CN105191038A - Distribution system and current limiting device - Google Patents
Distribution system and current limiting device Download PDFInfo
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- CN105191038A CN105191038A CN201480016514.4A CN201480016514A CN105191038A CN 105191038 A CN105191038 A CN 105191038A CN 201480016514 A CN201480016514 A CN 201480016514A CN 105191038 A CN105191038 A CN 105191038A
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- current limiting
- distribution system
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/006—Calibration or setting of parameters
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/08—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current
- H02H3/10—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions
- H02H3/105—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to excess current additionally responsive to some other abnormal electrical conditions responsive to excess current and fault current to earth
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00002—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by monitoring
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00034—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving an electric power substation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00032—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for
- H02J13/00036—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers
- H02J13/0004—Systems characterised by the controlled or operated power network elements or equipment, the power network elements or equipment not otherwise provided for the elements or equipment being or involving switches, relays or circuit breakers involved in a protection system
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/30—State monitoring, e.g. fault, temperature monitoring, insulator monitoring, corona discharge
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Distribution Board (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Emergency Protection Circuit Devices (AREA)
Abstract
The purpose of the present invention is to enable the settings for the rated current value of a current limiting device (4) in a distribution system (1) to be changed easily by remote control, placing no burden on the consumer or the power supplier (S). The current limiting device (4) provided on a distribution board (3) in the distribution system (1) comprises: an overcurrent detection unit (46) for detecting that the vector sum of currents flowing in the voltage phase of an electric circuit exceeds a prescribed rated current value; a communication unit (47) for communicating with a power meter (2); and a calculation circuit (45) for variably setting a prescribed rated current value on the basis of a setting signal acquired through the communication unit (47). This configuration allows the rated current value of a current limiting device (4), with no burden being placed on the consumer or the power supplier (S), to be easily changed by remote control.
Description
Technical field
The present invention relates to and a kind ofly possess the distribution system to the current limiting device that the electric current flowed in circuit limits and the current limiting device for this distribution system.
Background technology
In the past, there is following situation: current limiting device (also referred to as ampere-circuit breaker (amperebreaker) or limiter (limiter)) is set in electric distribution board for apartment etc., this current limiting device be used for according to and the electric power contract that supplies company limit party in request and utilize and specify above electric power.The structure example of electric distribution board for apartment in the past shown in Figure 4.In electric distribution board for apartment 100, current limiting device 101 and earth leakage breaker 102 are configured at primary-side circuitry in the mode be connected in series, and branch circuit breaker 103 is configured to the load side terminal being connected to earth leakage breaker 102.
As shown in Figure 5, current limiting device 101 possesses current measuring element 101a and overcurrent test section 101b.This overcurrent test section 101b carries out calculation process in computing circuit 101c, detects the current value detected by current measuring element 101a and whether exceedes the load current value (such as 30A etc.) meeting the contract capacity supplying company with electric power.Then, served as current detecting part 101b when detecting that flowing has an electric current exceeding load current value, the contact of computing circuit 101c closing relay 101d, sends shutoff signal via the earth leakage breaker 102 of signal transmission unit 101e to outside.
Earth leakage breaker 102 makes the contact making device action being arranged at voltage phase to carry out the cut-out action of break contact when receiving this shutoff signal, thus the electric power cut off to load side terminal supplies.In addition, earth leakage breaker 102 also has independent current measuring element mutually at voltage, and has following functions: use this current measuring element and trip gear, carries out cut-out action when detecting overcurrent.
In addition, there is the problem maximized in the distribution board possessing this current limiting device.Therefore, a kind of miniaturization in order to realize distribution board is proposed and the current limiting device that makes current limiting device integrated with earth leakage breaker and failure of current system (such as with reference to patent documentation 1).
