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| FEATURES | VALUES/ STANDARDS | 
|---|---|
| Starting | Resistive start | 
| Permissible starts/hr | Cold successive 4 , Hot successive - 3, Equally spread - 6 | 
| Loading at reduced volts | 75% Rated volts for 5 minutes | 
| Insulation ST / RT | Class `F' / 'F' | 
| Temp. Rise ST / RT | Class `B' / 'F' | 
| Direction of rotation | Bi-directional | 
| No. Of leads, ST/RT | 3 / 3 | 
| Degree of protection | IP 55 | 
| Method of cooling | IC 411 | 
| T.box position | RHS looking from DE | 
| Bearing life (90 % survival basis) | 40,000 working hrs. For direct drive 20,000 working hrs. For belt drive | 
| Vibration | Normal class as per IS 12075 | 
| Noise | As per IS 12065 | 
| Construction | Foot mounted | 
| Frame sizes | SD 180L, SD200L , SD225M , SD250S & M, SD280S & M, SD315, SD315LX & SDX355X | 
| Shaft extension | Single cylindrical extension as per IS 1231 | 
| Body material | Cast iron | 
| T.box material | Cast iron up to 225 Frames, mild steel for 250 to 355 Frames | 
| Fan material | Cast iron up to 225 Frames, mild steel for 250 to 355 Frames | 
| Accessories | Nil | 
| Paint & shade | NC base RAL5012 shade up to 225, Epoxy base RAL5012 above 225 | 
| Bearing type Greasing facility | Open type ball bearings for all frames. Online greasing facility is for all frames |