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PONOVO POWER CO., LTD
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PCT200 Series CT/PT Testing System
VERSION:
DATE:
This manual is the publication of PONOVO POWER CO., LTD. Any form of copy should obtain the
consent of it.
This manual represents the technical status for the moment of publishing. The product information,
description and specifications mentioned in the manual do not have any contact binding force and
PONOVO POWER CO., LTD remains the right to make modifications to the technical
specifications and configurations without prior notice. PONOVO POWER explicitly exonerates
itself from all liability for mistakes in this manual
PCT200 Series CT/PT Testing System User Manual
User Manual
PCT200 -AE-1.50
FEB. 2023
1
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Table of Contents
Related Manuals for Ponovo PCT200 Series
Summary of Contents for Ponovo PCT200 Series
- Page 1 PCT200 -AE-1.50 DATE: FEB. 2023 This manual is the publication of PONOVO POWER CO., LTD. Any form of copy should obtain the consent of it. This manual represents the technical status for the moment of publishing. The product information, description and specifications mentioned in the manual do not have any contact binding force and PONOVO POWER CO., LTD remains the right to make modifications to the technical...
- Page 2 PCT200 Series CT/PT Testing System User Manual Notes： In order to prevent static electricity, the PCT and test CT must be connected to ground safely before test. Avoid electric shock accident when the output voltage is above 36V. Short circuit is prohibited at output side while testing.
- Page 3 PCT200 Series CT/PT Testing System User Manual Special Tips: 1. CT/PT testing system (called PCT) is applied in the electromagnetic and low leakage flux current transformer (CT without gapped core or compensation) and inductive voltage transformer (PT) of power system. It completes the following test items: CT load impedance ...
- Page 4 PCT200 Series CT/PT Testing System User Manual 5. It is prohibited to maintain reform, extend or change the system or any other accessories. 6. Only original accessories are accepted in test and detection process. 7. Do not switch-on and operate PCT in the place having explosive gas or water vapor 8.
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Page 5: Table Of Contents
PCT200 Series CT/PT Testing System User Manual Content General Description ........................7 1.1 Functions ..........................7 1.2 Technical Specifications ...................... 9 1.3 Features ..........................11 1.4 Operation Preparation ....................... 12 1.5 Block Diagram ........................13 Panel Description ........................14 Operation Instruction ....................... 15 3.1 Set Test Parameters ...................... - Page 6 PCT200 Series CT/PT Testing System User Manual 4.4.4 Excitation Test ......................38 4.4.5 Ratio Test ........................ 40 Burden Test ..........................41 5.1 Wiring Connection ......................41 5.2 Test Operation ........................42 PT test ............................. 43 6.1 Wiring Connection ......................43 6.1.1 Polarity and Ratio Test ....................
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Page 7: General Description
PCT200 Series CT/PT Testing System User Manual 1. General Description 1.1 Functions PCT200i PCT200Ai CT type P, TP, M P, TP, M (0.2S) Ratio ◆ ◆ Polarity ◆ ◆ Coarse ratio ◆ ◆ Guess ratio ◆ ◆ Turn-ratio and error ◆... - Page 8 PCT200 Series CT/PT Testing System User Manual Transient dimensioning factor (Ktd) ◆ ◆ Symmetrical short-circuit current ◆ ◆ ratio (Kssc) Peak instantaneous (total) error εˆ ◆ ◆ Guess nameplate △ △ Report tools ◆ ◆ Ratio △ △ Polarity ◆...
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Page 9: Technical Specifications
PCT200 Series CT/PT Testing System User Manual 1.2 Technical Specifications Items PCT200i PCT200Ai Output voltage range 0-120V Output current range 0-5Arms (15A peak) Output power 0.0001-500VArms (1500VA peak) Ratio test range 30,000:1-45,000:5 1-2,000 0.05% Typ. 1-2,000 0.02% Typ. 0.10%Gur 0.05%Gur 2,000-5,000,0.08%Typ. - Page 10 PCT200 Series CT/PT Testing System User Manual Storage temperature -25℃~70℃ Relative humidity 5%~95% non-condensing Dimensions 470x200x245mm (WxHxL) Weight 10kg 14kg LCD display 8.4-inch, color display Operating system Windows 7/XP Note: The corresponding temperature of each parameter is 23℃±5℃. It is suggested the preheat time is longer than 15 minutes.
