CT AnAlyzer - Test and Measurement Hire Ltd
Contents
1. OMICRON CT ANALYZER ee i The Unique Solution OMICRON s CT Analyzer is a unique lightweight electronic multifunctional instrument designed to meet the highest standards for performing excitation ratio polarity and winding resistance tests on current transformers CTs as well as burden impedance measurement 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 The CT Analyzer allows an automatic assessment of test results clearly indicating whether the parameters of the CT under test match its specification It is the only known device able to test and assess CTs build according IEC60044 6 with defined transient performance TPS TPX TPY and TPZ Because of the patented EP 1 398 644 A1 low voltage test method it is possible to test CTs with a knee point voltage up to 15 kV without stressing the insulation of the CT max 120 V test voltage Testing of current transformers can be carried out to an extremely high level of accuracy The accuracy level 0 02 1 min makes the CT Analyzer the ideal tool for calibration and verification not only for protection CTs but also for class 0 1 CTs for metering A wide range of measurement functionalities can be provided e Burden measurement e CT Winding resistance measurement e CT Excitation2. Microsoft HTML The Compact Flash card can also be used for any future software updates that may be required for the CT Analyzer This can be carried out by downloading the latest firmware updates from OMICRON s website and transferring it to the device With the reomote control interface it s possible to fully control the device from PC and to up and download test reports to the CT Analyzer Support for IEC60044 6 CT Analyzer is the only probably device available on the market that allows the test of CT s according IEC 60044 6 The measurement is done according the standard low frequency and delivers all parameters that are relevant for the IEC60044 6 standard as Kssc Ktd et s Vkn Ikn under consideration of duty cycle and misc time constants After the test the device allows to assess if the CT fulfills the specified timing requirements or not CT Analyzer does all the calculation necessary to deliver the transient dimensioning factor Remote control interface for full production integration With the remote software it is possible to integrate the device in a fully automatic test environment or to write the own customer specific User Interface Excel File Loader or Remote Excel File loader allows to import the XML output files from CT Analyzer into Excel and to build customer specific test reports For an easy start in working with the remote interface working samples are delivered with the device CTA QuickTe
3. 0 02 1 enables field calibration and verification of measurements by using the CT Analyzer as Multimeter with class 0 1 CTs for metering integrated current voltage source e g measurement of e Assessment of protection transformers Automatic result Burden L C ratio polarity assessment according to the defined standard IEC 60044 1 IEC 60044 6 or IEEE C57 13 1993 using implemented expert knowledge regarding standards etc even for CTs defined according to IEC 60044 6 with defined transient performance TPS TPX TPY TPZ Reporting e Automatic test report generation Viewing and printing of test reports on a PC using the CPC Explorer or Excel File Loader CT ANALYZER The unique analyzing solution for current transformers European Patent EP 1 398 644 A1 Measurement of CT parameters General e Ls saturated inductance e Lu unsaturated inductance e Kr remanence flux e Ts secondary time constant e Rct winding resistance e current ratio error and phase error for all measurement points defined in the standard e Ratio up to 50 000 1 e Primary current up to 999 000 A IEC 60044 1 e ALF ALFI accuracy limiting factor according direct indirect measurement method e FS FSI instrument security factor according direct indirect measurement methode e Kx dimensioning factor according to class PX e Ek le accuracy limiting voltage current according to class PX e N turns ratio
