A kind of straight-flow system seal calibration equipmentTechnical field
The utility model is related to technical field of electric power detection, and in particular to a kind of straight-flow system seal calibration equipment.
Background technology
DC system grounding detects, and generally can be divided into three parts content, i.e. ground connection alarm, earthing wire-selecting and earthing searching；Earthing wire-selecting is usually put together with ground connection alarm detection, is referred to as installing type earthing detection equipment, and is used for earthing searchingIt is then portable earthing detection equipment.
Ground connection alarm：It is when straight-flow system is grounded, sends alarm signal in time, operation maintenance personnel is notified to arriveField processing；
Earthing wire-selecting：After generation ground connection alarm, by fault location to direct current branch, fault coverage can be reduced；
Earthing searching：Specific abort situation is determined, to exclude earth fault.
In the past, domestic electrical system only had ground connection alarm detection function substantially, and was manufactured almost exclusively by balance bridge loop inspectionIt surveys, when leakage current reaches setting valve, sends alarm signal.Service personnel can only determine to connect by operating a switch, shaking the methods such as insulationGround leg and specific earthing position, so do not only dangerous, but also take very much, is laborious, running into complicated ground connection, do not do sometimesMethod processing；Nearly ten years, domestic institution of higher learning and R＆D institution have carried out substantial amounts of research in DC system grounding context of detectionWith exploitation, all kinds of earthing wire-selectings and portable earthing searching equipment are produced, have been that electric system is widely used now.
At present, the domestic 110KV newly to put into operation and ratings above substation, mostly employ inspection device, old to stand also successivelyIncrease this kind equipment, it is estimated that, the online inspection device in the whole nation has nearly ten thousand sets, and portable device also has nearly thousand sets.These are by stateInterior dozens of producer each researches and develops the equipment with production, in the original of ground connection alarm, earthing wire-selecting and the detection of earthing searching three partsReason is also varied with method.However, either inspection device or portable unit, the country is currently without unified inspection markStandard, also without detection means, relevant departments can not periodically test to more than equipment；In addition, each producer is in production direct currentDuring earthing detection equipment, the functional, detection of security is not systematically carried out, technical indicator is very lack of standardization, and user selects productionIt during product, is only publicized with each manufacturer, the technical indicator not can refer to, compareed, thus is difficult to choose conjunction symbol actual conditionsProduct.
Due to more than various reasons, in the practical application for causing these products, whether ground connection alarm resistance value does not know accuratelyRoad, earthing wire-selecting is also often incorrect, and portable earthing searching equipment can be searched and cannot searched sometimes sometimes, tie up operationShield personnel worry also to be not very willing to handle DC system earth fault very much, very strong suspection attitude are held to this kind equipment, insteadCome over to hinder the popularization and application of equipment, return to manually to operate a switch and search earthing mode；It is extremely difficult due to manually searching ground connection, haveWhen can also cause safety responsibility, it (is not to be bound to draw because earth fault occurs that idea of leaving things to chance is even cherished by some maintenance departmentsPlay malfunction, the tripping accident of the equipment such as protection), alarm resistance threshold value is grounded by reducing, to reduce ground connection alarm number, is givenSystem safety belt carrys out hidden danger.
Therefore, research and development, production, debugging or the user of either manufacturer select product with using process in equipmentIt is whether intact, there is an urgent need to the calibration equipment that market provides DC system grounding, and propose the standard and content of verification, so thatDC system grounding detection can be expressly understood that performance, quality and security reliability of product etc. from research and development to application.
Utility model content
Based on this, in view of the above-mentioned problems, it is necessary to propose a kind of straight-flow system seal calibration equipment, the utility modelIt is run using intelligence, substantial amounts of man power and material is avoided to put into above the operation and maintenance of device, while device is made to locate alwaysIn good working order, prolong the service life, make its verification data more accurate；Its is small, simple in structure, conveniently takesBand, and with warning function, ensure that the security in checking procedure；It can be verified online or offline, applicability is high, energyMeet it is a variety of in the case of verifying work, improve verification efficiency and accuracy rate.
The technical solution of the utility model is as follows：
A kind of straight-flow system seal calibration equipment, including housing, the housing is equipped with multiple perforates, and housing is openedHole is equipped with switch, alarm lamp, positive and negative anodes wire clamp interface, earthing clamp interface and variable resistor, and variable resistor one end is connectedSwitch, alarm lamp and positive and negative anodes wire clamp interface, other end connection earthing clamp interface, the positive and negative anodes wire clamp interface and ground wireContact slot is equipped in clamping connection mouth；Be equipped in the housing regulated power supply module, capacitance-resistance array module, AC power supply module,Accurate measurement module, human-computer interaction module and main control module, the regulated power supply module, capacitance-resistance array module, alternating currentSource module, accurate measurement module and human-computer interaction module control with main control module connect respectively.
