Page 128 - Industrial Plants

flameproof motor available on the market - combines
explosion protection with IE4 efficiency levels andoffers
a long service life and low maintenance costs, helping
businesses in the process industry increase productivity,
improve reliability and cut costs by up to 40% compared
to conventional models.

WEG’s drives minimise voltage surges by carefully
regulating the time between the pulses of their IGBTs
(integrated gate bipolar transistors). This decreases the
possible surge magnitude and also allows longer cable
runs without detrimentally affecting motor insulation.

Its patented flux optimising technologyreduces input
current by up to 50% of the motor rated speed, which
decreases motor temperature rise by as much as 11%.
Insulation life, and therefore motor life is
extendedbecause it is doubled for every 10° C
the harsh environmental and operating conditions that decrease in its operating temperature. Alternatively,
may occur in the field. WEG is also conducting output torque can be increased by 50% of the motor
performance tests of the motors at the fan rated speed to suit more demanding applications.
manufacturer’s plant in Korea and has organised
training sessions for PDO staff in the Brazilian factory. “Thanks to this high performance drive and motor
architecture, WEG products are the perfect solution for
Thanks to its vertical manufacturing process, WEG has the most arduous industrial applications, such as those
also been able to supply Larsen & Toubro with all of the that are likely to be foundin Oman’s PDO SaihRawl
overloads, switchgear, relays and pushbuttons used Field Depletion Project,” concludes Colin. “WEG can
within the drive cabinets,thus ensuring component provide the ideal explosion-proof motor for virtually
compatibility and trouble free system building and every application, even with extreme operating
commissioning as well as efficient ordering and delivery. conditions such as ambient temperatures from -55°C
Other elements in the cabinet include a control power to +80°C and altitudes up to 5,000 m”.
transformer and auxiliary contactors and circuit
breakers. Additionally, a door mounted control panel
incorporates a backlit LCD keypad, while a redundant
serial link (2 channels Modbus-RTU over RS485)
provides communication to the wider control system.
Finally, the control cabinets include space heaters,
which are essential to withstand the extreme
temperature differentials between day and night in the
Oman desert, which can cause potentially damaging
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 commitment 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

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