Models ATRT-01, ATRT-01B, and ATRT-01D
Contents
1. OPERATING INSTRUCTIONS for Models ATRT 01 ATRT 01B and ATRT 01D Single Phase Transformer Turns Ratio Meter ATRT 01 Automatic Transformer Ratio Tester Ww Vanguard Instruments Co Inc A Ontario California USA ATRT 01B Automatic Transformer Ratio Toster Vanguard Instruments Co Inc Ontario California USA ATRT 01D Automatic Transformer Ratio Tester Heke OY Vanguard Instruments Co Inc x 1710 Grevillea Court Ontario California 91761 TEL 909 923 9390 May 2002 FAX 909 923 9391 REV 02 Model ATRT 01 v Operating Instructions NOTICE This manual applies to Models ATRT 01 ATRT 01B and ATRT 01D the operating procedures are virtually the same for all models any differences which relate to the test units power sources are clearly described within the step by step procedures SAFETY WARNINGS AND CAUTIONS This device shall be used only by trained operators All transformers under test shall be off line and fully isolated Do not Service or Test alone Do not perform test procedures or service unless another person is also present who is capable of rendering aid and resuscitation Do Not Modify Test Equipment Because of the added risk of introducing additional or unknown hazards do not install substitute parts or perform any unauthorized modification to any Model ATRT 01 Test unit To ensure that all designed safety features are maintained it is recommended tha2. ransformer pla 2 NO voltage Start test SINGLE PHASE XFMR Press START key START TO RUN TEST OR STOP TO ABORT Display ratio excitation RATIO mA DIFF 1 000 0002 Rev 02 May 02 2002 24 Model ATRT 01 v Operating Instructions 25 2 Single Phase Transformer Test Procedure using nameplate voltages Table 25 2 shows the steps to test a single phase transformer with transformer name plate voltages Table 25 2 Single Phase Transformer Test with name plate voltages Procedure STEP DESCRIPTION DISPLAY ACTION 1 Initiate Transformer Test 1 TEST XFMR 04 12 00 Press key 1 2 13 06 00 3 CALCULATOR Select Single Phase ene pees Press key 1 3 Y dT 4 dT dT 5 Y Y 3 Select to use transformer T ME OE PLATE VLTG Press key 1 late volt E name plate voltage SNO 4 Enter line voltage ENTER H WINDING Use keys 0 9 NAME PLATE VOLTAGE V 5 Confirm H line voltage ENTER H WINDING Press ENTER NAME PLATE VOLTAGE 7200 V Enter X line voltage ENTER X WINDING Use keys 0 9 NAME PLATE VOLTAGE V T Confirm X voltage ENTER X WINDING Press ENTER NAME PLATE VOLTAGE 480 V Start Test SINGLE PHASE XFMR Press START START TO RUN TEST OR STOP TO ABORT Display ratio excitation RATIO mA DIFF None current and percentage 15 003 01 00 0 02 error Rev 02 May 02 2002 25 Model ATRT 01 v Operating Instructions 25 3 Three Phase Transformer Test Procedure using nameplate volt
3. ATRT 01D Automatic Transformer Ratio Tester ARNING DO NOT TOUCH OR REMOVE TRANSFORMER RS 232C 2 3 G START ABC DEF TEST CABLES DURING TESTING FAILURE TO HEED THIS WAPNING CAN CAUSE LETHAL SHOCK AND EQUIPMENT DAMAGE 7 9 CONTRAST PRS TUV WXY ENTER 0 CLEAR STOP Vanguard Instruments Co Inc m Ontario California USA Figure 9 0 Model ATRT 01D Front Panel Controls Indicators and Connectors Fig 9 2 Panel Markings Functional Description lt RS 232C Computer Interface port 9 pin female DB type connector This RS 232C interface port allows the ATRT 01D to interface with an IBM computer Data rate is set to 19 200 baud 1 start bit 8 data bits 2 stop bits and no parity bit PIN SIGNAL 2 3 Rx 5 Gnd None display Liquid Crystal Display LCD 4 line by 20 character screen backlighted sunlight readable Displays menus test results and status readouts 3 None H amp X High voltage and Low voltage connector 16 pin male connector None Keypad Pushbutton operating controls 16 keys POWER Power Switch Momentary Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions 10 0 ATRT 01 Power Switch Configurations 10 1 ATRT 01 Power Turn On Off The ATRT 01 is powered by ac line voltage only The power is turned on and off with a power switch that is built into the power receptacle see item 4 of Figure 7 0 10 2 ATRT 01B Power Turn