Insulation monitoring device or portable earthing searching instrument are verified by the cooperation of each module, made by effect equipmentNormal use is in the detection of straight-flow system, it is ensured that straight-flow system safe and stable operation；The utility model can be realized to off-line modeWith the verification of on-line mode, offline and online switching is realized by the opening and closing for adjusting regulated power supply module；Regulated power supply moduleBuilt-in current-limiting function and short-circuit protection function, output have a relay, when system works in on-line model, at the relayIn off-state, when system is operated in off-line mode, which is closed；Wherein：
In disconnection mode, tested device can be exited to former monitoring system, the mould that access the utility model tester providesIntend in straight-flow system, in the analog DC system, by main control module to capacitance-resistance array module and AC power supply module etc.Various combination control, can complete to be tested insulating detection equipment various functions verifying work；
Under in on-line model, the utility model tester can be accessed in the same system to work with tested device, at this point,Regulated power supply module inside tester is in off state, and all verifying function items will carry out in former straight-flow system；
Power on, open after switch and to select picture into operating mode, picture is present with on-line testing and offlineTest option；
If selecting on-line testing, system will prompt test lead connecting line whether correct access system, determine testHold connecting line that can be selected under the interface into on-line testing bulleted list main menu by determination key after correctly accessingCan on-line testing various functions, may return to model selection interface by return key；
After plus earth test is selected under on-line testing item-function selects menu, i.e., into plus earth test settingInterface, in the interface, user may be selected 1-5 plus earth test point and be tested, and have √ to do before selected test pointMark, each test point can be configured by clicking on the dummy keyboard occurred on screen after the test point, test intervalAlso it is the time interval of the adjacent test point of each two, test interval can be in 5-999S for the testing time of each test pointBetween be configured, under the interface, upper level function selection picture is returned to by return key, by starting to survey after being provided withExamination button enters plus earth test interface；In plus earth test interface, one column of Impedance measurement shows to be that user choosesTest point；Current Impedance measurement：Represent current impedance ground；Time：Testing time, reach set test interval afterInto the test of next test point, after the last one test point time reaches setting value, auto-returned upper level interface；JustVoltage-to-ground：Show current anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Display is justVoltage between pole and cathode；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is disconnected or closedIt closes；Current test can be exited by test button is stopped during the test, return to upper level and interface is set；
After cathode earthing test is selected under on-line testing item-function selects menu, i.e., set into cathode earthing testInterface, test process are tested similar with plus earth；
After the two poles of the earth earthing test is selected under on-line testing item-function selects menu, i.e., set into the two poles of the earth earthing testInterface, in the interface, user may be selected 1-5 groups the two poles of the earth earthing test point and be tested, and have √ to do before selected test groupMark, each test point can be configured by clicking on the dummy keyboard occurred on screen after the test point；Carry out the two poles of the earth ground connectionDuring test, the sum of impedance ground need to be more than or equal to 10 kilo-ohms during positive and negative electrodes in same, and test interval is the test of each test groupTime is also the time interval of the adjacent test group of each two, and test interval can be configured between 5-999S；On the boundaryUnder face, upper level function selection picture is returned by return key, enters the two poles of the earth ground connection by starting to test button after being provided withTest interface；In the earthing test interface of the two poles of the earth, one column of Impedance measurement shows to be test point that user chooses；Current test resistanceIt is anti-：Represent current the two poles of the earth impedance ground；Time：Testing time reaches and test interval is set to enter next group of test afterwardsThe test of point, after last group of test point time reaches setting value, auto-returned upper level interface；Positive voltage-to-ground：DisplayCurrent anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Between display positive electrode and negative electrodeVoltage；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is opened or closed；In test processIn can exit current test by test button is stopped, returning to upper level and interface be set；
After voltage accuracy test is selected under on-line testing item-function selects menu, i.e., into voltage accuracy test promptsInterface, the voltage accuracy test under on-line mode can only test current system voltage value, if you need to the precision of more electrical voltage points intoRow test, need to be tested in disconnection mode, pressed and started to enter test interface after test；Under the interface, display is justVoltage-to-ground, negative voltage between voltage-to-ground and system positive and negative anodes, are carried out by above-mentioned voltage measuring value and tested deviceComparison, judges whether its voltage measurement accuracy conforms to requirement, can stop current test by feeler switch is stopped in test process, returnUpper level interface；
After balanced bridge detection is selected under on-line testing item-function selects menu, i.e., detect and prompt into balanced bridgeInterface, the detection of balanced bridge can provide the accurate information of system balancing bridge for operation maintenance personnel, during the test, reallyDetermining equipment under test will not be to system Injection Signal；It presses after starting test, waits 1-2 minutes, it will test result picture occurFace, after test is completed, which will calculate the positive earth impedance of system under test (SUT), bear earth impedance and system balancingAfter detection is completed, upper level prompting interface can be returned by return key for bridge size；
After the anti-distribution capacity test of system is selected under on-line testing item-function selects menu, i.e., into the anti-distribution of systemCapacity measurement parameter setting interface, under the setting interface, user can be to system plus earth resistance, system cathode ground connection electricityResistance, the positive direct-to-ground capacitance of system, system bears direct-to-ground capacitance and is combined setting, with √ as mark before the test condition chosen,The resistance value or capacitance of each test condition can be set, and the testing time can be set between 5-999S；Parameter is setAfter putting completion, enter the anti-distribution capacity test interface of system by feeler switch is started, which goes out current system test pointCloth capacitance and test resistance resistance value, after the testing time that the testing time reaches setting, an interface on auto-returned, test processIn, it also can stop current test by feeler switch is stopped, returning to upper level and menu is set；
