STUD 2249907 - Caterpillar

Winding Connections
The wiring connections that are used between the generator and the EMCP 4 depend upon the winding configurations of the generator. Refer to the following connection diagrams.
Illustration 1 g02286733
Three-phase, four-wire, series, or parallel Wye (star) configuration
Illustration 2 g02286773
Three-phase, four-wire, delta configuration
Illustration 3 g02286775
Three-phase, three-wire, delta configuration
Illustration 4 g02286776
Single-phase, three-wire, double delta configuration
Illustration 5 g02286854
Single-phase, two-wire, double delta configuration
Illustration 6 g03515940
Single-phase, three-wire, L2-N-L3, zig-zag configuration
Illustration 7 g03515942
Single-phase, two-wire, L2-L3, zig-zag configuration
Transformer Connections
In order to monitor the generator output voltages greater than 600V, potential transformers (PTs) must be used.Note: The EMCP 4 must be programmed when connecting external PTs. Reference: Systems Operation, "Setpoint Programming" and Testing and Adjusting, "Electronic Control Module (Generator Set) - Configure".Note: The wye configuration of external PTs is preferred for 4-wire wye generators because of the greater accuracy when loads are unbalanced. With the open delta configuration, some power parameters cannot be determined. These parameters are real power