CN206431273U - The logical pressure instrument apparatus of hand-held PT secondary circuits - Google Patents
The logical pressure instrument apparatus of hand-held PT secondary circuits Download PDFInfo
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- CN206431273U CN206431273U CN201621131756.0U CN201621131756U CN206431273U CN 206431273 U CN206431273 U CN 206431273U CN 201621131756 U CN201621131756 U CN 201621131756U CN 206431273 U CN206431273 U CN 206431273U
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- fixing groove
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Abstract
The logical pressure instrument apparatus of hand-held PT secondary circuits, including fixed mount, the side of fixed mount opens up the first fixing groove and the second fixing groove, second fixing groove is located at the bottom of the first fixing groove, the inside of first fixing groove is communicated with the second fixing groove, the logical pressure instrument body of hand-held PT secondary circuits is installed in the first fixing groove, expansion link of the present utility model can rotate, it can be erected when needing to use, widen the distance between fixing pipe and fixed mount by flexible simultaneously, now fixing pipe is used as handle, and convenient use person is hand-held.Fixing pipe of the present utility model can be used after being rotated by expansion link as support, make the logical pressure instrument body of hand-held PT secondary circuits prevent at an angle with desktop, convenient use person's viewing.
Description
Technical field
The utility model is related to a kind of hand-held intelligent terminal, the logical pressure instrument dress of specifically a kind of hand-held PT secondary circuits
Put.
Background technology
At present, the voltage transformer for each voltage class run in power system（PT）Large number of, model is different, new PT
During installation and operation, often asked because PT wiring errors cause the fusing of PT high-voltage insurances, low pressure air switch or insurance to disconnect or even burn PT etc.
Topic；Simultaneously because whole station secondary voltage circuit wiring is more complicated, it is difficult to grasp for Field Force, PT also often occurs and put into operation one
After the section time, when ground connection occurs for primary system or during short trouble, PT can not correctly reflect primary system voltage bis- times, cause to protect
Shield and automatic safety device malfunction or tripping, the safe and stable operation of serious threat system.Therefore polarity test should be carried out to PT
The method checked with secondary circuit pressurization, realizes and secondary voltage circuit is comprehensively and effectively checked, it is ensured that wiring correctness.
But traditionally detection PT second loop return wiring methods have the deficiency of the following aspects：Need with relay-protection tester in protection
The upper making alive analog quantity of device voltage terminal row, voltage circuit is more, and not in same place, has measured one group of voltage circuit
Need to move reaying protection test instrument, disconnect test wire, alternating current source tray is moved again, waste examination or repair time, work
Make efficiency low.Binding post is varied, and grafting test wire easily causes test wire and come off, and influences job schedule.Universal meter
Virtual value can only be read, therefore cannot be distinguished from single-phase AC voltage, when system power transmission, once short circuit, pole occur for ac circuit
Easily cause protection misoperation.Polarity test is unable to three-phase and carried out simultaneously, and test result can not be synchronous in the form of media file
Record.The logical pressure instrument apparatus of existing hand-held PT secondary circuits can not be converted into support state from hand holding state well.It is existing
The logical pressure instrument apparatus of hand-held PT secondary circuits can not be radiated well according to own temperature.
Utility model content
The purpose of this utility model is to provide a kind of logical pressure instrument apparatus of hand-held PT secondary circuits, can solve the problem that above-mentioned ask
Topic.
The utility model to achieve the above object, is achieved through the following technical solutions：A kind of hand-held PT secondary circuits lead to
Instrument apparatus, including fixed mount are pressed, the side of fixed mount opens up the first fixing groove and the second fixing groove, and the second fixing groove is located at first
The bottom of fixing groove, the inside of the first fixing groove is communicated with the second fixing groove, and hand-held PT secondary returnings are installed in the first fixing groove
The logical pressure instrument body in road, the inside bottom of the second fixing groove installs several deflectors, and the sidepiece of fixed mount opens up several through holes, through hole
Communicated with the inside of the second fixing groove, the sidepiece of fixed mount installs control device, blower fan and two expansion links, the air outlet of blower fan
Communicated with one of through hole, one end and the fixed mount of expansion link are hinged, the axial direction of expansion link and fixed mount pin joint is with stretching
Straight line is vertical where bar, and the other end of expansion link installs fixing pipe, and fix bar is installed in the inside of fixing pipe, and the sidepiece of fixing pipe is opened
If installation bolt in two screws, screw, the head of bolt, which is installed, installs TEMP on the inside of butterfly handle, the second fixing groove
Device, temperature sensor can pass through wire and control device with the logical pressure instrument body fits of hand-held PT secondary circuits, temperature sensor
Input connection, the output end of control device passes through wire connecting fan.
