Eaton JDB Installation Instructions Manual

Marca: Eaton

Modello: JDB

Tipo: Installation Instructions Manual

I.L. 29C103G

JWC Circuit Breakers and Molded Case Switches

nel 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 Cutler-Hammer experience and judgment,

but should not be considered to be all-inclusive or cov-

ering every application or circumstance which may

arise. If any questions arise, contact Cutler-Hammer for

further information or instructions.

1. INTRODUCTION

General Information

The J-frame Series C circuit breaker (Figure 1-1) types

JD, JDB, HJD, and JDC are 600 Vac maximum rated

devices with inter changeable thermal-magnetic trip

units rated 250A maximum continuous current. Circuit

breaker types JW, HJW, and JWC are 660 Vac maxi-

mum rated devices using interchangeable adjustable

thermal/adjustable magnetic or electronic trip units rated

up to 250A continuous current. The type JDB noninter-

changeable trip circuit breaker is rated 600 Vac maxi-

mum with a maximum continuous current rating of

250A. Refer to Table 1-1 for all available trip unit rat-

DO NOT ATTEMPT TO INSTALL OR PERFORM

MAINTENANCE ON EQUIPMENT WHILE IT IS ENER-

GIZED. 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 SAFE-

TY PROCEDURES.

CUTLER-HAMMER IS NOT LIABLE FOR THE MISAP-

PLICATION OR MISINSTALLATION OF ITS PROD-

UCTS.

The user is cautioned to observe all recommendations,

warnings, and cautions relating to the safety of person-

Figure 1-1 J-Frame Model D Series C Circuit Breaker

with JT Trip Unit Installed

WARNING

Circuit Breaker Trip Unit Types

Types Thermal-Magnetic Amperes I

Fixed Adjustable Adjustable

Thermal Thermal Magnetic

of I

JDB 70 5 to 10

JD 90

HJD 100

JDC JW 125 100-125

HJW 150 125-160

JWC

175

200 160-200

225

250 200-250

Not UL listed.

For adjustable thermal trip units, the magnetic setting is a multiple

of the maximum thermal setting.

Table 1-1 Available Trip Unit Ratings

Installation Instructions for JDB, JD, HJD, JDC, JW HJW,

I.L. 29C103G

Page 2

Effective 1/10

ings. Model D circuit 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 require-

ments of IEC 947-2. Molded case switches are listed in

accordance with UL 489.

This instruction leaflet (IL) gives procedures for installa-

tion and field testing of J-frame Series C circuit break-

ers. For this publication, the term circuit breaker shall

also include the molded case switch.

2. INSTALLATION

The installation procedure consists of inspecting the cir-

cuit breaker and, as applicable, installing the trip unit,

accessories, interphase barriers and terminals; mount-

ing the circuit breaker; connecting the line and load con-

ductors; torquing terminals; and attaching terminal

shields. Circuit breaker frames, trip units, accessories,

mounting hardware, and unmounted terminals may be

supplied in separate packages. To install the circuit

breaker, perform the following steps.

JDB circuit breakers are factory sealed for reverse

feed applications under UL489. UL requires that

internal accessories be installed at the factory in

this type of circuit breaker.

For hardware conversion kits and handle mechanisms

required to replace existing Cutler-Hammer circuit

breakers.

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 accesso-

ry instruction leaflets.

Circuit breaker mounting hardware is supplied separate-

ly.

2-1. Make sure that the circuit breaker frame is suitable

for the intended installation by comparing nameplate

data with existing ratings and system requirements.

Inspect the circuit breaker for completeness, and check

for damage before mounting. Uninstalled cover mount-

ing hardware is supplied in a plastic bag with the circuit

breaker frame. (See Figure 2-1)

2-2. Remove installed cover screws and cover.

Figure 2-1 Cover Mounting Hardware

Pan Head Screws

Thread-Forming Screws

Figure 2-2 Cover Screw Installation Positions

Screw, .190-32 x 3.13 Inch, Pan Head, Cross-Recessed.

Screw, No. 8 x 1.88 Inch, Pan Head, Cross-Recessed,

Thread Forming.

Screw, No. 6 x 1.50 Inch, Pan Head, Cross-Recessed,

Thread Forming (used with 4 Pole Only)

Note: Hatched lines show additional pole and screws for

4-pole circuit breaker.

On/

Off/

NOTICE

I.L. 29C103G

Effective 1/10

The circuit breaker handle must be in the tripped or

OFF position to remove the cover. Instructions for

installing the trip unit accessories are supplied with

the devices.