Patent documentation 1: Japanese Unexamined Patent Publication 2011-30377 publication
Summary of the invention
But, as the current limiting device be configured in above-mentioned distribution board in the past, the selected special purpose device with the intrinsic load current value meeting the contract capacity supplying company with electric power.Such as, when A Utilities Electric Co. and party in request sign a contract by " Volume charge electric light B ", there are 7 kinds of contracts from 10A to 60A, need to arrange the different current limiting device of amperage according to each contract.Thus, once variation on contract after current limiting device being installed in distribution board, then can produce and be replaced by the labour of the new current limiting device with other load current value by electric power provider and time, expense are born.
In addition, following situation is also imagined: the specified setting button 101f that electric power provider uses special setting apparatus outward or is arranged at current limiting device 101 as shown in Figure 4 at the house of party in request is to change the load current value of current limiting device 101.But, in this case, also need party in request on the scene, thus produce the number of working processes of the operating personnel of electric power provider side.
Like this, there is following problem: the change of the load current value of current limiting device causes needing being replaced by new current limiting device or need party in request on the scene or need the number of working processes etc. of operating personnel of electric power provider in the past, produced required above labour and time, expense burden.
The present invention completes in view of the above problems, its object is to provide a kind of labour without the need to party in request, electric power provider and time and can come easily to carry out setting the distribution system changed to the load current value in current limiting device by remote operation.In addition, its object is also to provide a kind of current limiting device for this distribution system.
In order to achieve the above object, the present invention is the distribution system possessing electric-power metering instrument and distribution board, this electric-power metering instrument is inserted in circuit between electric power provider and party in request to measure electricity usage amount, this distribution board is connected with the circuit from this electric-power metering instrument, electric power is distributed in party in request, the feature of this distribution system is, the current limiting device that the electric current flowed in circuit is limited is provided with in above-mentioned distribution board, this current limiting device possesses: overcurrent test section, its detect circuit voltage mutually in the vector of electric current of flowing exceed the situation of the load current value of regulation, Department of Communication Force, it is for communicating with above-mentioned electric-power metering instrument, and operational part, it is based on the setting signal got via above-mentioned Department of Communication Force, can be set with changing by the load current value of afore mentioned rules.
In this distribution system, preferably, above-mentioned current limiting device also possesses signal transmission unit, and when detecting the situation of the load current value exceeding afore mentioned rules in above-mentioned overcurrent test section, this signal transmission unit sends shutoff signal to the cutter of outside.
In this distribution system, preferably, above-mentioned signal transmission unit sends shutoff signal based on the instruction from above-mentioned operational part to trunk cutter.
In this distribution system, preferably, above-mentioned current limiting device also possesses timing unit, above-mentioned signal transmission unit is based on the instruction from above-mentioned operational part, preferentially shutoff signal is sent to branch's cutter of regulation, even if when the reduction of after-current of the set time that have passed through timing in above-mentioned timing unit is also not enough, send shutoff signal to trunk cutter.
In this distribution system, preferably, above-mentioned cutter is built-in with relay-set.
In this distribution system, preferably, above-mentioned Department of Communication Force carries out any one in wire communication, radio communication and power line communication.
In this distribution system, preferably, above-mentioned current limiting device is configured to become same module with branch cutter.
In addition, the invention is characterized in, is the current limiting device for above-mentioned distribution system.
According to distribution system involved in the present invention, the Department of Communication Force that current limiting device possesses receives the setting signal for setting the load current value changing to regulation from the electric-power metering instrument of distribution board outside, can be set with changing by this load current value.Therefore, in the present invention, can come easily to carry out setting to the load current value in current limiting device by remote operation without the need to the labour of party in request, electric power provider and time to change.
Accompanying drawing explanation
Fig. 1 is the overall structure figure of the distribution system involved by embodiments of the present invention.
(a) of Fig. 2 is the outside drawing of the current limiting device that this distribution system possesses, and (b) of Fig. 2 is the functional block diagram of above-mentioned current limiting device.
Fig. 3 is the overall structure figure of the distribution system involved by variation 2 of above-mentioned execution mode.
Fig. 4 is the overall structure figure of distribution board in the past.
