CN205846696U - Ammeter special purpose relay with creepage protection function - Google Patents

Abstract

A kind of ammeter special purpose relay of band creepage protection function; including shell and electrical installation; shell is divided into top cover (8) and base (25) two parts; space between the two is installation room; indoor top has the circuit board making installation base plate (14); display lamp (15), button (16), gear (17) and ammeter interface contact element (13) are installed; there is the installing hole of the elements such as display lamp on the relevant position of top cover, turnover terminal (24), magnetic latching relay (22), current transformer (19), ZCT (21) etc. are installed in base；Electrical installation includes power circuit (2), main control chip circuit (5), communication and control circuit (1), indicator light circuit (3) and sample circuit (4)；This relay is arranged on three-phase and four-line low-voltage circuit, power consumer can be carried out automatic Load control and earth leakage protective, moreover it is possible to Remote Control Automatic combined floodgate.This relay volume I is installed in ammeter box generally used now, saves time, saves labor, safe efficient.

Description

Ammeter special purpose relay with creepage protection function

Technical field

This utility model relate to a kind of coordinate intelligent electric meter realize earth leakage protective, remote control close a floodgate and expense control function external Ammeter special purpose relay.

Background technology

Developing rapidly recently as Chinese national economy, has emerged large quantities of middle-size and small-size enterprises to be processed as master Industry；Along with deepening continuously of town planning construction process, the development of real estate cause achieves advances by leaps and bounds, and successively occurs in that big The slightest all types of residential quarters；Good employment environment actively promotes that Living consumption improves constantly.And it is all above These all be unable to do without this overall situation of electricity consumption, and thus all trades and professions are more and more higher, to confession to the requirement of power supply quality, power supply quantity The dependency of electricity is more and more stronger.Meanwhile, electricity consumption dispute, toll administration problem layer are supplied due to a series of of power supply management initiation Go out the poorest.Therefore, continue to improve the line end management of power use, introduce first and then practical low-voltage variation equipment is current primary Task, is also rationally to solve the shortcut for the harmonious power utilization environment of electricity consumption dispute and establishment.

Intelligent electric meter, for realizing taking control function, has been specifically designed built-in load control switch, is used for controlling and cutting off use Electricity end major loop.Although having simple in construction, cost-effective advantage, but owing to this kind of built-in on-load switch is the most limited In ammeter compact structure size own, the actuator that make-break capacity is relatively low can only be used, when cut-offfing larger current load, Easily damage intelligent electric meter itself.Now need to change whole ammeter, cause the consumption of a large amount of human and material resources.

The most existing prepayment breaker, owing to wiring, networking are the most complicated loaded down with trivial details, when subscriber arrearage trips Or after line fault tripping operation, be required for manual site's hand-reset combined floodgate and can continue power supply, make the reality of being aligned electrician undoubtedly Border workload is greatly increased, and therefore its practicality is the highest.

Continue, 2010 the twice scale upgrading of rural power grids in 1998, and China's rural low voltage network assumes an entirely new aspect.For continuing Advance and deeply carry out the improvement project of rural power grids, especially strengthen the Perfect the work to line end protection, the third time of China Upgrading of rural power grids upgrading engineering is immediately.National Development and Reform Commission issues and " implements new round rural area electricity about " 13 " period The notice of net transformation and upgrade engineering suggestion " in be distinctly claimed, to the year two thousand twenty, rural area, the whole nation realizes reliable and stable confession substantially Electricity services all standing, and power supply capacity and service level are obviously improved, and rural power grids power supply reliability reaches 99.8%, integrated voltage Qualification rate reaches 97.9%, and capacity of distribution transform is not less than 2 kilovolt-amperes per family, and built structures are reasonable, advanced technology, safe and reliable, intelligence Energy efficient modern countryside electrical network, electric energy proportion in household energy consumption structure in the countryside is greatly improved.

