TUBE AS 4N1413 - Caterpillar

Three-Phase Voltage Connections
The Wye Configuration for a 480 V generator and the Delta Configuration for a 240 V generator are given in the following diagrams.The terminals must be connected securely. The terminals must also be insulated with a good quality electrical tape.If a Delta Configuration with grounded neutral is being used, a two-thirds winding assembly is recommended. If the generator winding pitch is not two-thirds, third harmonics will cause a high neutral current. This current can damage the wiring, which may cause a fire hazard. A floating neutral does not require a two-thirds pitch winding.Wye Configuration Diagrams
6 Lead Generators
Illustration 1 g00626053
Typical Wye Configuration (60 Hz, 6 Lead)12 Lead Generators
Illustration 2 g00637319
Typical Series Wye Configuration (60 Hz, 12 Lead) This is a typical high voltage connection.
Illustration 3 g00637320
Typical Parallel Wye Configuration (60 Hz, 12 Lead)This is a typical high voltage connection.Delta Configuration Diagrams
6 Lead Generators
Illustration 4 g00626129
Typical Delta Configuration (60 Hz, 6 Lead)12 Lead Generators
Illustration 5 g00626130
Typical Delta Configuration (60 Hz, 12 Lead)Single-Phase Voltage From a Three-Phase Generator
Three-phase voltage and single-phase voltage can be provided simultaneously from a generator that is connected for three-phase service. In the Wye Configuration, connect the load to the three-phase leads (any two of the three leads). In the Delta Configuration, connect the load to the three-phase leads (any two of the three leads). In both configurations, this connection will provide single-phase voltage at the same voltage as three-phase voltage.Connect the load to any phase lead and neutral lead of the Wye Configuration. This will produce voltage at 58% of three-phase voltage.In the Delta Configuration that produces 240 Volts, 60 Hz, three-phase power, the voltages will be the following:
208 Volts between the high phase and neutral
240 Volts between either one of the low phases and neutralRefer to Operation Section, "Generator Operation" for allowable single-phase loading unbalance.Do not exceed the nameplate current rating for any one phase.Wye Configuration Diagrams
6 Lead Generators
Illustration 6 g00626132
Single-Phase Voltage Diagram with 6 Lead Wye Configuration12 Lead Generators
Illustration 7 g00637321
Single-Phase Voltage Diagram with 12 Lead Wye ConfigurationDelta Configuration Diagrams
6 Lead Generators
Illustration 8 g00626135
Single-Phase Voltage Diagram with 6 Lead Delta Configuration12 Lead Generators
Illustration 9 g00626136
Single-Phase Voltage Diagram with 12 Lead Delta Configuration