This Recommendation specifies emission and immunity requirements for power equipment that is installed inside or on the roof of telecommunication facilities.

This Recommendation applies to equipment including supply systems with embedded power conversion devices (e.g., direct current (DC) to alternating current (AC) inverters, DC to DC, AC to DC and AC to AC converters), power-conditioning systems (PCSs) including grid-connected power converters (GCPCs) and uninterruptible power supplies (UPSs).

Power devices integrated into equipment that directly provides telecommunication services are excluded from the scope of this Recommendation as they are covered by specific electromagnetic compatibility (EMC) Recommendations such as [b-ITU-T K.136] and [b-ITU-T K.137].

This Recommendation specifies measurement methods and limits for emission requirements and immunity requirement to ensure proper operation within the required reliability range. Guidance on any unintentional voltage or current at AC and DC power ports is also provided in this Recommendation.