3 phsae motor repair

8/7/2019 3 phsae motor repair

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INSTALLATION, OPERATION

AND MAINTENANCE MANUAL FOR

THREE PHASE ELECTRIC MOTORS

USED IN EXPLOSIVE ATMOSPHERES

(Low and High Voltage)

WEG INDSTRIAS S.A. - MQUINAS

REF. 660 - EN9300.0005 I/2 May 2003


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THREE PHASE ELECTRIC MOTORS USED IN EXPLOSIVE ATMOSPHERES

TABLE OF CONTENTS

1. GENERAL INFORMATION...........................................................................................................3

1.1. INTRODUCTION....................................................................................................................3

1.2. SAFETY INFORMATION .........................................................................................................3

2. GENERAL INSTRUCTIONS..........................................................................................................4

2.1. MOTOR APPLICATION ...........................................................................................................4

2.2. TRANSPORTATION................................................................................................................5

2.3. RECEIVING INSPECTION .......................................................................................................5

2.4. STORAGE .............................................................................................................................5

3. INSTALLATION...........................................................................................................................5

3.1. MECHANICAL........................................................................................................................5

3.1.1. FOUNDATION - BASE ....................................................................................................................... 5

3.1.2. COUPLING......................................................................................................................................... 5

3.1.3. ALIGNMENT....................................................................................................................................... 6

3.1.4 COOLING............................................................................................................................................ 6

3.1.5 VIBRATION / BALANCE...................................................................................................................... 7

3.2. ELECTRICAL ASPECTS ...........................................................................................................7

3.2.1 POWER SUPPLY................................................................................................................................ 7

3.2.2.CONNECTIONS .................................................................................................................................. 8

3.2.3 ROTATION DIRECTION ..................................................................................................................... 9

3.2.4 PROTECTIONS................................................................................................................................... 9

3.2.5 INSULATION RESISTANCE ............................................................................................................... 9

3.2.6 ADJUSTMENT OF MOTOR PROTECTION DEVICES ..................................................................... 10

3.2.7 ELECTRIC CONNECTION CHECKING............................................................................................ 10

4. MECHANICAL INSTALLATION CHECKING................................................................................10

5. NOISE LEVEL ............................................................................................................................11

6. MAINTENANCE.........................................................................................................................11

6.1. LUBRICATION.....................................................................................................................11

LUBRICATION PROCEDURES ................................................................................................................. 11

6.1.1. QUALITY AND QUANTITY OF GREASE......................................................................................... 12

6.1.2. COMPATIBILITY .............................................................................................................................. 12

6.1.3. GREASE LUBRICATED BEARINGS................................................................................................ 13

6.1.4. OIL LUBRICATED BEARINGS......................................................................................................... 13

6.2. MAINTEANCE PLAN............................................................................................................. 13


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1. GENERAL INFORMATION

11..11.. IINNTTRROODDUUCCTTIIOONN

This Manual is intended to supply and clarifyimportant topics that must be followed accordinglyincluding transportation, installation, operation andmaintenance of Weg motors used in explosiveatmospheres. Therefore, we recommend to readit carefully before performing any installationservice or before operating the electric motor.Once this Weg motors has been designed forexplosive atmospheres, all safety informationdescribed in item 1.2 below should be followedcarefully.

11..22.. SSAAFFEETTYYIINNFFOORRMMAATTIIOONN

QUALIFIED PERSONNEL are thosepeople who based on their education,experience, knowledge of standardsand service conditions required are

duly authorized to perform any service on themotor. Furthermore, these people should knowand how to carry out first aid procedures.If you still have further doubts about this,especially in reference to specific productinformation, WEG is willing to provide suchinformation via its network of authorized serviceagents and/or representatives.

When any motor or equipment isused out of the industrial area, itis the endusers responsibilityto provide all

safety and protection information whileinstalling the motor (for example, to avoidthat people come close to the motor, andothers.

Additional information aboutinstallation, operation andmaintenance of electricequipment.

Warning!

During operation, such equipment hasenergized or rotating parts that may presenthigh temperature. So open terminal boxes,unprotected couplings, incorrect handlingmay cause serious accidents to people and/ormaterial damage.The people responsible for installation safetyshould ascertain that:- Only qualified personnel perform

installation and operation services on theequipment;

- This personnel must carry this Manualalong with other documents supplied withthe motor, and the works should beperformed in accordance with specificstandards and documentation for thisproduct;

- Unqualified personnel should neverperform any work on electric equipment;

- If installation and safety instructions arenot followed accordingly, warranty may bevoid.

We recommend that allservices related to installationplan as well as all

transportation activities,storage, assembly, installation, start-up, maintenance and repairs should becarried out only be qualified personnel.Special attention should be paid to: Technical data referred to allowed

applications (assembly conditions,connections, and installationconditions), included in this Manual,Purchase Order documentation,operation instructions, manuals andother documents;

Instructions and specific conditions for

installation on site; The use of proper tools and equipment;

for handling and transportation: That all protection devices of each

component are removed beforeinstallation.

Additionally, all individual parts must bestoraged in vibration-free rooms so as toavoid damages, knocks without causinginjury to people.For practical reasons, it is not possible toinclude in this Manual detailed

information that covers all constructivevariables, nor covering all possibleassembly, operation or maintenancealternatives.For this reason, the present Manual onlyincludes required information that allowqualified and trained personnel torequired to carry out the work.


