Megger Three-Phase TTR Instruction Manual Download Page 1

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AVTMTTR330

Rev 3

March 2010

Instruction Manual

for

Three-Phase TTR

Transformer Turn Ratio Test Set

TTR330 Series

Catalog Nos. TTR330, TTR330-47

HIGH-VOLTAGE EQUIPMENT

Read this entire manual before operating.

Valley Forge Corporate Center
2621 Van Buren Avenue
Norristown, PA 19403-2329
U.S.A.

610-676-8500

www.megger.com

Summary of Contents for Three-Phase TTR

Page 1: ...ase TTR Transformer Turn Ratio Test Set TTR330 Series Catalog Nos TTR330 TTR330 47 HIGH VOLTAGE EQUIPMENT Read this entire manual before operating M Valley Forge Corporate Center 2621 Van Buren Avenue...

Page 2: ......

Page 3: ...Three Phase TTR Transformer Turn Ratio Test Set TTR330 Series...

Page 4: ...pairing at our option defective equipment Equipment returned to the factory for repair must be shipped prepaid and insured Contact your Megger representative for instructions and a return authorizatio...

Page 5: ...ansformers 14 Three Phase Three Winding Transformers 15 Current Transformers CTs 16 BCTs Mounted on Three Phase Transformers 19 T Type Transformers 22 5 Operation 23 Power up 23 Navigating the screen...

Page 6: ...or Testing Taps on Multiple Tap CT 18 Figure 4 7 Setup for Testing BCT Mounted on Single Phase Two Winding Transformer 19 Figure 4 8 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Pow...

Page 7: ...Prior to operation check for loosened hardware or damage incurred during transit If these conditions are found a safety hazard is likely DO NOT attempt to operate equipment Please contact Megger as s...

Page 8: ...AVTMTTR330 Rev 3 March 2010 iv M...

Page 9: ...e transformer to be tested The TTR lead selection circuitry permits automatic measurement of all phases without changing connections This feature eliminates the need to refer to hook up charts when te...

Page 10: ...t Quick test mode provides the fastest testing of a transformer Three excitation test voltages 80 V 40 V and 8 V Testing to ANSI IEC and Australian standards Leads marked to ANSI IEC and Australian st...

Page 11: ...the direction indicated by the arrows 3 Voltage ON light Red indicator lamp indicates when lit that test voltage is being supplied to the Unit Under Test UUT 4 Remote Trigger receptacle Plug receptac...

Page 12: ...llows User to select Active area of the screen Keypad Key board for entering notes and data Power Suspend Prepares the Instrument for Shutdown A message will indicate when Input Power can be safely re...

Page 13: ...s ports HOME Action Icons Select to create NEW test Select to RECALL test Select to SAVE Test Select to ZOOM IN Select to ZOOM OUT Print Icon Prints the Selected Test Form Printer driver is factory in...

Page 14: ...Prints the Selected Report Printer must be standard USB supporting HP PCL protocol USB Out Icon Select to Transfer Files or Reports from external USB Memory Stick to the TTR USB In Icon Select to Tra...

Page 15: ...s of instantaneously lethal levels of electrical energy Observe the following safety precautions Observe all safety warnings on the equipment They identify areas of immediate hazard that could result...

Page 16: ...must be inserted only into a mating receptacle with a ground contact Do not bypass the grounding connection Any interruption of the grounding connection can create an electric shock hazard Determine t...

Page 17: ...nections should be made in the order as listed below 1 Ground Use the Megger supplied Safety Ground Cable 15 ft 4 6 m to connect the TTR330 Wing Nut Ground Terminal directly to Local Station Earth gro...

Page 18: ...distance then connect the LTC cable at this time 6 Connect the H and X leads to the TTR330 end only at this time With the clamps disconnected from the UUT connect the Bayonet Plug on the Cable labeled...

Page 19: ...described in Sections 2 and 3 F WARNING Ensure that the transformer to be tested is completely de energized Check every winding Ensure that all terminals of the transformer are disconnected from line...

Page 20: ...vy duty clamps marked X1 and X2 of the test lead to the corresponding low voltage winding terminals of the transformer under test Figures 4 1 and 4 2 show test setups for single phase transformers Fig...

Page 21: ...C and Australian standards are as shown in Table 4 1 Table 4 1 Test Lead Markings for Single Phase Transformers Test Lead Marking Transformer Heavy Duty Clamp Test Lead ANSI CEI IEC Australian Termina...

Page 22: ...ng clockwise rotation to the receptacles 3 Connect the heavy duty clamps marked H0 H1 H2 and H3 of the test lead to the corresponding high voltage winding terminals of the transformer under test Refer...