The anti-distribution capacity test of branch is similar in interface display in parameter setting to the anti-distribution capacity of system, specific to testProcess is referred to the anti-distribution capacity test of system；
It is selected in on-line testing item-function under menu after selection signal integration test, i.e. entering signal integration test parameterInterface is set, in signal synthesis test setting interface, can be connect with the condition of selection signal analysis, i.e. plus earth or cathodeGround, and the big I of grounding resistance is set, the testing time can be set；When setting, positive ground resistance and negative ground connection electricityResistance can only select one of which to be tested, after being provided with, by test entering signal integration test interface is started, on the boundaryIn face, it can show the parameters such as equipment under test wavy curve, signal amplitude, signal power, can be pressed in test process by test is stoppedKey stops current test, returns to upper level and sets interface；
If selection off-line test, i.e., picture is selected into voltage class, tester tested is set what is selected according to userStandby voltage class controls suitable DC output voltage, and voltage class selection mistake will likely cause the damage of equipment under test,Tester provides four voltage class and is selected for user altogether, after the voltage class for determining equipment under test, enters by determination keyOff-line test bulleted list main menu, in off-line test project, plus earth test, cathode earthing test, the two poles of the earth ground measuringExamination, balanced bridge detection, the test of system anti-distribution capacity, the anti-distribution capacity test of branch and signal synthesis test function item withLine is the same when testing, and the voltage function test in off-line test is illustrated with AC earth test below：
Voltage function test item can verify the voltage measurement accuracy of equipment under test with voltage out-of-limit function；OfflineAfter selecting voltage function test under test event function selection menu, i.e., interface is set into voltage function test parameter, at thisIn interface, user may be selected 1-5 voltage test points and be tested, and have √ to make marks before selected test point, each to testPoint can be configured by clicking on the dummy keyboard occurred on screen after the test point, and test interval is each test pointTesting time is also the time interval of the adjacent test point of each two, and test interval can be configured between 5-999S；Under the interface, upper level function selection picture is returned by return key, enters voltage by starting to test button after being provided withFunctional test interface；In voltage function test interface, one column of test voltage point shows to be test point that user chooses；CurrentlyTest voltage：Represent current test voltage point；Time：Testing time reaches and sets test interval afterwards into nextThe test of test point, after the last one test point time reaches setting value, auto-returned upper level interface；Positive voltage-to-ground：Show current anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Show positive electrode and negative electrodeBetween voltage；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is opened or closed；It is testingCurrent test can be exited by test button is stopped in the process, return to upper level and interface is set；
AC earth test item will apply an AC signal on DC power supply, to the AC earth function of equipment under test intoRow effect；
After AC earth test is selected under off-line test item-function selects menu, i.e., into AC earth test parameterInterface is set, and in the interface, AC ground voltage grade and AC earth polarity, AC ground voltage grade may be selected in userOne of which can be only selected with AC earth polarity；After parameter setting is completed, AC earth effect is carried out by feeler switch is startedIt tests, the poles such as current system AC ground voltage and polarity of ground and contact 1 and 2 state of contact, test process is shown in the interfaceIn can stop current test by feeler switch is stopped, returning to upper level and interface be set；
By above online or off-line test, make the straight-flow system seal calibration equipment of the utility model with followingFunction：
Insulation monitoring device or portable earthing searching instrument can be verified online or offline；
Device has plus earth test function, can carry out plus earth measuring accuracy and plus earth report to tested deviceAlert precision is tested；
Device has the function of cathode earthing test, and cathode earthing test precision and cathode ground connection report can be carried out to tested deviceAlert precision is tested；
Device has the function of the two poles of the earth earthing test, and the two poles of the earth grounding function detection, the two poles of the earth ground connection resistance can be carried out to tested deviceFive groups of preset values of anti-offer, user can voluntarily set combination；
Device has voltage accuracy test function, and device is internally provided with adjustable dc voltage system, and user can set multipleVoltage test points test tested device voltage measurement accuracy；
Device has the function of voltage out-of-limit alarm test, and user changes device internal adjustable direct voltage system by settingOutput voltage can be detected tested device voltage out-of-limit alarm function (this function is tested in disconnection mode)；
Device has AC earth test function, can be verified (the Xiang Gong to tested device AC earth detection functionIt can test in disconnection mode)；
Device has balanced bridge detection function, and by this function, user can be to tested device or straight-flow system justInsulation against ground resistance, bears insulation against ground resistance, and balanced bridge size is detected；
Device have the anti-distribution capacity test function of system, user can to system plus earth impedance, cathode impedance ground,Anode distribution capacity over the ground, distribution capacity is optionally combined and is set cathode over the ground；
Device have the anti-distribution capacity test function of branch, user can to branch plus earth impedance, cathode impedance ground,Anode distribution capacity over the ground, distribution capacity is optionally combined and is set cathode over the ground；
Device has signal analysis function, for needing the equipment by the progress earthing detection that signals, can pass through thisFunction analyzes the parameters such as the signal amplitude of tested device, frequency, power；
Device can simulate the loop situations of single supply formation, after loop switch is opened, can examine tested deviceChecking feature under loop current；
Due to being used cooperatively for each intermodule so that the tester has high reliability；Due to that can carry out online or offlineVerification, can meet it is a variety of in the case of verifying work, make it have high applicability, improve the accuracy rate of verification；And wiring is steadyIt is fixed, there is warning function so that in checking procedure, connect that lead is not easily to fall off, improve security and the verification of checking procedureEfficiency.
