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Tonghui TH2883S4-5, Руководство по эксплуатации

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TH2883 Series Operation Manual                                                                                        Chapter 7 User guide 

7-3 

 

7.4  

Technology application 

7.4.1  Test objects 

1.

 

Turn-to-turn and layer-to-layer short 

Turn-to-turn  short  refers  to  the  short  caused  by  the  insulation  damage  between  turns. 

Layer-to-layer  short  occurs  in  the  coil  consisting  of  multiple  layers.  There  are  two 

kinds  of  short:  direct  short  and  pull  arc  short,  both  of  which  are  shown  as  more 

dissipation. 

2.

 

Bad coil 

The different number of coils will cause the variation of inductance, which is reflected 

as the change of oscillation period. 

3.

 

Corona discharge 

Due  to  the  use  of  impulse  high  voltage,  if  the  insulations  between  the  coil  and  layer 

and terminal are not strong enough, operator can observe the discharge and the corona 

discharge  phenomenons.  The  corona  discharge  that  can  be  captured  by  the  impulse 

winding tester has weak energy. Instead of influencing the attenuation oscillation wave, 

it is only displayed as discrete jumping points around the waveform of high potential. 

4.

 

Material of magnetic core 

Whether a magnet is used in the coil as the magnetic core or the magnet is poor, above 

conditions of the magnet will influence the inductance and the dissipation. Likewise, if 

air gas is designed in the magnetic core, the size of which will also have an impact on 

the  inductance and  the  dissipation.  Effects  mentioned  above  will  show  as  changes of 

the attenuating vibration period and the attenuation degree. 

7.4.2  Select comparison method 

Area size comparison is mainly used to compare the energy consumption. 

Differential area comparison is sensitive to energy consumption and inductance change. 

Corona comparison method is the best one for testing internal insulation of the coil. 

Differential phase comparison is the most suitable one to show the inductance difference. 

To  test  turn-to-turn  short  or  layer-to-layer  short,  it  is  recommended  to  use  Area  Size 

comparison. 

Poor coil can be recognized by Differential Phase comparison. 

The insulation performance has some impacts on the life span of the coil products. For this 

reason,  when  the  test  occasion  requires  high  standard  of  insulation  performance,  corona 

comparison must be switched on. 

The  material  difference  of  magnetic  core  can  be  tested  by  Area  Size  comparison, 

Differential Area comparison or Corona comparison. 

Содержание TH2883S4-5

Страница 1: ...an n nS S Sh h ha a an n n R R Ro o oa a ad d d X X Xi i in n nB B Be e ei i i D D Di i is s st t tr r ri i ic c ct t t C C Ch h ha a an n ng g gz z zh h ho o ou u u J J Ji i ia a an n ng g gs s su u...

Страница 2: ...comparison 2 4 Chapter 3 Panels and display 3 1 3 1 Front panel 3 1 3 2 Rear panel 3 3 3 3 Introduction to display area 3 4 Chapter 4 Introduction to DISP 4 1 4 1 Measurement display page 4 1 4 2 Intr...

Страница 3: ...ONE PHASE DIFF 5 6 5 2 15 DIFF Limit CORONA 5 6 5 3 Match Setup 5 6 5 3 1 Step 5 7 5 3 2 Mode 5 8 5 3 3 Std Name available in Sample mode 5 9 5 3 4 Step NO available in SW Copy 5 9 5 4 Int File 5 9 5...

Страница 4: ...nce 8 1 8 1 Command structure 8 1 8 2 Notation conventions and definitions 8 3 8 3 Command reference 8 3 8 3 1 DISPlay subsystem commands 8 3 8 3 2 IVOLTage subsystem commands 8 6 8 3 3 SRATE subsyste...

Страница 5: ...c information 9 2 9 2 Electrical characteristics 9 3 9 2 1 DC isolated output 9 3 9 2 2 Isolated input 9 4 9 3 Jumper setup on HANDLER interface 9 5 Chapter 10 Package contents and warranty 10 1 10 1...

