• Model:RTRDU4.0

RTRDU 3 Phase Trickle & Boost 5 Step Speed Controller - 4 Amps

£ 799.99 (excl. VAT)

£ 959.99 (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

1 x Helios ESA-1 Surface mounted Speed Control 1amp1 x Elta Variable Speed Drive IP66 - 7.5KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 2.2KW1 x FRQ-10A V2 Inverter Speed controller1 x FRQ5-4A V2 Inverter Speed Controller1 x NKS-D swirl diffuser v-300 x 300mm1 x FU 15 40 Frequency Inverter1 x FU 22 25 Frequency Inverter1 x Helios TSD 5.5 Transformer Speed Control (400v)1 x Elta Variable Speed Drive IP66 - 0.75KW1 x Frequency converter FU 075 14 - IP661 x Circular Ceiling Diffuser - TST 1251 x FU 075 52 Frequency Inverter (IP20)1 x Elta 10 Amp Electronic single phase speed controller.1 x Elta Variable Speed Drive IP66 - 5.5KW1 x Circular Ceiling Diffuser - TST 2001 x FU 15 16 Frequency Inverter1 x ELTA - Three Phase Transformer 10amps1 x PCA Diffuser - PCA-3151 x Elta Variable Speed Drive IP66 - 1.5KW1 x FU 22 04 Frequency Inverter1 x Circular Ceiling Diffuser - TST 1001 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Frequency converter RUCK - FU 075 381 x ELTA - Three Phase Transformer 3amps1 x Round ceiling diffuser 400mm1 x FRQ5-10A Inverter Speed controller1 x FU 075 04 Frequency Inverter (IP20)1 x Balance S Diffuser - NO RING - 125mm1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x Balance S Diffuser - NO RING - 100mm1 x Circular Ceiling Diffuser - TST 1601 x Curved Blade Grille 600x600 (2way blow)1 x JSR 200 Painted RAL50181 x ELTA - Single Phase Transformer 2amps1 x Versio Square Ceiling Diffusers - RS141 x Electronic extractor fan speed controller - FSC 1.51 x Round ceiling diffuser 200mm1 x EC6H - Reversible Group Fan Electronic Controller1 x EFSC-3N- Single Phase Speed Control1 x Round ceiling diffuser 250mm1 x ELTA - Single Phase Transformer 16amps5 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 8amps1 x Elta 3 Amp Electronic single phase speed controller.1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta 2 Amp Electronic single phase speed controller.1 x Airvent ceiling fan controller1 x AIRVENT speed control - AIR4019612 x Remote Timer Control - 13511 x ELTA - Single Phase Transformer 12amps1 x Elta Variable Speed Drive IP66 - 0.37KW (1ph to 3ph)1 x Elta 6 Amp Electronic single phase speed controller.1 x PCA Diffuser - PCA-2501 x EFSC-6N- Single Phase Speed Control3 x COM-31 x Elta Variable Speed Drive IP66 - 0.75KW (1ph to 3ph)1 x Run On Timer - 5s - 4hrs - RT5A1 x ELTA - Single Phase Transformer 10amps1 x Helios ZNE Electronic Fan Overrun Timer3 x Multi Input Run On Timer - 0 - 20min - CFCU3 x Push Timer Switch - ZA41 x Time Delay Unit - DT20B2 x 7 Day Programmable TIMECLOCK1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 5001 x Easy-fix termination kit - High Rise Ventilator - EFT1 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 3551 x S & P Aluminium Axial Fan Louvre Shutter - PER-CR- 6301 x TTC-2000 Three phase electric heater controller1 x ACO8AC/EC AutoChangeover panel1 x EC-Vent control board1 x ACOAS/ AC/EC Auto Changeover 8Amp1 x Elta ACO Panel 149-ACO14E1 x EM30-24 Control Panel Commissioning Service1 x Elta Wall Cowl SWC56/631 x Elta Wall Cowl SWC35/405 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Frequency converter RUCK - FU 075 201 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Frequency converter RUCK - FU 075 212 x Transformer 5 Speed Controller - ATC1-12TK2 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans2 x Vent Axia ACM 150 inline mixed flow duct fan1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)2 x RRB- transformer controller6 x Single phase speed controller by auto-transformer - RMB 1.5 Amp3 x Single phase speed controller by auto-transformer - RMB 3.5 Amp4 x Isolator Switch - ISOSW3 x Helios TSW 7.5 Amp Transformer speed controller3 x Remote controller FLEX - for VEKO INT3 x Helios TSW 3 Amp Transformer speed controller1 x RDS 11 Helios Transformer Controller With Motor Protection4 x Systemair Save Connect 2.0 Internet Module1 x CMT-2 200/80 1.1KW - Single inlet centrifugal fan direct driven1 x Single phase speed controller by auto-transformer - RMB 10.0 Amp1 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 Unit2 x Three Phase Transformer controllers - RMT 1.5 Amp2 x DEF-140T Inlet Guard for the CBT-100N1 x Elta ACO Panel 149-ACO18B1 x BEAS-control module1 x CBS-60 Outlet Flange for CSB/CBT-601 x KMBI 180 Connector rectangular/circular to install on the discharge of CMT1 x Vent Axia ACM 150 T (Timer Model) inline mixed flow duct fan2 x Envirovent Silent MV160/100T Mixvent - Timer Model - 100mm - (5 year warranty)2 x Vent Axia T-Series Controller1 x Envirovent 4 Way Remote Control Switch - SWHBKRF-45 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan2 x S&P MULTI-REG EC FAN CONTROLLER / INTERFACE2 x Transformer 5 Speed Controller - ATC1-10TK2 x Transformer 5 Speed Controller - ATC1-4TK1 x Transformer 5 Speed Controller - ATC1-8TK3 x Vent Axia ACM 200 inline mixed flow duct fan2 x Vent Axia ACM 100 inline mixed flow duct fan5 x Vent Axia ACM 125 inline mixed flow duct fan3 x CS2 Current Switch3 x MWS 3 – Transformer Controller With Motor Protection2 x Helios TSW 0.3Amp Compact Transformer speed controller3 x Helios TSW MCB Amp Transformer speed controller1 x Helios TSW 1.5 Amp Transformer speed controller2 x MV-B Dual Switch for use with Helios HQW plate fans,1 x KMBI 225 Connector rectangular/circular to install on the discharge of CMT3 x Single phase speed controller by auto-transformer - RMB 8.0 Amp3 x WS - Reversing Switch from Helios Fans3 x MWS 1.5 – Transformer Controller With Motor Protection1 x Transformer Speed Control - RTRE- 12.0Amp2 x TG-K Duct temperature sensor1 x Two Speed Switch - REGUL-2
Reviews
Transformer (silent) speed controller - RE 1.5 Amp
Transformer (silent) speed controller - RE 1.5 Amp
£ 132.29

Incredible, Perfect, Silent and Fast delivery ! Thanks "Just...