Product Introduction
This UHV-801 Ground Network Earth Resistance Tester utilizes frequency-conversion technology and microprocessor control to accurately measure grounding resistance (4Ω-10Ω), contact/step voltage, and soil resistivity. Featuring 50Hz anti-interference capability and 3A test current, it enables reliable live-grid testing without power outages. The compact design significantly improves efficiency, reducing testing time and labor intensity compared to traditional 30A methods. Suitable for substations, power plants, and lightning protection systems.
 |  |
Product functions:
Ground resistance measurement
Accurately measures the ground resistance of grounding grids, suitable for large grounding systems such as substations and power plants.
Touch voltage testing
Measures the touch voltage of grounding systems, evaluating the safety of equipment and personnel contact.
Step voltage testing
Detects step voltage under grounding fault conditions, providing a basis for grounding system safety assessment.
Soil resistivity testing
Measures soil resistivity, providing data support for grounding grid design, construction, and retrofitting.
Variable-frequency anti-interference testing
Adopts variable-frequency AC testing technology to effectively reduce on-site power frequency interference, improving test stability and accuracy.
High-precision digital measurement
Uses microprocessor and digital filtering technology, with resolution up to 0.001Ω, suitable for high-precision grounding testing.
Key Features of Ground Grid Resistance Tester:
1、Precision Power Frequency Simulation - Delivers accurate sinusoidal waveforms with ±5Hz frequency variation (45Hz/55Hz), ensuring power frequency equivalence in measurements.
2、Advanced Anti-Interference Technology - Combines variable frequency measurement with digital filtering for stable, reliable data even in high-noise environments.
3、Exceptional Accuracy - Achieves 0.005Ω basic error resolution, capable of testing low-impedance grounding systems with precision.
4、Comprehensive Measurement Capabilities - Tests current/voltage poles, grounding resistance, step voltage, and contact voltage in one integrated solution.
5、User-Friendly Interface - Features intuitive Chinese menu navigation with direct measurement readouts for simplified operation.
6、Efficient Field Operation - Eliminates heavy cabling requirements with compact design that doesn't require high-current lines.
Technical Advantages:
• True power frequency simulation
• Superior noise rejection
• Micro-ohm resolution
• Multi-parameter testing
• Simplified workflow
• Lightweight field deployment
Technical parameter
| measurement range | 0～200Ω(including the current pile impedance) |
| resolution | 0.001Ω |
| measurement error | ±(readings×1%+0.005Ω) |
| maximum output voltage | AC 400V (45Hz, 55Hz, dual-frequency, sine wave) |
| maximum output current | AC 5A(45Hz, 55Hz, dual-frequency, sine wave) |
| Output gear | 5 / 4.5/4/3.5/3/2.5/2/1.5/1a, every 0.5A, 9 gears in total |
| anti-interference ability | anti-power frequency 50Hz voltage 10V |
| measurement line requirements | Section area of copper core of current wire ≥ 1.5mm2 |
| Sectional area of copper core of voltage line ≥ 1.0mm2 | |
| power supply | AC220V±10%，50Hz |
| External dimension | 295×340×310mm3 |
| instrument weight | 30kg |
Application Scenarios
Substation grounding grid testing
Used for testing the ground resistance, touch voltage, and step voltage of large substation grounding grids, determining whether the grounding system meets requirements for safe operation.
Power plant grounding system testing
Used for grounding system testing of large power generation facilities such as thermal power plants and hydroelectric plants, ensuring that power generation equipment and plant grounding systems are reliable.
Lightning protection grounding system testing
Used for testing the grounding performance of lightning protection grounding systems for buildings, power facilities, and other structures, ensuring that lightning currents can be safely discharged.
Large grounding grid safety performance testing
Can perform comprehensive testing of ground resistance, touch voltage, and step voltage on large grounding grids, evaluating safety risks to personnel and equipment.
Grounding grid construction, retrofitting, and acceptance testing
Used for on-site acceptance testing after completion of new or retrofitted grounding grids, verifying whether the construction quality and grounding performance of the grounding system meet requirements.
Soil resistivity testing and grounding system design
By measuring soil resistivity, provides a basis for the design of grounding grids and the arrangement of grounding electrodes for substations, power plants, and other projects.
Frequently Asked Questions
Q:What can this Grounding Grid Tester measure?
A:It can measure grounding resistance, contact voltage, step voltage, and soil resistivity, providing comprehensive testing of grounding systems.
Q:Where can this tester be used?
A:It is mainly used for grounding system testing in substations, power plants, lightning protection systems, and other large-scale electrical facilities.
Q:Can it be used for large grounding grids?
A:Yes. It is specifically designed for large grounding grid testing and is suitable for grounding systems in substations and power plants.
Q:Can it measure contact voltage and step voltage?
A:Yes. The tester supports contact voltage and step voltage measurements to help evaluate the safety of grounding systems.
Q:Is it suitable for periodic maintenance of grounding systems?
A:Yes. Power utilities, power plants, and electrical testing companies can use it for periodic inspection and preventive maintenance of grounding systems.
Need a reliable solution for your electrical testing requirements? As an experienced manufacturer and supplier, we provide a wide range of professional testing equipment designed for accuracy, reliability, and long-term performance. Whether you need a single unit or bulk quantities, we can offer flexible solutions and a competitive price to meet your project requirements. Get in touch with us for product details, technical support, and a customized quotation.
