CN107356804A - A kind of three-phase electricity monitoring for protection circuit and its method of work - Google Patents
A kind of three-phase electricity monitoring for protection circuit and its method of work Download PDFInfo
- Publication number
- CN107356804A CN107356804A CN201710798724.9A CN201710798724A CN107356804A CN 107356804 A CN107356804 A CN 107356804A CN 201710798724 A CN201710798724 A CN 201710798724A CN 107356804 A CN107356804 A CN 107356804A
- Authority
- CN
- China
- Prior art keywords
- circuit
- phase
- governor
- voltage
- protection
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16547—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies voltage or current in AC supplies
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R29/00—Arrangements for measuring or indicating electric quantities not covered by groups G01R19/00 - G01R27/00
- G01R29/16—Measuring asymmetry of polyphase networks
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
-
- 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
-
- 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
- H02H3/02—Details
- H02H3/04—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned
- H02H3/042—Details with warning or supervision in addition to disconnection, e.g. for indicating that protective apparatus has functioned combined with means for locating the fault
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H5/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection
- H02H5/04—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature
- H02H5/041—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal non-electric working conditions with or without subsequent reconnection responsive to abnormal temperature additionally responsive to excess current
Abstract
The invention discloses a kind of three-phase electricity monitoring for protection circuit; including three-phase current sample circuit, three-phase voltage sample circuit, humiture sample circuit, governor circuit, controlling power circuit and working state indicating circuit; the controlling power circuit provides power supply for humiture sample circuit, governor circuit and working state indicating circuit; the governor circuit receives the signal of three-phase current sample circuit, three-phase voltage sample circuit and humiture sample circuit, and the working state indicating circuit is connected to the output end of governor circuit；The three-phase electricity monitoring for protection circuit also includes wireless transmission circuit, and the controlling power circuit provides power supply, the COM1 connection of the wireless transmission circuit and governor circuit for wireless transmission circuit.The present invention a kind of three-phase electricity monitoring for protection circuit and its method of work, can monitor in real time with the voltage and current in protection circuit, while by output signal control external electrical components on-off, so as to control the break-make of power supply.
Description
Technical field
The present invention relates to a kind of electronic circuit, more particularly to a kind of three-phase electricity monitoring for protection circuit and its method of work.
Background technology
Three-phase electricity is a kind of transporting pattern of electric energy, full name three-phase alternating-current supply, be one group amplitude is equal, frequency is equal,
Phase mutually differs 120 ° of three-phase electricity, is produced by the threephase generator of three windings.The purposes of three-phase electricity is a lot, big portion in industry
The AC electric equipment divided, such as motor, all using three-phase electricity, that is, the three-phase four-wire system frequently referred to.And daily
In life, more using single phase poaer supply, also referred to as power for illumination.Three-phase electricity uses in circuit, often causes because of power network fluctuation
Voltage x current increases or reduced within the specific limits, when the fluctuation of three-phase electricity exceedes the scope that equipment can bear, if electric
Protection part in road is not carried out, and component in equipment may be caused to be burned out damaging, so that whole equipment paralyses.
The content of the invention
The purpose of invention：The present invention discloses a kind of three-phase electricity monitoring for protection circuit, by voltage sample, gathers each phase voltage
Value, discriminate whether under-voltage, overvoltage, phase shortage, progress voltage protection；Each phase current is gathered by current transformer, discriminated whether
Excessively stream is carried, is protected accordingly；Leakage current is detected by ZCT, carries out earth leakage protective, while by the electricity of collection
Pressure and current value are transferred to remote server, and data are exercised supervision, store and analyzed with application.
