Huazheng HZ-4000T2 Manual Download Page 40

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故障点波形二次反射：

Waveform second reflection on point of fault

Right:

采样方式：

Sampling mode

采样频率

: Sampling frequency

电波速度

:Electrical wave

滤波方式

: Filter mode

移动选择

Moves selection

Bottom:

设置

:Settings

起点

: Start Point

采样

: Sampling

打印：

The following figure shows the sampling waveform of high-voltage

multi-pulse(stable arc):

Left: from top to bottom:

对应主波形区两条竖游标：

Corresponding to two vertical cursors of the main

waveform area

全貌波形区

: The whole picture of waveform area

多次脉冲

直流弧延测试方式波形：

Multiple pulse / DC arc extension test mode

waveform

Summary of Contents for HZ-4000T2

Page 1: ...HZ 4000T2 Cable fault location system Operation Manual...

Page 2: ...age equipment Strictly follow the national high voltage equipment operating specifications This instrument has a high voltage characteristics please pay attention to personal and equipment safety Make...

Page 3: ...ear high voltage capacitor arc stabling units and a variety of signal acquisition in one body which facilitates fault location operation 2 Switching between three gear test modes two gear voltage leve...

Page 4: ...gy 1536 joules 5 Ball gap discharge Weak electricity control Discharge cycle can be adjusted within 3 12 seconds It has a specially designed silencer which meets the requirement of silence when fault...

Page 5: ...right Input Cable Fault Location System High voltage output cable Ground of protection Red clip Black clip Ground of system Fault cable 2 The following figure is wrong test wiring From left to right...

Page 6: ...igure In the drawing 1 total switch 2 Adjusting the ignition time 3 Selecting test voltage 4 Selecting Test Mode 5 Start ignition stop key 6 Regulator knob 7 Output voltage indicator 8 Output current...

Page 7: ...4 Adjust the ignition time knob and test voltage gear button and test mode gear button if the test instrument is in high voltage charged state or start state the test voltage test mode adjustment oper...

Page 8: ...e The boost can be slightly low and gradually increased but do not set voltage exceeding the voltage gear when it s the first connection 8 The operator pulse reflect meter TDR will test input signals...

Page 9: ...not allow the instrument stopped using more than 20 minutes Turn off the power switch if you do not use it in a long term V HZ 4000T2 Cable Fault Location System Physical List 1 HZ 4000T2 cable fault...

Page 10: ...test of power cable has been a headache for power system Using cable fault test capabilities provided by this system will make it very simple In line with the different nature of power cable fault th...

Page 11: ...s Reading resolution V 2f m resolution of less than 0 5 m Preset four kinds of cable wave propagation speed in the instrument Four sets of waveform processing makes it easier to identify waveform and...

Page 12: ...ardware waveform processing circuit compared with DMS 3500 HZ 4000T2 Cable Fault Tester Operation I Panel Structure Introduction Panel layout schematic diagram as above functions as following Q output...

Page 13: ...red clip with cable core wire and the black clip with cable shield ground or another phase on the other side 2 Wiring of high voltage method Connect signal test line on Cable Fault Location System con...

Page 14: ...ers and sampling waveform each part as follows Starting point green and end point red of the whole picture waveform display area indicates waveform interval that has been selected The whole picture wa...

Page 15: ...u select wave up and down arrow keys to move waveform Waveform can only be moved in waveform comparison function mode or multiple pulse mode 12 Filtering methods Shortcut key Select filtering methods...

Page 16: ...creen will not be turned on so please turn off the switch immediately to charge Note When measure with high voltage mode the cable fault tester host should use the battery with it to avoid interfering...

Page 17: ...r XLPE cables you can choose 172m s If Electric Wave Speed is not in these types press Settings Speed setting to select Magnitude knob can be placed on about one third 4 Press Sampling key to collect...

Page 18: ...Moves Selection must be in cursor state Press inflection point at the start and the vertical cursor will move over here then you can press key to fine tune Press Starting Point to locate this cursor P...

Page 19: ...t Key To adjust sampling reference point and move upward the position indicating benchmark of left triangle appeared In the waveform comparison and multiple pulses mode available to move up waveform K...