Page 23: ...numerical suffix of 4 Three Phase Three Winding Transformers This type of transformers has primary secondary and tertiary windings Primary and secondary windings are tested as a regular three phase tw...

Page 24: ...larity F WARNING Failure to observe proper connections will result in a safety hazard and may result in damage to the test set or CT Failure to observe voltage rating of low current X winding may resu...

Page 25: ...red to the Single and Three phase Transformer testing described in the previous sections 4 As shown in Figure 4 5 connect the heavy duty clamps marked X1 and X2 of the test lead to the respective H1 a...

Page 26: ...Section 3 2 Connect the H and X test cables to the respective H and X receptacles of the TTR330 Make sure that the connectors are securely fastened using clockwise rotation to the receptacles 3 Using...

Page 27: ...ure 4 9 shows how when mounted on a typical wye winding 1 With the ON OFF Switch in the OFF position make the circuit connections as described in Section 3 2 Connect the H and X test cables to the res...

Page 28: ...AVTMTTR330 Rev 3 March 2010 20 for delta winding configurations and figure 4 9 for wye winding configurations Figure 4 8 Setup for Testing BCT Mounted on Delta Winding on a Three Phase Power Transform...

Page 29: ...Connecting to the Transformer AVTMTTR330 Rev 3 March 2010 21 Figure 4 9 Setup for Testing BCT Mounted on Wye Winding of a Three Phase Transformer...

Page 30: ...hould be compared to the calculated turn ratio indicated in Table 4 3 Table 4 3 T type Transformer Winding Phase Relationship Winding Connection Winding Tested IEC Vector Group High Voltage Winding H...

Page 31: ...the ON OFF switch to the ON position and operate the test instrument as described herein F EMERGENCY SHUTDOWN For Emergency shutdown Push red EMERGENCY OFF button or toggle On OFF switch to OFF On pow...

Page 32: ...mer nameplate information to be entered before testing The test results displayed do not include either the calculated ratio per nameplate or ratio deviation values Full test This setup requires enter...

Page 33: ...5 2 Three Phase QUICK test Screen Select Recall to open test from memory either internal or USB memory Figure 5 3 File Manager Recall Test Use Navigation keys Arrows ENTER to select winding configurat...

Page 34: ...M AVTMTTR330 Rev 3 March 2010 26 Select SAVE to save test to memory Figure 5 4 File Manager SAVE Test screen Select PREFERENCES to set global parameters Figure 5 5 Global Settings Preferences screen...

Page 35: ...ample the LTC to the desired position and would then depress the remote control unit pushbutton for a short time then release it The pushbutton lamp extinguishes until the TTR is ready for the next te...

Page 36: ...ncorrect connection of the H and X leads The H and X leads have either been reversed or the test transformer connections or markings do not comply with the requirements of ANSI IEC or the Australian s...

Page 37: ...2010 29 3 Remove the Test Instrument clamps from the Transformer leaving the Safety Ground Jumper in place to drain any stored charge 4 Disconnect the Power Cord from the Input Power Source 5 Lastly d...

Page 38: ...M AVTMTTR330 Rev 3 March 2010 30 M...

Page 39: ...ry cloth taking care not to scratch the display screen cover Clean the cables and mating panel receptacles with isopropyl or denatured alcohol applied with a clean cloth Fuse Replacement The TTR330 is...

Page 40: ...M AVTMTTR330 Rev 3 March 2010 32 6 Replace fuse holder into housing 7 Swing and snap door back in place Install fuses on one side only do not install both AG and metric fuses at the same time...

Page 41: ...is readable at bottom note that when indicator pin is fixed successive voltages are selected by rotating the card 90 clockwise insert voltage selector card into housing printed side of card facing for...

Page 42: ...3 phase TTR calibration is performed on each new or repaired unit before sending it to a customer There is a special 3 phase TTR final calibration procedure which requires a NIST traceable test equipm...

Page 43: ...ion cause an impedance mismatch and as a result of the mismatch the displayed turns ratio reading is not exactly 1 1 as it may be expected A customer should be aware that a functional test is not a re...

Page 44: ...B and C should be RATIO 1 0000 0 0020 PHASE min 0 5 Iexc mA 0 0 to 0 5 8 If needed as identified on the Preference screen perform the test according to steps 1 through 7 for all the excitation voltage...

Page 45: ...Out of tolerance condition s in measurement circuit Red TEST VOLTAGE ON lamp does not light on start of testing Defective lamp EMERGENCY TEST OFF switch is not released Problem in measuring circuit On...

