Page 45 - Industrial Power Engineering and Applications Handbook

1/26 Industrial Power Engineering and Applications Handbook

Figure 1.20(a) Totally enclosed tube ventilated (TETV) squirrel cage motor (Cooling system IC5A111) (Courtesy: BHEL)

Figure 1.20(b) A typical cooling circuit type IC5AIAI

1 Lifting lug 12 Handle for emptying 1 2345678 9
Air baffle grease collecting box
Coil bracing ring 13 Welded frame 1
Cooling tubes 14 Terminal box with
Short-circuiting ring cable sealing box
Stator core packet 15 Rotor core packet 10
Two-layer fully formed 16 Section bars of the
coils of stator winding squirrel cage
8 Air guide shell 17 Rotor end plate
9 Bearing endshield 18 Grease collecting box 11
10 Fan for outer air 19 Grease thrower of
circuit labyrinth seal 12
11 Fan hood with 20 Opening for checking
protective grid for air gap 13
cooling air intake 21 Fan for inner air
circuit

12 17 16 15 14

Figure 1.20(c) Cross-sectional view of a large tube-ventilated squirrel cage motor showing the cooling circuit (Cooling system
IC5AIA1) (Courtesy: NGEF Ltd)