1) generating set
2) generating unit
3) power generating set
a group of rotating machines transforming mechanical or thermal energy into electricity
GRM: n. (1,2,3)
Note: it consists of a prime mover coupled to an electrical generator, complete with associated switchgear
References:
SEE motor set
SPE base load set
SPE controllable set
SPE emergency power generating set
SPE emergency generating group
SPE hydroelectric set
SPE peak load set
SPE thermal generating set
SPE stand-by generator

ENERGY TERM COURTESY OF ENERGY.EU