Page 46: ...e and recommends that its customers take advantage of this service for routine maintenance or in the event of any equipment malfunction In the event Service is required contact your Megger representat...

Page 47: ...bag for test leads 30915 211 Power supply cord 8 ft 2 5 m 17032 4 Ground lead 15 ft 4 6 m 4702 7 Test Leads For 3 phase connections shielded clamp end terminated H winding 10 ft 3 1 m X winding 10 ft...

Page 48: ...z 12 V dc to 120 V ac 50 Hz 12 V dc to 230 V ac 60 Hz 12 V dc to 230 V ac 50 Hz Test Leads For 1 phase connections shielded clamp end terminated H winding 10 ft 3 1 m X winding 10 ft 3 1 m For 3 phase...

Page 49: ...nstallation category II Protective Devices Fuses 2 Cat No TTR330 Type T 250 V 2 0 A IEC 127 designation Cat No TTR330 47 Type T 250 V 1 6 A IEC 127 designation High voltage and low voltage measurement...

Page 50: ...A 3 digit resolution Phase Angle Deviation 90 degrees 1 decimal point for the minutes display 2 decimal point for the degree display 2 decimal points for the centiradian display Accuracy Turn ratio 80...

Page 51: ...ay 8 4 inch full VGA color display Memory Storage Internal and USB memory device Over 1000 test results depending on size Interface Ethernet USB as host qty 2 Environmental Conditions Operating temper...

Page 52: ...M AVTMTTR330 Rev 3 March 2010 44 M...

Page 53: ...at are appropriate for specific Megger instruments PowerDB Lite detects the instrument and enables the appropriate form s Data can be entered on screen or captured directly while using the test instru...

Page 54: ...n test forms Use or modify one of our 200 built in test forms One step procedure to generate test reports with table of contents and deficiency summaries Allow all of your field test data to be integr...

Page 55: ...March 2010 47 Software Installation To install PowerDB Lite load the PowerDB Lite CD into your CD ROM drive and follow the on screen instructions 1 Accept the terms of the License agreement 2 Choose...

Page 56: ...M AVTMTTR300 Rev B Sept 2008 48 3 Select Default Settings 4 InstallShield Wizard will complete the installation of PowerDB Lite Click Finish to close the installation program...

Page 57: ...ommunicate do not check Use Ethernet if you are using a TTR 300 or TTR 310 Select the appropriate communication settings on the Serial Device Configuration screen Use the Refresh button to find any po...

Page 58: ...played on the instrument s Preferences screen e Then Click OK on the Instrument Setup Screen to finish 2 Open a New Form a Select the File New menu item or type CTRL N or press the New toolbar button...

Page 59: ...0 51 3 Enter Test Data a Header and nameplate information can be manually typed into a form b Click the Initialize Instrument button to initialize the test set c Form fields with automation will now b...

Page 60: ...he diagram can then be changed by entering a number in this field 2 Standard This enables you to choose between the ANSI Australian or IEC Standard 3 Test Voltage This enables you to choose the test v...

Page 61: ...reports repeat the notations and lists the page number where reported This allows the user to scroll to a particular page to view a reported anomaly For more information on features of PowerDB visit u...

Page 62: ...o the file you would like to open c Press the Open dialog button d If the file contains multiple test dates select the date that you would like to open for editing or select New to append a new set of...

Page 63: ...c To change the left logo press the button by the left logo path d The Open screen allows you to browse to a file location select a JPG or BMP file and press the Open button e Repeat steps c and d for...

Page 64: ...e Languages a Select the Tools Options menu item b Select the appropriate language in the dropdown menu 11 How to change units of measurement a Select the Tools Options menu item b Select the units in...

Page 65: ...found in the Help PowerDB Lite Help menu item Frequently Asked Questions FAQ s 1 Can I change the forms No You must have the full version of PowerDB to change forms 2 Can I synchronize forms to a data...

Page 66: ...ght arrow keys to select the low side winding configuration e Press the Enter or Tab key f Select the test voltage from the dropdown menu then press Enter or Tab g Type in the high side tap number and...

Page 67: ...ary or tertiary tap tested with the primary nominal tap 2 Test for each primary tap with the nominal secondary or tertiary tap If you do not wish to test all of the secondary or tertiary taps you can...

Page 68: ...M AVTMTTR300 Rev B Sept 2008 60...

Page 69: ...TTR330 Rev 3 March 2010 61 Operating Instructions for the 3PH TTR with TAP Changer Form The procedure for this form is the same as the Simple TTR form The only difference is that it allows the user to...

Page 70: ...M AVTMTTR300 Rev B Sept 2008 62 M...

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