4. according to class PX e st ec turns ratio and composite error e Vkn Ikn knee point voltage current according to IEC 60044 1 IEC 60044 6 e Kssc rated symmetrical short circuit current factor e Ktd transient dimensioning factor e N turns ratio according to class TPS e st turns ratio error according to class TPS e g peak instantaneous error e Emax maximum emf voltage incl the transient component e Vkn Ikn knee point voltage current according to IEC 60044 6 IEEE C57 13 ANSI e Vb secondary terminal voltage rating according to IEEE C57 13 e Vkn Ikn knee point voltage current according to IEEE C57 13 30 and 45 tangent OMICRON OMICRON s CT Analyzer hardware includes e Galvanically insulated electronic generator output e Two galvanically insulated voltage measurement inputs e Internal current measurement e 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 Arms 15 A peak Output voltage 0 120 V Output power O 400 VA 1500 VA peak Ratio accuracy For O VA up to rated power ratio 1 2000 0 02 ratio 2000 5000 0 03 ratio 5000 10000 0 05 Phase measurement Resolution 0 1 min Accuracy 1 min for cos 0 8 1 User interface Disp
5. characteristic recording e CT transient behavior measurement IEC60044 6 e CT ratio measurement with consideration of connected burden e CT phase and polarity measurement e Determination of accuracy limiting factor ALF instrument security factor FS secondary time constant Ts remanence factor Kr transient dimensioning factor Ktd knee point voltage current class saturated and non saturated inductance e Assessment according to defined standards IEC60044 1 IEC60044 6 IEEE C57 13 1993 The extremely small and lightweight lt 8 kg 17 Ib hardware is particularly beneficial for on site testing In the final step the CT Obyect card shows the measured values for rated primary and secondary current the CT class and the CT designation M for a measurement CT or P for a protection CT VA nominal burden Burden operating Burden and CosPhi All results are stored on the Compact Flash card and can be easily transferred to a PC eee resi Exc Ident enn Hanafi re TOPS aegis Se eee I pni zaga HA Std b 4 g i F Class Gel Fea WAG iz 386A Burden 12 56UA Pe Sy The Phase Table shows the phase error at nominal burden and at Wa Cosp i a ae different currents and at 75 age 806 0 05 25 50 and 100 7 58 8 200 0 16 3 75 6 800 of rated power The Ratio Table shows ratio error at nominal burden and at different currents and at 25 50 and 10
6. e g peak instantaneous error at lon Kssc Ktd e E max Maximum e m f Excitation curve from 1 mV up to 17 kV Test of CT s with a knee point voltage up to 15 kV Only with me our patented low frequency test principle it is possible to test such CTs without overstressing the insulation IEC 60044 6 Excitation Graph Excitation test up to 15 kV Excitation curve down to 1 mV AHA HA I sn 1 84 vaHz 15 58A Cosip OK A 13min ARRIBA 9996 H H22 e H z4 Enah s h daia add Fim Tig Ja 1 Ginn 1761000 i H a me i H umi par ih iH 00 of 1 par m im 1 P pm om im ow 06 1000 OF 00 06 0 Om om D w Settings xml io W Oo oe pii oo w Paw Plane eet et eel ewi Wh ion ia ih Hi F ah F Ef H E ES a T Obs car mo is 1 Results shown 41 Ow OF ob 681 63 O38 foe Grr on the O01 OM dia oia Om Oe Om oo oF 10 10 OF Cad OB CT OM OM LA 0 Ratio Card Hesessments for bhbh44 1 Parameter Auto Manual Results shown on the Assessment Card Abstract of the test report viewed within the CPC Explorer Ratio Test The ratio test measures the current ratio of the CT with consideration of the external burden or the rated power No external burden Is necessary burden is part of modeling therefore a recalculation of current error with different burden is also possible after the test The results from
7. 0 of the rated power The ratio error phase error and composite error for the operating burden can now be measured and displayed Power A Ab 1 Bee Phase displacement in minutes at of rated current Fower WAa Cosp 15 66 6 S86 7 5076 206 3 ToB S60 Be 1 Bee Current ratio error in at of rated current I pri Hebe BA f SIKH Burden 12 56U4 Co Ratio 2HBB B 9995 Fol OE Phase 8 88min H ZHBR HS Ratio 1 I in seconds if the 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 MESES kE Exc R ass Co bAR44 1 E Eurden PUA I test 1 88HA W OC CT GEE exc F Ass Co R meas 16 29 k ref OMICRON Connect the CT as indicated on the CT Analyzer front panel activate the CT object card on the user interface and start a CT test with default settings Main 16 123 12 318 ICT Fe SESE Z0 BA I n 6oe44 1 f WAS 127 584 Cosip U krn 7 Bel I En FS S 2T FSi Lz 3 amp mH Lu Ts 15 665 Dza 1 44 Main SBHz A
