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c. Lay a 100 mm (4 in.) thick concrete pad on the
gravel layer.
stub-ups for the fuel supply and electrical
conduit.
See the corresponding dimension
drawing in Section 7 for the mounting pad
dimensions, mounting bolts, and stub-up
locations.
3.3 Lifting Generator Set
WARNING
Unbalanced weight.
Improper lifting can cause severe
injury or death and equipment
damage.
Do not use lifting eyes.
Lift the generator set using lifting bars
inserted through the lifting holes on
the skid.
Open generator sets weigh approximately 325 kg
(720 lb.). Enclosed units weigh approximately 500 kg
(1100 lb.). Use equipment that is rated for the generator
set's weight to lift the unit into place.
Follow these general precautions when lifting all
generator sets.
When lifting housed units, lift the
weather enclosure and generator set together as one
unit.
D
Do not lift the generator set using the lifting eyes
attached to the engine and/or alternator. These eyes
cannot support the generator set's weight. Instead,
insert lifting hooks or lifting bars through the four holes
in the mounting skid. The placement of the holes
prevents the lifting cables from damaging the
generator set components and maintains balance
during lifting.
D
If the lifting cables contact the air cleaner, guards, or
other protruding components, use spreader bars on
the cables.
If the cables still do not clear the
protruding component(s), temporarily remove the
component(s).
3.4 Mount and Ground Generator
Set
1. Place the generator set on the concrete mounting
pad. Secure the generator set with mounting bolts
anchored in the concrete pad.
TP-6727 10/11
Include mounting bolts and
2. Ground the generator set. The grounding method
must comply with NEC and local codes. Connect
the grounding strap to the generator set ground
lug,
terminal
GRD
compartment. See Figure 3-1. On units with the
customer connection box shown in Figure 3-2,
connect the ground to the GND terminals on
terminal block TB2.
Kohler generator sets are shipped from the factory
with the neutral attached to the alternator in the
junction box. At installation, the neutral can remain
grounded at the alternator or be lifted from the
grounding stud and isolated if the installation
requires an ungrounded neutral connection at the
generator set.
The generator set will operate
properly in either configuration.
Various
regulations
including the National Electrical Code (NEC), local
codes, and the type of transfer switch used in the
application determine the grounding of the neutral
at the generator. NEC 2002 Section 250.20 is one
example that has a very good explanation of the
neutral grounding requirements for generators.
3
2
1
6
5
1. Neutral (L0) connection
2. Ground (GRD) connection
3. Relay interface board (RIB; standard 3--relay board shown)
4. Line circuit breaker location
5. Load lead access opening
6. Customer interface connector location
Figure 3-1 Generator Set Electrical Connections
(units without customer connection box)
Section 3 Installation Instructions
inside
the
controller
and
site
configurations
4
GM69195
27
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