Tell me which area you want to focus on to ensure your assemblies are fully compliant.
Use Annex C of the standard to define the interface characteristics (Voltage, Current, Environment).
While summaries provide a high-level view, the official IEC 61439-1 PDF is the only source for: Specific mathematical formulas for thermal calculations. Exact clearance tables for different voltage ratings. Detailed testing protocols for short-circuit withstand.