Instalacion Operacion y Mantenimiento Motores Large AC

8/15/2019 Instalacion Operacion y Mantenimiento Motores Large AC

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Installation, Operationand Maintenance of

Large AC Motors

6800 Frame

Instruction Manual B – B-3741-1January 2007

Horizontal FootlessMounting. Water Cooled

Explosion Proof Mining Moto


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1

SECTION 1: GENERAL DESCRIPTION

INTRODUCTION

DANGER HIGH VOLTAGE AND ROTATING PARTS CAN

CAUSE SERIOUS OR FATAL INJURY. THE USEOF ELECTRIC MACHINERY, LIKE ALL OTHERUTILIZATION OF CONCENTRATED POWER ANDROTATING EQUIPMENT, CAN BE HAZARDOUS.INSTALLATION, OPERATION, ANDMAINTENANCE OF ELECTRIC MACHINERYSHOULD BE PERFORMED BY QUALIFIEDPERSONNEL. FAMILIARIZATION WITH NEMAMG2 SAFETY STANDARD FOR CONSTRUCTIONAND GUIDE FOR SELECTION, INSTALLATIONAND USE OF INTEGRAL HP MOTORS,NATIONAL ELECTRICAL CODE AND SOUNDLOCAL PRACTICES IS RECOMMENDED.

IMPORTANT

The motor shaft must be blocked to prevent axialmovement whenever the motor is moved

THE PRODUCTS DESCRIBED IN THISINSTRUCTION MANUAL ARE MANUFACTUREDBY RELIANCE ELECTRIC COMPANY.

These instructions do not cover all details or

variations in equipment nor provide everypossible contingency or hazard to be met inconnection with installation, operation andmaintenance. Should further information bedesired or should particular problems arisewhich are not covered within this manual, thematter should be referred to Reliance ElectricIndustrial Company.

roduction machinery.

detectors

Special conduit boxes

doroughly before unpacking and installing

Reliance® 6800 Frame Motors are designedand built to provide you with a drive powersystem composed of matched components.

Such a system is capable of delivering thehorsepower, torque, speed and power effi-ciency characteristics that are needed forreliable p

This systems approach was used not only inthe design of the motor, but also in the state-of-the-art manufacturing used to produce and testthese rugged and dependable machines. It ex-tends from the major assemblies such as ro-

tors, stators, enclosures and insulation sys-tems, to the smallest component...carefully se-lected and mated for optimum performance.The result is a product that is indeed, more thana motor... more like a system.

Reliance 6800 Frame Motors are designed foreasy disassembly, re-assembly, and inspection.These common accessories are available:

• Bearing temperature detectors

• Winding temperature

• Vibration monitors

•

This manual contains the information that you

need to get the most out of your Reliance 680Frame Motor. Please read it carefully anthmotor.

RECEIVING AND ACCEPTING

Warnin EYEBOLTS OR LIFTING LUGS ARE INTENDEDFOR LIFTING THE MOTOR ONLY WITH THESTANDARD ACCESSORIES SUCH ASTACHOMETER, ETC., MOUNTED BY RELIANCE

ELECTRIC. THE LIFTING MEANS ON THEMOTOR MUST NOT BE USED TO LIFT THEMOTOR PLUS ADDITIONAL EQUIPMENT SUCHAS GEARS, PUMPS, COMPRESSORS, OROTHER DRIVEN EQUIPMENT. THE LIFTNGMEANS ON THE MOTOR CANNOT BE USED TO

IFT ASSEMBLIES OF MOTOR AND OTHERLEQUIPMENT MOUNTED ON A COMMON BASE.

In all cases, care should be taken to assurelifting in the direction intended in the design ofthe lifting means. Lift using all lugs provided.Likewise, precautions should be taken toprevent hazardous overloads due todeceleration, acceleration or shock forces.

ngle of lift with rope or chain should never be Aless than 45 degrees from the horizontal.

Upon receipt, thoroughly inspect the wrapping

and crate for any sign of damage. If any dam-

age is evident, do not accept the motor until

the freight or express agent makes an ap-


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2

If any concealed loss or dam-ge is discovered later, notify your freight or

t at once and request him to maken inspection.

se. If the motorto be stored for a period of any time prior to

propriate notation on your freight bill or ex-

press receipt.aexpress agena

STORAGE

Do not unpack until ready for uisinstallation, it should be placed in an areawhich is clean, dry and warm.

Caution Sleeveb

bearing motors are shipped without oil. Fillearing reservoirs to the proper level before rotating

the shaft. Failure to observe this precaution couldresult in damage to or destruction of the equipment.

