V-BELT 6F1992 - Caterpillar

Winding Connections
The wiring connections that are used between the generator and the EMCP 3 depend upon the winding configurations of the generator. Refer to the following connection diagrams.
Illustration 1 g01512173
Three phase four wire (series or parallel) wye (star)
Illustration 2 g01512193
Three-phase four-wire delta
Illustration 3 g01512213
Three-phase three-wire delta
Illustration 4 g01512215
Single phase three-wire (double delta)
Illustration 5 g01512236
Single phase two-wire (double delta)Transformer Connections
In order to monitor the generator output voltages greater than 600 V, potential transformers must be used.Note: The EMCP 3 must be programmed when connecting external potential transformers.ReferenceSystems Operation, RENR7902, "Setpoint Programming" and Testing and Adjusting, "Electronic Control Module (Generator Set) - Configure".Note: The wye configuration of external potential transformers is preferred for 4-wire wye generators. The preference is due to the greater accuracy when loads are unbalanced. With the open delta configuration, some power parameters cannot be determined. The parameters are real power phase A, B, C, and power factor phase A, B, C. For maximum accuracy, the open delta configuration of external potential transformers should be used only for 3-wire delta generators.
Illustration 6 g01228369
Wye configuration with external potential transformers for the 4-wire wye generatorThe wye configuration allows the accurate measurement of all power parameters by the EMCP 3. Accurate measurement is possible even when the loads are unbalanced and neutral current is present. All power parameters are shown on the display of the EMCP 3. The EMCP 3 configuration parameter" Generator Connection Configuration" must be set to wye or star.
Illustration 7 g01228370
Open delta configuration of external potential transformers for the 3-wire delta generatorNote: The open delta configuration for 3-wire delta generators allows the accurate measurement of power parameters by the EMCP 3. Accurate measurement is possible even when the loads are unbalanced and circulating current is present. The real power phase A, B, and C cannot be determined. The power factor phase A, B, and C cannot be determined. The phases are not shown on the EMCP 3 display. The EMCP 3 configuration parameter "Generator Connection Configuration" must be set to "delta 3-wire".
Illustration 8 g01228371
Open delta configuration of external potential transformers on the 4-wire wye generatorNote: The open delta configuration for 4-wire wye generators results in less accurate measurement of all power parameters by the "EMCP 3". The open delta configuration results in less accurate measurement when the loads are unbalanced and neutral current is present. Real power phase A, B, C and power factor phase A, B, C cannot