In order to further realize the purpose of this utility model, following technical scheme can also be used：Installed on the handle
Protective jacket.The deflector is parallel to each other.
The utility model has the advantage of：Expansion link of the present utility model can rotate, and can be erected when needing to use,
Widen the distance between fixing pipe and fixed mount by flexible simultaneously, now fixing pipe is used as handle, convenient use person
It is hand-held.Fixing pipe of the present utility model can be used after being rotated by expansion link as support, lead to hand-held PT secondary circuits
Pressure instrument body prevent at an angle with desktop, convenient use person viewing.Fixing pipe of the present utility model can be fixed on
In fix bar, fix bar can be fixed any shaft, so that the logical pressure instrument body of hand-held PT secondary circuits can be fast
Speed is fixed aloft, convenient use person's viewing.Fixing pipe can be fixed on fix bar by bolt of the present utility model by rotating
Proper height, it is to avoid fixing pipe slide, bolt of the present utility model be two can in a bolt looseness, another after
It is continuous fixing pipe is fixed on suitable height.One end of expansion link of the present utility model is hinged with fixed mount, can be in transport hand
When holding the logical pressure instrument body of formula PT secondary circuits, fold expansion link, it is to avoid expansion link space-consuming.Expansion link of the present utility model
With the axial direction of fixed mount pin joint with straight line is vertical where expansion link can further facilitate the storage of expansion link.The utility model
Fixed mount can prevent the logical pressure instrument body of hand-held PT secondary circuits from breaking.Temperature sensor of the present utility model can sense
Hand-held PT secondary circuits, which lead to the temperature of pressure instrument body and temperature signal is converted into electric signal, passes to control device, works as temperature
Spend high timed unit control blower fan to open, facilitate the logical pressure instrument body radiating of hand-held PT secondary circuits.It is of the present utility model
Deflector can make the air-flow in the second fixing groove more uniform, further facilitate the logical pressure instrument body of hand-held PT secondary circuits and dissipate
Heat.The utility model also has the advantages that compact, manufacturing cost simple for structure is cheap and easy to use.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
Mark explanation：1 fixed mount, 2 control device 3 first, 4 second fixing groove of fixing groove, 5 through hole, 6 blower fans 7 are hand-held
The butterfly of 13 bolt of logical pressure instrument body 8 deflector, 9 expansion link, 10 fix bar, 11 fixing pipe, 12 screw of formula PT secondary circuits 14
The protective jacket of handle 15.
Embodiment
The logical pressure instrument apparatus of hand-held PT secondary circuits, as shown in figure 1, including fixed mount 1, the side of fixed mount 1 opens up the
One fixing groove 3 and the second fixing groove 4, the second fixing groove 4 are located at the bottom of the first fixing groove 3, the inside of the first fixing groove 3 and the
Two fixing grooves 4 are communicated, and the logical pressure instrument body 7 of hand-held PT secondary circuits, the inner side of the second fixing groove 4 are installed in the first fixing groove 3
Several deflectors 8 are installed in bottom, and the sidepiece of fixed mount 1 opens up several through holes 5, and through hole 5 is communicated with the inside of the second fixing groove 4,
The sidepiece of fixed mount 1 installs control device 2, blower fan 6 and two expansion links 9, the air outlet of blower fan 6 and one of phase of through hole 5
Logical, one end and the fixed mount 1 of expansion link 9 are hinged, and axial direction and the place straight line of expansion link 9 of expansion link 9 and the pin joint of fixed mount 1 hang down
Directly, the other end of expansion link 9 installs fixing pipe 11, and fix bar 10 is installed in the inside of fixing pipe 11, and the sidepiece of fixing pipe 11 is opened up
Butterfly handle 14 is installed on installation bolt 13 in two screws 12, screw 12, the head of bolt 13, and the inner side of the second fixing groove 4 is installed
Temperature sensor, temperature sensor can coordinate with the logical pressure instrument body 7 of hand-held PT secondary circuits, temperature sensor by wire with
The input connection of control device 2, the output end of control device 2 passes through wire connecting fan 6.