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Page 11: Features
PCT200 Series CT/PT Testing System User Manual 1.3 Features Apply the newest principle of multi point DC method and meet the standard of IEC 60044-6 The voltage measurement of ratio and phase displacement complies with standard of IEC ... -
Page 12: Operation Preparation
PCT200 Series CT/PT Testing System User Manual 1.4 Operation Preparation Preparation: CT secondary side load loop disconnection and secondary winding off-grounded CT primary side disconnects with busbar Order of connection: 1. The chassis of PCT is grounded. 2. One end of CT primary side grounded (P2) Note: There is a grounding switch in one side of primary. -
Page 13: Block Diagram
PCT200 Series CT/PT Testing System User Manual 1.5 Block Diagram... -
Page 14: Panel Description
PCT200 Series CT/PT Testing System User Manual 2. Panel Description Connecting CT secondary side for output (PT secondary for excitation) Connecting CT secondary side for measurement (PT secondary for excitation) Connecting CT primary side for measurement Connecting PT primary side for output Connecting PT Secondary side for measurement Please refer to the Wiring Connection in chapter 4.1 and 5.1 for CT and PT. -
Page 15: Operation Instruction
PCT200 Series CT/PT Testing System User Manual 3. Operation Instruction 3.1 Set Test Parameters Set variable parameters by pushing keyboard and pressing mouse. -
Page 16: Select Test Functions
PCT200 Series CT/PT Testing System User Manual 3.2 Select Test Functions After the CT settings are set, then press CT Auto Test to choose the required CT Test Task. -
Page 17: Control Output
PCT200 Series CT/PT Testing System User Manual 3.3 Control Output After the test task is selected, click Run on the interface or press button Run on the panel to start testing, During testing, the operation indicator will be flashing. The test can be stopped by clicking Stop on the interface or press button Stop on the panel. -
Page 18: Ct Test
PCT200 Series CT/PT Testing System User Manual 4. CT Test 4.1 Wiring Connection While doing the CT secondary coil resistance, polarity, excitation, demagnetization and ratio test, the instrument transformer tester should be connected according to the below diagram. Load Wiring direction: The transformer’s output S1 and testing side S1 are connected with one side of CT secondary. - Page 19 PCT200 Series CT/PT Testing System User Manual The transformer secondary tap is connected by claps and the following four-cable connection is applied. Four-cable connection Two-cable connection Otherwise, the chuck resistance might affect measuring result and the CT tester might list the incorrect measuring result.
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Page 20: Transmission Line Ct Test
PCT200 Series CT/PT Testing System User Manual 4.1.1 Transmission line CT Test Load... -
Page 21: Ct Test In Delta Connection Transformer
PCT200 Series CT/PT Testing System User Manual 4.1.2 CT Test in Delta Connection Transformer In order to reduce interference, other windings of the CT transformer should be short circuit. -
Page 22: Ct Test In The Star Connection Transformer
PCT200 Series CT/PT Testing System User Manual 4.1.3 CT Test in the Star Connection Transformer In order to reduce interference, other transformer’s windings should be short circuit. -
Page 23: Bushing Ct Test
PCT200 Series CT/PT Testing System User Manual 4.1.4 Bushing CT Test In order to reduce interference, other windings of the CT transformer should be short circuit. -
Page 24: Test Ct With Tapping
PCT200 Series CT/PT Testing System User Manual 4.1.5 Test CT with Tapping All the windings in the same shank are all switched on while testing CT with tapping. Keep other taps open circuit Load... -
Page 25: Test Ct In Gis
PCT200 Series CT/PT Testing System User Manual 4.1.6 Test CT in GIS Grounding Switch Load... -
Page 26: Testing Process
PCT200 Series CT/PT Testing System User Manual 4.2 Testing process 4.2.1 Settings Select CT parameter setting menu after entering into main menu. The CT nameplate parameters can be set by mouse or keyboard. The testing result will be correct on condition that the settings are right. -
Page 27: Settings For Different Ct
PCT200 Series CT/PT Testing System User Manual 4.2.2 Settings for Different CT P type CT parameter setting:... - Page 28 PCT200 Series CT/PT Testing System User Manual TPY type CT parameter setting:...
- Page 29 PCT200 Series CT/PT Testing System User Manual M type CT parameter setting:...
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Page 30: Ct Auto Test
PCT200 Series CT/PT Testing System User Manual 4.3 CT Auto Test 4.3.1 Test Process After the CT parameters are set well, all the CT testing items can be finished in CT Auto Test automatically. In CT Auto Test, CT excitation, polarity, ratio, secondary winding resistance and demagnetization tests all can be done. - Page 31 PCT200 Series CT/PT Testing System User Manual polarity, secondary side resistance test result can be checked in this unit. The test result for each CT test item can be checked in its interface. Excitation test result should be checked in CT Excit. unit. In Assess unit, the result judgement will...
