LDDW-DB Grounding Resistance Tester is a specialized instrument for measuring the grounding resistance of the grounding network and the grounding conductivity between the grounding points. This instrument adopts a new type of variable frequency AC power supply and microcomputer processing control technology, mainly used to solve the problem of power frequency interference in the testing of grounding resistance in the power system, improve the accuracy and precision of measurement results, greatly simplify the experimental operation process, and reduce the labor intensity and testing cost of the testing personnel.
| Measurement range | 0~5000 Ω (including current pile impedance) |
| Resolution | 0.001m Ω |
| Measurement error | ± (reading 2% + 0.005 Ω) |
| Anti-power frequency 50Hz voltage interference power | 10V |
| Test current waveform | sine wave |
| Test current frequency | single frequency: 40-70Hz resolution 0.1Hz set at will |
| Dual frequency: 50±0.1Hz to 50±10.0Hz optional setting The 60±0.1Hz to 60±10.0Hz is set up at will | |
| Output current | 5A or the external power supply is 30A |
| Output voltage | 400V or external power supply: 1000V |
| Measurement line requirements | current wire copper core cross-sectional area of 1.5mm² The copper core cross-sectional area of the voltage line is 1.0mm² |
| Test power supply | built-in 2kW frequency conversion power supply or external high-power frequency conversion power supply. |
| Power supply | AC220V± 10%, 50Hz |
1. The appearance of the product is subject to the actual product. Technical parameters and models are subject to change without prior notice. 2. To learn more about Longdian products, please enter the product center. Service Hotline: 400-6727-238
The measured power frequency equivalence is good: the test current waveform is a sine wave, with a frequency that is extremely different from the power frequency, and can be used for measurement at two frequencies of 50Hz or 60Hz to ensure the accuracy of the measurement results.
Strong anti-interference ability: The instrument adopts the frequency difference method for measurement and is equipped with modern software and hardware filtering technology, which makes it have high anti-interference performance. It can accurately measure 50Hz data in strong interference environments of substations, and the test data is stable and reliable.
High measurement accuracy: The basic error is only 0.005 Ω, which can be used to measure the earth network with small grounding impedance, meeting the requirements of high-precision measurement.
Powerful function: It can not only measure grounding impedance and grounding resistance, but also measure current piles, voltage piles, soil resistivity, etc., and can truly reflect the actual characteristics of the grounding network.
Easy to operate: Full touch LCD display screen, super comprehensive graphical operation interface, operators can use it without additional professional training. The instrument operation is controlled by a microprocessor, and as long as the appropriate measurement method is selected, the data measurement can be automatically completed under the control of the microprocessor.
Advanced data management science: The instrument is equipped with a calendar chip and large capacity storage, which can save test results at any time and view historical records. Data can be exported through a USB flash drive and viewed and managed on a PC using specialized software to generate reports and experimental reports.
Safe and reliable: The instrument is equipped with grounding protection, current and voltage limiting protection, as well as sound and light alarm functions to ensure the safety of testing personnel and equipment.
Equipped with vector testing function: capable of measuring ground impedance and ground pure resistance, and measuring impedance angle, providing more comprehensive testing data.
Low wiring workload: No need for high current wires, reducing the complexity of on-site wiring.
Integrated model: Comes with standard resistors and constant current source for easy on-site testing, further simplifying the on-site wiring process.
