Skip to content

Search for:
- - × 139977 - EM DUO 355 EC 01 - Efficient diagonal fan - Ruck 1 × £2,769.52
  - × MBD 355/2/2 - Helios - MegaBox Centrifugal Fan 1 × £2,554.80
  - × Pressed Saddle - 200mm Diameter 1 × £5.62
  - × RSD 355/800 - Helios - Flanged Circular Attenuator 1 × £394.90
  - × Pressed Saddle - 200mm Diameter 1 × £5.62
  - × MCA-250/100MM - Non-Return Shutter - Soler & Palau 1 × £64.05
  - × ESA 1 Amp - Electronic Speed Controller - Helios 1 × £74.59
  - × 159802 - MPC 355 EC 40 - Box fan MPC with EC motor - Ruck 1 × £873.60
  - × FR 200 - Helios - Flange 1 × £41.68
  - × FM 250 - Helios - Flexible Sleeve 1 × £38.40
  - × MK 315/355 - Helios - Mounting Feet (2 PCS.) 1 × £50.46
  - × DEF-1000 D - Wire Protection Guards Outlet - Soler & Palau 1 × £393.75
  - × 018-355-CLAMP - 355mm - Fast Clamps - Elta 1 × £43.75
  - × Pressed Saddle - 200mm Diameter 1 × £5.62
  - × Pressed Saddle - 200mm Diameter 1 × £5.62
  - × STS 355 EX - Helios - Flanged Flexible Connector 3 × £110.80
  - × HSW 315/6 - Helios - Cased Axial In Wall Fan - Low Pressure 1 × £516.67
  - × RR 315C - Centrifugal Inline Fan - Helios 1 × £220.49
  - × MRV 355 - Helios - Mounting Feet For Vertical Attachment 2 × £244.63
  - × VK 355 - Helios - Gravity Shutter 1 × £47.00
  - × GBW EC 355 - Helios - GigaBox EC Centrifugal Fan 1 × £1,181.42
  - × 063-0560-MAN150 - Standard Ambient Flexible Connector - Elta 1 × £41.00
  - × REB1 - Fan Speed Controller - Soler & Palau 1 × £92.40
  - × RVS 315 - Helios - Back Draught Shutter 1 × £119.57
  - × HQW EC 400 B - Helios - EC Axial Plate Fan 1 × £1,917.47
  - × Circular Fire Dampers (with Universal Plate Frame) - 160mm Diameter 1 × £79.13
  - × Bird Beak - 200mm Diameter 1 × £18.00
  - × RSD 355/1200 - Helios - Flanged Circular Attenuator 1 × £392.71
  - × STS 355 - Helios - Flanged Flexible Connector 1 × £103.11
  - × Quietflow Twin SQTDCV200-1ECL - Elta - Centrifugal Box Fan 1 × £1,943.61
  - × WHR 125 - Helios - Water Heater Battery For Circular Ducting 1 × £270.95
  - × 068-0125-JF4 - 125dia - 1200mm Long - Spigot Silencer - Elta 1 × £89.00
  - × Louvre Shutter 064-0400-C 1 × £61.80
  - × DSEL 3 - Three speed switch - Helios 1 × £60.00
  - × TD-250/100 SILENT T - INLINE FAN - SOLER & PALAU 1 × £185.85
  - × 149-DCV-HRT Humidity Transmitter - Elta 1 × £310.03
  - × Multi-Blade Volume Control Damper - 450mm Diameter 1 × £79.00
  - × 149-POT-10-MI - EC Electronic Controller - Elta 1 × £68.00
  - × Espada ILC/5P (250) - TF250024 - Plastic Tube Fan 1ph - Flakt Woods 1 × £161.00
  - × HCBT/4-900/H-AX (5.5KW) - Plate Axial Flow Extract Fan *400v 50* - Soler & Palau 1 × £1,363.79
  - × RVB 160 - Helios - Duct Connector 1 × £28.52
  - × Insulated Flexible Duct - 450mm Diameter 1 × £98.00
  - × 062-SEL03 Box Fan AV Mounts - Elta 1 × £43.75
  - × 078C-0250-C - 250mm - Impeller Side Guard - Elta 1 × £53.00
  - × SSD 315 - Helios - Base Attenuator, Hingeable - (with Hinge Mechanism) 1 × £804.07
  - × HQW EC 400 A - Helios - EC Axial Plate Fan 1 × £1,354.74
  - × 018-100-CLAMP - 100mm - Fast Clamps - Elta 1 × £43.75
  - × 068-0150-JF1 - 150dia - 300mm - Spigot Silencer - Elta 1 × £54.00
  - × EHR-R 1,2/200 - Electric heater - Helios 1 × £209.09
  - × Reducer - 160mm Diameter 1 × £5.80
  Subtotal: £20,160.36
  