Fig. 5 is the functional block diagram of the current limiting device that distribution board in the past possesses.
Embodiment
(execution mode)
With reference to accompanying drawing, the distribution system involved by embodiments of the present invention is described.As shown in Figure 1, distribution system 1 possesses electric-power metering instrument 2 and distribution board 3.
Electric-power metering instrument 2 is inserted in circuit between electric power provider S and party in request to measure the device of electricity usage amount, in order to carry out meterage etc. to party in request and arrange.This electric-power metering instrument 2 improve the reliability of power network entirety, efficiency be called as in the technology of intelligent grid (smartgrid) known as intelligent instrument, such as use when realizing the demand response (demandresponse) etc. optimizing the electricity usage amount of party in request according to the balance between supply and demand of electric power provider S, party in request.
As shown in Figure 1, electric-power metering instrument 2 is connected in the mode of being carried out two-way communication by wide-area communication, power line communication (PLC:PowerLineCommunication) with electric power provider S.Electric power provider S has following long-range opening and closing function: can the value of checking meter of telemonitoring electric-power metering instrument 2, carries out controlling making supplying at the lower electric power that can promptly cut off such as situation of the illegal use that electric power occurs.In addition, in the present embodiment, be premised on situation below: electric-power metering instrument 2 does not have the function directly cutting off circuit, even if detect that overcurrent also cuts off circuit by the cutter in distribution board 3 safe and suitablely.
Distribution board 3 is connected with the circuit from electric-power metering instrument 2, there is the function of being carried out by the electric power supplied from electric power provider S distributing in party in request, in the present embodiment, distribution board 3 possesses current limiting device 4, earth leakage breaker 5 and branch circuit breaker 6.Current limiting device 4 and earth leakage breaker 5 are configured at the primary-side circuitry of distribution board 3 in the mode be connected in series, branch circuit breaker 6 is configured to the load side terminal being connected to earth leakage breaker 5.The power supply side terminal of current limiting device 4 is connected with the power side wire of the single-phase 3 line formulas of primary-side circuitry etc.Between current limiting device 4 and earth leakage breaker 5, the load side terminal of current limiting device 4 is connected by the electric wire of primary-side circuitry with the power supply side terminal of earth leakage breaker 5.
At this, current limiting device 4 and earth leakage breaker 5 form trunk cutter.In addition, " 40A " in the current limiting device 4 shown in Fig. 1, " 50A " in earth leakage breaker 5 represent the example of the load current value for carrying out cut-out action respectively.
Current limiting device 4 has the situation of the electric current of the load current value exceeded as set upper limit value to flow through the electric current of circuit with restriction for detecting flowing.In order to limit to utilize based on the contract etc. supplying company with electric power, this current limiting device 4 such as specifies that above electric power is arranged.Shutoff signal (also referred to as trip signal etc.), when detecting the electric current exceeding load current value, is outputted to outside earth leakage breaker 5 via holding wire 7 by current limiting device 4.In addition, current limiting device 4 can also via other holding wire (not shown) to specific branch circuit breaker 6 outputting cutting break signal.
Earth leakage breaker 5 possesses current measuring element and trip gear, makes trip gear action to carry out cut-out action (tripping operation (trip) action etc.) when detecting in circuit and specifying above leakage current.In addition, when being detected the electric current and outputting cutting break signal that exceed load current value by current limiting device 4 and outside terminal receives this shutoff signal, earth leakage breaker 5 makes trip gear action to carry out cut-out action, thus the electric power cut off to load side terminal supplies.
Multiple trip gear configures and forms by branch circuit breaker 6 in parallel, and each circuit being branched off into multiple branch circuits is carried out to conducting, cuts off action.In addition, although do not illustrate, each branch circuit is also connected with the various load such as air-conditioning equipment, IH equipment except being connected with ligthing paraphernalia, personal computer.
