Illustration 32 g00611608
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
Illustration 33 g00669319
6 Lead Delta Configuration
12 Lead
Illustration 34 g00669312
12 Lead Delta Configuration
Terminals T6 and T9 become the neutral connection
when the terminals are tied together and grounded.
This reflects the terminal T2 and T10 connection as
the high phase.
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 in order to avoid
possible breakage in later operation.
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 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 in order to prevent
grounds on the load side. The purpose of the
grounding of the neutral is to prevent load side
equipment damage.
26
SEBU7125-13
Product Information Section
Generator Lead Connections
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