As the further optimization of said program, the signal output part connection main control module of the accurate measurement moduleFirst signal input part, the signal input part of the signal output part connection AC power supply module of switch, the letter of AC power supply moduleThe signal input part of number output terminal connection regulated power supply module, the signal output part connection main control module of regulated power supply moduleSecondary signal input terminal, the 3rd signal input part of the signal output part connection main control module of human-computer interaction module；The masterThe signal input part of the first signal output part connection capacitance-resistance array module of control module, the signal output part of capacitance-resistance array moduleConnect the signal input part of variable resistor, the signal input of the secondary signal output terminal connection human-computer interaction module of main control moduleEnd, the signal input part of the 3rd signal output part connection alarm lamp of main control module.
By the connection matching relationship of signal between each module, it is more convenient checking procedure, fast, accurately, connection sideFormula realizes the intelligent operation of device, has saved human and material resources, has avoided substantial amounts of resource input to the operation and maintenance of deviceFace；Simultaneously the efficiency of verification is made to improve, stable connection between modules, accurate, it is chaotic to avoid occurring in checking procedure signal,Improve security.
As the further optimization of said program, removable expansion module is further included, the removable expansion module is arranged onOn the one side of shell.With removable expansion module, remaining required accessory module can be matched according to demand so that more meetVerification demand is conducive to promote measurement accuracy.
As the further optimization of said program, the capacitance-resistance array module includes electric resistance array, capacitor array and relayDevice array, one end of the first signal output part connection relay array of the main control module, the other end of relay arrayParallel resistance array and capacitor array, and pass through electric resistance array in parallel and connect variable resistor with capacitor array.Each Resistor Array ProjectorRow are in series by the different resistance of multiple resistance values, and each resistance can be by a relay by its short circuit, and main control module leads toControl relay short circuit one or more resistance therein is crossed to realize continuously adjusting for resistance；Each capacitor array is by multiple appearancesIt measures different capacitances to compose in parallel by relay, main control module is by controlling relay to put into one or more electricity thereinHold to realize continuously adjusting for capacitance；By the control of relay driver, it can be achieved that the positive and negative Ω ground resistances of 0-999K over the groundExcursion and 0-125uF ground capacities excursion, electric resistance array and capacitor array just over the ground with it is negative over the ground between it is eachTwo terminals have been drawn, have realized that system insulation verification is verified with branch insulation to facilitate.
As the further optimization of said program, the accurate measurement module includes voltage sampling unit and A/D conversions are singleMember, the signal input part of the signal output part connection A/D converting units of the voltage sampling unit, the signal of A/D converting unitsOutput terminal connects the first signal input part of main control module.Realize the sampling to voltage, A/D converting units are mainly using highThe AD Analog-digital Converter chips of speed 24, improve the efficiency of sampling and signal conversion, and then improve verification efficiency.
As the further optimization of said program, circular socket holes are axially provided in the contact slot, and it is circular slottingHole has a toroidal cavity between slot with contacting, and the circular socket holes are equipped with a gap slot.External lead wire insertion is positive and negativeWhen polar curve clamping connection mouth and earthing clamp interface, insertion end first stretches into the circular socket holes of contact slot, and that is inserted into will insert with circleGap slot matching on hole, after being inserted into circular socket holes, insertion end is located at circular socket holes with contacting the annular between slotIn cavity, by being rotatably inserted into end, insertion end is made to realize consolidating for external lead wire with deviateing gap slot at gap slot matchingIt is fixed, make its not easily to fall off.
As the further optimization of said program, the human-computer interaction module includes touch-screen and CPU, the touch-screenSignal is transferred to main control module by CPU, and main control module passes through CPU feedback signals to touch-screen simultaneously.Operating personnelBy point touching screen come arrange parameter and query result, touching signals are sent to main control module, main control by corresponding CPUTouch-screen is fed back to after resume module signal, realizes man-machine interaction, makes checking procedure and result high-visible so that more transparentChange, operation is simpler, and verification is more efficient.
