Huazheng HZDW-DB User Manual Download

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HZDW-DB

Ground Network Earth

Resistance Tester

User Manual

Huazheng Electric Manufacturing (Baoding) Co., Ltd

Summary of Contents for HZDW-DB

Page 1: ...HZDW DB Ground Network Earth Resistance Tester User Manual Huazheng Electric Manufacturing Baoding Co Ltd...

Page 2: ...anual and operate and maintain the instrument according to the manual to prolong its service life Just a light press the test will be completed automatically is the operating characteristics of this i...

Page 3: ...ain Technical index 4 V Instrument principle 5 VI Panel introduction 6 VII Measurement wiring 7 VIII Operating steps 8 IX External power use 17 X Measure ground continuity 18 XI Measuring soil resisti...

Page 4: ...amaged you must make sure to replace the fuse of the same specification 7 When the instrument fails turn off the power switch and wait for one minute before checking 8 The instrument should avoid seve...

Page 5: ...ed out The instrument can measure ground impedance and ground resistance at the same time which can more truly reflect the actual characteristics of the ground network III Functional features 1 The me...

Page 6: ...pure resistance The impedance angle can be measured 10 Wiring labor is small no need for large current wires 11 All in one model with standard resistance and constant current source convenient for on...

Page 7: ...le frequency power supply 11 Power supply AC220V 10 50Hz 12 Dimensions 500mm 377mm 330mm instrument weight 20kg V Instrument principle Figure 1 Schematic diagram of measurement principle 1 R0 loop res...

Page 8: ...ole P22 8 Grounding grid C22 9 External AC power supply 10 External AC power supply 11 Grounding pole 12 220V power socket 13 Power switch 14 Emergency stop button 15 LCD screen 16 232 serial port 17...

Page 9: ...re with wire diameter 1 0 mm2 and length 0 618 times 3 Measuring voltage line 2 Connect to a down lead of the measured ground network 4 Measure the ground wire connect to a down wire of the measured g...

Page 10: ...r connecting one end to the instrument according to the specified length The other end is connected to two ground piles as shown in Figure 3 or Figure 4 4 Check the placed test line again connect one...

Page 11: ...nerally choose 50 5Hz or 60 5Hz in field test Of course you can choose something else If you want a single frequency such as 50Hz test you can choose 50 0 0 0Hz Here the frequency value is set freely...

Page 12: ...ernal power supply or external power supply Picture 7 Figure 7 Internal and external power supply selection 4 Test current 2 0A represents the value of the test current The current value here can be s...

Page 13: ...d to use a touch screen pen or finger to click and the numeric keyboard will pop up and then modify Picture 9 Figure 9 Red digital parameter modification interface After filling in the numbers press t...

Page 14: ...e 11 Ground network test interface I 2 000A Instantaneous current during the test U 0 151V Instantaneous voltage during test R 0 075 instantaneous impedance during testing F 55 00Hz constant current s...

Page 15: ...network inductance value L 0 003mH ground grid inductance value Press exit at this time to return to the boot interface Figure 5 Press print to print out the result Press the store button The data st...

Page 16: ...reen pen or finger to click to start the instrument test the test confirmation interface appears Figure 14 Figure 14 Test confirmation interface Click OK to start the up current test Please confirm th...

Page 17: ...00Hz constant current source frequency double frequency conversion F1 F 45 00Hz constant current source frequency double frequency conversion F2 Progress 84 means 84 of the test is completed etc To 10...

Page 18: ...to print out the result Press the store button The data storage interface appears Figure 17 Data storage interface Figure 17 1 Click the data box a small Keyboard fill in the storage serial number 2 P...

Page 19: ...connected 5 When the instrument is tested a resistor of more than 20 ohms can be connected in series to the C1 output terminal to simulate the field current pile resistance 6 To make the test go on s...

Page 20: ...ents of the test Return to the initial interface 5 Click the Start Instrument Test button to start the test 6 All test methods of external power supply are exactly the same as internal power supply te...

Page 21: ...and h is the buried depth of the electrode When a b it is Winner s method For the convenience of calculation please make the electrode spacing a and b much larger than the buried depth h and generall...

Page 22: ...the diagonal length of the ground grid the length of dPG is similar to dCG The ground impedance formula can be modified by the following formula In the formula the angle between the current line and...

Page 23: ...en three pole method should be used to verify the test results There is usually power frequency interference in b transmission lines The test current should be greater than 100 when using three pole m...

Page 24: ...d is small the portable grounding impedance tester is generally used in the test site G test tower grounding device C one current pole P one potential pole maximum ray length of L tower grounding devi...

Page 25: ...ion b when it is found that the measured value of grounding impedance increases or decreases significantly compared with the previous test results the layout direction of current pole and potential po...

Page 26: ...the parallel effect of the grounding impedance of the remote multistage tower grounding device the Z tj is larger than and similar to the grounding impedance of the grounding device of the measured t...

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