CN105610123A - Ammeter used relay having electric leakage protection function - Google Patents
Ammeter used relay having electric leakage protection function Download PDFInfo
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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
- H02H3/26—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents
- H02H3/32—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 difference between voltages or between currents; responsive to phase angle between voltages or between currents involving comparison of the voltage or current values at corresponding points in different conductors of a single system, e.g. of currents in go and return conductors
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Abstract
A ammeter used relay having an electric leakage protection function comprises a shell and an electrical device, wherein the shell is divided into two parts of a top cover (8) and a base (25), a space between the top cover (8) and the base (25) is an installation chamber, a circuit board serving as an installation base plate (14) is arranged at the top of the chamber, indication lamps (15), buttons (16), a shift (17) and an ammeter interface contact element (13) are arranged on the installation base plate, installation holes for components such as the indication lamps are formed at corresponding positions of the top cover, incoming and outgoing posts (24), magnetic latching relays (22), current transformers (19), a zero sequence transformer (21) and the like are arranged in the base, and the electrical device comprises a power circuit (2), a master control chip circuit (5), a communication and control circuit (1), an indication lamp circuit (3) and a sampling circuit (4). The relay is arranged on a three-phase four-wire low-voltage circuit, automatic load control and electric leakage protection can be achieved for a power user, and automatic switch-on also can be remotely controlled. The relay has the advantages of small size, time saving, labor saving, safety and efficiency, and can be installed in a universal ammeter box.
Description
Technical field
The present invention relates to a kind of external ammeter that coordinates intelligent electric meter to realize earth leakage protective, remote control combined floodgate and expense control functionSpecial purpose relay.
Background technology
In recent years along with the develop rapidly of Chinese national economy, emerge large quantities of to be processed as main middle-size and small-size enterpriseIndustry; Along with deepening continuously of town planning construction process, the development of real estate cause has obtained advances by leaps and bounds, and has successively occurred largeLarge slight all types of residential quarters; Good employment environment actively promotes resident living level to improve constantly. And it is above allThese all be unable to do without this overall situation of electricity consumption, and all trades and professions are more and more higher to the requirement of power supply quality, power supply quantity thus, to supplyingThe dependence of electricity is more and more stronger. Meanwhile, a series of electricity consumption dispute, the toll administration problem layers of supplying that cause due to power supply managementGo out not poor. Therefore, continue to improve the line end management of power use, introduce first and then practical low-voltage variation equipment is current primaryTask is also the shortcut rationally solving for electricity consumption dispute and the harmonious power utilization environment of establishment.
Intelligent electric meter take control function for realizing, special design built-in load control switch, be used for controlling and cut-out useElectricity end major loop. Although there is simple in structure, cost-saving advantage, because this kind of built-in on-load switch is greatly limitedIn the compact structure size of ammeter own, can only adopt the executing agency that make-break capacity is lower, in the time cut-offfing compared with high current load,Very easily damage intelligent electric meter itself. Now need to change whole ammeter, cause the consumption of a large amount of human and material resources.
Existing prepayment breaker in the market, because wiring, networking are too complicated loaded down with trivial details, when subscriber arrearage tripping operationOr after line fault tripping operation, all need artificial on-site manual reset to close a floodgate and can continue power supply, make undoubtedly being aligned electrician's realityBorder workload increases greatly, and therefore its practicality is not high.
1998,2010 the twice scale upgrading of rural power grids that continue, China's rural low voltage network assumes an entirely new aspect. For continuingAdvance and deeply carry out the improvement project of rural power grids, especially strengthen the Perfect the work to line end protection, China for the third timeUpgrading of rural power grids upgrading engineering immediately. National Development and Reform Commission issues " about implementing new round rural area electricity during " 13 "The notice of net transformation and upgrade engineering suggestion " in explicitly call for, to the year two thousand twenty, national rural area is realized reliable and stable confession substantiallyElectricity service all standing, power supply capacity and service level obviously promote, and rural power grids power supply reliability reaches 99.8%, integrated voltageQualification rate reaches 97.9%, and capacity of distribution transform is not less than 2 kilovolt-amperes per family, built structures rationally, advanced technology, safe and reliable, intelligenceModern countryside electrical network efficiently, the proportion of electric energy in household energy consumption structure in the countryside significantly improves.