Then, the internal structure of current limiting device 4 is described with reference to Fig. 2.Current limiting device 4 possesses current measuring element 44, computing circuit 45, overcurrent test section 46, Department of Communication Force 47, output relay 48, power circuit 49, signal output terminal 50, holding wire 51, shutoff signal sending part 52, display part 53 and timing unit 54.
Current limiting device 4 is made up of the body comprising insulating material.This current limiting device 4 and two portion of terminal that three-phase circuit is provided with power supply side terminal 41a, 41b, 41c and load side terminal 42a accordingly, 42b, 42c are used as being connected with circuit connected in series with voltage phase (L1 phase), voltage phase (L2 phase), neutral phase.These power supply side terminals 41a, 41b, 41c and load side terminal 42a, 42b, 42c are by being electrically connected by conductor 43a, 43b, 43c of arranging mutually.Conductor 43a, 43b of being connected with voltage phase (L1 phase and L2 phase) are respectively arranged with the gallon portion that current measuring element 44a, 44b are used as the electric current of each voltage phase of detection circuit, and this current measuring element 44a, 44b comprise the current transformer (CT) etc. detecting the electric current flowed in each conductor.
Current measuring element 44a, 44b are connected with the computing circuit 45 as arithmetic processing section, and the output signal of current measuring element 44a, 44b is imported into computing circuit 45 and is carried out calculation process.Computing circuit 45 uses the output of current measuring element 44a, 44b to compare computing, and the total (vector) detecting the electric current flowed in two conductors 43a, the 43b be connected with voltage exceedes the situation of set upper limit value (load current value).Overcurrent test section 46 carrys out detection of excessive current by these current measuring elements 44a, 44b and computing circuit 45 based on the mechanical action of electromagnetic force.
Department of Communication Force 47 has the function of carrying out with the electric-power metering instrument 2 being arranged at outside communicating, also there is the function as higher limit configuration part, this higher limit configuration part, based on the setting signal got from electric-power metering instrument 2, will become the load current value I of threshold value when calculating overcurrent in computing circuit 45
thcan set with changing.
As the communication between electric-power metering instrument 2 and Department of Communication Force 47, can list wire communication, wireless near field communication (ZigBee (trade mark) etc.), information signal is superimposed upon flow through power line the signal of telecommunication on realize the power line communication (PLC) etc. of high-speed communication.Department of Communication Force 47 by selecting the means of communication of the most applicable communication environment, can improve communication connection performance, and, without the need to special bulking block, realize the two-way communication between electric-power metering instrument 2 and current limiting device 4 at an easy rate.
Computing circuit 45 is based on the load current value I of setting in Department of Communication Force 47
thsend the shutoff signal for earth leakage breaker 5.That is, computing circuit 45 by calculation process to the detection current value I exported from current measuring element 44a, 44b
1, I
2add up to, by the total of the detection current value of whole circuit and load current value I
thcompare, judge whether detect current value exceedes load current value I
th.Specifically, at I
1+ I
2>I
thwhen, computing circuit 45 exports the drive singal making output relay 48 action.
Output based on the drive singal from computing circuit 45, makes contacting output signal to signal output terminal 50 with relay 48.When output relay 48 the closing of contact and when connecting, the voltage from power circuit 49 is applied to signal output terminal 50, and outputs to holding wire 51 from signal output terminal 50 as shutoff signal.In the present embodiment, multiple output relay 48 for sending shutoff signal can be set, earth leakage breaker 5 and arbitrary branch circuit breaker 6 are controlled.In addition, shutoff signal sending part 52 is formed by these output relays 48, power circuit 49, signal output terminal 50 and holding wire 51.
The input terminal of power circuit 49 is connected with conductor 43a, 43b, 43c, and power circuit 49 accepts, from the power supply supply of circuit, the supply voltage of regulation is provided to computing circuit 45 and output relay 48.
