CN205091392U - Three -phase equilibrium low -pressure measurement device - Google Patents
Three -phase equilibrium low -pressure measurement device Download PDFInfo
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- CN205091392U CN205091392U CN201520695112.3U CN201520695112U CN205091392U CN 205091392 U CN205091392 U CN 205091392U CN 201520695112 U CN201520695112 U CN 201520695112U CN 205091392 U CN205091392 U CN 205091392U
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Abstract
The utility model discloses a three -phase equilibrium low -pressure measurement device, its casing is fixed on the transformer, and the secondary low pressure of transformer goes out the terminal and draws inlet wire access three -phase equilibrium low -pressure measurement device, be equipped with intelligent monitor terminal, special combined mutual inductor and measurement ammeter in three -phase equilibrium low -pressure measurement device's the casing, the inlet wire connects subordinate's user side electric wire netting through the output of special combined mutual inductor, in case intelligent monitor terminal unbalanced three phase appears on detecting the circuit, send each load of looking at and appraising on the road of control command control phase change switch module adjustment and make three -phase circuit balanced again. Adopt the technical scheme of the utility model, owing to increase intelligent monitor terminal at the inlet wire end, can in time detect unbalanced three phase to rate according to unbalanced three phase and control phase change switch module adjustment line load, prevent user side electric fire's emergence from the source, simultaneously, adopt the cable mode of directly pouring into a mould to realize the line connection, stopped the emergence of my the electric circumstances on the transformer secondary post.
Description
Technical field
The utility model relates to high-voltage meter, particularly relates to a kind of low-voltage metering mechanism with three-phase equilibrium function.
Background technology
In prior art, be usually directly connected with three-phase electricity inlet wire for the low-voltage metering mechanism measured, once the faults such as electric leakage, short circuit appear in the electrical engineering of rear class user side, low-voltage metering mechanism will be caused to break down, even cause electrical fire.Particularly some electrical engineering is because of informal installation, and wire laying mode is chaotic, without lightning protection measures or lightning protection measures defective, various electric product is very different, and panel box Rig up error, very easily causes electric fault, causes electrical fire.How in real time the electric parameter of effective supervisory user end, the three-phase imbalance in time in adjustment circuit, prevents the generation of electrical fire from source, protection personal safety is the problem that this area will solve.
Therefore, for the above-mentioned defect existed in currently available technology, be necessary to study in fact, to provide a kind of scheme, solve the defect existed in prior art.
Utility model content
In view of this, necessaryly the three-phase equilibrium low-voltage metering mechanism that a kind of wiring is simple, have the functions such as three-phase equilibrium, anti-electricity-theft, auto-cutout is provided, to solve the problem proposed in above-mentioned background technology.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
The utility model discloses a kind of three-phase equilibrium low-voltage metering mechanism, the housing of described three-phase equilibrium low-voltage metering mechanism is fixing on the transformer, and the secondary low-voltage outlet column of described transformer is drawn inlet wire and accessed described three-phase equilibrium low-voltage metering mechanism;
Be provided with intelligent monitoring terminal, special combination mutual inductor and metering ammeter in the housing of described three-phase equilibrium low-voltage metering mechanism, described inlet wire exports through described special combination mutual inductor and connects subordinate subscriber end electrical network;
Described special combination mutual inductor is connected with described metering ammeter, for described metering ammeter provides power supply;
Described metering ammeter is used for the electricity of metering user end;
Whether described intelligent monitoring terminal there is three-phase imbalance for detecting end of incoming cables;
Described three-phase equilibrium low-voltage metering mechanism also comprises the multiple phase-change switch modules being arranged on user side load, and described phase-change switch module is for switching power supply phase road belonging to this load to adjust the power load on Ge Xiang road;
Once described intelligent monitoring terminal detects, and three-phase imbalance appears in circuit, send control command and control the load that described phase-change switch module adjusts on each phase road and make three-phase circuit rebalancing.
