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IDA 200 Insulation Diagnostics System
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1. 0 01 0 1 i ig 100 1000 Here an example of how moisture affects the dissipation factor of Kraft paper at 20 C is plotted Diagnosis of insulation in power transformers The insulation system of most power transformers consists of oil and cellulose Both these materials change their dielectric properties over the transformers life span When measured at a fixed frequency only the property changes in the different materials cannot be discerned An analysis of the measured dissipation factor frequency characteristic allows for a more complete diagnostics of the examined insulation The graph below shows the result of measure ments done with IDA 200 on the insulation between primary and secondary to tertiary windings on an auto power transformer At higher frequencies the pressboard and the oil volume determine the dielectric loss at medium frequencies the oil conductivity is the dominant factor and the lower frequency range is dominated by the pressboard dielectric loss From analysis of the measurement results using IDA 200 MODS software a moisture content of 1 1 5 was deduced Normally moisture content above 3 5 4 should result in a replacement of the transformer to avoid insulation breakdown 400 kV F421 kY 10 kY windings 000i 0 04 o 1 1 10 100 1000 Frequency Hz Measurement results of the insulation between primary and secondary to tertiary windings on a power transformer Diagnosis of cellul
2. IDA 200 Insulation Diagnostic System for use together with the HVU Art No CK 19092 For mains voltage 115 230 V AC switch selectable Complete with IDA 200 instrument IDA 200 instrument software IDA 200 MODS software Transport case Art No GD 00270 User s manual Mains supply cable Keyboard with integrated mouse Calibration box Art No CK 90010 Termination box IDA 200 Art No CK 90030 Multi cable blue 1x15 m 49 ft Art No GA 00615 Test capacitor box Art No CK 90050 Ground cable with alligator clip 1 x 10 m 32 8 ft Art No GA O0208 IDA 200 HVU GE Energy Services IDA 200 can be operated while it is in the transport case Programma Products IDA 200 POWER o POWER READY INTERFACE ETHERNET i 1 Femperey Hr Compie C E PF ln Dete ercere eft re Mains switch indicator Ethernet Interface USB port Computer screen for integrated PC Terminal for connecting optional external voltage amplifier Measuring status indicator Terminal for connecting sample to be diagnosed Voltage output measuring input Output On Off buttons Floppy Disk Drive 1 44 MB oo0000000 86 GE Energy Services Programma Products Calibration box Multi cable Termination box Test capacitor box and ground cable GE Energy Services Programma Products IDA 200
3. IDA 200 IDA 200 Insulation Diagnostics System Consequently GE Energy Services is now able to present the Insulation Diagnostics System IDA 200 The measure ment and analysis methods employed in IDA 200 are based on research carried out at the Royal Institute of Technology in Stockholm with resources and input from major users and manufacturers of HV equipment These methods together with the design and selection of components have resulted in a unique diagnostics system In regards to size and weight as well as to accuracy and depth of analysis IDA 200 is definitely in a class of its own With IDA 200 it is possible to diagnose insulation material in most objects in a high voltage installation e g power transformers measuring transformers bushings paper insulated cables etc The diagnostic measurement is done by applying a relatively low voltage up to 140 V IDA 200 measures the capacitance and dielectric losses at discrete frequencies both above and below mains frequency By avoiding the mains frequency and its harmonics an efficient filtering of their corruptive effects is enabled GE Energy Services Programma Products APPLICATION IDA 200 is designed for diagnostic measurements of electrical insulation Examples of application areas Power and instrument transformers Bushings and Paper insulated cables Electrical insulation come in all three states of matter solid such as cellulosic paper and porcelain liq