Страница 6: ...ble To avoid electrical shock hazard do not touch test terminals and test samples The reason is that a high voltage test cable is connected to the rear panel of this instrument thus when testing the c...

Страница 7: ...products Principles of impulse winding test The impulse winding tester tests the electrical characteristics of coil winding without damaging the DUT The prerequisite condition is to test the quality o...

Страница 8: ...y 47 5Hz 63Hz Consumption 200VA 1 2 2 Environment temperature and humidity Normal working temperature 0 40 Humidity 90 RH Referential working temperature 20 8 Humidity 80 RH Transferring environment t...

Страница 9: ...times sec voltage output 10kV 6 times sec single channel 6 times sec single channel Pulses applied Max 32 Input impedance 5M Display 800 480 dot matrix LCD 65k color TFT Waveform display dots 600x256...

Страница 10: ...calculated integration method between A and B The percent deviation is the ratio of the area size difference to the area size of the standard waveform between A and B expressed as a percentage Figure...

Страница 11: ...on When comparison method is set to Corona Discharge TH2883 detects the high frequency energy of corona discharge from A to B as shown in Figure 2 3 When the corona evaluation value is less than the c...

Страница 12: ...set and C D is the oscillation period of standard waveform The third zero crossing point of the compared waveform is to set Figure 2 4 Phase Differential Comparison NOTE The tester can only set zero c...

Страница 13: ...rs system configurations etc 3 SOFTKEY The five keys functions are not fixed and have different functions in different menus Five soft keys are used to select control and parameter functions Current f...

Страница 14: ...ison result is up to standard while FAIL below indicator Valid only in comparison function 14 START Press the START key to start a measurement In the process of test pressing the key will terminate th...

Страница 15: ...PC can remotely control TH2883 through the USB DEVICE interface 3 RS232C serial interface RS232C serial interface can be connected to an external device for remote control and operation 4 LAN interfac...

Страница 16: ...veform 2 Test status RUN means in the test process STOP means the test has been terminated 3 Waveform display area In this area test and standard waveforms peaks of impulse voltage and comparison resu...

Страница 17: ...display area in X direction The time shown in this area cannot be modified by user but varies with the sampling rate and time base zoom 14 Peak value Show the peak value of the current test voltage 1...

Страница 18: ...function Statistics display color of the waveform test step sampling rate etc Figure 4 1 shows the measurement display page 4 1 Measurement display page Figure 4 1 Measurement display page 4 2 Introdu...

Страница 19: ...displayed on the screen below When all the results of the test steps are OK the final result is PASS Once one of the test step fails the final result is FAIL 4 3 1 2 Single If Single is selected the c...

Страница 20: ...se differential comparison method All setup operations are the same as those of AREA SIZE But the position parameter is different it means to choose the zero crossing position and the value ranges fro...

Страница 21: ...details Scale Lighten the icon and enable the roller Then revolve the roller to enlarge the waveform display scale ranging from 1 to 3 times When the display scale is larger than 1 times the ratio wi...

Страница 22: ...tion Manual Chapter 4 Introduction to DISP 4 5 Clear Clear the current statistic results Save Save the current statistic data to external U disk The default format is csv Return to the main menu 4 3 6...

Страница 23: ...e cursor will move up down left and right When the icon becomes dark the numerical arrow key is disabled Likewise the cursor can be moved by pressing START except in the measure display page NOTE When...

Страница 24: ...Back Select the last test step Next Select the next test step Delete Delete the current test step Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the cursor will move up...

Страница 25: ...5MSa s 12 5MSa s 6 25MSa s 3 12MSa s 1 56MSa s are optional for sample rate Move the cursor to the sample rate zone following soft keys are available Be used to select the desired sample rate Lighten...

Страница 26: ...on Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the cursor will move up down left and right 5 2 8 Start Volt can be set in BDV test mode Start Volt ranges from 100V to...

Страница 27: ...PHASE DIFF Set the comparison ranges for AREA SIZE DIFF ZONE and CORONA that range from 0 to 6000 the value of the end position must be larger than that of the start position Use numeric buttons to e...