4. Front Panel Controls Indicators and Connectors 7 Figure 8 0 Model ATRT 01B Front Panel Controls Indicators and Connectors 8 Figure 9 0 Model ATRT 01D Front Panel Controls Indicators and Connectors 9 Figure Start up MENU ttp e picem c Ma nr 12 Figure 16 1 ATRI 0I Menu Diagram ies deo iir pa ee paci qe tret Dive iat denen 13 Figure 17 0 Transformer Selection menu iecur rds i ea ae ee dee dina 15 Figure 18 0 Nameplate Voltage Selection Menu 16 Figure 19 1 H Winding Voltage Entry 17 Figure 19 2 H Winding Voltage Entry Display eene eene 17 Figure 19 3 X Winding Voltage Entry Display eene eene 17 Figure 19 4 X Winding Voltage Entry 17 Pieure 20 0 Start Test ceat inim tbt etes 19 Figure 21 0 Nest Result DISDlay tubo dateien deron ue uid 20 Figure 22 0 Cable Connection eot ttd e ple eo Ie eps 21 Figure 23 0 Time Date Display 22 Figure 24 0 Select Computer Interface Display sene 23 Figure 25 4 OwuicE Test Menu et oe ton 28 Figure 25 5A Pr
5. appear if the user select YES key 1 on the Voltage selection screen see Figure 18 0 c Action Option Press keys 0 thru 9 to enter transformer voltages Press ENTER to confirm voltage entry Press CLEAR key to re enter input Rev 02 May 02 2002 18 Model ATRT 01 v Operating Instructions 20 0 Start Test Menu SINGLE PHASE XFORMER START TO RUN TEST OR STOP TO ABORT Figure 20 0 Start Test Screen a Description This menu allows the user to start or abort a test b Origin After the user enters the nameplate voltages see Figure 19 4 or selects NO on the XFMR NAME PLATE VLTG Screen see Figure 18 0 c Action Option Press START to start the test and press STOP to abort the test Rev 02 May 02 2002 19 Model ATRT 01 v Operating Instructions 21 0 Transformer Turns Ratio Test Result Display RATIO mA DIFF 1 003 0002 0 3 Figure 21 0 Test Result Display a Description The ATRT 01 displays the transformer turns ratio excitation current in milliamps and turns ratio error percentage A typical turns ratio test result screen is shown on Figure 21 0 above Note Ratio displayed 1 003 Polarity displayed in phase Excitation current 2 ma Percentage error 0 3 b Origin This screen is displayed after the user presses START from the Start Test Menu c Action Option Press any key to return to the start up menu Figure 16 0 Rev 02 May 02 2002 20 Mo
6. cable connection Start phase C test Observe phase C test results RATIO mA DIFF 15 003 001 0 02 15 015 001 0 10 ENTER TO CONTINUE CABLE PHS B XFMR 1 2 to X3 H1 H2 to H3 H1 START TO RUN TEST CABLE PHS C XFMR X1 X2 to H1 H2 to H3 H2 START TO RUN TEST RATIO mA 15 003 001 15 015 001 15 000 001 None Connect cables Press START Rev 02 May 02 2002 27 Model ATRT 01 v Operating Instructions 25 4 ATRT 01 Quick Test Mode The Quick Test mode allows the user to measure transformer turn ratio with a single button command To initiate the test press and hole the START key for one second then release The 01 will display the message below on the LCD QUICK TEST HOLD START KEY UNTIL BEEP FOR QUICK TEST Figure 25 4 Quick Test Menu 25 5 Test Single Phase Transformer Using Preset Voltage Table This special mode allows the user to quickly test a single phase transformer ratio and compare it s reading against a name plate voltage There are 46 transformer name plate voltages pre program in the ATRT 01 To access this mode press CLEAR key from the main menu Fig 16 0 the 01 will display the following message SCROLL TO SELECT START TO RUN TEST H 2 400 X 240 Figure 25 5A Preset Voltage Menu To select different name plate voltages use the up or down arrow keys 2 To initiate a test press the START key A typi
