Rockwell Automation Allen-Bradley 140U User manual

Installation Instructions for I-Frame Molded Case
Circuit Breakers and Molded Case Switches
WARNING
DO NOT ATTEMPT TO INSTALL OR PERFORM
GIZED. DEATH, SEVERE PERSONAL INJURY OR
SUBSTANTIALPROPERTY 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.
MAINTENANCE ON EQUIPMENT WHILE IT IS ENER -
ALLEN-BRADLEY
IS NOT LIABLE FOR THE
MISAPPLICATION OR MISINSTALLATION OF ITS
PRODUCTS.
The user iscautionedto observe all recommendations,
warnings andcautionsrelating to the safety of
personnel
andequipment, as well as all general and local health
andsafety laws,codes, andprocedures.
The recommendationsand informationcontained herein
are basedon Allen-Bradleyexperienceandjudgment,
but shouldnot beconsidered to be all-inclusive
or
coveringeveryapplication or circumstancewhich may
arise.
If any questionsarise, contact Allen-Bradley for
further information
or instructions.
1, INTRODUCTION
Fig, 7-1. I-Frame Circuit Breaker and
Molded Case Switches
The 140U-I-Frame circuit breakers (Fig. 1-1)
are ratedfrom 15Ato 225A continuous
currentand are available as thermal
- magnetic
circuit breakers and moldedcase switches.
Circuit breakers are listedin accordancewith
Underwriters Laboratories, Inc. Standard UL489,
andsatisfythe (P1) requirements of the
International ElectrotechnicalCommission
Recommen
dation No. IEC 157-1.
Moldedcase
switches
are listedin accordance with UL1087.
For this publication, the term circuit breaker
also
2. INSTALLATION
The installationprocedureconsists of inspecting and
mountingthecircuit breaker, connecting andtorquing the
lineand loadterminations, andattaching terminalshields
or barriers,when supplied.
To installthe circuit breaker,
perform
the following steps:
Note:
The I-Frame circuit breakersare factory sealed. UL489
requires that internalaccessories be installedat the
factory. Where localcodes and standards permit and
UL listing is not required, internalaccessories can be
field installed. Accessory installationshould be done
before the circuit breaker is mountedand connected.
Mountinghardware and unmountedterminations (where
required) aresuppliedinseparate packages.
2 - 1. Make sure that thecircuit breaker is suitablefor the
installation
by comparing nameplate data with system
requirements. Inspectthe circuit breakerfor completeness
BEFORE
MOUNTING THE CIRCUIT BREAKER IN AN
ELECTRICALSYSTEM, MAKESURETHERE IS NO
VOLTAGE PRESENTWHERE WORK IS TO BE PER -
FORMED. THEVOLTAGES IN ENERGIZED EQUIP -
MENT CAN CAUSE INJURY OR DEATH.
Bul. 140U
includes molded case switches.
.
40752-162(1) Effective 7/07
and check for damage before mounting.

2 - 2. Dependingon theequipment configuration, the
circuit breakercan be mounted usingdifferent styles
of
hardware. The following steps describe how to mount
the circuit breakerusingstandard hardware. When
special hardwareisneeded (for example,with the
electricaloperator), the instruction leafletdescribingthe
accessory
also describesthespecial mounting
arrangements.
Note: Beforemountingthe circuit breaker, check if the
termination devicesshould be installedfirst. See termi
-
nationsinstructions.
2 - 3. To mountthe circuit breaker,performthefollowing
steps:
a. For individual mountingpanels, make sure that
mountingpanelis predrilled using boltdrilling plan
(Fig.
2 - 1).
Fordeadfront cover applications
make sure panelcover iscut out to
correct escutcheondimensions (Fig. 2-2)
).
T 2913
158.751
I
'
,188 (478 mm) Dia. Hde for
Access to Push - to-Trip
Fig. 2 - 2. Circuit Breaker Escutcheon Dimensions
2 - 4. If anoptional terminal endcover isto beinstalled
with thecircuit breaker (usually line end only), it must be
positionedbeforecable is connectedtoterminals.
b. If circuit breakerincludesfactory installedinternal
accessories, makesure accessorywiring can be
reachedwhen the circuit breaker is mounted.
c. Positioncircuit breaker on mountingsurface.
d. Installmountingscrews, washers, and nuts.Tighten
screws firmly, but do not exceed
28 pound - inches
(3.16 N.m.).
N.m.).
3 Poles 4 Poles
.164-32Tap Holes
(M4 x .07)
WHEN ALUMINUM CONDUCTORSARE USED, THE
APPLICATION OF A SUITABLE JOINT COMPOUND IS
RECOMMENDED TO REDUCE THE POSSIBILITY OF
TERMINALOVERHEATING.TERMINALOVERHEATING
CAN CAUSE NUISANCE TRIPPING AND DAMAGE TO
THE CIRCUIT BREAKER.
2 - 5. After mountingthecircuit breaker, line and load
terminals andaccessory leads should be connected.
(See accessoryschematic diagram on side of circuit
breaker.
)
Note: If terminalshield or interphase barriersare to be
installedon the circuit breaker,installthem afterthe
terminals are connected.
2 - 6. If required, installterminalshieldon circuit breaker
coverwith mountingscrews provided.
2 - 7. If required, installan interphase barrier by sliding
barrierintodovetail grooves betweenterminals.
2 - 8. After the circuit breakeris installed, check all
mounting hardwareand terminalconnectinghardware
for correct torque loading.
Torque values for line/load
terminals are given inTables
2 - 1 and 2 - 2 andon the
circuit breakernameplate.
Fig, 2 - 1. Circuit Breaker Mounting Bolt Drilling Plans
40752-162(1)
Effective 7/07
CAUTION