Page 20: ...the desired operation or to enter corresponding interface when you need to adjust parameters or process waveform Menu will display as follows after you press Settings key Menu Displayed After Pressin...

Page 21: ...ey and it appears as shown in the display Press Sampling Frequency Picture of Proportion Communication Rate according to need and you can enter corresponding parameter sampling frequency of 120M 60M 3...

Page 22: ...Communicating speed exit OK Right Sampling mode Sampling frequency Electrical wave Filter mode Moves selection Bottom Settings Start Point Sampling Working voltage Pulse Settings Press Pulse Settings...

Page 23: ...set to 2 5 The longer the cable length is the larger this value is Width refers to width of low voltage pulse transmitted typically long distances between width of 0 2 microseconds to 0 5 microsecond...

Page 24: ...four different cable speed keys already so you can directly click to select If it s other speed of cable you can click Speed Settings before showing digital keys which you can input speed values Inpu...

Page 25: ...d Press Cable Speed key to enter sub menu to measure cable speed The premise is that you ve already got electric wave in Sampling mode and already moved a good starting point and end point of the curs...

Page 26: ...speed exit OK Right Sampling mode Sampling frequency Electrical wave Filter mode Moves selection Bottom Settings Start Point Sampling Working voltage Waveform Processing There are Waveform Recall Wav...

Page 27: ...ant according to time displayed and press OK key to bring it up A small area of intermediate position of the yellow waveform shows thumbnails of the waveform which can display curve of the waveform to...

Page 28: ...Comparison function Press Waveform Comparison key use up and down arrows on the lower row to select the files that need to be compared and you can choose any one of the 60 Press OK to achieve contras...

Page 29: ...ch waveform occupies 64K bytes Storage uses sampling time for file name Press Waveform Storage key and select the location to be stored with up and down keys on the lower row and press OK to store If...

Page 30: ...Speed Waveform Processing Time Setting Exit Middle Waveform Recall Waveform Comparison Waveform Storage Waveform Delete Waveform Print exit OK Right Sampling mode Sampling frequency Electrical wave F...

Page 31: ...e and time Respectively press year month day hour second to be set and the corresponding figures will turn red then you can use digital keyboard to input value After all the input is completed remembe...

Page 32: ...n quickly move the cursor to the destination point in the main display area Starting point is green and the end is white If you want to change the starting point move the white cursor to the point to...

Page 33: ...4 Waveform Introduction in Various Sampling Methods The following figure shows the whole long distance waveform for low voltage pulse cable or distance waveform of cable disconnection fault...

Page 34: ...rm Compression ratio of the main waveform Fault distance Width The whole distance or open circuit fault distance of the cable Main waveform area Pulse launched by instrument Open circuit reflected wav...

Page 35: ...ow voltage pulse test mode waveform Compression ratio of the whole picture of waveform Compression ratio of the main waveform Fault distance Width Short circuit fault distance Main waveform area Pulse...

Page 36: ...waveform comparison Left from top to bottom Corresponding to two vertical cursors of the main waveform area The whole picture of waveform area Low voltage pulse test mode waveform Comparison between g...

Page 37: ...by instrument Whole distance Whole distance reflected waveform Right Sampling mode Sampling frequency Electrical wave Filter mode Moves selection Bottom Settings Start Point Sampling Print The follow...

Page 38: ...of waveform Compression ratio of the main waveform Fault distance Width Greater than fault distance Fault distance Main waveform area Ball gap discharge waveform Point of fault flashover breakdown wav...

Page 39: ...ure of waveform area Current sampling test mode waveform Compression ratio of the whole picture of waveform Compression ratio of the main waveform Fault distance Width Greater than fault distance Faul...

Page 40: ...s selection Bottom Settings Start Point Sampling Print The following figure shows the sampling waveform of high voltage multi pulse stable arc Left from top to bottom Corresponding to two vertical cur...

Page 41: ...Width Fault distance Whole distance of cable Main waveform area Right Sampling mode Sampling frequency Electrical wave Filter mode Moves selection Bottom Settings Start Point Sampling Print VII HZ 40...