The motor should be inspected periodically andthe insulation resistance checked and recordedmonthly. If there is a significant change in

preventing bearing corrosion due to

ousing(s) and bearing(s) inspected fororrosion. If corrosion is present, the bearing(s)ust be replaced. If there is no corrosion, re-

ack the bearing(s) / housing(s) with grease asstructed in Section 4 under “Bearing Lubrica-

tion”.

andled and treated per the requirements ofReliance Service Bulletin B-8018-2 availablefrom your Reliance District Sales Office.

insulation resistance, it should be investigatedand corrective action should be taken. Consultyour local Reliance Sales Office for additionaldata.

Reliance 6800 anti-friction bearing motors areshipped with the proper amount of grease ineach bearing.

At 30 day intervals of storage, remove onlyenough packing to expose the shaft and re-move the shaft shipping brace, rotate the shaft(by hand) 10 to 15 revolutions. This distributes

e grease,thcondensation, or to the presence ofcontaminating gases near the motor. Afterrotating the shaft replace protective packingand shaft shipping brace.

If the motor is stored and directly exposed toweather conditions, it is important that the bear-ing grease be inspected for the presence of wa-ter at the grease drain. If the grease is con-taminated with water, the motor must be disas-sembled, grease removed from the bearing(s)and hcmpin

otors subject to extended storage must beMh


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3

SECTION 2: INSTALLATION

INSTALLATION

Warnin INSTALLATION SHOULD BE IN ACCORDANCE

WITH THE NATIONAL ELECTRIC CODE ANDCONSISTENT WITH ALL LOCAL CODES.

COUPLING, BELT, AND CHAIN GUARDSSHOULD BE INSTALLED AS NEEDED TOPROTECT AGAINST ACCIDENTAL CONTACTWITH MOVING PARTS. MACHINESACCESSIBLE TO THE PUBLIC SHOULD BEFURTHER GUARDED BY SCREENING, GUARDRAILS, ETC., TO PREVENT PERSONNEL FROMCOMING IN CONTACT WITH THE EQUIPMENT.

The assurance of successful startup depends

upon the use of good handling, inspection, andinstallation practices. The motor should bemounted with adequate stiffness and mass tomaintain system resonant frequencies removedfrom excitation frequencies by 15%. The needfor closer alignment and heavier bases be-comes more critical with higher speed operationand large motors.

HANDLING

packing. Use a hoist withdequate capa

Carefully remove the motor from packaging.Lifting provisions are provided as eyebolts ontop of the motor. Place a lifting hook in each ofthe lifting means provided and carefully lift themotor from itsa city.

Warnin LIFTING MEANS ARE PROVIDED FOR HANDLINGTHE MOTOR, AND SHOULD NOT BE USED TOLIFT THE MOTOR PLUS ADDITIONAL

EQUIPMENT SUCH AS GEARS, PUMPS,COMPRESSORS, OR OTHER DRIVENEQUIPMENT. IN THE CASE OF ASSEMBLIES ONA COMMON BASE, ANY LIFTING MEANSPROVIDED ON THE MOTOR OR GENERATORSHOULD NOT BE USED TO LIFT THE ASSEMBLYAND BASE BUT, RATHER, THE ASSEMBLYSHOULD BE LIFTED BY A SLING AROUND THEBASE OR BY OTHER LIFTING MEANS PROVIDEDON THE BASE. IN ALL CASES CARE SHOULDBE TAKEN TO ASSURE LIFTING IN THE

DIRECTION INTENDED IN THE DESIGN OF THELIFTING MEANS. LIKEWISE, PRECAUTIONSSHOULD BE TAKEN TO PREVENT HAZARDOUSOVER LOADS DUE TO DECELERATION,ACCELERATION OR SHOCK FORCES.

bearings.

”).

2.

ction 4 under “Checking

3.o

er factor and current

. Check to make sure that direction of motor

ion and motor requirement.

haft blocking before energizingmotor.

Should additional handling or shipment ofmotors be required, be certain to block the shaftas it was blocked at the Reliance Factory.Blocking the shaft limits the rotor movementboth axially and radially which preventsdamage to the

INSPECTION

Before installing the motor, make the followingchecks:

1. Inspect for any damage resulting fromshipment. Refer to paragraphs on receivingand storage. (Refer to Section 1 under“Receiving and Accepting” and “Storage

If the motor has been in storage for anextended period or had been subjected toadverse moisture conditions, check theinsulation resistance of the stator winding.(Refer to Se

Insulation Resistance”).

