E-Options - Alfa Laval - ABC

Products descriptionOptionFan Speed Control(BF)Working descriptionLinear regulation of the fan speed: the variation of the input signal corresponds, proportionally, to aconstant variation of the voltage supplied to the load. In practical terms this means that significantchanges of the fan speed will be performed.Features&BenefitsDisadvantages-Good regulation of the condensing pressure/water -Motor hum on "low rpm" fans (8-12 poles);temperature;-low noise;-No considerable energy saving-low cost regulation system"ON/OFF" regulation of fan/couple of fans according to the input signal (unrefined regulation);Fan Step Control (BT)Features&Benefits-low cost regulation system-Digital input for enabling remote ON/OFF, etc.Disadvantages-No continuous control; the variation of the speedis only possible by Y/D change-over;Frequency ConverterControl (BI)The continuous regulation of the fan speed is performed by the modulation of the frequency of thepower supply, according to the input signal. The inverter is already equipped with all poles effectivesinus filter.Features&BenefitsDisadvantages-"High efficiency" regulation system and-lack in the BI range (only for