The beneficial effects of the utility model are：
1st, the utility model is run using intelligent, and substantial amounts of man power and material is avoided to put into the operation and maintenance of deviceFace makes device in good working order, prolong the service life always, make its verification data more accurate.
2nd, the tester of the utility model is small, simple in structure, is convenient for carrying, and with warning function, ensure thatSecurity in checking procedure.
3rd, can be verified online or offline, applicability is high, can meet it is a variety of in the case of verifying work, improve verificationEfficiency and accuracy rate.
4th, each intermodule is used cooperatively so that the tester has high reliability；Since school can be carried out online or offlineTest, can meet it is a variety of in the case of verifying work, make it have high applicability, improve the accuracy rate of verification；And wiring is stablized,With warning function so that in checking procedure, connect the effect that lead is not easily to fall off, improves the security of checking procedure and verifiesRate.
5th, there is removable expansion module, remaining required accessory module can be matched according to demand so that more meet verificationDemand is conducive to promote measurement accuracy.
6th, contact in slot and be axially provided with circular socket holes, and circular socket holes have an annular sky between slot with contactChamber, circular socket holes are equipped with a gap slot；When external lead wire is inserted into positive and negative anodes wire clamp interface and earthing clamp interface, insertion endThe circular socket holes of contact slot are first stretched into, and that is inserted into will match with the gap slot in circular socket holes, be inserted when being inserted into circleKong Hou, insertion end are located at circular socket holes with contacting in the toroidal cavity between slot, by being rotatably inserted into end, make insertion end with slittingDeviate gap slot at mouth slot matching, realize the fixation of external lead wire, make its not easily to fall off.
7th, operating personnel can be by point touching screen come arrange parameter and query result, and corresponding CPU sends out touching signalsMain control module is sent to, touch-screen is fed back to after main control module processing signal, realizes man-machine interaction, make checking procedure and knotFruit is high-visible so that more transparence, operation is simpler, and verification is more efficient.
Description of the drawings
Fig. 1 is the structure diagram of straight-flow system seal calibration equipment described in the utility model embodiment；
Fig. 2 is the functional block diagram of straight-flow system seal calibration equipment described in the utility model embodiment；
Fig. 3 is the structure of contact slot in positive and negative anodes wire clamp interface described in the utility model embodiment or earthing clamp interfaceSchematic diagram.
Reference sign：
10- housings；101- is switched；102- alarm lamps；103- positive and negative anodes wire clamp interfaces；104- earthing clamp interfaces；105-Variable resistor；106- contacts slot；106a- circular socket holes；106b- gap slots；107- removable expansion modules；20- is adjustablePower module；30- capacitance-resistance array modules；301- electric resistance arrays；302- capacitor arrays；303- relay arrays；40- AC powersModule；50- accurate measurement modules；501- voltage sampling units；502-A/D converting units；60- human-computer interaction modules；601- is touchedTouch screen；602-CPU；70- main control modules.
Specific embodiment
The embodiment of the utility model is described in detail below in conjunction with the accompanying drawings.
Embodiment
As shown in Figure 1, a kind of straight-flow system seal calibration equipment, including housing 10, the housing 10 is equipped with moreA perforate, the perforate of housing 10 are equipped with switch 101, alarm lamp 102, positive and negative anodes wire clamp interface 103, earthing clamp interface 104With variable resistor 105, and 105 one end tandem tap 101 of variable resistor, alarm lamp 102 and positive and negative anodes wire clamp interface 103 are anotherEnd connects earthing clamp interface 104, and contact slot is equipped in the positive and negative anodes wire clamp interface 103 and earthing clamp interface 104106；Regulated power supply module 20, capacitance-resistance array module 30, AC power supply module 40, accurate measurement module are equipped in the housing 1050th, human-computer interaction module 60 and main control module 70, the regulated power supply module 20, capacitance-resistance array module 30, AC powerModule 40, accurate measurement module 50 and human-computer interaction module 60 control with main control module 70 connect respectively.
