Eaton JDB Installation Instructions Manual

Installation Instructions for JDB, JD, HJD, JDC, JW HJW,
JWC Circuit Breakers and Molded Case Switches
!
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
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-
Table 1-1 Available Trip Unit Ratings
Circuit Breaker Trip Unit Types
Types Thermal-Magnetic Amperes I
Fixed
Thermal
JDB 70
JD 90
HJD 100
JDC JW 125
HJW 150
JWC
175
200
225
250
Not UL listed.
1
For adjustable thermal trip units, the magnetic setting is a multiple
2
of the maximum thermal setting.
I.L. 29C103G
n
Adjustable Adjustable
Thermal Magnetic
1
of I
2
n
5 to 10
100-125
125-160
160-200
200-250