7. 2 Model 01 Operating Instructions 8 0 ATRT 01B Operating Control And Indicators SERIAL MADE IN U S A ATRT 01B Automatic Transformer Ratio Tester WARNING DO NOT TOUCH OR REMOVE TRANSFORMER EST CABLES DURING TESTING FAILURE TO HEED THIS WARNING CAN CAUSE LETHAL SHOCK AND EQUIPMENT DAMAGE 120Vac 1A 60Hz Fuse 250Vac 1A Fast Blow 7 8 9 CONTRAST o ens 4 Vanguard Instruments Co Inc at Ontario California USA 6 5 4 Figure 8 0 Model ATRT 01B Front Panel Controls Indicators and Connectors Fig 8 0 Panel Markings Functional Description Index RS 232C Computer Interface port 9 pin female DB type connector This RS 232C interface allows ATRT 01B to interface with an IBM computer Data rate is set to 19 200 baud 1 start bit 8 data bits 2 stop bits and no parity bit PIN SIGNAL 2 Tx 3 Rx 5 Gnd lt eee LCD 4 line by 20 character screen backlighted sunlight Displays menus test results and status readouts None amp X High voltage and Low voltage connector 16 pin male 120 220Vac 1A Input power connector with third wire safety ground 50 60Hz None Keypad Pushbutton operating controls 16 keys 6 POWER Power Switch Momentary contact Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions 9 0 ATRT 01D Control And Indicators 1 2 8 SERIAL MADE IN U S A
8. 2 15 Model 01 Operating Instructions 18 0 Transformer Voltage Selection XFMR NAME PLATE VLTG 1 YES 2 NO Figure 18 0 Nameplate Voltage Selection Menu a Description This menu allows the operator to use the transformer nameplate voltages to derive a calculated turns ratio This calculated turns ratio is then used to compare with the measured turns ratio which produces an error difference percentage b Origin This menu is displayed after the operator selects the transformer type to be tested c Action Option Press key 1 yes to use the calculated ratio in the test results Press key 2 no to bypass this option Rev 02 May 02 2002 16 Model ATRT 01 v Operating Instructions 19 0 Transformer Voltage Data Entry Menu ENTER H WINDING NAME PLATE VOLTAGE V Figure 19 1 H Winding Voltage Entry Display ENTER H WINDING NAME PLATE VOLTAGE 7200V Figure 19 2 H Winding Voltage Entry Display ENTER X WINDING NAME PLATE VOLTAGE V Figure 19 3 X Winding Voltage Entry Display ENTER X WINDING NAME PLATE VOLTAGE 480V Figure 19 4 X Winding Voltage Entry Display Rev 02 May 02 2002 17 Model ATRT 01 v Operating Instructions a Description This menu allows the user to enter the H and X voltages of the transformer to be used in the turns ratio calculation The user must enter the transformer nameplate line voltages b Origin H and X voltage data entry menu will
9. B Power 10 10 3 ATRT O1D Power Turn On Off 10 11 0 ATRT 01B Ch rgert ndieator ona ne Hio Me evi tiom t tutis pM 10 IZ ATRT OT E CD COnttOl nosque Qe HH ovo spero 10 12 Contrast Contre essc re Re tri tete dipl e e Ms ae 10 12 2 Display Back lig ht asini ete i eaten bb 10 13 0 ATRT 01 5 232 Computer Control port 10 14 0 IBM PC Transformer Analysis Software sese 10 15 0 ATRT 0L Battery replacement italian 11 15 1 01 Battery 11 15 2 01 Battery 1 11 16 0 DISPLAY and MENU DESCRIPTIONS tct pet nre tena bee epe aoro eap dia dps 12 16 1 Statt U pe Mets antea 12 Transformer P 15 18 0 Transformer Voltage Selection eese tras eet 16 19 0 Transformer Voltage Data Entry ee east ol ete dete tae ero 17 20 0 Start Test Meme eoe ae 19 21 0 Transformer Turns Ratio Test Result Display eene 20 22 0 Three Phase Transformer Test Cable Connection Display 2 23 0 Set Time and 22 24 0 En
10. DIFF 1 002 0109 0 02 ENTER TO CONTINUE CABLE PHS B XFORMER X1 X2 to X2 XO H1 H2 to H2 HO START TO RUN TEST CABLE PHS B XFORMER X1 X2 to X2 X1 H1 H2 to H2 H 1 START TO RUN TEST CABLE PHS B XFORMER X1 X2 to H2 H1 H2 to H2 START TO RUN TEST CABLE PHS B XFMR X1 X2 to X2 H1 H2 to H2 H1 START TO RUN TEST r ERROR F SCALE METER RANGE 0C66h REPEAT TEST 1 YES 2 NO Y TO Y XFORMER PLEASE WAIT TEST INPROGRESS DELTA TO DELTA XFORMER PLEASE WAIT TEST IN PROGRESS Y TO DELTA XFORMER PLEASE WAIT TEST IN PROGRESS DELTA TO Y XFORMER PLEASE WAIT TEST IN PROGRESS RATIO mA DIFF 1 002 0109 0 02 1 003 0107 0 03 ENTER TO CONTINUE RATIO DIFF 1 002 0109 0 02 1 003 0107 0 03 ENTER TO CONTINUE RATIO DIFF 1 002 0109 0 02 1 003 0107 0 03 ENTER TO CONTINUE RATIO mA DIFF 1 002 0109 0 02 1 003 0107 0 03 ENTER TO CONTINUE CABLE PHS C XFMR X1 X2 to X3 XO H1 H2 to HO START TO RUN TEST CABLE PHS C XFMR X1 X2 to X2 H1 H2 to H3 H2 START TO RUN TEST CABLE PHS C XFORMER X1 X2 to X3 XO H1 H2 to H3 HO START TO RUN TEST CABLE PHS C XFORMER X1 X2 to H 1 H2 to H3 H2 START TO RUN TEST Y TO Y XFORMER PLEASE WAIT TEST IN PROGRESS DELTA TO DELTA XFORMER PLEASE WAIT TEST IN PROGRESS Y TO DELTA X