Along with China upgrading of rural power grids work constantly advance with deeply, for meeting economic development, being actually needed of resident living, Thoroughly solve present in current line end electric power system problem in the urgent need to.Therefore, social development is currently being promoted With under the overall situation of upgrade of rural power grids, start the special purpose relay that research is implemented to coordinate with intelligent electric meter in good time, be to comply with to work as Front electric network reconstruction development situation, be the most necessary.This will bring huge Social benefit and economic benefit, contribute to into One-step optimization electric network composition, actively improves actual power quality, General Promotion electric service level.Through retrieval and market survey, Not yet it is found to have spatial load forecasting matching used with intelligent electric meter, the relay closed a floodgate with creepage protection function and Remote Document announcement and material object appear on the market.

Utility model content

The technical problems to be solved in the utility model is to provide the ammeter special purpose relay of a kind of band creepage protection function.Should Relay coordinates with intelligent watt-hour meter, utilizes the break-make of ammeter output electric shock signal, common realization to take control function, control electricity consumption End actual electricity consumption situation.Be primarily adapted for use in exchange 50/60Hz, rated operational voltage 220V/380V and following, rated current≤ The three-phase and four-line low-voltage circuit of 125A, by the detection to ammeter output control signal, is used for coordinating ammeter management, controlling electricity consumption Load export, realize comprehensively arrearage tripping operation, continue to pay dues close a floodgate automatically control and duty on-line checking function, it is possible to circuit Or the fault such as the ground connection of electrical equipment, electric leakage, overcurrent, overvoltage/undervoltage shields.

Solve above-mentioned technical problem and adopt the following technical scheme that the ammeter special purpose relay of this band creepage protection function, bag Including shell and electrical installation, shell is divided into top cover and base two parts, and interior space between the two is installation room, presses close to top in top cover Wall is provided with substrate i.e. circuit circuit board, and substrate has display lamp, button, gear, ammeter interface contact element, and the corresponding position of top cover has Display lamp installing hole, button installing hole, gear installing hole and ammeter interface, top cover also switchs installing hole, inlet wire post and goes out Terminal installing hole, is provided with inlet wire post and outlet column in the base of shell, three magnetic latching relays, mains transformer, three Current transformer and a ZCT；Electrical installation includes power circuit, main control chip circuit, communication and control circuit, Indicator light circuit, sample circuit；Power circuit single phase ac 220V inputs through transformer pressure-reducing, then bridge heap carries out rectification and becomes Direct current, exports 5V by regulator block, provides for main control chip circuit, communication and control circuit, indicator light circuit and sample circuit Stable 5V power supply and 12V power supply；The outfan of the exchange 12V in power circuit is connected to the optocoupler outfan 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 control The data input pin of circuit relay control chip processed, connects the outfan of communication and control circuit external control, connects communication Outfan with control circuit DIP switch；

Main control chip circuit connects indicator light circuit input and controls end；

Main control chip circuit connects the outfan of the electric leakage sampling of sample circuit, connects the three-phase current sampling of sample circuit Outfan, connect the outfan of the electric leakage sampling of sample circuit, connect the outfan of synchronization signal detection of sample circuit.

The outer bottom of described base is provided with location card article.

Power circuit circuit board it is also equipped with in described installation room.

The overall dimensions 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 are depressured to exchange 12V respectively through transformator T1, exchange 12V Being connected to the outfan of the optocoupler IC5 of sample circuit, exchange 12V is after TVS pipe D1 is protected simultaneously, then through gap bridge heap BRG1 carries out rectification and becomes the power supply that direct current 12V, direct current 12V are connected to the Control chip IC 2 of communication and control circuit Holding, direct current 12V electric capacity C1 the most after filtering simultaneously, C2, C3, C5 are connected to regulator block U1 input, and regulator block U1 exports direct current 5V electric capacity C6 after filtering, C7 are connected to indicator light circuit, communication and control circuit, sample circuit and main control chip circuit；

Described communication and control circuit are by Control chip IC 2, RS485 communication chip IC3, external control signal Input and DIP switch S1 composition, the outfan of Control chip is connected to magnetic protective relay, Control chip The input of IC2 is connected to the I/O port of the main control chip U4 of main control chip circuit, the data input pin of RS485 communication chip IC3 Being connected to the UART mouth of the main control chip U4 of main control chip circuit, external signal input terminals is connected to the master control of main control chip circuit The I/O port of chip U4, the outfan of DIP switch S1 is connected to the I/O port of main control chip U4；

