Page 50 - Industrial plants

of acid washing can be determined only on the basis of stainless steel (AISI 316) and after painted as per
field experience customer specifications with a detailed procedure.
So, this project concerns the automation of a package All incoming power supplies (mains, auxiliary and UPS)
consisting of electrochlorination process designed and are fully redundant and a redundant communication
managed by SCAE. with the DCS, managed via optical fiber (with two
media converters to provide wired redundancy), has
been created to allow the complete supervision of the
The project: Hardware whole package.
and software design Consequently, following the specifications of the
Customer and supporting them in the technical choice
The package consists of two electrolyzers, one of hardware, SCAE has provided the CPUs in redundant
transformer rectifiers, one tank, several valves, and mode.
electrical motors/components. Each item must be The solution is a system that provides greater
used separately in manual or together in an automatic availability. The system has greater availability because
cycle (Master/ Stand-by mode) in order to guarantee it uses a redundant chassis pair which maintains
the best product based on field experience and these process operation when some events, such as a fault
modes can be managed from the operator with an on a controller, occur and could stop process
easy and clear selection from the Unit Control Panel. operations on non-redundant systems. The redundant
The electrical cabinet that controls the package is chassis pair includes two synchronized chassis with
completely designed and manufactured by SCAE to identically specific components in each of them.
meet the end user’s requirements, from the enclosure So SCAE, by this system, can guarantee continued
material, to each required certification, to the high reliable operation of the customer’s plant and
degree of automation of critical points in the end user’s application.
facility. All the system has been tested during the FAT with the
customer and will be tested during iFAT with DCS.
“The control and the precision of In addition, SCAE has developed software and HMI
each part of the process were the pages for easy management of the package, including
critical point and they have been the dynamic utilities for all the electrical components, as
starting points of the project well as preventive diagnostics to allow operators to
perform optimal maintenance on machine components.
SCAE’s electrical design team supported the customer Thanks to the expertise of SCAE software developers
in selecting the various components at each stage and and SCAE electrical designers, all electrical components
provided all documentation in accordance with the are constantly monitored and shown on the HMI.
customer’s template. Then, SCAE has prepared a communication via optical
That said, the cabinet has been designed and built in fiber protected with layer-3 switches to establish a
tunnel for the remote control of the process in
accordance with cyber-security norms requested by
customer.

SIL and IECEX certifications

The icing on the cake of this project was the certification
requested for SIL and the certification for IECEX zone
of electrical cabinet provided by SCAE.

“SCAE has developed the SIL
ASSIGNMENT ANALYSIS - Analysis
performed by SCAE FS Engineer
(TÜV Rheinland certified. ID-No #
18312/19) - with all the calculations
of the level reached and manual
for safety dedicated only to the
functional safety loops

The analysis has demanded the selection of all the
materials with attention for each detail in order to be in

IndustrIal Plants - May 2023
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