11. FORMER PLEASE WAIT TEST IN PROGRESS DELTA TO Y XFORMER PLEASE WAIT TEST IN PROGRESS RATIO mA DIFF 1 002 0109 0 02 1 003 0107 0 03 1 000 0125 0 00 CONTINUE RATIO mA DIFF 1 002 0109 0 02 1 003 0107 0 03 1 000 0125 0 00 ENTER CONTINUE DIFF 0109 0 02 0107 0 03 0125 0 00 ENTER TO CONTINUE REPEAT TEST 1 YES 2 NO RATIO mA DIFF 1 002 0109 0 02 1 003 0107 0 03 1 000 0125 0 00 ENTER CONTINUE RETURN TO NAMEPLATE VLTG MENU RETURN TO START UP MENU YES RETURN TO XFMR NAMEPLATE MENU RETURN TO XFMR START UP MENU Rev 02 May 02 2002 14 Model ATRT 01 v Operating Instructions 17 0 Test Transformer Selection XFMR CONFIGURATION 1 SNGL PHS 2 dT Y 2 Y dT 4 dT dT 5 Y Y Figure 17 0 Transformer Selection menu a Description This menu allows the user to select a particular transformer to be tested If the user selects a three phase transformer the ATRT 01 will display hookup instructions ATRT 01 cables to the transformer terminal bushing for phases A B and C b Origin XFORMER CONFIGURATION menus display as a result of pressing key 1 from the start up menu see Figure 16 0 c Action Option Press key 1 2 3 4 or 5 depending upon the transformer configuration to be tested Press STOP to return to the start up menu Rev 02 May 02 200
12. On Off The ATRT 01B is turned on or off by pressing POWER see item 6 on Figure 8 0 on the front panel for 2 seconds then releasing the switch 10 3 ATRT 01D Power Turn On Off The ATRT 01D is turned on or off by pressing the POWER switch see item 5 on Figure 9 0 on the front panel for 2 seconds then releasing the switch 11 0 ATRT 01B Charger Indicator The CHARGE indicator is an LED that lights while the ATRT 01B battery is charging 12 0 ATRT 01 LCD Control 12 1 Contrast Control To Darken the LCD display press and hold the Contrast switch for two seconds to lighten the LCD display press and hold the Contrast switch for two seconds 12 2 Display Back light Control The ATRT 01 display is back lighted This light turns off after 30 seconds of operation to conserve power To re light the display press any key on the keypad 13 0 ATRT 01 RS 232C Computer Control port The 01 be controlled remotely via an RS 232C port The ATRT 01 computer control must be enabled before it can be controlled via the RS 232C port Refer to paragraph 24 0 for procedures to enable the interface control 14 0 IBM PC Transformer Analysis Software IBM PC Transformer Analysis Software is delivered with each 01 This software allows the user to test transformer turns ratio via a Test results may be saved and run later in a shop or an office environment Such test result records may also be saved in any user spec
13. R HEV ENTER X WINDING NAMEPLATE VOLTAGE RATIO X XXX DELTA TO Y XFORMER POWER STATUS ICON Hu X titt v RATIO X XXX Bat E as ce Y TO DELTA XFORMER RETURNTO Bat START UP Bat 2 2 3 CHARGE MENU Bat FULLY CHARGED DELTA TO DELTA XFORMER H HEV X Y TOY XFMR H HEE X RATIO X XXX Vanguard Instrument Co Inc Ontario California USA Rev 02 May 02 2002 13 Model ATRT 01 v Operating Instructions 10 CABLE PHS A XFORMER X1 X2 to X1 H1 H2 to H1 HO START TO RUN TEST CABLE PHS A XFORMER X1 X2 to X1 H1 H2 to H1 START TO RUN TEST CABLE PHS A XFORMER X1 X2 to X1 X2 H1 H2 to H1 START TO RUN TEST CABLE PHS A XFORMER X1 X2 to X1 H1 H2 to H1 START TO RUN TEST SINGLE PHASE XFORMER PLEASE WAIT TEST IN PROGRESS Y TO Y XFORMER PLEASE WAIT TEST IN PROGRESS DELTA TO DELTA XFORMER PLEASE WAIT TEST IN PROGRESS Y TO DELTA XFORMER PLEASE WAIT TEST IN PROGRESS DELTA TO Y XFORMER PLEASE WAIT TEST IN PROGRESS RATIO mA DIFF 1 002 0119 0 02 RATIO DIFF 1 002 0109 0 02 TO CONTINUE RATIO mA DIFF 1 002 0109 0 02 ENTER TO CONTINUE RATIO mA DIFF 1 002 0109 0 02 ENTER TO CONTINUE RATIO mA
