JP2010061929A - Circuit breaker - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a circuit breaker for reducing environmental load and assuring electrical safety by automatically stopping power supply to an electrical path in case that it is not necessary in the electrical path used in construction sites or the like. <P>SOLUTION: The circuit breaker 100 includes a first power supply control means 10 carrying out circuit breaking control due to abnormal current in the electrical path such as excess current, leakage current or the like, and a second power supply control means 11 carrying out circuit breaking control due to a predetermined condition except abnormal current. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

The present invention relates to a circuit breaker applied to an electric circuit for supplying power to a working electric device used at a construction site or the like, and more particularly, to control energization to the electric circuit by generating an abnormal current in the electric circuit. In addition, the present invention relates to a circuit breaker having a function of controlling energization to an electric circuit based on a predetermined condition other than an abnormal current.

At construction sites, etc., where temporary power usage is required depending on the progress of work, a temporary distribution board is installed to supply power to the work electrical equipment. Is going.

As such a temporary distribution board, for example, a distribution board as disclosed in Patent Document 1 is used. The temporary distribution board includes a main switch and a branch switch connected to the load side of the main switch in a casing that forms an outer shell. The main switch in the housing is connected by drawing in the electric wire constituting the primary circuit of the distribution board, and the branch switch is connected by drawing in the electric cable constituting the secondary circuit of the distribution board. , Used to supply power to the working electrical equipment.
Japanese Patent Laid-Open No. 2001-157328 FIG.

As described above, the temporary distribution board is often used by turning on the main switch and branch switch at the start of each day and turning off at the end of work.

However, at construction sites, etc., it is common for a large number of workers in various industries, such as civil engineering work, building work, and plumbing work to enter and exit the work, and the main switch installed in the temporary distribution board and The ON / OFF operation of the branch switch is usually performed by each contractor or worker as necessary.

And who is responsible for turning off the switch at the end of each day depends on the progress of the work at that time and the workers entering and leaving, and the switch is not turned off even after the end of work. In the case of forgetting to cut, there are cases where power is continuously supplied to the working electrical equipment until the start of work the next day.

When the switch is not turned off even after the work is completed in this way and the power continues to be supplied to the electric circuit, there are the following disadvantages.

First, there is an environmental problem as extra energy is consumed.

For example, the power consumption during welding work of an AC arc welder used at a work site is about 1 kW to several kW, depending on the output, and the standby power is about 200 W to 300 W per unit.

That is, as long as the power supply to the welding machine is continued, the standby power alone consumes several hundred watts of extra power per unit, and there is a problem that the environmental load such as CO ₂ emission becomes high.

Temporarily, the standby electric energy for 15 hours at night from the end of work (17:00) to the start of the next morning (8:00) is 200 W × 15 h = 3 kWh. In January, 3 kWh × 30 days = 90 kWh, and in 1 year, 90 kWh × 12 months = 1080 kWh. This is equivalent to approximately 50 kg of carbon dioxide emissions per month when converted to carbon dioxide according to the “Enforcement Ordinance on Promotion of Global Warming Countermeasures”, and approximately 600 kg of carbon dioxide emissions per year. The amount is equivalent to

Second, there are safety issues.

Electrical circuits at temporary sites are mostly electric wires and equipment for movement, and electrical and mechanical protection is often insufficient compared to other facilities. If electricity supply is continued in such an electric circuit and in an unattended state, there is a risk that a discovery may be delayed and a fire may occur when an accident such as a short circuit or leakage occurs.

In addition, when changing the wiring of equipment at the start of work, it may be mistaken that the switchboard of the temporary distribution board is turned off the previous day, and the live parts may be touched directly, resulting in electric shock and personal injury. is there. For this reason, it is desirable that the switch is turned off after the work is completed at the construction work site.

Accordingly, the object of the present invention is to automatically stop energization of the electric circuit when it is determined that energization is not necessary for the electric circuit used at the construction site, etc. It is to provide a circuit breaker that can reduce electrical safety.

In order to solve the above-mentioned problems, in claim 1 of the present invention, the first energization control means for controlling the interruption due to an abnormal current in the electric circuit such as an overcurrent or a leakage current, and a predetermined condition other than the abnormal current Thus, a circuit breaker is provided which is characterized by comprising a second energization control means for controlling the break.