Display part 53 comprises light-emitting component, the display lamps etc. such as the LED of the operating surface being arranged at current limiting device 4.When receiving the setting signal from the load current value of electric-power metering instrument 2 in Department of Communication Force 47 or according to the calculation process result of computing circuit 45 and when detecting overcurrent thus output shutoff signal, display part 53 carries out the luminescence display as shown in (a) of Fig. 2.Computing circuit 45 to output with relay 48 output drive signal while, provide power supply to be used as display to display part 53, make display part 53 luminous.The action of current limiting device 4 can be notified thus to user.
Timing unit 54 has the clocking capability based on the clock number from CPU etc.Shutoff signal sending part 52 has following functions: based on the control from computing circuit 45, preferentially sends shutoff signal to the specific branch circuit breaker 6 being connected with the large load of the power consumptions such as such as air-conditioning.Then, even if when the reduction of after-current of the set time that have passed through timing in timing unit 54 is also not enough, shutoff signal sending part 52 carries out the cutting-off controlling of the earth leakage breaker 5 as trunk cutter based on the control from computing circuit 45.Like this, current limiting device 4 first can cut off specific branch circuit breaker 6, is carrying out the cut-out of earth leakage breaker 5 after regular time.Therefore, when only cutting off branch circuit breaker 6 will be less than load current value without the need to cutting off trunk cutter, the inconvenience of the party in request that can avoid all having a power failure and so on.
As described above, in the distribution system 1 involved by present embodiment, can come easily setting to be carried out to the load current value of current limiting device 4 according to Department of Communication Force 47 from the setting signal that electric-power metering instrument 2 receives and change.Therefore, even if when the modification of contract of the load current value of current limiting device 4, also can party in request easily Long-distance Control is carried out to this load current value with extraterrestrial place and without the need to the number of working processes of operating personnel of electric power provider S, the on the scene of party in request.In addition, multiple load current value can set by current limiting device 4 with changing, even if therefore when the modification of contract of the load current value of current limiting device 4, also without the need to being replaced by other new current limiting device 4, thus the reduction of administrative expenses can be realized.
(variation 1)
Modified embodiment of the present embodiment 1 is described.In this variation 1, earth leakage breaker 5 and the branch circuit breaker 6 with cutting function have relay-set.By the mechanism of this relay-set, even if when detecting that any one circuit in overcurrent and earth leakage breaker 5 and branch circuit breaker 6 is cut-off, also can make for the time being load current reduce after according to the command signal sent from current limiting device 4, circuit is recovered.Thus, in this variation 1, except the effect of above-mentioned execution mode, labour and the time of party in request can also be saved further.In addition, about the opportunity using relay-set to make electric current recover, the algorithm (with reference to Japanese Unexamined Patent Publication 2010-148165 publication etc.) on the little regulation of the impact of party in request can be used.
(variation 2)
With reference to Fig. 3, modified embodiment of the present embodiment 2 is described.In this variation 2, as shown in Figure 3, current limiting device 4 is configured to become same module with branch circuit breaker 6.By this structure, in this variation 2, can the position fixed configurations current limiting device 4 of branch circuit breaker 6 being set, just can forming distribution system 1 without the need to preparing special fixed component, become cheap.In addition, the space for arranging current limiting device 4 in distribution board 3 can be saved, therefore, it is possible to realize further miniaturized.
In addition, the present invention is not limited to the structure of above-mentioned execution mode, can carry out various distortion in the scope of aim not changing invention.Such as, also can consider: current limiting device 4 has circuitry cuts portion, when detecting the overcurrent exceeding load current value in overcurrent test section 46, current limiting device 4 makes the particular electrical circuit dropout of self carry out circuitry cuts.
description of reference numerals
1: distribution system; 2: electric-power metering instrument; 3: distribution board; 4: current limiting device; 41a, 41b, 41c: power supply side terminal; 42a, 42b, 42c: load side terminal; 43a, 43b, 43c: conductor; 44,44a, 44b: current measuring element; 45: computing circuit (operational part); 46: overcurrent test section; 47: Department of Communication Force; 48: output relay; 49: power circuit; 50: signal output terminal; 51: holding wire; 52: shutoff signal sending part (signal transmission unit); 53: display part; 54: timing unit; 5: earth leakage breaker (trunk cutter); 6: branch circuit breaker (branch's cutter); 7: holding wire; S: electric power provider.
