Cutler Hammer, Div of Eaton Corp DK, KDB, KD, HKD, KDC Installation Guide

Effective February 2015

Instruction Leaflet IL 29C104E

Supersedes IL 29C104D Dated 02/12

Installation Instruc tions for DK, KDB, KD, HKD, KDC, KW, HKW,
KWC, CKD, CHKD Circuit Breakers and Molded Case Switches

Contents

Introduction . . . .. . . . .. . . .. . . .. . . . . . .. . . .. . . . .2

Installation . . . . .. . . . .. . . .. . . .. . . .. . . . . . .. . . . 3

Replacement of Existing Eaton Circuit Breakers

Types DA, JA, KA, HKA, LB, LBB, HLB . . 6
Manual Operation and Thermal Magnetic Trip

Unit Adjustment . . . . . .. . . . . . . . . .. .7

Inspection and Field Testing .. . . .. . . .. . . .. . . .. 8

Page noitpircseD

Effective February 2015

Installation Instructions for DK, KDB, KD, HKD, KDC, KW, HKW,

KWC, CKD, CHKD Circuit Breakers and Molded Case Switches

WARNING

DO NOT ATTEMPT TO INSTALL OR PERFORM
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER­GIZED. DEATH, SEVERE PERSONAL INJURY, OR
SUBSTANTIAL PROPERTY DAMAGE CAN RESULT
FROM CONTACT WITH ENERGIZED EQUIPMENT.
ALWAYS VERIFY THAT NO VOLTAGE IS PRESENT
BEFORE PROCEEDING WITH THE TASK, AND
ALWAYS FOLLOW GENERALLY ACCEPTED SAFE­TY PROCEDURES.

EATON IS NOT LIABLE FOR THE MISAPPLICATION
OR MISINSTALLATION OF ITS PRODUCTS.

The user is cautioned to observe all recommendations,
warnings, and cautions relating to the safety of person­nel and equipment as well as all general and local
health and safety laws, codes, and procedures.

The recommendations and information contained herein
are based on Eaton experience and judgment, but
should not be considered to be all-inclusive or covering
every application or circumstance which may arise. If
any questions arise, contact Eaton for further informa-
tion or instructions.

1. INTRODUCTION

General Information

The K-frame Series C circuit breaker (Figure 1-1) types
KD, HKD, and KDC are 600 Vac maximum rated
devices with interchangeable thermal-magnetic or elec­tronic (Seltronic) trip units rated 400A maximum continu­ous current. Circuit breaker types KW, HKW, and KWC
are 660 Vac maximum rated devices using interchange­able adjustable thermal/adjustable magnetic or electron­ic trip units rated up to 400A continu
type KDB noninterchangeable trip circuit breaker is rated
600 Vac maximum with a maximum continuous current
rating of 400A. The type DK 240 Vac maximum circuit
breaker is also a noninterchangeable trip device with trip
unit ratings from 250A to 400A. Refer to Table 4-1 on
page 9 for all av
breakers are listed in accordance with Underwriters
Laboratories, Inc. Standard UL489 and satisfy the (P1)
requirements of the International Electrotechnical
Commission Recommendations No. IEC 157-1. Model
W circuit breakers satisfy the requirements of IEC C947-

2. Molded case switches are listed in accordance with
UL 489.

ailable trip unit ratings. Model D circuit

o

us current. The

100 Percent Rated K-Frame Circuit Breakers

CKD and CHKD circuit breakers are suitable for contin­uous operation at 100 percent of the frame rating if
used with an 90°C insulated wire and AL9CU terminals
in an enclosure which measures at least 24” high x 15”
wide x 6” deep. Ventilation is not required in an enclo­sure having these minimum dimensions. CKD and
CHKD 100 percent rated circuit breakers use electronic
trip units only.

Figure 1-1 K-Frame Model D Series C Circuit Breaker
Frame with KT Trip Unit Installed

2

EATON CORPORATION

ers. Instructions are also provided for replacement of
existing Eaton circuit breaker types DA, LB, LBB, HLB,
JA, KA, and HKA. For this publication, the term circuit
breaker shall also include the molded case switch.

Installation Instructions for DK, KDB, KD, HKD, KDC, KW, HKW,
KWC, CKD, CHKD Circuit Breaker and Molded Case Switches

Pan Head Screws

3 - Pole 4 - Pole
No. 8 x 1.63 in, Flat - Head 6 3
.190 - 32 x 3.125 in, Pan - Head 2 7

Flat Head, Thread
Forming Screws

Figure 2-1 Cover Mounting Hardware

Terminal Cover

e installation procedure consists of

Figure 2-3 Terminal Cover Installation

,

Effective February 2015

Dovetails

Mounting
Slots

1

3P

4P

2

2

1

3

1

3P

2

4P

Screw, No. 8x 1.63 Inch, Flat Head, Cross-Recessed,

1

Thread Forming.
Screw .190-32 x 3.125 Inch Pan Head, Cross-Recessed.

2

Note: Hatched lines show additional pole and screw for

4-pole circuit breaker.

Figure 2-2 Cover Screw Installation Positions

2. INSTALLATION

1

3P

2

The installation procedure consist of inspecting the cir-

4P

cuit breaker and, as applicable, installing the trip unit and
rating plug, accessories, interphase barriers, and termi­nals; mounting the circuit breaker; connecting the line

2

and load conductors; torquing terminals; and attaching
terminal shields. Circuit breaker frames, trip units, rating
plugs, accesories, mounting hardware, and unmounted

1

terminals may be supplied in separate packages. To
install the circuit breaker, perform the following steps.

NOTICE

If circuit breaker is replacing a DA, JA, KA, HKA, LB,
LBB, or HLB circuit breaker, refer to section 3 of

2

DK and KDB circuit breakers are factory sealed for
reverse feed applications under UL489. UL requires
that internal accessories be installed at the factory
in these types of circuit breakers.

1

3P

NOTICE

If required, internal accessory installation in any
type of circuit breaker should be done before the

EATONON CORPORATION

3