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LTCA-10/LTCA-40 USER’S MANUAL

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5.8.5. Enabling the Computer Interface

The Computer Interface Mode is used to transfer test records from the LTCA-10/40’s Flash
EEPROM to a PC via the RS-232C or USB port. To use this mode, first run the provided PC
software and then connect the PC to the RS-232C or USB port on the LTCA-10/40. The software
will automatically make the connection to the LTCA-10/40.

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Summary of Contents for LTCA-10

Page 1: ...USER S MANUAL for the LTCA 10 LTCA 40 LOAD TAP CHANGER ANALYZER Vanguard Instruments Company Inc 1520 S Hellman Ave Ontario California 91761 TEL 909 923 9390 August 2015 FAX 909 923 9391 Rev 2 3...

Page 2: ...luding test preparation test lead connection actual testing and test lead disconnection SAFETY WARNING AND CAUTIONS The LTCA 10 40 shall be used only by trained operators All transformers under test s...

Page 3: ...5 1 Typical Connections to a Load Tap Changer LTC 15 5 2 Cable Connections 16 5 3 General Procedures 19 5 4 Performing a Resistance Test 20 5 4 1 Resistance Test Result Printouts 27 5 5 Performing a...

Page 4: ...ng Test Report Printout 27 Figure 9 0 Typical Dual Reading Test Report Printout 27 Figure 10 0 Typical Single Reading Test Report Printout 28 Figure 11 0 Typical Single Reading Test Report Printout 34...

Page 5: ...o OPTION 1 OPTION 2 OPTION 3 VENTIO the followin on the LTCA e referenced u names are r D screen out es are indica arning mess are indicated ote details 1 2 3 ONS USE g convention A 10 40 is in as MEN...

Page 6: ...10 40 is rugged portable and easy to use requiring little training for first time users A 16 key membrane keypad is used to control the unit The LTCA 10 40 features a back lit LCD screen 64 x 128 dot...

Page 7: ...he transformer at the end of each test 1 3 Furnished Accessories The LTCA 10 40 is furnished with eight 50 foot test cables with quick disconnect type test plugs on the unit end and battery type clamp...

Page 8: ...8 ONS ons CA 10 Speci anger analyzer x 17 D 53 cm ac 50 60 Hz 500 ohms micro ohms 0 i ohms 1 re s 1 5 readin resistance read amperes 10 a rrent sensor 1 Screen 64 x 1 els e thermal printe ash drive in...

Page 9: ...yzer H x 20 D 63 5 c ac 50 60 Hz 500 ohms micro ohms 0 i ohms 1 re s 1 5 readin resistance read amperes 10 a rrent sensor 1 Screen 64 x 1 els e thermal printe ash drive interfa not included C port One...

Page 10: ...enced to a functional description in Table 3 0 The table describes the function of each item on the control panel The purpose of the controls and indicators may seem obvious but users should become fa...

Page 11: ...user to change the Load Tap Changer position using the RAISE and LOWER buttons 10 DISCHARGE Red LED indicator light When lit this indicator warns the operator that the LTCA 10 is discharging the store...

Page 12: ...ctional description in Table 4 0 The table describes the function of each item on the control panel The purpose of the controls and indicators may seem obvious but users should become familiar with th...

Page 13: ...esults 9 LTC Control Load Tap Changer Control Allows the user to change the Load Tap Changer position using the RAISE and LOWER buttons 10 DISCHARGE Red LED indicator light When lit this indicator war...

Page 14: ...key To retract the LTCA 10 40 printer paper press and release the PAPER Contrast key 4 4 LTCA 10 40 Printer Paper The LTCA 10 40 s built in thermal printer uses 4 5 inch wide thermal paper for printi...

Page 15: ...prompts However first time operators should review the following operating procedures to become familiar with all LTCA 10 40 operations and the logical branching for various test options More experie...

Page 16: ...nnect gh current is lt in electric A 10 40 Conn always disco idental flash LT 16 any test lea s being cond cal shock to nection Diag onnect test c h over TCA 10 LT ad that is con ducted durin personne...

Page 17: ...LTCA 10 LTCA 40 USER S MANUAL 17 Figure 5 0 Typical LTCA 40 Connection Diagram 2 Windings...

Page 18: ...LTCA 10 LTCA 40 USER S MANUAL 18 Figure 6 0 Typical LTCA 40 Connection Diagram 3 Windings...

