Elta SSDL500-3EC-R Singleflow Centrifugal Box Fan Three Phase EC - 500mm (rectangular spigots)

The Elta SSDL500-3EC-R is a 500mm Singleflow SSDL centrifugal box fan with rectangular inlet and outlet spigots and no terminal box. It moves up to 6552 m³/h in free air, 5868 m³/h at 200 Pa and still 4320 m³/h at 500 Pa, the highest pressure in Elta's published table.A three phase EC external rotor motor (380-480V 50/60Hz) drives a backward curved impeller balanced to ISO1940-1, at up to 1555 rpm with an integrated commissioning control for setting speed. The 1.2mm galvanised steel casing is acoustically lined and suitable for external mounting, the IP44 motor has sealed for life bearings and runs in air from -20°C to +60°C, and Elta backs it with a 12 month warranty. 3 Phase EC Motor Up to 6552 m³/h Speed Controllable What it is best used forThe most powerful SSDL, for warehousing, factories, industrial units and large commercial kitchens with a three phase supply and a high resistance 500mm duct system. It moves 6228 m³/h at 100 Pa and still 4320 m³/h at 500 Pa, close to double the single phase 500 at that pressure.It needs a 380 to 480V three phase supply; on a single phase site use the SSDL500-1EC instead. It is not suitable for corrosive or explosive atmospheres, and the airstream must stay within -20°C to +60°C.Why choose this over alternativesThis is the 500mm SSDL with rectangular spigots. Pick this version when the fan connects to rectangular ductwork, so you avoid a fabricated circular to rectangular transition on each side. The fan, motor and performance are identical across the four versions, so the choice is only about duct shape and wiring. The same size is also available as Elta SSDL500-3EC (circular spigots), Elta SSDL500-3EC-T (circular spigots with terminal box) and Elta SSDL500-3EC-RT (rectangular spigots with terminal box).Against the single phase Elta SSDL500-1EC-R it gives more air everywhere on the curve and the gap widens with pressure: 6228 against 5184 m³/h at 100 Pa, but 4320 against 2192 m³/h at 500 Pa. Peak current is 2.38 A at 400V, ag