8. FMA 3 64 399 6H The device applies a 1A DC current to the secondary terminals of the CT and runs the fully automated test procedure no settings are necessary The Resistance Card displays the measured resistance R ct The CT Analyzer measures the excitation curve and determines the knee point and other important CT data Depending on the value of the knee point voltage the CT Analyzer D AS aj mm a a O aa i z m pS ey wn Gero fs co Te tre PSeae ae ee ee l f identifies the test object as either a measurement CT or a protection CT and determines the nominal burden if bB gg i i66 1H Enee Point Fef E 4 1E OEE The excitation curve derived from the test is displayed on the unit This curve can be compared with the result of a previous test loaded from a Compact Flash card not defined in the object page CT Analyzer Functionality HSBS kE Exc IF Ass Co Omicron Test settings xml Completely edited CT Object card Ts Tp I s 1 5A I test 1 64 I meas 993 6mA A Aa W meas 3 4581 HAS Burden 3 4 rA Cosip 1 Hee Ea eady Results of the burden measurement CT E RSB SAAE F lAs IC I test 1 86868 W DC 4 4450 k meas 146 364 k ref 12 390 Results of the CT winding resistance measurement CT Object The CT Object card is the central element within the user interface
9. Loader and other tools CPC Explorer software PC software for visualization and handling of test reports Accessories set for the CT Analyzer VEHK0650 Coax measurement cable set with banana plugs 2x3 m 1x 10m Battery clamp set with 4mm banana sockets for primary side connection consisting of one red and one black battery clamp Crocodile clamp set 2 x red 2 x black 20 mm opening width Grounding PE cable gn ye 1 x 6 m 6 mm2 used for protective earth connection Flexible terminal adapters with 4 mm banana socket 6 x Carry bag for the CT Analyzer Additional Accessories for CT Analyzer Coax measurement cable with banana plugs 3 m Coax measurement cable with banana plugs 6 m Coax measurement cable with banana plugs 10 m Coax measurement cable with banana plugs 15 m Coax measurement cable with banana plugs 100 m Crocodile clamp for secondary side connection with 4 mm banana socket 1 black and 1 red clamp Transport case for the CT Analyzer with wheels Calibration CT 2000 1 2000 5 class 0 02 CT Analyzer Add On Manual VE000652 VE000650 VEHKO650 VE000650 VEGG0650 VEHZ0653 VEHZ0655 VEHZ0014 VEHKO032 VESDO605 VESMO800 VESD6004 VEHK0651 VEHZ0652 VEHZ0656 VEHKO615 none VEHPO018 VEHKO0654 VEHKO652 VEHKQ653 VEHKQ655 E0521400 VEHZ0651 VEHPO068 VEHZ0649 VESDO607 OMICRON is an international company providing innovative power system testing soluti
10. lay readable in bright sunlight Numerical 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 with a standard PC and the CPC explorer Remote interface toe 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 with a ratio accuracy of 0 02 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 lb 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 50 60 Hz 500 VA Permissible range 85 V 265V Ambient temperature 10 ws 50 PCP 14 122 F r lh i z SS 5 F l Ordering Information CT Analyzer CT1 incl accessories CT Analyzer standard package Accessories set for CT Analyzer CT Analyzer standard package CT Analyzer hardware Compact Flash card 128 MB memory space for at least 416 test reports USB 2 0 Compact Flash card reader USB RS232 Converter and Cable RS232 Nullmodem Cable 3m Power cord country dependent User Manual CT Analyzer PC Toolset software for CT Analyzer with remote control software CTA Quick Test CT Excel File
11. n influences the behavior of a CT The recalculation according EC 60044 1 IEC 60044 6 and IEEE C57 13 within of the test results can be easily performed in the laboratory seconds using the existing measurement data either on the e Save operation due to a maximum output voltage of 120 V CT Analyzer within Excel File Loader or by using the remote e Automatic analysis of CTs with unknown data control interface guesser function patent pending Test of CTs with very high knee point voltages up to 15 kV Precise measurement of ratio error and phase displacement Remote Control and Test Automation up to x times the rated current and for all burden values without the need to connect burden hardware independent of the application e g bushings and GIS Automatic demagnetization of the CT after the test Data storage on a removable Compact Flash CF card which can be read by any standard memory card reader e Remote interface to integrate CT Analyzer into an automatic production process CT Analyzer can fully be controlled over the remote interface All parameters can be read from the device or from a test report with a simple to use software interface e Possibility to create user defined test reports using the Excel File Loader by adaptation of sample software running under visual basic or C Calibration and Assessment e Calibration of measuring transformers A typical accuracy e The CTA Quick Test enables a large variety of of
