Product Overview
The HM3001 Digital Earth Grid Ground Resistance Tester is a versatile instrument capable of measuring the ground resistance of substation earth grids (4 Ω), hydroelectric and thermal power plants, microwave stations (10 Ω), and lightning rods (10 Ω). It employs a new variable-frequency AC power supply and incorporates microprocessor-based control and signal processing, effectively addressing interference issues during testing and simplifying the testing process.
Features & Advantages
- 1. Excellent power-frequency equivalence. The test current waveform is a sine wave, with a frequency differing from the power frequency by only 5 Hz; measurements are performed using both 45 Hz and 55 Hz frequencies.
- 2. Strong interference resistance. This instrument employs the frequency-shift method for measurement, combined with modern software and hardware filtering technologies, resulting in high interference resistance and stable, reliable test data.
- 3. High accuracy. With a basic error of only 0.005 Ω, it can be used to measure the ground impedance of large grounding grids with very low resistance.
- 4. Powerful functionality. It can measure the ground resistance of current and voltage stakes, grounding grids, continuity resistance, and soil resistivity.
- 5. Simple operation. Measurement results are displayed directly.
- 6. Minimal wiring effort; no high-current cables are required.
Technical Specifications
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1 |
Conditions of use |
-15℃-40℃ |
RH<80% |
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2 |
Anti-interference principle |
Frequency conversion method |
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3 |
Electric source |
AC 220V±10% |
allowed generator |
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4 |
Measure output current |
1A-5A Adjustable |
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5 |
Measure output voltage |
0V-400V |
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6 |
Test power frequency
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45, 50, 55, 60, 65HZ single frequency 45/55, 55/65 47.5/52.5HZ Automatic Dual Frequency |
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7 |
Output rating |
2000W |
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8 |
Distinguishing rate
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Grounding impedance: 0.0001 |
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Impedance angle:0.0001° |
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9 |
Precision |
Grounding impedance:±(1%* reading +0.002) |
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Impedance angle:±(1%* reading +0.02°) |
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10 |
Resistance measurement range |
0.001Ω~5K |
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11 |
Exterior dimensions |
370(L)×295(W)×358(H) |
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12 |
Memory size |
100 groups support U disk data storage |
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13 |
Weight |
Main engine 22 Kg, ground pile 7 Kg |
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FAQs
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