• Model:RTRDU2.0

RTRDU 3 Phase Trickle & Boost 5 Step Speed Controller - 2 Amps

£ 734.99 (excl. VAT)

£ 881.99 (inc. VAT)


A three-phase transformer which controls the fan speed by altering the supply voltage in five fixed steps. The steps are adjusted manually, using the control knobs on the front of the unit.

There are two control knobs: one for higher fan speeds and one for lower fan speeds. Switching between the high and low settings is done by an external change-over contact, which could be a thermostat or a timer.

An integral motor protection device is included which cuts the supply voltage to the fan if the thermal contact in the fan motor is activated. The unit is reset by turning the switch to 0 for 10 seconds, after which the unit restarts.

Input terminals for room thermostat RT cuts supply voltage to the fan when the circuit is broken. Terminals are linked before delivery. The indicator lamp on the front shows when the transformer is in operation.

The transformer has 230V terminals for operating dampers, electric heater batteries or other external equipment. These terminals have no current when the transformer switch is in position 0, or when the TK or RT input is open. Supply voltage: 400V 50/60Hz.
PDF Files


Data sheet

2 x Elta Variable Speed Drive IP66 - 2.2KW2 x Elta Variable Speed Drive IP66 - 7.5KW1 x FU 15 40 Frequency Inverter1 x FRQ5-4A V2 Inverter Speed Controller1 x FRQ-10A V2 Inverter Speed controller1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 22 25 Frequency Inverter2 x Elta Variable Speed Drive IP66 - 1.5KW3 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter RUCK - FU 075 201 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 0.75KW1 x ELTA - Three Phase Transformer 3amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Three Phase Transformer 10amps2 x FRQ5-10A Inverter Speed controller1 x Elta 10 Amp Electronic single phase speed controller.1 x FU 15 16 Frequency Inverter2 x Elta Variable Speed Drive IP66 - 5.5KW1 x FU 075 04 Frequency Inverter (IP20)1 x NKS-D swirl diffuser v-300 x 300mm1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1001 x PCA Diffuser - PCA-3151 x Balance S Diffuser - NO RING - 125mm1 x ELTA - Single Phase Transformer 2amps2 x Round ceiling diffuser 400mm1 x JSR 200 Painted RAL50181 x Curved Blade Grille 600x600 (2way blow)3 x Electronic extractor fan speed controller - FSC 1.53 x EC6H - Reversible Group Fan Electronic Controller1 x Circular Ceiling Diffuser - TST 1601 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Balance S Diffuser - NO RING - 100mm1 x Elta 2 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 8amps1 x ELTA - Single Phase Transformer 16amps1 x Elta 6 Amp Electronic single phase speed controller with TK1 x Round ceiling diffuser 200mm3 x Elta 3 Amp Electronic single phase speed controller with TK1 x EFSC-3N- Single Phase Speed Control1 x Airvent ceiling fan controller1 x Round ceiling diffuser 300mm1 x Elta 3 Amp Electronic single phase speed controller.1 x Round ceiling diffuser 250mm1 x Round ceiling diffuser 350mm1 x ELTA - Single Phase Transformer 4amps2 x AIRVENT speed control - AIR4019611 x ELTA - Single Phase Transformer 12amps1 x COM-31 x PCA Diffuser - PCA-2502 x Elta 6 Amp Electronic single phase speed controller.1 x EFSC-6N- Single Phase Speed Control1 x ELTA - Single Phase Transformer 10amps3 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A1 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer3 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B2 x 7 Day Programmable TIMECLOCK1 x TTC-2000 Three phase electric heater controller1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x ACOAS/ AC/EC Auto Changeover 8Amp3 x ACO8AC/EC AutoChangeover panel1 x EC-Vent control board1 x Elta ACO Panel 149-ACO14E1 x CONTROL ECOWATT - Basic1 x ACO 149-ACO1/EDV1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x EC-Vent Room Unit1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Elta ACO Panel 149-ACO18B1 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT3 x Systemair Save Connect 2.0 Internet Module1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Easy-fix termination kit - High Rise Ventilator - EFT1 x EM30-24 Control Panel Commissioning