Page 127 - Impiantistica Industriale - Maggio/Giugno 2017

Notiziario

stand the extreme temperature differentials between day and
night in the Oman desert, which can cause potentially dama-
ging condensation.

“We have exceptional experience of developing complete
drive solutions for oil & gas applications – both upstream and
downstream – and our involvement in such a major project
as the PDO SaihRawl Field is a fine example of our commit-
ment to help the oil & gas industry operate more efficiently
and reliably,” comments Colin Cox, Managing Director, WEG
Middle East.

WEG offers one of the broadest ranges of energy-efficient
explosion-proof motors currently available with rated power
from 0.12 kW to 5.6 MW and frame sizes from IEC 71 to
800. For example, the W22Xd IE4 Super Premium motor- the
most energy efficient flameproof motor available on the mar-
ket - combines explosion protection with IE4 efficiency levels
and offers a long service life and low maintenance costs, hel-
ping businesses in the process industry increase productivity,
improve reliability and cut costs by up to 40% compared to
harmonic filter to reduce problems relating to mains borne conventional models.
corruption of the power supply, while an output filter will be
used to protect the drive. WEG’s drives minimise voltage surges by carefully regulating
the time between the pulses of their IGBTs (integrated gate
WEG’svariable speed drive systems have been tested at its bipolar transistors). This decreases the possible surge ma-
manufacturing facility in Brazil in the presence of inspectors gnitude and also allows longer cable runs without detrimen-
from PDO and Larsen & Toubro to simulate the harsh envi- tally affecting motor insulation.
ronmental and operating conditions that may occur in the
field. WEG is also conducting performance tests of the mo- Its patented flux optimising technology reduces input current
tors at the fan manufacturer’s plant in Korea and has orga- by up to 50% of the motor rated speed, which decreases
nised training sessions for PDO staff in the Brazilian factory. motor temperature rise by as much as 11%. Insulation life,
and therefore motor life is extended because it is doubled for
Thanks to its vertical manufacturing process, WEG has also every 10° C decrease in its operating temperature. Alterna-
been able to supply Larsen & Toubro with all of the overloads, tively, output torque can be increased by 50% of the motor
switchgear, relays and push buttons used within the drive rated speed to suit more demanding applications.
cabinets, thus ensuring component compatibility and trouble
free system building and commissioning as well as efficient “Thanks to this high performance drive and motor architec-
ordering and delivery. Other elements in the cabinet inclu- ture, WEG products are the perfect solution for the most ar-
de a control power transformer and auxiliary contactors and duous industrial applications, such as those that are likely to
circuit breakers. Additionally, a door mounted control panel be foundin Oman’s PDO SaihRawl Field Depletion Project,”
incorporates a backlit LCD keypad, while a redundant serial concludes Colin. “WEG can provide the ideal explosion-proof
link (2 channels Modbus-RTU over RS485) provides com- motor for virtually every application, even with extreme ope-
munication to the wider control system. Finally, the control rating conditions such as ambient temperatures from -55°C
cabinets include space heaters, which are essential to with to +80°C and altitudes up to 5,000 m”.

Impiantistica Italiana - Maggio-Giugno 2017 123