Expansion link 9 of the present utility model can rotate, and can be erected when needing to use, while making fixing pipe by flexible
11 are widened with the distance between fixed mount 1, and now fixing pipe 11 is used as handle, and convenient use person is hand-held.The utility model
Fixing pipe 11 rotated by expansion link 9 after can be used as support, make the logical pressure instrument body 7 of hand-held PT secondary circuits with one
Fixed angle prevent with desktop, convenient use person viewing.Fixing pipe 11 of the present utility model can be fixed in fix bar 10,
Fix bar 10 can be fixed any shaft, so that the logical pressure instrument body 7 of hand-held PT secondary circuits can be fixed quickly
Aloft, convenient use person watches.Fixing pipe 11 can be fixed on fix bar 10 by bolt 13 of the present utility model by rotating
Proper height, it is to avoid fixing pipe 11 slides, bolt 13 of the present utility model be two can be when bolt 13 loosens, separately
One is continued to make fixing pipe 11 be fixed on suitable height.One end of expansion link 9 of the present utility model is hinged with fixed mount 1, can
In the logical pressure instrument body 7 of transporting hand-held PT secondary circuits, fold expansion link 9, it is to avoid the space-consuming of expansion link 9.This reality
Expansion link can be further facilitated with the axial direction of new expansion link 9 and the pin joint of fixed mount 1 is vertical with the place straight line of expansion link 9
9 storage.Fixed mount 1 of the present utility model can prevent the logical pressure instrument body 7 of hand-held PT secondary circuits from breaking.The utility model
Temperature sensor can sense the temperature of the logical pressure instrument body 7 of hand-held PT secondary circuits and temperature signal is converted into telecommunications
Number control device 2 is passed to, when the too high control of timed unit 2 blower fan 6 of temperature is opened, facilitate the logical pressure of hand-held PT secondary circuits
Instrument body 7 radiates.Deflector 8 of the present utility model can make the air-flow in the second fixing groove 4 more uniform, further facilitate hand
The logical pressure instrument body 7 of formula PT secondary circuits is held to radiate.
Protective jacket 15 is installed on the handle.Protective jacket 14 of the present utility model can grasp handle with convenient use person.
The deflector 8 is parallel to each other.Deflector 8 of the present utility model, which is parallel to each other, can make in the second fixing groove 4
Air-flow is more uniform, further facilitates the logical pressure instrument body 7 of hand-held PT secondary circuits and radiates.
The research of the system is to summarize transformer's type testing techniques of equipment in recent years, is carried on this basis according to national grid
The requirement of high site examining and repairing quality and efficiency, ensures that equipment safety operation carries out in-depth exploitation.
Following number designation is unrelated with part described in claim.
Therefore, it is necessary to develop it is a can compatibility PT is all needs the Integrated system of detection project, be that site examining and repairing is carried
For improving portable inspectiont means.PT secondary circuit complete detections are realized, project of transmitting and converting electricity power transmission quality is improved, to improving power network
The safe operation of equipment has great practice significance：The labor intensity of PT secondary circuits inspection can be substantially reduced, saves big
The human and material resources of amount, financial resources.The project implementation, can detect protection personnel hand-held instrument, replace traditional relay protection
Test instrument, substantially reduces labor intensity, improves operating efficiency.Press instrument that voltage is passed through into PT secondary circuits when protection librarian use is logical
When, the protection personnel of opposite side can measure on voltage circuit, when detecting that there are short circuit or paraphase failure in the loop, and two
The logical pressure same alarm of instrument in side, at the same time, display screen display are short-circuit or paraphase separate, so that rapidly removing faults point, to send
The electric saving time.The logical pressure instrument possesses video monitoring and recording function, and energy automatic access data, is that new equipment is checked and accepted and technology
Retrofit work offer practical data, offer easily technical support is smoothed out for what guarantee examination and technological transformation worked.
2nd, system design cooling load and major technique are crucial
A general PT secondary circuit detection techniques are developed, the logical pressure of secondary circuit DC source and Fault Identification, pole is completed
Property test, fast video record three zones, realized on winCE platforms software, hardware and other interface compatibilities combination, tool
Standby hand-held, accurate, flexible, quick, directly perceived the features such as, it is easy to scene protection personnel's service work.
Key technology：
The software and hardware program for completing the logical pressure instrument of PT secondary circuits are built, and complete the outward appearance technological design of logical pressure instrument.