14. able Computer 2 3 i 23 25 0 Step by Step Turns Ratio Testing gt 24 25 1 Single Phase Transformer Test 0 24 25 2 Single Phase Transformer Test Procedure using nameplate voltages 25 25 3 Three Phase Transformer Test Procedure using nameplate voltages 26 25 4 01 Quick Test En SE i 28 25 5 Test Single Phase Transformer Using Preset Voltage Table 28 Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions List of Tables Table 5 1 Model ATRT 01 v Turns Ratio Meter Specifications 5 Table 5 2 ATRT 01 ATRT 01B and ATRT 01D Cable 5 6 Table 6 1 Cable Markings and Identification 6 Table 25 1 Single Phase Transformer Test 24 Table 25 2 Single Phase Transformer Test with name plate voltages Procedure 25 Table 25 3 EhreesPhase Transformer Test Procedure 26 List of Figures Figure 7 0 Model 01
15. ages Table 25 3 shows the steps to test a three phase transformer Table 25 3 Three Phase Transformer Test Procedure DESCRIPTION DISPLAY ACTION Initiate Transformer Test 1 TEST XFMR 04 12 00 Press key 1 2 13 06 00 3 CALCULATOR Select Delta to Y Phase Press key 2 3 Y dT 4 dT dT 5 Y Y 3 Select to use transformer name NES ee PLATE VLTG Press key 1 late volt plate voltage S NO 4 Enter H line voltage ENTER H WINDING Use keys 0 9 NAME PLATE VOLTAGE V 5 Confirm H voltage ENTER H WINDING NAME PLATE VOLTAGE 7200 V Enter X line voltage ENTER X WINDING Use keys 0 9 NAME PLATE hc ou 7 Confirm X voltage ENTER X WiNDING Press ENTER NAME PLATE VOLTAGE 480 V ATRT 01 display phase A cable CABLE PHS A XFMR Connect cables connection 1 2 to 1 0 H1 H to H1 H3 START TO RUN TEST Start phase A test CABLE PHS A XFMR Press START X1 X2 to X1 H1 H2 to H1 H3 START TO RUN TEST 10 Observe phase A test results RATIO mA DIFF None 15 003 001 0 02 ENTER TO CONTINUE 01 display phase cable CABLE PHS B XFMR Connect cables connection X1 X2 to X2 X0 H1 H2 to H2 H1 START TO RUN TEST Start phase B test CABLE PHS B Press START X1 X2 to X2 H1 H2 to H2 H1 START TO RUN TEST Rev 02 May 02 2002 26 Model 01 Operating Instructions DESCRIPTION DISPLAY ACTION Observe phase B test results 01 display phase
16. ated each specification is the same for all three ATRT 01 models Type Size inches Weight pounds Turns Ratio Measuring Ranges Turns Ratio Accuracy Calibration Excitation Voltage Excitation Current Current Accuracy Winding Polarity Display Serial Interface Portable Automatic Single Phase Transformer Turns Ratio Meter 12 L by 8 W by 9H ATRT 01 8 ATRT 01B 9 5 ATRT 01D 9 5 0 800 to 15 000 00 0 8 999 0 1 1 000 1 499 0 2 1 500 1 999 1 0 96 2 000 15 000 2 0 Self Calibrating No operator calibration required ATRT 01 40 Volts ac ATRT 01B ATRT 01D 20 Volts ac ATRT 01 2 amps ATRT 01B ATRT 01D 0 to 200 milliamperes 2 of Reading 1 Digit Displayed on LCD screen LCD 20 Characters wide by 4 Lines viewable in bright sunlight RS 232C 19200 baud 8 data bits 2 start bits 1 stop bit Temperature Operating 20 C to 55 C Storage 40 C to 65 C Warranty One Year on Parts and Labor Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions Table 5 2 ATRT 01 ATRT 01B and ATRT 01D Cable Set lien Test Lead Cable 15 foot Single Phase Connections Power Cord Note 1 RS 232C Cable Note 1 The ATRT 01D requires no power cord 2 A Canvas Cable Carrying Bag is included with the cable set 6 0 Cable Marking and Identification Both H and cable test leads are terminated with heavy duty battery clips Test cables are identified as follows Tab
17. cal test result is shown below M RATIO 10 001 ERROR 0 11 PASS TTR TEST 2 400 240 Rz10 00 Figure 25 5B Test Result Menu Note In order to have the PASS TTR TEST message display the reading error should be less or equal to 0 5 and the winding should be in phase Rev 02 May 02 2002 28 Model ATRT 01 v Operating Instructions APPENDIX A TABLE OF TEST CONFIGURATION amp CALCULATION FORMULAS TRANSFORMER CONFIGURATION CONFIGURATION HIGH VOLTAGE LOW VOLTAGE WINDING CH WINDING OO HIGH LOW VOLTAGE VOLTAGE WINDING WINDING 35 v 2 10 T A B A B C A B A A B A B A B A B Rev 02 May 02 2002 29 Vanguard Instruments Company Inc 1710 Grevillea Court Ontario CA 91761 USA Phone 909 923 9390 Fax 909 923 9391 Website http www vanguard instruments com Rev 01 May 02 2000
