About WEG

WEG is a major global player in the power distribution, automation and control sector. WEG employs 28,000 people worldwide. The company’s global sales now exceed  US $3-billion, representing increasing global success across a wide range of product groups. These include the latest generation of transformers, LV control gear, generators,  gear motors, inverter drive systems, soft starters, LV/MV and HV motors, ATEX- compliant explosion proof motors, smoke extraction motors and full turnkey systems

WEG W22Xd flameproof motor is now fully Ex certified for the Global market

Flameproof motor meets hazardous area certifications for oil, gas and mining.

 WEG Hazardous area motor W22Xd

Produced at WEG’s Centre of Excellence for the manufacture and design of medium and high voltage hazardous area induction motors at Maia in Portugal, the WEG W22Xd flameproof motor meets worldwide standards and is certified to meet European ATEX and International IECEx requirements. The WEG W22XdB/W22XdC and W22XdM flameproof motors are specially designed to meet the certification requirements for equipment installed in Oil & Gas and Mining hazardous areas respectively. Complying with the ATEX Directive 94/9/EC, it is classified as Group I (mines susceptible to firedamp) and Group II (surface industries), for gases Group IIB and IIC, suitable for use in hazardous area defined as Zone 1 - Gases and Vapours (G), and Zone 21 – Gases, Vapours and Dust (GD).


Andrew Glover, Low Voltage Motors Product Manager for the European Market at WEG, says: “WEG Euro in Portugal started development in 2002 of its line of flameproof motors covering the larger power output segment for low, medium and high voltage supplies up to 11kV.”


“Having already introduced motors in frame sizes 315 to 500, the line has now been extended to include larger sizes through to a 710 frame. Complying with the latest editions of IEC/EN 60079 standards, the new W22Xd line affords WEG the capability to provide a comprehensive range of hazardous area motor products from IEC frame sizes 71 to 710.”


The European and International certifications the W22Xd has been awarded include Ex d(e) I Mb, Ex d(e) IIB T4 Gb, Ex d(e) IIC T4 Gb and Ex tb IIIC T125°C Db IP6X designations. Other National and Regional certifications, such as TRCU / GOST (Russia), CCOE (India), INMETRO (Brazil) and CSA (North America) are also available.


Innovations in the W22Xd 560-710 frame design include a stainless steel tube array which provides air ducts affording both axial and radial flow paths which optimise cooling of the rotor, stator and critical components such as the bearings. It is fitted with an aerodynamic fan and cover for efficient air flow with minimum noise.


Designed with finite element analysis (FEA) software, this new cooling system provides outstanding heat dissipation which reduces thermal stress on the insulating materials which age. It also eliminates hot spots by providing a uniform temperature distribution throughout the frame.


The main terminal box of the W22Xd box has been carefully redesigned, and incorporates fixing bolt housings affording protection from impacts and environmental damage, and prevention against accumulation of water whilst providing generous space for easy connections. There are multiple options available for the main power terminal box, and accessory terminal boxes for connecting motor protections such as current transformers, surge arrestors or surge capacitors can also be provided across the W22Xd range.


Available with two, four, six or eight poles (higher polarities available on request) in medium and high voltage versions and a range of outputs from 500kW to 4500kW, the W22Xd 560-710 frame range is based on a welded steel construction and features integral solid feet to minimise vibrations, complementing the low noise outputs.


With the W22Xd range, WEG has the capability to provide flameproof motor solutions for application in virtually all extreme conditions such as ambient temperatures from -55 degrees to +60 degrees centigrade and altitudes up to 5,000 metres above sea level.




WEG helps equip Brazilian bus with 100% battery drive

Driven by an 18-metre long battery, which is believed to be the first of its kind in the world, the vehicle can operate all day long without emitting any pollutant.


The Brazilian city of São Bernardo do Campo in São Paulo State has seen the launch of its first bus to be powered totally by electric battery. Driven by an 18-metre long battery, which is believed to be the first of its kind in the world, the vehicle can operate all day long without emitting any pollutant. The bus, designed by Eletra, is equipped with a WEG water-cooled traction motor and a water-cooled traction inverter as well as other equipment.

Named the ‘E-Bus', the vehicle can run for 200km, powered by the charge delivered from the lithium batteries. Plus, in addition to being environmentally friendly, the vehicle does not need to be connected to a power line to run (unlike the traditional trolley bus) and this system provides more flexibility and reduces the high maintenance costs associated with the power line type vehicles.

Demonstrating efficient operation and a high cruise range the E-Bus also relies on regenerative braking delivered via the WEG inverter. A regenerative brake is an energy recovery mechanism which slows a vehicle down by converting its kinetic energy into another form, which can be either used immediately or stored until needed. This contrasts with conventional braking systems, where the excess kinetic energy is converted to heat by friction in the brake linings and therefore wasted. Using WEG inverter technology the energy that would otherwise be lost is stored in the vehicle’s batteries to make it even more efficient.

Contributing to the flexibility and high availability of the vehicle is the fact that the 14 batteries, which are located on the roof of the bus, take just three hour to be fully recharged; however, the vehicle also features a ‘fast charge’ system which provides an extra 11-km running distance in only five minutes. At the end of each journey, the bus receives the fast charge at the terminal, while the passengers get on board. When the bus is not needed to depart immediately the batteries can be fully re-charged.

The water-cooled traction motor was developed to meet the project requirements, with a specially designed and lightweight fixing system. The water-cooled, CFW11T traction inverter is specifically for vehicles such as buses, light rail vehicles, trains and trucks. However, it’s not just the motor and the inverter that are supplied by WEG, as the company is also able to supply the compressor motors, hydraulic pump, inverters for the air conditioning system and auxiliary motors.

The expectation of the São Paulo Government is to replace its diesel fleet and the trolley buses with the electric battery bus within a year. Currently the E-bus is being tested but it is expected to be in full operational use by the beginning of 2014