CT ANALYZER
Contents
1. Report templates included in the Remote Excel File Loader Ratio Test The ratio test measures the current ratio of the CT with consideration of the nominal and operating burden No external burden is necessary burden is part of modeling therefore a recalculation of current ratio error with different burden 15 also possible after the test The results from the ratio test are displayed on the screen in different cards e The Ratio card shows the polarity the turns ratio error composite error current ratio error and the phase displacement dependent on primary current and operating burden defined in the CT Object card The Ratio and Phase table shows the ratio and phase error for all different values of primary current and burden variations that are defined in the standards After the measurement is completed the Ratio card allows the burden and or primary current I p to be changed to allow the effect on the ratio and or phase error to be observed Possibility to compensate the ratio error of a CT used within a delta connected Transformer All results that are visible on the screen will be stored automatically in the test result file Assessment The Assessment card shows the automatic and manual assessment of the CT as a result of the testing The automatic assessments are based on a comparison of the measured values to the requirements of the selected standard and the selected pa2. CT Analyzer Functionality continued Netsim Support The CTA to NETSIM export Tool allows to import the CT data from a CT Analyzer test report into the Test Universe network simulation software NetSim to use the measured data for network simulation Calibration A typical accuracy of 0 02 1 enables field calibration and verification of class 0 1 CTs for metering Assessment Automatic result assessment according to the defined Standards IEC 60044 1 IEC 60044 6 or IEEE C57 13 1993 using implemented expert knowledge also of specialized CTs such as PX TPS TPX TPY and TPZ Reporting Comprehensive viewing and printing of test reports on a PC for different applications standards and classes using the predefined Microsoft Excel templates Network simulation software NetSim Simulation Existing test reports can be loaded at any time to recalculate the test results for different burden values and primary currents This way no further on site measurements are necessary to verify whether a changed burden influences the behavior of a CT The recalculation of the test results can be easily performed back in the office using the existing measurement data Remote Control and Test Automation Remote interface to integrate CT Analyzer into an automatic production process CT Analyzer can be fully controlled over the remote interface All parameters can be read from the device or from a test report with a sim
3. Calculation of Ktd CT ANALYZER OMICRON AAT i m iu us ail m scu CCG The Unique Solution OMICRON s CT Analyzer delivers a unique capability for the fast comprehensive testing and calibration of current transformers for protection and metering engineers as well as CT and switchgear manufacturers The equipment provides automatic testing and calibration for all types of low leakage flux current transformers both on site in the power system as well in the controlled environment of CT and switchgear manufacturers In the final step the CT Object card shows the measured values for Burden measurement rated primary and secondary current the CT class and the CT designation A wide range of measurement functions can be provided c T Object Resi CT Winding resistance measurement mE v M a measurement CT or JQOULUR l er CT Excitation characteristic recording for a protection CT VA nominal m a T i MF gnz bo 05 e transient behavior measurement IEC 60044 6 burden Burden operating Burden Standards BDDd4 1 and CosPhi results are stored on e CT ratio measurement with consideration of nominal and the Compact Flash card and can be connected burden easily transferred to a PC eady CT phase and polarity measurement Determination of accuracy limiting factor ALF instrument security factor
