The grounding downlead continuity tester is crucial for the safe operation of the power system

The grounding downlead continuity tester is crucial for the safe operation of the power system

Whether the grounding down conductors of power plants and substations are well connected to the grounding grid, and whether the grounding electrodes of the grounding grid are intact, are crucial for the safe operation of the power system. In the "25 Key Requirements for Preventing Major Accidents in Power Production" of the former State Power Company, it is required to measure the conductivity of the grounding down conductors and grounding grids of power plants and substations in the effective grounding system once a year. The grounding downlead conductivity tester determines the degree of corrosion of the grounding downlead and grounding grid by analyzing and comparing the changes in previous measurement results, in order to decide whether to excavate or not.
In response to this requirement, our company has developed a grounding down conductor conductivity tester that can quickly and accurately measure the degree of corrosion of two grounding down conductors, in order to detect and eliminate potential accidents early.
The grounding downlead continuity tester is an instrument developed based on the "Power Industry Standards of the People's Republic of China DL/T 845.1~DL/T 845.4-2004" and the "Preventive Test Code for Power Equipment Q/CSG 10007-2004". The reliable and effective connection between the grounding down conductor of power equipment and the grounding grid is the fundamental guarantee for the safe operation of power equipment. Although anti-corrosion treatment has been applied to the connection point of the grounding down conductor during the production of the grounding device, the connection point located in the soil will still be affected by factors such as moisture for a long time, resulting in corrosion, disconnection, and loosening of the contact point. This leads to an increase in the electrical resistance value between the grounding down conductor and the ground grid contact point, which cannot meet the requirements of the power regulations and poses an unsafe risk to the equipment during operation. In severe cases, it can cause the equipment to lose ground and operate.
The grounding downlead continuity tester uses the basic calculation formula R=U/I of the DC circuit and the principle that the current in the series circuit is equal everywhere. It adopts a four wire measurement principle, and the high current constant current output effectively eliminates the influence of the test line resistance on the test results. This instrument is used for both AC and DC, with an LCD display and extremely simple operation and prompt function.

1. The grounding downlead conductivity tester adopts a high-power power supply
2. Stable current output
3. Complete protection functions
4. Easy and convenient operation
5. High precision
6. Fast testing speed
7. Accurate data
8. Good repeatability
9. Intuitive reading
*Greatly reduced the labor intensity of on-site staff.

1. Measurement range: 0.01m Ω -200m Ω Resolution: 0.01m Ω
2. Measurement current: 100A DC
3. Measurement accuracy: Level 0.5
4. Display mode: 12864 Chinese LCD display
5. Current: AC220V
6. Volume: (length x width x height mm) 480 x 350 x 205 (aluminum box)
7. Weight: 6Kg (excluding test line)
8. Environmental temperature: 0~40 ℃