Along with China's upgrading of rural power grids work constantly advances and gos deep into, for meeting the actual needs of economic development, resident living,Thoroughly solve the problem that exists in current line end electric power system in the urgent need to. Therefore, in current promotion social developmentUnder the overall situation of upgrade of rural power grids, start research in good time and implement the special purpose relay coordinating with intelligent electric meter, be that comply with oughtFront electric network reconstruction development situation is very necessary. This will bring huge Social benefit and economic benefit, contribute to intoOne-step optimization electric network composition, actively improves actual power quality, General Promotion power supply service level. Through retrieval and market survey,Not yet find that there is the relay closing a floodgate with the matching used load control of intelligent electric meter, with creepage protection function and RemoteData report and material object appear on the market.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of ammeter special purpose relay with creepage protection function. This relayDevice coordinates with intelligent watt-hour meter, utilizes the break-make of ammeter output electric shock signal, and common realization taken control function, controls electricity consumption endActual electricity consumption situation. Mainly be applicable to exchange 50/60Hz, rated operational voltage 220V/380V and following, rated current≤125AThree-phase and four-line low-voltage circuit, by the detection to ammeter output control signal, be used for coordinating ammeter management, control power loadOutput, round Realization arrearage tripping operation, the automatic control and the online measuring ability of duty that continue to pay dues and close a floodgate, also can be to circuit or useThe faults such as the ground connection, electric leakage, overcurrent, overvoltage/undervoltage of electricity equipment shield.
Solve the problems of the technologies described above and adopt following technical scheme: this ammeter special purpose relay with creepage protection function, bagDraw together shell and electrical installation, shell is divided into top cover and base two parts, and interior space is between the two installation room, presses close to top in top coverIt is circuit circuit board that wall is provided with substrate, has indicator lamp, button, gear, ammeter interface to touch part on substrate, and the corresponding position of top cover hasIndicator lamp installing hole, button installing hole, gear installing hole and ammeter interface, also have switch installing hole, inlet wire post and go out on top coverTerminal installing hole, is provided with inlet wire post and outlet column in the base of shell, three magnetic latching relays, power transformer, threeCurrent transformer and a ZCT; Electrical installation comprises power circuit, main control chip circuit, communication and control circuit,Indicator light circuit, sample circuit; Power circuit single phase ac 220V input is through transformer pressure-reducing, then bridge heap carries out rectification and becomesDirect current, exports 5V by regulator block, for main control chip circuit, communication and control circuit, indicator light circuit and sample circuit provideStable 5V power supply and 12V power supply; The output of interchange 12V in power circuit is connected to the optocoupler output of sample circuit;
Main control chip circuit connects the data input pin of the middle RS485 chip of communication and control circuit, connects communication and controls electricityThe data input pin of road Control chip, the output of connection communication and control circuit external control, connects communication and controlThe output of circuit DIP switch processed;
Main control chip circuit connects indicator light circuit input control end;
Main control chip circuit connects the output of the electric leakage sampling of sample circuit, and it is defeated that the three-phase current of connection sample circuit is sampledGo out end, connect the output of the electric leakage sampling of sample circuit, connect the output of the synchronization signal detection of sample circuit.
The outer bottom of described base is provided with location card article.
Power circuit circuit board is also installed in described installation room.
The appearance and size of described shell is wide 7-12 ㎝, the long 11-17 ㎝ of base, overall high 6-10 ㎝.
