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CHAPTER 12

INSULATION RESISTANCE MEASUREMENT FOR

VARIOUS EQUIPMENTS

Insulation resistance is measured while manufacturing various equipments like

transformer, circuit breakers, cables etc. It should be noted that the negative measurement
lead should not be connected to large ground conductors. Following are the connections
schemes for insulation resistance measurement for different equipments:

12.1

TRANSFORMERS:

HV winding (with 3 phases HV winding (with 3 phases

LV winding (with 3

short) to LV winding (with

3 phases short)

short) to ground with LV

winding guarded

phases short) to ground

with HV winding guarded

HV winding (with 3 phases short)

to LV winding (with 3 phases

Positive terminal of insulation
tester

Negative terminal of insulation
tester

Guard terminal of insulation
tester

G

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Содержание ISO-5

Страница 1: ...Operating Manual ISO 5 5 kV Digital Insulation Tester ISO 10 10 kV Digital Insulation Tester...

Страница 2: ...2...

Страница 3: ...HAPTER 5 MEASUREMENT MODES OF THE METER 13 5 1 IR Mode 13 5 2 DAR Mode 15 5 3 PI Mode 18 5 4 Step Mode 21 5 5 Ramp Mode 25 5 6 Dielectric Discharge Mode 28 5 7 Voltage Mode 32 CHAPTER 6 GRAPH WINDOW 3...

Страница 4: ...7 Other Settings 45 CHAPTER 10 METER SPECIFICATIONS 47 CHAPTER 11 51 11 1 Battery charging process 51 11 2 Battery alarms 51 CHAPTER 12 52 12 1 TRANSFORMERS 52 12 2 CIRCUIT BREAKERS 53 12 3 CABLES 53...

Страница 5: ...such as moisture and insulation deterioration Dielectric Absorption Ratio DAR measurement is a diagnostic test similar to the Polarization Index PI but DAR takes the ratio of the Insulation Resistanc...

Страница 6: ...nitoring software for window system and an interactive mobile application for android File Explorer It has le explorer to view the datalog le on TFT display Audio Read Out Audible test result on compl...

Страница 7: ...ditional safety devices and not a substitute for the general practices Insulation testing in wet conditions can be hazardous It is recommended that the instrument should not be used under these circum...

Страница 8: ...ime of the lithium ion battery SYMBOLS ON THE INSTRUMENT Caution Please refer user manual Caution Risk of electrical shock Equipment complies with current EU directives Equipment protected throughout...

Страница 9: ...NDS AND THEIR MEANING 1 Negative terminal 2 Guard G terminal 3 Positive terminal 4 LED indicating presence of mains 5 USB slot for device connection 4 6 Speaker 7 Protective cover 2 8 TFT touch screen...

Страница 10: ...Mains connected Breakdown mode Guard fuse blown Battery charging Burn mode USB mode Bluetooth mode Pre alarm for battery charging Danger High Voltage at leads Speaker mute Speaker unmute Current limi...

Страница 11: ...and positive and double probe which is connected to the negative terminal Both the handles have a rotor for locking the probe to the meter Probe rotor Single probe handle Double probe handle NOTE Ins...

Страница 12: ...ow so that the probe gets locked to the meter NOTE Do not disconnect the test leads of the meter till the test has been completed and the DUT has been discharged as the leads can cause electrical haza...

Страница 13: ...the IR mode press icon on the home screen The main measurement screen will appear To setup the basic settings of the mode press the icon The control window will appear as shown below Here you can set...

Страница 14: ...ter setting up all the basic settings press the button to go back to the main measurement screen All these control settings are stored by the meter so that the next time you start the meter you do not...

Страница 15: ...3 SET VOLTAGE DAR INFORMATION PI INFORMATION You can save the data of this test by pressing the button After pressing this button a message will appear to tell you about the le number You can press t...

Страница 16: ...s in good condition and DAR of greater than 1 4 indicates that the insulation is in an excellent condition The steps to take a test in DAR mode are as follows To enter the DAR mode press the icon on t...

Страница 17: ...and t2 both can be set in the control window with the help of their corresponding arrows The up arrow will increase the time and the down arrow will decrease the time After setting up all the basic se...

