HZJY-10K 10KV Insulation Resistance Tester

HZJY-10K Insulation ?Resistance TesterInstructionHuazheng Electric Manufacturing(Baoding) Co.Ltd Contents I Main Features............................................................................................3II Main Technical Performance...................................................................3III Function ?..................................................................................................4IV Notes ?......................................................................................................4V Operation Method....................................................................................4VI.Influence ?Factor......................................................................................9VII.Company Profile....................................................................................11HZJY-10K ?Insulation Resistance Tester dedicated to the measurement of water-cooled ?generator test, but also can be used for laboratory or field testing. The output ?current is greater than 5mA. The maximum output voltage is 10KV. It includes ?high-precision micro-current measurement system and digital boost system, which ?uses a high-voltage line and a signal line connecting with the test product. The ?results from the large screen liquid crystal display and store the results with ?automatic measurement.?Main Features1. ?32-bit micro-controller, English interface, easy to operate.Automatically ?calculates the absorption ratio and the polarization ?
index, and automatically save 15 seconds, 1 ?minute, 2 minutes,10 ?minutes to facilitate analysis of data per minute.3. ?Output current and short-circuit current are greater than 5mA.Anti-interference ability, which meets the ?EHV substation on-site ?
operation.With a fully enclosed high-voltage generator module technology,and
the protection of the internal resistance is safe ?and reliable.
Automatic ?discharge after testing and real-time monitoring the ?
discharge process.? Main Technical PerformanceAccuracy: ?± 10%Range: ?0.1M ~ 400GOTest Voltage: 0.5KV,1KV,2.5KV,5KV,10KVShort Circuit Current:?5mAMeasuring Time: ?1 minute to 10 minutes (related to the measurement )Power ?Supply: 180 ~ 270VAC, 50Hz/60Hz ± 1% Working Environment: -10~40? Humidity:20~80%.? Function1. (L) ? " L" ? for the high-voltage output,2. (G) ?“G” connected to the shielding ?ring3. (E) ? ?Connected ?to GND.? NotesPlease ?pay attention to safety, “L”is the high voltage side, “E”is GND (Must Connect ?to The Earth) ?1G = 1000MV. Operation MethodEnter ?The Initial Setup Screen (Figure I)The ?initial measurement of the icon is selected, the following shows 2500v measure ?voltage.(1) ?Press increase or decrease to adjust the voltage(2) ?Press ? key to change the selected part(test date save set)(3) ?Press the start / stop button for 1 second to start the measurement,Display ?Measurement of The Screen (Figure II)2500V ? ?testing voltage105 M ? ?instantaneous value02'45 " ? time of the measurement ?process05-05-24 measurement date15 " ? ? ?the value of testing ?15 seconds01 ' ? ? the value of testing 1 minute10 ' ? ? the value of testing 10 ?minutesDAR ? ? ?absorption ratio ? ?DAR = ?R60s/R15sPI ? ? ? polarization ratio ?PI = R10m/R60sPress ?start / stop button at the end of testing,showingDisplay ?Discharge Screen (Figure III)600V ? ? ? ?600V is the transient voltage discharge process.
Do not touch the sample and the ?product line at the same time.
After testing,suggesting user manual discharge of specimen.After ?discharge,it enters into results of the measurementDisplay the Saved Screen (Figure D) ??? ?Right half of the screen as part of the data and measurements, please ?refer to display the measurement screen (Figure II)
[007]: ?stored number of the measurement dataPress ? key to quit the selected part.Press start / stop button to return to ?the initial setup screen (Figure I)Press the ? key to move the selected ?bit, ? ? key ?to modify the serial number.2. ?When the clock icon is selected.(1) ?Press he start / stop button to enter the time display and setting screen ?(Figure E):(2) ?QUIT is selected out by start / stop button to return to the initial setup ?screen (Figure I)SET ?is selected by start / stop button in the date, time, a small arrow appears ?below ? ? key to change the date at the time.(4) ?Amend complete, press the start / stop button setting is selected.(5) ?Press the ? key allows setting and exit the loop is selected. In the ?modification date and time when the cycle moves small arrow3. ?When the store icon is selected(1) ?The start / stop button to store the data into the view screen (Figure VI)(2) The right half of the screen ?as part of the data and measurements, please refer to display the measurement ?screen (Figure II) shows(3) [000] to [007] that serial ?measurements(4) Press the ? ? keys to [000] to ?[007] is selected on the right shows the number of data(5) Press the start / stop button ?to return to the initial setup screen (Figure I)4. ?When the Settings icon is selected(1) ?The start / stop button, enter the setup screen (Figure VII)(2) ?Press the ? key to make the TIME ALARM etc loop ?is selected.