Examine the motor nameplate data tomake sure it agrees with the power circuit twhich it will be connected. The motor isguaranteed to operate successfully at linefrequency not more than 5%, and linevoltage not more than 10%, above or belowthe nameplate ratings, or a combinedvariation of voltage and frequency of notmore than 10% above or below nameplateratings. Efficiency, pow

may vary from nameplate data.

4rotation is correct for the intendedapplicat

5. Remove s


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erwriter’s regulations. Thellowing additional considerations should also

inery. Thecation of installation should be accessible for

nent handling equipment to facilitateand repair without complete

f the individual units should be

own on thethe motor

. Before shipment, every Relianceotor is given a running test to check

ce due to theontact lip seals used within this design. The

uracy required in the alignmentepends on the rated speed of the machine.

ac

CO

. In preparation for making the coupling

should be heatedfor proper mounting. Do not press or drive

of

efer to accepted procedures for coupling

ing limits:

AXIMUM PARALLEL

Erade #8, 1.00 inch ( ISO Class 8.8, M24)rqued to 125 +25/-00 lb-ft (170 +34/-00

LOCATION

The motor must be located in an environmentthat satisfies local codes and National Board ofFire and Undfogovern its location.

Exposure to high ambient temperatures,humidity and atmospheric contamination shouldbe avoided. Acids, alkalis and gases also havedetrimental effects on electrical machloroutine maintenance and inspection.

ermaPmajor servicedisassembly o

considered.

MOUNTING

The dimensions for mounting are shutline drawing supplied witho

software and should be referred to.

PRE-INSTALLATION CHECKS

Before operating, the motor should be checkedfor any changes resulting from improper

handling during shipment, storage, installationor by an unsatisfactory foundation. Failure tocheck or do the necessary work as mentionedabove could cause misalignment resulting invibrationmoperation. Although complete factory tests havebeen made, motors should be verified toprevent premature bearing failure.

Before the motor is checked for alignment,

remove all shipping blocks and supportsinstalled at the factory. The shaft should turnover freely with minor resistancdegree of accdThe greater the speed, the greater the care and

curacy necessary for proper alignment.

UPLING

1alignment, wash off the rust-protectivecoating on the motor shaft with solvent. Anyfactory-installed couplings should also becleaned with solvent prior to installation on

the shaft.

2. Cylindrical bore couplings

this type of coupling onto the shaft. Taperedbored couplings should be installed per thecoupling manufacturer’s recommendations.

COUPLING ALIGNMENT

here are a number of different procedures inT

alignment of the motor to the driven equipment.The end result depends upon the accuracythe parts in roundness, flatness, runout of thereference surfaces, rigidity of the mountingplatform, and the skill of the set-up-person. Themotor mounting surface must be flat andperpendicular to the shaft axis.

COUPLING ALIGNMENT PROCEDURE

Ralignment such as double-dial indicator orlaser alignment. Coupling alignment shallbe within the follow MAXIMUM PERMISSIBLE ANGULARMISALIGNMENT = .001 inch per inch ofcoupling hub diameter.

M PERMISSIBLEMISALIGNMENT = .002 inch TIR (Total In-dicated Runout).

The motor mounting bolts should be SAGtoNm).

Caution Do not use the coupling to compensate for pooralignment. This can result in vibration, noise, cou-


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ling wear, overloaded bearings and early failure.p

LUBRICATION

NOTE: The lubrication system should bechecked in preparation for rotating the shaftduring the alignment operation

ANTI-FRICITON BEARINGS – GREASE

UBRICATED

earing chambers are packed with greasenormally need

installation

L Bduring assembly, and do notadditional grease at the time ofunless the unit has been in storage for 6months or longer. If the motor has been kept inextended storage, lubricant must be added per

Section 4, Table II.

ELECTRICAL CONNECTION

DANGER

THE USER IS RESPONSIBLE FORCONFORMING WITH THE NATIONAL ELECTRICCODE AND ALL OTHER APPLICABLE LOCCODES. WIRING PRACTICES, GROUNDINGDISCONNECTS AND OVERCURRPROTECTION ARE OF PARTICULIMPORTANCE. FAILURE TO OBSERVE THE

PRECAUTIONS COULD RESULT IN SEVEREODILY INJURY OR LOSS OF LIFE.

AL

ENTARSE

B

The motor is provided with a quick disconnectsocket or other suitable means for connectionto the power source. Typically the customerprovides the matgland parts. The

ing plug or approved packingcustomer side power and

round cable should be sized in accordance

and mine aut

main terminal box may be provided for power

gwith the given countries applicable electrical

horities electric code.