Described indicator light circuit is made up of 5 road display lamps and corresponding audion resistance, the control input of display lamp It is connected to the I/O port of main control chip U4；

Described sample circuit is made up of the sample circuit that leaks electricity, current sampling circuit and synchronous signal acquisition circuit, electric leakage The output of 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 AD0, AD1, AD2 mouth of main control chip U4, the output of synchronous signal acquisition circuit is connected to the I/O port of main control chip U4；

Described main control chip main circuit to be made up of main control chip MC9S08AC60, crystal oscillator and programming circuit, master control core The crystal oscillator input pin of sheet MC9S08AC60 is connected to the AD mouth of crystal oscillator JZ, main control chip MC9S08AC60 and is connected to sample circuit Sampling output pin, the I/O port of main control chip MC9S08AC60 is connected to the input of indicator light circuit and controls foot, main control chip The I/O port communication of MC9S08AC60 and the input pin of the Control chip of control circuit, main control chip MC9S08AC60's UART mouth is connected to the input pin of the RS485 chip in communication and control circuit, the I/O port double hit of main control chip MC9S08AC60 To communication and control circuit peripheral signal input part, the I/O port l of main control chip MC9S08AC60 is connected to communication and controls electricity The outfan of the DIP switch S1 in road.

The beneficial effects of the utility model are to use the ammeter special purpose relay of band leakage function, coordinate intelligent electric meter pipe Reason, control power load output, realize comprehensively arrearage tripping operation, continue to pay dues close a floodgate automatically control and duty on-line checking merit Can, it is possible to the faults such as circuit or the ground connection of electrical equipment, electric leakage, overcurrent, overvoltage/undervoltage are shielded.

Use this relay can monitor load condition and the electric leakage situation of user in real time, once exceed, automatically cut off, protect The safety of barrier user, if need to restore electricity simultaneously, it is not necessary to manual divide-shut brake of being in the action, remote controlled divide-shut brake, saves Time, to save labor, safety, efficiency high.

At on-load switch present on market, except function is the most single, the most passive divide-shut brake function, do not have Having earth leakage protective and RS485 communication function, some functions increased, but bulky, it is impossible to puts into existing ammeter box In.And this relay volume is little, function is complete, can be conveniently mounted in existing ammeter box, it is not necessary to transform existing ammeter Case.

Accompanying drawing explanation

Fig. 1 is circuit block diagram of the present utility model.

Fig. 2 is electrical schematic diagram of the present utility model.

Fig. 3 is this relay construction signal (decomposition) figure.

Detailed description of the invention

This utility model below in conjunction with embodiment and is described in detail referring to the drawings:

See Fig. 3, demonstrate each parts and the configuration state of shell of this relay, the ammeter of this band creepage protection function Special purpose relay, including shell and electrical installation, shell is divided into top cover 8 and base 25 two parts, and interior space between the two is peace Dress room, presses close to top cover inner roof wall and is provided with substrate 14 i.e. circuit circuit board, and substrate has display lamp 15, button 16, gear 17, electricity Table interface contact element 13；There are display lamp installing hole 9, button installing hole 10, gear installing hole 11 and ammeter interface in the corresponding position of top cover 6, top cover also switchs installing hole, inlet wire post and outlet column installing hole 7；Inlet wire post and outlet column are installed in the base of shell 24, three magnetic latching relays 22,23, three current transformers 19 of mains transformer and a ZCT 21.

Fig. 1 gives circuit block diagram of the present utility model and annexation thereof, and other each circuit are responsible for by power circuit 2 Power supply supplies, and main control chip circuit is responsible for the control of other circuit, communication and control circuit be responsible for equipment with extraneous contact and The control of external circuit, sample circuit is responsible for the collection of signal, and indicator light circuit is responsible for the instruction of display lamp.