In described power circuit, single-phase alternating current LA, LN is depressured to and exchanges 12V through transformer T1 respectively, exchanges 12VBe connected to the output of the optocoupler IC5 of sample circuit, exchange 12V simultaneously after TVS pipe D1 protects, then through the heap of passing a bridgeBRG1 carries out rectification and becomes direct current 12V, and direct current 12V is connected to the power supply of the Control chip IC 2 of communication and control circuitEnd, simultaneously direct current 12V capacitor C 1 after filtering again, C2, C3, C5 is connected to regulator block U1 input, and regulator block U1 exports direct current5V is capacitor C 6 after filtering, and C7 is connected to indicator light circuit, communication and control circuit, sample circuit and main control chip circuit;
Described communication and control circuit be by Control chip IC 2, RS485 communication chip IC3, external control signal inputForm with DIP switch S 1, the output of Control chip is connected to magnetic protective relay, Control chip IC 2Input is connected to the IO mouth of the main control chip U4 of main control chip circuit, and the data input pin of RS485 communication chip IC3 is connected toThe UART mouth of the main control chip U4 of main control chip circuit, external signal input is connected to
The IO mouth of the main control chip U4 of main control chip circuit, the output of DIP switch S 1 is connected to the IO mouth of main control chip U4;
Described indicator light circuit is made up of 5 road indicator lamps and corresponding triode resistance, and the control input end of indicator lamp connectsTo the IO mouth of main control chip U4;
Described sample circuit is by the sample circuit that leaks electricity, current sampling circuit and synchronous signal acquisition the electric circuit constitute, and electric leakage is sampledThe output of the amplifier IC4 of circuit is connected to the AD3 mouth of main control chip U4, and 3 road current sampling circuit outputs are connected respectively to master controlAD0, the AD1 of chip U4, AD2 mouth, the output of synchronous signal acquisition circuit is connected to the IO mouth of main control chip U4;
Described main control chip main circuit will be by main control chip MC9S08AC60, crystal oscillator and programming the electric circuit constitute, main control chipThe crystal oscillator input pin of MC9S08AC60 is connected to crystal oscillator JZ, and the AD mouth of main control chip MC9S08AC60 is connected to adopting of sample circuitSample output pin, the IO mouth of main control chip MC9S08AC60 is connected to the input control pin of indicator light circuit, main control chipThe input pin of the IO port communications of MC9S08AC60 and the Control chip of control circuit, main control chip MC9S08AC60'sUART mouth is connected to the input pin of the RS485 chip in communication and control circuit, the IO mouth double hit of main control chip MC9S08AC60To communication and control circuit peripheral signal input part, the IO mouth l of main control chip MC9S08AC60 is connected to communication and controls electricityThe output of the DIP switch S 1 in road.
The invention has the beneficial effects as follows the ammeter special purpose relay adopting with leakage function, coordinate intelligent electric meter management, controlPower load output processed, round Realization arrearage tripping operation, the automatic control and the online measuring ability of duty that continue to pay dues and close a floodgate, also canThe faults such as ground connection to circuit or consumer, electric leakage, overcurrent, overvoltage/undervoltage shield.
Adopt this relay load condition and electric leakage situation of supervisory user in real time, once exceed, automatically cut off, protectBarrier user's safety, if need to restore electricity simultaneously, the manual divide-shut brake of needn't being in the action, remote controlled divide-shut brake, economizesTime, to economize labor, safety, efficiency high.
Now, at the on-load switch existing on the market, except function is very single, only has passive divide-shut brake function, not toolHave earth leakage protective and RS485 communication function, some functions increase to some extent, but bulky, can not put into existing ammeter boxIn. And this relay volume is little, function is complete, can be arranged on easily in existing ammeter box, needn't transform existing ammeterCase.
Brief description of the drawings
Fig. 1 is circuit block diagram of the present invention.
Fig. 2 is electrical schematic diagram of the present invention.
Fig. 3 is this relay construction signal (decomposition) figure.
