MOTOR GP-PISTON 4230092 - Caterpillar

252-3928 Generator
Table 19
1488 Frame 480 VAC
Main Stator and Main Rotor Winding Data    
Arrangement with Stator RTDs     252-3928         252-3928    
Main Stator and rotor Winding Data     1488            
Item     Main Stator     Main Rotor        
Stack Length    
720 mm (28.34 inch)    
720 mm (28.34 inch)        
Slots     84     4        
Span     1-15     1-2        
Turns per Coil     1     -        
Turns per Pole     -     88 (3)        
Number and Wire Size (AWG)     (6 high) .088 x (1-wide) .197     (1) 3.55 x (1) 6.3mm        
Mean Length Turn    
2356 mm (92.75 inch)    
1960 mm (77.16 inch)        
Copper Weight    
118 kg (260.14 lb)    
140 kg (308.64 lb)        
Internal Connection     4 Parallel Wye     Series        
Internal Connection Diagram     Connection Diagram 1 (1).     Connection Diagram 2 (1)        
Line Leads Number and Size (AWG)     6 Leads, 4 - #3/0 each lead     -        
Low Voltage Connected Line to Line Resistance at
25° C (77.00° F)     0.00253     -        
Field Resistance at
25° C (77.00° F)     -     0.539        
I.E. Winding                
Turns per Coil: Pitch                
Number and Wire Size (AWG)                
Resistance at
25° C (77.00° F)                
I.E. Winding                
Turns per Coil: Pitch                
Number and Wire Size (AWG)                
Resistance at
25° C (77.00° F)                
Internal Connection Diagram                
Exciter Winding Data    
Exciter     Stator (Field)     Rotor (Armature)     Permanent Magnet Stator    
Exciter Frequency (Hz)     180     180     240    
Exciter Poles     12     12     16    
Stack Length    
50 mm (1.96 inch)    
50 mm (1.96 inch)    
25.4 mm (1.000 inch)    
Coils per Group     1     1     1    
Turns per Coil     315     15     24    
Number and Wire Size (AWG)     1 - #14.5     9 - #17     2 - #18    
Pitch     1 - 2     1 - 4     1 - 4    
Mean Length Turn    
330 mm (12.99 inch)    
338 mm (13.30 inch)    
208.28 mm (8.1999 inch)    
Resistance at
25° C (77.00° F)     12.98     0.067     0.87    
Copper Weight    
20.7 kg (45.635 lb)    
8.3 kg (18.298 lb)    
1.8 kg (3.968 lb)    
Magnet Wire Type     Heavy Polyester