CONTROL 4500316 - Caterpillar

Neutral Connections
The generators with a Wye Configuration usually have the neutral ground when the generator is installed. Grounding the neutral is for preventing damage to equipment.If the neutral wire is grounded and one of the phase leads becomes grounded, the excessive current will open a load circuit breaker. Also, the excessive current will cause the generator voltage to collapse. The result depends on the following items: electrical characteristics of the generator, type of fault and trip rating of the circuit breaker. An undervoltage device may be required in order to provide an adequate short circuit protection.There are some cases when the neutral wire is not grounded. An ungrounded generator neutral lead is acceptable when the possibility of grounds to the phase leads has been eliminated. An example of such measures is ground fault protective circuits. Ground fault protection requires the entire group of distribution circuits to be treated as a system. The owner should contact a certified consultant if a new distribution system is being developed. The owner should also contact a certified consultant if an existing system should be modified for the ground fault protection. Single Units
In a three-phase, four-wire system, the neutral wire should be grounded according to local wiring codes. Be sure to check your local wiring codes.5000/6100/7000 Twelve Wire Connection Diagrams
The connections are located in the electrical box that is mounted on top of the generator.Wiring Code A for Three-Phase Configuration
Illustration 1 g00952030
5000 12 wire factory connection for A wiring code
Illustration 2 g02792206
Table 1
L-L Voltage for Wiring Code A    
Winding     50 Hz     60 Hz    
6     190-220     190-240    R448 voltage sensing - 0 => (T3) / 220 V => (T2)Wiring Code D for Three-Phase Configuration
Illustration 3 g00952201
Illustration 4 g02792219
5000 12 wire factory connection for wiring code D
Table 2
L-L Voltage for Wiring Code D    
Winding     50 Hz     60 Hz    
6     380-415     380-480    R448 voltage sensing - 0 => (T3) / 380V => (T2)
Table 3
L-L Voltage for Wiring Code D    
Winding     50 Hz     60 Hz    
9     -     600    Winding 9 R448 voltage sensing and transformer - Request an available wiring diagram, if necessary.5000/6100/7000 Six Wire Connection Diagrams
Wiring Code D for Three-Phase Configuration
Illustration 5 g00996408
Illustration 6 g02792625
5000 6 wire factory connection for wiring code DR448 voltage sensing - 0 => (T3) / 380V => (T2)
Table 4
L-L Voltage for Wiring Code D    
Winding     50 Hz     60 Hz    
9S     -     600    Winding 9S R448 voltage sensing and transformer - Request an available wiring diagram, if necessary.