	Applies To
	Product(s):	WaterGEMS, SewerGEMS, CivilStorm, StormCAD, PondPack, SewerCAD, HAMMER, WaterCAD
	Version(s):	08.11.XX.XX
	Original Author:	Mark Pachlhofer, Bentley Technical Support Group

Problem

How can I simulate a flywheel on a pump to reduce a transient?

Solution

A flywheel can be simulated by increasing the inertia on the transient tab in the pump definitions manager (Components > Pump Definitions).

Please make sure to keep this information in mind when considering using a flywheel for protection against a transient:

a) They are usually big and heavy, so the pump station needs to be designed to accommodate them

b) They require extra energy each time you start the pump. As a result of the extra energy required the pump may need a larger motor