Technical scheme：In order to realize the above object the invention discloses a kind of three-phase electricity monitoring for protection circuit, including three-phase
Current sampling circuit, three-phase voltage sample circuit, humiture sample circuit, governor circuit, controlling power circuit and working condition
Indicating circuit, the controlling power circuit provide power supply for humiture sample circuit, governor circuit and working state indicating circuit,
The governor circuit receives the signal of three-phase current sample circuit, three-phase voltage sample circuit and humiture sample circuit, described
Working state indicating circuit is connected to the output end of governor circuit；The three-phase electricity monitoring for protection circuit also includes being wirelessly transferred electricity
Road, the controlling power circuit provide power supply, the communication ends of the wireless transmission circuit and governor circuit for wireless transmission circuit
Mouth connection.Three-phase electricity monitoring for protection circuit of the present invention is in addition to the function with general circuit, moreover it is possible to realize control, telecommunication,
The remote intelligent function such as detection and protection.Electric current and voltage are more than specified in this three-phase electricity monitoring for protection circuit permission circuit
It is operated in value certain limit, when the electric current in circuit and voltage exceed power-off setting value, by being wirelessly transferred electricity
Road transmits a signal to governor circuit, and governor circuit will be according to being set for circuit protection, while realizes the storage monitoring of data
Function, whether can be normal operating value using the data of storage as electric current, voltage in parameter monitoring circuit.
Further, above-mentioned a kind of three-phase electricity monitoring for protection circuit, the output end of the governor circuit are provided with output signal
Circuit.In the output end setting signal protection circuit of three-phase electricity monitoring for protection circuit, when monitoring to have more than normal work in circuit
During the signal of work value, signal, control are sent to electric elements such as external contactor, relays by governor circuit control signal output
Electric elements processed disconnect, so as to carry out circuit protection.
Further, above-mentioned a kind of three-phase electricity monitoring for protection circuit, the three-phase electricity monitoring for protection circuit also include electric leakage
Sample circuit is protected, the input of the earth leakage protective sample circuit is connected with ZCT, the earth leakage protective sampling electricity
The output end on road is electrically connected with governor circuit.The leakage protection circuit of setting, monitoring for protection can be carried out to electric leakage in circuit, it is right
According to the value of remote preset to whether leaking electricity judgement after data-optimized processing, into corresponding processing subprogram, and record in real time
Current state.
Further, above-mentioned a kind of three-phase electricity monitoring for protection circuit, the three-phase voltage sample circuit is by voltage transformer
Sample circuit is formed with operational amplifier, the input of the voltage transformer is connected with three-phase voltage, and the three-phase voltage is adopted
The output end of sample circuit is electrically connected with governor circuit.Voltage sampling signal, to after data optimization processing according to remote preset
Whether value is to under-voltage, if overvoltage, if phase shortage etc. makes corresponding judgement, into corresponding processing subprogram, and remembers in real time
Record current state.
Further, a kind of above-mentioned three-phase electricity monitoring for protection circuit, the three-phase current sample circuit include Current Mutual Inductance
Device and operational amplifier, the input of the current transformer are connected with three-phase current, the three-phase current sample circuit it is defeated
Go out end to be electrically connected with governor circuit.Three road current sampling signals, to after data optimization processing according to the value of remote preset to being
No overload, if excessively stream etc. makes corresponding judgement, into corresponding processing subprogram, and records current state in real time.
Further, a kind of above-mentioned three-phase electricity monitoring for protection circuit, the humiture sample circuit include temperature and humidity sensing
Device.For the environment of real-time monitoring equipment operation, this equipment is surveyed by Temperature Humidity Sensor to temperature, the humidity at scene
Amount.
Further, above-mentioned a kind of three-phase electricity monitoring for protection circuit, the working state indicating circuit include three and lighted
Diode, the input of the working state indicating circuit are connected with controlling power circuit, the working state indicating circuit
Output end is connected with governor circuit.Using three light emitting diodes come the working condition of voltage and current in indicating circuit, normally
Green light during work, amber light is bright in the range of nominal parameter, excessively stream, lacuna, overvoltage, under-voltage, electric leakage situation when red.
Further, above-mentioned a kind of three-phase electricity monitoring for protection circuit, the controlling power circuit include transformer, rectification mould
Block and voltage-stablizer, the controlling power circuit provide positive and negative 5V and positive 3.3V power supplys, the power supply of the positive and negative 5V and governor circuit
Pin connects, and the pin of the positive 3.3V and wireless transmission circuit connect.AC380 is converted into AC220 by this controlling power circuit,
Rectification module is supplied to, is transformed into positive and negative 5V power supplys, by voltage will be positive 3.3V by voltage regulator module.