2-3. If not already installed, mount trip unit and acces-

sories (if required) in circuit breaker frame.

WHEN 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. Install cover, and secure with pan-head screws fol-

lowed by threadforming screws, as shown in Figure 2-2.

2-5. If not already installed, mount terminals as shown

in Figure 2-3. When using terminal (Catalog No.

TA250KB), secure the terminal to the circuit breaker

using a 1/8-inch socket wrench and torque to 6-8 lb.-ft

(8-11 N.m). After mounting the circuit breaker and

before installation of the conductors, the terminal mount-

ing screw can be checked or retightened through the

terminal when the conductor screw is removed. When

using terminal (Catalog No. T250KB), secure the termi-

nal to the circuit breaker using screw and nut. Torque to

7-9 lb.-in (0.8-1.0 N.m).

THE VOLTAGES IN ENERGIZED EQUIPMENT CAN

CAUSE DEATH OR SEVERE PERSONAL INJURY.

BEFORE MOUNTING THE CIRCUIT BREAKER IN AN

ELECTRICAL SYSTEM, MAKE SURE THERE IS NO

VOLTAGE PRESENT WHERE WORK IS TO BE PER-

FORMED. SPECIAL ATTENTION SHOULD BE PAID

TO REVERSE FEED APPLICATIONS TO ENSURE

NO VOLTAGE IS PRESENT.

Depending on the equipment configuration, the cir-

cuit breaker can be mounted using different styles

of hardware. The following steps describe how to

mount the circuit breaker using standard hardware.

When special hardware is needed (for example, with

the electrical operator), the instruction leaflet

describing the accessory also describes the special

mounting arrangements.

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 Figure 2-4. For panel-

board mounting, only load end support mounting

holes are required. For deadfront cover applications,

cut out cover to correct escutcheon dimensions. (See

Figure 2-5)

b. If circuit breaker includes factory- or field-installed

internal accessories, make sure that accessory

wiring can be reached when the circuit breaker is

mounted.

Labels with accessory connection schematic dia-

grams 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.

Figure 2-3 Terminal Installation

Terminal

Connectors

Collar

Socket

Screw

TA250KB Terminal

Collar

Nut

T250KB Terminal

Flat-Head

Screw

NOTICE

CAUTION

WARNING

NOTICE

Page 3

Torque cover screws to 18-23 lb-in (2-2.6 N.m.).

I.L. 29C103G

Page 4

Effective 1/10

c. Position circuit breaker on mounting surface.

d. Install circuit breaker mounting screws and washers.

Tighten screws firmly, but do not exceed 28 pound-

inches (3 N.m.).

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.

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 hardware and terminal connecting hardware

for correct torque loading. Torque values for line/load

terminals are given in Table 2-1 and on the circuit

breaker nameplate.

3. MANUAL OPERATION, AND THERMAL-

MAGNETIC ADJUSTMENT

Manual Operation

Manual operation of the circuit breaker is controlled by

the circuit breaker handle and the PUSH-TO-TRIP but-

ton in the trip unit. The circuit 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 posi-

tion: red for ON, white for tripped, and green for OFF.

ON/OFF is also shown with the international symbols

1/0. (See Figure 3-1)

Circuit Breaker Reset

After an automatic or accessory initiated trip, or a manu-

al Push-to-Trip operation, the circuit breaker is reset by

moving the circuit breaker handle to the extreme OFF

position.

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.

Figure 2-5 Circuit Breaker Escutcheon Dimensions

.344R

(8.74)

1.562

(39.67)

.781

(19.84)

2.922

(74.22)

3.938

(100.02)

.875

(22.22)

.781

.188R

(4.77)

3.50

(88.90)

Circuit Breaker Handle

CAUTION

NOTICE

Figure 2-4 Circuit Breaker Mounting Bolt Drilling Plans

2, 3 Pole Breakers

4-Pole Breakers

1.375

(34.37)

.688

(14.47)

2.750

(69.85)

1.375

(34.37)

4.078

(103.58)

7.250

(184.15)

.250-20

(M6-1.0)

Tap

(4 Holes)

.250-20

(M6-1.0)

Tap

(6 Holes)

Circuit Breaker

Handle

Circuit Breaker Handle

I.L. 29C103G

Eective 1/10

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 function 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.

Thermal-Magnetic Trip Unit Adjustment

The magnetic element of each pole of the trip unit can

be adjusted by rotating the adjustment buttons on the

front face of the trip unit with a screwdriver. The buttons

have several settings, as indicated on the nameplate,

with values in multiples of the trip unit ampere rating (I

(See Figure 3-2) To adjust the setting, rotate each but-

ton clockwise until arrow on button points to desired set-

ting.