President's design of the logical pressure instrument of PT secondary circuits is completed, wherein leading to comprising polarity test system, secondary circuit DC source
Pressure and Fault Identification and the part of fast video record system three.Design, making, installation and the debugging of polarity test system are completed,
Realize that PT secondary circuits polarity test works, the labor intensity of reduction PT secondary circuits polarity test work.Complete secondary circuit
Design, making, installation and the debugging of fault finding system, when there are short circuit or paraphase failure in loop, realize fault alarm, are fast
Speed, which is fixed a breakdown, provides a good precondition.Complete DC source and lead to design, making, installation and debugging that system is sent in pressure,
Long-time accurate delivery source is provided for the logical pressure work of PT secondary circuits direct current, also presses work to provide surely to realize that PT secondary circuits are logical
Fixed reliable power-supply system.Design, making, installation and the debugging of fast video record system are completed, realizes that PT secondary circuits are straight
The file access system for the pressure that circulates, provides abundant data for the logical pressure work of PT secondary circuits and supports.
3rd, main research and research and development process
Main research, the instrument replaces the secondary logical pressure equipment such as traditional relay protection protection tester, can be accurate
Quickly judge the correctness of PT second loop return wirings.
Built-in Chargeable direct current power supply and Switching Power Supply, drawing AS, BS, CS, NS by device, totally 4 universal power supply outputs connect
Mouthful, AR, BR, CR, NR totally 4 general-purpose potential measurement input interfaces are drawn, 4 universal power supply interfaces are exported as power supply, respectively
It is connected on the cable source end line core of PT secondary circuits, 4 general-purpose potential measurement interfaces are connected on PT secondary circuits core to be measured,
The both positive and negative polarity relation shown using device judges the correctness of secondary connection.
Possess fault finding system, be capable of the failure situation of automatic discrimination secondary loop short circuit or paraphase, and will can differentiate
As a result show on a display screen, be to realize fault alarm, be easy to rapidly removing faults point.
Solve conventional AC to lead under pressure mode, it is impossible to judge both threads core wiring correctness problem.
Universal interfacing is adapted to various protection screen terminal blocks, is easy to connection, and plug and play thoroughly avoids loop short circuit and surveyed
Measure influence of situations such as point, face loose contact to measurement result.
Clear accurate, flexible, light, using PDA structures, built-in windowsCE operating systems can automatically be recorded, transferred
Measurement result.
By host computer interface camera can be controlled to carry out video monitoring, video recording and play back.The logical pressure instrument possesses video
The video camera of monitoring and video recording, the microampere meter for judging PT polarity, the control developed based on Freescale single-chip microcomputer and Acquisition Circuit,
Power supply and the integrated harness connector plug for being connected with each test coil, the test data that slave computer is transmitted is shown and deposited
Storage.
System is constituted
The multifunctional mutual-inductor tester of exploitation is made up of host computer and slave computer two parts.
Host computer includes a computer, video frequency collection card and a set of application software developed based on Visual C++.It is upper
Machine software is by the mode of operations of 485 bus marco slave computers, while being shown and being deposited the test data that slave computer is transmitted
Storage.By host computer interface camera can be controlled to carry out video monitoring, video recording and play back.
Slave computer includes being used for video monitoring and the video camera recorded a video, judges the microampere meter of PT polarity, based on Freescale
The control of microcomputer development and Acquisition Circuit, power supply and the integrated harness connector plug for being connected with each test coil.
Thought of design
Host computer is designed
The host computer interface of exploitation mainly includes following functions：
Video frequency collection card is controlled to carry out display and recording function in real time.
Slave computer switch test function is controlled, the test of the logical pressure of polarity test, DC source and Fault Identification is realized, and will be surveyed
The result of examination is shown on screen.
Slave computer is designed:Single-chip microcomputer in slave computer is intended using Freescale single-chip microcomputer, and the function of the MCU of the brand is rich
Richness, with stronger interference free performance, is widely used in automotive electronics at present.Intend in the system using DZ series
12,24 tunnel AD is carried in single-chip microcomputer, the single chip microcomputer, the need for measuring accuracy being met, in addition, the single-chip microcomputer possesses rich
The peripheral hardware such as rich communication and input/outgoing interface, the need for system development being met.
Slave computer receives the instruction of host computer, and according to the function of test, the test of difference in functionality is realized by relay,
The switching schematic diagram of relay.Any one in 8 windings is all to employ 28 pin single-pole double-throw relays.Wherein first
It is that to be used for selection be to survey polarity, or surveys logical pressure/Fault Identification.