Страница 18: ...SET VOLTAGE DAR INFORMATION PI INFORMATION You can save the data of this test by pressing the button After pressing this button a message will appear to tell you about the le number You can press the...

Страница 19: ...condition and PI of greater than 4 indicates that the insulation is in an excellent condition The steps to take a test in PI mode are as follows To enter the PI mode press the icon on the home screen...

Страница 20: ...and t2 both can be set in the control window with the help of their corresponding arrows The up arrow will increase the time and the down arrow will decrease the time After setting up all the basic se...

Страница 21: ...TION You can save the data of this test by pressing the button After pressing this button a message will appear to tell you about the le number You can press the OK button on the message box in order...

Страница 22: ...voltage is increased by V 5 volts So in the last interval the test voltage will become V volts The value at the end of each interval is stored by the meter The steps to take a test in STEP mode are a...

Страница 23: ...next time you start the meter you do not need to do these settings again Then connect the test leads to the equipment whose Insulation Resistance has to be measured On the measurement screen press and...

Страница 24: ...T RESISTANCE AT EACH STEP SCREEN 2 VOLTAGE DURING TEST SCREEN 3 SET VOLTAGE VOLTAGE AT EACH STEP CURRENT AT EACH STEP Please note that in step mode if the meter is running on battery supply the meter...

Страница 25: ...short circuit current limit which can be set in the settings window It will be discussed in detail in the further chapters The test time in this test is determined by the nal voltage and the slope Ex...

Страница 26: ...to do these settings again Then connect the test leads to the equipment whose Insulation Resistance has to be measured On the measurement screen press and hold the button for about 3 seconds and then...

Страница 27: ...T SCREEN 3 SET VOLTAGE SLOPE You can save the data of this test by pressing the button After pressing this button a message will appear to tell you about the le number You can press the OK button on t...

Страница 28: ...for full absorption to take place in an insulation material The discharge timer t2 defaults to 1 minute Timer settings t1 and t2 are adjustable On completion of the test the instrument uses the curre...

Страница 29: ...ntrol window will appear as shown below Here you can set the voltage using the voltage up and down in steps of 10V below 1000V and in steps of 25V above 1000V There is also a standard voltage button t...

Страница 30: ...connect the test leads to the equipment whose Insulation Resistance has to be measured On the measurement screen press and hold the button for about 3 seconds and then release it to start the test Th...

Страница 31: ...age box in order to go back to the measurement screen Please note that if in any test the test current reaches beyond 1 mA the meter will take a response time of about 10 min to display accurate readi...

Страница 32: ...utton on the home screen of the meter The following screen will be displayed Additionally the meter also displays the voltage at the test leads DUT in other modes IR DAR PI STEP and RAMP before the st...

Страница 33: ...h data point Test duration Duration between 2 data points Sample rate 5min 1 sec data point 5 min 01 sec 10 min 2 sec data point 10 min 01 sec 15 min 3 sec data point 15 min 01 sec 20 min 4 sec data p...

Страница 34: ...lation resistance vs time for a given DUT On the home screen go to your desired test mode IR DAR PI STEP or RAMP using their corresponding button After this run the test as per the instructions given...

Страница 35: ...w you can press the button Along with the data of the test the graph of the test is also stored when you save the le The saved graph can be viewed in the le explorer Also you can view the graph while...

Страница 36: ...s from the meter To enter the le explorer and to read the data in your desired les you have to follow the following steps On the home screen enter any mode using their respective icon IR DAR PI STEP o...

Страница 37: ...sing the scrolling arrows You can also view the graph for the test by pressing the button In case the memory gets fully occupied you can delete individual les by going to the le and pressing the butto...

Страница 38: ...r the test has been completed In the PI mode it will read out the Polarization Index PI and in the DAR mode it will read out the Dielectric Absorption Ratio DAR after the test is completed This featur...

Страница 39: ...ings window Please note that all the settings in this window except date time mute unmute and bluetooth usb get reset to their default values once the meter is restarted The settings window is as show...

Страница 40: ...een will appear Here you can change the sleep time by pressing on the minutes button and a keyboard will appear where you have to enter the minutes and press button The sleep mode can also be turned O...

Страница 41: ...n Settings Along with the parameters the meter also stores customer information in the le in which the customer can write the test speci c data like customer ID and name This can also be set in the se...

