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Grounding system is the most basic safety line of all power equipment, especially in overseas engineering projects distributed in Southeast Asia. Many project teams only pay attention to the configuration of main equipment such as transformers and distribution cabinets, but despise the importance of grounding design, resulting in unqualified grounding resistance, irregular laying and insufficient grounding area.
In tropical thunderstorm-prone and high humidity environment, non-standard grounding will lose the functions of leakage discharge, lightning current diversion and personal safety protection, easily causing equipment overvoltage damage and electric shock accidents.
| Grounding Design Link | Common Non-standard Phenomenon | Hidden Danger Caused | Standard Construction Requirement |
|---|---|---|---|
| Grounding Material Selection | Use thin ordinary steel instead of anti-corrosion grounding materials | Easy corrosion and fracture in humid salt fog environment | Use hot-dip galvanized or copper grounding materials with anti-corrosion performance |
| Grounding Network Laying | Random buried laying, insufficient buried depth and spacing | Poor current dispersion, excessive grounding resistance | Standard buried depth and grid spacing, ensure overall equipotential connection |
| Equipment Access Grounding | Single-point random connection, thin connecting wire | Leakage current cannot be discharged smoothly | Use matched wire gauge, firm connection, avoid series connection in disorder |
| Resistance Detection | No regular detection after construction, ignore humidity influence | Resistance exceeds standard in rainy season, lose protection effect | Test grounding resistance every quarter, adjust and optimize if exceeding limit |
| Coastal Special Treatment | No extra anti-corrosion measure for coastal soil | Grounding body corroded rapidly and fails in short term | Add anti-corrosion coating and special soil improvement for coastal projects |
Standardized grounding design is not only to meet project acceptance standards, but also to ensure long-term stable operation of power equipment and personal safety on site. All overseas engineering projects should take grounding construction and regular detection as compulsory standard procedures, and never treat it as trivial auxiliary work.
