Instructional Booklet
Page
18
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
7.4.1.3 Ground Bar
Figure 17. Replacing the Ground Bar.
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 ground bar
Step 2:
Disconnect all wire cables from the ground bar.
Step 3:
Remove the screws securing the ground bar using a blade
screwdriver or 0.375 in. socket or nut driver (see
Figure 17). Remove the ground bar.
Step 4:
Secure the new ground bar to the base plate using the
hardware supplied.
Step 5:
Reconnect all wire cables to the ground bar.
Step 6:
Apply utility (Source 1) power and place the generator
control selector switch in the “AUTO” position after the
ground bar has been replaced. Test the system for proper
functionality.
7.4.1.4. Replacing the Contactor
Figure 18. Replacing the Contactor.
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 contactor.
Step 2:
Note their location then disconnect the twelve (12) red
wires from the contactor (see Figure 18).
Note:
All wires connected to the contactor are labeled to ease
identification.
Step 3:
Remove the four (4) screws securing the contactor to the
base plate using a blade screwdriver or 0.25 in. socket or
nut driver. Remove the contactor.
Step 4:
Following the replacement steps for the 100 A lugs (see
Sections 7.4.1.6), remove the lugs from the old contactor
then install the lugs on the new contactor.
Step 5:
Secure the contactor onto the base plate using the hard-
ware supplied.
Step 6:
Reattach the twelve (12) red wires to the contactor.
Examine each wire to find the name then refer to Figure
18 for the correct connection point.
Step 7:
Reconnect all wire cables to the contactor as per their
original connections.
Step 8:
Apply utility (Source 1) power and place the generator
control selector switch in the “AUTO” position after the
contactor has been replaced. Test the system for proper
functionality.
MOUNTING
SCREWS
GROUND BAR
N2
N1
E2
E1
UTILITY
COIL
GENERATOR
COIL
GENERATOR AUX.
SWITCH
UTILITY AUX.
SWITCH