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Page 32: Assessment
PCT200 Series CT/PT Testing System User Manual 4.3.2 Assessment In the CT Parameter Assess areas, the assessment items will be automatically activated according to the test CT type and standards. - Page 33 PCT200 Series CT/PT Testing System User Manual In this case the FS is 5 on the CT nameplate, but the FS>4.016. It means while making this kind of CT, the PCT can only test FS at 4.016 times, but can’t get the exact FS value.
- Page 34 PCT200 Series CT/PT Testing System User Manual In this case, the test engineer can decide to pass or fail the result separately and save the assessment report.
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Page 35: Ct Test For Single Item
PCT200 Series CT/PT Testing System User Manual 4.4 CT Test for Single Item Sometimes not all the CT test tasks are required to be tested once. In this case, the single CT test item can be selected for testing. More detailed test result can be checked in each unit. -
Page 36: Rct Measuring
PCT200 Series CT/PT Testing System User Manual 4.4.2 Rct Measuring CT secondary winding resistance test can be done after selecting the Rct/Polarity/Demagnet/ Burden measuring unit. Entering the Rct measuring unit, the secondary winding Rct can run automatically after pressing the run button. The measuring result 25 degrees celsius means the resistance at current temperature and the 75 degrees celsius means the resistance at 75 degrees celsius. -
Page 37: Demagnetization
PCT200 Series CT/PT Testing System User Manual 4.4.3 Demagnetization CT demagnetization can be done after selecting the Rct/Polarity/Demagnet/ Burden unit. The process will automatically run when entering the unit and pushing the run button. After the test, it will automatically stop and the lamp is off. -
Page 38: Excitation Test
PCT200 Series CT/PT Testing System User Manual 4.4.4 Excitation Test CT excitation test can be done in CT Excit. unit. Press Run to start the test. It stops automatically after test is finished and the lamp is off. The test result can be display in V-A curve or V-A Data. - Page 39 PCT200 Series CT/PT Testing System User Manual Press V-A Data, the excitation curve can be changed into data table to check every voltage, current, magnetic flux and inductance figure.
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Page 40: Ratio Test
PCT200 Series CT/PT Testing System User Manual 4.4.5 Ratio Test CT ratio test can be made in CT Ratio unit. CT ratio, ratio error, phase displacement, composite error and turns ratio error can be automatically tested. When the test is completed, it stops automatically and the lamp is off. -
Page 41: Burden Test
PCT200 Series CT/PT Testing System User Manual 5. Burden Test 5.1 Wiring Connection Connecting the instrument transformer according to the below direction, while doing secondary load impedance test. Load Wiring direction: The transformer’s output end S1 and testing end S1 are connected with one side of secondary load the CT. -
Page 42: Test Operation
PCT200 Series CT/PT Testing System User Manual 5.2 Test Operation Entering the main menu and selecting the CT Rct/pol./Dem./Burden test unit, CT secondary burden measuring can be done. After entering this unit and moving the cursor to the Burden box, Press Run to start the test. -
Page 43: Test
PCT200 Series CT/PT Testing System User Manual 6. PT test 6.1 Wiring Connection 6.1.1 Polarity and Ratio Test Connect PCT200 with PT as illustrated in below pictures when doing PT polarity and ratio test. 1 PH VT 3 PH VT... - Page 44 PCT200 Series CT/PT Testing System User Manual Wiring directions：The output “A” of transformer is connected with one side of PT primary. The output “N” of transformer is connected with one side of PT primary. The secondary testing end “a” of transformer is connected with one side of PT secondary.
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Page 45: Excitation Test
PCT200 Series CT/PT Testing System User Manual 6.1.2 Excitation Test Connect PCT200 with PT as illustrated in below when doing PT excitation test. 1 PH VT Single-phase voltage transformer 3 PH VT Three-phase voltage transformer Wiring directions: The output S1 of PCT is connected with one side of PT secondary. -
Page 46: Test Operation
PCT200 Series CT/PT Testing System User Manual 6.2 Test Operation 6.2.1 Settings Set parameters according to PT nameplate. -
Page 47: Polarity And Ratio Test
PCT200 Series CT/PT Testing System User Manual 6.2.2 Polarity and Ratio Test After the PT parameters are set well, press Run to start the PT polarity and ratio test. -
Page 48: Excitation Test
PCT200 Series CT/PT Testing System User Manual 6.2.3 Excitation Test Move the cursor into the Excitation test box to Run the test. The voltage and current value can be checked in the V-A curve. Press Save button to save the testing report after finished the test. -
Page 49: Report
PCT200 Series CT/PT Testing System User Manual 7. Report 7.1 Report Save and Copy After all the testing is finished, select the Report unit and enter into report save interface. In the Report page, the report name can be edited. - Page 50 PCT200 Series CT/PT Testing System User Manual Synchronize CT Report: Synchronize today’s or all the reports into mobile disc showing below. Save CT Report: Save the reports to Disc D. Synchronize PT Report: Synchronize today’s or all the reports into mobile disc showing below.