18. citation voltage to primary windings and monitors secondary X winding voltage The users can also test 3 phase transformers using the ATRT 01 The user is required to connect the H and X cable leads to the appropriate windings for each phase Since the ATRT 01 test lead connections to the 3 phase transformer bushings are different for each phase the ATRT 01 simplifies this procedure by displaying hook up instructions on the LCD screen as testing progresses The ATRT 01 detects test lead hook ups for errors before a test The ATRT 01 applies a low level test voltage 300 mV across the winding being tested and senses the induced secondary voltages Any time an induced voltage is greater than the applied excitation voltage it s detected as a hookup error If a cross connection error is detected the ATRT 01 aborts the test and displays Hook Up Error But if no hookup error is detected the ATRT 01 applies a full 40 volt 20 volt for ATRT 01B 01D test voltage to the transformer being tested and the winding voltage ratio is displayed Excitation current in milliamperes and winding polarity are also displayed The ATRT 01 lets users enter nameplate voltages for the specified turns ratio calculation From this calculated turns ratio the ATRT 01 will calculate and display the percentage of difference based on the difference between the calculated and measured values A built in RS 232C port allows the ATRT 01 to interface with a
19. day year hour minute and second using key 0 9 Rev 02 May 02 2002 22 Model 01 Operating Instructions 24 0 Enable Computer Interface COMPUTER ITF MODE CAUTION CABLE MAY HAVE VLTG STOP TO ABORT Figure 24 0 Select Computer Interface Display a Description ATRT 01 testing can be remotely controlled via an IBM compatible PC through an RS 232C port In this mode the Transformer Analysis software provided with the 01 is used to test transformer windings b Origin On the Start up Menu see Figure 16 0 press key 2 SET UP then on the next display press key 2 COMPUTER CONTROL to show the COMPUTER ITF MODE display the 01 testing remains under computer control for as long as this screen displays c Action Option Press STOP to abort computer control and return to the Start up menu Rev 02 May 02 2002 23 Model ATRT 01 v Operating Instructions 25 0 Step by Step Turns Ratio Testing Procedures 25 1 Single Phase Transformer Test Procedure Table 25 1 shows the steps to test a single phase transformer Table 25 1 Single Phase Transformer Test Procedure STEP DESCRIPTION DISPLAY ACTION Initiate Transformer Test 1 TEST XFMR 04 12 00 Press key 1 2 SETUP 13 06 02 3 CALCULATOR Select Single Phase Press key 1 1 2 dT Trapsiprmer 3 Y dT 4 dT dT 5 Y Y Select not to use XFMR NAME PLATE VLTG Press key 2 1 YES t fi name plate
20. del ATRT 01 v Operating Instructions 22 0 Three Phase Transformer Test Cable Connection Display CABLE PHS A XFMR X1 X2 to X1 X0 H1 H2 to H1 H3 START TO RUN TEST Figure 22 0 Cable Connection Display a Description If a user is using the 01 to test a three phase transformer the transformer is tested one phase at a time The user must connect the ATRT 01 s H1 H2 and X1 X2 cable leads to the appropriate windings to produce turns ratio readings for phases A B and C The ATRT 01 displays the lead to bushing connection instruction for each phase By following the connection instruction the ATRT 01 will lead the user through phase A B and C testing This feature reduces the probability of any hook up error in the field b Origin Select a three phase transformer from the XFMR CONFIGURATION menu see Figure 17 0 c Action Option Connect the ATRT 01 test leads to the transformer bushings then press START to run test Rev 02 May 02 2002 21 Model 01 Operating Instructions 23 0 Set Time and Date ENTER MM DD YY HH MM SS Figure 23 0 Time and Date Display a Description The 01 has a real time clock powered with a back up battery The ATRT 01 displays the current time and date in the upper right of the start up menu screen see Figure 16 0 b Origin Press key 2 SET UP on the start up menu Figure 16 0 and press 1 SET TIME c Action Option Enter month
