Power units for propelling a centre pivot are:

 

	Hydraulic water or oil drive - which can be a piston or rotary
	Electric motor drive,
	Mechanical or cable drive
	Air pressure drive

The electric centre pivots require three-phase power in 380 - 415 V.

Also, outlets for 110 or 220 V power should be installed at the pivot point for use with chemical injection equipment or for power tools for repairs.