• Model:RTRDU2.0

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

£ 778.28 (excl. VAT)

£ 933.94 (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

1 x Speed Controller - REB1-N1 x BEAS-control module1 x Silent 300 CZ Design PLUS Extractor Fan1 x QPTW 250C Acoustic Twin Fan with Controller1 x RDH Flange - 03151 x DS-2 2-Speed Switch (3 Phase)1 x CAD-COMPACT 500 ADVANCED N8 - MVHR unit1 x FU 15 40 Frequency Inverter1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 7.5KW1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Elta Variable Speed Drive IP66 - 0.75KW1 x FU 22 25 Frequency Inverter1 x FU 075 52 Frequency Inverter (IP20)1 x FRQ5-4A V2 Inverter Speed Controller1 x FRQ-10A V2 Inverter Speed controller1 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FRQ5-10A Inverter Speed controller1 x FU 15 16 Frequency Inverter1 x Elta Variable Speed Drive IP66 - 5.5KW1 x Elta Variable Speed Drive IP66 - 1.5KW1 x Elta Variable Speed Drive IP66 - 4.0KW1 x Frequency converter FU 075 14 - IP661 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x FU 075 04 Frequency Inverter (IP20)1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x ELTA - Three Phase Transformer 10amps1 x Elta 10 Amp Electronic single phase speed controller.1 x ELTA - Three Phase Transformer 3amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x ELTA - Single Phase Transformer 2amps1 x NKS-D swirl diffuser v-300 x 300mm1 x Circular Ceiling Diffuser - TST 1251 x Circular Ceiling Diffuser - TST 1001 x Electronic extractor fan speed controller - FSC 1.51 x PCA Diffuser - PCA-3151 x Balance S Diffuser - NO RING - 125mm1 x EC6H - Reversible Group Fan Electronic Controller1 x Round ceiling diffuser 400mm1 x Curved Blade Grille 600x600 (2way blow)1 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Elta 2 Amp Electronic single phase speed controller.1 x JSR 200 Painted RAL50181 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x EFSC-3N- Single Phase Speed Control1 x ELTA - Single Phase Transformer 16amps1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Balance S Diffuser - NO RING - 100mm1 x Elta 3 Amp Electronic single phase speed controller.1 x Airvent ceiling fan controller1 x Round ceiling diffuser 200mm1 x ELTA - Single Phase Transformer 12amps1 x COM-31 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x Elta 6 Amp Electronic single phase speed controller.1 x Round ceiling diffuser 250mm1 x EFSC-6N- Single Phase Speed Control1 x PCA Diffuser - PCA-2501 x Round ceiling diffuser 350mm1 x ELTA - Single Phase Transformer 10amps1 x Remote Timer Control - 13511 x Run On Timer - 5s - 4hrs - RT5A1 x Push Timer Switch - ZA41 x Helios ZNE Electronic Fan Overrun Timer1 x Time Delay Unit - DT20B2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x TTC-2000 Three phase electric heater controller1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x ACO8AC/EC AutoChangeover panel1 x 7 Day Programmable TIMECLOCK1 x Elta ACO Panel 149-ACO14E1 x CONTROL ECOWATT - Basic1 x EC-Vent control board1 x EM30-24 Electro-Mechanical Control Panel1 x ACO 149-ACO1/EDV1 x U-EK plastic housing IP65 - for use with the U-EK230E Motor Protection1 x Elta ACO Panel 149-ACO18B1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x Speed Controller - REB51 x Systemair Save Connect 2.0 Internet Module1 x EC-Vent Room Unit1 x Remote controller FLEX - for VEKO INT1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans1 x Helios TSW 7.5 Amp Transformer speed controller1 x Vent Axia ACM 150 inline mixed flow duct fan
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