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Instructional Booklet
Page 28
Effective: August 2007
Note: If you are replacing the lugs in a 100A SE ATS, the service entrance
breaker must be reinstalled at this time. Also reconnect the jumpers
between the generator breaker (inside the ATS) and the E1, E2 terminals
on the generator (Source 2) side of the contactor. Follow Steps 5 through
10 in Section 7.4.1.9 (for 100A & 200A Service Entrance breaker) and
Step 8 in Section 7.4.1.10 (for 100A & 200A generator breaker).
Step 13: Reattach the red wires to the contactor. Examine each
wire to find the name then refer to Figure 32 for the cor-
rect connection point.
Step 14: Reconnect all wire cables to the contactor as per their
original connections.
Step 15: Apply utility (Source 1) power and place the generator
control selector switch in the "AUTO" position after the
service entrance breaker has been replaced. Test the
system for proper functionality.
7.4.1.8 Replacing the 200 A LUGS
Figure 39. Replacing the 200 A Lug - Lug Location
Note: If you are replacing the lugs in a 100A SE ATS, the service entrance
breaker must be removed first. Also jumpers between the generator
breaker (inside ATS) and the E1, E2 terminals on the generator (Source 2)
side of the contactor must be removed. Follow Steps 1 through 4 in Sec-
tion 7.4.1.9 (for 100A & 200A Service Entrance breaker) and steps 3 & 4
in Section 7.4.1.10 (for 100A & 200A generator breaker).
Step 1: Turn the utility (Source 1) power off and turn the genera-
tor (Source 2) control selector switch to the "OFF" posi-
tion before attempting to replace the service entrance
breaker.
Step 2: Disconnect all wire cables from the contactor.
Step 3: Note their location then disconnect the red wires from the
contactor (see Figure 32).
Note: All wires connected to the contactor are labeled to ease
identification.
UTILITY LUGS
GENERATOR LUGS
LOAD LUGS
For more information visit: www.eaton.com
O & M Manual for the CHGENLC Automatic
Transfer Switch with ATC-100 Control
For SE ATSs only.
Step 4: Remove the hardware securing the utility bus extensions
to the contactor and SE Breaker. Remove the utility bus
extension.
Figure 40. Utility Bus Extensions on a 200 A SE ATS.
For all ATSs.
Step 5: 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 6: Remove the load lugs first by removing the four (4) Phil-
lips screws from the back of the contactor using a Phillips
screwdriver. The load bus extension and load lugs can
now be removed by sliding it away from the contactor
(see Figure 41).
Figure 41. Replacing the 200 A Lugs
Step 7: Remove each load lug from the load bus using a blade
screwdriver or 5/16 in. socket or nut driver.
Step 8: Next, insert a blade screwdriver or 5/16 in. socket or nut
driver up through the load lug terminal hole and remove
the hardware securing the two (2) generator lugs (see
Figure 41). Remove the generator lugs.
For SE ATS, skip this step
Step 9: Remove the hardware securing the 2 utility lugs using a
blade screwdriver or 5/16 in. socket or nut driver.
Remove the utility lugs.
IB00405002E
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