Insulation monitoring device or portable earthing searching instrument are verified by the cooperation of each module, made by effect equipmentNormal use is in the detection of straight-flow system, it is ensured that straight-flow system safe and stable operation；The utility model can be realized to off-line modeWith the verification of on-line mode, offline and online switching is realized by the opening and closing for adjusting regulated power supply module 20；Regulated power supply mouldCurrent-limiting function and short-circuit protection function built in block 20, output have a relay, when system works in on-line model, the relayDevice is off, and when system is operated in off-line mode, which is closed；Wherein：
In disconnection mode, tested device can be exited to former monitoring system, the mould that access the utility model tester providesIntend in straight-flow system, in the analog DC system, by main control module 70 to capacitance-resistance array module 30 and AC power mouldThe control of the various combination of 40 grade of block can complete the verifying work to being tested insulating detection equipment various functions；
Under in on-line model, the utility model tester can be accessed in the same system to work with tested device, at this point,Regulated power supply module 20 inside tester is in off state, and all verifying function items will carry out in former straight-flow system；
Power on, open switch 10 after i.e. into operating mode select picture, picture be present with on-line testing and fromLine tests option；
If selecting on-line testing, system will prompt test lead connecting line whether correct access system, determine testHold connecting line that can be selected under the interface into on-line testing bulleted list main menu by determination key after correctly accessingCan on-line testing various functions, may return to model selection interface by return key；
After plus earth test is selected under on-line testing item-function selects menu, i.e., into plus earth test settingInterface, in the interface, user may be selected 1-5 plus earth test point and be tested, and have √ to do before selected test pointMark, each test point can be configured by clicking on the dummy keyboard occurred on screen after the test point, test intervalAlso it is the time interval of the adjacent test point of each two, test interval can be in 5-999S for the testing time of each test pointBetween be configured, under the interface, upper level function selection picture is returned to by return key, by starting to survey after being provided withExamination button enters plus earth test interface；In plus earth test interface, one column of Impedance measurement shows to be that user choosesTest point；Current Impedance measurement：Represent current impedance ground；Time：Testing time, reach set test interval afterInto the test of next test point, after the last one test point time reaches setting value, auto-returned upper level interface；JustVoltage-to-ground：Show current anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Display is justVoltage between pole and cathode；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is disconnected or closedIt closes；Current test can be exited by test button is stopped during the test, return to upper level and interface is set；
After cathode earthing test is selected under on-line testing item-function selects menu, i.e., set into cathode earthing testInterface, test process are tested similar with plus earth；
After the two poles of the earth earthing test is selected under on-line testing item-function selects menu, i.e., set into the two poles of the earth earthing testInterface, in the interface, user may be selected 1-5 groups the two poles of the earth earthing test point and be tested, and have √ to do before selected test groupMark, each test point can be configured by clicking on the dummy keyboard occurred on screen after the test point；Carry out the two poles of the earth ground connectionDuring test, the sum of impedance ground need to be more than or equal to 10 kilo-ohms during positive and negative electrodes in same, and test interval is the test of each test groupTime is also the time interval of the adjacent test group of each two, and test interval can be configured between 5-999S；On the boundaryUnder face, upper level function selection picture is returned by return key, enters the two poles of the earth ground connection by starting to test button after being provided withTest interface；In the earthing test interface of the two poles of the earth, one column of Impedance measurement shows to be test point that user chooses；Current test resistanceIt is anti-：Represent current the two poles of the earth impedance ground；Time：Testing time reaches and test interval is set to enter next group of test afterwardsThe test of point, after last group of test point time reaches setting value, auto-returned upper level interface；Positive voltage-to-ground：DisplayCurrent anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Between display positive electrode and negative electrodeVoltage；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is opened or closed；In test processIn can exit current test by test button is stopped, returning to upper level and interface be set；
After voltage accuracy test is selected under on-line testing item-function selects menu, i.e., into voltage accuracy test promptsInterface, the voltage accuracy test under on-line mode can only test current system voltage value, if you need to the precision of more electrical voltage points intoRow test, need to be tested in disconnection mode, pressed and started to enter test interface after test；Under the interface, display is justVoltage-to-ground, negative voltage between voltage-to-ground and system positive and negative anodes, are carried out by above-mentioned voltage measuring value and tested deviceComparison, judges whether its voltage measurement accuracy conforms to requirement, can stop current test by feeler switch is stopped in test process, returnUpper level interface；
After balanced bridge detection is selected under on-line testing item-function selects menu, i.e., detect and prompt into balanced bridgeInterface, the detection of balanced bridge can provide the accurate information of system balancing bridge for operation maintenance personnel, during the test, reallyDetermining equipment under test will not be to system Injection Signal；It presses after starting test, waits 1-2 minutes, it will test result picture occurFace, after test is completed, which will calculate the positive earth impedance of system under test (SUT), bear earth impedance and system balancingAfter detection is completed, upper level prompting interface can be returned by return key for bridge size；
After the anti-distribution capacity test of system is selected under on-line testing item-function selects menu, i.e., into the anti-distribution of systemCapacity measurement parameter setting interface, under the setting interface, user can be to system plus earth resistance, system cathode ground connection electricityResistance, the positive direct-to-ground capacitance of system, system bears direct-to-ground capacitance and is combined setting, with √ as mark before the test condition chosen,The resistance value or capacitance of each test condition can be set, and the testing time can be set between 5-999S；Parameter is setAfter putting completion, enter the anti-distribution capacity test interface of system by feeler switch is started, which goes out current system test pointCloth capacitance and test resistance resistance value, after the testing time that the testing time reaches setting, an interface on auto-returned, test processIn, it also can stop current test by feeler switch is stopped, returning to upper level and menu is set；