This allows the second energization control means to determine whether or not energization to the electric circuit is necessary. As a result, when energization is not necessary, the energization to the electric circuit is automatically stopped and controlled. Therefore, it is possible to provide a circuit breaker that can solve the environmental problems associated with the consumption of excess energy and also solve the safety problems.

The second energization control means includes a timer for setting the energization time. When the time determined by the timer has elapsed, the trip means is driven by an output signal from the timer, The circuit breaker may be provided by opening the electric circuit by the tripping means acting on the contact opening / closing mechanism.

As a result, energization of the electric circuit is performed only within the time determined by the timer, and the electric circuit is cut off and not energized outside the time, so that environmental problems associated with the consumption of excess energy. It is possible to provide a circuit breaker that can solve the problem of electrical safety.

The second energization control means receives a current detection means for detecting a current flowing in the electric circuit, a voltage detection means for detecting a voltage, and an output signal from the current detection means and the voltage detection means to obtain an electric energy. Comprising a calculation means, a storage medium that stores information on the amount of power that can be energized, and a reading means that reads the storage medium and outputs the read information to the calculation means, and is stored in the recording medium by the calculation means The power amount information and the power amount obtained by the computing means are compared. When the obtained power amount reaches the power amount information, the tripping means is driven by the output signal from the computing means, A circuit breaker may be provided in which the circuit is opened by the tripping means acting on the contact opening / closing mechanism.

As a result, a necessary amount of electric power is determined in advance at the work site and the energization is performed for the predetermined amount of electric power, so that electric power is not consumed more than necessary. Also, if unnecessary power is energized at night due to forgetting to cut off at the end of work, etc., the amount of power that can be used during work during the day will be reduced accordingly, inevitably preventing forgetting to cut off. As a result, the environmental load can be reduced and electrical safety can be ensured.

The second energization control means receives a current detection means for detecting a current flowing in the electric circuit, a voltage detection means for detecting a voltage, and an output signal from the current detection means and the voltage detection means to obtain an electric energy. An arithmetic means, a data carrier storing authentication information for managing entry / exit to / from a work site of a construction worker using the electrical work equipment used on the electric circuit, and a work-related person, and reading the data carrier, the arithmetic means In the case where there is no person in the work site, the calculation means is configured to compare the input information that the worker has entered the work site with the output information that has exited. When the electric energy obtained in step (b) exceeds a predetermined value, the tripping means is driven by the output signal from the computing means, and the tripping means acts on the contact opening / closing mechanism to May provide the circuit breaker is characterized in that the open state.

As a result, when there is no worker or work-related person in the work site, when there is a predetermined power consumption, it is configured to control the energization of the electric circuit. It is possible to efficiently cut off the power supply to the electric circuit, and to prevent an electric fire in an inexhaust state caused by electric leakage.

The second energization control means includes a clock means having a clock function, a work time setting unit for setting a start time and an end time at a work site, and a signal output means. A circuit breaker may be provided by energizing the electric circuit within a predetermined time.

Thereby, it can comprise so that electricity supply to an electric circuit may be performed only within the work time in a work site, and it can control electricity supply when electricity supply is not required.

The work time setting unit may further include a break time setting unit for setting a break time, and the circuit may be energized during the break time determined by the break time setting unit.

As a result, power consumption in the electric circuit is reduced due to the temporary absence of electrical equipment for work during the break time at the work site, but the equipment that requires warm-up is controlled by interrupting energization at each break time. It is possible to avoid a decrease in work efficiency due to troublesome restarting.

The work time setting unit may further include a break time setting unit for setting a break time, and the circuit may not be energized during the break time determined by the break time setting unit. .

As a result, even when the electrical equipment for work is temporarily not used during the break time at the work site, it is possible to control the energization of the electric circuit frequently, which reduces the work efficiency, but the environmental load. Can be reduced, and it can prevent accidents caused by inadvertent contact with the circuit.

Further, the second energization control means may be configured by combining any or all of the features of claims 2 to 5.

