It is sometimes the case that is not possible for a pressure transducer to be placed at a remote point in the system and it can only be located close to

the fan/pump outlet. Flow compensation operates by adjusting the set-point according to the output frequency, which is almost proportional to flow, thus

compensating for higher losses at higher flow rates.

(Required pressure) is the setpoint for closed loop (PI) operation of the frequency converter and is set as for closed loop operation without flow

DESIGN

compensation.

It is recommended to use slip compensation and RPM as unit.

NB!

When flow compensation is used with the Cascade Controller (parameter group 25-**), the actual set-point will not depend on speed

(flow) but on the number of pumps cut in. See below:

There are two methods which can be employed, depending upon whether or not the Speed at System design Working Point is known.

MG.11.N1.02 - VLT

is a registered Danfoss trademark

3 Parameter Description