The anti-distribution capacity test of branch is similar in interface display in parameter setting to the anti-distribution capacity of system, specific to testProcess is referred to the anti-distribution capacity test of system；
It is selected in on-line testing item-function under menu after selection signal integration test, i.e. entering signal integration test parameterInterface is set, in signal synthesis test setting interface, can be connect with the condition of selection signal analysis, i.e. plus earth or cathodeGround, and the big I of grounding resistance is set, the testing time can be set；When setting, positive ground resistance and negative ground connection electricityResistance can only select one of which to be tested, after being provided with, by test entering signal integration test interface is started, on the boundaryIn face, it can show the parameters such as equipment under test wavy curve, signal amplitude, signal power, can be pressed in test process by test is stoppedKey stops current test, returns to upper level and sets interface；
If selection off-line test, i.e., picture is selected into voltage class, tester tested is set what is selected according to userStandby voltage class controls suitable DC output voltage, and voltage class selection mistake will likely cause the damage of equipment under test,Tester provides four voltage class and is selected for user altogether, after the voltage class for determining equipment under test, enters by determination keyOff-line test bulleted list main menu, in off-line test project, plus earth test, cathode earthing test, the two poles of the earth ground measuringExamination, balanced bridge detection, the test of system anti-distribution capacity, the anti-distribution capacity test of branch and signal synthesis test function item withLine is the same when testing, and the voltage function test in off-line test is illustrated with AC earth test below：
Voltage function test item can verify the voltage measurement accuracy of equipment under test with voltage out-of-limit function；OfflineAfter selecting voltage function test under test event function selection menu, i.e., interface is set into voltage function test parameter, at thisIn interface, user may be selected 1-5 voltage test points and be tested, and have √ to make marks before selected test point, each to testPoint can be configured by clicking on the dummy keyboard occurred on screen after the test point, and test interval is each test pointTesting time is also the time interval of the adjacent test point of each two, and test interval can be configured between 5-999S；Under the interface, upper level function selection picture is returned by return key, enters voltage by starting to test button after being provided withFunctional test interface；In voltage function test interface, one column of test voltage point shows to be test point that user chooses；CurrentlyTest voltage：Represent current test voltage point；Time：Testing time reaches and sets test interval afterwards into nextThe test of test point, after the last one test point time reaches setting value, auto-returned upper level interface；Positive voltage-to-ground：Show current anode voltage-to-ground；Negative voltage-to-ground：Show current cathode voltage-to-ground；System voltage：Show positive electrode and negative electrodeBetween voltage；1 state of contact：Display contact 1 is opened or closed；2 state of contact：Display contact 2 is opened or closed；It is testingCurrent test can be exited by test button is stopped in the process, return to upper level and interface is set；
AC earth test item will apply an AC signal on DC power supply, to the AC earth function of equipment under test intoRow effect；
After AC earth test is selected under off-line test item-function selects menu, i.e., into AC earth test parameterInterface is set, and in the interface, AC ground voltage grade and AC earth polarity, AC ground voltage grade may be selected in userOne of which can be only selected with AC earth polarity；After parameter setting is completed, AC earth effect is carried out by feeler switch is startedIt tests, the poles such as current system AC ground voltage and polarity of ground and contact 1 and 2 state of contact, test process is shown in the interfaceIn can stop current test by feeler switch is stopped, returning to upper level and interface be set；
By above online or off-line test, make the straight-flow system seal calibration equipment of the utility model with followingFunction：
Insulation monitoring device or portable earthing searching instrument can be verified online or offline；
Device has plus earth test function, can carry out plus earth measuring accuracy and plus earth report to tested deviceAlert precision is tested；
Device has the function of cathode earthing test, and cathode earthing test precision and cathode ground connection report can be carried out to tested deviceAlert precision is tested；
Device has the function of the two poles of the earth earthing test, and the two poles of the earth grounding function detection, the two poles of the earth ground connection resistance can be carried out to tested deviceFive groups of preset values of anti-offer, user can voluntarily set combination；
Device has voltage accuracy test function, and device is internally provided with adjustable dc voltage system, and user can set multipleVoltage test points test tested device voltage measurement accuracy；
Device has the function of voltage out-of-limit alarm test, and user changes device internal adjustable direct voltage system by settingOutput voltage can be detected tested device voltage out-of-limit alarm function (this function is tested in disconnection mode)；
Device has AC earth test function, can be verified (the Xiang Gong to tested device AC earth detection functionIt can test in disconnection mode)；
Device has balanced bridge detection function, and by this function, user can be to tested device or straight-flow system justInsulation against ground resistance, bears insulation against ground resistance, and balanced bridge size is detected；
Device have the anti-distribution capacity test function of system, user can to system plus earth impedance, cathode impedance ground,Anode distribution capacity over the ground, distribution capacity is optionally combined and is set cathode over the ground；
Device have the anti-distribution capacity test function of branch, user can to branch plus earth impedance, cathode impedance ground,Anode distribution capacity over the ground, distribution capacity is optionally combined and is set cathode over the ground；
Device has signal analysis function, for needing the equipment by the progress earthing detection that signals, can pass through thisFunction analyzes the parameters such as the signal amplitude of tested device, frequency, power；
Device can simulate the loop situations of single supply formation, after loop switch is opened, can examine tested deviceChecking feature under loop current；
Due to being used cooperatively for each intermodule so that the tester has high reliability；Due to that can carry out online or offlineVerification, can meet it is a variety of in the case of verifying work, make it have high applicability, improve the accuracy rate of verification；And wiring is steadyIt is fixed, there is warning function so that in checking procedure, connect that lead is not easily to fall off, improve security and the verification of checking procedureEfficiency.
