Leave your message
- Leon Zhang sales consultant
- Email: zxl635973785@gmail.com
- Phone/WhatsApp/Wechat: +86 13655813266
HF-GT-212 Ground Grid Tester
This portable ground grid tester is designed for substation and power plant grounding system inspection. It precisely measures grounding resistance, soil resistivity, step & touch voltage with strong anti-interference capability, supporting data storage and report printing for lightning protection safety assessment.
Send your requirements, we will quote for you within 12 hours
The Ground Grid Tester is a professional portable testing instrument specially developed for power substations, hydropower stations and large industrial grounding systems. It adopts advanced measurement principles to accurately test the overall grounding resistance, soil resistivity, grounding grid potential distribution and step/touch voltage of large-scale earthing grids.
Capable of resisting strong on-site electromagnetic interference from high-voltage equipment, this device delivers stable, precise test results to evaluate the safety performance of grounding networks. It helps engineers judge whether the grounding grid meets power industry standards, guides grounding grid reconstruction and renovation, and effectively prevents lightning accidents, equipment damage and personal electric shock hazards caused by defective grounding systems. Widely applied in power grid operation maintenance, new substation acceptance inspection and lightning protection engineering testing projects worldwide.
Purpose of Ground Grid Tester
This professional testing instrument is mainly used to comprehensively detect various performance parameters of large grounding grids installed in substations, power plants, hydropower stations and industrial parks.
It accurately measures grounding resistance, soil resistivity, step voltage, touch voltage and ground potential rise of the whole earthing system. It evaluates the safety and compliance of grounding networks, checks hidden dangers such as grounding grid corrosion and fracture, provides data basis for grounding grid renovation, lightning protection assessment and power system safety operation, and avoids electric shock accidents and equipment breakdown triggered by unqualified grounding under lightning strikes and short-circuit faults.
Ground Grid Tester Technical Specifications
| Parameter Item | Specifications |
|---|---|
| Measurable Parameters | Ground grid resistance, soil resistivity, touch voltage, step voltage, ground potential rise, grounding impedance |
| Test Current | Adjustable low-frequency high current, strong anti-interference for substation electromagnetic environment |
| Resistance Measurement Range | 0.01Ω ~ 200Ω |
| Measurement Accuracy | ±(0.5% reading + 0.002Ω) |
| Soil Resistivity Range | 0.01Ω·m ~ 10000Ω·m |
| Step & Touch Voltage Range | 0 ~ 100V |
| Working Frequency | Multiple optional frequencies to evade 50Hz power frequency interference |
| Operating Temperature | -10℃ ~ +50℃ |
| Ambient Humidity | ≤90% RH, no condensation |
| Power Supply | Built-in rechargeable lithium battery + AC 220V external power supply |
| Display & Function | Large touch LCD screen, data storage, curve plotting, built-in thermal printer for test reports |
| Housing | Portable waterproof & shockproof plastic case, ideal for outdoor field tests |
FAQ for Ground Grid Tester
Q: What is a Ground Grid Tester used for?
A: The Ground Grid Tester is a professional field testing instrument for power substations, power plants and industrial grounding systems. It accurately measures grounding resistance, soil resistivity, step voltage, touch voltage and ground potential rise. It is widely used to detect grounding grid defects, evaluate lightning protection performance and ensure safe operation of power systems.
Q: Why does the tester use low-frequency testing current?
A: On-site substations contain strong 50Hz power frequency interference. The low-frequency testing design effectively avoids stray current interference, ensuring stable and accurate test data in complex high-voltage electromagnetic environments.
Q: What problems will high grounding grid resistance cause?
A: Excessive grounding resistance prevents fault current and lightning current from dissipating quickly. It will cause dangerous step voltage and touch voltage, resulting in electric shock risks, equipment damage and hidden dangers for power grid operation.
Q: Is the tester suitable for outdoor field work?
A: Yes. The instrument adopts waterproof and shockproof housing, supports wide temperature working range from -10℃ to +50℃ and high humidity environment. It is fully adapted to outdoor field testing all year round.
Q: Does the device support data storage and report printing?
A: The tester is equipped with a high-definition touch screen. It can automatically store test data, generate analysis curves and print professional test reports through the built-in thermal printer, which is convenient for inspection and filing.
Q: What power supply methods are available?
A: It adopts dual power supply design, including built-in rechargeable lithium battery and AC220V external power supply. It supports long-time continuous testing on site and flexible outdoor operation without mains power.
Q: How often should the grounding grid be tested?
A: Regular annual testing is recommended. Additional testing is required after lightning seasons, grounding grid renovation, equipment maintenance and project acceptance to eliminate potential safety hazards.
Q: Does the instrument need regular calibration?
A: Yes. Annual professional calibration is necessary to maintain testing accuracy and ensure all test results comply with national and international power industry safety standards.
Be the first to review “HF-GT-212 Ground Grid Tester”
Reviews
There are no reviews yet.