CASE STUDY 1:
Despite HCS having had considerable experience in building variable frequency driven reelers, past projects had been at lower power levels. The umbilical specification in this project brief dictated a drive capacity of 37kW.
Inverter drives, used in Zone 1 hazardous areas, had successfully been installed within certified enclosures for ambient temperatures up to 50°C. These drives however, had a restricted capacity of 11kW due to cooling issues. This limitation presented a challenge to our engineering team.
The proposed solution was to design and certify a cooling system, using commercially available components, which would enable a larger drive to be utilised.
HCS worked in conjunction with SIRA to design and develop a cooling system which fully met the specifications of the brief. The manufactured system was fully certified by appropriate auditing bodies and the design was later patented by HCS.
Project delivered in less than 6 months. The ATEX and IECEx approved reelers fully met the client specification.
Extract from Project Specification
- Zone 1 hazardous area
- Ambient temperature range from -20°C to 50 °C
- Variable speed
- PLC for machine control, datalogging
- Safety relay circuit
- Closed loop tension control capability via sheave load cell