4
Instruction Leaflet
IL29C203J
Installation Instructions for Motor Operator for
L-Frame and MDL-Frame Circuit Breakers and
Molded Case Switches
EATON CORPORATION
www.eaton.com
2-4 For L-Frame Mount breaker with (4)
special mounting studs supplied. Assemble
mounting clamp to the studs on line end of
the breaker using the (2) 10-32 x 1.50” flat
head screws supplied.
For MDL-Frame: Remove (4) breaker cover
screws. Insert keyhole clamp into line-end,
right side cover screw hole above the
breaker handle.
2-5 For L-Frame turn breaker to the “Off”
position. Attach the handle extension from
the parts kit. Mount the motor operator to
the circuit breaker using (2) 10-32 x 7/16”
long screws and lock washers on the line
end and using (2) 10-32 x 1.5” long screws
and lock washers on the load end.
For MDL-Frame turn breaker to the “Off
position. Attach the handle extension from
the parts kit. Mount the motor operator by
placing the keyhole slot in the motor
operator frame over the keyhole clamp and
sliding it into position. Install the (3) 8-32 x
2.25” button head screws in the remaining
cover holes from step 2-4.
Torque each screw to 20-22 lb-in (2.26-2.49
N-m). The handle extension must be located
between the rollers of the operator bracket
assembly, and the motor end of the operator
is positioned towards the line end of the
breaker (Figure 4-1).
2-6 The motor operator is equipped with
two “PUSH-TO-TRIP” actuators for use on
either solid state (left hand actuated) or
thermal magnetic (right hand actuated) trip
units. Mount the red “PUSH-TO-TRIP”
BUTTON MOLDING TO THE CORRECT
ACTUATOR USING THE (2) 4-40 X .25
LONG SEMS SCREWS SUPPLIED. Then
turn on the circuit breaker, press the “PUSH-
TO-START” button, to verify the breaker
trips.
2-7 To connect the power and control
wiring, refer to (figure 2-2).
2-8 Replace the motor operator cover and
screws. If dust cover sliders become
separated from the operator cover, they
must be installed in a proper orientation.
Viewing the cover from the rear with the
“PUSH-TO-TRIP” slot on the bottom. The
smaller plate is placed on the medium plate
which is placed on the longest plate, then to
the inner cover surface located under the
guide rails
2-9 To verify the manual operation of the
motor operator, refer to paragraphs 3.5 to
3.7.
2-10 To verify the electrical operation of the
motor operator, refer to paragraphs 3.1 to
3.4.
2-11 To adjust the motor operator if it fails to
fully open, close or reset the circuit breaker
during the electrical operation, refer to
paragraphs 4.1 to 4.5.