When test loop polarity chron, video frequency collection card is controlled by upper computer software first, video is opened and shows and record a video；
The SCM system in slave computer is controlled by way of 485 communicate, relay is switched to polarity test function, now passed through
Video acquisition function gets off the action record of each microampere meter.
During logical pressure test, intend the mentality of designing using constant pressure source, constant voltage power supply circuit is connected in test wire loop, root
The voltage of constant pressure source is designed according to the resistance of coil, A, B, C three-phase dc magnitude of voltage are exported respectively.SCM system is permanent by testing
Voltage is produced during voltage source current flowing through coil to calculate the resistance of coil.
Systemic-function:The logical pressure instrument of hand-held PT secondary circuits possesses：The logical pressure of secondary circuit DC source and Fault Identification, polarity
Test, fast video record three sport test functions.
Polarity test:PT polarity tests must use pointer header, while using 8 pieces, with the different voltage class of correspondence
PT secondary winding numbers；Judge PT polarity and class of accuracy using microampere meter yawing moment, amplitude.
The logical pressure of DC source and Fault Identification test can test PT secondary circuits whether there is short circuit or paraphase phenomenon.
Fast video is recorded, and records test result.
System is constituted:The logical pressure instrument of the PT secondary circuits of exploitation is made up of host computer and slave computer two parts, and system architecture is shown
It is intended to as shown below.
Host computer includes a computer, video frequency collection card and a set of application software developed based on Visual C++.It is upper
Machine software is by the mode of operations of 485 bus marco slave computers, while being shown and being deposited the test data that slave computer is transmitted
Storage.By host computer interface camera can be controlled to carry out video monitoring, video recording and play back.
Slave computer includes being used for video monitoring and the video camera recorded a video, judges the microampere meter of PT polarity, based on Freescale
The control of microcomputer development and Acquisition Circuit, power supply and the integrated harness connector plug for being connected with each test coil.
Thought of design
Host computer is designed, and upper computer software interface is designed using Visual C++ translation and compiling environments, and VC++ is in visualization interface
Design aspect is powerful, the need for can meeting system development.
In order to realize video real-time display and recording function, it is necessary to purchase video card, pass through upper computer software control
The work of video card processed, the communication interface of current video card has the various ways such as usb bus and pci bus, it is contemplated that scene is dry
Serious situation is disturbed, and usb bus is comparatively, antijamming capability is less better, therefore, preliminary intend using pci bus
Video frequency collection card.
The host computer interface of exploitation mainly includes following functions：Video frequency collection card is controlled to carry out the work(that shows and record a video in real time
Energy；Slave computer switch test function is controlled, realizes that secondary circuit DC source leads to pressure, polarity test, Fault Identification, and by test
Logical pressure, polarity test, the result of Fault Identification are shown on screen.
The skins of design, wherein be that the DC source tested leads to pressure, Fault Identification and polarity test result above, wherein
The text box of the first row the 1st ~ 3 is source DC source voltage value, and the 4th ~ 6 text box is A, B, C direct current when measured end is three-phase
Supply voltage value, the 7th text box is single-phase voltage value when measured end is single-phase, and the 8th text box is that Fault Identification tests knot
Really.
The polarity test result of all PT secondary circuits of second behavior.
Single-chip microcomputer in slave computer is intended using Freescale single-chip microcomputer, and the function of the MCU of the brand enriches, with stronger
Interference free performance, be widely used at present in automotive electronics.Intend using DZ series monolithics, the list in the system
12,24 tunnel AD is carried in piece Bigpian, the need for measuring accuracy being met, in addition, the single-chip microcomputer possesses abundant communication and defeated
The peripheral hardwares such as entry/exit interface, the need for system development being met.
Slave computer receives the instruction of host computer, and according to the function of test, the test of difference in functionality is realized by relay,
The switching schematic diagram of relay.Any one in 8 windings is all to employ 18 pin single-pole double-throw relay.It is to be used to select
It is to survey loop polarity to select, or surveys the logical pressure of DC source, Fault Identification, can be ensured by the switching of relay while can only test
1 kind of function.
When test loop polarity chron, video frequency collection card is controlled by upper computer software first, video is opened and shows and record a video；
The SCM system in slave computer is controlled by way of 485 communicate, relay is switched to polarity test function, now passed through
Video acquisition function gets off the action record of each microampere meter.
