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INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07) — PAGE 73
AC ELECTRICAL CONNECTIONS
Overview
This section provides the procedure that is used to connect
the AC electrical system of the Industrial generator set.
As with all servicing, disconnect the battery charger and
the battery cables (negative [-] first) to prevent accidental
starting before working on unit.
Local regulations often require that wiring connections be
made by a licensed electrician, and that the installation be
inspected and approved before operation. All connections,
wire sizes, materials used, etc. must conform to the
requirements of all electrical codes in effect at the
installation site.
Before starting the genset, verify
that all electrical connections are
secure, and that all wiring is
complete. Replace and secure
any access panels that have
been removed during installation.
Check that the load cables from the genset are properly
connected.
Transfer Switch
In a standby application, a transfer switch (Figure 35) must
be used for switching the load from the normal power source
to the genset. Either a manual or automatic transfer switch
may be used. Follow the installation instructions provided
with the transfer switch when connecting the load and control
wiring. Only a licensed electrician should perform the
installation of a transfer switch.
Figure 35. Typical Transfer Switch
Connecting the genset AC electrical system involves the
following:
z
Installation of a transfer switch (standby applications
only)
z
Generator voltage connections
z
Load connections
z
Standard and optional AC equipment connections (e.g.
control box heater, coolant heater, etc.)
NOTE
Backfeed to a utility system can cause property damage,
personal injury, or even
death
! DO NOT connect to any
buildings electrical system except through an approved device
and after the building main switch is opened. When connecting
to a building's electrical system, always have a licensed
electrician perform the installation.
Accidental starting of the generator set while working on it can
cause severe personal injury or even
death
. Prevent
accidental starting by disconnecting the starting battery cables
(negative [-] first).
Always disconnect a battery charger from its AC source before
disconnecting the battery cables. Failure to do so can result in
voltage spikes high enough to damage the DC control circuits.
Each of the operations described in this section should be
done only by persons trained and experienced in electrical
maintenance. Improper procedures may result in property
damage, bodily injury, or even
death
.
Improper wiring can cause a fire or electrocution, resulting
in property damage, severe injury, or even
death
!