Explosion-proof motors to drive pumping heart of Brazilian refinery 04 February 2013

The Petrobras Abreu e Lima refinery, in Ipojuca, Brazil – the first built with Brazilian technology throughout – will be turning up production, using WEG motors also manufactured in Brazil.

The 11 three-phase induction motors, suitable for operation in explosive atmospheres, will be used to drive the centrifugal pumps feeding water into the cooling towers.

Both pumps and motors will be located in the refining area and will feed the cooling towers associated with the site's main steam turbines.

WEG engineer Marcelo Vedana explains that the pumps will operate to provide water for circulation and cooling the plant and equipment.

"These KSB pumps and associated equipment require special motors that offer a high degree of reliability," states Vedana.

"To enhance their reliability, the motors are designed to be robust and use the best quality bearings and ancillary components. The windings are precision made and balanced, whilst advanced thermal management ensures cool running," he adds.

Vedana makes the point that, not only must explosion proof motors be designed to reduce the likelihood of exploding, but they must also be capable of containing an internal explosion so that it does not propagate to the surrounding areas.

They must also resist corrosion and have flame-proof joints and flanges with minimum tolerances so that hot gases from an internal explosion cool down before exiting to the wider environment.

Brian Tinham

Related Companies
WEG Electrical Motors (UK) Ltd

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