21. eset Voltage Menu ipee 28 Ligure 23 5B Menu s uie tore Ne ete 28 Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions 1 0 Introduction The Model ATRT 01 is a microprocessor based field portable automatic transformer turns ratio test meter designed for on site measuring of turns ratios winding polarity and no load excitation currents of single and 3 phase utility transformers The ATRT 01 can also test potential transformers PTs and primary current transformers CTs The ATRT 01 may not test some types of donut transformers i e toroidal windings since its not designed for that application 2 0 Applicability The ATRT 01 is available in three models ATRT 01 basic ATRT 01B and ATRT 01D a The basic 01 is a line powered 120 240 V ac selectable 50 60Hz unit b The ATRT 01B is powered by a rechargeable lead acid gel battery cell An ATRT 01B with a fully charged battery will provide a minimum Of 4 hours of continuous operation A built in charger allows the ATRT 01B s battery to be recharged while it is testing c The ATRT 0ID is powered by 6 D cell batteries no ac is used To conserve battery power the ATRT 01D will automatically turn off after sitting idle for 1 minute A fully charged set of batteries in the ATRT 01D provides power for up to 200 tests 3 0 Operating Configuration The 01 tests transformer ratio by applying an ex
22. ified database or archival records Rev 02 May 02 2002 10 Model ATRT 01 v Operating Instructions 15 0 ATRT 01 Battery replacement 15 1 ATRT 01B Battery Replacement Replace the ATRT 01B battery with the following Panasonic part number LC R122R2PU Note A rechargeable lead acid battery powers the 01 A fully charged ATRT 01B can be continuously operated for 6 hours A built in charger lets the unit to be used during charging Plugging the ATRT 01B into an ac power outlet after the battery is fully charged will not damage the battery It is recommended that the ATRT 01B be plugged into an ac outlet when it s not in use 15 2 ATRT 01D Battery Replacement Replace ATRT 01D batteries with six standard Alkaline D cell batteries Rev 02 May 02 2002 11 Model 01 Operating Instructions 16 0 DISPLAY and MENU DESCRIPTIONS This section describes the operating menus of the ATRT 01 16 1 Start Up Menu 1 TEST XFMR 04 12 00 2 SETUP 13 06 02 3 CALCULATOR Figure 16 0 Start up menu a Description The start up menu lets the user test a transformer set up time select computer interface or use the calculator to manually enter voltage data for transformer ratio calculation b Origin The Start up menu first displays after power is applied to ATRT 01 c Action Options Press key 1 to initiate a transformer test Press key 2 to set clock or select computer interface Press key 3 to calcu
23. late transformer turns ratio Note 1 Real time and date is shown on top left of LCD screen 2 See section 12 1 for LCD contrast control 3 See section 12 2 for LCD back light control Rev 02 May 02 2002 12 Model ATRT 01 v Operating Instructions Figure 16 1 ATRT 01 Menu Diagram YES FROM REPEAT TEST NO XFMR CONFIGURATION XFMR NAMEPLATE VLTG SINGLE PASE XFORMER 1 SNGL PHS 2 4 gt ES 0 START TO RUN TEST SINGLE PHS 3 Y dT 4 dT dT OR 01 v 5 Y Y STOP to ABORT 01 POWER ALL CONFIGURATIONS PRESS ENTER ON ENTER H WINDING PRESS ENTER ENTER X WINDING NAMEPLATE VOLTAGE NAMEPLATE VOLTAGE 7 7 1 SECOND DISPLAY gt VANGUARD INSTRUMENTS NO ATRT 01B NO BOOT LOADER REV 0 92 NO NO 4 SECOND DISPLAY ENTER RETURN TO ATRT O1B REV 1 03 1 SET TIME SET TIME MM DD YY HH MM SS 4 2 COMPUTERT CONTROL STARTUP S N 32896 COM CONTROL MENU OPERATION 0 NOTE COMPUTER COMPUTER IFF MODE CONTROLS ATRT 01 v CAUTION DURING THIS DISPLAY CABLES MAY HAVE VLTG UNTIL STOP IS PRESSED STOP to ABORT THEN RETURNS TO START UP MENU 1 03 30 00 XFMR CONFIGURATION 2 SET UP 10 54 23 1 SINGLE PHS 2 dT Y 27 CALCULATOR ENTER H WINDING NAMEPLATE VOLTAGE SINGLE PHASE XFORME
