• Model:RTRDU7.0

RTRDU 3 Phase Trickle & Boost 5 Step Speed Controller - 7 Amps

£ 1,110.21 (excl. VAT)

£ 1,332.25 (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 Skyflow SSR Horizontal Roof Cowl SSR80B1 x Ducting 30 Degree Bend - 1120mm1 x HRT/4-500/35-BPN1 x Elta SCP250/4-3AC - IP551 x 220x90mm to 160mm straight adapter1 x Soler & Palau - HCBB/6-500/H - IP651 x CTHB/6-400 High Temp Kitchen Roof Fan1 x Elta Variable Speed Drive IP66 - 7.5KW1 x FRQ-10A V2 Inverter Speed controller1 x FRQ5-4A V2 Inverter Speed Controller1 x Elta Variable Speed Drive IP66 - 2.2KW1 x Helios TSD 3.0 Transformer Speed Control (400v)1 x FU 22 25 Frequency Inverter1 x Elta 10 Amp Electronic single phase speed controller.1 x FU 15 40 Frequency Inverter1 x NKS-D swirl diffuser v-300 x 300mm1 x FU 075 52 Frequency Inverter (IP20)1 x Circular Ceiling Diffuser - TST 1251 x PCA Diffuser - PCA-3151 x Elta Variable Speed Drive IP66 - 0.75KW1 x Frequency converter FU 075 14 - IP661 x Elta Variable Speed Drive IP66 - 4.0KW1 x Circular Ceiling Diffuser - TST 2001 x Elta Variable Speed Drive IP66 - 1.5KW1 x Frequency converter RUCK - FU 075 201 x Elta Variable Speed Drive IP66 - 5.5KW1 x FU 15 16 Frequency Inverter1 x ELTA - Three Phase Transformer 10amps1 x FU 22 04 Frequency Inverter1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Circular Ceiling Diffuser - TST 1001 x ELTA - Three Phase Transformer 3amps1 x Frequency converter RUCK - FU 075 211 x Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x FRQ5-10A Inverter Speed controller1 x Round ceiling diffuser 400mm1 x FU 075 04 Frequency Inverter (IP20)1 x Curved Blade Grille 600x600 (2way blow)1 x Balance S Diffuser - NO RING - 125mm1 x JSR 200 Painted RAL50181 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x Circular Ceiling Diffuser - TST 1601 x Balance S Diffuser - NO RING - 100mm1 x ELTA - Single Phase Transformer 2amps1 x Electronic extractor fan speed controller - FSC 1.51 x Round ceiling diffuser 200mm1 x 5-Speed Controller for use with Elta SAX Classic Fans1 x Round ceiling diffuser 300mm1 x Round ceiling diffuser 350mm1 x EC6H - Reversible Group Fan Electronic Controller1 x EFSC-3N- Single Phase Speed Control1 x Round ceiling diffuser 250mm1 x Elta 6 Amp Electronic single phase speed controller with TK1 x ELTA - Single Phase Transformer 16amps1 x Elta 2 Amp Electronic single phase speed controller.1 x Elta 3 Amp Electronic single phase speed controller with TK1 x Elta 3 Amp Electronic single phase speed controller.1 x ELTA - Single Phase Transformer 8amps1 x Remote Timer Control - 13511 x ELTA - Single Phase Transformer 4amps1 x AIRVENT speed control - AIR4019611 x Airvent ceiling fan controller1 x ELTA - Single Phase Transformer 12amps1 x Elta 6 Amp Electronic single phase speed controller.1 x PCA Diffuser - PCA-2501 x EFSC-6N- Single Phase Speed Control1 x COM-31 x Run On Timer - 5s - 4hrs - RT5A1 x ELTA - Single Phase Transformer 10amps1 x Helios ZNE Electronic Fan Overrun Timer2 x Multi Input Run On Timer - 0 - 20min - CFCU1 x Time Delay Unit - DT20B2 x Push Timer Switch - ZA41 x 7 Day Programmable TIMECLOCK1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Helios TSW 7.5 Amp Transformer speed controller1 x Remote controller FLEX - for VEKO INT1 x RDS 11 Helios Transformer Controller With Motor Protection1 x HCFC 1.7 - Reversible Speed Controller for HCF sweep fans
BD9/9 centrifugal M4 0.35Kw
BD9/9 centrifugal M4 0.35Kw
£ 399.00 now £ 350.00
Reviews
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Really well made but comes with no speed controler? ?and can...