Page 19: ...er cable in s and voltage to the transf 0 power by p on the unit hort start up me will obvi 03 04 0 09 28 0 LT 19 n ground It CA 10 40 to rmer bushing 0 nto a power o e sensing cab former termi pressi...

Page 20: ...elect the test current by pressing the 1 2 3 or 4 LTCA 40 only key e The CONVERT READINGS TO STANDARD TEMP menu will be displayed as shown below 1 YES If you wish to convert readings to standard tempe...

Page 21: ...rast and Press the EN TEMP 85 0 F mp pt EMP 77 0 F mp pt Tk 230 adjust T R to acc LT 21 elect copper elect aluminu manually ente Tk value by t key You g the PAPE firm your tem rt readings t ep h the D...

Page 22: ...CUR IF DISCONN 40 will calcu NG screen w e operator th to proceed to nus will be d channels we ors or would he START U to run the tes ING AIT 3 TEST EST UN TEST ABORT ONLY EST UN TEST ABORT G ASH OVER...

Page 23: ...10 enient for sto on is an LTC uired For ex stable press osition and s ey This proc ressed the d shown below OGRESS EST S IZED OGRESS S IZED GING IT IZED LT 23 ternal calibra to remind the ends on th...

Page 24: ...een will be printed Typical LTCA 10 40 test reports are shown in Figure 7 0 Figure 8 0 and Figure 9 0 Continue to step m 2 NO Press the 2 key NO to bypass the printing of the test results Continue to...

Page 25: ...th h to run anot ORD menu d must be sav er time D T ATA IN BU REV DATA EV DATA LT 25 displayed if current test r ppend the ne ng as the un memory you wn above Pre sults in the w ults and disca TER key...

Page 26: ...E REC ve the record h to save the displayed DO NOT SA be returned t SAVE REC will be displa mber is autom to return to t 1 RE BE LOST AVE RECO ORD LT 26 d press the e record pres SAVE RECOR to the STA...

Page 27: ...LTCA 10 LTCA 40 USER S MANUAL 27 5 4 1 Resistance Test Result Printouts Figure 7 0 Typical Triple Reading Test Report Printout Figure 8 0 Typical Dual Reading Test Report Printout...

Page 28: ...LTCA 10 LTCA 40 USER S MANUAL 28 Figure 9 0 Typical Single Reading Test Report Printout...

Page 29: ...g key 1 2 or 3 d The ENTER SPECIAL TEST TIME MINUTES screen will be displayed Enter the test time between 1 45 minutes using the keypad on the LTCA 10 40 and then press the ENTER key Ten 10 minutes is...

Page 30: ...ER Contrast key You can decrease the Tk value by 0 5 C increments by pressing the PAPER Contrast key Press the ENTER key to confirm your temperature selection Continue to step g 2 NO If you do NOT wis...

Page 31: ...and Press the EN 40 will calcu NG screen w e operator th ss the ENT nus will be d channels we ors or would he START U 3 TEST EST UN TEST ABORT ONLY EST UN TEST ABORT G ASH OVER F CABLES ECTED TEMP 85...

Page 32: ...PLEASE WA to run the tes nishes its int onal screen t message depe s this delay instructions ines when th CD as follow t time has el f resistance v c ORD menu D S 10 00 S IZED GING IT IZED ING AIT LT...

Page 33: ...sav er time ve the record h to save the displayed DO NOT SA be returned t SAVE REC will be displa mber is autom to return to t 1 RE BE LOST AVE RECO ORD LT 33 ved to Flash d press the e record pres SA...

Page 34: ...LTCA 10 LTCA 40 USER S MANUAL 34 5 5 1 Special Resistance Test Result Printout Figure 10 0 Typical Single Reading Test Report Printout...

Page 35: ...TEST XFMR to start a test b The following menu will be displayed Press the 3 key DYNAMIC LTC TEST to start a dynamic LTC test c The following menu will be displayed Select the shot time by pressing th...

Page 36: ...n will be displayed momentarily After the LTCA 10 40 finishes its internal calibration the XFMR CHARGING screen will be displayed This is only an informational screen to remind the operator that a tes...

Page 37: ...psed or the STOP key is pressed the PRINT TEST RESULTS menu will be displayed 1 YES Press the 1 key YES to print the test results on the built in thermal printer The following menu will be displayed 1...

