fans for atex explosive atmospheres and other applications - Sodeca

ACCESSORIESRFTRFMFeatures:• The RFT converter series are suitable to vary thespeed, via voltage and frequency, of axial andcentrifugal fans with 400V three-phase motors.Converter power supply: 400V three-phase.50/60 Hz.• In accordance with Electromagnetic CompatibilityDirectives 92/31/EEC and 93/68/EEC and inaccordance with Low Voltage Directive 73/23/EECFrequency converter for 400V three-phase motors.Features:• The RFM converter series are suitable to vary thespeed, via voltage and frequency, of axial andcentrifugal fans with 230V three-phase motors.Converter power supply: 230V single-phase.50/60 Hz.• In accordance with Electromagnetic CompatibilityDirectives 92/31/EEC and 93/68/EEC and inaccordance with Low Voltage Directive 73/23/EECModel RFT-0,5 RFT-1 RFT-2 RFT-3 RFT-5,5 RFT-7,5 RFT-10 RFT-15 RFT-20 RFT-25 RFT-30Motor (C.V.) 0.5 1 2 3 5.5 7.5 10 15 20 25 30(kW) 0.37 0.75 1.5 2.2 4 5.5 7.5 11 15 18.5 22Current (A) 1.25 2.5 4 6 9 12 16 24 30 39 45kVA 0.95 1.9 3 4.5 6.9 9.1 12.2 19.1 23.9 31.1 35.9InputThree-phaseVoltage (V) 3 x 380…480 V (-15% +10%)Frequency (Hz) 50 – 60 Hz (± 5%)OutputThree-phaseVoltage (V) 3 x 380…480 VFrequency (Hz) 0….400 Hz 0...120 HzBraking torque 20% (with external resistance: 100%, 150%)Braking unit Incorporated in the equipment OptionalSize Width (W1) mm 70 70 100 140 140 180 180 200 250 250 304Height (H1) mm 128 128 128 128 128 220 220 284 385 385 460Depth (D1) mm 130 130 130 155 155 170 170 182 201 201 234Weight (Kg) 0.76 0.77 1.12 1.84 1.89 3.66 3.66 6 12.5 13 20Method of refrigerationForced airModel RFM-0,5 RFM-1 RFM-2 RFM-3Motor (C.V.) 0.5 1 2 3(kW) 0.37 0.75 1.5 2.2Current (A) 2.5 5 8 12kVA 0.95 1.9 3 4.5InputSingle-phaseVoltage (V) 2 x 200 ÷ 230 V (±10%)Frequency (Hz) 50 – 60 Hz (± 5%)OutputThree-phaseModel RFM-0,5 RFM-1 RFM-2 RFM-3Voltage (V) 3 x 200 ÷ 230 VFrequency (Hz) 0-200Hz 0-400Hz 0-400Hz 0-400HzRFI FilterBuilt inSize Width (W1) mm 68 79 156 156Height (H1) mm 128 143 143 143Depth (D1) mm 115 143 143 143Weight (Kg) 0.95 0.97 1.94 2.00Method of refrigeration Radiator Forced air Forced air Forced air1. In general, all SODECA fans with athree-phase motor under normal operatingconditions are suitable for working suppliedwith a static frequency converter (in accordancewith IEC 60034-17). Nevertheless, some motorsrequire special measures.The maximum operating frequency or speed mustnever exceed that for which the fan has beendesigned. In applications with quadratic torquessuch as fans and pumps, when the speed variesthe absorbed power is directly proportional to thecube of the rotating speed: Pa 2= Pa 1(n 2/ n 1) 32. The insulation of motors coupled to fans issufficient to work without restrictions with afrequency converter up to voltages of < 500 V.The use of sinusoidal filters at the converteroutput will help the motor to operate properly,reducing breakdowns and increasing the fan’sservice life.It is recommended that, for motors of sizes > 225,they be ordered with special windings to workwith a frequency converter.3. The length of the wires running from theconverter to the fan have a particular influenceon voltage characteristics at the motor terminals.The definition of "long wires" will depend onthe nominal value and the converter type. Themanufacturer’s technical documentation must beconsulted.4. EEx-d flame-resistant motors must be orderedfor operation using a frequency converter. Themotor manufacturer will request information aboutthe application via a questionnaire in order toestablish the working parameters. These motorsmust also be fitted with PTC probes.5. EEx-e increased safety motors cannot beoperated with a frequency converter (a jointmotor-converter certification would be requiredfor this).121