water solutions applications
The default “All in One” application package and the Vacon NXL Multi-Control Ap-plication includes applications for water segment needs as standard:
PID CONTROL for general pumping applications
The PID control is used in applications where it is necessary to keep one variable, for example the pressure in the water mains, constant in spite of changes in the consumption. The actual value can be selected from analogue inputs, fi eldbus or through mathematical functions of these. A direct frequency reference can also be used.
aux. relays
PFC WITH AUTOCHANGE for pumping with several pumps
In PFC with Autochange mode the converter can defi ne which pump takes the control and which pumps are auxiliary pumps. The pumps are alternated automatically by the
frequency converter, guaranteeing equal usage of the system in all load situations. The Water Solutions application package includes unique applications specifi cally developed for water handling needs. These applications are available for Vacon NXS as a loadable software package or can be ordered as factory default.
MULTIMASTER PFC for redundant pumping with severalfrequency converters
The unique Multimaster PFC application handles PFC logic and autochange with one
frequency converter for each pump, providing soft starts and stops also for auxiliary pumps. This in turn results in increased redundancy by allowing the creation of a fully duplicated system from pressure transmitter to pump. Solutions with only one pres-
sure transmitter can also be made.
The Multifollower PFC application is based on the Multimaster PFC with simultaneous control of all
frequency converters instead of one at a time. This results in smoother process control, quieter operation and, in some cases, increased system effi ciency.
LEVEL CONTROL APPLICATION for sewage basins
Based on the unique Multimaster PFC concept, the Level Control Application is de-
signed to control the water level in a sewage tank. The Level Control Application al-
ternates the water level in the tank to reduce the amount of build-up inside the tank. It also maximizes the buffering capacity of the tank to ensure a stable output to the sewage system and sewage treatment process.For more information on Vacon Water Solutions: http://www.water.vacon.com
Vacon Partner Vacon Plc Runsorintie 7, 65380 Vaasa, FinlandTel. +358 (0)201 2121, Fax +358 (0)201 212 205www.vacon.com, email: info@vacon.com BC00113A Subject to changes without notice.