Alines to the stator. Other terminal boxes for allother electrical connections may be provided.

GROUNDING

Warning

Failure to properly ground the motor could causesevere bodily injury or loss of life.

All large motors should be grounded with therounding conductor equipped with a brazed

copper terminal, or with a suitable solderlessterminal fastened to the motor. Soldered

terminals should not be used. A washer shouldbe used between bolt head and terminal lug.The other end should be fastened with suitableclamps or terminals to rigid metallic conduit orto the nearest available ground. Groundingconductor size should be in accordance withthe following National Electrical Code.

g


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SECTION 3: OPERATION

PRE-OPERATION CHECK

Caution THIS EQUIPMENT IS AT LINE VOLTAGE WHEN

A-C POWER IS CONNECTED. DISCONNECTAND LOCKOUT ALL UNGROUNDEDCONDUCTORS OF THE AC POWER LINEBEFORE PROCEEDING. FAILURE TO OBSERVETHESE PRECAUTIONS COULD RESULT INSEVERE BODILY INJURY OR LOSS OF LIFE.

Before starting the motor for the first time thefollowing checks must be made:

1. Hold-down bolts must be tightened to 125+25/-00 lb-ft (170 +34/-00 Nm).

2. If the motor has been idle for a long periodof time after installation, check theinsulation resistance. Refer to Section 4under “Checking Insulation Resistance”

3. Check the incoming power to be sure that linevoltage, frequency and phase are correct for themotor (refer to the motor nameplate).

4. Inspect all electrical connections for correcttermination, clearance, mechanical strength,and electrical continuity.

5. Check to be sure that the shipping bracehas been removed from the motor shaft.

7. Manually turn the shaft to make sure that itrotates freely.

Caution When the driven equipment is likely to be damagedby the wrong direction of rotation, it is best to un-couple the motor from its load during the check for

tation and/or during the initial start.ro Some motors are designed for a single direction of rotationas indicated by nameplates. Running those units in thewrong direction will reduce airflow causing overheating.Check to see that both the motor and driven equipmentare operating in the correct direction of rotation. If it is nec-essary to change rotation, disconnect and lockout all inputpower and interchange any two input power phases.

8. Replace all panels and covers.

9. Check direction of rotation by momentarilyapplying power to the motor.

INITIAL START

Caution Read and fully understand each of the steps in thefollowing procedure before attempting to start themotor.

1. When alignment is correct and motor isproperly lubricated, prepare for no loaduncoupled startup. The coupling should beuncoupled and a solo plate should beinstalled if required.

tions.

ural

5. that the protectivecontrols are functioning properly before any

. Run the motor for at least two hours if no

2. Inspect the motor carefully. Make the initialstart by following the regular sequence ofstarting operations in the controlinstruc

3. After starting, check that the motor isrunning smoothly and with the proper di-rection of rotation. If the motor showsexcessive vibration, shut down immediatelyand investigate. Check for coupling and key

unbalance, lack of lubrication, and struct resonance.

4. If bearing temperature detectors are pro-vided, check the temperatures frequentlyduring the initial hour of operation. At initialstart, the bearing temperature rate of risewill be high. This rate of rise shoulddecrease within 30 minutes. If this rate ofrise does not decrease or the temperatureexceeds 130°C, stop the motor.

Check to make sure

prolonged operation.

6problems are encountered.

Warning


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CE BEFOREROCEEDING. FAILURE TO OBSERVE THESE

TO INSURE THAT THE MOTORS ARE NOTUNEXPECTEDLY STARTED, TURN OFF ANDLOCK OUT OR TAG POWER SOURPPRECAUTIONS COULD RESULT IN SEVEREBODILY INJURY OR LOSS OF LIFE.

After this initial start and no load run has been

completed, assemble and lubricate the couplingith the manufacturer’s recommended

ction of this manual. Check to seeat the driven equipment is not transmitting

tor through the couplingr the base.

VIBRATION LIM

ON BRACKET

wlubricant. Check to see that the coupling is notbinding.

After the coupling has been assembled andlubricated, repeat steps 2 through 6 under theinitial start sethvibration back to the moo

ITS

Condition AMPLITUDE

In/sec

Warning .2

Shutdown .3

The vibration levels listed above are onlyuidelines.

TEMPERATURE LIMITS

Condition Bearing Winging

RTD

g

RTD

°C °C

Warning 120 125

Shutdown 130 135

The temperature levels listed above are onlyuidelines.