Further, the method for work of above-mentioned a kind of three-phase electricity monitoring for protection circuit, including the following course of work：
1）Controlling power circuit works, and is humiture sample circuit, governor circuit, wireless transmission circuit and working condition instruction electricity
Road provides working power；
2）Items are set data distributing to governor circuit by remote server by wireless transmission circuit；
3）Three-phase current sample circuit gathers each phase current of three-phase electricity, and current value is converted into corresponding voltage signal and is sent to
Governor circuit, overload flow is discriminated whether according to the value of remote preset by governor circuit, and circuit is protected accordingly, together
When data are reported by remote server by wireless transmission circuit, carry out the storage and supervision of data；
5）Three-phase voltage sample circuit gathers each phase voltage of three-phase electricity, converts voltage to corresponding voltage signal and is sent to master
Circuit is controlled, discriminates whether under-voltage, overvoltage, phase shortage according to the value of remote preset by governor circuit, and circuit is protected accordingly
Shield, while data are reported by remote server by wireless transmission circuit, carry out the storage and supervision of data；
6）Earth leakage protective sample circuit gathers leakage current, current value is sent into governor circuit, to root after data optimization processing
According to the value of remote preset to whether leaking electricity and judging, while data are reported by remote server by wireless transmission circuit,
And current state is recorded in real time；
7）The temperature and humidity value of humiture sample circuit collecting work environment, while reported data far by wireless transmission circuit
Journey server, and current state is recorded in real time；
8）In the circuit course of work working state indicating circuit work, as equipment detect excessively stream, overload, phase shortage, overvoltage, owe
Pressure, the situation of electric leakage, when red, governor circuit send a signal to output signal circuit, control external electrical components deenergization；
As equipment operates in the extreme position of nominal parameter, amber light is bright；When equipment is working properly, give a green light.
Above-mentioned technical proposal can be seen that the present invention and have the advantages that：A kind of three-phase electricity of the present invention is protected
Observation circuit and its method of work are protected, it is rational in infrastructure, sampled by the current sampling circuit of setting, voltage sampling circuit and electric leakage
Circuit gathers the voltage and current value of three-phase electricity, while data is reported into remote service end, using data storage as parameter value,
There is monitoring simultaneously, remote service end can also carry out parameter setting, can also lead to using this three-phase electricity monitoring for protection circuit
Output signal control electrical equipment is crossed, so as to control the disconnection of three-phase electricity, circuit is formed and protected.
Brief description of the drawings
Fig. 1 is a kind of circuit block diagram of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 2 is a kind of governor circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 3 is a kind of three-phase current sample circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 4 is a kind of three-phase voltage sample circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 5 is a kind of earth leakage protective sample circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 6 is a kind of humiture sample circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 7 is a kind of controlling power circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 8 is a kind of working state indicating circuit figure of three-phase electricity monitoring for protection circuit of the present invention；
Fig. 9 is a kind of wireless transmission circuit figure of three-phase electricity monitoring for protection circuit of the present invention.
In figure：1 three-phase current sample circuit, 2 three-phase voltage sample circuits, 3 humiture sample circuits, 4 governor circuits, 5
Controlling power circuit, 6 wireless transmission circuits, 7 working state indicating circuits, 8 output signal circuits, 9 earth leakage protective sample circuits.
Embodiment
Below in conjunction with the accompanying drawings, the specific embodiment of the invention is described in detail.
Embodiment
A kind of three-phase electricity monitoring for protection circuit and its method of work of the present invention, as shown in figure 1, being sampled including three-phase current
Circuit 1, three-phase voltage sample circuit 2, humiture sample circuit 3, governor circuit 4, controlling power circuit 5 and working condition instruction
Circuit 7, the controlling power circuit 5 are that humiture sample circuit 3, governor circuit 4 and working state indicating circuit 7 provide electricity
Source, the governor circuit 4 receive the letter of three-phase current sample circuit 1, three-phase voltage sample circuit 2 and humiture sample circuit 3
Number, the working state indicating circuit 7 is connected to the output end of governor circuit 4；The three-phase electricity monitoring for protection circuit also includes
Wireless transmission circuit 6, the controlling power circuit 5 are that wireless transmission circuit 6 provides power supply, the wireless transmission circuit 6 and master
The COM1 connection of circuit 4 is controlled, the wireless transmission circuit 6 uses WIFI or GPS RFDCs.As shown in Fig. 2
The main element of governor circuit 4 is single-chip microcomputer, and the present invention is using STC15W401AS series monolithics.Wherein, the master
The output end of control circuit 4 is provided with output signal circuit 8, connects out output signal circuit 8 by the OUT1 of governor circuit 4, this is defeated
Go out signal circuit 8 by controlling the connection of external electrical components to disconnect, so as to control the break-make of three-phase electricity, carry out circuit protection.
