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New large explosion-proof W22X motors with high efficiency

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15 Jul 2015

WEG, a leading global manufacturer of drive technology, has added a larger IEC 800 frame size model to its energy-efficient W22X series of explosion-proof motors to meet the needs of the most demanding energy-intensive applications while complying with anticipated environmental regulations in Saudi Arabia. The new frame size motors deliver excellent performance with an efficiency of up to 97.4% - up to IE4 energy efficiency standards - and ensure low maintenance and operating costs, making them ideal for applications where harsh environmental conditions demand high reliability and robustness without compromising on energy efficiency.

Energy efficiency has never been so high on the business agenda across the Middle East, especially now that energy efficiency regulations are being decided. For example, in Saudi Arabia, the yet-to-be-ratified SASO (Saudi Arabian Standards Organization) 60034-30-2013 legislation is expected to stipulate that electric motors with rated output power between 0.75 kW and 375 kW must at least meet IE2 energy efficiency standards and, from 2017 onwards, must meet IE3 efficiency levels.

The new W22X 800 explosion-proof motor for medium-voltage and high-voltage applications combines robustness with high efficiency
The new W22X 800 explosion-proof motor for medium-voltage and high-voltage applications combines robustness with high efficiency

“The W22X motor is a testament to our commitment to helping business achieve efficiency while exceeding legal requirements not only in standard applications, but also in hazardous areas, where reducing energy costs is top of the agenda,” says Colin Cox, Managing Director, WEG Middle East. “At WEG we are dedicated to offering the highest possible energy efficient products even in demanding applications, enabling our customers to stay one step ahead of the game and achieve significant energy savings and associated costs.”

One contributing factor to the W22X motor’s high efficiency is its innovative stainless steel tubular cooling system (IEC 60034-6 IC511) which provides optimal air flow and delivers maximum cooling capacity in the stator, rotor, and critical components such as bearings. Additionally, aerodynamically designed fans and fan covers help produce effective air flow with the lowest possible noise level. Hot spots are also avoided by ensuring uniform temperature distribution in the entire frame, therefore providing reliable, high performance over a long service life.

The W22X 800 motors offer ultimate flexibility to the user as they are available with many mounting options including an IM B3 mounting as standard together with various mounting assembly/terminal box arrangements and a flex-resistant welded steel frame with IP55 protection rating and large integrated mounting feet. The robust housing allows the explosion-proof motors to be used in the most demanding applications while minimising vibration and noise emissions.

The W22X 800 motor is available as 2, 4, 6 and 8 pole versions with alternative speeds available on request, and is rated from 2 to 5.6 MW with supply voltage from 6.6 to 11 kV at 50 or 60 Hz. Motors of this size would typically be designed as bespoke solutions, but WEG now offers a standard product with many optional modules in response to increased demand. As such the motor can be customised easily and optimised for individual applications. It is also available to suit different ambient temperatures (-55°C to +60°C), protective devices (surge protectors, capacitors, inverters), terminal boxes (number, position and type), protection ratings (IP56, IP65 or IP66) or variable speed drives.

WEG’s entire W22X product line is available worldwide and compliant with major international standards. For example, the W22X 800 presently has ATEX and IEC Ex certification for Ex d(e) IIB T4 Gb, for mining (Group I) and conductive dusts (Group III), with pending certification for Ex d(e) IIC T4 Gb and regional certifications including GOST, CCOE and INMETRO.

With its broad W22X portfolio in frame sizes from IEC 71 to IEC 800, WEG offers one of the widest ranges of energy-efficient explosion-proof motors currently available on the market. It has the ideal explosion-proof motor solution for virtually every situation from gas pipelines in the Arctic to drilling rigs in the hottest parts of the Arabian Desert.

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