Claims (8)
1. a distribution system, possess electric-power metering instrument and distribution board, this electric-power metering instrument is inserted in circuit between electric power provider and party in request to measure electricity usage amount, this distribution board is connected with the circuit from this electric-power metering instrument, electric power is distributed in party in request, the feature of this distribution system is
The current limiting device that the electric current flowed in circuit is limited is provided with in above-mentioned distribution board,
This current limiting device possesses: overcurrent test section, its detect circuit voltage mutually in the vector of electric current of flowing exceed the situation of the load current value of regulation; Department of Communication Force, it is for communicating with above-mentioned electric-power metering instrument; And operational part, it is based on the setting signal got via above-mentioned Department of Communication Force, can be set with changing by the load current value of afore mentioned rules.
2. distribution system according to claim 1, is characterized in that,
Above-mentioned current limiting device also possesses signal transmission unit, and when detecting the situation of the load current value exceeding afore mentioned rules in above-mentioned overcurrent test section, this signal transmission unit sends shutoff signal to the cutter of outside.
3. distribution system according to claim 2, is characterized in that,
Above-mentioned signal transmission unit sends shutoff signal based on the instruction from above-mentioned operational part to trunk cutter.
4. the distribution system according to Claims 2 or 3, is characterized in that,
Above-mentioned current limiting device also possesses timing unit,
Above-mentioned signal transmission unit is based on the instruction from above-mentioned operational part, preferentially shutoff signal is sent to branch's cutter of regulation, even if when the reduction of after-current of the set time that have passed through timing in above-mentioned timing unit is also not enough, send shutoff signal to trunk cutter.
5. the distribution system according to any one in claim 2 to 4, is characterized in that,
Above-mentioned cutter is built-in with relay-set.
6. the distribution system according to any one in claim 1 to 5, is characterized in that,
Above-mentioned Department of Communication Force carries out any one in wire communication, radio communication and power line communication.
7. the distribution system according to any one in claim 1 to 6, is characterized in that,
Above-mentioned current limiting device is configured to become same module with branch cutter.
8. a current limiting device, is characterized in that, for the distribution system according to any one in the claims 1 to 7.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2013055862A JP2014183637A (en) | 2013-03-19 | 2013-03-19 | Power distribution system and current-limiting device |
| JP2013-055862 | 2013-03-19 | ||
| PCT/JP2014/000915 WO2014147959A1 (en) | 2013-03-19 | 2014-02-21 | Distribution system and current limiting device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105191038A true CN105191038A (en) | 2015-12-23 |
Family
ID=51579662
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201480016514.4A Pending CN105191038A (en) | 2013-03-19 | 2014-02-21 | Distribution system and current limiting device |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JP2014183637A (en) |
| CN (1) | CN105191038A (en) |
| WO (1) | WO2014147959A1 (en) |
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| JP5890564B1 (en) * | 2015-06-05 | 2016-03-22 | 光洋電子工業株式会社 | Distribution board system |
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| CN108476540A (en) * | 2016-02-18 | 2018-08-31 | 松下知识产权经营株式会社 | The wireless communication system of terminating machine and the control method and use of the terminating machine terminating machine |
| CN108476540B (en) * | 2016-02-18 | 2022-03-15 | 松下知识产权经营株式会社 | Terminal, method for controlling terminal, and wireless communication system using terminal |
| CN106451461A (en) * | 2016-10-20 | 2017-02-22 | 广东电网有限责任公司电力调度控制中心 | Load sharing start method and device of backup automatic switching devices |
| CN106451461B (en) * | 2016-10-20 | 2018-11-27 | 广东电网有限责任公司电力调度控制中心 | The load sharing of backup auto-activating device starts method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2014147959A1 (en) | 2014-09-25 |
| JP2014183637A (en) | 2014-09-29 |
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