Further, as shown in figure 5, the three-phase electricity monitoring for protection circuit also includes earth leakage protective sample circuit 9, the earth leakage protective
The input of sample circuit 9 is connected with ZCT, output end and the electricity of governor circuit 4 of the earth leakage protective sample circuit 9
Property connection, the output of wherein ZCT accesses operational amplifier U10A two inputs by interface XS1, one of them
Branch road produces Liang Ge branches and passes through C34 and R34 respectively, is connected with operational amplifier U10A output terminals A DC7, operational amplifier
The input of U10A output terminals A DC7 access governor circuits 4.Further, as shown in figure 4, the three-phase voltage sample circuit
2 form sample circuit by voltage transformer and operational amplifier, and the input of the voltage transformer is connected with three-phase voltage, institute
The output end and governor circuit 4 for stating three-phase voltage sample circuit 2 are electrically connected with.Wherein, the U phases of three-phase voltage are connect by resistance R7
Enter voltage transformer TSV1 one end, V phases access the voltage transformer TSV1 other ends, voltage transformer TSV1 two output ends
Operational amplifier U4A input is accessed, voltage transformer TSV1 one of branch road produces Liang Ge branches and passes through C21 respectively
And R21, it is connected to operational amplifier U4A output terminals A DC4, operational amplifier U4A output terminals A DC4 access governor circuits 4
Input；In addition, the V phases of three-phase voltage access voltage transformer TSV2 one end by resistance R8, W phases access mutual induction of voltage
The device TSV2 other ends, voltage transformer TSV2 two output ends access operational amplifier U5A input, voltage transformer
TSV2 one of branch road produces Liang Ge branches respectively by C22 and R22, is connected to operational amplifier U5A output end
The input of ADC5, operational amplifier U5A output terminals A DC5 access governor circuits 4；Again, the U phases of three-phase voltage pass through electricity
R9 access voltage transformer TSV3 one end is hindered, W phases access the voltage transformer TSV3 other ends, and two of voltage transformer TSV3 are defeated
Go out the input terminated into operational amplifier U6A, voltage transformer TSV3 one of branch road produces Liang Ge branches and led to respectively
C23 and R23 are crossed, is connected to operational amplifier U6A output terminals A DC6, operational amplifier U6A output terminals A DC6 access master controls
The input of circuit 4；In addition, the voltage transformer used is TVA1421 series, operational amplifier TL082.Further, such as
Shown in Fig. 3, the three-phase current sample circuit 1 includes current transformer and operational amplifier, the input of the current transformer
End is connected with three-phase current, and output end and the governor circuit 4 of the three-phase current sample circuit 1 are electrically connected with.Wherein, electric current is mutual
Sensor TSA1 two output ends are respectively connected to operational amplifier U7A two inputs, and wherein the one of current transformer TSA1
Individual branch road produces Liang Ge branches and passes through C31 and R31 respectively, is connected with operational amplifier U7A output terminals A DC1, operational amplifier
The input of U7A output terminals A DC1 access governor circuits 4；In addition, current transformer TSA2 two output ends are respectively connected to
Operational amplifier U8A two inputs, current transformer TSA2 one of branch road produce Liang Ge branches and pass through C32 respectively
And R32, it is connected with operational amplifier U8A output terminals A DC2, operational amplifier U8A output terminals A DC2 access governor circuits 4
Input；Current transformer TSA3 two output ends are respectively connected to operational amplifier U9A two inputs, Current Mutual Inductance
Device TSA3 one of branch road produces Liang Ge branches and passes through C33 and R33, the output terminals A DC3 with operational amplifier U9A respectively
Connection, the input of operational amplifier U9A output terminals A DC3 access governor circuits 4；In addition, the current transformer used for
TVA1421B series, operational amplifier TL082.7 signal values that above-mentioned ADC1-ADC7 is formed, with the list in governor circuit 4
