Product name: Earth Grid Grounding Resistance Tester
Product specifications: XSN-DWS1
Product introduction: XSN-DWS1 adopts a new variable frequency AC power supply, and adopts microcomputer processing to control the XSN-DWS1 earth grid ground resistance tester and signal processing measures, which solves the anti-interference problem in the test process and simplifies the test. The operation process improves the accuracy and accuracy of the test results, and greatly reduces the labor intensity and test costs of the test personnel. XSN-DWS1 Earth Grid Grounding Resistance Tester is a special instrument for measuring the grounding resistance of the grounding grid and the grounding continuity between the grounding points. The instrument adopts frequency conversion anti-interference technology, does not need high current measurement, and can measure accurate data of 50Hz in the strong interference environment of the substation. The measurement result is displayed by the large-screen LCD, and the built-in micro-printer can be printed out. The instrument can measure the ground impedance and ground resistance at the same time, which can truly reflect the actual characteristics of the ground network.
Features:
1. The measured power frequency equivalence is good. The test current waveform is a sine wave, the minimum difference between the frequency and the power frequency is 0.1 Hz, and the maximum is 10 Hz. Can be used for measurement at two frequencies of 50hz or 60hz;
2. Strong anti-interference ability. This instrument adopts the different frequency method to measure, and cooperates with modern software and hardware filtering technology, so that the instrument has high anti-interference performance, and the test data is stable and reliable;
3. High measurement accuracy. The basic error is only 0.005Ω, which can be used to measure the earth network with very small ground impedance;
4. Powerful functions. It can measure current pile, voltage pile, ground network impedance, ground resistance, ground continuity, soil resistivity, step voltage, contact voltage, potential gradient, etc.;
5. Full touch LCD screen, super large graphic operation interface, every process is very clear and clear. Operators can use it without additional professional training. The whole process of testing can be completed with a light touch;
6. It is equipped with a calendar chip and a large-capacity memory inside, which can save the results at any time. The historical records can be viewed at any time and can be printed out. The current time and storage time can be displayed and printed;
7. Scientific and advanced data management: The instrument data can be exported through U disk, and the data can be viewed and managed on any PC through special software. Able to generate reports and test reports;
8. Safe and reliable. The instrument has functions such as grounding protection, current limiting and voltage limiting protection, sound and light alarms to ensure the safety of test personnel and equipment;
9. With vector test function, it can measure ground network impedance and ground network pure resistance. The impedance angle can be measured;
10. Small wiring labor, no need for high current wires;
11. Integrated model with standard resistance and constant current source inside, which is convenient for on-site testing and reduces on-site wiring;
12. The instrument is easy to operate and the measurement process is controlled by the microprocessor. As long as the correct measurement method is selected, the data measurement can be automatically completed under the control of the microprocessor.
Product nicknames: ground grid ground resistance tester, ground grid ground resistance tester, large ground grid ground resistance tester.
Test object:
It is suitable for testing and testing the grounding resistance of large-scale power grids in power departments, substations and other institutions.
Host technical parameters:
1. Measuring range: 0～5000Ω (including current pile impedance)
2. Resolution: 0.001mΩ
3. Measurement error: ±(reading×2%+0.005Ω)
4. Ability to resist power frequency 50Hz voltage interference: 10V
5. Test current waveform: sine wave
6. Test current frequency: single frequency: 40-70Hz, resolution 0.1Hz, free setting
Dual frequency: 50±0.1Hz to 50±10.0Hz can be set at will
60±0.1Hz to 60±10.0Hz can be set freely
7. Output current: 5A or external power supply 30A
8. Output voltage: 400V or external power supply 1000V
9. Measuring line requirements: Current line copper core cross-sectional area ≥ 1.5mm2
Voltage line copper core cross-sectional area ≥1.0mm2
10. Test power supply: Built-in 2kW variable frequency power supply or external high-power variable frequency power supply
11. Power supply: AC220V±10%, 50Hz
12. Dimensions: 500mm*377mm*330mm
13. Instrument weight: 20KG
Technical parameters of frequency selection table:
The frequency selection meter can only be used with the earth grid grounding resistance meter for anti-interference measurement of the surface potential gradient, step voltage and contact potential difference. During measurement, the earth grid grounding resistance meter outputs a constant variable frequency current to the grounding device, and the frequency selection meter detects the frequency to filter out power frequency interference. With voltage measurement function, it is used for ground potential gradient measurement. Built-in human body analog resistance for step voltage and contact voltage measurement. Equipped with rechargeable batteries.
1. Measuring range: 0～100V Accuracy: ±(reading×1%+0.1mV)
2. Maximum resolution: 0.001mV
3. Input impedance: >500kΩ Human body simulation resistance: 1500Ω±5%
4. Measuring frequency: Corresponding to the earth network grounding resistance meter Interference suppression ratio: ≥80dB
5. Measuring frequency: Corresponding to the earth network grounding resistance meter Interference suppression ratio: ≥80dB
6. Charging power supply: 220V±10%, 50Hz / 60Hz
7. Weight: 0.5kg