4. INSPECTION AND FIELD TESTING

Series C molded case circuit breakers are designed to

provide years of almost maintenance-free operation.

The following procedure describes how to inspect and

test a circuit breaker in service.

Inspection

Circuit breakers in service should be inspected periodi-

cally. The inspection should include the following checks

(4-1 through 4-8):

THE VOLTAGES IN ENERGIZED EQUIPMENT CAN

CAUSE DEATH OR SEVERE PERSONAL INJURY.

BEFORE INSPECTING THE CIRCUIT BREAKER IN

AN ELECTRICAL SYSTEM, MAKE SURE THERE IS

NO VOLTAGE PRESENT WHERE WORK IS TO BE

PERFORMED. SPECIAL ATTENTION SHOULD BE

PAID TO REVERSE FEED APPLICATIONS TO

ENSURE NO VOLTAGE IS PRESENT.

WARNING

Table 2-1 Terminal Types

Terminal Terminal Screw AWG Metric Wire Torque

Cat. No. Material Head Wire Wire Type Value

Body Type Range Range lb-in

(N.m.)

T250KB Stainless Socket 4-350 MCM 25-185 Cu Only 180 (20)

Steel

TA250KB Aluminum Socket 4-350 MCM 25-185 Cu/AI 275 (31)

Figure 3-1 Circuit Breaker Manual Controls

TRIP

OFF

(Reset)

International

Symbols

OFF

Push-To-Trip

Button

Thermal-Magnetic

Trip Unit Adjustment

Button (3 Places)

Handle Position Indicator Color

Red – ON

White – TRIP

Green – OFF (Reset)

On/

Off/

Figure 3-2 Trip Unit Magnetic Trip Adjustment Buttons

Adjustment

Buttons

Page 5

I.L. 29C103G

Page 6

Effective 1/10

MAKE SURE THAT CLEANING AGENTS OR SOL-

VENTS USED TO CLEAN THE CIRCUIT BREAKER

ARE SUITABLE FOR THE JOB. SOME COMMER-

CIAL CLEANING AGENTS WILL DAMAGE THE

NAMEPLATES OR MOLDED PARTS.

4-1. Remove dust, dirt, soot, grease, or moisture from

the surface of the circuit breaker using a lint-free dry

cloth, brush, or vacuum cleaner. Do not blow debris into

circuit breaker. If contamination is found, look for the

source and eliminate the problem.

4-2. Switch circuit breaker to ON and OFF several

times to be sure that the mechanical linkages are free

and do not bind. If mechanical linkages are not free,

replace circuit breaker.

4-3. With the circuit breaker in the ON position, press

the PUSH TO-TRIP button to mechanically trip the cir-

cuit breaker. Trip, reset, and switch circuit breaker ON

several times. If mechanism does not reset each time

the circuit breaker is tripped, replace the circuit breaker.

4-4. Check base, cover, and operating handle for

cracks, chipping, and discoloration. Circuit breakers

should be replaced if cracks or severe discoloration is

found.

4-5. Check terminals and connectors for looseness or

signs of overheating. Overheating will show as discol-

oration, melting, or blistering of conductor insulation, or

as pitting or melting of conductor surfaces due to arcing.

If there is no evidence of overheating or looseness, do

not disturb or tighten the connections. If there is evi-

dence of overheating, terminations should be cleaned or

replaced. Before reenergizing the circuit breaker, all ter-

minations and cable should be refurbished to the condi-

tion when originally installed.

4-6. Check circuit breaker mounting hardware, Tighten

if necessary.

4-7. Check area where circuit breaker is installed for

any safety hazards, including personal safety and fire

hazards. Exposure to certain types of chemicals can

cause deterioration of electrical connections.

4-8. The operation of circuit breakers with electronic trip

units can be field-tested periodically using the Seltronic

test kit.

Field Testing

Any field testing should be done in accordance with

applicable NEMA Standard.

CAUTION

I.L. 29C103G

Effective 1/10

Page 7

Style 6632C43H08

Printed in U.S.A.

/TQC

I.L. 29C103G

Page 8

Eaton Electrical, Inc.

1000 Cherrington parkway

Moon Township, PA 15108-4312

USA

Tel: 1-800-525-2000

www.EatonElectrical.com

Printed USA/TQC

Eective January 2010

Eaton JDB Installation Instructions Manual

Marca: Eaton

Modello: JDB

Tipo: Installation Instructions Manual

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