When test DC source leads to pressure, because resistance is larger, intend the mentality of designing using constant pressure source, by constant voltage power supply circuit
During lead-out wire is connected in the terminal block of PT secondary circuit sources, another logical pressure instrument is then connected on tested PT secondary circuits
Tested end DC voltage is measured in terminal block, and carries out Fault Identification.
Constant pressure source generation module is constituted with TL431 devises 4 road constant pressure source test circuits in constant pressure source, figure, to each
The progress respectively of individual winding provides voltage simultaneously, each winding one constant voltage power supply circuit of correspondence, for constant voltage power supply circuit, on
R2, R3, R5, R6, R8, R11, the R12 in face are the bases of R1, R4, R7, R10 generation constant pressure source in the current-limiting resistance to TL431, figure
Standard, triode 9013 is mainly to provide safe constant current, through actual test, ensures that final voltage is linear.
Upper two modules of U1, U2 are difference operational amplifying circuit, using LMV358 difference operational amplifying circuits, and each module is 2 tunnels,
The pins of LMV358 the 8th meet positive supply 5V, and with connecing power supply, 3 pins, 2 pins, 1 pin constitute one group of amplifier to 4 pins, and 5,6,7 draw
Pin constitutes in addition amplifier all the way, and 3 pins connect in-phase input end, and 2 pins connect inverting input, and 1 pin connects output end, 5 pins
It is another road in-phase input end, 6 pins connect inverting input, and 7 pins are output ends.For amplifier, 3,2 pins typically connect
Input resistance R15, R14, value be 1 ~ 10k, 1,2 pins access feedback resistance R16, its size according to amplification voltage multiple come
Selection, 1 pin connection electric capacity R17 and voltage-regulator diode D6, is to obtain more preferable output signal, voltage-regulator diode D6 effect
It is to carry out amplitude limiting processing after amplifying to D.C. resistance, is defined when voltage is more than 4.7V, if the voltage stabilizing two without 4.7V
Pole pipe D6 is defined, and single chip circuit receives interference, or when receiving big impact, can be burnt out single-chip microcomputer, when entering
There is strict symmetrical, suppression common mode interference during row differential mode computing.3rd, 4 pin institute connecting resistances are wanted and feedback resistance is equal in magnitude, warp
Cross resistance R23 and electric capacity C6 and constitute the passive RC filter circuits of single order, voltage-regulator diode D6 is protected to output valve, most at last
Voltage is sent to the AD passages of single-chip microcomputer, and current sampling resolution is 12, it is ensured that sampled value is bigger, adjusts the times magnification of amplifier
Number, so as to adjust constant pressure numerical value.
One-chip computer module uses Freescale DZ60 single-chip microcomputers, and the chip of 64 pins, its AD passage, 7 drive test amounts lead to piezoelectricity
Pressure value, 7 drive test amount Fault Identification magnitude of voltage in addition, using 16 pins come the switching of control relay, so as to realize secondary returning
The logical pressure of road DC source and Fault Identification, polarity test.7 tunnels are tested the AD sampled results held in DZ60 by fault-recognition program
Compare, output result is exported to LCD1, LCD2, by 485 bus output valve cable software kits, and control 2 fingers respectively
Show lamp, to indicate current sample states.The I/O interface of control relay switching, makes the switching of this pin control relay, has
Two electric capacity C2, the C3 and crystal oscillator X1 changed constitute crystal oscillating circuit there is provided the working frequency of single-chip microcomputer, and capacitance size is 20-
30pF, crystal oscillator is 4Mhz, can also improve crystal oscillator clock frequency, and it is that power supply is carried out that 5V, which meets 104 electric capacity C4, C5, in figure
Filtering, 5V power supplys indicate the working condition of master control borad by resistance R1, R2, diode D1, D2 and LCD1, LCD2.9 pins
EXTAL and 10 pin XTAL connection single-chip microcomputers input/output interface, when LCD1, LCD2 output interface are output as 5V, are indicated
Lamp is dark, when being output as low level, and indicator lamp is bright.Itself can control to complete the sampling of magnitude of voltage, can control
The switching of relay processed carries out the logical pressure of DC source and Fault Identification, polarity test, and data then are passed into computer by 485 communications
Up.
