PLATE 1750324 - Caterpillar

128-7424 Generator Ar
Table 9
MAIN STATOR AND ROTOR WINDING DATA    
ITEM     STATOR     ROTOR    
Stack Height    
914.4 mm (36 inch)    
927.1 mm (36.5 inch)    
Slots     72     4    
Coil Throw     1 - 10     1 - 2    
Turns/Coil     2     -    
Turns/Pole     -     163.5 (3)    
No. & Wire Size     2 -
3.6576 mm (0.144 inch) x
5.1816 mm (0.204 inch)     1 -
3.6576 mm (0.144 inch) X
7.31520 mm (0.288 inch)    
Mean Length Turn    
2824.48 mm (111.2 inch)    
2311.4 mm (91 inch)    
Copper Weight    
288.30 kg (635.6 lb)    
549.7 kg (1212 lb)    
Inside Connection (1)     6 Parallel Wye     Series    
Line Leads (No. & Size)     6-6 # 000 (36 total)     2 of #6 Ld    
Low Voltage connected line resistance at
25° C (77.0° F)     0.00193 ohms     -    
Field lead resistance at
25° C (77.0° F)     -     1.522 ohms    
EXCITER WINDING DATA    
ITEM     STATOR (FIELD)     ROTOR (ARMATURE)     Permanent Magnet Stator    
Exciter Frequency (Hz)     80 Hz     80 Hz     160 Hz    
Exciter Poles     8     8     16    
Stack Length    
88.90 mm (3.5 inch)    
88.90 mm (3.5 inch)    
31.750 mm (1.25 inch)    
Coils/Group     1     1     1    
Turns (Coils)     160     16     17    
No. & Size Wire     1 of #18 GCU180 2 of #17 GCU170     3 of #16     2 of #17 GCU170    
Coil Throw     1 - 2     1 - 6     1 - 4    
Mean Length Turn    
355.6 mm (14 inch)    
419.10 mm (16.5 inch)    
2209.8 mm (87 inch)    
Resistance at
25° C (77.0° F)     3.2 ohms     0.122 ohms     0.509 ohms    
Copper Weight    
14.01 kg (30.9 lb)    
6.3 kg (14 lb)    
0.566 kg (1.25 lb)    
Connection (2)     Series     2 Parallel Wye     Wye    
Line Leads     2 of #14 Ld     3 of #10 wire     3-1 of #14    
( 3 ) Winding table: wind 4-layers-15 turns, 2-layers-14 turns, 1-layer-13 turns, 1layer-12 turns, 1-layer-11turns, 1-layer-10 turns, 1-layer-9 turns, 1-layer-8 turns, 1-layer -6.5 turns, 1-layer-6 turns = 163.5 turns.
( 1 ) See Specifications, "Connection Diagrams for Main Stator and Main Rotor" Connection Diagram 63
( 2 ) See Specifications, "Connection Diagrams for Exciter" Connection Diagram D