Страница 28: ...lue and press ENTER for confirmation Move the cursor to this zone following soft keys will be displayed They are coarse adjustment soft keys used to change the limit value by a resolution of 10 dots T...

Страница 29: ...omplete Press this key to complete the acquisition of standard waveform Average 1 Indicate the number of sample handling Undo Undo the current acquisition data of standard waveform Press this key the...

Страница 30: ...n error and wait to restart sampling Start Enable loop test Return to previous menu Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the cursor will move up down left and...

Страница 31: ...ould be pressed Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the cursor will move up down left and right 5 3 4 Step NO available in SW Copy Other step name that can be...

Страница 32: ...otherwise NO Copy to E Copy internal files to external files in U disk Using the arrow key or the roller can select the desired file If the selected file is needed to copy to an external U disk press...

Страница 33: ...ely press 8 2 4 6 the cursor will move up down left and right 5 5 Ext File Figure 5 4 shows the page of external file Figure 5 4 External file The set parameters can be saved to a U disk external file...

Страница 34: ...e named as the default name FILExxx TXT xxx ranges from 001 to 999 Press CSV the file will be save as CSV file If the file name is not input the file will be named as the default name FILExxx CSV xxx...

Страница 35: ...is a toggle key the press of which will make the displayed page toggled among System Parameter Interface About 6 1 System Figure 6 1 shows the System page Figure 6 1 System Parameters irrelevant to te...

Страница 36: ...g soft keys will be displayed They are soft keys used to adjust the volume of the pass alarm The lowest volume is mute Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the...

Страница 37: ...function it is required to input the password Modify This key is used to modify the password The instrument will prompt user to input old password new password and new password again in turn Press ES...

Страница 38: ...an be set in this zone The display format is like 06 22 28 Move the cursor to this zone following soft keys can be used They are soft keys used to adjust time by 1 Lighten this key to enable the numer...

Страница 39: ...in this mode Lighten this key to enable the numerical arrow key Respectively press 8 2 4 6 the cursor will move up down left and right Note In the latter two modes when SEQ CYCLE or SINGLE CYCLE is se...

Страница 40: ...delay time can be set from 0 1s to 99s by 0 1 steps Move the cursor to this zone User can input the delay time by pressing numerical keys and ENTER for confirmation The input unit is s Following soft...

Страница 41: ...ment RS is the English abbreviation of Recommended Standard 232 the standard number This standard is issued by IEA in 1969 which rules to send one bit in a data line every time As most serial interfac...

Страница 42: ...l move up down left and right 6 2 2 2 Data Bit Move the cursor to this zone following soft keys can be used 6 Set the data bit to 6 Bit 7 Set the data bit to 7 Bit 8 Set the data bit to 8 Bit Lighten...

Страница 43: ...w key Respectively press 8 2 4 6 the cursor will move up down left and right 6 2 3 1 USBCDC interface Choosing USBCDC user can configure the USB interface as a virtual serial port Connect USB interfac...

Страница 44: ...trument through the USB interface This connection conforms to USBTMC USB488 and USB2 0 protocols Connect USB interfaces on PC and TH2883 through a USB cable Install drive The installing steps of USBTM...

Страница 45: ...wser 2 Access TH2883 by Labview software System configuration TH2883 is connected to a PC by a crossover network cable If TH2883 is connected to a router peer to peer network cable should be used Para...

Страница 46: ...troduction to SYSTEM 6 12 Figure 6 9 Network parameters of Host computer Figure 6 10 Network parameters of TH2883 6 2 4 1 Access TH2883 through a browser When TH2883 is accessed through a browser it a...

Страница 47: ...n as figure 6 11 Figure 6 11 Access to TH2883 through a browser 4 Click the item link as circled by the red line in above figure on the left side of the web page to enter the corresponding web page 6...

Страница 48: ...Manual Chapter 6 Introduction to SYSTEM 6 14 Figure 6 12 About Following soft keys can be used in the About page Reset Press this key to reset the instrument Factory Press this key to reset the instru...

