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
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.
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
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.
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.
Connecting the genset AC electrical system involves the following:
zInstallation of a transfer switch (standby applications only)
zGenerator voltage connections
zLoad connections
zStandard and optional AC equipment connections (e.g. control box heater, coolant heater, etc.)
AC ELECTRICAL CONNECTIONS
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.
Improper wiring can cause a fire or electrocution, resulting in property damage, severe injury, or even death!
Before starting the genset, verify
NOTEthat 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
INDUSTRIAL GENERATOR SETS — APPLICATION & INSTALLATION MANUAL — REV. #4 (09/07/07) — PAGE 73