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The standard primarily focuses on ensuring the safety of personnel and the reliable operation of high-voltage (HV) installations, including substations, power plants, and industrial electrical systems. Scope and Application iec 6193612021 link
The 2021 amendment tightened the calculation of and step voltage . You must now model the fault current split between overhead earth wires, cable sheaths, and deep earth electrodes using software (e.g., CDEGS). Scope and Application The 2021 amendment tightened the
You mentioned the "link." In the context of this standard, the "link" is often interpreted as the connection between (the installation standard) and IEC 61936-2 (which covers definitions). Preventing equipment failure and fire propagation
Preventing equipment failure and fire propagation.
Transformer fire separation walls must be 120 minutes fire-rated (REI 120). Oil containment pits require a capacity of at least 100% of the transformer oil volume.
Here is a to understanding and using this standard.