Страница 49: ...ened all functions of the roller will be invalid 3 Choose and modify parameters Revolve the roller in the purpose of moving the cursor to the parameter to be modified Press the roller to choose the pa...

Страница 50: ...cursor in Step choose Auto to enter the page of auto sample function Press the Start soft key to automatically change the test frequencies After a loop test for DUT is done a waveform most suitable f...

Страница 51: ...n the coil as the magnetic core or the magnet is poor above conditions of the magnet will influence the inductance and the dissipation Likewise if air gas is designed in the magnetic core the size of...

Страница 52: ...s the transition one The default value is 10 B I t is the same as A Take a coil to make failure test Short two adjacent turns of coil and then make another test Take the differential area size of the...

Страница 53: ...7 User guide 7 5 value of the corona but also the chart record of differential area after each test The chart can help user observe the changing regularity of the area differences during the test fro...

Страница 54: ...commands and the lower level commands See Figure 8 1 for a sample COMParator AREAsize DIFFzone COMP AREA ON COMP DIFF OFF RANGe COMP AREA RANG 0 6000 Figure 8 1 Command Tree Basic rules of commands st...

Страница 55: ...vious middle or last on a multiple command line partitioned off with semicolons For example COMP AREA ON trg DIFF ON Short form rules If complete commands and parameters called long form afterwards ha...

Страница 56: ...e that the enclosed test is string data 2 The following characters will be used in this chapter to describe GPIB commands NR1 Integer numeric data For example 123 NR2 Fixed point numeric data For exam...

Страница 57: ...urement MSETup sets the display page to the measurement setup page Meas SETup SSETup sets the display page to the system setup page System SETup IFILE sets the display page to the internal file setup...

Страница 58: ...the current waveform display mode Command syntax AON DISPlay WAVE STD TEST AOFF Where AON Both the standard waveform and the tested waveform are displayed on the screen STD Only the standard waveform...

Страница 59: ...rid display mode is ON The MEASdisp command sets the steps to measure waveform display Command syntax DISPlay MEASdisp UP Return to the last measurement waveform graph and result DOWN Return to the ne...

Страница 60: ...eturns the current voltage for Break Test Command syntax IVOLTage BVOLTage value1 value2 value3 Where value1 value2 value3 can be NR1 NR2 or NR3 data format or parameters followed by KV V suffix the s...

Страница 61: ...ON or OFF The VADJust query returns the current state of the impulse auto adjust function Command syntax ON IVOLTage VADJust OFF Where ON When the function is ON OFF When the function is OFF For exam...

Страница 62: ...em command tree Figure 8 4 Sample RATE subsystem command tree The RATE command sets the sample rate The RATE query returns the current sample rate Command syntax SRATE RATE value Where value The avail...

Страница 63: ...tree of the COMParator subsystem commands Figure 8 5 COMParator subsystem command tree The BDV here stands for the destruction test and its comparison setting method is the same as the non destructiv...

Страница 64: ...parator function to ON or OFF The AREAsize STATe query returns the current Areasize comparator state Command syntax ON COMParator AREAsize STATe OFF 1 0 COMParator BDV AREAsize STATe ON OFF 1 0 For ex...

Страница 65: ...rt pot end pot NL END start pot end pot are NR1format The AREAsize DIFFerence command sets the difference limit value of Areasize comparator The AREAsize DIFFerence query returns the current differenc...

Страница 66: ...erwise an error message will be displayed on the system message line Query syntax COMP DIFF RANG Return format start pot end pot NL END start pot end pot are NR1 format The DIFFzone DIFFerence command...

Страница 67: ...md COMP CORO RANG 100 200 set the comparison range from 100 to 200 NOTE The end point value should be larger than that of the start point otherwise an error message will be displayed on the LCD screen...

Страница 68: ...ASediff POSItion value Where value Zero crossing position value NR1 format range from 2 to 10 without unit For example WrtCmd COMP PHAS POS 3 the third zero crossing point is used Query syntax COMP PH...

Страница 69: ...ng state The trigger mode must be set to BUS mode or this command will be ignored This command is only used to trigger the test of DUT Refer to Standard WAVE subsystem commands for the details of trig...