  View basket Checkout

Basket
- × 139977 - EM DUO 355 EC 01 - Efficient diagonal fan - Ruck 1 × £2,769.52
- × MBD 355/2/2 - Helios - MegaBox Centrifugal Fan 1 × £2,554.80
- × Pressed Saddle - 200mm Diameter 1 × £5.62
- × RSD 355/800 - Helios - Flanged Circular Attenuator 1 × £394.90
- × Pressed Saddle - 200mm Diameter 1 × £5.62
- × MCA-250/100MM - Non-Return Shutter - Soler & Palau 1 × £64.05
- × ESA 1 Amp - Electronic Speed Controller - Helios 1 × £74.59
- × 159802 - MPC 355 EC 40 - Box fan MPC with EC motor - Ruck 1 × £873.60
- × FR 200 - Helios - Flange 1 × £41.68
- × FM 250 - Helios - Flexible Sleeve 1 × £38.40
- × MK 315/355 - Helios - Mounting Feet (2 PCS.) 1 × £50.46
- × DEF-1000 D - Wire Protection Guards Outlet - Soler & Palau 1 × £393.75
- × 018-355-CLAMP - 355mm - Fast Clamps - Elta 1 × £43.75
- × Pressed Saddle - 200mm Diameter 1 × £5.62
- × Pressed Saddle - 200mm Diameter 1 × £5.62
- × STS 355 EX - Helios - Flanged Flexible Connector 3 × £110.80
- × HSW 315/6 - Helios - Cased Axial In Wall Fan - Low Pressure 1 × £516.67
- × RR 315C - Centrifugal Inline Fan - Helios 1 × £220.49
- × MRV 355 - Helios - Mounting Feet For Vertical Attachment 2 × £244.63
- × VK 355 - Helios - Gravity Shutter 1 × £47.00
- × GBW EC 355 - Helios - GigaBox EC Centrifugal Fan 1 × £1,181.42
- × 063-0560-MAN150 - Standard Ambient Flexible Connector - Elta 1 × £41.00
- × REB1 - Fan Speed Controller - Soler & Palau 1 × £92.40
- × RVS 315 - Helios - Back Draught Shutter 1 × £119.57
- × HQW EC 400 B - Helios - EC Axial Plate Fan 1 × £1,917.47
- × Circular Fire Dampers (with Universal Plate Frame) - 160mm Diameter 1 × £79.13
- × Bird Beak - 200mm Diameter 1 × £18.00
- × RSD 355/1200 - Helios - Flanged Circular Attenuator 1 × £392.71
- × STS 355 - Helios - Flanged Flexible Connector 1 × £103.11
- × Quietflow Twin SQTDCV200-1ECL - Elta - Centrifugal Box Fan 1 × £1,943.61
- × WHR 125 - Helios - Water Heater Battery For Circular Ducting 1 × £270.95
- × 068-0125-JF4 - 125dia - 1200mm Long - Spigot Silencer - Elta 1 × £89.00
- × Louvre Shutter 064-0400-C 1 × £61.80
- × DSEL 3 - Three speed switch - Helios 1 × £60.00
- × TD-250/100 SILENT T - INLINE FAN - SOLER & PALAU 1 × £185.85
- × 149-DCV-HRT Humidity Transmitter - Elta 1 × £310.03
- × Multi-Blade Volume Control Damper - 450mm Diameter 1 × £79.00
- × 149-POT-10-MI - EC Electronic Controller - Elta 1 × £68.00
- × Espada ILC/5P (250) - TF250024 - Plastic Tube Fan 1ph - Flakt Woods 1 × £161.00
- × HCBT/4-900/H-AX (5.5KW) - Plate Axial Flow Extract Fan *400v 50* - Soler & Palau 1 × £1,363.79
- × RVB 160 - Helios - Duct Connector 1 × £28.52
- × Insulated Flexible Duct - 450mm Diameter 1 × £98.00
- × 062-SEL03 Box Fan AV Mounts - Elta 1 × £43.75
- × 078C-0250-C - 250mm - Impeller Side Guard - Elta 1 × £53.00
- × SSD 315 - Helios - Base Attenuator, Hingeable - (with Hinge Mechanism) 1 × £804.07
- × HQW EC 400 A - Helios - EC Axial Plate Fan 1 × £1,354.74
- × 018-100-CLAMP - 100mm - Fast Clamps - Elta 1 × £43.75
- × 068-0150-JF1 - 150dia - 300mm - Spigot Silencer - Elta 1 × £54.00
- × EHR-R 1,2/200 - Electric heater - Helios 1 × £209.09
- × Reducer - 160mm Diameter 1 × £5.80
Subtotal: £20,160.36