Preferably, described intelligent monitoring terminal comprises residual current transformer, signal amplification module, control module, field communications module and remote communication module, described residual current transformer is sleeved on inlet wire input end, its induction output terminal is connected with described signal amplification module, described control module is connected with described field communications module with described signal amplification module, and described field communications module and described phase-change switch module carry out data communication; Described control module detects the induction information of described residual current transformer and sends control command to described phase-change switch module according to this induction information by described field communications module, and described remote communication module is used for carrying out data communication with remote control center.
Preferably, the built-in wireless data transfer module of described metering ammeter, obtains the information of described metering ammeter wirelessly for outside Meter Reading Device.
Preferably, described metering ammeter is also connected with described intelligent monitoring terminal, and described intelligent monitoring terminal obtains the information of described metering ammeter and this information is sent to remote control center.
Preferably, described intelligent monitoring terminal also comprises mutual inductor and connects pick-up unit, and when described residual current transformer connects fault, described mutual inductor connects pick-up unit and this failure message is sent to described control module.
Preferably, described intelligent monitoring terminal is also provided with anti-electricity-theft control module, and described anti-electricity-theft control module is for monitoring illegal stealing.
Preferably, the secondary low-voltage outlet column of described transformer is fixed in inlet wire one end of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable, its other end is fixed on the housing of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable.
Preferably, the outlet of described three-phase equilibrium low-voltage metering mechanism is fixed on the housing of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable.
Preferably, described special combination mutual inductor is also provided with auxiliary wrapped, described auxiliary wrapped for providing power supply for described metering ammeter.
Preferably, described field communications module is any one in 485 field communications module, power line carrier field communications module or wireless communication module, and described remote communication module is any one of GPRS communication module, 3G communication module or 4G communication module.
Compared with prior art, a kind of three-phase equilibrium low-voltage metering mechanism that the utility model provides, owing to increasing intelligent monitoring terminal in end of incoming cables, three-phase imbalance can be detected in time, and by adjusting the power supply phase road of phase-change switch switch load, make three-phase circuit come back to three-phase equilibrium state, thus prevent the generation of user side electrical fire from source.
Accompanying drawing explanation
Fig. 1 is the mounting structure schematic diagram of the utility model three-phase equilibrium low-voltage metering mechanism.
Fig. 2 is the theory structure schematic diagram of the utility model three-phase equilibrium low-voltage metering mechanism.
Fig. 3 is the theory structure schematic diagram of another kind of embodiment in the utility model three-phase equilibrium low-voltage metering mechanism.
Fig. 4 is the theory diagram of intelligent monitoring terminal in the utility model three-phase equilibrium low-voltage metering mechanism.
Embodiment
Below with reference to accompanying drawing, a kind of the utility model three-phase equilibrium low-voltage metering mechanism that the utility model provides is described further.
See Fig. 1 and Fig. 2, be depicted as the structural representation of a kind of three-phase equilibrium low-voltage metering mechanism of the utility model, the housing of described three-phase equilibrium low-voltage metering mechanism is fixing on the transformer, and the secondary low-voltage outlet column of described transformer is drawn inlet wire and accessed described three-phase equilibrium low-voltage metering mechanism;
Be provided with intelligent monitoring terminal, special combination mutual inductor and metering ammeter in the housing of described three-phase equilibrium low-voltage metering mechanism, described inlet wire exports through described special combination mutual inductor and connects subordinate subscriber end electrical network;
Described special combination mutual inductor is connected with described metering ammeter, for described metering ammeter provides power supply; By special combination mutual inductor for metering ammeter directly provides power supply, and then external power supply or back-up source need not provide power supply for metering ammeter, enormously simplify connections, install and later maintenance more easy.Preferably, special combination mutual inductor is provided with auxiliary wrapped, calculates the auxiliary wrapped number of turns according to input voltage and required supply voltage, and wrappedly provides power supply for metering ammeter by auxiliary.
