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Flameproof motor range completed with new frame sizes

07 December 2012

WEG has added three new frame sizes to its W22X line of flameproof motors, the 560, 630 and 710. Innovations adopted in the W22X design include a tube array for optimising through draught cooling. This provides air ducts with both axial and radial flowpaths to maximise cooling of the rotor, stator and critical components such as the bearings.

This arrangement is allied with an aerodynamic fan and fan cover, designed for efficient air flow generation whilst minimising the noise output.

Produced in Maia Portugal, WEG’s Centre of Excellence for the manufacture and design of MV and HV explosion proof induction motors, the W22X is a global range that meets worldwide standards. It is certified to ATEX and IECEx, including Ex d(e) I Mb, Ex d(e) IIB T4 Gb, Ex d(e) IIC T4 Gb and Ex tb IIC T125ºC Db IP6X designations, so is deployable in most hazardous area environments. Other national and regional certifications, such as GOST, CCOE, INMETRO, will be available in the future.

The design of the junction box has been rethought so that it includes internal mounting bolts for protection against impact and environmental damage and prevents the accumulation of water whilst providing generous space for easy connections. There are multiple options available for the junction box while a current transformer, surge arrestor or capacitors can be fitted to the W22X.

The three new frame sizes are all available in 2, 4, 6 and 8 pole versions with medium and high voltage options and a range of maximum outputs from 500kW to 4500kW. The whole W22X range is based on a welded steel construction and includes integral solid feet so that vibration is kept to an absolute minimum, complementing the low noise outputs.

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