Recommendation ITU-T K.152 describes the requirements for radiated and conducted emissions from power equipment installed in telecommunication facilities. Power equipment in the scope of this Recommendation include rectifiers that supply direct current (DC) voltages of up to 400 V, power conditioning systems (PCSs) including grid connected power converters (GCPCs), uninterruptible power supplies (UPSs). The power equipment usually includes power conversion devices and may generate conducted and radiated electromagnetic disturbances and cause degradation of the performance of telecommunication systems and this Recommendation aims to prevent.