3
Instruction Leaflet
IL 29C702E
Effective April 2015
Installation Instructions for the HKDDC
Circuit Breaker and Molded Case Switch
EATON CORPORATION www.eaton.com
Figure 4. Load Connected to Power Source. Grounded or
Ungrounded Systems.
Figure 5. Load Isolated from Power Source. Grounded or
Ungrounded Systems. If System Voltage Exceeds 125 Vdc, then
Ungrounded Systems Only.
Table 1. Available Trip Unit Ratings.
Circuit
Breaker
Types
Trip Unit Types
Thermal-Magnetic Amperes I
n
Fixed
Thermal
Adjustable Magnetic
Multiples of I
n
0
0
1
C
D
D
K
H
125
150
175
200
225
250
300
350
400
5 to 10
For adjustable thermal trip units, the magnetic setting is a multiple
of the maximum thermal setting. For Vdc applications, the magnetic
tripping values may exceed the Vac values by 42%.
2. Installation
The installation procedure consists of inspecting the circuit breaker
and, as applicable, installing the trip unit and rating plug, accesso-
ries, interphase barriers and terminals; mounting the circuit breaker;
connecting the line and load conductors; torquing terminals; and
attaching terminal shields. Circuit breaker frames, trip units, acces-
sories, mounting hardware, and unmounted terminals may be sup-
plied in separate packages. To install the circuit breaker, perform the
following steps.
NOTICE
IF REQUIRED, INTERNAL ACCESSORY INSTALLATION IN ANY TYPE OF
CIRCUIT BREAKER SHOULD BE DONE BEFORE THE CIRCUIT BREAKER
IS MOUNTED AND CONNECTED. REFER TO INDIVIDUAL ACCESSORY
INSTRUCTION LEAFLETS.
2-1. Make sure that the circuit breaker is suitable for the intended
installation by comparing nameplate data with existing equipment
ratings and system requirements. lnspect the circuit breaker for
completeness, and check for damage before mounting. Uninstalled
cover mounting hardware is supplied in a plastic bag with the circuit-
breaker frame. (See
Fig. 6
.)
2-2. Remove installed cover screws and cover.
NOTICE
INSTRUCTIONS FOR INSTALLING THE TRIP UNIT AND ACCESSORIES IN
THE K-FRAME CIRCUIT BREAKER ARE SUPPLIED WITH EACH ITEM.
2-3. If not already installed, mount trip unit and accessories (if
required) in circuit breaker frame.
CAUTION
IF REMOVED AND REINSTALLED, THREAD-FORMING SCREWS WILL TRY
TO REFORM THE THREADS IN THE BASE. CARE SHOULD BE TAKEN EVERY
TIME A THREAD-FORMING SCREW IS USED TO ENSURE THE SCREW
STARTS IN THE ORIGINAL THREADS. DAMAGED THREADS CAN RESULT IN
IMPROPER CIRCUIT BREAKER COVER RETENTION.
2-4. Replace cover and install pan-head screws followed by thread-
forming screws as shown in
Fig. 7
. Torque the cover screws to
18-23 lb-in (2-2.6 N.m.).
NOTICE
WHEN USING STEP-TYPE TERMINALS (CATALOG NO. TA401K, TA402K,
TA400K OR T400K), THE TERMINAL COVER SUPPLIED WITH THE TERMI-
NALS MUST BE INSTALLED ON THE CIRCUIT BREAKER AS SHOWN IN FIG.
8. WARNING LABEL SUPPLIED WITH THE KIT MUST BE ATTACHED TO THE
CIRCUIT BREAKER FRONT COVER.
2-5. If not already installed, mount terminals as shown in
Fig. 9
.
Secure the terminals to the circuit breaker using a 7/32 inch socket
wrench and torque to 6-8 Ib-ft (8-11 N.m). After mounting the cir-
cuit breaker and before installation of the conductors, the terminal
mounting screw can be checked or retightened through the terminal
when the conductor screw is removed. If Warning label is supplied
with terminal, place on upper portion of circuit breaker cover.