4. Burden cos Operating burden and cos more extended parameter page for IEC 60044 6 and IEC 60044 1 class PX CTs Extended Object Page The extended object page is used to enter class dependent parameters for assessment or for the calculation of the transient behavior according IEC 60044 6 Settings on this page t al e Kssc rated symmetrical short circuit current factor t al2 Ktd transient dimensioning factor Ts Tp secondary and primary time constant Seq duty of the protection tall tal2 11 12 tfr timing parameters for duty Rct expected winding resistance Ek le E1 le1 Ual lal accuracy limiting voltage and current Burden Test The Burden Test Card allows the measurement of a current transformer s secondary burden by injecting AC current into the load up 5 A The results of the burden test shown D va 15 on the display as follows meas V meas Current and voltage measured during the test e Burden cos Z Calculated values Resistance Test The CT winding resistance is needed for several calculations in the excitation and ratio test During the test a DC current is applied to the CT until saturation is reached The following results are shown on the Resistance card 1 00348 W D ae ey 00 C 3 2270 DC V DC Measurement current and voltage e R meas Measured resistance R ref Temperature compensa
5. y L8 0 0001 le A Series I kn V kn amp i I kn2 V kn2 Excitation test example for 17 kV 53 3 4 7 Ty 4 2mH geld 15 OMICRON CT Resi Een otandard 60044 1 15 008 I knz Lm 1 0 1 0 800 aT Foi 4 46 Excit Graph Results ith Ham Burden 40 15V I krz 3 45 24 3 10 31 Kr 4n 15V I al Graph Results ith Mom Burden Results 489 948 Op 10000 CON Lis ht ett NIIT TTI ILL LLLLJ LLLI si 4 le A Series amp I kn V kn a Excitation test up to 12 7 kVA on TPZ Es V mr Fi 0 01 04 le A Series 4 amp Hkn v kn amp I kn2 v kn2 Excitation curve down to 1 mV CT Analyzer Functionality continued CT Resis Excit oatandard 50044 1 Class 0 1 Burden 15 0004 Cosme 0 900 Ratios 1000 0 9993 0 070 Po OK to 0 076 D 45min Results shown on the Ratio Card Srg vahe Standard 60044 1 Parameter O14 tril Results shown on the Assessment Card
6. FS secondary time constant Ts remanence factor Kr transient dimensioning factor The Phase Table shows Ktd knee point voltage current class saturated and non the phase error at saturated inductance nominal burden and at different currents and at VAMOS e Assessment according to defined standards 25 50 and 100 15 00 0 800 IEC 60044 1 IEC 60044 6 IEEE C57 13 1993 7 50 0 800 of rated power bo gris Unique Features amp Benefits 1 00 1 000 Extremely small and lightweight lt 8 kg 17 Ib particularly beneficial for on site testing Reduced commissioning time due to fully automatic testing according to IEC 60044 1 IEC 60044 6 and IEEE C57 13 Results within seconds First portable device that can test CTs built according to IEC 60044 6 with defined transient behavior The Pails Table shovs Calibration of measuring transformers A typical accuracy of IHE eror at nemus E E 0 02 1 enables field calibration and verification of class burden and at different Burden at of rated current 0 1 CTs for metering currants and af 25 96 VA Cosp 1 e Automated assessment according to the defined standards 50 95 and 100 95 of Td IEC 60044 1 IEC 60044 6 or IEEE C57 13 1993 also of rated power specialized CTs such as PX TPS TPX TPY and TPZ Allows testing of CTs power frequencies from 16 to 400 Hz Name plate guesser function allows
7. 4V 3 2400 3 9402 resistance R ct 10 Standard 60044 1 Class I 608 0800 _ 7 Wks 63 31 l kr 70 4 25 4 77 FSi 4 2mH fer ols 0 900 Encit 4 46 Results 43 9H ith Mom Burden Results with Burden 11 96mA The excitation curve derived from the test 15 displayed on the unit This curve can be compared with the result of a previous test loaded from a Compact Flash card First the device applies a 1 A DC current to the secondary terminals of the CT and measures the winding The Resistance displays the measured resistance The excitation curve is measured and the knee point voltage and other important CT data are determined Depending on the value of the knee point voltage the CT Analyzer identifies the test object as either a measurement CT or a protection CT and determines the nominal burden if not defined in the object page CT Analyzer Functionality CT Object The CT Object card is the central element within the user interface which contains all of the necessary test settings for a CT test ICT Ohject Resi Asse Settings on this page e 5 Rated primary secondary current Standard Standard to which the test 15 to be performed e P M CT type definition protection or measurement Class f Class and rated frequency of CT VA Rated burden