Страница 70: ...ATe command sets the statistic function to ON or OFF The STATe query returns the current state of the statistic function Command syntax ON STATistic STATe OFF 1 0 Where 1 decimal 49 When the function...

Страница 71: ...m right shift Or WrtCmd WADJust MOVE RIGHt Waveform right shift The EXTend command is used for time base scaling for the waveform The EXTend query returns the time base scaling of the waveform Command...

Страница 72: ...m sample mode to one sample For example WrtCmd SWAVE SMODE OSAMPle set the standard waveform sample mode to one sample Query syntax SWAVE SMODE Return format SEQ CYCLE ONE CYCLE NL END ONE SAMPLE Wher...

Страница 73: ...tem commands The FETCh subsystem commands are used to output waveform data comparison results and including the output voltage frequency and time measurement result Figure 8 10 shows the FETCh subsyst...

Страница 74: ...is the general comparison result 1 PASS or 0 FAIL The following four data are the comparison results corresponding to each comparator AREA SIZE DIFF ZONE CORONA and PHASE DIFF NOTE TH2883 returns the...

Страница 75: ...nt is overlapped with the end cursor completely then 9 9E37 will be returned The TIME query returns the current time result in the set time range Refer to MEASure subsystem commands for the time range...

Страница 76: ...OLTage Return format upper lower NL END Both upper limit and lower limit are NR1 format The FREQuency command sets the frequency range The FREQuency query returns the currently set frequency range Com...

Страница 77: ...ubsystem command TH2883 will abort the current measurement as soon as the ABORt command is received Command syntax ABORt For example WrtCmd ABOR 8 3 12 Mass MEMory subsystem commands The Mass MEMory s...

Страница 78: ...user can enter some special characters such as special symbols and letters in lower case that cannot be input on the panel of the instrument The DELete STATe command deletes a file Command syntax MMEM...

Страница 79: ...e For example WrtCmd MeasSTEP MODETESTMODE set the test mode to normal test mode Query syntax MeasSTEP STEP The query returns NR1 NL END NR1 represents the current test step mode with 0 representing T...

Страница 80: ...form setup step The DOWN command is used to set the waveform step Command syntax WaveSTEP DOWN Returns to the next step For example WrtCmd WaveSTEP DOWN returns to the next waveform setup step The Wav...

Страница 81: ...tep Other modes cannot use DOWN For example WrtCmd WaveSTEP STEPUP returns the previous step of copying or comparing the standard Query syntax WaveSTEP WaveMODE The query returns step NL END step is a...

Страница 82: ...splayed on the message line when they occur Error message Description Unknown message Unknown command is received Usually there is a spelling error in the command For example TRG should be TRIG DISP P...

Страница 83: ...Command ignores Some command may be ignored For example DISP PAGE MSET When TH2883 is in the testing state this command will be ignored Error syntax Grammatical errors For example WrtCmd MMEM STOR STA...

Страница 84: ...urement data however is not valid until BUSY is asserted to low PIN BUSY TH2883 series is in the test state When calculation comparison and display are all completed this signal is asserted to low PIN...

Страница 85: ...s 9 2 1 DC isolated output Each DC output pins 2 through 5 is the collector output of the built in pull up resistor and isolated by an opto coupler The output voltage of each line is set by a pull up...

Страница 86: ...setting is to use external voltage source Refer to the next section Jumper Setup 9 2 2 Isolated input The START signal pin 7 and the STOP signal pin 8 are connected to the cathode of the LED in an opt...

Страница 87: ...gher than 8V you should replace the Current limit resistor to avoid damaging circuit components Current limit resistor R705 and R706 should be both replaced The detailed replacement information about...

Страница 88: ...are set at the upper position If you want to apply the internal power supply you must set both jumpers at the lower position Likewise when using external power supply to substitute the internal power...

Страница 89: ...option defective product or component parts The maintenance for this instrument should be performed by professional maintenance personnel Do not substitute the internal components unauthorized when m...

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