Piece machine input connection, for gather over-pressed, under-voltage, phase shortage, excessively stream, overload and electric leakage situations such as.Further, such as Fig. 6
Shown, the humiture sample circuit 4 includes Temperature Humidity Sensor, and the temperature and humidity at scene is entered by Temperature Humidity Sensor
Row measurement.Further, as shown in figure 9, the working state indicating circuit 7 includes three light emitting diodes, the work shape
The input of state indicating circuit 7 is connected with controlling power circuit 5, output end and the master control electricity of the working state indicating circuit 7
Road 4 connects.Wherein, diode LD51 one end is connected by resistance R46 with the positive 5V voltages V5 of controlling power circuit 5, another
End is connected with the OUT2 of governor circuit 4；In addition, diode LD52 one end passes through resistance R47 and the positive 5V of controlling power circuit 5
Voltage V5 connections, the other end are connected with the OUT3 of governor circuit 4；Diode LD53 one end passes through resistance R48 and control power supply
The positive 5V voltages V5 connections of circuit 5, the other end are connected with the OUT4 of governor circuit 4；Red, yellow and green tri-colour LED is formed, is used
Working condition in indicating circuit.Further, as shown in fig. 7, the controlling power circuit 5 includes transformer, rectification mould
Block and voltage-stablizer, the controlling power circuit 5 provide positive and negative 5V and positive 3.3V power supplys, the positive and negative 5V and governor circuit 4 electricity
Source capsule pin is connected, and the positive 3.3V is connected with the pin of wireless transmission circuit 6.Wherein, AC380 is converted into by transformer T1
AC220, AC220 access rectification module M1 L and N both ends, output end form positive and negative 5V power supplys, positive 5V electricity by electric capacity C1-C4
Voltage-stablizer M2 is accessed in source ,+5V voltages is reduced into+3.3V, the positive and negative 5V and positive 3V of formation provide electricity for the other parts in circuit
Source.
A kind of method of work of above-mentioned three-phase electricity monitoring for protection circuit, including the following course of work：
1）Controlling power circuit 5 works, and refers to for humiture sample circuit 4, governor circuit 4, wireless transmission circuit 6 and working condition
Show that circuit 7 provides working power；
2）Items are set data distributing to governor circuit 4 by remote server by wireless transmission circuit 6；
3）Three-phase current sample circuit 1 gathers each phase current of three-phase electricity, and current value is converted into corresponding voltage signal sends
To governor circuit 4, overload flow is discriminated whether according to the value of remote preset by governor circuit 4, and circuit is protected accordingly
Shield, while data are reported by remote server by wireless transmission circuit 6, carry out the storage and supervision of data；
4）Three-phase voltage sample circuit 2 gathers each phase voltage of three-phase electricity, converts voltage to corresponding voltage signal and is sent to
Governor circuit 4, under-voltage, overvoltage, phase shortage are discriminated whether according to the value of remote preset by governor circuit 4, and circuit is carried out corresponding
Protection, while data are reported by remote server by wireless transmission circuit 6, carry out the storage and supervision of data；
5）Earth leakage protective sample circuit 9 gathers leakage current, current value is sent into governor circuit 4, after data optimization processing
According to the value of remote preset to whether leaking electricity and judging, while data are reported by remote service by wireless transmission circuit 6
Device, and current state is recorded in real time；
6）The temperature and humidity value of the collecting work environment of humiture sample circuit 4, while reported data by wireless transmission circuit 6
Remote server, and current state is recorded in real time；
7）Working state indicating circuit 7 works in the circuit course of work, as equipment detect excessively stream, overload, phase shortage, overvoltage,
Under-voltage, electric leakage situation, when red, governor circuit 4 send a signal to output signal circuit 8, and control external electrical components disconnect
Power supply；As equipment operates in the extreme position of nominal parameter, amber light is bright；When equipment is working properly, give a green light.