In the communication of Fig. 2 and control circuit 1, it is the hardware composition of equipment and external information intercommunication and control relay, logical Letter and control circuit 1 are made up of Control chip IC 2, RS485 chip IC 3, external signal circuit and DIP switch S1, it Between the annexation of components and parts and other circuit be: the data input pin of Control chip IC 2 is connected to main control chip The E2 of the I/O port of the MC9S08AC14 of circuit 5, the data input pin of E3, RS485 is connected to the UART mouth of MC9S08AC14, R52, The outfan of the data of P1.18 P1.22, RS485 that R53 and R54 pull-up is connected in the I/O port of LPC1766 is through R18's Pull-up and the drop-down external interface that is connected to of R18, external signal output is arrived through resistance R2 pull-up and electric capacity C12 grounding connection The C3 of the I/O port of MC9S08AC14, the outfan of DIP switch S1 is connected to through resistance R30, R31, R32 and R33 pull-up E4, E5, E6 and the E7 of the I/O port of MC9S08AC14, other end also receives GND.

In Fig. 2 power circuit 2, single-phase alternating current LA, LN carry out blood pressure lowering through transformator T1 and become exchange 12V, then pass through TVS pipe D1, is connected to the outfan of the optocoupler IC5 of sample circuit 4, is connected to bridge heap BRG1, the output of bridge heap BRG1 simultaneously End direct current 12V is connected to communicate and the power supply input pin of control circuit IC2, direct current 12V electric capacity C1, C2, C3 after filtering simultaneously, C5 is connected to the input of regulator block U1, and the outfan of regulator block U1 electric capacity C6 after filtering, C7 are connected to communication and control electricity Road 1, indicator light circuit 3, sample circuit 4 and main control chip circuit 5.

The indicator light circuit 3 of Fig. 2 is to form for the hardware of indicating fault, and indicator light circuit 3 is by the identical circuit group in 5 tunnels Becoming, 5V power supply is just being connected to LED2, LED3, LED4, LED5 and LED6 by resistance R9, R10, R11, R6 and R245 respectively End, negative terminal is connected respectively to the colelctor electrode of audion QP2, QP3, QP4, QP5 and QP6, and the emitter stage of audion is linked together GND, the base stage of audion link control input R8, R13, R12, R25 and R26, the control input R8 of 5 road display lamps, R13, R12, R25 and R26 are connected to A1, A0, G2, G1 and the G0 of the I/O port of main control chip circuit 5.

The collection of sampled signal is mainly responsible for by the sample circuit 4 of Fig. 2, mainly by electric leakage Acquisition Circuit, current collection circuit Forming with synchronous signal acquisition circuit, the primary signal of electric leakage Acquisition Circuit is through resistance R20, then through diode D3, D4, then Enter the input of amplifier IC4 through resistance R21 and R27, be connected to through resistance R23 after amplifier IC4 is amplified The AD3 of the AD mouth of MC9S08AC14, electric current primary signal is respectively through sample resistance R15, R16 and is connected to MC9S08AC14's AD0, AD1 and the AD2 of AD mouth, exchanges 12V and connects through resistance R5, diode D2, resistance R4, C11 in synchronous signal acquisition circuit Receiving the base stage of audion QP1, the emitter stage of audion QP1 is connected to the I/O port F5 of MC9S08AC14 through resistance R3.