As a result, it is possible to perform control under conditions suitable for each site as compared with the case of controlling the power supply to the electric circuit in the field based on each predetermined condition. it can.

According to the present invention, when it is determined that there is no need to energize an electric circuit used at a construction site or the like, the energization to the electric circuit is automatically stopped to reduce the environmental load and A circuit breaker capable of ensuring safety can be provided.

Next, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram when the circuit breaker of the present invention is connected to an electric circuit. In FIG. 1, 100 is a circuit breaker, and 1 to 3 are three-phase three-wire electric circuits to which the circuit breaker 100 is connected. In addition, as the electric circuit, a phase-wire type electric circuit that is commonly used in a work site such as a single-phase three-wire system, a single-phase two-wire system, and a three-phase three-wire system is assumed.

4 is a contact device. The contact device 4 has a structure in which a fixed contact and a movable contact are paired, and energization / interruption of the electric circuit is performed by opening and closing the contact. Reference numeral 7 denotes a contact opening / closing mechanism that is configured using a link mechanism or the like and acts on the contact device 4. The contact opening / closing mechanism unit 7 is interlocked with the operation handle and transmits the movement of the operation handle to the contact device.

Reference numeral 10 denotes first energization control means. The first energization control means operates when an abnormal current such as an overcurrent or a short-circuit current occurs in the electric circuit, and acts on the opening / closing mechanism 7 to open the contact device. Specifically, it is a tripping device configured by using a bimetal or an electromagnetic tripping device.

Further, when the circuit breaker is a leakage breaker, when the leakage current in the electric circuit reaches a predetermined sensitivity current, it acts on the switching mechanism portion 7 to open the contact device. A tripping device is also included.

Reference numeral 11 denotes second energization control means. The second energization control means determines whether to energize the electric circuit based on a predetermined procedure using a predetermined condition other than an abnormal current in the electric circuit as a cutoff factor. And if it determines with the electricity supply to an electric circuit unnecessary, it will act on the contact switching mechanism part 7, and will stop the electricity supply of the power supply to an electric circuit.

Reference numeral 5 denotes detection means for detecting power consumption in the electric circuit, and an output signal output according to the power to the second energization control means 11 is input to the second energization control means 11. The second energization control means 11 processes the output signal from the detection means 5 as one of the predetermined conditions.

Next, the circuit breaker of the present invention will be described with reference to a more detailed internal block diagram shown in FIG.

As in FIG. 1, 100 is a circuit breaker, and 1 to 3 are electrical circuits to which the circuit breaker 100 is connected. Also, 4 is a contact device, 5 is a detection means, 7 is a contact opening / closing mechanism, 10 is a first energization control means configured using a bimetal or an electromagnetic trip device, and 11 is a second energization control means. is there.

The detection means 5 includes a current detection means 51 and a voltage detection means 52, and outputs a signal based on the detection current and the detection voltage. The current detection means 51 may be configured using a current transformer or a shunt resistor. The voltage detection means 52 may be configured using a voltage sensor or the like. For single-phase two-wire system, the current of one of the two lines, for single-phase three-wire system, the power supply side two-wire, for three-phase three-wire system, the current of two lines of UVW Arrange to detect.

The trip device 9 is a trip coil that is driven by receiving a signal from the second energization control means. The trip coil includes an iron core that acts on the contact switching mechanism 7.

When a current flows through the trip coil, the iron core is drawn into the coil by electromagnetic force, the latch provided in the contact opening / closing mechanism 7 is pulled off, and the contact device 4 is opened. The tripping device may be configured using a piezoelectric element or an actuator that performs mechanical displacement by supplying energy. Moreover, you may comprise so that the said iron core may be operated in the direction to protrude.

In the case where an earth leakage breaker is configured as a circuit breaker, the trip device 9 may be used as an earth leakage trip means.

Next, the second energization control means 11 will be described. The second energization control means 11 performs a determination process on whether or not energization is necessary mainly using the microcomputer 121. When it is determined that the microcomputer does not need to be energized based on a predetermined condition, a signal is output to the trip driving means 122 that drives the trip device 9. The microcomputer 121 uses an I / O port, a program data storage area, a data storage area, an arithmetic processing unit, and the like.