A kind of method of work of three-phase electricity monitoring for protection circuit described above, the three-phase current sample circuit 1, three-phase electricity
Press the protection of sample circuit 2, earth leakage protective sample circuit 9 and humiture sample circuit 3, including following process：
1）Under-voltage protection：Entered according to the sampled value of three-phase voltage sample circuit 2 and the under-voltage zones values pre-set and brownout threshold
Row compares, and such as the measured value within the defined time in under-voltage area, amber light is bright；More than brownout threshold, then when red, drives simultaneously
The dynamic output signal circuit 8 being connected with peripheral electrical element, control electrical equipment is cut off the electricity supply, while is warned in remote port；
2）Overvoltage protection：According to the sampled value of three-phase voltage sample circuit 2 and the over-pressed zones values that pre-set and overvoltage threshold, such as
For measured value within the defined time in overpressure zone, amber light is bright；Super overvoltage threshold, then when red, while drive and periphery electricity
The output signal circuit 8 of gas element connection, control electrical equipment is cut off the electricity supply, while is warned in remote port；
3）Open-phase protection：According to the sampled value of three-phase voltage sample circuit 2, if in measured value three-phase voltage any one phase have it is low
In defined voltage, then it is judged as phase shortage, then when red, while the output signal circuit 8 that driving is connected with peripheral electrical element,
Control electrical equipment is cut off the electricity supply, while is warned in remote port；
4）Overcurrent protection：According to the sampled value of three-phase current sample circuit 1 and the excessively stream threshold value that pre-sets, such as when defined
Interior measured value is in excessively stream area, then when red, while the output signal circuit 8 that driving is connected with peripheral electrical element, control
Electrical equipment is cut off the electricity supply, while is warned in remote port；
5）Overload protection：According to the sampled value of three-phase current sample circuit 1 and three-phase voltage sample circuit 2 and pre-set
Rated power section, such as value within the defined time exceed rated power, then when red, while drive and peripheral electrical element
The output signal circuit 8 of connection, control electrical equipment is cut off the electricity supply, while is warned in remote port；
6）Thermal protection：According to the sampled value of humiture sample circuit 3 and its security interval pre-set, such as when defined
Interior value exceedes defined temperature, then when red, while the output signal circuit 8 that driving is connected with peripheral electrical element, control
Electrical equipment processed is cut off the electricity supply, while is warned in remote port；
7）Earth leakage protective：The leakage current sampled according to earth leakage protective sample circuit 9 and its security interval pre-set,
Value such as within the defined time exceedes defined place of safety, then when red, at the same driving be connected with peripheral electrical element it is defeated
Go out signal circuit 8, control electrical equipment is cut off the electricity supply, while is warned in remote port.
Described above is only the preferred embodiment of the present invention, it should be noted that for those skilled in the art
For, under the premise without departing from the principles of the invention, some improvement can also be made, these improvement also should be regarded as the guarantor of the present invention
Protect scope.
Claims (9)
- A kind of 1. three-phase electricity monitoring for protection circuit, it is characterised in that：Including three-phase current sample circuit（1）, three-phase voltage sampling Circuit（2）, humiture sample circuit（3）, governor circuit（4）, controlling power circuit（5）And working state indicating circuit（7）, institute State controlling power circuit（5）For humiture sample circuit（3）, governor circuit（4）And working state indicating circuit（7）Electricity is provided Source, the governor circuit（4）Receive three-phase current sample circuit（1）, three-phase voltage sample circuit（2）With humiture sample circuit （3）Signal, the working state indicating circuit（7）It is connected to governor circuit（4）Output end；The three-phase electricity monitoring for protection circuit also includes wireless transmission circuit（6）, the controlling power circuit（5）To be wirelessly transferred Circuit（6）Power supply, the wireless transmission circuit are provided（6）With governor circuit（4）COM1 connection.
- A kind of 2. three-phase electricity monitoring for protection circuit according to claim 1, it is characterised in that：The governor circuit（4）'s Output end is provided with output signal circuit（8）.
- A kind of 3. three-phase electricity monitoring for protection circuit according to claim 1, it is characterised in that：The three-phase electricity monitoring for protection Circuit also includes earth leakage protective sample circuit（9）, the earth leakage protective sample circuit（9）Input and ZCT connect Connect, the earth leakage protective sample circuit（9）Output end and governor circuit（4）It is electrically connected with.