4. RS232 Parallel port Analog video port SVGA Environmental conditions Operating temperature 20 C to 55 C 4 F to 131 F Storage temperature 40 C to 70 C 40 F to 158 F Humidity lt 95 RH Non condensing 30 days year 85 RH remaining time LVD 73 23 EEC EN 61 010 1 Section 6 EN 61 010 1 A2 EMC 89 336 EEC Emission EN 50 081 2 EN 55 011 Immunity EN 61 000 6 2 EN 61 000 4 2 EN 61 000 4 3 EN 61 000 4 4 EN 61 000 4 5 EN 61 000 4 6 ENV 50 140 ENV 50 141 ENV 50 204 Mechanics EN 60 068 2 31 EN 60 068 2 32 Other Mains voltage 115 230 V AC switch selectable 10 50 60 Hz Power Consumption Max 250 VA Dimensions 450 x 160 x 410 mm 17 7 x 6 3 x 16 1 Weight 15 kg 33 Ibs instrument only 30 kg 66 Ibs with accessories and transport case The above specifications are valid at nominal input voltage and an ambient temperature of 25 C 77 F Specifications are subject to change without notice OPTIONAL ACCESSORIES IDA 200 HVU The High Voltage Unit HVU is used with the IDA 200 system to increase the output voltage up to 30 kV 21 KVpys The main application for this combination is for diagnosis of water tree deteriorated XLPE cables The system works equally well when other types of non linear materials are to be characterized Art No CK 29090 ORDERING INFORMATION IDA 200 Insulation Diagnostic System Art No CK 19090 For mains voltage 115 230 V AC switch selectable
5. ique General Description Portable computerized insulation diagnostics system Design The instrument is intended for use in high voltage substations and industrial environments Measurement Capacitance and dielectric losses in insulating materials at variable frequency Application Preventive maintenance diagnostic measurements of electrical insulation in eg e Power transformers e Instrument transformers e Bushings e Cables Measurement signal Voltage current O 10 Vpeak O 50 MApeax low range Voltage current O 200 Vpeak 0 50 MApeax high range Frequency 1000 Hz 0 0001 Hz Upper frequency current limited Measurement ranges Capacitance Range 10 pF 100 mF Dissipation factor Range O 10 with retained accuracy of capacitance otherwise higher Measurement inaccuracy vs sample capacitance and measurement frequency Sample capacitance Area Capacitance tand 2 0 5 1 pF 2 0 0005 3 0 5 1pF 2 0 0020 1 uF 100 nF 10 nF 0 1 mHz 1 mHz 10 mHz 100 mHz 1 Hz 10 Hz 100 Hz 1 kHz Measurement frequency Man Machine Communication IDA 200 contains an integrated PC and proprietary IDA 200 application software based on a Windows embedded NT platform Display screen 16 cm 6 4 TFT Color Monitor Mouse Keyboard Included as standard accessory Floppy Disk Drive 1 44 MB USB port For external keyboard Ethernet Serial port
6. osic power cable insulation Since moisture gives a characteristic change of cellulose response IDA 200 is suitable for assessing the average moisture content in paper insulated power cables PILC cables Dissipation factor 41 kV PILC cables Tana ia i ae Lal ee ee ee ee a a 10 t Ses PPEP bon ented a SS eer 0 01 0 1 1 id 100 1000 The graph shows the results from measurements of a new cable and a service aged cable SPECIFICATIONS Technical description The system measures the impedance of a specimen at a variable voltage and frequency A Digital Signal Processing DSP unit generates a test signal with the desired frequency This signal is amplified with an internal amplifier and then applied to the specimen The voltage over and the current through the specimen are measured with high accuracy using a voltage divider and an electrometer Ampere meter Schematic block diagram of the IDA 200 system For the measuring input IDA 200 uses the DSP unit that multiplies the input measurement signals with reference sine voltages and then integrates the results over a number of cycles With this method noise and interference is almost completely rejected allowing IDA 200 to work with low voltage levels and still achieve high accuracy Sinewave Generator Real Ch Imag Ch Real Ch 1 Imag Ch 1 Principle of the sine correlation techn
7. uid such as mineral oil and gas Insulation systems that include solid and or liquid insulation are candidates for diagnostic measurements IDA 200 is not suited for pure gas insulated systems Electrical insulation systems as found in the objects listed above usually consist of a combination of different materials In the following we will illustrate how IDA 200 can be used to determine the condition in some of the most commonly used insulation systems APPLICATION EXAMPLES Dielectric properties of mineral oils Transformer oil is a non polar liquid with a capacitance that changes very little with frequency But oil also has a DC conductivity that varies with the quality of the oil AS a result measured dissipation factor is inverse proportional to the frequency Dissipation factor Transformer oils Tana 10 D i n wean t i sreereaneefuenennee ren Tinge P J 10 16 4 oO 007 100 1000 a 0 01 0 1 1 10 Frequency Az The figure shows a typical response of oil with low conductivity and another oil with higher conductivity Dielectric properties of cellulosic paper Oil impregnated cellulose e g transformer pressboard and Kraft paper used in paper cables have a more complex structure and it is characterized by frequency dependence in both capacitance and loss Since ageing produces moisture the moisture content of cellulose is used as an aging status indicator Dissipation factor Kraft paper Tan
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