View basket Checkout

Home
Domestic Fans
Commercial Fans
Controllers & Accessories
Controllers & Accessories Cont.
Clearance Fans & Fan Accessories
Contact Us
Support
- Useful Info
- Credit Account Application

Home / Controllers & Accessories / Controllers

TSD 5.5 – Helios – Transformer Controller

£492.54 ex. VAT

TSD 5.5 - Helios - Transformer Controller quantity

Category: Controllers Tag: Three Phase

Description
Brand

TSD 5.5 – Helios – Transformer Controller

For speed controlling of one or more 3-phase fans by reducing the voltage. Switchable voltage 0/80/140/280/400 volt. Housing IP 54. 50/60 Hz.

Product PDF:

TSD CONTROLLER CATALOGUE

Brand

Helios

Ventilation Experts is the online shop powered by L&B Ventilation Supplies Ltd. We are an independent distributor and stockist to the Heating, Ventilation & Air conditioning (HVAC) industry.

Popular Products

Bathroom / Kitchen Extractor Fans
Utility Room Fans
Window & Wall fans
Plate Axial Fans
Cased Axial Fans
Bifurcated Axial Flow Fans
Box Fans

Customer Services

Contact Us
Delivery
Returns Policy
About us
Terms & Conditions
Cookie Policy

Come and see us

Norwich Branch:

4 Albertine Close,

Sweet Briar Industrial Estate,

Norwich NR3 2FA

Chelmsford Branch:

Unit 3 Grafton Place,

Dukes Park Ind Est,

Chelmsford, CM2 6TG

Monday to Friday 6:00am – 5:00pm

Follow us

© Ventilation Experts 2025. Ventilation Experts is a trading name of L&B Ventilation Supplies Ltd. Online prices are for a limited time only, and subject to change see our full Terms & Conditions. Registered in England and Wales No. 10679544. Unit 4 Albertine Close, Sweet Briar Industrial Estate, Norwich, Norfolk, NR3 2FA. Website by JMJ Digital

Search for:
Home
Domestic Fans
Commercial Fans
Controllers & Accessories
Controllers & Accessories Cont.
Clearance Fans & Fan Accessories
Contact Us
Support
- Useful Info
- Credit Account Application
Login

Login

Username or email address *

Password *

Remember me

Lost your password?

Register

Email address *

Password *