Described metering ammeter is used for the electricity of metering user end, the metering ammeter used in the utility model is multifunction electric meter, except function of measuring, voltage can also be detected, electric current, power, the electrical quantitys such as power factor, these electrical quantitys can be sent to remote control center by long-distance transcribe terminal, remote control center can monitor out overvoltage through data computational analysis, the accidents such as overcurrent, and then transmit control signal to long-distance transcribe terminal output trip signal to vacuum switch to cut off current supply circuit, thus branch road can have been cut off in time power, avoid feeding through to upper level transformer station, the available protecting safe operation of whole supply line, effectively prevent and be in operation because superpotential appears in circuit, excess current causes the bad of supervising device.
Whether described intelligent monitoring terminal there is three-phase imbalance for detecting end of incoming cables;
Described three-phase equilibrium low-voltage metering mechanism also comprises the multiple phase-change switch modules being arranged on user side load, and described phase-change switch module is for switching power supply phase road belonging to this load to adjust the power load on Ge Xiang road;
Once described intelligent monitoring terminal detects, and three-phase imbalance appears in circuit, send control command and control the load that described phase-change switch module adjusts on each phase road and make three-phase circuit rebalancing.Thus the generation of client electrical fire can be prevented from source.
The quantity of above-mentioned phase-change switch module is determined by the loading condition of actual branch circuit, each branched line is at least installed a phase-change switch module.The principle of work of phase-change switch module is as follows: once intelligent monitoring terminal detects three-phase imbalance in circuit, the unbalance factor of each phase can be calculated according to actual track parameter, such as A phase circuit power load is overweight, intelligent monitoring terminal sends control command to the phase-change switch module on each branch line of A phase, switch to B phase circuit and C phase circuit, thus make three-phase line rebalancing.
In prior art, checking meter of metering ammeter is checked meter in the mode of manually going on patrol usually, and also just the person of checking meter goes on patrol each metering ammeter one by one, and the numerical value of metering ammeter is read with human eye sense organ, adopt which, the person's of checking meter workload is large, and inefficiency and easily makeing mistakes.
See Fig. 3, be depicted as the structural representation of another kind of embodiment in the utility model three-phase equilibrium low-voltage metering mechanism, the built-in wireless data transfer module of described metering ammeter, obtains the information of described metering ammeter wirelessly for outside Meter Reading Device.Adopt the technical solution of the utility model, the person of checking meter realizes radio meter register by outside Meter Reading Device, easy and simple to handle and there will not be mistake of checking meter.Further, metering ammeter is also connected with described intelligent monitoring terminal, and described intelligent monitoring terminal obtains the information of described metering ammeter and this information is sent to remote control center.Adopt the technical solution of the utility model, realize remote meter reading by intelligent monitoring terminal, metrical information timing can be fed back to remote control center by metering ammeter, substantially increases meter reading efficiency.
In the prior art, the phenomenon of being stolen electricity by transformer and panel box is happened occasionally, and causes the heavy losses of property to Utilities Electric Co., steals electrical travelling for cause severe compromise to electrical network simultaneously.
In order to solve the problems of the technologies described above, be also provided with anti-electricity-theft control module in intelligent monitoring terminal, described anti-electricity-theft control module is for monitoring illegal stealing.Comprise the gate inhibition's switch on the chamber door being arranged on the utility model three-phase equilibrium low-voltage metering mechanism, anti-electricity-theft control module has the function of Omnibearing anti-electricity-theft, in conjunction with technique scheme, comprehensive stealing monitoring can be realized, thus stop the generation of electricity filching behavior.
Further, the secondary low-voltage outlet column of described transformer is fixed in inlet wire one end of three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable, its other end is fixed on the housing of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable; Same, the outlet of three-phase equilibrium low-voltage metering mechanism is fixed on the housing of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable.
Adopt directly cast cable mode to realize connection, cable directly enters the housing of three-phase equilibrium low-voltage metering mechanism after cast, thus without the need to arranging fixture splice, has stopped the generation of stealing situation on transformer secondary post.
