The latest version, IEC 61936-1:2021 , serves as a global benchmark for ensuring the safety of people, livestock, and property during the operation of high-voltage AC installations. It applies to a wide range of facilities, including: and power stations. Industrial and commercial systems . Offshore generation facilities . Transition towers and poles .
| | Scope | Difference | |--------------|-----------|----------------| | IEC 61936-1 | HV AC >1 kV | General design & erection | | IEEE 80 | AC substation earthing | Only earthing, not full installation | | EN 50522 | Earthing of HV systems | European version, technically similar to IEC 61936-1 earthing part | | IEC 61936-2 | Overhead lines (>1 kV AC) | Dedicated to lines, not substations | iec 61936 pdf
Key technical areas covered in the include minimum clearance distances for live parts, earthing system safety criteria, and protective measures against lightning and overvoltages. Recent Evolution: IEC 61936-2:2023 for DC Systems The latest version, IEC 61936-1:2021 , serves as
| | Key points | |----------|----------------| | Protection against electric shock | Direct & indirect contact requirements, earthing systems, fault clearing times | | Earthing systems | Earth electrodes, earth resistance, touch & step voltage limits | | Clearances & creepage distances | Based on overvoltage category, pollution degree, altitude | | Enclosures & barriers | IP codes, accessibility restrictions for non-electrical personnel | | Fire protection | Separation distances, fire barriers, extinguishing equipment | | LV auxiliary supplies | Requirements for control, protection, and auxiliary circuits | | Switchgear & transformers | Installation conditions, ventilation, access | | Maintenance & operation | Safety signs, work permits, locking/tagging provisions | Offshore generation facilities
The IEC 61936 PDF is a mandatory reference for any professional involved in High Voltage infrastructure. It is technically rigorous and legally significant. However, due to the high stakes of HV safety, users should avoid using unofficial "free" PDFs found on the web, as they may contain errors or be obsolete versions. The investment in the official 2021 standard is necessary for compliance and liability protection.
If you have a about IEC 61936-1 (e.g., “How to calculate earthing grid resistance per this standard?” or “What changed in the 2021 edition?”), I’m happy to answer in detail. Would that be helpful?