the housing schematicly. It is a top view which shows roughly the structure of the back side of a support plate. It is a perspective view which shows the arrangement of the 2nd shield plate schematicly.

Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.

FIG. 1 schematically shows the appearance of the breaker device 11 according to the embodiment of the present invention. The breaker device 11 includes, for example, a resin housing 12. The housing 12 internally partitions the accommodation space. The housing 12 has, for example, a main body 12a that is fixed to the wall of a building to form an opening 13 of the accommodation space, and a lid 12b that is coupled to the main body 12a and closes the opening 13.

Three power lines 14 drawn from an outdoor power transmission line are connected to the housing 12. The power line 14 is composed of, for example, a flexible coated wire. Three-phase AC power is supplied from the power line 14 to the breaker device 11. The power supply line 14 is color-coded into red that identifies the first phase (R), white that identifies the second phase (S), and blue that identifies the third phase (T).

A three-phase wiring 15 extending from an indoor load (electrical appliances, machine tools, etc.) is connected to the housing 12. Three-phase AC power is supplied from the wiring 15 to each load. The wiring 15 is color-coded into red that identifies the first phase (U), white that identifies the second phase (V), and blue that identifies the third phase (W), corresponding to the power supply line 14. To.

As shown in FIG. 2, the breaker device 11 includes a breaker module 18 having three input terminals 16 and three output terminals 17 connected to electric circuits individually extending from the input terminals 16. A conductive material such as a tin-plated copper plate is used for the input terminal 16 and the output terminal 17. Power lines 14 are individually coupled to the input terminals 16. A terminal fitting 19 superimposed on the input terminal 16 is coupled to the downstream end of the power line 14. A conductive material such as a tin-plated copper plate is used for the input terminal 16. The individual terminal fittings 19 are fixed to the input terminal 16 with screws 21, for example. A flexible resin colored cap 22 is attached to each terminal fitting 19. The coloring cap 22 is color-coded into red that identifies the first phase (R), white that identifies the second phase (S), and blue that identifies the third phase (T).

For example, an opening / closing contact is installed in the electric circuit of the breaker module 18. When the open / close contact opens, the power supply to the electric circuit is cut off. Energization of the electric circuit is established when the open / close contact is closed. The opening and closing contacts are physically triggered by the operation of the trip coil. A trigger signal is supplied to the trip coil from the trigger circuit when the opening / closing contact is opened. The trigger circuit outputs a trigger signal in response to the reception of the cutoff signal.

The breaker device 11 includes a terminal block module 26 having three first terminals 24 and a second terminal 25 that is individually connected to the first terminal 24 and receives the wiring 15 on the load side. A conductive material such as a tin-plated copper plate is used for the first terminal 24 and the second terminal 25. The first terminal 24 is individually connected to the output terminal 17 of the breaker module 18 by the connection line 27. The connecting wire 27 is composed of, for example, a flexible coated wire.

A terminal fitting 28 superimposed on the output terminal 17 is coupled to the upstream end of the connection line 27. A conductive material such as a tin-plated copper plate is used for the terminal fitting 28. The individual terminal fittings 28 are fixed to the output terminal 17 with screws 29, for example.

A terminal fitting 31 superimposed on the first terminal 24 is coupled to the downstream end of the connection line 27. A conductive material such as a tin-plated copper plate is used for the terminal fitting 31. The individual terminal fittings 31 are fixed to the first terminal 24 with screws 32, for example. A flexible resin colored cap 33 is attached to each terminal fitting 31. The coloring cap 33 is color-coded into red that identifies the first phase (R), white that identifies the second phase (S), and blue that identifies the third phase (T).

A terminal fitting 34 to be overlapped with the second terminal 25 is coupled to the upstream end of the wiring 15. A conductive material such as a tin-plated copper plate is used for the terminal fitting 34. The individual terminal fittings 34 are fixed to the second terminal 25 with screws 35, for example. A flexible resin colored cap 36 is attached to each terminal fitting 34. The coloring cap 36 is color-coded into red that identifies the first phase (U), white that identifies the second phase (V), and blue that identifies the third phase (W).