8. RON Sales Service Centers Europe Middle East Africa OMICRON electronics GmbH Oberes Ried 1 A 6833 Klaus Austria Phone 43 5523 507 0 Fax 43 5523 507 999 info omicron at www omicron at North and South America OMICRON electronics Corp USA 12 Greenway Plaza Suite 1510 Houston TX 77046 USA Phone 1 713 830 4660 1 800 OMICRON Fax 1 713 830 4661 info omicronusa com www omicronusa com Asia Pacific oe OMICRON electronics Asia Limited Suite 2006 20 F Tower 2 ES The Gateway Harbour City Kowloon Hong Kong S A R N Phone 852 2634 0377 EN Fax 852 2634 0390 info asia omicron at een www omicron at aati OMICRON 1095 Subject to change without notice Last update July 2008 iom ae
9. automatic parameter search and analysis of CTs with unknown data European Patent EP1 653 238 B1 High level of safety all tests use low voltages 120 V European Patent EP 1 398 644 B1 Precise measurement of ratio error and phase displacement The ratio error phase error and ct Resis Excit gl up to x times the rated current and for all burden values composite error for the operating Standard 60044 1 Cla without the need to connect burden hardware independent burden can now be measured and Eureen 12 0078 _ Co of the application e g bushings and GIS displayed ees Pols E Phases M 998 97 1000 04 e Test of CTs with very high knee point voltages up to 30kV Automatic demagnetization of the CT after the test if the in seconds The results nominal CT data is unknown even The CT Analyzer performs an automatic parameter search and CT test using the Name plate guesser function For standard current transformers it allows the user to do a test with minimal training and no knowledge of the CT to be tested All that is needed is to follow these steps 1 01348 e c WDC R tImeas R ref OMICRON Connect the CT as indicated on the CT Analyzer front panel go to the CT object card on the user interface and start a CT test with default settings A fully automated test procedure will be started while no settings or rewiring 15 necessary 3 2n0
10. e CTA Quick Test CT Excel File Loader and other tools VESMOS800 CPC Explorer software PC software for visualization and handling of test reports VESD6004 Accessories set for the CT Analyzer VEHK0650 Coax measurement cable set with banana plugs 2 x 1 x 10m VEHK0651 Battery clamp set with 4 mm banana sockets for primary side connection consisting of one red and one black battery clamp VEHZ0652 Crocodile clamp set 2 x red 2 x black 20 mm opening width VEHZ0656 Grounding PE cable gn ye 1 x 6 m 6 mm used for protective earth connection 615 Flexible terminal adapters with 4 mm banana socket 6 x reorder in sets of 12 50009 Carry bag for the CT Analyzer 18 Additional Accessories for CT Analyzer Coax measurement cable set with banana plugs 2 3 1 x 10m VEHKO0651 Coax measurement cable with banana plugs 3 m VEHK0654 Coax measurement cable with banana plugs 6 m VEHK0652 Coax measurement cable with banana plugs 10 m VEHK0653 Coax measurement cable with banana plugs 15 m VEHK0655 Coax measurement cable with banana plugs 100m VEHK0656 Coax measurement cable set with Kelvin clamps 3 m for measurement on 5 A CTs during production VEHK0657 Pluggable 23 turns winding VEHK0658 Battery clamp set with 4 mm banana sockets for primary side connection consisting of one red and one black battery clamp VEHZ0652 Crocodile clamp for secondary side connection with 4 mm banana socket 1 black and 1