12. ons With sales in more than 120 countries offices in Europe the North America and Asia and a worldwide network of sales partners OMICRON has established a reputation as a supplier of leading edge technology OMICRON s automated primary and secondary testing capabilities are important benefits in light of the changing market conditions resulting in restructured organizations required to do more with less Services in the area of consulting commissioning testing and training make the product range complete Specialization and visionary leadership allows OMICRON to continue with revolutionizing developments for its solutions to meet the customer needs of the 21st century OMICRON 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 OMICRON electronics Asia Limited Suite 2006 20 F Tower 2 The Gateway Harbour City aF A Kowloon Hong Kong S A R Phone 852 2634 0377 i Fax 852 2634 0390 E info asia omicron at www omicron at ETER OMICRON L053 Subject to change without notice
13. sistance 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 e DC V DC Measurement current and voltage e R meas Measured resistance e R ref Temperature compensated resistance OMICRON Excitation Test a CT Res EES REISER Ass Co The Excitation test measures and displays the excitation curve oaa AA I sn of the current transformer and determines a wide range of SAGd44d 1 f other parameters of the CT using a current of up to 15 A 5 AAG Cosy peak Parameters are calculated for nominal burden and operating burden According to the selected standard terminal voltage emf voltage rms current or peak current is shown on the excitation graph Depending on the selected standard the corresponding results are e V kn l kn Knee point voltage and current e FS ALF Instrument Security Factor or Accuracy Limiting Factor ET 1200 1 8A according IEC60044 1 direct measurement method ee T apes e FSi ALFi Instrument Security Factor or Accuracy Limiting Factor according IEC60044 1 indirect measurement method e Kssc Ktd Symmetrical short circuit current and transient dimensioning factor e Ls Lu Saturated and non saturated inductivity e Ts Secondary time constant e Kr Remanence factor e Val lal accuracy limiting voltage current
14. st The CTA Quick Test is a PC Tool to do a large variety of measurements 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 Calculation of Ktd without remanence according IEC60044 6 and with remanence Ktd OM CRON CT Analwrer lin lew regency mu hi Di i y rme kj l 0 1 rA TISA Y Iy on IMS Y L D 01 93 A La RT a ky Alte a HSJA E Biz in LEIE LAA DODE ia aparea n S DO He 5 DO HI K MNOS HE Farnir ji fcc p 13 eS H Nom F HES o 4 iS p a Ser s a E a He Ce T A E e G eed Dirruk pria a ta ud 1 Dike ee Ay Heiani on Ea CT Analyzer Benefits 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 Unique Features Advantage of Simulation e Very small and lightweight lt 8kg 17lb particularly e Existing test reports can be loaded at any time to beneficial for on site testing recalculate the test results for different burden values e First portable device that can test CTs build according and primary currents This way no further on site IEC60044 6 with defined transient behaviour measurements are necessary to verify whether a changed e Reduced commissioning time due to fully automatic testing burde
15. 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 e The Ratio table shows the current ratio error dependent on current and the nominal burden e The Phase table shows the phase displacement dependent on current and nominal burden 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 parameters on the CT Object card Additionally a manual assessment can be done Comprehensive Test Reports 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
16. which contains all of the necessary test settings for a CT test Data is provided in the following fields e pn l sn Rated primary secondary current e Std Standard to which the test is to be performed e P M CT type definition protection or measurement e Class Freq Class and rated frequency of CT e VA Rated burden e Burden cos Operating burden and cos e more extended parameter page for IEC 60044 6 and IEC60044 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 IEC60044 6 Following parameters can be found on this page e Kssc rated symmetrical short circuit current factor Ktd transient dimensioning factor Vkn knee point voltage according to IEC 60044 6 Ikn knee point current according to IEC 60044 6 Ts Tp secondary and primary time constant Seq duty of the protection tal1 tal2 t1 t2 tfr timing parameters for duty Rct expected winding resistance Ek Ual le 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 to 5 A The results of the burden test are shown on the display as follows e meas V meas Current and voltage measured during the test e Burden cos o Z Calculated values Resistance Test The CT winding re
Download Pdf Manuals
Related Search