The breaker device 11 includes a support plate 37 made of a conductive material that commonly supports the breaker module 18 and the terminal block module 26. The support plate 37 can be formed from, for example, a stainless steel plate coated with paint. The support plate 37 is fixed to the one-wall body 38 of the housing 12 which is overlapped with the wall of the building. The support plate 37 is joined to the wall body 38 by bending from one end of the flat plate 37a which spreads in an upright posture and holds the breaker module 18 and the terminal block module 26 on the surface, and is connected between the wall body 38 and the flat plate 37a. The first standing plate 37b that secures a predetermined distance and the second standing plate 37c that is bent from the other end of the flat plate 37a and connected to the wall body 38 to secure a determined distance between the wall body 38 and the flat plate 37a. And have. The terminal block module 26 is arranged so as to be displaced in the horizontal direction (horizontal direction) from the breaker module 18. As a result, the accommodation space can be shortened in the vertical direction as compared with the case where the breaker module 18 and the terminal block module 26 are connected in the vertical direction (vertical direction).

An opening 41 is formed in the flat plate 37a below the breaker module 18. The connection line 27 enters the opening 41 from the breaker module 18 and extends upward along the back surface of the flat plate 37a in the space sandwiched between the flat plate 37a and the wall 38. A curved region that is continuous from the upper end of the first region 42a and the upper end of the second region 42b and that connects the first region 42a and the second region 42b to each other while being curved. It has 42c and. In this way, the length of the connecting line 27 can be earned. By ensuring the length of the connecting line 27, the degree of freedom of deformation of the connecting line 27 can be expanded.

The breaker device 11 includes a sensor module 43 that detects a current value based on an alternating current flowing through the connecting line 27. The sensor module 43 is attached to each individual connecting line 27 and has an annular core 43a that surrounds the connecting line 27 around the line. A coil is wound around the annular core 43a. When a current flows through the connecting line 27, the magnetic field line is guided in the annular core 43a. In response to the action of the magnetic field lines, a current is generated in the coil in proportion to the current value of the connecting line 27.

The adjacent sensor modules 43 are arranged at positions deviated from each other in the line direction L of the connecting line 27. By avoiding interference between the sensor modules 43 in this way, the distance between the connecting lines 27 can be reduced as much as possible. The flat plate 37a is formed with a small opening 44 for receiving the individual sensor modules 43.

The breaker device 11 includes a controller module 45 that supplies a break signal to the breaker module 18 based on the current value detected by the sensor module 43. The controller module 45 is composed of a PLC (programmable logic controller). The controller module 45 is connected to the flat plate 37a of the support plate 37. Here, the breaker module 18 is arranged in the first row region 46a partitioned on the surface of the flat plate 37a, and the sensor module 43 and the terminal block module 26 are partitioned in parallel on the surface of the flat plate 37a in the first row region 46a. The controller module 45 is arranged in the second row area 46b, and the controller module 45 is arranged in the third row area 46c which is partitioned in parallel with the first row area 46a and the second row area 46b on the surface of the flat plate 37a.

The controller module 45 is connected to the sensor module 43 and a central processing unit (CPU) that determines the magnitude and duration of the current value according to a determined program (sequence) and generates a cutoff signal based on the determination. It has an input unit that receives a detection signal for specifying a current value from the sensor module 43, and an output unit that is connected to the breaker module 18 and outputs a cutoff signal toward the breaker module 18. If the rated current is 30 amperes or less, the controller module 45 outputs a cutoff signal when a current of 200% or more of the rated current flows for more than 2 minutes, and a current of 125% or more of the rated current exceeds 60 minutes. When it is distributed, a cutoff signal is output. If the rated current is more than 30 amps and less than 50 amps, a cutoff signal is output when a current of 200% or more of the rated current flows for more than 4 minutes, and a current of 125% or more of the rated current exceeds 60 minutes. When it is distributed, a cutoff signal is output. If the rated current exceeds 50 amperes, a cutoff signal is output when a current of 200% or more of the rated current flows for more than 6 minutes, and a cutoff signal is output when a current of 125% or more of the rated current flows for more than 120 minutes. Is output. The value of 200% of the rated current, the value of 125%, and the value of time may be stored in a data table in the controller module 45, for example.

As shown in FIG. 3, the sensor module 43 includes an AD (analog-digital) converter 43b that enters the small opening 44 of the flat plate 37a and is arranged in a space sandwiched between the flat plate 37a and the wall 38. The AD converter 43b is integrally attached to the annular core 43a based on the resin molded body, and generates a digital signal detection signal that reflects the current value of the connection line 27. Here, the digital signal is composed of a voltage signal. The AD converter 43b and the input unit of the controller module 45 are connected to each other by a covered wire 47.