Detailed description of the invention
The present invention is described in detail below in conjunction with embodiment and with reference to accompanying drawing:
Referring to Fig. 3, demonstrate each parts of this relay and the configuration state of shell, this ammeter with creepage protection function is specialRelay, comprises shell and electrical installation, and shell is divided into top cover 8 and base 25 two parts, and interior space is between the two installation room,Pressing close to top cover inner roof wall, substrate 14 is installed is circuit circuit board, has indicator lamp 15, button 16, gear 17, ammeter on substrateThe tactile part 13 of mouth; There are indicator lamp installing hole 9, button installing hole 10, gear installing hole 11 and ammeter interface 6 in the corresponding position of top cover, topCover and also have switch installing hole, inlet wire post and outlet column installing hole 7; Inlet wire post and outlet column 24 are installed in the base of shell,Three magnetic latching relays 22, power transformer 23, three current transformers 19 and ZCTs 21.
Fig. 1 has provided circuit block diagram of the present invention and annexation thereof, and power circuit 2 is responsible for it
The power supply of his each circuit is supplied with, and main control chip circuit is responsible for the control of other circuit, and communication and control circuit are responsible for establishingStandby and the external world contact and the control of external circuit, sample circuit is responsible for the collection of signal, and indicator light circuit is responsible for indicator lampInstruction.
In the communication of Fig. 2 and control circuit 1, be the hardware composition of equipment and external information intercommunication and control relay, logicalLetter and control circuit 1 by Control chip IC 2, RS485 chip IC 3, external signal circuit and DIP switch S 1 form, itBetween components and parts and the annexation of other circuit be: the data input pin of Control chip IC 2 is connected to main control chipThe E2 of the IO mouth of the MC9S08AC14 of circuit 5, E3, the data input pin of RS485 is connected to the UART mouth of MC9S08AC14, R52,On R53 and R54, draw the P1.18-P1.22 in the IO mouth that is connected to LPC1766, the output of the data of RS485 is through R18'sOn draw and the drop-down external interface that is connected to of R18, external signal output is arrived through drawing with capacitor C 12 grounding connections in resistance R 2The C3 of the IO mouth of MC9S08AC14, the output of DIP switch S 1 is through resistance R 30, and R31, draws and is connected on R32 and R33The E4 of the IO mouth of MC9S08AC14, E5, E6 and E7, in addition one end receive GND.
In Fig. 2 power circuit 2, single-phase alternating current LA, LN carries out step-down through transformer T1 and becomes interchange 12V, then passes throughTVS manages D1, is connected to the output of the optocoupler IC5 of sample circuit 4, is connected to bridge heap BRG1 simultaneously, the output of bridge heap BRG1End direct current 12V is connected to the power supply input pin of communication and control circuit IC2, direct current 12V capacitor C 1 after filtering simultaneously, and C2, C3,C5 is connected to the input of regulator block U1, and the output of regulator block U1 is capacitor C 6 after filtering, and C7 is connected to communication and controls electricityRoad 1, indicator light circuit 3, sample circuit 4 and main control chip circuit 5.
The indicator light circuit 3 of Fig. 2 is the hardware compositions for indicating fault, indicator light circuit 3
By the identical the electric circuit constitute in 5 tunnels, 5V power supply passes through respectively resistance R 9, R10, and R11, R6 and R245 are connected to LED2, LED3,LED4, the anode of LED5 and LED6, negative terminal is connected respectively to triode QP2, QP3, QP4, the colelctor electrode of QP5 and QP6, triodeEmitter stage link together GND, the base stage of triode is linked control input end R8, R13, R12, R25 and R26,5 road indicator lampsControl input end R8, R13, R12, R25 and R26 are connected to A1, A0, G2, G1 and the G0 of the IO mouth of main control chip circuit 5.
