9
Instruction Booklet
IB0162063EN
Effective January 2014
O & M Manual for the EGS Metered, Service
Entrance Automatic Transfer Switch with Relay Control
Eaton Corporation www.eatoncanada.ca
4.7 Installation
In a typical installation (see Figure 11), the generator (2) and util-
ity power connect to the metered ATS (1). Power from the utility
or the generator (2) is fed to the main circuit breaker panel from
the ATS (1). The circuit breaker in the metered ATS is the service
entrance disconnect for the installation.
When the utility power fails, the Generator will sense the failure, the
generator will start, and when sufficient generator voltage is avail-
able, the ATS will switch. All loads will receive power from the gen-
erator. When utility power returns, the ATS will switch all power
back to the utility source and the generator will shut down after its
defined cooled down period.
Figure 10. Typical Installation of a Residential ATS.
Figure 11. One Line Diagram of a Typical Installation.
4.7 Generator Transfer Connection
The generator transfer contact connection terminal blocks are locat-
ed beside the contactor near the side of the enclosure.
ote:
N
Prior to making the generator transfer connection to the aTS, set the genera-
tor control selector switch to the OFF position to prevent an unwanted generator
start. Control wiring, such as the generator transfer wires and utility sensing, must
be run in a separate conduit from the power cables.
Watt-Hour
Meter
Generator
(Source 2)
Utility
(Source 1)
Circuit
Breaker
Main
Breaker
Panel
Household
Loads
Metered Transfer Switch
Circuit
Breaker
Use the proper wire size as listed by the generator set (Genset)
manufacturer.
Figure 12. Connection of the Generator Transfer Signal (23, 194).
4.8 Preliminary Checks
After the ATS enclosure is installed and power cables are connected
to the equipment, thoroughly inspect the unit to ensure that no tools
were left inside and that the cabinet is free of debris. If necessary,
use a vacuum cleaner to remove any and all construction or installa-
tion debris from the equipment.
Read and understand all labels on the equipment. Review and
understand the wiring diagrams supplied with the equipment. Note
any optional accessories that may have been furnished with this unit
and review their operation.
Verify that the phase-to-phase line voltages of both the utility and
generator power sources are the same and that they match the
rated voltage as indicated on the ATS ratings label.
CaUTiOn
SEVErE EQUiPMEnT DaMagE Can rESULT iF THE UniT iS nOT aPPLiED
aT PrOPEr VOLTagE. DO nOT EnErgiZE THE EQUiPMEnT iF THE SUPPLY
VOLTagES DO nOT MaTCH EQUiPMEnT raTingS LaBEL.
Generator
Transfer
Contacts