Page 42: ...ear of cable fault location instrument to determine the location of cable fault Cable fault location instrument uses a 3 8 inches 320 240 dot matrix high resolution LCD screen design which has abundan...

Page 43: ...Electromagnetic gain 80DB 5 Working voltage 3 5V 8V 4 of AA Battery 6 Current consumption 80MA LCD backlight off 180MA LCD backlight on 7 Magnetic acoustic difference 0 25 ms 8 Time difference resolu...

Page 44: ...III Structural Principles Probe View magnet bar vertical position Probe view magnetic bar transverse position...

Page 45: ...From left to right Battery compartment Side view Headphone output Front view Power switch From left to right Rear view Input...

Page 46: ...ing mode of location instrument or path instrument After pressing Settings key to enter setting interface when menu bar appears select parameters needed to be adjusted using arrow keys Change the valu...

Page 47: ...Parameter Settings Function Selection Interface From top to bottom Parameter settings 56 Light 56 Backlight off Function L Parameter adjustment...

Page 48: ..._ Magnetic difference cursor Current sound band pass 4 band pass 4 Current sampling switch state Sampling open Current amount of magnetic gain 50 Magnetic gain 50 Current amount of sound gain 50 Soun...

Page 49: ...and less than 100 mA Under normal circumstances you can hear beep sound from signal generator in the headphones of the location instrument Press or key to adjust the size of the sound heard and press...

Page 50: ...an electromagnetic pulse when high voltage ignition it will automatically generate a waveform sampling process and the electromagnetic waveform and sound waveform will automatically refresh and displa...

Page 51: ...arrow key or is used to select the sound band pass There are four kinds of sound band pass respectively 200 Hz 450 Hz 800 Hz and 1500 Hz For different geological and cable media there is a best sound...

Page 52: ...ue of magnetic Gain will change In usage according to the signal strength adjust the size of sound gain and magnetic gain to facilitate analyzing waveform Left or right side of Cable judgment The loca...

Page 53: ...n of the fault As some of the cables are directly buried or embedded in the channel while there is no complete drawing to clearly determine the cable path This is where you need delicate instruments t...

Page 54: ...e coil is located directly above the wire and parallel to the cable the magnetic field lines are perpendicular to the plane of the coil The magnetic field lines go through the coil by maximum coupling...

Page 55: ...tion make the magnet coil axis perpendicular to the ground and slowly move the coil When the coil is located directly above the wire and perpendicular to the cable the magnetic field lines are paralle...

Page 56: ...gradually becomes larger When moving to a certain distance the sound will be the maximum Move a further distance and the sound will gradually become weakened In the vicinity of the cable the sound and...

Page 57: ...d it is always easy to distinguish So crest method applies perfectly when just beginning to discover cable The crest method has a weak signal and narrow crest which is good for delicate location But i...

Page 58: ...the smallest sound in the headphones Line BO and CO connecting two valley point B or C and the cable location O are 45 degrees to the straight line AO which makes triangles AOB and AOC right angle iso...

Page 59: ...he coil so the induced electromotive force generates in the coil and you can hear the loudest sound in headphones Then move the ferrite antenna on both sides A small part of the magnetic field lines o...

Page 60: ...c of impact discharging sound measurement method if you are equipped with DMS series cable fault location system you can switch Test Mode Select key to location mode a phase ground fault wiring diagra...

Page 61: ...g the cable path on the estimated location of the fault After hearing the sound of the point of fault discharge you still need to find out the biggest sounding place along the cable path Just find the...

Page 62: ...signal to be amplified and then shown as a display element This creates the conditions for synchronous reception method of location instrument When locate by synchronous receive method if you hear th...

Page 63: ...the battery voltage 4 AA batteries No 5 batteries can generally be used 20 hours not opening LCD backlight or 10 hours opening LCD backlight When the voltage is below 4V please replace the battery VII...

Page 64: ...0 50V 0 100V Output Current 0 1000mA Output frequency 15 kHz for path detection 300Hz for electromagnetic location Exo 105 high 240 width 290 Depth mm III Usage Connected to power and then turn on th...

Page 65: ...s on the instrument then the screen will have an output current indication Output jack should be connected from the low voltage to high voltage When the output current indication is 200 600 range the...

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