2020 Hog Slat/Georgia Poultry Retail Product Catalog

164 WWW.HOGSLAT.COM VFD Control Controller converts low voltage from house controller and sends a related signal to a fan motor in hertz. Allows for more accurate control of variable speed and cfm output. VFD Improves Performance of Variable Speed Fans • 240 Volt • Waterproof NEMA 4X enclosure • Manual override #HSFI-1004 .................................................... 1/2 Hp #HSFI-1001 .........................................................1 Hp #HSFI-1002 ........................................................2 Hp What is a VFD fan? VFD or Variable-Frequency Drive is a type of adjustable speed drive used to control motor speed and torque by varying motor input frequency or hertz. Fan motors controlled by VFD are inverter rated, three-phase. How does VFD control speed? An external controller (HSFI-1002) receives a 0 to 10-volt signal from the house controller and sends a corresponding signal to the fan motor in frequency or hertz. What are the advantages of VFD compared to using a triac and voltage regulation to control variable speed fans? 1. More efficient- Slowing a VFD fan down also reduces its energy consumption, unlike voltage regulation. 2. Longer motor life - VFD motors run cooler since the excessive energy normally lost using a triac is not converted to heat. 3. Fewer fans-The lower cfm rates possible with VFD fans mean larger summer fans can also be used for winter minimum ventilation rates. Converting existing fan to VFD Most fans can be changed to VFD by replacing the motor with an inverter rated, three-phase motor and adding a VFD controller. CFM @ .05” Static Pressure 60Hz 52Hz 44Hz 36Hz AS-18EDDLP-V 18” VFD 4490 3910 3230 2380 AS -24EDDLP-V 24” VFD 6820 5980 5010 3810 AS-36EDDLP-V 36” VFD 11730 9870 7710 5360 AS-51XEBDLP-V 51” VFD 25800 22300 17500 11900 AS-54XEBDLP-V 54” VFD 28900 24900 18900 12700 AS-57EBDBP-V 57” VFD 29300 25800 22400 17400 RFI Filters RFI Filters, or radio-frequency interference filters mitigate the high frequency electromagnetic disturbance present on the power and signal lines. #HSFI-RFI ....Radio-Frequency Interference filters