STARTING DUTY

g

(Jogging and Repeated Starts)

Caution Repeated starts and/or jogs can greatly reduce thefe of an induction motor. If it is necessary to re-li

peatedly start or jog a motor, check the applicationwith your local Reliance Electric sales office.

From ambient temperature, the motor is

load operationmperature. For cooling time required before

ting method are those for which theotor was designed. For starting situations not

covered here, consult your local Reliance

Electric Sales Office before proceeding. Referalso to the motor nameplate which may liststarting conditions.

normally capable of making two starts insuccession while coasting to rest betweenthese starts.

The motor is also normally capable of makingone start from its ratedteadditional starts can be made consult your localReliance Electric Sales Office or the motorstarting nameplate if one is provided.

If more starts or less time between starts thandefined above are attempted, severe damageto the motor electrical windings and rotor mayresult.

The starting conditions listed above apply only ifthe inertia of the connected load, the loadtorque during acceleration, the applied voltage,and the star m


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SECTION 4: ROUTINE MAINTENANCE

Warning DO NOT USE SOLVENTS CONTAINING TRI-

CHLOROETHANE TO CLEAN INTERIOR OR

EXTERIOR OF MOTOR. DAMAGE MAYOCCUR TO PAINT AND INSULATION

SYSTEMS.

Warning EXTERNAL SURFACES MAY BE HOT, CARE

SHOULD BE TAKEN WHEN

MAINTENANCING MOTORS THAT HAVE

BEEN RUNNING TO AVOID BURNS.

SCHEDULED MAINTENANCE

Inspections which are important to the properoperation and maintenance of a Reliancemotor, should occur every 3 months or 500operating hours, whichever comes first. Inaddition, the following should always be

bserved.

• ssive axial

• vel (checkweekly on oil-lubricated units).

neglect orutine inspection and maintenance.

o

• Provide adequate ventilation

Avoid sharp blows and excethrust loads on the output shaft.

Maintain proper lubricant le

Reliance Electric 6800 Frame motors, whenproperly applied, require minimal routinemaintenance. Since clearances and fits areprecisely machined, no periodic mechanicaladjustments are required. Like any precisionmachine, periodic inspection and simple routinemaintenance will prolong your motor’s life andhelp detect potentially damaging conditions.The minimal time spent performing the simpleprocedures below cannot begin to compare with

the cost of lost productivity and time consumingmajor repairs incurred throughro

PERIODIC INSPECTION

Warning DISCONNECT AND LOCKOUT POWER BEFORETOUCHING ANY INTERNAL PART. HIGHVOLTAGE MAY BE PRESENT EVEN WHEN THEMACHINE IS NOT ROTATING. FAILURE TO

BSERVE THIS PRECAUTION COULD RESULTSEVERE BODILY INJURY OR LOSS OF LIFE.

OIN

Every 3 months or 500 operating hours,whichever comes first:

1. Listen for any abnormal noises and check

6.

voltage,

. Comparisons of this data withrevious no load and full load power demandsill give an indication of the performance of theriven machine.

cause immediately.

2. Check for excessive vibration.

3. Check to see that all covers are in placeand secure.

Check for proper lubrication.4.

5. Check bearing temperature rise.

Check voltage and frequency variations.Unbalanced voltage or single-phase op-eration of polyphase motors will causeexcessive heating and ultimately failure.Only a slight unbalance of voltage applied toa polyphase motor will cause largeunbalance currents and result in over-heating. Check power supply totalharmonic distortion to avoid overheating.Periodic checks of phase,frequency, and power consumption of anoperating motor are recommended.

These checks can also provide an excellentindication of the load from the drivenequipmentpwd


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cation) bearings will provideears of uninterrupted service. Use the

nti-Friction Bearing (Grease Lubri-

liance PLS® Positive Lubricationystem which routes new grease directly into

g service

lean the motor prior

BEARING LUBRICATION

The motor is equipped with anti-frictionbearings. When properly cared for, (i.e. in-spection and lubriyfollowing lubrication procedure.

A

cated)

6800 Frame motors are designed with theexclusive ReSthe bearing.

The re-lubrication periods shown in Table II areoffered as a guide for varyinconditions, speeds, bearing types and operating

hours using standard motor grease.

Cleanliness is important in lubrication. Anygrease used to lubricate anti-friction bearingsshould be fresh and free from contamination.Similarly, care should be taken to properlyc grease inlet areas of theto lubricating to prevent grease contamination.

