The rotor core mounts on a steel shaft to form a rotor assembly. The wound rotor is another type of induction-motor-rotor construction. A major difference between the wound rotor motor and the squirrel-cage rotor is that the conductors of the wound rotor consist of wound coils instead of bars.
The 511 area code is NOT a valid area code. This area code is NOT officially assigned to a known Numbering Plan Area (NPA).
The 548 area code was the second area code overlay for the 519 region. The new code will be activated on June 4, 2015. Canadian Numbering Administrator (CNA) advised the CRTC on October 12, 2011 that based on the current rate of expansion the current numbering system would be exhausted by January 2017.t was overlaid with the new area code 226 on October 21, 2006, at which time ten-digit dialling became mandatory. Area code 226 is Canada's 25th geographical area code (not including area code 600). Area code 548 was added as a third overlay beginning on June 4, 2016.