The power module module provides power supply for single-chip microcomputer, and power module is LM2596, is powered by 12V power supplys, through R25 electricity
Resistance, accesses a pin IN, and resistance sizes are 4 ohm, and it is to carry out current limliting to the voltage 12V of input that it, which is acted on, and its maximum current is
No more than 3A, D5 diodes have one-way conduction, and when its effect is reverse power connection when preventing 12V and ground reversal connection, this module is not
It can burn out, F1 can voluntarily recover for that can recover insurance after blowing, electric capacity C14 is to suppress interference signal, and electric capacity C15 is to voltage
It is filtered, and can stores compared with multi-energy, maintain single-chip microcomputer voltage not fluctuate, LM2596 is the voltage stabilizing mould of voltage-dropping type
Block, 5V is output to by 12V, and out pins are output, and pass through inductance L1 network consisting filtering process, and the 5V stablized is exported,
So as to provide reliable source of power for single-chip microcomputer.
Relay control module realizes the logical pressure of secondary circuit DC source and Fault Identification, polarity test switching.Relay is cut
Two functions have been changed, 16 relays are controlled altogether.
Isolation module TLP521-4 effects are the height electricity for the low and high level and control relay for exporting single-chip microcomputer pin
Ordinary telegram source is entirely isolated, and plays a part of protecting single-chip microcomputer.TLP521-4 mono- has the isolation of 4 tunnels, 1 pin, 2 pins, 15
Pin, 16 pins are to isolate all the way, and 3 pins, 4 pins, 13 pins, 14 pins are the isolation of the second tunnel, and 5 pins, 6 pins, 11 are drawn
Pin, 12 pins are the isolation of the 3rd tunnel, and 7 pins, 8 pins, 9 pins, 10 pins are the isolation of the 4th tunnel.Control switching principle
For：Using 1 pin, 2 pins, 15 pins, 16 pins to illustrate, 1 pin meets power supply 5V, and 2 pins connect single-chip microcomputer output pin, and 1 draws
Pin, 2 pins equivalent to light emitting diode anode and negative electrode, when 2 pins are output as low level, LED operation, 15
Pin, 16 pins are light emitting transistors, are now turned on, 15 pin out1 output signals.
Power amplifier module is output to power amplifier module MC1413 by the isolation module OUT1 in relay control module,
By being made up of Darlington pipe, each MC1413 is that, containing 7 tunnel Darlingtons pipe, the reason for it is by power amplifier module is to pass through
TLP521-4 isolation after signal when it is fainter, be not enough to drive relay, the operating current of the primary coil of relay
Than larger, it is necessary to which MC1413 is amplified to this electric current.MC1413 possesses 16 pins, and 8 pins are ground, and 9 pins are power supplys
Just, 1 pin, the 16 pin first via, 2 pins, 15 pins are the second tunnels, by that analogy.When 1 pin is high level, 9 pins are just
Power supply 12V is turned on by Darlington pipe, is exported by 16 pins, and 16 pins are output to this one end of the primary coil of relay, most
Whole single-chip microcomputer output pin is by isolation, power drive most this section of Zhongdao primary coil come the switch operating of control relay.
Relay module driving principle：If the controlling switch 1 of single-chip microcomputer is low level, two poles of TLP521-4 isolation modules
Pipe works, and 15 pins can just export high level, the power drive amplifying circuit that 15 pins output high level is constituted to MC1413
Pin 1, when pin 1 is high level, amplifying circuit work, it is primary that positive supply 12V is output to relay by 9 pins to 16 pins
This side of the negative pole of coil, relay is just normally closed, when single-chip microcomputer is output as high level, TLP521-4 isolation module light-emitting diodes
Manage this side not work, this side of photosensitive triode does not also work, high level also can not just reach MC1413, i.e. MC1413 controls
Hold as low level, do not work.This one end of relay primary coil is ground potential, and positive supply 12V work, primary coil is powered, after
Electrical equipment is switched to normally opened end, and this completes the driving work of relay module.
Mainly SCM program is downloaded and debugged and is used, this is a fixed connection, this module, which is that 6 needle stands are slotting, to be downloaded
Device, 9 pins are insulating power supply modules, using BDM.5V is inputted, output is 5V, middle by isolation, C10 electric capacity is to input
Voltage is filtered, and the Europe of connecting resistance 250 produces electric current between positive-negative power, could be reliably when insulating power supply needs load
Work, complete software download and debugging.
It is the logical pressure of secondary circuit DC source that 485 communication modules collect single-chip microcomputer and Fault Identification, polarity test, quick
Videograph, computer is passed to up by communication, the file of generation measurement on computers, measurement result is preserved, wherein three
HCPL0600 high speed optoelectronic isolation modules, high speed optoelectronic isolation module includes a light emitting diode and light emitting transistor, effect
That protection single-chip microcomputer is damaged when receiving noisy signal, Phototube Coupling is single channel isolation, 8 pins composition all the way photoelectricity every
From.