IMPORTANT

Mixing of lubricants must not be done. Lubricantsfrom different manufacturers and of different compo-sitions may not be compatible, resulting in inade-quate lubrication and bearing failure. Do not useautomotive greases, greases with EP additives orgreases other than those specifically listed on themotor lubrication nameplate and this instructionmanual. Failure to follow these instructions may re-sult in lubrication breakdown and bearing failure. If a

bricant other than that listed on the motor name-ual is desired to bece Sales Office for

p

luplate and/or this instruction manused, consult your local Relianap roval prior to its use.

Lubrication Instructions

1 Select Service Conditions from Table I

. Select Lubrication Frequency and rec-ommended volume fill from Table II.

SER

Conditions

ºC (104ºF)

2

TABLE I

VICE CONDITIONS

Eight hours per day, normal or light

loading, clean ambient air at -18°c

(-32° f) TO 40

Standard

SevereConditions

Twenty four hours per day operationor shock loading, vibration, ambientair containing dirt or dust at 40-50ºC(100-120ºF).

Extremeonditions

Heavy shock or vibration, ambientair containing dirt, dust or high hu-midity and temperatures in excess

of 40°C (104°F)

C

RELUBRICATION VALS

TABLE II

INTER

A CTIO GS DNTI FRI N BEARIN EQUIPPE MOTORS

Speed(RPM)

StandardConditions

SevereCondi-tions tions

ExtremeCondi-

3000 &above

6 months 3 months 2 months

Below 30 months00 6 months 3 months 3

ROLLER BEARING EQUIPPED MOTORSBelow 3000 4 months 2 months 1.5 months

RELUBRICA VOLUMEME IN C IC INCHES

TIONVOLU UB

DRIVEMETHOD

3000 & 3600RPM

BELOW 3000RPM

Coupled Duty 3.01.5

Belted Duty ------------ 4.0

Data contained on a lubrication nameplate on the mo-tor takes precedent over this Table

Recommended Lubricant

Refer to the motor Lubrication Nameplate forthe type of lubricant to be used. If there is noLubrication Nameplate on the motor, use a

olyurea base hydrocarbon oil lubricant.

the motorkes precedent over this data. Use only clean,

Lubrication Procedure

p

Note: The Lubrication Nameplate ontafresh grease from clean containers.

Grease


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Reliance anti-friction bearings may be lubri-cated with the motor running or stationary,however, stationary with the motor warm ispreferred.

Warnin IF RE-LUBRICATION IS DONE WHILE THE

MO CLEAR OFOTATING PARTS. FAILURE TO OBSERVE THIS

PREBODILY

TOR IS RUNNING, STAYR

CAUTION COULD RESULT IN SEVEREINJURY OR LOSS OF LIFE.

1. Locgreone

1.

ed grease from the relief plug

area. Remove caked grease from the

sing is warm,permitting free flow of grease through

3. the recommended volume of therecommended lubricant per the motor

and operated grease gun.

4. Start the motor and run with the relief plugop easeshould be purged from the grease drainpipe.

5 nd w ff any ss

BLE

TORQUE VALUE

ate the grease inlet, remove all cakedase and dirt from the fitting. There isgrease inlet per bearing.

Remove relief plug. There is onegrease relief plug per bearing. Removeall harden

grease drain pipe with a screw driver, ifpossible. If severe caking appears inthe grease drain pipe, run the motoruntil the bearing hou

the housing.

Add

Lubrication Nameplate or the above chart

using a h

en for several minutes. Some gr

. Replace plugs a ipe o excegrease.

TA V

FASTENER TORQUE VALUES

FASTENER LB-FT Nm

Flange Mounting 125 170

Bracket Mounting 80 108

Inner Bearing Cap 55 75

Frame Covers 15 20 All torque values have a tolerance of plus 20%

and minus zero.

ANTI-FRICTION BEARING

EPLACEMENT

. For anti-friction bearing motors the inner

2.

4.

6. n now be removed by usinga conventional bearing puller. Locate the

th thebearing puller.

7.

re. This

the inner caps, brackets,grease inlet and drain piping and shaft.Replace all shaft and cap seals.

R

1cap bolts must be removed before removingthe motor bracket.

Remove all bolts that secure the bracket tothe frame.

3. Using a hoist, support the bracket.

Jacking holes have been provided in thebracket mounting lugs to facilitate theremoval of the bracket from the framerabbet fit. Tighten the jack bolts evenly toavoid mis-alignment of the bracket duringremoval.

5. At this stage, the bearing is still seated inthe bracket bearing bore. Remove thebracket from the bearing by rocking thebracket from side-to-side while applying anaxial force on the bracket. After the brackethas cleared the bearing, use the hoist tomove the bracket off of the shaft and awayfrom the motor.