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 equipment Can be according to the requirement intelligent operation of user.Therefore the selection of main control chip is extremely important.This equipment uses leading micro- The MC9S08AC14 of Freescale company of processor manufacturing company, the MC9S08AC60 Series MCU that Freescale company releases is The member of high-performance HCS08 series 8-bit microprocessor unit.The single-chip microcomputer of this series by pair of pins compatible 8 and 32 device compositions, are the 3rd series of products of Flexis family device.Flexis Series Controller is Freescale controller The junction point of association, makes 8 to become a reality with 32 compatibility.MC9S08AC60 series HCS08 microprocessor is used for processing Require highly integrated and low-power consumption Embedded Application.The operation frequency of MC9S08AC60 Series of MCU is up to 40MHz. The peripheral component of MC9S08AC60 Series of MCU comprises the data storage of the flash memorizer of up to 60KB, 2KB Device, two UART, SPI interfaces, two IIC interfaces, 10 ADC of 16 passages, motors control PWM, three general timings Device, the general PWM of 8 outputs and the general purpose I/O pin of up to 54.The annexation of MC9S08AC14 and crystal oscillator is: The crystal oscillator input pin XTAL of MC9S08AC14 connects crystal oscillator, BKGD and the RST foot double hit of MC9S08AC14 to program burn writing circuit, The annexation of main control chip circuit 5 and other circuit is: the AD mouth AD0 of MC9S08AC14, and AD1, AD2 are connected respectively to sampling The AD mouth AD3 of R15, R16 and the R17 of the current sampling circuit in circuit 4, MC9S08AC14 is connected to the leakage in sample circuit 4 The F5 of the I/O port of the R23, MC9S08AC14 of electricity sample circuit is connected to the R3 of the synchronizing signal sample circuit of sample circuit 4, The A0 of the I/O port of MC9S08AC14, A1, G0, G1, G2 be connected respectively to R13, R8, R26, R25 and the R12 of indicator light circuit 3, The E2 of the I/O port of MC9S08AC14, E3 are connected respectively to the control input of the IC2 of communication and control circuit 1, MC9S08AC14 UART mouth be connected to the data input pin of RS485 of communication and control circuit 1, the C2 of the I/O port of MC9S08AC14 is connected to lead to The E4 of the I/O port of the C12, MC9S08AC14 of the outer signal outfan of letter and control circuit 1, E5, E6, E7 are connected respectively to lead to Outfan R30, R31, R32 and the R33 of the DIP switch S1 of letter and control circuit 1.

The model selecting electronic devices and components in the present embodiment is as follows:

One, resistance class device: R1 1M, R2 10K, R15 10, R16 10, R17 10, R20 100, R23 100, R7 510, R8 510, R12 510, R13 510, R25 510, R6 1K, R9 1K, R11 1K, R29 1K, R36 1K, R14 4.7K, R48 4.7K, R5 10K, R3 10K, R18 10K, R19 10K, R21 10K, R30 10K, R31 10K, R32 10K, R33 10K, R34 10K, R35 10K, R37 10K, R4 15K, R22 100K

Two, capacitance kind device: C, 8 24PF, C9 24PF, C15 4.7u, C5 104, C7 104, C10 104, C11 104, C12 104, C13 104, C14 104, C15 104, C17 104, C6 10u

Three, audion class device: QP1 9013, QP2 9013, QP3 9013, QP4 9013, QP5 9013, QP6 9013

Four, diode-like device: D1 SMBJ18CA, D2 IN4148, D3 IN4148, D14 IN4148, LED1 are green Light emitting diode, LED2 red light emitting diodes, LED3 red light emitting diodes, LED4 red light emitting diodes, LED5 Red light emitting diodes, LED6 red light emitting diodes,

Five, integrated components and parts: U1 78L05, IC1 MC9S08AC16-44, IC2 BL8023C, IC3 SN75176, IC4 LM258,

Six, other: T1 AC transformer, BRG1 DBS107, JZ crystal oscillator 4M, S1 DIP switch

This utility model provides the ammeter special purpose relay of a kind of band creepage protection function, had both solved spatial load forecasting and has asked Topic, has again creepage protection function；Realize remotely controlling load relay also by external signal input or RS485 communication Divide-shut brake.

The ammeter special purpose relay of this band creepage protection function, its electrical installation includes power circuit 2, main control chip circuit 5, communication and control circuit 1, indicator light circuit 3 and sample circuit 4, the annexation of each circuit is: power circuit 2 single phase ac 220V inputs through transformer pressure-reducing, then bridge heap carries out rectification and becomes direct current, exports 5V by regulator block, for main control chip circuit 5, 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 2 The outfan of exchange 12V be connected to the optocoupler outfan of sample circuit 4；

Main control chip circuit 5 connects the data input pin of middle RS485 chip of communication and control circuit 1, connect communication and The data input pin of control circuit 1 Control chip, connects the outfan of communication and control circuit 1 external control, connects Communication and the outfan of control circuit 1 DIP switch；

Main control chip circuit 5 connects indicator light circuit 3 input and controls end；