Page
3
Note: Inthe event of athermaltrip, the circuit breaker
cannot be reset untilthe thermal element cools.
Handle Positon
lrdiator Galor:
Fig. 3 - I. Circuit Breaker Manual Controls
3. MANUAL OPERATION
Manualoperationof the circuitbreaker is controlled by
thecircuitbreaker handle and the PUSH-TO-TRIP
button.The circuit broakerhandle
has three indicated
positions,
two of which are shown on the cwerwith
raisedletteringto indicate
ON and OFF. On the sliding
handle barrier,
ON, OFF, and trip are also shown by a
color-codedstripfor each circuit breaker handleposition:
redfor
ON, white for tripped, and green for OFF. On the
sliding handle barrier, ON/OFF is
also shownwiththe
internationalsymbols 1/0
(See Fig. 3 - 1 .)
CIRCUIT BREAKER RESET
After tripping,the circuit breaker is reset by moving the
circuit breakerhandle to the extreme OFF position.
PUSH - TO - TRIP BUTTON
The PUSH - TO - TRIP buttonchecks thetrippingfunction
andisusedto periodicallyexercisethe operating
mechanism.
4. INSPECTIONAND FIELDTESTING
140U moldedcase circuit breakers are designedto
provideyears of
almost maintenance-freeoperation. The
following proceduredescribeshowto inspect and test
a
circuit breaker insewice.
INSPECTION
Circuit breakers i n service should be Inspected periodi-
cally. The inspectionshould includethefollowingchecks
4 - 1 thru4 - 7.
~~
BEFORE INSPECTING THE CIRCUIT BREAKER IN AN
ELECTRICALSYSTEM, MAKE SURE THE CIRCUIT
BREAKER IS SWITCHED
TO THE OFF POSITIONAND
THERE IS NO VOLTAGE PRESENT WHERE WORK IS
TO BE PERFORMED. SPECIAL ATTENTION SHOULD
BE PAID TO REVERSE FEED APPLICATIONS TO
ENSURE NOVOLTAGE IS PRESENT. THE VOLTAGES
IN ENERGIZED
EQUIPMENT CAN CAUSE INJURY OR
DEATH.
A CAUTION
MAKESURETHAT CLEANING AGENTS OR SOL -
VENTS USED TO CLEAN THE CIRCUIT BREAKER ARE
SUITABLE
FOR THE JOB. SOME COMMERCIAL
PLATESOR MOLDED PARTS.
CLEANING AGENTS WILL DAMAGE THE NAME -
4 - 1. Removedust, dirt, soot, grease, or moisturefrom
the surface
of the circuit breakerusing a lint-freedry
cloth, brush, or vacuum cleaner. Do not blowdebris into
circuit
breaker. If contamination is found, lookfor the
source and eliminatethe problem.
4 - 2. Switchcircuit breakerto ON and OFF severaltimes
to be
sure that the mechanicallinkagesarefree and do
not bind.
If mechanicallinkagesare not free, replace
circuit breaker.
40752-162(1) Effective 7/07

Page 4
4-3. Pressthe PUSH-TO-TRIPbutton to mechanically
tripthe circuit breaker.Trip, reset, and switch circuit
breaker
ON severaltimes. If mechanism does not reset
each time the circuit breaker istripped, replacethe circuit
breaker.
44. Check base,cover, andoperatinghandle for cracks,
chipping, and discoloration.Circuit breakers should be
replaced
if cracksor severediscoloration is found.
4-5. Checkterminals and connectorsfor loosenessor
signs of overheating. Overheatingwill show as discolora -
tion, melting, or blistering of conductorinsulation, or as
pitting or melting of conductorsurfacesdue to arcing. If
there is no evidence of overheating or looseness, do not
disturb
or tightenthe connections. If there is evidence of
overheating,terminationsshould
be cleaned or replaced.
Before re
- energizingthe circuit breaker, all terminations
and cable should be refurbished to the conditionwhen
originallyinstalled.
4-6. Checkcircuit breaker mounting hardware. Tighten if
necessary.
4-7. Checkareawhere circuit breaker is installedfor any
safety hazards, including personal safetyandfire
hazards. Exposure
to certain types of chemicalscan
cause deterioration
of electricalconnections.
FIELD TESTING
Any field testingshouldbe done inaccordancewith
NEMA Standards Publication AB2 - 1984.
40752-162(1) Effective 7/07
Printed in USA