COUPLING-STEERING CLUTCH 6S3249 - Caterpillar

Six Lead Delta Connection
Illustration 4 g01327257
Six Lead Delta Connection Diagram
Table 4
SIX LEAD DELTA CONNECTIONS
Generator Lead Line Lead
Connect T1 and T6 T1
Connect T2 and T4 T2
Connect T3 and T5 T3 Sensing connections for the voltage regulator
On medium voltage generators, sensing isolation transformers are used. The line lead's voltage connects to one side of the sensing isolation transformer. The voltage regulator connects to the other side of the sensing isolation transformer.
On generators up to 600 volts, the leads for the regulator have a direct connection to the generator line leads. The leads for the regulator supply sensing voltage to the regulator. Twelve Lead Delta Connection
Illustration 5 g00611504
Twelve Lead Delta Connection Diagram
Table 5
TWELVE LEAD DELTA CONNECTIONS
Generator Lead Line Lead
Connect T1 and T12 T1
Connect T4 and T7 -
Connect T2 and T10 T2
Connect T5 and T8 -
Connect T3 and T11 T3
Connect T6 and T9 Neutral Generator line leads (T1 through T12) can be made of multiple cables. For example, three generator line leads might be designated as T4. Multiple line leads allow the lead to be flexible. Flexible leads help maintain the current carrying capacity which is required. If generator line leads are similarly marked, these leads should be connected together. These leads should be treated as one conductor. Generator line leads can terminate in the following ways:
End at the terminal strip (bus bar)
Fastened to other leadsFor more information, refer to Testing And Adjusting, KENR5284, "Leads - Connect".Depending on the connections that are made between the load and the generator line leads, single phase voltages and/or three-phase voltages are possible.Grounding the Frame
In any generator set installation, the frame of the generator must be positively connected to an earth ground. This connection is the first connection that is made at the installation. This connection is the last connection that should be removed. The ground connection must be flexible in order to avoid possible breakage in later operation. A customer connection ground bar with the appropriate ground sticker is provided in the terminal box.Ground connection cable or straps should have at least the current carrying capacity of the largest line 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, bolted joints are electrically sound. Silver soldered, bolted joints are mechanically sound.Neutral Connections
The generators with grounded configurations usually ground the neutral connections when the generators are installed. However, there are some cases when definite measures can prevent ground faults on the load side. The purpose of the grounding of the neutral connection is the prevention of equipment damage to the load side. The purpose of the grounding of the neutral is also the prevention of harm to personnel.If the neutral wire is grounded and one of the phase leads becomes grounded, the excessive current will open a load circuit breaker in order to isolate the fault. If the circuit breaker does not trip, the excessive current will