IEEE C50.12-2025

This standard contains requirements for all types of 50 Hz and 60 Hz synchronous generators and generator/motors rated 5 MVA and above to be used for hydraulic turbine or hydraulic pump/turbine applications. Generators and generator/motors below this rating are generally covered by NEMA MG 1-2021[B23].

The purpose of this standard is to establish a base set of accepted requirements for 50 Hz and 60 Hz electrical generators and generator/motors rated 5 MVA and above driven by hydraulic turbines or pump/turbines that can be used in the specification of a new generator or generator/motor. It is also intended that the standard provide guidance for determining other requirements that may stem from coordination with the specific application including the prime mover characteristics, site conditions, and system interconnection details.

Revision Standard - Active. This standard contains requirements for all types of 50 Hz and 60 Hz synchronous generators and generator/motors rated 5 MVA and above to be used for hydraulic turbine or hydraulic pump/turbine applications.