Страница 42: ...yboard will appear where you have to enter the customer ID name and then press the key 9 4 Brightness Settings You can also change the brightness of the screen as per your requirement There are three...

Страница 43: ...ng button And you can change the breakdown burn setting by clicking on the icon in the bottom left corner which indicates the present breakdown burn setting Difference between breakdown mode and burn...

Страница 44: ...displayed which is High voltage shorted to guard or breakdown This is displayed when the voltage doesn t reach the desired value and the current is below 1 mA This is generally displayed when the use...

Страница 45: ...e limit by pressing on the go no go voltage button and entering the desired value on the keyboard and then pressing the button You can also turn on off go no go by clicking on off button shown in the...

Страница 46: ...reads out the insulation resistance values and other parameters like Polarization index PI and Dielectric Absorption Ratio DAR with the help of powerful speaker This feature can be turned on off by p...

Страница 47: ...5 1D 10 G 20 1D 250 V 50 G 5 1D 500 G 20 1D 500 V 100 G 5 1D 1 T 20 1D 1000 V 200 G 5 1D 2 T 20 1D 2500 V 500 G 5 1D 5 T 20 1D 5000 V 1 T 5 1D 10 T 20 1D 10 000 V only ISO 10 2 T 5 1D 20 T 20 1D Volta...

Страница 48: ...48 Insulation Leakage Current Measurement 0 01nA to 6mA Accuracy 5 0 2 nA Test voltage Accuracy 7 0 10 V nominal test voltage...

Страница 49: ...pplicable Standards Standard Norms IEC 61010 1 Safety regulations for electrical measurement control regulation and lab devices IEC 61557 Measuring and monitoring facilities for testing the electrical...

Страница 50: ...4 3 3 V m Electrical Safety Over voltage category 600 V CAT IV Test voltage 7 4 KV AC Pollution degree 2 Dimensions L X B X H 360mm x 310mm x 195mm Weight Approx 5 kg Accessories a Standard scope of...

Страница 51: ...cord symbol will appear on the task bar as shown below Also the battery charging symbol will appear Power Cord symbol Charging symbol If the meter battery has completely discharged it will take about...

Страница 52: ...Following are the connections schemes for insulation resistance measurement for different equipments 12 1 TRANSFORMERS HV winding with 3 phases HV winding with 3 phases LV winding with 3 short to LV...

Страница 53: ...with guard to body Positive terminal of insulation tester Negative terminal of insulation tester G Guard terminal of insulation tester 12 3 CABLES Positive terminal of insulation tester Negative term...

Страница 54: ...ation tester Negative terminal of insulation tester G Guard terminal of insulation tester Primary to ground with body of the CT connected to guard Positive terminal of insulation tester Negative termi...

Страница 55: ...ttings and turn on the USB by touching on the USB bluetooth When the icon will have icon of USB it means USB has been selected Then go back to home screen of the meter and then connect the USB cord re...

Страница 56: ...installed device as shown below Then install the software which can be downloaded from the website Then select the COM port in the software and press the connect button Then message will be displayed...

Страница 57: ...s On the meter go to Settings More Settings and turn on the bluetooth by touching on the USB bluetooth When the icon will have icon of bluetooth it means bluetooth has been selected Then go back to ho...

Страница 58: ...55 Then click on 5Dx_xxxxxxxxx where xxxxxxxxx is serial number and then press next button The computer will pair with the device and the following screen will appear Click on the close button...

Страница 59: ...the driver is installed and then driver installed message will appear Now again right click on the bluetooth icon and click on show bluetooth device Then right click on 5Dx_xxxxxxxxx and click proper...

Страница 60: ...all the software which can be downloaded from the website Then select the COM port in the software and press the connect button Then press ok button as shown below and the device will be connected to...

Страница 61: ...and turn on the bluetooth by touching on the USB bluetooth When the icon will have icon of bluetooth it means bluetooth has been selected Then go back to home screen of the meter Install the mobile a...

Страница 62: ...59 Then press the button shown in the gure Then in the drop down menu press the connect button Then the following screen will be displayed and the meter is now connected to your phone...

Страница 63: ...60...

Страница 64: ...61...

Страница 65: ...62 https www uniks it info uniks it...

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