Main control chip circuit 5 connects the outfan of the electric leakage sampling of sample circuit 4, connects the three-phase current of sample circuit 4 The outfan of sampling, connects the outfan of the electric leakage sampling of sample circuit (4), connects the synchronization signal detection of sample circuit 4 Outfan；

In power circuit 2, single-phase alternating current LA, LN are depressured to exchange 12V, exchange 12V respectively through transformator T1 and connect To the outfan of the optocoupler IC5 of sample circuit 4, exchange 12V is after TVS pipe D1 is protected simultaneously, then through gap bridge heap BRG1 Carry out rectification and become the power end that direct current 12V, direct current 12V are connected to the Control chip IC 2 of communication and control circuit 1, Direct current 12V electric capacity C1 the most after filtering simultaneously, C2, C3, C5 be connected to regulator block U1 input, and regulator block U1 exports direct current 5V warp Crossing filter capacitor C6, 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 are inputted by Control chip IC 2, RS485 communication chip IC3, external control signal With DIP switch S1 composition, the outfan of Control chip is connected to magnetic protective relay, Control chip IC 2 Input is connected to the I/O port of the main control chip U4 of main control chip circuit 5, and the data input pin of RS485 communication chip IC3 connects To the UART mouth of the main control chip U4 of main control chip circuit 5, external signal input terminals is connected to the master control core of main control chip circuit 5 The I/O port of sheet U4, the outfan of DIP switch S1 is connected to the I/O port of main control chip U4；

Indicator light circuit 3 is made up of 5 road display lamps and corresponding audion resistance, and the control input of display lamp is connected to The I/O port of main control chip U4；

Sample circuit 4 is made up of electric leakage sample circuit, current sampling circuit and synchronous signal acquisition circuit, electric leakage sampling electricity The output of amplifier IC4 on road is connected to the AD3 mouth of main control chip U4, and 3 road current sampling circuit outputs are connected respectively to master control core AD0, AD1, AD2 mouth of sheet U4, the output of synchronous signal acquisition circuit is connected to the I/O port of main control chip U4；

Described main control chip circuit 5 is mainly made up of main control chip MC9S08AC60, crystal oscillator and programming circuit, master control core The crystal oscillator input pin of sheet MC9S08AC60 is connected to the AD mouth of crystal oscillator JZ, main control chip MC9S08AC60 and is connected to sample circuit 4 Sampling output pin, the I/O port of main control chip MC9S08AC60 be connected to indicator light circuit 3 input control foot, main control chip The I/O port communication of MC9S08AC60 and the input pin of the Control chip of control circuit 1, main control chip MC9S08AC60's UART mouth is connected to the input pin of the RS485 chip in communication and control circuit 1, the I/O port double hit of main control chip MC9S08AC60 To communication and control circuit 1 peripheral signal input part, the I/O port l of main control chip MC9S08AC60 is connected to communication and controls electricity The outfan of the DIP switch S1 in road 1.

The main control chip of this equipment, according to the sampled value of sample circuit, is AD converted calculating, monitors three-phase load in real time And electric leakage, once customer charge exceeds or electric leakage is beyond arranging scope or remotely output separating brake order in advance, and main control chip is electric Road controls separating brake at once, thus reaches spatial load forecasting and earth leakage protective function.

The telecommunication circuit of this equipment includes local wired RS485 circuit and external normally-closed contact, local wired employing Industrial RS485 technology, capacity of resisting disturbance is strong, and communication distance is remote (up to 3000 meters), accessible existing native industry office Territory net, the most external normally-closed contact, divide-shut brake can be controlled according to this contact signal.

Claims (5)

1. an ammeter special purpose relay for band creepage protection function, including shell and electrical installation, shell be divided into top cover (8) and Base (25) two parts, interior space between the two is installation room, and pressing close to top cover inner roof wall, to be provided with substrate (14) i.e. circuit integrated Plate, is characterized in that having display lamp (15), button (16), gear (17), ammeter interface contact element (13), the corresponding position of top cover on substrate There are display lamp installing hole (9), button installing hole (10), gear installing hole (11) and ammeter interface (6), top cover also switchs peace Dress 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 keep Relay (22), mains transformer (23), three current transformers (19) and a ZCT (21)；Electrical installation includes Power circuit (2), main control chip circuit (5), communication and control circuit (1), indicator light circuit (3), sample circuit (4)；Power supply Circuit (2) single phase ac 220V inputs through transformer pressure-reducing, then bridge heap carries out rectification and becomes direct current, is exported by regulator block 5V, provides stable 5V for main control chip circuit (5), communication and control circuit (1), indicator light circuit (3) and sample circuit (4) Power supply and 12V power supply；The outfan of the exchange 12V in power circuit (2) is connected to the optocoupler outfan of sample circuit (4)；