11. g to class TPS et turns ratio error according to class TPS 27 peak instantaneous error V NEUES ER E mm E E cu 2 ie y GC y AX maximum emf voltage e Vkn Ikn knee point voltage current according to IEC 60044 6 IEEE C57 13 ANSI Vb secondary terminal voltage rating according to IEEE C 57 13 Vkn Ikn knee point voltage current according to IEEE C57 13 30 and 45 tangent OMICRON p gt ANANN ane NAIN mE AS i IN C gt w HATT Lf wad d echn ET OMICRON s CT Analyzer hardware includes Galvanically insulated electronic generator output Two galvanically insulated voltage measurement inputs Internal current measurement Compact flash card to store test results and update the device software The CT Analyzer conforms to CE and fulfills the requirements of IEC in terms of EMC and safety standards Hardware Specifications Generator amplifier section Output current 0 5 A rms 15 A peak Output voltage Us 120 Output power 400 VA 1500 VA peak Ratio accuracy For O VA up to rated power ratio 1 2000 0 02 96 ratio 2000 5000 0 03 96 ratio 5000 10000 0 05 96 Phase measurement Resolution 0 1 min Accuracy 1 min for cos 0 8 1 User interface Display readable in bright sunlight Nu
12. integrate the device in a fully automated test environment or to write your own customer specific user interface With the Remote Excel File Loader the device can be completely controlled via PC A test can be defined started and the results can be imported back into Excel As all test results are available in Excel it is quite easy to write customer specific test reports For an easy start with the remote interface some working samples are delivered with the device CTA QuickTest The CTA Quick Test is a PC Tool that does a large variety of measurements which are usually necessary in a utility by using CT Analyzer as Multimeter with integrated current voltage source measurement of Burden L C ratio polarity etc OMICRON Automated calculation of Ktd without remanence according to 60044 6 and with remanence Ktd OMICRON inti d 1 6 x ben i eii m oco 5 m3 TE Ei Ddy cto p an om m ot fe a 1 Iz OL gje mu Hn n3 5 25 aC EE ritina Comer 1 FF cee Mind 4 X rr Bou 0 30 nooo amma w mni puris KADOU Hz L IERIE H INERENTE 2 nae d nomi HE 0
13. merical keyboard and function keys for operation Data transfer Compact Flash card to store test results and for transfer of data to a PC Data can be read on a standard PC with the delivered software Remote interface to read write data from PC and to fully control the device with the PC Standards Safety EN60950 and EN61010 Calibration It is possible to buy a calibration CT certified from a national test institute VEHZ20649 with a ratio accuracy of 0 02 96 With this calibration CT a permanent check of the CT Analyzer accuracy is possible The device must not be sent back for calibration only the calibration CT Mechanical Data Weight 8 kg 17 4 Ib without accessories Dimensions W x H x D 360 x 285 x 145 mm 9 2 x 7 2 x 3 7 in Supply voltage Nominal voltage 110 V 240 V 10 96 50 60 Hz 500 Permissible range 85 V 265 V Ambient temperature 310 50 122 F Ordering Information CT Analyzer CT1 incl accessories VE000652 CT Analyzer standard package 000650 Accessories set for CT Analyzer VEHKO650 CT Analyzer standard package VE000650 CT Analyzer hardware VEGGO0650 Compact Flash card 128 MB memory space for at least 416 test reports VEHZ0654 USB 2 0 Compact Flash card reader VEHZ0655 USB RS232 converter cable with Nullmodem cable 20014 Power country dependent User Manual VESDO605 CT Analyzer PC toolset software for CT Analyzer with remote control softwar
14. ple to use software interface Possibility to create user defined test reports using the Remote Excel File Loader or by adaptation of sample software running under visual basic or C The Quick Test enables a large variety of measurements by using the CT Analyzer as Multimeter with integrated current voltage source e g measurement of Burden L C ratio polarity CT ANALYZER The unique analyzing solution for current transformers European Patent EP 1 653 238 B1 Measurement of CT parameters General Ls saturated inductance e Lm unsaturated inductance Kr remanence flux Ts secondary time constant Rct winding resistance current ratio error and phase error for all measurement points defined in the standard Ratio up to 50 000 1 Primary current up to 999 000 A IEC 60044 1 ALF ALFI accuracy limiting factor according to direct indirect measurement method FS FSI instrument security factor according to direct indirect measurement method Kx dimensioning factor according to class PX Ek le accuracy limiting voltage current according to class PX N turns ratio according to class PX t ec turns ratio and composite error e Vkn Ikn knee point voltage current according to IEC 60044 1 IEC 60044 6 Kssc rated symmetrical short circuit current factor Ktd transient dimensioning factor N turns ratio accordin