The trip driving means is configured by using a thyristor 122 that is driven by using a signal output from the microcomputer 121 as a trigger and becomes a part of a power supply path of the trip means. As the trip driving means, other relays or semiconductor switches may be used.

First, regarding the predetermined condition determined by the second energization control means 11, the first predetermined condition will be described. The first predetermined condition is due to a timer for setting the energization time. When the microcomputer has a timer function and the contact is turned on by operating the handle of the circuit breaker, the circuit is energized for the time set by the timer. The start of counting by the timer may be triggered by applying a voltage to the microcomputer when the contact is turned on, or may be triggered by the occurrence of a current flowing through the electric circuit by the detecting means. As the energization time, for example, 9 hours or 12 hours of the scheduled working time of the day is set in advance, and when the energization time is reached, the timer counts up, and the trip driving means 122 described above from the microcomputer. A drive signal is output to.

The timer setting time can be manually set from the outside of the microcomputer through the I / O port by the push button operation type timer time setting means 126. Thereby, even when different energization times are set for each work site, the energization time such as 8 hours or 10 hours can be easily set.

Assuming the case where it is necessary to energize the circuit after the first energization control due to special circumstances such as overtime, if the contact is re-introduced within 30 minutes or 1 hour after the opening, 1 hour or 2 The microcomputer may be controlled with a re-count-up function so that it counts up in a shorter time than the time when the timer counts up for the first time. Since at least a few hours have passed since the end of the previous day, the contact input at the start of the next day is counted as the working hours of the day.

Next, the second predetermined condition will be described. The second predetermined condition is to enable energization by the amount of electric power by reading data of a storage medium storing usable electric energy information.

Specifically, the power detected by the detecting means 5 is integrated by a microcomputer, and the integrated value and usable power information stored in the storage medium are read and compared by the storage medium reading means 130, and the integrated value is calculated. When the usable power information is reached, a driving signal is output from the microcomputer to the trip driving means 122 to drive the trip device 9, and the trip device 9 acts on the contact opening / closing mechanism section 7. As a result, the contact device 4 is opened, and the power supply to the electric circuit is cut off.

The signal output from the detection means 5 is amplified by a voltage amplification circuit as input preprocessing before being input to the microcomputer 121, unnecessary noise is removed by a low-pass filter, and a signal level adjustment circuit is used. It is adjusted to an input level suitable for the input port of the microcomputer and input to the microcomputer. In the present embodiment, a plurality of detection means are provided, and as many input preprocessing systems as the number of detection means are provided. In the single-phase three-wire system and the three-phase three-wire system, the outputs of the two current detection elements such as current transformers and shunt resistors, which are current detection means installed in two of the three wires, are respectively output. It may be configured so that it is determined that no work is performed when either output falls below the threshold, or when the sum of the outputs falls below the threshold It may be configured to determine that no work is performed.

As a storage medium, an IC card, a compact flash (registered trademark) card, which is a magnetic storage card, an SD memory card, or the like is assumed. For example, it can be used by determining the amount of power that can be used at each job site at the head of the work site, writing the amount of power into the storage medium from a computer, and reading the storage medium with a circuit breaker on site. Set the amount of power.

As reading means, an IC card reader, a magnetic storage card reader, or the like is assumed.

In addition, as a method of reading usable power amount information with a circuit breaker, a communication means connected to a microcomputer is provided in the circuit breaker, and a predetermined amount of communication is provided from the communication means provided on the general contractor side, which is the general manager of the work site. The power amount information may be transmitted, and the power amount information received on the circuit breaker side may be configured to compare the integrated value of the power detected on the circuit with the received power amount information.

The communication means may be communication using a telephone network or communication using an Internet network. The circuit breaker as seen from the general contractor side may be specified by assigning a unique identification number to the circuit breaker side in advance, and may be specified based on the identification number. A communication unit compatible with TCP / IP may be used as a communication unit on the circuit breaker side, and may be configured to be specified based on a MAC address or an IP address.