In one of the embodiments, as shown in Fig. 2, the signal output part connection main control of the accurate measurement module 50First signal input part of module 70 switchs the signal input part of 101 signal output part connection AC power supply module 40, exchangeThe signal input part of the signal output part connection regulated power supply module 20 of power module 40, the signal output of regulated power supply module 20The secondary signal input terminal of end connection main control module 70, the signal output part connection main control module 70 of human-computer interaction module 60The 3rd signal input part；The signal input of the first signal output part connection capacitance-resistance array module 30 of the main control module 70End, the signal input part of the signal output part connection variable resistor 105 of capacitance-resistance array module 30, the second letter of main control module 70The signal input part of number output terminal connection human-computer interaction module 60, the 3rd signal output part connection alarm lamp of main control module 70102 signal input part.
By the connection matching relationship of signal between each module, it is more convenient checking procedure, fast, accurately, connection sideFormula realizes the intelligent operation of device, has saved human and material resources, has avoided substantial amounts of resource input to the operation and maintenance of deviceFace；Simultaneously the efficiency of verification is made to improve, stable connection between modules, accurate, it is chaotic to avoid occurring in checking procedure signal,Improve security.
In another embodiment, as shown in Figure 1, further including removable expansion module 107, the removable expansion module107 are arranged on the one side of shell 10.With removable expansion module 107, remaining required attachment mould can be matched according to demandBlock so that more meet verification demand, be conducive to promote measurement accuracy.
In another embodiment, as shown in Fig. 2, the capacitance-resistance array module 30 includes electric resistance array 301, capacitor array302 and relay array 303, one end of the first signal output part connection relay array 303 of the main control module 70, afterThe other end parallel resistance array 301 and capacitor array 302 of electric appliance array 303, and pass through electric resistance array 301 and capacitance in parallelArray 302 connects variable resistor 105.Each electric resistance array 301 is in series by the different resistance of multiple resistance values, and each resistance is equalCan be by a relay by its short circuit, main control module 70 is by controlling relay short circuit one or more resistance therein come realExisting resistance continuously adjusts；Each capacitor array 302 is composed in parallel by the different capacitance of multiple capacity by relay, main controlModule 70 realizes continuously adjusting for capacitance by the way that relay is controlled to put into one or more capacitance therein；It is driven by relayThe control of dynamic device is, it can be achieved that the excursion of the positive and negative Ω ground resistances of 0-999K over the ground and the variation model of 0-125uF ground capacitiesIt encloses, electric resistance array 301 and capacitor array 302 realize system just over the ground with respectively having drawn two terminals between bearing over the ground to facilitateInsulating check of uniting is verified with branch insulation.
In another embodiment, as shown in Fig. 2, the accurate measurement module 50 includes voltage sampling unit 501 and A/DConverting unit 502, the signal input part of the signal output part connection A/D converting units 502 of the voltage sampling unit 501, A/DFirst signal input part of the signal output part connection main control module 70 of converting unit 502.Realize the sampling to voltage, A/DConverting unit 502 is mainly the AD Analog-digital Converter chips using 24 at a high speed, improves the efficiency of sampling and signal conversion,And then improve verification efficiency.
In another embodiment, as shown in figure 3, being axially provided with circular socket holes 106a in the contact slot 106, andCircular socket holes 106a has a toroidal cavity between slot 106 with contacting, and the circular socket holes 106a is equipped with a gap slot106b.When external lead wire insertion positive and negative anodes wire clamp interface 103 and earthing clamp interface 104, insertion end first stretches into contact slot 106Circular socket holes 106a, and that is inserted into will match with the gap slot 106b on circular socket holes 106a, when being inserted into circular socket holesAfter 106a, insertion end is located at circular socket holes 106a with contacting in the toroidal cavity between slot 106, by being rotatably inserted into end, makesInsertion end realizes the fixation of external lead wire, makes its not easily to fall off with deviateing gap slot 106b at gap slot 106b matchings.
In another embodiment, as shown in Fig. 2, the human-computer interaction module 60 includes touch-screen 601 and CPU602, instituteIt states 601 signal of touch-screen and main control module 70 is transferred to by CPU602, and main control module 70 is fed back simultaneously by CPU602Signal is to touch-screen 601.For operating personnel by point touching screen 601 come arrange parameter and query result, corresponding CPU602 willTouching signals are sent to main control module 70, and main control module 70 feeds back to touch-screen 601 after handling signal, realizes man-machine friendshipMutually, make checking procedure and result high-visible so that more transparence, operation is simpler, and verification is more efficient.
Embodiment described above only expresses specific embodiment of the present utility model, and description is more specific and detailed,But it should not be interpreted as limiting the scope of the present invention.It should be pointed out that for the common of this fieldFor technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong toIn the scope of protection of the utility model.