- A kind of 4. three-phase electricity monitoring for protection circuit according to claim 1, it is characterised in that：The three-phase voltage sampling electricity Road（2）Sample circuit is formed by voltage transformer and operational amplifier, input and the three-phase voltage of the voltage transformer connect Connect, the three-phase voltage sample circuit（2）Output end and governor circuit（4）It is electrically connected with.
- A kind of 5. three-phase electricity monitoring for protection circuit according to claim 4, it is characterised in that：The three-phase current sampling electricity Road（1）Including current transformer and operational amplifier, the input of the current transformer is connected with three-phase current, the three-phase Current sampling circuit（1）Output end and governor circuit（4）It is electrically connected with.
- A kind of 6. three-phase electricity monitoring for protection circuit according to claim 5, it is characterised in that：The humiture sample circuit （3）Including Temperature Humidity Sensor.
- A kind of 7. three-phase electricity monitoring for protection circuit according to claim 6, it is characterised in that：The working condition instruction electricity Road（7）Including three light emitting diodes, the working state indicating circuit（7）Input and controlling power circuit（5）Connection, The working state indicating circuit（7）Output end and governor circuit（4）Connection.
- A kind of 8. three-phase electricity monitoring for protection circuit according to claim 7, it is characterised in that：The controlling power circuit （5）Including transformer, rectification module and voltage-stablizer, the controlling power circuit（5）Positive and negative 5V and positive 3.3V power supplys are provided, it is described Positive and negative 5V and governor circuit（4）Power pin connection, the positive 3.3V and wireless transmission circuit（6）Pin connection.
- A kind of 9. method of work of three-phase electricity monitoring for protection circuit according to claim any one of 1-8, it is characterised in that：1）Controlling power circuit（5）Work, is humiture sample circuit（3）, governor circuit（4）, wireless transmission circuit（6）And work Make condition indication circuit（7）Working power is provided；2）Remote server passes through wireless transmission circuit（6）Items are set into data distributing to governor circuit（4）；3）Three-phase current sample circuit（1）Each phase current of three-phase electricity is gathered, current value is converted into corresponding voltage signal sends out It is sent to governor circuit（4）, by governor circuit（4）Overload flow is discriminated whether according to the value of remote preset, and phase is carried out to circuit The protection answered, while pass through wireless transmission circuit（6）Data are reported into remote server, carry out the storage and supervision of data；4）Three-phase voltage sample circuit（2）Each phase voltage of three-phase electricity is gathered, corresponding voltage signal is converted voltage to and sends To governor circuit（4）, by governor circuit（4）Under-voltage, overvoltage, phase shortage are discriminated whether according to the value of remote preset, and circuit is entered The corresponding protection of row, while pass through wireless transmission circuit（6）Data are reported into remote server, carry out storage and the prison of data Superintend and direct；5）Earth leakage protective sample circuit（9）Leakage current is gathered, current value is sent to governor circuit（4）, to data-optimized place According to the value of remote preset to whether leaking electricity and judging after reason, while pass through wireless transmission circuit（6）Data are reported far Journey server, and current state is recorded in real time；6）Humiture sample circuit（3）The temperature and humidity value of collecting work environment, while pass through wireless transmission circuit（6）By in data Remote server is offered, and records current state in real time；7）The working state indicating circuit in the circuit course of work（7）Work, as equipment detects excessively stream, overload, phase shortage, mistake Pressure, under-voltage, electric leakage situation, when red, governor circuit（4）Send a signal to output signal circuit（8）, control external electrical member Part deenergization；As equipment operates in the extreme position of nominal parameter, amber light is bright；When equipment is working properly, give a green light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798724.9A CN107356804A (en) | 2017-09-07 | 2017-09-07 | A kind of three-phase electricity monitoring for protection circuit and its method of work |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710798724.9A CN107356804A (en) | 2017-09-07 | 2017-09-07 | A kind of three-phase electricity monitoring for protection circuit and its method of work |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107356804A true CN107356804A (en) | 2017-11-17 |
