Introduction:
GH-6502A earth grounding resistance tester is suitable for testing the power frequency grounding impedance, contact voltage, step voltage, and other power frequency characteristics of various grounding devices and soil resistivity. GH-6502A earth grounding resistance tester adopts the anti-interference technology, which can accurately measure the data under the power frequency of 50Hz under strong interference environment. The test current is up to 5A, which will not cause the potential of the grounding device to be too high during the test. At the same time, it has strong anti-interference ability, so it can be measured without power failure. It can be measured by unipolar method or quadrupole method. Soil resistivity.
GH-6502A earth grounding resistance tester can choose two kinds of measuring frequency, namely “frequency conversion†and “fixed frequencyâ€. When doing experiments in the field, we must select “frequency conversion†to do the experiment, so the measurement can eliminate the electromagnetic field interference at the scene. The "fixed frequency" method can only be used when experimenting in the laboratory. "Frequency conversion" uses 45Hz and 55Hz double frequency conversion to measure. And "fixed frequency" uses strict 50Hz to measure.
nickname:
Grounding resistance tester, earth grounding resistance tester, large grounding grounding impedance tester, large grounding grounding impedance test system, variable frequency high current multi-function grounding grounding characteristic measuring system, grounding impedance test, grounding impedance tester, large Ground network frequency conversion grounding impedance characteristic test system, grounding device characteristic parameter measurement system, frequency conversion large current multi-function tester, inter-frequency grounding impedance tester, anti-interference multi-frequency grounding grounding impedance tester, inter-frequency grounding resistance tester, grounding Resistor frequency tester, earth grounding resistance tester, super large grounding grid grounding impedance measuring instrumentFeatures:
1. The power frequency equivalence measured by the grounding grid grounding resistance tester is good. The test current waveform is a sine wave, and the frequency is only 5 Hz from the power frequency, and is measured using two frequencies of 45 Hz and 55 Hz.2. Strong anti-interference ability. The instrument adopts the different frequency method to measure, and with the 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 Ω and can be used to measure large ground grids with low ground impedance.
4, powerful. It can measure current pile, voltage pile, grounding resistance, step voltage and contact voltage.
5, the operation is simple. Full Chinese menu operation, directly showing the measurement results.
6, wiring labor is small, no need for large current lines.
Technical Parameters:
1, impedance measurement range: 0 ~ 150Ω2, resolution: 0.001 Ω
3. Measurement error: ± (reading × 2% + 0.005 Ω)
4, anti-work frequency 50Hz voltage interference ability: 10V
5, test current waveform: sine wave
6, test current frequency: 45Hz, 55Hz dual frequency
7, the maximum output current: 5A
8, the maximum output voltage: 420V
9. Measurement line requirements: Current line copper core cross-sectional area ≥1.5mm2
Voltage line copper core cross-sectional area ≥1.0mm2
10, power supply: AC220V ± 10%, 50Hz
Earth network grounding resistance tester test operation steps
1) First check whether the current line, voltage line and ground net used for the test have a short circuit (measured with a multimeter), whether the rust on the pile is cleaned, whether the depth is appropriate (greater than 0.5 m), and check the test line and Whether the connection of the pile is conductive. According to the measurement wiring diagram (2), select the ground post and connect the wiring to start the measurement process.
2) After checking the connection is correct, connect the AC220V/50HZ power supply to the instrument to energize the instrument.
3) Press the measurement button to start the measurement (the LCD shows “Testing, please wait...†during the test)
4) After the test of the instrument is finished, the test data is recorded after the test result is displayed (the instrument can be repeatedly measured)
5) After turning off the power of the instrument, remove the connection and the test process is over.
3. Description of fault diagnosis during instrument testing
1) If the instrument displays “Large resistance is too largeâ€, it means that the “current output connection†and “current pole†piles are in poor contact or there are too few piles. It is necessary to increase the pile and reduce the loop resistance. The pile is not less than 0.5 m.
2) The instrument displays “Exceeded Rangeâ€, which means that the measured resistance is greater than 15Ω.
3) The instrument displays “grounding pole, current pole wiring error†means that the current line or grounding wire is not connected.
4) If the instrument displays “Voltage pole connection errorâ€, the voltage line may not be connected.
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