For hydrogen stations, what is the general range of ground resistance?
Thread Content
I would like to ask everyone, what is the general range of ground resistance for hydrogen stations? If it exceeds the range, what should be done?
The grounding resistance value is not greater than 4 ohms
1. The hydrogen station and outdoor tank area should be equipped with direct grounding devices, the grounding resistance should not be greater than 4, and the grounding network should be connected to the main factory grounding network. 2. Indoor metal pipes, metal frames, cable metal casings, and outdoor overhead hydrogen pipes should all be grounded, and pipe flanges (larger than 4 holes) should be connected with metal wires. 3. Hydrogen pipelines laid aerially outdoors should be grounded every 20m to 25m to prevent lightning induction, and the grounding resistance should not be greater than 10 ； Buried hydrogen pipelines should be connected to lightning protection induction grounding devices at the entrance and exit of the building.
Generally, the grounding resistance is not large and is 4 ohms.
Generally, the grounding resistance is small and 4 ohms, building lightning protection design specification GB50057-1994_2