15. rameters on the CT Object card Additionally a manual assessment can be done Adaptable Reporting Templates All measured results can be saved as a standard XML file on a removable Compact Flash card This card can be read by a Windows PC allowing the test report to be easily imported into Microsoft Office software for further processing e g Microsoft Excel Microsoft Word Microsoft HTML The included Microsoft Excel templates offer different reports e g for single core cts multicore cts 3 phase test and can be modified by the customer They also give comprehensive viewing and printing options of test reports for different applications standards and classes Via the templates the user interface and report language can be changed on the fly i e it is easy to test in one language and print in another language Support for IEC 60044 6 CT Analyzer is the first known portable device available on the market that allows the test of CTs according to IEC 60044 6 The measurement is done according to the IEC 60044 6 standard low frequency and delivers all relevant results such as Kssc et s Vkn Ikn After the test the timing parameter can be changed in order to check the effect on the results CT Analyzer automatically carries out all necessary calculations which deliver the transient dimensioning factor Remote control interface for full production integration With the remote software it is possible to
16. red clamp VEHZ0651 Crocodile clamp set 2 x red 2 x black 20 mm opening width VEHZ0656 Grounding PE cable gn ye 1 x 6 m 6 mm used for protective earth connection VEHK0615 Flexible terminal adapters with 4 mm banana socket 50009 Compact Flash 32 MB memory space for at least 100 test reports VEHZ0653 Compact Flash card 128 MB memory space for at least 416 test reports VEHZ0654 USB 2 0 Compact Flash card reader VEHZ0655 USB RS232 converter cable with Nullmodem cable 20014 Training CT 300 5 class 0 5 FS 5 VEHZ0643 Calibration CT 2000 1 2000 5 class 0 02 for CT Analyzer calibration VEHZ0649 Transport case for the CT Analyzer with wheels VEHPO068 Carry bag for the CT Analyzer 18 Analyzer Add On Manual provides theoretical backgrounds and normative definitions only available in English VESD0607 OMICRON electronics 15 an international company that develops manufactures and markets innovative systems for the advanced testing of primary and secondary substation equipment including protection systems and power transformers By combining innovation leading edge technology and creative software solutions OMICRON 15 leader in these markets With sales in 130 countries offices in Europe North America Asia and Australasia and a worldwide network of distributors and representatives OMICRON has truly established a reputation as a supplier of the highest quality OMIC
17. ted resistance 2 9247 Results of the CT winding resistance measurement Es V Excitation Test The Excitation test measures and displays the excitation curve of the current transformer and determines a wide range of other parameters of the CT According to the selected standard terminal voltage emf voltage rms current or peak current 15 shown on the excitation graph Parameters are calculated for nominal burden and operating burden Depending on the selected standard the corresponding results are Knee point voltage and current FS ALF Instrument Security Factor or Accuracy Limiting Factor according to IEC 60044 1 direct measurement method FSi ALFi Instrument Security Factor or Accuracy Limiting Factor according to IEC 60044 1 indirect measurement method e Kssc Symmetrical short circuit current and transient dimensioning factor s Lu Saturated and non saturated inductivity s Secondary time constant Kr Remanence factor Val lal accuracy limiting voltage current peak instantaneous error at lpn Kssc Ktd E max Maximum e m f Excitation curve from 1 mV up to 30 kV Test of CTs with a knee point voltage up to 30 kV Only with our patented low frequency test principle it is possible to test such CTs without overstressing the insulation 100000 10000 LH a iT eB uda H BNET 1000 L 100 H jars sii 10 ma r D
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