The breaker device 11 includes an ACDC (alternating current / direct current) power supply module 48 that generates direct current from an alternating current in response to energization. The ADCC power supply module 48 is fixed to the back surface of the flat plate 37a on the back side of the terminal block module 26. The ACDC power supply module 48 is connected to the output terminal 17 of the breaker module 18 by a covered wire 49. One covered wire 49 connects the 1 input terminal 51a of the ACDC power supply module 48 to the output terminal 17 (R) of the first phase. The other covered wire 49 connects the 1 input terminal 51b of the ACDC power supply module 48 to the output terminal 17 (T) of the third phase. The ACDC power supply module 48 produces 24 V DC power from, for example, 200 V AC power. The DC power is used as the operating power of the breaker module 18 and the controller module 45. The ADCC power supply module 48 and the controller module 45 are connected to each other by a covered wire 52.

The breaker device 11 includes a first shield plate 53 that separates the ADCC power supply module 48 from the annular core 43a of the sensor module 43. Here, the first shield plate 53 is formed as a portion of the flat plate 37a. Therefore, the first shield plate 53 is continuous from the support plate 37. The first shield plate 53 is superposed on one surface of the ADCC power supply module 48. The first shield plate 53 shields electromagnetic waves emitted from one surface of the ADCC power supply module 48.

The breaker device 11 includes a second shield plate 54 that separates the AD converter 43b of the sensor module 43 from the ADCC power supply module 48. Here, the second shield plate 54 can be formed by being cut up from the flat plate 37a. The small opening 44 can be formed according to the cutting and raising of the second shield plate 54. In this way, the second shield plate 54 is continuous from the support plate 37. The second shield plate 54 stands upright from the flat plate 37a. As shown in FIG. 4, the sensor module 43 can be fixed to the second shield plate 54. The second shield plate 54 is arranged between the sensor module 43 and the ADCC power supply module 48 in the space sandwiched between the flat plate 37a and the wall body 38.

As shown in FIG. 3, the breaker device 11 includes a third shield plate 55 that separates the controller module 45 from the AD converter 43b of the sensor module 43. The third shield plate 55 can be formed by being cut up from the flat plate 37a. The third shield plate 55 stands upright from the flat plate 37a. The occupied space of the controller module 45 can be secured according to the cutting and raising of the third shield plate 55. In this way, the third shield plate 55 is continuous from the support plate 37. The third shield plate 55 is superposed on one surface of the controller module 45. The third shield plate 55 is arranged between the controller module 45 and the sensor module 43 in the space sandwiched between the flat plate 37a and the wall body 38.

A fixing plate 56 continuous from the third shield plate 55 is bent and formed on the third shield plate 55. The fixing plate 56 stands upright from the third shield plate 55. The fixing plate 56 extends parallel to the flat plate 37a. The controller module 45 is fixed to the fixing plate 56. The fixing plate 56 can position the controller module 45 on the third shield plate 55.

Next, the operation of the breaker device 11 will be described. When installing the breaker device 11, the rated current [A] is determined in the breaker device 11. A 200% current value and a 125% current value are specified depending on the rated current. The permissible duration is specified depending on the individual current value. These are stored in the data table in the controller module 45. A personal computer or other input device can be connected to the input unit of the controller module 45 for storage. The installation worker inputs the determined value into the data table from the input device.

Three-phase alternating current flows through the breaker module 18 and the connection line 27 according to the operation of the load. Alternating current is supplied to the load from wirings 15 (U), 15 (V), and 15 (W). When a current flows through the connecting line 27, the magnetic field line is guided in the annular core 43a of the sensor module 43. An electric current is generated in the coil. The AD converter 43b generates a digital signal of a voltage signal based on the generated current. The digital signal reflects the current value of the current flowing through the connection line 27. The digital signal is supplied from the covered wire 47 to the controller module 45. The controller module 45 operates based on the direct current supplied from the ACDC power supply module 48 via the covered wire 52.

The CPU of the controller module 45 determines the measured value of the alternating current that circulates based on the supplied digital signal. The CPU compares the measured value with the 125% current value in the data table. When a current value of 125% of the rated current is detected, the CPU starts timing with the first timer. When the timekeeping exceeds the duration determined by the data table, the CPU outputs a cutoff signal. The cutoff signal is supplied to the breaker module 18 through a covered wire (not shown). The trigger circuit outputs a trigger signal in response to the reception of the cutoff signal. The trip coil opens the open / close contact in response to the reception of the trigger signal. In this way, the circuit breaker module 18 cuts off the energization of the electric circuit.