Family
ID=60290969
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710798724.9A Pending CN107356804A (en) | 2017-09-07 | 2017-09-07 | A kind of three-phase electricity monitoring for protection circuit and its method of work |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107356804A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923379A (en) * | 2018-09-28 | 2018-11-30 | 广东绿网新能源科技有限公司 | Overcurrent and phase shortage the broken string TT&C system of electric car charging circuit |
| CN109343386A (en) * | 2018-09-29 | 2019-02-15 | 杭州电子科技大学 | A kind of three phase circuit power monitoring device based on Internet of Things |
| CN109470995A (en) * | 2018-11-16 | 2019-03-15 | 武汉特试特科技股份有限公司 | A kind of distribution low-voltage cable junction box state monitoring apparatus and method for early warning |
| CN114236372A (en) * | 2021-11-18 | 2022-03-25 | 中核检修有限公司 | Nuclear power station power distribution system running state monitoring device and method |
-
2017
- 2017-09-07 CN CN201710798724.9A patent/CN107356804A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108923379A (en) * | 2018-09-28 | 2018-11-30 | 广东绿网新能源科技有限公司 | Overcurrent and phase shortage the broken string TT&C system of electric car charging circuit |
| CN108923379B (en) * | 2018-09-28 | 2024-03-22 | 广东绿网新能源科技有限公司 | Overcurrent and open-phase line breakage measurement and control system of electric automobile charging line |
| CN109343386A (en) * | 2018-09-29 | 2019-02-15 | 杭州电子科技大学 | A kind of three phase circuit power monitoring device based on Internet of Things |
| CN109343386B (en) * | 2018-09-29 | 2024-02-09 | 杭州电子科技大学 | Three-phase circuit power monitoring device based on Internet of things |
| CN109470995A (en) * | 2018-11-16 | 2019-03-15 | 武汉特试特科技股份有限公司 | A kind of distribution low-voltage cable junction box state monitoring apparatus and method for early warning |
| CN114236372A (en) * | 2021-11-18 | 2022-03-25 | 中核检修有限公司 | Nuclear power station power distribution system running state monitoring device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205681098U (en) | Three pole earth leakage protective devices | |
| CN107356804A (en) | A kind of three-phase electricity monitoring for protection circuit and its method of work | |
| CN106291201A (en) | The lightning monitoring of a kind of lightning protection box and deterioration state monitoring system and method | |
| CN105680416B (en) | Residual current operated protective device | |
| CN107449983A (en) | A kind of transformer synthesis device for detecting temperature of infrared view identification | |
| CN104680712A (en) | Anti-trampling prewarning system for people crowded region and implementation method for anti-treading prewarning system | |
| CN107390054A (en) | A kind of surge protector intelligent online monitoring system | |
| CN109217468A (en) | A kind of intelligent terminal box and electricity consumption observing and controlling and auditing system | |
| CN205811520U (en) | The open phase protection that multiple redundancy Intelligent live amount shows | |
| CN114696459A (en) | Monitoring system of intelligent circuit breaker | |
| CN206057461U (en) | A kind of lightning monitoring and deterioration state monitoring system of lightning protection box | |
| CN110071555A (en) | A kind of batteries management system | |
| CN107370122A (en) | A kind of intelligent contactor and its method of work | |
| CN209948789U (en) | Power distribution monitoring system | |
| CN207218220U (en) | A kind of intelligent contactor | |
| CN105896473A (en) | Open-phase protection device having a function of multi-redundancy intelligent carried charge display and control method of open-phase protection device | |
| CN207215895U (en) | A kind of three-phase electricity monitoring for protection circuit | |
| CN202814597U (en) | High-voltage power transmission line temperature measuring system | |
| CN206389179U (en) | A kind of cell distribution monitoring system | |
| CN208888613U (en) | A kind of Internet of Things protection against electric shock monitor terminal | |
| CN104836189B (en) | It is a kind of can Self-resetting and remote reset electric protective device and its method | |
| CN208984690U (en) | A kind of intelligent monitoring and inspection terminal box | |
| CN106602720A (en) | Short message alarm system and method based on EMS platform | |
| CN207181580U (en) | Broken neutral line indicator | |
| CN207424155U (en) | Power failure detection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171117 |