Instructional Booklet
Page
20
Effective: July 2008
O & M Manual for the EGS AutomaticTransfer Switch
with RTC-50 Control and Integral Loadcenter - 100 Amp
For more information visit: www.eaton.com
IB70-8671
For All ATSs
Step 4:
Remove the four (4) screws securing the contactor to the
base plate using a blade screwdriver or 0.25 in. socket or
nut driver.
Step 5:
Remove the two (2) generator lugs and the two (2) load
lugs using a blade screwdriver (see Figure 21).
Step 6:
Once the load lugs have been removed, insert a blade
screwdriver up through the circular hole in the load lug
bus and remove screws securing the two (2) generator
lugs.
Step 7:
Place the new utility lugs on the utility bus so the anti-
turn protrusions fit in the holes. Once the lugs are in
place, take one (1) supplied control wire terminal and
hold it underneath the bus. Using one (1) screw and one
(1) washer supplied, tighten the control wire terminal and
lug to the utility bus. Repeat the process of the second
utility lug. Ensure that no gaps are present between the
lugs and bus.
Step 8:
Place the new generator lugs on the generator bus.
Once the lugs are in place, take one (1) supplied control
wire terminal and hold it underneath the bus. Using one
(1) screw and one (1) washer supplied, tighten the con-
trol wire terminal and lug to the generator bus. Repeat
the process of the second generator lug. Ensure that no
gaps are present between the lugs and bus.
Step 9:
Secure the load lugs to the load bus using the hardware
supplied.
Note:
The load lugs do not require control wire terminals.
Step 10:
Secure the contactor to the base plate using the four (4)
screws supplied.
Step 11:
Reattach the red wires to the contactor. Examine each
wire to find the name then refer to Figure 21 for the cor-
rect connection point.
Step 12:
Reconnect all cables to the contactor as per their original
connections.
Step 13:
Apply utility (Source 1) power and place the generator
control selector switch in the “AUTO” position after the
lugs have been replaced. Test the system for proper
functionality.
7.5 Troubleshooting
Table 5 contains troubleshooting information for the EGS ATS. If
a problem still exists after completing the troubleshooting proce-
dures, contact an authorized Eaton sales representative.
Table 5. Troubleshooting Chart.
PROBLEM
CAUSE
CORRECTION
The automatic transfer switch does not transfer to the generator.
1. The generator breaker is open.
2. The generator voltage is not acceptable.
1. Reset the generator circuit breaker.
2. Refer to the generator User's Manual.
The automatic transfer switch does not transfer to the utility.
1. The service disconnect breaker is open.
2. The utility voltage is not acceptable.
1. Reset the service disconnect breaker.
2. Wait for the utility voltage to return to normal.
The generator is still running after the transfer switch transfers to the utility. Engine cool down period.
The engine should stop after the cool down.