In particular, in the case of an emergency connection environment, the circuit breaker side may be specified using a DDNS that links a dynamically assigned IP address and a URL. Alternatively, the circuit breaker may be configured to access a server prepared on the Internet, acquire power amount information stored in the server, and compare the power amount information with an integrated value. Note that such a method is used when performing communication based on the IPv4 (Internet Protocol Version 4) standard. However, when performing communication based on the IPv6 standard, the communication source can be identified in the first place, so a system such as DDNS is used. It can be simplified.

Next, the third predetermined condition will be described. The third predetermined condition is that the reading means 130 reads the information on the data carrier carried by the construction worker entering or leaving the work site or the person concerned with the work, compares the input information with the output information, If there is no power consumption and the power consumption exceeds a certain level, the power supply is stopped.

As the data carrier, an ID card is assumed that is carried by a construction worker who enters or exits the work site or a person involved in the work. The ID card is provided with a storage unit that stores authentication information for identifying the person concerned at the site, and a communication unit that is provided so that the authentication information can be read from the outside. As authentication information, for example, authentication information that is common to all vendors entering and exiting the work site may be stored, authentication information that is different for each vendor may be stored, and individuals may be identified. The authentication information may be stored. Such information may be stored in advance in an ID card using a computer.

In addition to the ID card, the data carrier may be a portable object equipped with an IC tag storing identification information or a wireless IC tag.

Workers and workers involved carry these data carriers. Then, when entering and leaving the work site, the authentication information of the data carrier is read from the reading means 125 provided in the circuit breaker 100. As a result, it is possible to discriminate information such as whether or not workers and workers are present in the work site.

Specifically, the read data carrier information is stored in the data storage unit provided in the microcomputer 121, and the information that the person has entered and the information that the person has gone out are managed in pairs and individually. Determine the entry / exit status.

Further, the detection of the power consumption in the electric circuit is performed in the same manner as described in the second predetermined means, and when it is determined that there is no person at the work site, a predetermined power consumption, for example, a predetermined power consumption is 180 W. When 200 W of power is detected, a signal is output to the trip driving means 122 and the trip means 9 is driven to cut off the energization of the electric circuit.

Next, the fourth predetermined condition will be described. The fourth predetermined condition is that the preset start time and end time are managed by a clock means having a clock function, and the electric circuit is energized only during the working hours.

The working hours can be manually set from the outside of the microcomputer through the I / O port by the push button operation type working time setting means 124. The start time and end time at the work site are set, the current time is compared with the set time by a clock function provided in the microcomputer, and when the end time is reached, the trip driving means 122 is reached. And the tripping means 9 is driven to cut off the power supply to the electric circuit.

As with the working time setting means 124, a break time setting unit 123 may be provided so that the break time at the work site can be set. For example, the lunch break time is set from 12 o'clock to 13 o'clock, and two types of energization control processes are provided during that time. As a process during the first break, control is performed so as not to energize the electric circuit during the break time, and as a process during the second break, energization to the electric circuit is continued during the break time. It is preferable that each process is provided so as to be selectable by the selection means.

Also, multiple break times can be set, and in addition to the lunch break, the break time can be set from 10 am to 10 minutes or from 3 pm to 10 minutes. It may be configured to be able to select whether or not to perform. For example, if a predetermined condition is reached when the break time is short and the power supply to the circuit is cut off, it will take time to turn on the circuit breaker again or to use equipment that requires warm-up. However, if the break time is short, it is possible to save time and effort to install the circuit breaker and warm-up time of the equipment by not cutting off the power supply to the circuit even when the predetermined condition is reached. It is possible to continue without reducing work efficiency as much as possible. Depending on the work site, considering the balance between work efficiency and reduction of environmental load by not energizing, both can be selected, so that flexible selection can be made according to the situation .

Next, the circuit breaker of the present invention will be described with reference to FIG.

In FIG. 3, the external view of the circuit breaker of this invention is shown. The circuit breaker in the present embodiment has a first energization control means and a second energization control means built in the casing.

A display unit 129 displays various setting information. The display unit is configured by using a liquid crystal display, and displays information such as timer time, working time, and break time set by the microcomputer 121.

