Success Story: Water

I. CUSTOMER ENVIRONMENT / PROJECT CONTEXT

Customer profile:

• The town of Grasse has entrusted to Degrémont the construction of a wastewater treatment facility (capacity of 25 000 Equivalent Inhabitants), using a new ultra-filtration membrane technology, called Ultrabox®.
  
• This very compact technology offers a higher treatment capacity for a given plant size.
  
• The Schneider Electric automation solution has been selected for the control system.
  
• This plant is operated by Suez.
  
• Graniou was the system integrator in charge of automation project execution.

Customer objective and constraints:

• Constraints concern discharge level in the Roumiguières valley. Searching for an adapted process, in a protected area, with space limitation.
  
• Installation has to cope with the following constraints:
  - High availability
  - Flexible extension
  - Compact size

II. SOLUTION IMPLEMENTATION

Implementation methodology (main phases):

Solution overview (services, products, systems, architectures...):

• Redundant warm standby programmable controllers, providing high system availability
  
• STB distributed I/Os islands (for the different process functional units), providing complete integration of motor starters (simplified wiring to STB thanks to pre-made cabling) and variable speed drives (via STB canopen extension) on the FIP network. This solution is compact and easy to expand.

III. RESULTS / ACHIEVEMENT

Customer benefits:

• High availability of installation
  
• Flexible extension capabilities
  
• Compact size

Customer testimonies (Verbatim):

• Stéphane Abram, Graniou system integrator project manager: "Thanks to STB islands, we saved on space, with a reduction of 3 or 4 metres of linear enclosure space. But we saved also on wiring: we have an estimating saving time in wiring of approximately 30% ...  We selected Tesys U motor starters for easy connection, compact size, and flexibility for the user: only 3 references cover 80% of the requirements of motor starters on the site".

Schneider Electric differentiating values VS competitors:

• Cost effective solution provided by compactness of equipment and wiring cost reduction, thanks to the associated use of STB distributed I/Os, TesysU motor starters and ATV drives.