The main collection of being responsible for sampled signal of sample circuit 4 of Fig. 2, mainly by electric leakage Acquisition Circuit, current collection circuitWith synchronous signal acquisition the electric circuit constitute, the primary signal process resistance R 20 of electric leakage Acquisition Circuit, then pass through diode D3, D4, thenProcess resistance R 21 and R27 enter the input of amplifier IC4, after amplifier IC4 amplifies, are connected to through resistance R 23The AD3 of the AD mouth of MC9S08AC14, electric current primary signal is passed through respectively sample resistance R15, R16 and be connected to MC9S08AC14'sThe AD0 of AD mouth, AD1 and AD2, exchange 12V through resistance R 5 in synchronous signal acquisition circuit, diode D2, resistance R 4, C11 connectsReceive the base stage of triode QP1, the emitter stage of triode QP1 is connected to the IO mouth F5 of MC9S08AC14 through resistance R 3.
In the main control chip circuit 5 of Fig. 2, main control chip is the brain of the Based Intelligent Control of whole equipment, determines whole equipmentCan be according to user's the intelligent operation that requires. Therefore the selection of main control chip is extremely important. This equipment adopts leading micro-The MC9S08AC14 of Freescale company of processor manufacturing company, the MC9S08AC60 Series MCU that Freescale company releases isThe member of high-performance HCS08 series 8-bit microprocessor unit. This serial single-chip microcomputer by 8 of pair of pins compatibility and32 device compositions are the 3rd series of products of Flexis family device. Flexis Series Controller is Freescale controllerThe tie point of association, makes 8 to become a reality with 32 compatibility. MC9S08AC60 series HCS08 microprocessor for the treatment ofRequire highly integrated and Embedded Application low-power consumption. The operating frequency of MC9S08AC60 Series of MCU can reach 40MHz.The peripheral component of MC9S08AC60 Series of MCU comprises up to the flash memory of 60KB, the data storage of 2KBDevice, two UART, SPI interface, two IIC interfaces, 10 ADC, Electric Machine Control PWM of 16 passages, three general timingsThe general PWM of device, 8 outputs and nearly the universal I/O pin of 54. The annexation of MC9S08AC14 and crystal oscillator is:The crystal oscillator input pin XTAL of MC9S08AC14 connects crystal oscillator, and program burn writing circuit is arrived in the BKGD of MC9S08AC14 and the double hit of RST pin,The annexation of main control chip circuit 5 and other circuit is: the AD mouth AD0 of MC9S08AC14, and AD1, AD2 is connected respectively to samplingThe R15 of the current sampling circuit in circuit 4, R16 and R17, the AD mouth AD3 of MC9S08AC14 is connected to the leakage in sample circuit 4The R23 of electricity sample circuit, the F5 of the IO mouth of MC9S08AC14 is connected to the R3 of the synchronizing signal sample circuit of sample circuit 4,The A0 of the IO mouth of MC9S08AC14, A1, G0, G1, G2 is connected respectively to the R13 of indicator light circuit 3, R8, R26, R25 and R12,The E2 of the IO mouth of MC9S08AC14, E3 is connected respectively to the control input end of the IC2 of communication and control circuit 1, MC9S08AC14UART mouth be connected to the data input pin of communication and the RS485 of control circuit 1, the C2 of the IO mouth of MC9S08AC14 is connected to logicalThe C12 of the outer signal output of letter and control circuit 1, the E4 of the IO mouth of MC9S08AC14, E5, E6, E7 is connected respectively to logicalOutput R30, R31, R32 and the R33 of the DIP switch S 1 of letter and control circuit 1.
