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Help CenterTKDWY-5A Ground Network Earth Resistance Tester
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At present in the electric power system the grounding resistance of the earth network is mainly measured by power frequency large current tripole method. In order to prevent power frequency interference during power grid operation and improve the accuracy of measurement results insulation preventive test regulations stipulate that the test current of power frequency high-current method shall not be less than 30A. As a result there are many problems such as bulky test equipment complicated test process high working intensity and long test time.
Ground Network Earth Resistance Tester adopts new frequency conversion ac power supply and adopts microcomputer processing control and signal processing and other measures which well solves the anti-interference problem in the test process simplifies the trial operation process improves the accuracy and accuracy of the test results and greatly reduces the labor intensity of test personnel and test cost.
Ground Network Earth Resistance Tester is suitable for testing power frequency grounding impedance contact voltage step voltage power frequency characteristic parameters and soil resistivity of various grounding devices. Ω measurable substation ground network (4) water and fire power plants microwave station Ω (10) the lightning rod (10 Ω) multi-purpose machines.
Ground Network Earth Resistance Tester adopts different frequency anti-interference technology which can accurately measure data at power frequency of 50Hz under strong interference environment. The maximum of test current is 3A which will not cause excessive potential of grounding device during the test. Meanwhile it also has strong anti-interference ability so it can be measured without power failure.
Product nickname：Earth grid earth resistance tester earth grid earth resistance tester large earth grid earth resistance tester
1、The measured power frequency equivalence is good. Test current waveform is sinusoidal wave and the frequency only differs from the power frequency by 5Hz. 45Hz and 55Hz are used for measurement.
2、Strong anti-interference ability. Ground Network Earth Resistance Tester adopts different frequency method to measure and with modern software and hardware filtering technology the instrument has high anti-interference performance and the test data is stable and reliable.
3、High precision. The basic error is only 0.005 & Omega; can be used to measure the earth network with low grounding impedance.
4、Powerful. Measuring current pile voltage pile grounding resistance stepping voltage contact voltage.
5、Easy to operate. Chinese menu operation direct display of measurement results.
6、Small wiring labor no need for large current line.
| measurement range | 0～200Ω(including the current pile impedance) |
| resolution | 0.001Ω |
| measurement error | ±(readings×1%+0.005Ω) |
| maximum output voltage | AC 400V (45Hz 55Hz dual-frequency sine wave) |
| maximum output current | AC 5A(45Hz 55Hz dual-frequency sine wave) |
| Output gear | 5 / 4.5/4/3.5/3/2.5/2/1.5/1a every 0.5A 9 gears in total |
| anti-interference ability | anti-power frequency 50Hz voltage 10V |
| measurement line requirements | Section area of copper core of current wire ≥ 1.5mm2 |
| Sectional area of copper core of voltage line ≥ 1.0mm2 | |
| power supply | AC220V±10%，50Hz |
| External dimension | 295×340×310mm3 |
| instrument weight | 30kg |
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