Service1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x Elta Wall Cowl SWC56/631 x Elta Wall Cowl SWC35/401 x GRA-100 External Grill by S&P1 x Elta Louvre Shutter - 400mm1 x Elta Wall Cowl SWC45/501 x Elta Wall Cowl SWC25/311 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 7101 x Jet Cowl - 315mm2 x Single phase speed controller by auto-transformer - RMB 3.5 Amp1 x Speed Controller - REB12 x UB47- Universal Insulated Terminal1 x Biflow SB400-CON2-3 - High Temperature Bifurcated Fan2 x Potentiometer EGH 01 - for DDMP Fans2 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan3 x Remote controller FLEX - for VEKO INT2 x REU 1.5amp Speed control - Two Speed Five-Step Transformer - Trickle and Boost1 x Helios TSW 7.5 Amp Transformer speed controller2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x Helios TSW 3 Amp Transformer speed controller1 x RDS 11 Helios Transformer Controller With Motor Protection1 x Vent Axia ACM 100 inline mixed flow duct fan2 x DEF-140T Inlet Guard for the CBT-100N2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x TG-K3/NTC10-01 - Duct temperature sensor2 x Speed Controller - REB52 x Commercial Single or 3 phase Fan Reversing Switch - RS12 x FAST-TRACK RANGE 75mm - Click Ring (1 bag of 10)1 x Transformer (silent) speed controller - RE 5.0 Amp1 x Transformer Speed Control - RTRE- 7.0Amp2 x CBM 9-9 550w 4P VR (Open Motor)2 x Speed Controller - REB1-N2 x MEV Spider Wireless boost Switch - MEV-SWH-W4 x MTP 10, 10K, Speed control1 x Bathroom Fan -Envirovent- Silent 100 T (Timer Model)1 x PIR Sensor - PIR21 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt CVR1 x PIR Sensor - PIR41 x VTR 300 STD Filter Kit2 x Speed Controller - REB2.5-N1 x DDMP 12-12 3F 1810W M6A4 DG02 x CBT-100N Centrifugal1 x Contactor Interface Station - CI92 x Mini Diffuser - 100mm2 x Silentub - STUB 1001 x Compact SCD450/4-1AC2 x EBM-Papst D3G133-BF05-14 Double inlet4 x CBM Low Pressure Centrifugal Fan - CBM 12/12 6 Pole 736watt CVR1 x AXC TP - 100mm Plastic Centrifugal Inline Fan2 x TD160-NT Mixvent - 100mm - TD160 Timer1 x CBA-100 Inlet Flange for CBT-1001 x CBT-130N Centrifugal ATEX II 3D ExtD 125*C1 x CO2 Room Sensor - CO2-R2 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x Temperature Fan Speed Controller - ATCP4-WMS2 x Transformer 5 Speed Controller - ATC1-4TK2 x Transformer 5 Speed Controller - ATC1-10TK2 x Transformer 5 Speed Controller - ATC1-8TK1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Helios TSW 1.5 Amp Transformer speed controller2 x Vent Axia ACM 125 inline mixed flow duct fan2 x CS2 Current Switch1 x Isolator Switch - ISOSW1 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x MWS 3 – Transformer Controller With Motor Protection2 x TEM 075 - 5 Speed Transformer Speed Control1 x Single phase speed controller by auto-transformer - RMB 8.0 Amp2 x Two Speed Switch - REGUL-21 x Helios HQW-200/2 - IP551 x Vent Axia T-Series Controller1 x Transformer Speed Control - RTRE- 12.0Amp1 x Transformer (silent) speed controller - RE 3.0 Amp1 x Helios HQW-630/4 - IP551 x CBS-60 Outlet Flange for CSB/CBT-601 x Speed Controller - REB31 x Transformer (silent) speed controller - RE 1.5 Amp2 x Skyflow SSR Horizontal Roof Cowl SSR31/35B1 x Transformer Speed Control - RTRE- 5.0Amp1 x Skyflow SSR Horizontal Roof Cowl SSR31/35BS2 x Helios HQW-315/4 - IP551 x CBA-60 Inlet Flange for CBT-603 x QPTW 250C Acoustic Twin Fan with Controller1 x Vent Axia Silent 100T (TIMER)2 x DEF-CBM-RE-7 - Protection Guard1 x DDMP 09/09 Mounting Flange1 x ENV 100 12v transformer SELV1 x CBM Low Pressure Centrifugal Fan - CBM 10/10 4 Pole 550watt VR1 x Quietflow SQS100-1ECL - Centrifugal Box Fan2 x VEKA INT 2000/15.0-L1 EKO1 x CBM Low Pressure Centrifugal Fan - CBM 9/7 4 Pole 373watt CVR2 x Helios RR-250-C Centrifugal inline fan1 x Polyurethane Foam Media - 10PPI - Filter Media Sheets - Size: 2000mm x 1000mm1 x Electrostatic Precipitator - 1H x 3W1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x Duct Termination with Mesh - 100mm1 x Flakt Woods ME 1.6 speed controller 6.0amp - EA9011591 x SD-MUB Vibration pad set1 x Flakt Woods ME 1.3 speed controller 3amp - EA9011581 x WSD 100 (1060x1060x70)
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

Excellent low noise fan, I've got one unit running years and...