In the present embodiment, select the model of electronic devices and components as follows:
One, resistance class device: R11M, R210K, R1510, R1610, R1710, R20100, R23100, R7510, R8510，R12510，R13510，R25510，R61K，R91K，R111K，R291K，R361K，R144.7K，R484.7K，R510K，R310K，R1810K，R1910K，R2110K，R3010K，R3110K，R3210K，R3310K，R3410K，R3510K，R3710K，R415K，R22100K，
Two, capacitance kind device: C, 824PF, C924PF, C154.7u, C5104, C7104, C10104, C11104, C12104，C13104，C14104，C15104，C17104，C610u
Three, triode class device: QP19013, QP29013, QP39013, QP49013, QP59013, QP69013
Four, diode-like device: D1SMBJ18CA, D2IN4148, D3IN4148, D14IN4148, LED1 green emittingDiode, LED2 red light emitting diodes, LED3 red light emitting diodes, LED4 red light emitting diodes, LED5 rednessLight emitting diode, LED6 red light emitting diodes,
Five, integrated components and parts: U178L05, IC1MC9S08AC16-44, IC2BL8023C, IC3SN75176, IC4LM258，
Six, other: T1 AC transformer, BRG1DBS107, JZ crystal oscillator 4M, S1 DIP switch
The invention provides a kind of ammeter special purpose relay with creepage protection function, both solved load control problem, have againCreepage protection function; Also can input or RS485 communication realizes Long-distance Control load relay divide-shut brake by external signal.
This ammeter special purpose relay with creepage protection function, its electrical installation comprises power circuit 2, main control chip circuit5, communication and control circuit 1, indicator light circuit 3 and sample circuit 4, the annexation of each circuit is: power circuit 2 single phase acs220V input is through transformer pressure-reducing, then bridge heap carries out rectification and become direct current, exports 5V by regulator block, is main control chip circuit5, communication and control circuit 1, indicator light circuit 3 and sample circuit 4 provide stable 5V power supply and 12V power supply; In power circuit 2The output of interchange 12V be connected to the optocoupler output of sample circuit 4;
Main control chip circuit 5 connects the data input pin of the middle RS485 chip of communication and control circuit 1, connects communication and controlsThe data input pin of circuit 1 Control chip, the output of connection communication and control circuit 1 external control, connects communicationOutput with control circuit 1 DIP switch;
Main control chip circuit 5 connects indicator light circuit 3 input control ends;
Main control chip circuit 5 connects the output of the electric leakage sampling of sample circuit 4, connects the three-phase current sampling of sample circuit 4Output, connect the output of the electric leakage sampling of sample circuit (4), connect the output of the synchronization signal detection of sample circuit 4End;
In power circuit 2, single-phase alternating current LA, LN is depressured to and exchanges 12V through transformer T1 respectively, and interchange 12V is connected to and adoptsThe output of the optocoupler IC5 of sample circuit 4 exchanges 12V after TVS pipe D1 protects simultaneously, then carries out through the heap BRG1 that passes a bridgeRectification becomes direct current 12V, and direct current 12V is connected to the power end of the Control chip IC 2 of communication and control circuit 1, simultaneouslyDirect current 12V capacitor C 1 after filtering again, C2, C3, C5 is connected to regulator block U1 input, and regulator block U1 output direct current 5V is after filtrationRipple capacitor C 6, C7 is connected to indicator light circuit 3, communication and control circuit 1, sample circuit 4 and main control chip circuit 5;
Communication and control circuit 1 be by Control chip IC 2, RS485 communication chip IC3, external control signal input and groupBit switch S1 composition, the output of Control chip is connected to magnetic protective relay, the input of Control chip IC 2End is connected to the IO mouth of the main control chip U4 of main control chip circuit 5, and the data input pin of RS485 communication chip IC3 is connected to masterThe UART mouth of the main control chip U4 of control chip circuit 5, external signal input is connected to the main control chip U4 of main control chip circuit 5IO mouth, the output of DIP switch S 1 is connected to the IO mouth of main control chip U4;
Indicator light circuit 3 is made up of 5 road indicator lamps and corresponding triode resistance, and the control input end of indicator lamp is connected to master controlThe IO mouth of chip U4;
Sample circuit 4 is by electric leakage sample circuit, current sampling circuit and synchronous signal acquisition the electric circuit constitute, electric leakage sample circuitThe output of amplifier IC4 is connected to the AD3 mouth of main control chip U4, and 3 road current sampling circuit outputs are connected respectively to main control chip U4AD0, AD1, AD2 mouth, the output of synchronous signal acquisition circuit is connected to the IO mouth of main control chip U4;
Described main control chip circuit 5 is mainly by main control chip MC9S08AC60, crystal oscillator and programming the electric circuit constitute, main control chipThe crystal oscillator input pin of MC9S08AC60 is connected to crystal oscillator JZ, and the AD mouth of main control chip MC9S08AC60 is connected to sample circuit 4Sampling output pin, the IO mouth of main control chip MC9S08AC60 is connected to the input control pin of indicator light circuit 3, main control chipThe input pin of the IO port communications of MC9S08AC60 and the Control chip of control circuit 1, main control chip MC9S08AC60'sUART mouth is connected to the input pin of the RS485 chip in communication and control circuit 1, the IO mouth double hit of main control chip MC9S08AC60To communication and control circuit 1 peripheral signal input part, the IO mouth l of main control chip MC9S08AC60 is connected to communication and controls electricityThe output of the DIP switch S 1 in road 1.
