1.1 Frame
Aluminum Frames are made of high quality die cast aluminum, providing a light weight and robust enclosure. Available as standard from 80 to 200 frame size. Frame sizes above 112 are all equipped with eyebolts in order to allow easy handling.
The cast iron frame is made of FC-200 cast iron, which is sturdy and durable. Frame sizes from W225S to 280M are designed with one-piece feet.
1.2 End shields
W20 motors DE and NDE shields are made of cast iron. This new design ensures robustness for long term operation for a wide range of ambients and temperature.
1.3 Fan cover
W20's fan cover is made of steel plate.
1.4 Terminal Box
As the fan cover, W20 motor terminal box is also made of steel. In order to facilitate wiring, there is enough space in the terminal box, which can be rotated 90 degrees, and the installation is very flexible. The hole of the terminal box is the Chinese standard threaded hole, with plastic cover.
Note: users can select or replace the wiring gland to meet the IP55 protection level.
1.5 Terminal Block
The connection wires are in accordance with standard IEC 60034-8 and GB1971-2006, and are matched with appointed terminal block. W20 motors are equipped with BMC terminal block. The picture is as below.
1.6 Bearings
WEG motors are equipped with ball bearings and have regreasing nippes for frame 225 and above. WEG cooperate with international recognized bearing suppliers to ensure the motor's high performance and extended bearing life time. If a specific bearing brand was required, please contact WEG support team before placing order.
Note 1: Motor with shaft down mounting position shall considered drip cover.
Note 2: For shaft up outdoor applications, the use of slinger can provide extra protection to the bearing.
1.6.1 Bearings thrusts
1.7 Nameplate
Nameplates are made of AISI 304 stainless steel. All the information are printed onto the nameplates by laser. Nameplate included main informations of motor, such as: serial number, output, voltage, current, frequency, protection degree, power factor, insulation class, bearings type, grease and regreasing interval, etc. IEC frame up to 200 has vertical nameplate (figure 7) and frame 225 to 355 has horizontal nameplate (figure 8).
1.8 Axial Flow Blower (Optional)
In frequency conversion applications, axial flow fans (inner rotor motor 380V 50Hz) can be selected according to customer requirements for forced cooling (90 to 355 frames). The position of the terminal box of the axial flow fan is at the top by default (view from the shaft end). If you have special requirements for the position of the terminal box of the axial flow fan, please contact related WEG support team for more details.
1.9 Packing
W20 motors frame 80 to 132 have carton box as standard packaging (figure 13). Frame 160 to 355, the packaging of motor are carton box or wooden box WEG choose different packaging according to the mounting and frame size of motors). The WEG packaging is under continuous improvement, it is subject to change without previous notifications.
2.0 W20 series motor structure
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