When a current value of 200% of the rated current is detected, the CPU starts timing with the second timer. When the timekeeping exceeds the duration determined by the data table, the CPU outputs a cutoff signal. The cutoff signal is supplied to the breaker module 18 through the covered wire. The trigger circuit outputs a trigger signal in response to the reception of the cutoff signal. The trip coil opens the open / close contact in response to the reception of the trigger signal. In this way, the circuit breaker module 18 cuts off the energization of the electric circuit.

In this embodiment, the controller module 45 is connected to the ADCC power supply module 48 by a covered wire 52. The CPU of the controller module 45 can be kept away from the ADCC power supply module 48. The CPU of the controller module 45 can be kept away from the electromagnetic waves (noise) of the ADCC power supply module 48. Malfunctions of the CPU can be effectively prevented. Moreover, the CPU of the controller module 45 can be kept away from the heat of the ADCC power supply module 48. Efficient heat dissipation from the CPU can be realized. Excessive temperature rise can be avoided in the CPU. Such a breaker device 11 can greatly contribute to the setting of a small rated current value.

In addition, the controller module 45 is connected to the AD converter 43b by a covered wire 47. The CPU of the controller module 45 can be kept away from the sensor module 43. The CPU of the controller module 45 can be kept away from the electromagnetic waves (noise) of the sensor module 43. Malfunctions of the CPU can be effectively prevented. The reliability of the CPU can be increased. Such a breaker device 11 can greatly contribute to the setting of a small rated current value.

Moreover, since the ADCC power supply module 48 and the sensor module 43 are connected to the controller module 45 by the covered wires 52 and 47, respectively, the degree of freedom in arranging the ADCC power supply module 48 and the sensor module 43 with respect to the controller module 45 is widened. be able to. The AD converter 43b of the sensor module 43 can be kept away from the ADCC power supply module 48. The AD converter 43b can be kept away from the electromagnetic waves (noise) of the ADCC power supply module 48. The AD converter 43b can operate well.

The support plate 37 according to the present embodiment includes a first shield plate 53 that separates the ADCC power supply module 48 from the annular core 43a. The annular core 43a can be shielded from the electromagnetic waves (noise) of the ADCC power supply module 48. The annular core 43a can be released from the influence of electromagnetic waves acting on the ADCC power supply module 48. In the sensor module 43, the detection accuracy of the current value can be maintained satisfactorily. Such a breaker device 11 can greatly contribute to the setting of a small rated current value. Moreover, since the support plate 37 also serves as the first shield plate 53, the first shield plate 53 can be easily secured.

In addition, the support plate 37 according to the present embodiment includes a second shield plate 54 that separates the AD converter 43b from the ADCC power supply module 48. The AD converter 43b can be shielded from the electromagnetic waves (noise) of the ADCC power supply module 48. The AD converter 43b can be released from the influence of electromagnetic waves acting on the ADCC power supply module 48. In the sensor module 43, the detection accuracy of the current value can be maintained satisfactorily. Such a breaker device 11 can greatly contribute to the setting of a small rated current value. Moreover, since the second shield plate 54 is continuous from the support plate 37, the second shield plate 54 can be easily secured.

11 ... breaker device, 18 ... breaker module, 43 ... sensor module, 43a ... annular core, 43b ... AD converter, 45 ... controller module, 47 ... (connecting the controller module to the AD converter) covered wire, 48 ... ADCC power supply module, 52 ... (Connecting the controller module to the ADCC power supply module) Covered wire.

Claims (2)

A breaker module that shuts off the power supply in response to the reception of the cutoff signal,
An ADCC power supply module that generates DC power from alternating current in response to the energization.
A sensor module that detects the current value based on the alternating current flowing through the electric wire that penetrates the annular core, and
A controller module connected to the ADCC power supply module with a covered wire and supplying the breaker signal to the breaker module based on the detected current value.
A breaker device characterized by being equipped with. The breaker device according to claim 1, wherein the controller module is connected to an AD converter incorporated in the sensor module to generate a digital signal reflecting the current value with a covered wire.

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