Refine On (Hebei) Electric Power Technology Co., Ltd. is one of the leading manufacturers and suppliers of clamp on earth resistance tester in China. If you're going to wholesale durable clamp on earth resistance tester, welcome to get quotation from our factory. All customized products are with high quality and competitive price.
Clamp on Earth Resistance Tester features a split‑core transformer jaw that measures the resistance of a complete ground loop. A large LCD with backlight displays both resistance and leakage current simultaneously. The instrument stores up to 100 measurements and includes an auto‑power‑off function. It operates on 4×AA batteries (approx.1000 hours). Clamp on earth resistance tester meets IEC 61557‑5 standards. Operating temperature: 0°C to 40°C, humidity<90%RH.
Product Parameters
|
Parameter |
Value/Specification |
|
Model |
NRD100D |
|
Resistance range |
0.01–1000Ω |
|
Resistance accuracy |
±1.5%±0.05Ω(0.01–200Ω); ±3%(200–1000Ω) |
|
Resolution |
0.01Ω |
|
Leakage current range |
0.1 mA–30 A |
|
Leakage current accuracy |
±2%±0.1 mA |
|
Jaw opening |
32 mm |
|
Maximum conductor diameter |
30 mm |
|
Data storage |
100 records |
|
Display |
LCD with backlight, 4‑digit |
|
Power supply |
4×AA batteries (1.5V) |
|
Battery life |
~1000 hours (without backlight) |
|
Dimensions(W×D×H) |
410×340×190 mm (case included) |
|
Gross weight |
4.8 kg (including accessories) |
|
Operating temperature |
0°C–40°C |
Key Advantages
- Non‑contact measurement: No need to disconnect the ground rod or drive auxiliary spikes.
- Fast and safe: Clamp‑on design reduces test time and eliminates hazard of high‑current injection.
- Dual function: Measures both earth resistance and leakage current.
- Memory & interface: Stores 100 results and exports via USB.
- Auto‑ranging: Automatically selects the best range.
Applications
- Quick earth resistance checks in multi‑ground systems(e.g., towers, distribution poles)
- Ground loop resistance measurement in office buildings, data centers
- Lightning protection system verification where disconnection is not practical
- Leakage current monitoring to detect insulation degradation
Related Products
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FAQ
Q1: Can the Clamp on Earth Resistance Tester measure earth resistance on a single‑rod system?
A: No, the clamp‑on method requires a complete loop (e.g., multiple grounds connected in parallel). For isolated single rods, use a traditional 3‑point tester like NR3002E.
Q2: What is the minimum measurable resistance?
A: 0.01Ω, with a resolution of 0.01Ω.
Q3: Does the tester automatically turn off?
A: Yes, after approximately 10 minutes of inactivity to save battery life.
Q4: Is Clamp on Earth Resistance Tester suitable for high‑voltage substations?
A: Yes, the jaw is insulated for use on low‑voltage conductors. However, do not clamp around high‑voltage live wires. Use only on the grounding conductor.
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