- Page 51 PCT200 Series CT/PT Testing System User Manual Report folder: Select the report folder to be synchronized. Target folder: Select the folder to save the synchronized reports. Synchronize Folder: Synchronize all the reports in the folder. Sync today’s CT/PT report: Synchronize the day’s CT/PT reports.
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Page 52: Pct Report Tools User Manual
PCT200 Series CT/PT Testing System User Manual 7.2 PCT Report Tools User Manual Right click to run as administrator to install the PCT Report Tools in the PC. Right click to select run as administrator to run the Report Tools. - Page 53 PCT200 Series CT/PT Testing System User Manual Figure 1 Figure 2 In figure 1, it is the PC software interface installed Excel. In figure 2, it is in the PCT system or the PC software interface without Excel. CT multi-report analyze: to analyze the CT multi-report and curve.
- Page 54 PCT200 Series CT/PT Testing System User Manual Files: 1. Open Files: open the PCT report (.pct format) Open the selected PCT report. Max 50 reports can be opened and listed. Among the listed reports, max 6 report data and curve will be shown in the right.
- Page 55 PCT200 Series CT/PT Testing System User Manual Open files list: the selected report will be listed here. The IEC/IS and IEEE standardized reports are categorized separately. The successfully opened reports are displayed in red with tick in box. The reports waiting for open are displayed in black without tick.
- Page 56 PCT200 Series CT/PT Testing System User Manual The contents of the selected reports will be shown as below. Settings: The CT parameters The number keys are used to switch among the selected reports or click the number to change the setting page.
- Page 57 PCT200 Series CT/PT Testing System User Manual Results: The results for excitation, burden, polarity, RCT, coarse ratio and rated ratio.
- Page 58 PCT200 Series CT/PT Testing System User Manual V-A Curve: excitation curves Move the cursor to the curve zone and right-click mouse to set the background color. Right-click menu (Add user data): Operation valid during testing process. Use the number key to choose one curve to display on the top and in bold.
- Page 59 PCT200 Series CT/PT Testing System User Manual V-A Data: The current and voltage data according to the V-A curve.
- Page 60 PCT200 Series CT/PT Testing System User Manual Ratio Error Graph: It shows the ratio error. The ratio error range should be within the red lines and the assessment will be passed ok; Otherwise, it will be failed.
- Page 61 PCT200 Series CT/PT Testing System User Manual Phase Displacement Error Graph: It shows the phase displacement error. The error range should be within the red lines and the assessment will be passed ok; Otherwise, it will be failed. JPG file list: List the screenshot files.
- Page 62 PCT200 Series CT/PT Testing System User Manual Excel file list: The Excel reports generated previously will be listed here. Double click the report to open it in Excel when the Excel is installed in the PC. Remove: it works the same as selecting the report file with tick in box in open file list.
- Page 63 PCT200 Series CT/PT Testing System User Manual The following is sample Excel format report generated by PCT Report Tools in PC, A4.
- Page 64 PCT200 Series CT/PT Testing System User Manual...
- Page 65 PCT200 Series CT/PT Testing System User Manual...
- Page 66 PCT200 Series CT/PT Testing System User Manual Back: back to the main interface Exit: exit the program.
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Page 67: Troubleshooting
PCT200 Series CT/PT Testing System User Manual 8. Troubleshooting During the testing, there might be some failure messages occurred. The followings are the measures we suggest for the corresponding failure messages for reference. 1) Message “Output stop! Low Inductive Load!”, it might be caused by: A. - Page 68 PCT200 Series CT/PT Testing System User Manual The reason is the Office Excel is not installed in the present PC.
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Page 69: Appendix A: Glossary
PCT200 Series CT/PT Testing System User Manual Appendix A: Glossary CT: current transformer PT: Voltage transformer P/TP/M: the type of CT. protection current transformer class P M: measurement current transformer PR: protection current transformer class PR PX: protection current transformer class PX... - Page 70 PCT200 Series CT/PT Testing System User Manual (ms): specified primary time constant (ms): secondary loop time constant : specified time to accuracy limit t’’: duration of the second fault t’: duration of the first fault ’: specified time to accuracy limit in the first fault ’’: specified time to accuracy limit in the second fault...
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Page 71: Appendix B: Ct Test Items
PCT200 Series CT/PT Testing System User Manual Appendix B: CT Test Items The CT test items will be different according to the CT type and its accuracy class. This is regulated by IEC/IEEE/IS standards. Here it takes IEC60044-1 as an example. - Page 72 PCT200 Series CT/PT Testing System User Manual Limits of error for protective current transformers Limits of error for class PR protective current transformers...
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