DWY-H Ground Grid Grounding Resistance Tester
Features
1.Excellent Power Frequency Equivalence: Utilizes sinusoidal test currents at 45Hz/55Hz (±5Hz deviation from 50Hz).
2.Superior Interference Immunity: Variable-frequency measurement combined with advanced hardware/software filtering ensures stable, reliable data.
3.High Precision: Basic error ≤0.005Ω, suitable for large-scale grounding grids with minimal impedance.
4.Multi-Functional Capability: Measures current poles, voltage poles, grounding resistance, step voltage, and touch voltage.
5.Intuitive Operation: Chinese menu-driven interface with direct measurement display.
6.Minimized Wiring Labor: Eliminates heavy-current cables during deployment.
Overview
This instrument is designed for measuring power frequency characteristics of grounding devices, including grounding impedance, touch voltage, step voltage, and soil resistivity. It supports multiple applications: substation grounding grids (4Ω), hydro/thermal power plants, microwave stations (10Ω), and lightning rods (10Ω).Utilizing variable-frequency anti-interference technology, it delivers precise 50Hz power frequency measurements in high-noise environments. With a maximum test current of 5A, it prevents excessive potential elevation during operation. Its superior interference resistance enables live-grid measurements without power interruption.
Technical Parameter
| Impedance Measurement Range |
2~200Ω |
| Resolution |
0.001Ω |
| Accuracy |
±(1% of reading+0.002Ω) |
| Ground Voltage Interference Immunity |
≤0.002Ω error under 30V power-frequency interference (test current ≥3A) |
| Test Current Waveform |
Sine wave |
| Test Frequency |
45Hz,55Hz dual-frequency |
| Max Output Current |
1A/3A/5A(optional) |
| Maximum Output Voltage |
Current line: Copper core cross-section ≥2.5mm² |
| Measurement Cable Requirements |
Voltage line: Copper core cross-section ≥2.5mm² |
| Power Supply |
AC220V±10%,50Hz |
Main Product
Company Profile
Wuhan Huadian High-tech Electrical Equipment Co.,Ltd(Huadian Hi-Tech), established in 2007, is specialized in R&D, production, sales, and technical services for high-voltage test equipment, power metering instrument and transformer substation detection system, while delivering professional comprehensive one-stop electrical testing solutions.
Our core business spans ten product lines, including series resonance test system, circuit breaker test equipment, transformer test equipment, high-voltage test equipment, relay protection test devices, secondary circuit test equipment, cable/surge arrester test equipment, grounding/insulation test equipment, power metering test equipment, oil/SF6 detection equipment. With continuous innovation, we own proprietary patented technologies and multiple utility model patents. All products strictly comply with international/national standards and industry regulations, certified by national/provincial/municipal power authorities, and fully meet ISO 9001 Quality Management System requirements.
Our products serve more than 30 industries including energy, railways, petrochemicals, and environmental protection. Our service network covers China and extends to international markets like India, Pakistan, and Africa. As an integrated high-tech enterprise, we uphold the principle of "Precision Engineering, Quality First" combining advanced R&D, precision manufacturing, and technical services to provide safe, reliable, and intelligent testing solutions.
Our Advantages
Certifications
Partners
Service System&Shipping
FAQ
1.When can l get the price?
We usually quote within 6 hours after we get your inquiry. If you are very urgent to get price, please call us or tell us in your email so that we will regard your inquiry priority.
2.Whether the products can be customized?What about the leading time for production?Whether they can be customized?
After the goods have been ordered, we can be made to order according to the special requirements of customers by using the latest technology.
Honestly, it depends on the order quantity and the product. Usually our leading time is 7 working days after order confirmed.
3.What is your terms of delivery?
We accept EXW, FOB, CFR, ClF, ect. You can choose the one which is the most convenient and cost effective for you.
4.How much will be the shipping cost and time?
This will depend on the size of your goods and the method of shipping (by sea/ by air/by Express) and your designated port or air port, We will be grateful if you can spare us some minutes to help us since it will enable us to evaluate the cost based on the information provided.
5.Could you please tell me the Warranty Period of your product?
Our warranty period is one year free and lifelong maintenance, and if the product we sell is damaged (if not man-made damage), in the first year, we will send free parts for replacement. Over the warranty, maintenance is paid service.
6.What kind of Certificate can you provide?
We can provide the CE mark, lSO 9001 quality certificate,the third party calibration certificate(CNAS), factory test report.
7.Do you have Technical Backup to all customers from different countries?
To be surely, our technical support is always available and quick response. We are manufacturer of so much on site testing experience and understand how to deal with your problems.Moreover, our engineers can go to your country to support if need.
8.How long is the offer valid?
30 days.
9.How can I supplement the vulnerable and consumable parts? What should I do with some broken parts?
If such a situation occurs, please contact us in time, we can provide vulnerable and consumable parts and spare parts supplement, and only charge the cost.
10.What is your terms of payment ?
Payment<=1000USD, 100% in advance.
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