Reference numeral 128 denotes a setting button for setting the setting condition selected by the setting condition switching unit 1281. For example, when the timer time is selected by the setting condition switching unit 1281, by operating the setting button 128, the timer time displayed on the display unit can be adjusted, and a desired timer time can be set. In addition, when the working time is selected by the setting condition switching unit 1281, the start time and the end time of the working time displayed on the display unit can be set by operating the setting button 128. When a break time is selected by the setting condition switching unit 1281, the start time and end time of the break time displayed on the display unit can be set by operating the setting button 128.

Reference numerals 130 and 131 denote reading units that perform data communication with the above-described data carrier and a card that stores information on the amount of power that can be used, and read information stored in the data carrier and the card. The read information is output to the microcomputer. Further, the storage information stored in the recording medium is also read, and the read information is output to the microcomputer.

In this embodiment, the circuit breaker is integrated with the circuit breaker. However, when the circuit breaker installation location and the entrance / exit of the work site are separated, the reading unit 130 and the circuit breaker are separated. And may be connected by signal lines, or may be configured by providing a wireless communication unit.

Reference numeral 125 denotes a power lamp, which is configured using LEDs. The power lamp is electrically connected to the output port of the microcomputer 121 and is lit when the determination block is functioning.

Note that the method of turning on the power lamp may be changed according to the determination status of the determination unit. For example, the lighting is normally performed, but the determination process is performed based on the detected current, and when the energization control is performed, it may be configured to blink to notify that the energization will be stopped soon.

127 is a test button. When the test button 127 is operated, the microcomputer 121 performs a self-check to check whether the energization control function is normal.

In the present embodiment, when the test button 127 is operated, a cutoff signal of the microcomputer 121 is output after 5 seconds. Since the tripping means driving means receives the shut-off signal and the anode-cathode becomes conductive, power is applied to the tripping means provided in the shut-off block. Then, the tripping means is driven and acts on the contact opening / closing mechanism to open the contact.

Reference numeral 114 denotes a cut-off display button. The shut-off display button 114 is configured to protrude from the casing constituting the outline of the shut-off block when the shut-off operation is performed according to the determination of the second energization control means. Specifically, when an iron core provided in the tripping means is operated, it is configured to project / retract in conjunction with the movement of the iron core.

Thereby, when the operation handle is in the OFF position, it is possible to determine whether or not the blocking operation has been performed by controlling the energization by looking at the protruding state of the blocking display button 114 together.

Reference numeral 150 denotes a control release button. The control release button 150 is connected to the I / O port of the microcomputer, and is configured to release the control by the second energization control means when a signal is input from the control release button 150. As described above, when the predetermined condition is reached, the power supply of the circuit is cut off, but there may be cases where a little more power is required. If the work is unavoidably interrupted, and the work cannot be performed until the start of the next day, and work efficiency is significantly reduced, etc., the control is released, resulting in a reduction in the use of electric power and a reduction in environmental load. Leads to.

Reference numeral 140 denotes a speaker that notifies the surroundings that energization control is performed. When the microcomputer controls energization based on the predetermined condition as described above, it notifies the user that the energization control process is performed before performing the energization control.

The voice data may be stored in advance in the data storage area of the microcomputer, or may be configured separately using a voice IC.

For example, if the predetermined condition is based on a timer or energized time, several minutes before the timer counts up or a few minutes before the timer counts up, the power will be turned off soon. Please be careful when you are working. "

In addition, if the power condition information that can be used for the specified condition, in addition to notifying that “the power will be turned off soon”, before the end of work every day, “50 kWh of power can be used.” The remaining usable power amount information such as may be notified.

The second energization control means may be separated from the circuit breaker and configured as an external unit.

In this case, as shown in FIG. 4, the circuit breaker block 110 provided with the first energization control means that is connected to the electric circuit and interrupts the electric circuit as necessary, and the necessity of energizing the electric circuit is determined. And a determination block 120 provided with second energization control means, and each is connected by a connecting means.

The blocking block 110 and the determination block 120 are connected using a mechanical engagement portion. In addition, you may connect more easily using adhesives, such as a double-sided tape.

The determination block 120 includes a power acquisition unit that is connected to an electric circuit provided in the blocking block 110 to acquire power, a current / voltage detection signal acquisition unit that acquires a signal output from the current detection unit, and a trip unit. A tripping means drive path connection section for driving the power supply and the signal transmission / reception to / from the blocking block is provided.