Single-chip microcomputer output signal is connected to RXD0 pins, and it is the pin that Investigation into Serial Communication of One-chip Computer is received, and RXD0 is height electricity
Flat, 3 pin RS485-1 are controlling switch, and when it is high level, 2 pins and 3 pins are anode and negative electrode, and light emitting diode is not
Work；When 3 pin RS485-1 are low level, diode operation, out is output as low level.
TXD0 is connected to by single-chip microcomputer output signal, it is the pin of the transmission data of Investigation into Serial Communication of One-chip Computer, single-chip microcomputer is
During high level, diode does not work, and is sent to U4 DI pins, is ultimately routed in 485 buses, completes the work of 485 buses.485 lead to
The core of news is the chip of this 8 pin of U4, receives and dispatches receiver, and 1 pin is data output pins, and 4 be data receiver pin, 2
Pin, 3 pins are come the pin that controls to receive or send.2nd, it is to send during 3 pin high level, low level is for reception.6th, 7 draw
The differential signal that pin constitutes 485 buses is formed on A, B, and R63 ~ R64 effects are to avoid in all transmitters prohibiting in bus
Logical zero can be exported when only, single-chip microcomputer is mistakenly considered communication frames and starts again, this is done to ensure that communication is correct.
The logical pressure of PT secondary circuits DC source and Fault Identification, polarity test function are completed by above-mentioned modular circuit.
The technical solution of the utility model is not restricted in the range of embodiment described in the utility model.This practicality is new
The technology contents of the not detailed description of type are known technology.
Claims (3)
1. the logical pressure instrument apparatus of hand-held PT secondary circuits, it is characterised in that：Including fixed mount (1), the side of fixed mount (1) is opened up
First fixing groove (3) and the second fixing groove (4), the second fixing groove (4) are located at the bottom of the first fixing groove (3), the first fixing groove
(3) inside is communicated with the second fixing groove (4), and the logical pressure instrument body of hand-held PT secondary circuits is installed in the first fixing groove (3)
(7), the inside bottom of the second fixing groove (4) installs several deflectors (8), and the sidepiece of fixed mount (1) opens up several through holes (5),
Through hole (5) is communicated with the inside of the second fixing groove (4), and the sidepiece of fixed mount (1) installs control device (2), blower fan (6) and two
Expansion link (9), the air outlet of blower fan (6) is communicated with one of through hole (5), and one end and the fixed mount (1) of expansion link (9) are cut with scissors
Connect, the axial direction of expansion link (9) and fixed mount (1) pin joint is vertical with straight line where expansion link (9), the other end of expansion link (9)
Fixing pipe (11) is installed, fix bar (10) is installed in the inside of fixing pipe (11), and the sidepiece of fixing pipe (11) opens up two screws
(12) install on the inside of butterfly handle (14), the second fixing groove (4) on, screw (12) interior installation bolt (13), the head of bolt (13)
Mounting temperature sensor, temperature sensor can coordinate with the logical pressure instrument body (7) of hand-held PT secondary circuits, and temperature sensor passes through
Wire is connected with the input of control device (2), and the output end of control device (2) passes through wire connecting fan (6).
2. the logical pressure instrument apparatus of hand-held PT secondary circuits according to claim 1, it is characterised in that：Installed on the handle
Protective jacket (15).
3. the logical pressure instrument apparatus of hand-held PT secondary circuits according to claim 1, it is characterised in that：The deflector (8)
It is parallel to each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621131756.0U CN206431273U (en) | 2016-10-18 | 2016-10-18 | The logical pressure instrument apparatus of hand-held PT secondary circuits |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621131756.0U CN206431273U (en) | 2016-10-18 | 2016-10-18 | The logical pressure instrument apparatus of hand-held PT secondary circuits |
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| CN206431273U true CN206431273U (en) | 2017-08-22 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
-
2016
- 2016-10-18 CN CN201621131756.0U patent/CN206431273U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107450042A (en) * | 2017-09-21 | 2017-12-08 | 国家电网公司 | A kind of current transformer detecting system |
| CN107450042B (en) * | 2017-09-21 | 2023-07-04 | 国家电网公司 | Current transformer detecting system |
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