WASHER 1D0688 - 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)
Illustration 2 g02286773
Three Phase Four Wire Delta
Illustration 3 g02286775
Three Phase Three Wire Delta
Illustration 4 g02286776
Single Phase Three Wire (Double Delta)
Illustration 5 g02286854
Single Phase Two Wire (Double Delta)
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 phase A, B, C, and power factor phase A, B, C. For maximum accuracy, the open delta configuration of external PTs should be used only for 3-wire delta generators.