See Fig. 4, be depicted as the theory diagram of intelligent monitoring terminal in the utility model three-phase equilibrium low-voltage metering mechanism, described intelligent monitoring terminal comprises residual current transformer, signal amplification module, control module, field communications module and remote communication module, described residual current transformer is sleeved on inlet wire input end, its induction output terminal is connected with described signal amplification module, described control module is connected with described field communications module with described signal amplification module, and described field communications module and described phase-change switch module carry out data communication; Described control module detects the induction information of described residual current transformer and sends control command to described phase-change switch module according to this induction information by described field communications module, and described remote communication module is used for carrying out data communication with remote control center.Specific works principle is: residual current transformer induction end exports faint current sensing signal, the phasor proportion relation of this current signal and three-phase inlet wire, and when three-phase complete equipilibrium, its value is zero.This current signal is after signal amplification module amplifies with certain proportion, control module is sampled this signal value, and then detect the induced signal of residual current transformer, when it exceeds certain threshold value, be judged as three-phase imbalance, and then the unbalance factor of every phase is gone out according to the electrical parameter calculation of each phase circuit, control module sends control command to phase-change switch module according to this information by field communications module, thus makes three-phase rebalancing.
The Cleaning Principle of residual current is as follows: in electrical network, if circuit does not occur to get an electric shock and leak current fault, according to electromagnetic induction principle, the phasor of three-phase inlet wire and be zero, magnetic flux phasor and equalling zero, the non-inductive electric current of mutual inductor exports, and line powering is normal.When circuit frees electric shock and leak current fault, the phasor of three-phase inlet wire and by non-vanishing, magnetic flux phasor and also non-vanishing, residual current transformer exports sensor current signal, become stable voltage signal through signal amplification module and peak detection module and export to control module, control module determines current leakage current situation according to the information received, and compare with the threshold value of setting, if current electrical leakage exceedes the threshold range of setting, show that current leakage current is bigger than normal, circuit is in the hole, control module controls isolating switch driver module output drive signal and cuts off vacuum circuit breaker, thus reach earth leakage protective object.
In a preferred embodiment, intelligent monitoring terminal also comprises mutual inductor and connects pick-up unit, and when residual current transformer connects fault, mutual inductor connects pick-up unit and this failure message is sent to control module.
In a preferred embodiment, intelligent monitoring terminal also comprises ups power, as standby power supply for intelligent monitoring terminal provides power supply, when line fault cannot be powered, intelligent monitoring terminal is powered by ups power, still line fault information can be sent to remote control center, overhaul in time to notify fault at once.
In a preferred embodiment, control module selects atmel corp AT90CAN series monolithic.AT90CAN series monolithic is 8 high-performance, Low-Power CMOS microprocessor based on AVRRISC structure, and interior band CAN protocol is simple to operate, and Resources on Chip enriches, and pin is sufficient, is applicable to design the various electric fire-control product based on CAN communication.
In a preferred embodiment, because intelligent monitoring terminal and phase-change switch module are not mounted in same casing, therefore, intelligent monitoring terminal and phase-change switch module adopt the mode of bus or wireless mode to be connected.Described field communications module is any one in 485 field communications module, power line carrier field communications module or wireless field communication module.
In a preferred embodiment, remote communication module is any one in GPRS module, 3G module or 4G module, for carrying out data communication with remote control center.Intelligent monitoring terminal gathers the information of metering ammeter, and by remote communication module, line parameter circuit value information and failure message is sent to remote control center, and remote control center sends control command according to these information to intelligent monitoring terminal.
The explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the utility model.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein when not departing from spirit or scope of the present utility model, can realize in other embodiments.Therefore, the utility model can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a three-phase equilibrium low-voltage metering mechanism, is characterized in that, the housing of described three-phase equilibrium low-voltage metering mechanism is fixing on the transformer, and the secondary low-voltage outlet column of described transformer is drawn inlet wire and accessed described three-phase equilibrium low-voltage metering mechanism;
Be provided with intelligent monitoring terminal, special combination mutual inductor and metering ammeter in the housing of described three-phase equilibrium low-voltage metering mechanism, described inlet wire exports through described special combination mutual inductor and connects subordinate subscriber end electrical network;
Described special combination mutual inductor is connected with described metering ammeter, for described metering ammeter provides power supply;
Described metering ammeter is used for the electricity of metering user end;
Whether described intelligent monitoring terminal there is three-phase imbalance for detecting end of incoming cables;
Described three-phase equilibrium low-voltage metering mechanism also comprises the multiple phase-change switch modules being arranged on user side load, and described phase-change switch module is for switching power supply phase road belonging to this load to adjust the power load on Ge Xiang road;
Once described intelligent monitoring terminal detects, and three-phase imbalance appears in circuit, send control command and control the load that described phase-change switch module adjusts on each phase road and make three-phase circuit rebalancing;
The secondary low-voltage outlet column of described transformer is fixed in inlet wire one end of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable, its other end is fixed on the housing of described three-phase equilibrium low-voltage metering mechanism in the mode of pouring into a mould cable;
The outlet of described three-phase equilibrium low-voltage metering mechanism is fixed in the mode of pouring into a mould cable on the housing of described three-phase equilibrium low-voltage metering mechanism;
Described special combination mutual inductor is also provided with auxiliary wrapped, described auxiliary wrapped for providing power supply for described metering ammeter.
2. three-phase equilibrium low-voltage metering mechanism according to claim 1, it is characterized in that, described intelligent monitoring terminal comprises residual current transformer, signal amplification module, control module, field communications module and remote communication module, described residual current transformer is sleeved on inlet wire input end, its induction output terminal is connected with described signal amplification module, described control module is connected with described field communications module with described signal amplification module, and described field communications module and described phase-change switch module carry out data communication; Described control module detects the induction information of described residual current transformer and sends control command to described phase-change switch module according to this induction information by described field communications module, and described remote communication module is used for carrying out data communication with remote control center.
3. three-phase equilibrium low-voltage metering mechanism according to claim 1 and 2, is characterized in that, the built-in wireless data transfer module of described metering ammeter, obtains the information of described metering ammeter wirelessly for outside Meter Reading Device.
4. three-phase equilibrium low-voltage metering mechanism according to claim 1 and 2, it is characterized in that, described metering ammeter is also connected with described intelligent monitoring terminal, and described intelligent monitoring terminal obtains the information of described metering ammeter and this information is sent to remote control center.
5. three-phase equilibrium low-voltage metering mechanism according to claim 2, it is characterized in that, described intelligent monitoring terminal also comprises mutual inductor and connects pick-up unit, and when described residual current transformer connects fault, described mutual inductor connects pick-up unit and this failure message is sent to described control module.
6. three-phase equilibrium low-voltage metering mechanism according to claim 2, is characterized in that, described intelligent monitoring terminal is also provided with anti-electricity-theft control module, and described anti-electricity-theft control module is for monitoring illegal stealing.
7. three-phase equilibrium low-voltage metering mechanism according to claim 2, it is characterized in that, described field communications module is any one in 485 field communications module, power line carrier field communications module or wireless communication module, and described remote communication module is any one of GPRS communication module, 3G communication module or 4G communication module.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520695112.3U CN205091392U (en) | 2015-09-10 | 2015-09-10 | Three -phase equilibrium low -pressure measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520695112.3U CN205091392U (en) | 2015-09-10 | 2015-09-10 | Three -phase equilibrium low -pressure measurement device |
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| CN205091392U true CN205091392U (en) | 2016-03-16 |
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| CN201520695112.3U Active CN205091392U (en) | 2015-09-10 | 2015-09-10 | Three -phase equilibrium low -pressure measurement device |
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