Page 38: ...menu will be displayed Select the resistance plot range by pressing the corresponding key on the LTCA 10 40 s keypad 1 2 3 4 5 or 6 The printer will begin the print the expansion plot A time expansio...

Page 39: ...ORD menu d must be sav er time ve the record h to save the displayed DO NOT SA be returned t SAVE REC will be displa mber is autom to return to t 1 RE BE LOST AVE RECO ORD D LT 39 u will be disp ved...

Page 40: ...LTCA 10 LTCA 40 USER S MANUAL 40 5 6 1 Dynamic LTC Test Result Printouts Figure 11 0 Sample Normal Dynamic LTC Test Plot...

Page 41: ...LTCA 10 LTCA 40 USER S MANUAL 41 Figure 12 0 Sample Dynamic LTC Test Expansion Plot...

Page 42: ...or 4 LTCA 40 only key c The following WARNING screen will be displayed This warning reminds the operator that the next sequence of test steps will run current through the test load Press the ENTER key...

Page 43: ...CA 40 USER S MANUAL 43 e The V1 V2 and V3 test currents will be displayed as shown below Press the STOP key to end the diagnostic test and return to the START UP menu V1 07 53mV V2 08 23mV V3 09 12mV...

Page 44: ...ssing it a s er B Press ey one more selected are ontrast ke Contrast roneously en UP menu P be displayed R XFMR ID n will be dis y s name by key T RECORD 03 04 0 09 28 0 LT 44 CA 10 40 an for accessin...

Page 45: ...er name by using the LTCA 10 40 s alpha numeric keypad and then press the ENTER key g The MODEL screen will be displayed Enter the transformer model name number by using the LTCA 10 40 s alpha numeric...

Page 46: ...CA 10 40 s alpha numeric keypad and then press the ENTER key j The OPERATOR screen will be displayed Enter the name of the operator by using the LTCA 10 40 s alpha numeric keypad and then press the EN...

Page 47: ...RE RECORD menu will be displayed 1 ENTER RECORD NUMBER Press the 1 key if you know the record number The following screen will be displayed Enter the record number using the LTCA 10 40 s keypad and th...

Page 48: ...esired record The RESTORING RECORD screen will be displayed momentarily Continue to step e e Once a record has been restored the following screen will be displayed 1 YES Press the 1 key YES to print t...

Page 49: ...LTCA 10 LTCA 40 USER S MANUAL 49 Figure 13 0 Typical Test Record Printout...

Page 50: ...to print the entire directory of test records After the directory is printed the display will return to the START UP menu A typical directory printout is shown in figure 14 0 2 SHORT DIRECTORY Press t...

Page 51: ...LTCA 10 LTCA 40 USER S MANUAL 51 Figure 14 0 Typical Record Directory Printout...

Page 52: ...RASE RECORD menu will be displayed Press the STOP key if you would like to end the process and return to the START UP menu Otherwise select one of the menu options described below 1 ERASE SINGLE RECOR...

Page 53: ...l records stored in the LTCA 10 40 s memory The following confirmation screen will be displayed Press the STOP key to cancel the process and return to the START UP menu Press the ENTER key to erase al...

Page 54: ...e is used to transfer test records from the LTCA 10 40 s Flash EEPROM to a PC via the RS 232C or USB port To use this mode first run the provided PC software and then connect the PC to the RS 232C or...

Page 55: ...key SET TIME c The following screen will be displayed Type in the Date and Time using the alpha numeric keypad When the complete date and time has been typed in the display will immediately return to...

Page 56: ...the START UP menu Press the 2 key SETUP b The following menu will be displayed Press the 5 key SET FONT c The SELECT TEST FONT menu will be displayed 1 NORMAL FONT Press the 1 key NORMAL FONT to sele...

Page 57: ...sults immediately To bypass this delay press the 9 key the 8 key and the 7 key from the START UP menu The LTCA 10 40 will then begin displaying resistance values as soon as measurements are made This...

Page 58: ...S MANUAL 58 1520 S Hellman Ave Ontario CA 91761 USA Phone 909 923 9390 Fax 909 923 9391 www vanguard instruments com LTCA 10 40 User s Manual Version 2 3 August 24 2015 Copyright 2015 by Vanguard Ins...

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