• 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 Elta Variable Speed Drive IP66 - 2.2KW (1ph to 3ph)1 x Helios - FIUK-11KW 24.0A - FREQUENCY INVERTER1 x FU 075 04 Frequency Inverter (IP20)1 x ELTA - Three Phase Transformer 3amps1 x ELTA - Three Phase Transformer 10amps1 x ATEX rated 3-phase Speed Control - R-DK4 KT (EX)1 x Frequency converter RUCK - FU 075 211 x FU 22 04 Frequency Inverter1 x Elta 10 Amp Electronic single phase speed controller.2 x Remote controller FLEX - for VEKO INT1 x ELTA - Single Phase Transformer 2amps1 x Electronic extractor fan speed controller - FSC 1.52 x Helios TSW 3 Amp Transformer speed controller1 x Vent Axia ACM 125 T (Timer Model) inline mixed flow duct fan1 x Elta Variable Speed Drive IP66 - 1.5KW (1ph to 3ph)1 x ELTA - Single Phase Transformer 8amps1 x Vent Axia ACM 100 T (Timer Model) inline mixed flow duct fan1 x Elta 3 Amp Electronic single phase speed controller.1 x Elta 6 Amp Electronic single phase speed controller with TK1 x EFSC-3N- Single Phase Speed Control1 x COM-31 x Circular Ceiling Diffuser - TST 1251 x Single phase speed controller by auto-transformer - RMB 1.5 Amp1 x ELTA - Single Phase Transformer 4amps1 x EFSC-6N- Single Phase Speed Control1 x Curved Blade Grille 600x600 (2way blow)1 x Circular Ceiling Diffuser - TST 1001 x Elta 3 Amp Electronic single phase speed controller with TK1 x Balance S Diffuser - NO RING - 125mm1 x Transformer 5 Speed Controller - ATC1-8TK1 x PCA Diffuser - PCA-3151 x Airvent ceiling fan controller1 x Transformer 5 Speed Controller - ATC1-10TK
Reviews
TD-SILENT 350/125
TD-SILENT 350/125
£ 178.68

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