Standard Squirrel Cage TEFC Motors
Type MA -0.12kW-315kW,
Frame 63-355M
Conformance to Standards :
All motors comply with the following Indian and international standards:
| IS 325 | Three phase Induction motors-specification |
| IS:900 | Code of practice for installation and maintenance of induction motors |
| IS 1231 | Dimension of three-phase foot mounted A.C. Induction motors |
| IS 2223 | Dimensions of flange mounted A.C. induction motors |
| IS:4029 | Guide for testing three phase induction motors |
| IS:4691 | Degree of protection provided by Enclosures for Rotating Electrical Machinery |
| IS:6362 | Designation of methods of cooling for rotating electrical machines |
| IS 12065 | Permissible limits of noise level for rotating electrical machines |
| IS 12075 | Mechanical vibration of rotating electrical machines |
| IEC 60045-1, 5 | Rotating electrical machines - Rating and performance, degrees of protection |
| IEC 60072 | Dimension and output ratings of rotating electrical machines |
Salient features of TEFC Standard Motors:
❖ BBL motors can be continuously overloaded by 10% or can be used up to ambient temperature of 55°C. Temperature rise will be as per Class F limits.
❖ All motors are with degree of protection IP55
❖ All motors up to 280M frame are designed for 50°C ambient
❖ 2Z Bearings are standard up to 180L frame which are filled with high temperature grease suitable up to 140°C
❖ On line re greasing provided from frame 225 onwards
❖ SKF or equivalent make bearings are used and directly procured from the bearing manufacturers
❖ Terminal boxes are large and can be rotated in steps of 90
❖ Terminal Box location can be changed from RHS to LHS at site
❖ Rotors are dynamically balanced with half key
❖ All foot mounted motors are with integral cast feet
❖ Outer bearing covers are integral with end shield / flange
❖ V Rings are used in IP55 motors and no reduction in efficiencies as compared to IP44 motors
❖ Additional anti tracking protective coating of air drying varnish is applied on the winding overhangs
❖ Cooling fans are of aerodynamic design resulting in low noise and are bi-directional
❖ Standard Motors are suitable for mounting with any shaft orientation