The main control chip of this equipment, according to the sampled value of sample circuit, carries out AD conversion and calculates, Real-Time Monitoring three-phase loadAnd electric leakage, once customer charge exceeds or leaks electricity to exceed, scope or the order of long-range output separating brake, main control chip electricity are set in advanceSeparating brake is controlled on road at once, controls and earth leakage protective function thereby reach load.
The telecommunication circuit of this equipment comprises local wired RS485 circuit and external normally-closed contact, local wired employingIndustrial RS485 technology, antijamming capability is strong, communication distance far away (can reach 3000 meters), accessible existing native industry officeTerritory net, external normally-closed contact, can control divide-shut brake according to this contact signal simultaneously.
Claims (5)
1. the ammeter special purpose relay with creepage protection function, comprises shell and electrical installation, shell be divided into top cover (8) andBase (25) two parts, interior space is between the two installation room, pressing close to top cover inner roof wall, substrate (14) is installed is that circuit is integratedPlate, is characterized in that having indicator lamp (15), button (16), gear (17), ammeter interface to touch part (13), the corresponding position of top cover on substrateThere are indicator lamp installing hole (9), button installing hole (10), gear installing hole (11) and ammeter interface (6), on top cover, also have switch peaceDress hole, inlet wire post and outlet column installing hole (7), be provided with inlet wire post and outlet column (24) in the base of shell, three magnetic keepRelay (22), power transformer (23), three current transformers (19) and a ZCT (21); Electrical installation comprisesPower circuit (2), main control chip circuit (5), communication and control circuit (1), indicator light circuit (3), sample circuit (4); Power supplyCircuit (2) single phase ac 220V input is through transformer pressure-reducing, then bridge heap carries out rectification and become direct current, exports by regulator block5V, for main control chip circuit (5), communication and control circuit (1), indicator light circuit (3) and sample circuit (4) provide stable 5VPower supply and 12V power supply; The output of interchange 12V in power circuit (2) is connected to the optocoupler output of sample circuit (4);
Main control chip circuit (5) connects the data input pin of communication and the middle RS485 chip of control circuit (1), connect communication withThe data input pin of control circuit (1) Control chip, the output of connection communication and control circuit (1) external control,Connect the output of communication and control circuit (1) DIP switch;
Main control chip circuit (5) connects indicator light circuit (3) input control end;
Main control chip circuit (5) connects the output of the electric leakage sampling of sample circuit (4), connects the three-phase electricity of sample circuit (4)The output of stream sampling, the output of the electric leakage sampling of connection sample circuit (4), connects the synchronizing signal inspection of sample circuit (4)The output of surveying.
2. the ammeter special purpose relay with creepage protection function as claimed in claim 1, is characterized in that described base (25)Outer bottom be provided with location card article (20).