24. le 6 1 Cable Markings and Identification Test Cable Name Transformer Terminals Clip Color Identification H Cables H2 X Cables X2 Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions 7 0 ATRT 01 Operating Controls And Indicators 1 2 3 SERIAL MADE IN U S A ATRT 01 Automatic Transformer Ratio Tester RS 232C 1 2 WARNING START DO NOT TOUCH OR REMOVE TRANSFORMER ABC TEST CABLES DURING TESTING FAILURE TO HEED THIS WARNING CAN CAUSE 5 4 LETHAL SHOCK AND EQUIPMENT DAMAGE 7 8 9 CONTRAST 120Vac 1A 60Hz Fuse 250Vac 1A Fast Blow PRS TUV WXY Vanguard Instruments Co Inc e Ontario California USA Figure 7 0 Model ATRT 01 Front Panel Controls Indicators and Connectors Fig 7 0 Index Panel Markings Functional Description 1 RS 232C Computer Interface port 9 pin female DB type connector RS 232C interface port allows ATRT 01 to interface with an IBM computer Data rate is set to 19 200 baud 1 start bit 8 data bits 2 stop bits and no parity bit Connector pin functions are PIN SIGNAL 2 Tx 3 Rx 5 Gnd 2 None display LCD screen 4 line by 20 character back lighted sunlight readable Displays menus test results and status readouts High and Low voltage connector 16 pin male 4 120 220Vac 1A 50 60Hz Input power connector and fused power switch with third wire safety ground None Keypad Pushbutton operating controls 16 keys Rev 02 May 02 200
25. n IBM PC Transformer testing program software supplied with each ATRT 01 runs on an IBM Windows based computer and lets users control the ATRT 01 from a computer in the field With a computer users can run a test and save the test results in the field then recall the test later in an office to generate a test report Since data are stored in an ASCII format test results can be exported into any database desired Rev 02 May 02 2002 4 0 Principle of Operation Model ATRT 01 v Operating Instructions The ATRT 01 measures transformer turns ratio by applying a test voltage across the H winding and sensing induced voltage on the secondary X winding For safety testing is always done in a step down transfer regardless of the transformer s actual use There s no load on windings during testing so measured voltage ratio is virtually the same as the winding turns ratio The ATRT 01 measures turns ratios in a range from 0 8 to 15 000 Excitation current via H leads is measured for reference and ranges from 0 0 to 2 000 mA 0 to 200 milliamperes for ATRT 01B and ATRT 01D Winding polarity is displayed as in phase or out of phase The ATRT 01 calibrates its own sensing circuits before each test therefore calibration by the operator is not required 5 0 Specifications Model ATRT 01 v specifications are listed below in Table 5 1 Table 5 1 Model ATRT 01 v Turns Ratio Meter Specifications Unless otherwise indic
26. t repairs be performed only by Vanguard Instrument Co factory personnel or by an authorized repair service Unauthorized modifications can cause serious safety hazards and will nullify the manufacturer s warranty Follow Exact Operating Procedures Any deviation from procedures described in this operator s manual may create one or more safety hazards damage the ATRT 01 or the test transformer or cause errors in the test results VIC assumes no liability for unsafe or improper use of the ATRT 01 Rev 02 May 02 2002 Model ATRT 01 v Operating Instructions Table of Contents KO gt bdo eit Die ee edu cies ete 4 2 0 M M 4 3 0 Operating Configuration eiu eos eer Mai oeufs 4 4 0 Prineiple of Operation sce ie ten ei E HET 5 2 0 9 P M 5 6 0 Cable Marking and Identfieatiom soi e pi ponte euasit eitis 6 7 0 ATRT 01 Operating Controls And Indicators 7 8 0 ATRT 01B Operating Control And Indicators amp 9 0 TOT And Indicators 9 10 0 ATRT 01 Power Switch 10 IO L AXURTSOT Power Turn OBORE euet er dete eee det iret te deese du 10 10 2 ATRTI OT
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