This part of IEC 61800 specifies requirements for adjustable speed power drive systems, or
their elements, with respect to electrical, thermal and energy safety considerations. It does
not cover the driven equipment except for interface requirements. It applies to adjustable
speed electric drive systems which include the power conversion, drive control, and motor or
motors. Excluded are traction and electric vehicle drives. It applies to d.c. drive systems
connected to line voltages up to 1 kV a.c., 50 Hz or 60 Hz and a.c. drive systems with
converter input voltages up to 35 kV, 50 Hz or 60 Hz and output voltages up to 35 kV.
Other parts of IEC 61800 cover rating specifications, EMC, functional safety, etc.
The scope of this part of IEC 61800 does not include devices used as component parts of a
PDS if they comply with the safety requirements of a relevant product standard for the same
environment. For example, motors used in PDS shall comply with the relevant parts of
IEC 60034. 
Unless specifically stated, the requirements of this International Standard apply to all parts of
the PDS, including the CDM/BDM (see Figure 1).
NOTE In some cases, safety requirements of the PDS (for example, protection against direct contact) can necessitate the use of special components and/or additional measures.