W22
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Motors | Automation | Energy | Transmission & Distribution | Coatings W22 Three-Phase Electric Motor

W22 Line - High Efficiency Motors The increasing demand for electrical energy to sustain global development requires consistent heavy investments in power supply generation. However, in addition to complex medium and long term planning, these investments rely on natural resources, which are becoming depleted due to constant pressures upon the environment. The best strategy, therefore, to maintain energy supply in the short term is to avoid wastage and increase energy efficiency. Electric motors play a major role in this strategy, since around 40% of global energy demand is estimated to be...

Sustainability and Carbon Emission Reduction Through Super Premium Efficiency Motors The Super Premium Efficiency (IE4) level established in IEC 60034-30-1: 2014 is considered the highest efficiency class which a squirrel cage induction motor can achieve whilst remaining economically viable. It is also the optimum solution to increase the efficiency of an existing application through direct replacement. So, why have Super Premium Efficiency motors not become the Industry standard? It may be argued that super premium efficiency motors are also super premium in price when comparing against...

Minimum Energy Performance Standards - Europe Scope Increasingly, the World seeks a path of sustainability and new ways to reduce energy consumption. A significant percentage of the electrical energy utilized in facilities around the World is consumed by electric motors. Consequently, Governments around the World are implementing Energy Efficiency Programs in order to enforce the use of high efficiency motors. Up until 2009, Europe did not have any specific regulations relating to the energy efficiency levels of electric motors. There existed only a voluntary agreement...

Table 1 - Minimum efficiency levels (according to IEC 60034-30-1 : 2014). WEG can support the movement towards these high efficiency levels by offering a comprehensive range of products meeting the IE1, IE2, IE3 and even IE4 criteria detailed above. Additionally our variable speed drives are perfectly matched to our motors, affording you the most reliable package of motor / drive products in industry. To learn more about WEG, our products and the new Global Directives, go to www.weg.net or www.weg.net/green

Table 2 - Visual Index

1. Versions Available Meeting the legislative requirements of the European Market, W22 motors are available in three versions in accordance with IEC 60034-30-1 : 2014: High Efficiency (IE2), Premium Efficiency (IE3) and Super Premium Efficiency (IE4). Figure 1 shows the efficiency levels established by IEC 60034-30-1 : 2014 for induction motors. 2 Poles 90 80 70 High efficiency motors (IE2) Premium efficiency motors (IE3) Super Premium efficiency motors (IE4) Figure 1 - Efficiency levels according to IEC 60034-30-1 : 2014

Efficiency values for W22 motors are prepared in accordance with the test standard IEC 60034-2-1:2014, with stray load losses determined directly by the summation of losses. The output versus frame ratio for all W22 motors follows the EN 50347 standard, thus allowing direct replacement of existing lower efficiency motors with high (IE2), premium (IE3) or super premium (IE4) machines. A further characteristic of the W22 electrical design is that it was conceived in such way that its efficiency remains practically constant in the 75% to 100% load range. Therefore, even when the motor is not...

Eyebolts are provided as standard from frame size 100L. The positions of the eyebolts are shown in the table 3: All frames from 63 to 355A/B are provided with an earth terminal located inside the terminal box (see figure 7). Motors in frames 225S/M to 355A/B are also fitted with an earth terminal on the frame. It is located on the same side of the main terminal box cable entry (see figure 7) and is responsible to equalize electrical potential and provide greater safety for operators. Capable of terminating cables from 25 mm2 to 185 mm2. Optionally, an external earth terminal can be provided...

cooling fins, thus reducing motor operating temperatures. Terminal box position on either the left or right hand side of the motor is possible through the use of an adaptor (see figure 9). Adapting device Figure 11 - BMC terminal block Motors in frame size 355A/B are provided with a staggered terminal block arrangement, as indicated in figure 12. Figure 9 - Terminal box mounted on the left side viewing from drive end shaft When supplied from the factory with a side mounted terminal box arrangement, this can be positioned on the opposite side simply by rotating the adaptor. Similarly, by...

3.8 Endshields The drive end endshield (figure 15) is designed with fins for improved thermal heat dissipation, to ensure lower bearing operating temperatures, resulting in extended lubrication intervals. For the frames 225S/M to 355A/B, where ventilation is critical for thermal performance of the motor, the endshield fastening screws are located in such a way so as not to obstruct the airflow across any cooling fin, thus contributing to better thermal exchange. The nameplate details information relating to the construction and performance characteristics of the motor. It is also necessary...

1 - Motor code 2 - Number of phases 3 - Rated operating voltage 4 - Service duty 5 - Efficiency Code - IE 6 - Frame size 7 - Degree of protection 8 - Insulation class 9 - Temperature rise 10 - Frequency 11 - Motor rated power 12 - Full load speed (rpm) 13 - Rated operating current 14 - Power factor 15 - Ambient temperature 16 - Service factor 17 - Altitude 18 - Motor weight 19 - Drive end bearing type and amount of grease (where applicable) 20 - Non-drive end bearing type and amount of grease (where applicable) 21 - Type of grease for bearings 22 - Connection diagram 23 - Relubrication...

Table 6 - Maximum expected increase of sound pressure level for loaded motors. Table 7 -Speed and vibration levels The noise level values shown in tables 4 and 5 are taken at 1 metre at no load. Under load the IEC 60034-9 Standard foresees an increase of the sound pressure levels as shown in table 6. Note: These values refer to operating frequencies of 50 Hz and 60 Hz. The overall noise level can be reduced by up to 2 dB (A) with the installation of a drip cover. 4.2 Vibration Level Vibration of an electrical machine is closely related to its assembly on the application and, thus, it is...