In the example shown in FIG. 4, lead wires constituting the power supply acquisition unit, the current / voltage detection signal acquisition unit, and the tripping means drive path connection unit are arranged in a part of the body constituting the outline of the blocking block. A hole is provided for the determination block.

In this way, the circuit breaker shown in FIG. 4 can be used by modifying the circuit breaker with a tripping means and the earth leakage circuit breaker. Compared to the development of a circuit breaker provided with the second energization control means, there is an advantage that it can be provided while reducing the development period of the circuit breaker and at the same time reducing the manufacturing cost.

The present invention can be used for a temporary distribution board at a construction site or a construction site. In addition, since it is possible to prevent forgetting to turn off electricity, it can be used for household purposes, factories and other business purposes as much as possible for the same purpose.

Block diagram showing the circuit breaker of the first embodiment The internal block diagram of a circuit breaker. The external view of the circuit breaker of this invention. The external view which shows the example of another circuit breaker.

Explanation of symbols

1, 2, 3 Electric circuit 4 Contact device 5 Detection means 7 Contact opening / closing mechanism section 9 Tripping means 10 First energization control means 11 Second energization control means 100 Circuit breaker 110 Interrupt block 114 Interrupt display button 120 Determination block 121 Microcomputer 122 Trip driving means 123 Rest time setting means 124 Working time setting means 125 Power lamp 126 Timer time setting means 127 Test button 128 Setting button 1281 Switching means 130 Reading means 131 Reading means 140 Speaker 150 Control release means

Claims (8)

It is configured to include a first energization control means for controlling the interruption due to an abnormal current in the electric circuit such as an overcurrent or a leakage current, and a second energization control means for controlling the interruption due to a predetermined condition other than the abnormal current. Circuit breaker characterized by. The second energization control means is
It includes a timer that sets the energization time,
When the time determined by the timer has elapsed, the tripping means is driven by the output signal from the timer, and the tripping means acts on the contact opening / closing mechanism to open the electric circuit. The circuit breaker according to claim 1. The second energization control means is:
A current detection means for detecting a current flowing in the electric circuit, a voltage detection means for detecting a voltage, a calculation means for receiving an output signal from the current detection means and the voltage detection means, and obtaining an electric energy;
A storage medium that stores information on the amount of power that can be energized;
It comprises reading means for reading the storage medium and outputting the read information to the calculation means,
The power amount information stored in the recording medium by the calculation means is compared with the power amount obtained by the calculation means. When the calculated power amount reaches the power amount information, an output signal from the calculation means 2. The circuit breaker according to claim 1, wherein the tripping means is driven by the switch and the tripping means acts on the contact opening / closing mechanism to open the electric circuit. The second energization control means includes a current detection means for detecting a current flowing in the electric circuit, a voltage detection means for detecting a voltage, and a calculation means for obtaining an electric energy by receiving an output signal from the current detection means and the voltage detection means. When,
A data carrier storing authentication information for managing entry / exit to / from a work site of a construction worker and a work-related person using the work electrical equipment used in the electric circuit, and information read by the data carrier and read by the calculation means Power that is calculated by the computing means when there is no person in the work site. The trip means is driven by an output signal from the calculation means when the amount is equal to or greater than a predetermined value, and the trip circuit acts on the contact opening / closing mechanism to open the electric circuit. Item 1. The circuit breaker according to item 1. The second energization control means is:
A clock means having a clock function, a work time setting unit for setting a start time and an end time at a work site, and a signal output means;
2. The circuit breaker according to claim 1, wherein the circuit is energized within a time determined by the work time setting unit. 6. The work time setting unit further includes a break time setting unit for setting a break time, and energizes the electric circuit during the break time determined by the break time setting unit. Circuit breaker. 6. The work time setting unit further includes a break time setting unit for setting a break time, and the circuit is not energized during the break time determined by the break time setting unit. Circuit breaker as described. 6. The circuit breaker according to claim 1, wherein the second energization control means is configured by combining any or all of the features of claims 2 to 5.

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