Iec 61936-1:2021 ((full))

| Aspect | 2010 Edition | 2021 Edition | |--------|--------------|---------------| | | Basic approach | Enhanced requirements for transient overvoltages and altitude correction | | Arc flash mitigation | General mentions | Dedicated clauses on arc fault containment and personal protective equipment (PPE) alignment | | Earthing systems | Focus on step/touch voltages | Additional guidance on earthing for high fault currents, EMC, and protection against transferred potentials | | Fire protection | Basic separation | Updated requirements for fire barriers, extinguishing systems, and oil-containing equipment | | EMC | Not addressed | New annex on electromagnetic compatibility for control and auxiliary circuits | | Insulation coordination | Based on IEC 60071-1:2006 | Aligned with IEC 60071-1:2019 (new overvoltage factors, phase-to-earth vs. phase-to-phase) | | Renewables | Not considered | Guidance on integration of inverter-based resources (short-circuit characteristics, non-synchronous generation) |