TURBOCHARGER GP 2572205 - Caterpillar

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10 Lead Wye Configuration - Low Voltage (for 3306B and 3406C generator sets only)
Terminal T0 is the neutral lead.
12 Lead
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12 Lead Wye Configuration - High Voltage
Terminals T10, T11, and T12 become neutral connection when the terminals are tied together.
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12 Lead Wye Configuration - Low Voltage
Terminals T10, T11, and T12 become neutral connection when the terminals are tied together.
Delta Configuration Diagrams
6 Lead
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6 Lead Delta Configuration
12 Lead
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12 Lead Delta Configuration
Terminals T6 and T9 become the neutral connection when the terminals are tied together and grounded. This configuration reflects the terminal T2 and T10 connection as the high phase.
SR500 Configurations
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SR500 12 Lead Wye Configuration High Voltage
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SR500 12 Lead Wye Configuration Low Voltage
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SR500 12 Lead Delta Configuration
Grounding the Frame
In any generator set installation, the frame of the generator must be positively connected to an earth ground or to the hull of a vessel. This connection is the first one that is made at the installation. This connection is the last one that should be removed. If the generator set is on flexible or resilient pads, the ground connection must be flexible to avoid possible breakage in later operation.Ground connection cable or straps should have at least the current carrying capacity of the largest lead to the connected load. Joints in cables or straps must be clean, free of electrical resistance, and protected from possible oxidation. Bolted ground connection joints eventually oxidize. The joints are frequent sources of radio frequency interference (RFI). Silver soldered and bolted joints are electrically and mechanically sound.Neutral Connections
The generators with Wye Configuration usually have the neutral ground when the generator is installed. However, there are some cases when definite measures which can be taken to prevent grounds on the load side. The purpose of the grounding of the neutral is to prevent load side equipment damage.If the neutral wire is grounded and one of the phase leads becomes grounded, the excessive current will open a load circuit breaker. The excessive current will also collapse the generator voltage. The result depends on the particular generator electrical characteristics, type of fault and trip rating of the circuit breaker. An undervoltage device may be required to provide an adequate short circuit protection.There are some instances in which grounding the neutral wire is not desirable. An ungrounded generator neutral lead is acceptable in the applications in which definite measures have been taken to prevent grounds to the phase leads. An example of such measures is ground fault protective circuits. Ground fault protection requires that the entire group of distribution circuits should be studied and treated as a system. The owner should engage a certified and registered consultant if a new distribution system is being developed. The owner should also engage a certified and registered 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.In applications, in which definite measures are taken to prevent grounds to