(3) ?Press the ? ? keys to change the appropriate settings(4) ?Press the start / stop button to return to the initial setup screen (Figure I)5. ?Structure6.FunctionLCD ?Keypad: Responsible for the keyboard and display.NC Regulator: ?PWM circuit producing high-efficiency standards for 0-5V output. DC-DC ?0-10Kv: with step-up transformer, high conversion, high voltage DC output 10kv,short ?circuit protectionDivider Circuit: ?10KV high pressure, converted to 5V, to facilitate AD collection.Measuring Circuit: ?for data acquisition, current transformation.Controller: ?will all of these modules to complete the measurement.VI.Influence ?Factora. Temperature ?and HumidityGeneral ?resistance of the material with the increase of temperature and humidity ?decreases. In contrast, the surface resistance (rate) is sensitive to ?environmental humidity, and body resistance (rate) is more sensitive to ?temperature. When the humidity increases and the surface leakage increases, the ?body will increase the conduction current. Temperature, the movement of the ?carrier rate is accelerated dielectric absorption current and conduction ?current will increase accordingly, according to the information reported, the general ?media in the 70C 20C when the resistance is only 10% of the time. Therefore, ?the measurement of resistance of the material, you must specify the sample to ?reach equilibrium with the environment temperature and hb. Test Voltage ?(Electric Field Strength)Dielectric resistance ?(rate) values are generally not in a wide voltage range remain unchanged, that ?this does not apply Ohm's law. Room temperature, at a lower voltage range, the ?conduction current with the applied voltage increases linearly added, the ?resistance value remains unchanged. After more than a certain voltage, the ion ?of motion increases and the increase in conduction current increases faster ?than the test voltage, the resistance of the material is decreased rapidly. ?Thus, the higher the test voltage applied, the lower the resistance of the ?material, resulting in different voltage resistance test in the material may ?have a greater difference.
It is ?noteworthy, resulting in material changes in the determinants of resistance is ?the test of the electric field strength, rather than the test voltage. On the ?same test voltage, if the distance between the electrodes of different tests on ?the test results of resistivity will be different, the smaller the distance ?between positive and negative electrodes, the test value is smaller.c. Test TimeDC voltage with a certain ?pressure on the material being tested, the test materials to stabilize the ?current value is not instantaneous, but there is a decay process. The pressure ?at the same time, charging current flows through the larger, then more time to ?slowly decrease the absorption of current, the conductance of the last to ?achieve more stable current. The higher the measured resistance value, time to ?reach equilibrium is longer. Therefore, the measurement in order to properly ?read the test resistance, should be read in the stable value or to take ?pressure readings after 1 Minute.In addition, high ?insulation resistance value is also related to its charged history. For ?accurate evaluation of electrostatic properties of materials, materials in the ?resistance (rate) test, should first deal with its power consumption, and ?standing some time, the standing time desirable for 5 minutes, and then, and ?then measure the program testing. In general, a material testing, at least 3 to ?5 randomly selected samples were tested, with its average value as the test ?results.d. Leak Test EquipmentIn the test, the ?circuit connection is not high insulation resistance, often inappropriately ?sample being tested, such as parallel sampling resistor, the measured results ?may bring a greater impact. To do this:
To reduce ?measurement error protection technology should be used in the leakage current ?of the circuit protective conductor installed to basically eliminate stray ?current effects on the test results;
High-voltage ?lines due to surface ionization, some leakage to ground, so try to use high ?insulation, large diameter high-voltage wire as the high voltage output cable ?and the connection as short as possible to reduce the tip, to prevent corona ?discharge;
Polyethylene, ?Teflon and other insulating materials test bed and support the body in order to ?avoid the causes of such tests was lower.e. Outside InterferenceInsulating material with high DC voltage, current ?through the sample is very small, vulnerable to the impact of outside ?interference, resulting in a larger test error. Thermoelectric potential, ?contact potential is generally small and can be neglected; electrolytic ?potential is mainly wet specimens produced with different metal contacts, only ?about 20mV, and indeed the static tests require relatively low humidity, when ?tested in a dry environment, you can eliminate potential electrolysis. ?Therefore, outside interference is mainly the coupling of stray current or ?potential generated by electrostatic induction.In the test current is less than 10-10A or measuring ?more than 1011 ohms resistance; being tested samples, the test electrode and ?the test system should adopt strict screening measures to eliminate the impact ?of outside interference
Company ?ProfileCompany ?Name : Hebei Huanhai Import & Export Trading Co., LtdAdd : Room 510 Chaoyanglongzuo B Building No.1178Chaoyang street, Baoding, Hebei,ChinaTel : 0086-312-3372757
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