PISTON GP 4866166 - Caterpillar

Main Connection
The electrical connections of the generator are the responsibility of the end user and must be done by qualified people.The main cable connections must be made in accordance with the schematics in Systems Operation, Test and Adjust, UENR5951. Use the torque shown in Table 1 for attaching cables.
Table 1
Screw Diameter     Torque (in Nm)    
M5     5 to 6    
M8     20 to 25    
M10     39 to 49    
M12     64 to 84    
M16     165 to 206    Note: Make sure the size and insulation of the cables are suitable for the current and voltage of the generator.Note: Before making electrical connections from the generator to the load or power grid, check the insulation resistance of the windings of the generator. Refer to the table for "Insulation Resistance Value" in Systems Operation, Test and Adjust, UENR5951, "Insulation - Test" section.Grounding
Illustration 1 g03779004
(1) Generator ground cable connectionThe generator must always be grounded with a cable (1) to a terminal located at the terminal box. Refer to Illustration 1.Terminal Identification
Table 2
Terminal Identification    
Description     Connection    
Main terminals (connection cables of the stator phases)     1, a, 12, N    
   
Voltage Regulator Terminal Connections    
Feedback for single-phase voltage     E1 or E2 (brown)    
Common for the supply circuit and feedback power for single phase operation of the voltage regulator     E3/4 (green)    
Feedback for three-phase voltage     R (blue), S (gray) and T (orange)    
Supply of the power circuit of the voltage regulator     3 (yellow)    
Main exciter field     F+ (red) and F- (black)    Voltage Connection Diagrams
Three-Phase Generators with 12 Terminals
Star (WYE) Series with Access to Neutral
Illustration 2 g03779474
Table 3
Frequency    Connections    Voltage (V)    
60Hz     L to L     380    
L to N 220    
E1 - E3/4 (Reference) 190    
50Hz     L to L     380    
L to N 220    
E1 - E3/4 (Reference) 190    Star (WYE) Parallel with Access to Neutral
Illustration 3 g03779475
Table 4
Frequency     Connections     Voltage (V)    
60Hz     L to L     220    
L to N 127    
E1 - E3/4 (Reference) 220