The bearing ca

puller arms behind the bearing outer racefor ball bearings and behind the bearinginner race for roller bearings. Protect theshaft center by using a spacer block ofbrass or some other soft material betweenthe shaft and bearing puller. Remove thebearing by applying axial force wi

With roller bearings, the bearing rollingelements and outer race are containedwithin the bearing bracket bo

bearing assembly can be removed from thebracket bearing bore by pulling on therolling elements or by tapping on the outerrace through the shaft bore in the bracket.

8. Clean and inspect all parts. Remove all oldgrease from


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11

cessary. Assemble the bearinginner caps onto the shaft.

10.

11.

ity of the bearing, cage and rollingelement area of the bearing, 100% with

cavities

and bracket bearing housing cavity with

grease.

reverse order ofSteps 1 through 6. Torque bolts per tableV.

INDING MA

9. All shaft bearing shoulders and journalsshould be free of nicks before replacingbearing. Dress shaft with emery cloth orstone as ne

Heat bearing to 250°F (120°C) for at least30 minutes.

Place bearing onto shaft. Make certain thatthe bearing is contacting the locating

shoulder on shaft. DO NOT use impact

force on bearing.

12. Let the bearing cool. Protect the bearingfrom contamination. Fill the outboard sidecav

grease. Fill the bearing inner cap

grease to 60% full. Fill the grease inlet pipe100% with

13. Assemble the brackets in

ROTOR AND STATOR REMOVAL

Consult Reliance Electric for proper removalprocedures.

W INTENANCE

Warnin SOLVENTS CAN BE TOXIC AND / OR

FLAMMABLE. FOLLOW MANUFACTURER’

S

S

AFETY PROCEDURES AND DIRECTIONS.

FAILURE TO OBSERVE THIS PRECAUTION

COULD RESULT IN BODILY INJURY.

Caution Do not use solvents containing trichloroethaneto clean interior or exterior of motor. Damage

ay occur to paint and insulatiom n system.

De-energize motor by opening manual discon-ect and locking out. To inspect the ends and

outside surface of the windings, remove thebrackets from the motor. Inspection of these

e numerous methods for cleaningsindings. The following methods are most

, in order of preference.

RY WIPING

his method is satisfactory when the surfaces

andcrease dirt collection. Lint is particularly

e on high voltage insulationystems as it tends to concentrate corona

N CLEANING

n

portions of the windings will provide a good in-dication of their general condition. To thor-oughly inspect and clean the windings it may benecessary to remove the rotor.

There ar wcommonly used

NOTE: Before cleaning the windings check forloose blocking, evidence of damage to insula-tion, distortion or movement of coils, etc. If anyof these conditions exist, contact your local Re-liance Electric Service Engineer for recommen-dations.

D

Tto be cleaned are accessible and when only drydirt is to be removed. Use a clean dry, lint-freecloth. The lint will adhere to the insulationinobjectionablsdischarge.

BRUSHING AND SUCTIO

Remove the dry dust and dirt by brushing with abristle brush, followed by a vacuum suction

cleaning. DO NOT USE WIRE BRUSHES.

BLOWING

Dry dirt and dust can be removed from inac-cessible crevices by using a jet of low pressure,oil free compressed dry air.

Caution To

p

avoid damage to the windings do not use air

ressures greater than 30 psi (200 kPa). Avoidway that the dirt wille blown into inner crevices.

directing the air in such ab

Warnin USE OF AN AIR JET MAY CAUSE FLYING

DEBRIS AND GENERATE PARTICULATE

ATTER. WEAR SUITABLE SKIN, EYE AND

OBSERVE THIS PRECAUTION COULD

M

RESPIRATORY PROTECTION. FAILURE TO


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12

RESULT IN BODILY INJURY.

SOLVENT CLEANING

Caution Do not use solvents with trichloroethane. Damage

may occur to paint and insulation system.

CLEANING WITH WATER AND DETERGENTWindings can be cleaned by hose washing orby pressure spray from a low pressure steamgenerator or shop steam line.

Caution To avoid damage to the windings, jet pressure

30 psi (200pa) and 90°C respectively.

and temperature should not exceedK

Oil, grease, tar and wax can be removed byadding a NON-CONDUCTIVE DETERGENT tothe wash water. After washing, it is necessaryto dry the windings in an oven. Bake in an oven(preferably a circulating air oven) at a

mperature not over 90°C until insulation

gnate the windings.onsult your local Reliance Electric Service

CHECKING INSULATION RESISTANCE

the

verse

esis e stator winding with megger orn ins

he m m insulation resistance (RM) can beetermined from t

RM = KV + 1

ial, in kilo-volts.

