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The reliable and effective connection between the grounding lead wire and the ground network of the power equipment is the fundamental guarantee for the safe operation of the equipment. Grounding lead is the connection part of the power equipment and ground network, in the long operation process of power equipment, the connection may be affected by moisture and other factors, the contact corrosion, or even fracture and other phenomena, resulting in increased resistance of grounding lead and the main grounding network connection point, which can not meet the requirements of the electric power regulations, so that there is a hidden danger of insecurity in the operation of the equipment, and in serious cases, will result in the loss of the equipment to the ground operation. Therefore, in the 'twenty-five key requirements to prevent major accidents in electric power production', it is clearly proposed that the conductivity testing of the grounding device lead wire should be carried out once a year.
HZDD-20A grounding conductivity tester is a kind of portable tester developed by our company with a high degree of automation, which is used for measuring the conductivity resistance value between the grounding lead wires of each power equipment in the substation. The instrument adopts high-performance microcontroller control, which can realise the intelligent testing process, with small volume, easy to carry, simple operation, high precision, fast testing speed, good re-testing, intuitive reading, and it is the ideal special-purpose instrument in line with the requirements of the regulations.
1. Controlled by high-speed microcontroller, with high degree of automation and easy operation.
2. Adopts brand-new power supply technology, with many current gears and wide measuring range.
3. Intelligent power management technology, the instrument is always working in the minimum power state, effectively reduce the internal heating of the instrument, energy saving.
4. Seven-inch high-brightness touch colour LCD, clear display under strong light, full touch screen operation, Chinese and English free switching.
5. Comes with a perpetual calendar clock and power-down storage, which can store 1000 groups of test data and can be accessed at any time.
6. Equipped with RS232 and USB interfaces, which can communicate with the computer and store in U-disk.
7. Comes with panel type micro printer, which can print the measurement results in Chinese.
8. Android mobile phone or tablet, pay attention to WeChat public number, download the special APP, through the special software to control the whole instrument, test data storage and uploading, easy to access.
| Items | Technical specifications and parameters | Remark |
| Test Current | 1A,2.5A,5A,10A,20A | |
| Test Range | 200μΩ~1Ω (20A) 1mΩ~2Ω (10A) 2mΩ~4Ω (5A) 5mΩ~8Ω (2.5A) 10mΩ~20Ω (1A) |
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| Min. resolution | 0.1μΩ | |
| Accuracy | ±(0.5%±2 digits) | |
| Display | LCD | Resistance display is valid for 4 digits |
| Data Storage | 1000 Groups | |
| Operation Temperature | Operation temperature: 0ºC~40ºC Relative humidity: <90%RH, no condensation | |
| Power Supply | AC 220V±10V,50Hz±1 Hz | Fuse 5A |
| Max. power consumption | 500W | |
| Dimension | Main unit:405×230×355(mm) Line Box:360×260×180(mm)) |
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| Weight | Main unit:15.1KG Line box: 5.75KG | |
| Test Line Length | Standard 13 meters | Length can be customised |
Q1:Is your company a sales or a manufacturer?
We are an integrated trade and manufacturing company with our own factory.
Q2:If we need to customize our own brand or if there are special requirements for the built-in software of the machine, can it be customized?
Yes, we accept OEM/ODM/OBM and can customize the built-in software of the product according to the customer's special requirements.
Q3:What is the usual lead time? How long can we receive the order after placing it?
In normal circumstances, products in stock can be received within 5 to 7 days via the fastest international express. Other situations may vary depending on the quantity of products ordered, whether there are special customization requirements, and the delivery time chosen.
Q4:How can we ensure that the product will not be damaged during transportation, considering the large size of the product?
We have professional internal and external packaging to ensure the safety and stability of the products during transportation. For fragile or other special parts, we will include an extra set to ensure that the customer can use the product immediately upon receipt.
Q5:How do you handle after-sales service? What if there is a quality problem with the product or if the customer does not know how to operate it?
For quality issues that are not caused by human error, we provide a one-year warranty from the time the product is delivered, and lifetime technical support. Other after-sales issues will be addressed by our professional technical staff within 24 hours. The product comes with a user manual and an operation video.
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