Eaton Cutler-Hammer EGS Serie Mode D'emploi Et D'entretien page 11

O & M Manual for the EGS Automatic
Transfer Switch with RTC-50 Control
1
3
Control
Wiring
Figure 13. Typical Installation of a Residential ATS.
The ATS (1) and generator (2) are connected to the power supply.
The automatic transfer switch is located between the emergency
distribution (3) and the utility panel (4).
When the utility power fails, the ATS will sense the failure, the
generator will start , and when sufficient generator voltage is
available, the ATS will switch all loads to the emergency panel.
All emergency loads will receive power from the generator. A line
breaker is required between the generator power source and the
transfer switch (see Figure 14). When utility power returns, the
ATS will switch all power back to the utility panel and the genera-
tor will shut down.
Utility
(Source 1)
Watt-Hour
Meter
Emergency Distribution Panel
Figure 14. Diagram of a Typical Installation (Critical Loads Only).
IB00405003E - 70-8662
Power
Cables
4
2
Non-Critical
Loads
Utility Panel
Generator
Transfer
Switch (Source 2)
Circuit Breaker
(typically included
in Genset)
Critical
Loads
For more information visit: www.eaton.com
Effective: July 2008
In addition, another typical installation for loads can be considered
(see Figure 15). Refer to Figure 16 for a loads connection dia-
gram.
Figure 15. Typical Installation of a Residential ATS.
The switch (1) and generator (2) are connected to the power sup-
ply. The ATS is located between the utility and the loads.
With optional feature 37,
this Transfer Switch is
intended as service
entrance equipment.
Utility
(Source 1)
Circuit
Watt-Hour
Breaker
Meter
Figure 16. Diagram of a Typical Installation (All Loads).
4.7 Generator Utility Sensing Connection
The generator utility sensing connections are located on the fuse
block that is installed at the bottom of the power panel. The utility
sensing wires, required for proper generator operation, are con-
nected at this point.
Note:Prior to making the generator utility sensing connection to the ATS,
set the generator control selector switch to the OFF position to prevent an
unwanted generator start. Control wiring, such as the generator utility
sensing wires, must be run in a separate conduit from the power cables.
Use the proper wire size as listed by the generator set (Genset)
manufacturer.
This ATS is intended for use on generators with built in auto start
features. These generators sense, and react to, utility power.
Remote starting contacts are not provided in this transfer switch.
Instructional Booklet
Note:
Transfer Switch Generator
Circuit
(Source 2)
Breaker
Main
Breaker
Panel
Household
Loads
Page 11