Main control chip circuit (5) connects the data input pin of middle RS485 chip of communication and control circuit (1), connect communication and The data input pin of control circuit (1) Control chip, connects the outfan of communication and control circuit (1) external control, Connect communication and the outfan of control circuit (1) DIP switch；

Main control chip circuit (5) connects indicator light circuit (3) input and controls end；

Main control chip circuit (5) connects the outfan of the electric leakage sampling of sample circuit (4), connects the three-phase electricity of sample circuit (4) The outfan of stream sampling, connects the outfan of the electric leakage sampling of sample circuit (4), connects the synchronizing signal inspection of sample circuit (4) The outfan surveyed.

2. the ammeter special purpose relay of band 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 of band creepage protection function as claimed in claim 1, in is characterized in that described installation room It is also equipped with power circuit circuit board (18).

4. the ammeter special purpose relay of band creepage protection function as claimed in claim 1, is characterized in that outside described shell The widest 7-12 of shape, the long 11-17 of base, overall high 6-10.

5. the ammeter special purpose relay of band creepage protection function as claimed in claim 1, is characterized in that described power circuit (2), in, single-phase alternating current LA, LN are depressured to exchange 12V, exchange 12V respectively through transformator T1 and are connected to sample circuit (4) The outfan of optocoupler IC5, exchange 12V is after TVS pipe D1 is protected simultaneously, then carries out rectification through gap bridge heap BRG1 and become straight Stream 12V, direct current 12V are connected to the power end of the Control chip IC 2 of communication and control circuit (1), and direct current 12V is more simultaneously Electric capacity C1 after filtering, C2, C3, C5 be connected to regulator block U1 input, and regulator block U1 exports direct current 5V electric capacity C6 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) are by Control chip IC 2, RS485 communication chip IC3, external control signal Input and DIP switch S1 composition, the outfan of Control chip is connected to magnetic protective relay, Control chip The input of IC2 is connected to the I/O port of the main control chip U4 of main control chip circuit (5), the data input of RS485 communication chip IC3 End is connected to the UART mouth of the main control chip U4 of main control chip circuit (5), and external signal input terminals is connected to main control chip circuit (5) I/O port of main control chip U4, the outfan of DIP switch S1 is connected to the I/O port of main control chip U4；

Described indicator light circuit (3) is made up of 5 road display lamps and corresponding audion resistance, and the control input of display lamp is even Receive the I/O port of main control chip U4；

Described sample circuit (4) is made up of electric leakage sample circuit, current sampling circuit and synchronous signal acquisition circuit, and electric leakage is adopted The output of 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 main AD0, AD1, AD2 mouth of control chip U4, the output of synchronous signal acquisition circuit is connected to the I/O port of main control chip U4；

Described main control chip circuit (5) is mainly made up of main control chip MC9S08AC60, crystal oscillator and programming circuit, main control chip The crystal oscillator input pin of MC9S08AC60 is connected to the AD mouth of crystal oscillator JZ, main control chip MC9S08AC60 and is connected to sample circuit (4) Sampling output pin, the I/O port of main control chip MC9S08AC60 be connected to indicator light circuit (3) input control foot, main control chip The input pin of the Control chip of the I/O port communication of MC9S08AC60 and control circuit (1), main control chip MC9S08AC60 UART mouth be connected to the input pin of RS485 chip in communication and control circuit (1), the I/O port of main control chip MC9S08AC60 Double hit to communication and control circuit (1) peripheral signal input part, the I/O port l of main control chip MC9S08AC60 be connected to communication and The outfan of the DIP switch S1 in control circuit (1).