For mresistcommon. If the insulation resistance is lower

an that calculated from the formula, theut as follows:

rts on hand.riouvi totec

de

. Nearest Reliance Electric Sales Office.

o include complete nameplate data,

urchase order number, serial number, modelnumber, rating, etc., for your motor whenordering the spare parts list.

your nearest dis-ctory. When or-

dering parts for which a part number is not

teresistance remains constant.

RECONDITIONING WINDINGS

If after cleaning with solvent or water and de-tergent, the insulation shows signs of dryness, itmay be necessary to re-impreCEngineer for proper type and method of re-insulating the windings.

If motor has been in storage for an ex-tensive period or has been subjected to ad-

moisture conditions, check the insulation

tance of thr a ulation resistance meter.

inimuTd he following formula: Parts can be obtained from

tributor or directly from our fa

Where

RM = Minimum insulation resistance inmega ohms at 40°C of the entire machinewinding.

KV = Rating machine potent

achines in good condition, insulation andance readings of 10 to 100 times RM are

thwindings should be dried o

Bake in an oven (preferably a circulatingair oven) at a temperature not over 90°Cuntil insulation resistance remainsconstant.

RENEWAL PARTS

The high productivity expected in industry todaydemands a well planned maintenance program.The success of which often can depend on the

umber and type of spare panSe s consideration should be given to having

ll tal replacement components on handapro t the units against costly down time.

tailed parts list, which gives Reliance A

Electric’s recommendations for spare parts thatshould be stocked for your motor, can beordered from the following offices:

1

2. Nearest Reliance Electric Distributor.

3. Reliance Renewal Parts, Greenville, SC.

Be sure t

p

available, give complete description of part andpurchase order number, serial number, model


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13

ICA IFICS

phase induction motor with on boardmperature monitoring and real time power

ors andlectronics located in the main conduit box as

located onain conduit box is

c of the motor and ispartments. One

power leads andr

.

ACCESSIBLE MOTOR SENSORS

See assembly drawing for locations.

l)

Current Transformer

Water In Temperature

0-25mm/sec probe

0-25mm/sec probe

• r location

PowerMonitor 3000

1606 XLP Power supply

ohm RTDs (3 total)

Bearing Temperatures (one per bearing)

BASIC

Note:low require the explosion proofcover vices inside the conduit boxes.

Refer to proper mine site and

MSHA regulations for proper ser-vicing of devices inside an XPcond RT

1.

2.

3. ect RTD from CompactLogixmodule and check resistance with anohmmeter. Values of the RTD should

ms. If resistancevalues show infinity then the RTD has

wires or RTD if possible. If resistancevalues show close to zero or less than100 ohms then check the leads you are

number, etc. of the equipment on which the partis used.

SECTION 5: APPL

ICDS SYSTEM SNAPSHOT

The ICDS motor is a 1250 HP, 1.15 SF, 4160volt three

TION SPEC

• 12 volt DC supply

• DBT UOI Isolator

INTERNAL MOTOR SENSORS

temeasurement. The motor has sensewell as four other small X/P boxestop of the motor. The mlo ated on the drive enddivided into three comcompartment for electronics, a centercompartment for the maincu r, and a third compartmentrent transforme

for the potential transformers

• Potential Transformers35:1 ratio PT (2 tota

•

300:5 ratio CT

•

100 ohm RTD• Water Out Temperature

100 ohm RTD

• XP Enclosure Temperature100 ohm RTD

• DE Vibration Probe

• ODE Vibration Probe

ACCESSIBLE ELECTRONICS

See assembly drawing fo

•

• CompactLogix Controller

•

• Winding Temperatures (one per phase) 100

•

100 ohm RTDs (2 total)

TROUBLESHOOTING

The troubleshooting tips be-

s be removed to access de-

uit box.

D’s

If values displayed are exceptionallyhigh (greater than 185 C winding or 145C water and bearing temperatures) aloose wire could be the culprit. All

RTD’s terminate on one of two moduleson the CompactLogix rack. Confirm

placement and secure leads. No

external surface temperature

readings (water RTDs) should ever

exceed 145 C or motor must be de-

energized and allowed to cool.

Confirm proper water flow is going

through motor.

Numbers greater than 800 C indicate anRTD that has been disconnected,broken wires or the temperature ele-

ment has failed.Disconn

be less than 250 oh

failed or the wires between the elementand terminals are broken. Replace


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Documents

Instalacion Operacion y Mantenimiento Motores Large AC