• The Indian Electric Co (Indian Electrical Industries)

T.E.F.C. Squirrel Cage A.C. Induction Motors

T.E.F.C. Squirrel Cage A.C. Induction Motors are manufactured to and shall have performance characteristics in accordance with latest editions of Indian Standard specifications -IS325 and equivalent IEC specifications. Spectrum Series motors can be specially designed to have significantly lower derating compared to standard motors when fed through invertors. As a result, Spectrum series motors operate over a wide speed range catering to continuously changing process needs of any process industry. These motors have Cast iron body with longer fins resulting in about 20% increased surface area. Thus Spectrum series motors are more suitable for variable speed applications. Spectrum series motors are provided with non-hygroscopic, composite and compatible insulation scheme of class ‘F’ materials ; however, restricting the temperature rise to class B. As a result, the insulation life is enhanced multi-fold offering higher degree of reliability. The torque developed by motor varies throughout the starting sequence and is classified at three different points on the torque speed curve. All motors are insulated with class ‘F’ insulation system. Class ‘F’ allows temperature rise of 105 K (By the resistance variation method ) over 50oC ambient temperature and maximum temperature of 155o C at the hot spots.