3. the ammeter special purpose relay with creepage protection function as claimed in claim 1, is characterized in that in described installation roomPower circuit circuit board (18) is also installed.
4. the ammeter special purpose relay with creepage protection function as claimed in claim 1, outside the shell described in it is characterized in thatShape is of a size of wide 7-12 ㎝, the long 11-17 ㎝ of base, overall high 6-10 ㎝.
5. the ammeter special purpose relay with creepage protection function as claimed in claim 1, is characterized in that described power circuit(2) in, single-phase alternating current LA, LN is depressured to and exchanges 12V through transformer T1 respectively, exchanges 12V and is connected to sample circuit (4)The output of optocoupler IC5 exchanges 12V after TVS pipe D1 protects simultaneously, then carries out rectification through the heap BRG1 that passes a bridge and become directlyStream 12V, direct current 12V is connected to the power end of the Control chip IC 2 of communication and control circuit (1), and direct current 12V is more simultaneouslyCapacitor C 1 after filtering, C2, C3, C5 is connected to regulator block U1 input, regulator block U1 output direct current 5V capacitor C 6 after filtering,C7 is connected to indicator light circuit (3), communication and control circuit (1), sample circuit (4) and main control chip circuit (5);
Described communication and control circuit (1) be by Control chip IC 2, RS485 communication chip IC3, external control signalInput and DIP switch S 1 form, and the output of Control chip is connected to magnetic protective relay, Control chipThe input of IC2 is connected to the IO mouth of the main control chip U4 of main control chip circuit (5), the data input of RS485 communication chip IC3End is connected to the UART mouth of the main control chip U4 of main control chip circuit (5), and external signal input is connected to main control chip circuit(5) the IO mouth of main control chip U4, the output of DIP switch S 1 is connected to the IO mouth of main control chip U4;
Described indicator light circuit (3) is made up of 5 road indicator lamps and corresponding triode resistance, and the control input end of indicator lamp connectsReceive the IO mouth of main control chip U4;
Described sample circuit (4) is by electric leakage sample circuit, current sampling circuit and synchronous signal acquisition the electric circuit constitute, and electric leakage is adoptedThe output of the amplifier IC4 of sample circuit is connected to the AD3 mouth of main control chip U4, and 3 road current sampling circuit outputs are connected respectively to masterAD0, AD1, the AD2 mouth of control chip U4, the output of synchronous signal acquisition circuit is connected to the IO mouth of main control chip U4;
Described main control chip circuit (5) is mainly by main control chip MC9S08AC60, crystal oscillator and programming the electric circuit constitute, main control chipThe crystal oscillator input pin of MC9S08AC60 is connected to crystal oscillator JZ, and the AD mouth of main control chip MC9S08AC60 is connected to sample circuit (4)Sampling output pin, the IO mouth of main control chip MC9S08AC60 is connected to the input control pin of indicator light circuit (3), main control chipThe input pin of the Control chip of the IO port communications of MC9S08AC60 and control circuit (1), main control chip MC9S08AC60UART mouth be connected to the input pin of RS485 chip in communication and control circuit (1), the IO mouth of main control chip MC9S08AC60Double hit to communication and control circuit (1) peripheral signal input part, the IO mouth l of main control chip MC9S08AC60 be connected to communication withThe output of the DIP switch S 1 in control circuit (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136506.4A CN105610123A (en) | 2016-03-10 | 2016-03-10 | Ammeter used relay having electric leakage protection function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610136506.4A CN105610123A (en) | 2016-03-10 | 2016-03-10 | Ammeter used relay having electric leakage protection function |
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| Publication Number | Publication Date |
|---|---|
| CN105610123A true CN105610123A (en) | 2016-05-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610136506.4A Pending CN105610123A (en) | 2016-03-10 | 2016-03-10 | Ammeter used relay having electric leakage protection function |
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| Country | Link |
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| CN (1) | CN105610123A (en) |
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