5
Instruction Leaflet
IL 29C702E
Effective April 2015
Installation Instructions for the HKDDC
Circuit Breaker and Molded Case Switch
EATON CORPORATION www.eaton.com
2-6. To mount the circuit breaker, perform the following steps:
a. For individual surface mounting, drill mounting panel using the
drilling plan shown in
Fig. 10
. For panelboard mounting, only load
end support mounting holes are required. For dead front cover
applications, cut out cover to correct escutcheon dimensions, see
Fig. 11
.
b. If circuit breaker includes factory or field installed internal acces-
sories, make sure that accessory wiring can be reached when
the circuit breaker is mounted.
NOTICE
LABELS WITH ACCESSORY CONNECTION SCHEMATIC DIAGRAMS ARE
PROVIDED ON THE SIDE OF THE CIRCUIT BREAKER. A NOTE SHOULD BE
MADE OF THE DIAGRAMS IF THE LABELS CANNOT BE SEEN WHEN THE
CIRCUIT BREAKER IS MOUNTED.
c. Position circuit breaker on mounting surface.
d. Install circuit breaker mounting screws, washers, and nuts.
Tighten screws firmly, but do not exceed 28 pound-inches (3
N.m).
CAUTION
WHEN ALUMINUM CONDUCTORS ARE USED, THE APPLICATION OF
A SUITABLE JOINT COMPOUND IS RECOMMENDED TO REDUCE THE
POSSIBILITY OF TERMINAL OVERHEATING. OVERHEATING CAN CAUSE
NUISANCE TRIPPING AND DAMAGE TO THE CIRCUIT BREAKER.
When a dual conductor terminal (Catalog No. TA400K, TA401K, or
T400K) is installed on the circuit breaker and a single conductor is
used, the conductor should be installed in the terminal opening near-
est to the circuit breaker terminal mounting conductor.
Figure 10. Circuit Breaker Mounting Bolt Drilling.
Figure 11. Circuit Breaker Escutcheon Dimensions for 3-Pole
Circuit Breakers.
2-7. Connect line and load conductors and accessory leads.
2-8. If required, install terminal shield on circuit breaker cover with
mounting screws provided.
2-9. After the circuit breaker is installed, check all mounting hard-
ware and terminal connecting hardware for correct torque loading.
Torque values for line/load terminals are given in
Table 2
and on the
circuit breaker nameplate.
Manual Operation
Manual operation of the circuit breaker is controlled by the circuit
breaker handle and the PUSH-TO-TRIP button in the trip unit. The cir-
cuit breaker handle has three positions, two of which are shown on
the cover with raised lettering to indicate ON and OFF. On the sliding
handle barrier, ON, OFF, and trip are also shown by a color-coded
strip for each circuit breaker handle position: red for ON, white for
tripped, and green for OFF. (See
Fig. 12
).
Circuit Breaker Reset
After an automatic or accessory initiated trip, or a manual PUSH-
TO-TRIP operation, the circuit breaker is reset by moving the circuit
breaker handle to the extreme OFF position.
NOTICE
IN THE EVENT OF A THERMAL TRIP IN A THERMAL MAGNETIC TYPE TRIP
UNIT, THE CIRCUIT BREAKER CANNOT BE RESET UNTIL THE THERMAL
ELEMENT IN THE TRIP UNIT COOLS. NO CIRCUIT BREAKER SHOULD BE
RECLOSED UNTIL THE CAUSE OF TRIP IS KNOWN AND THE SITUATION
RECTIFIED.
PUSH-TO-TRIP Button
The PUSH-TO-TRIP button checks the circuit breaker tripping func-
tion and is used to periodically exercise the operating mechanism in
thermal-magnetic trip units. The button is designed to be operated
by a small screwdriver.
Trip Units
For additional information on thermal-magnetic trip units, refer to l.L.
29C603 (IL supplied with trip unit.)