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In order to allow Weg to provide a prompt service,within technical standards, the motor serialnumber that is available on the identificationnameplate should be supplied.

Aiming at a satisfactory motor performance, wesuggest to make the installation plan,commissioning, start up and maintenance inconjunction with WEG Service p Department

people.

EN 60034-1 Electric Rotating MachinesEN 50014 General Standard for Explosion ProofEquipmentEN 50016 Explosion Proof "p"EN 50018 Standard for EEx "d" ProtectionEN 50019 Standard for EEx "e" ProtectionEN 50020 Standard for EEx "i" ProtectionEN 50021 Standard for EEx "n" ProtectionIEC 79-15 Standard for Ex "n" ProtectionIEC 79-2 Standard for Ex"p" ProtectionNBR - 9883 Increased Safety Ex "e"

2. GENERAL INSTRUCTIONS

22..11.. MMOOTTOORRAAPPPPLLIICCAATTIIOONN

Based on the above mentioned Standards, WEGmotors are intended for industrial applications.

It is not allowed to use standard designmotor in explosive atmospheres if theyhave not been specifically certified forsuch purpose.

This symbol indicates the presentparagraph contains importantinformation about explosiveatmospheres, which must be strictlyfollowed to avoid damages and risks.

If a customer makes special requirements, he willbe then responsible to provide safety measures. Ifthere will be ambient not meeting the followingrequirements:1. Temperature: -20C up to +40C;2.Altitude: 1000 masl;3. Or in environments containing water and dust,

motor installation will only be allowed if suchmotor is specifically designed for such purposewith instructions on its nameplate.

Safety and start up instructionsmeet the followind standards:

WEG states that all information includedin this Manual make part of the contractand motor warranty.

If this Installation andMaintenance Manual gets lost,WEG may provide an additionalsample.

Is still required, WEG is prepared to solve anyfurther doubt you may require. In this case,motor serial number should be also supplied.

To prevent from eventual motoroperating problems, werecommend that all maintenanceand revision services described

in this Installation, Operation andMaintenance Manual be carried out by dulytrained personnel. Changes of ratedoperating characteristics, such as excessdemand of energy, increase in temperature,noise level, abnormal smell and tripping ofprotections are the first signs of any

abnormal occurrence. In this case, to avoidmaterial damage or injury to people,maintenance people should be immediatelyinformed about such circumstances.

In case of doubt, switchmotor of immediately!

We recommend that all personnelresponsible for the application ofelectric motors in hazardousareas have been duly trained forsuch purpose.


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During installation, operation and maintenance,the following symbols must be considered:

Safety and warranty warning;

Additional information about EEx-emotor;

Danger!

22..22.. TTRRAANNSSPPOORRTTAATTIIOONN

Weg motors are supplied with a shaft-lockingdevice. Corrosion resistant protection is applied onall machined surfaces as well.

Motor should only be lifted by the eyebolts. Theseeyebolts have been designed to hold motor weightonly. So avoid lifting additional loads.

Special care should be taken with the motorpackage so as to avoid any damage to it.

22..33.. RREECCEEIIVVIINNGG IINNSSPPEECCTTIIOONNWhen receiving the motor, check if any damagehas occurred during transportation. Then removethe shaft locking device and keep it in a safe roomonce it needs to be uses on future transportation.If anything has been noticed, notify immediatelythe carrier, the insurance company and WEG.

Failure in giving notice to thecarrier, to the insurance companyand to WEG may result in loosingthe warranty.

Do not remove the existing protecting grease fromthe shaft end, nor the stoppers or plugs thatclosed the terminal box holes, if any. Theseprotection items must be kept in place until thefinal installation is has been concluded.

After being removed from the package, a completevisual inspection on the motor should be made.Motors supplied with roller bearings, shaft shouldbe rotated manually a few times for a uniformgrease distribution.

22..44.. SSTTOORRAAGGEE

When motor is not unpacked immediately afterreceiving, it should be maintained in placesprotected from humidity, vapors, sudden heat

changes and rodents. To avoid bearing damage,motor should also be storage in places free ofvibrations. Any painting damage and grease, theselocals should be fixed so as to avoid future rusting.

3. INSTALLATION

33..11.. MMEECCHHAANNIICCAALL

3.1.1. FOUNDATION - BASE

Motor feet be uniformly level on a metallic base toavoid frame bending. Shims up to 2mm may beused to adjust the leveling.

3.1.2. COUPLING

For cost, saving of space and to avoid belt slippagealong with accident prevention, direct coupling ispreferred. Also in cases gear boxes are applied,preference should be given to direct coupling.When pulleys are used, we recommend to heat itup to 80C and have it mounted at hot usingsuitable tools.To avoid bearing and shaft end damage, mountingand dismounting of pulleys must be made withsuitable tools.

Whenever motor istransported, reuse shaft-locking device.

To avoid accidents anddamages to the motor, it

should be always lifted withpropoer cables and devices.

WEG will not be responsiblefor the design and foundationof the base.


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In cases of belt coupling, belts can notbe affected electro statically.

The couplings used must be suitable to withstandradial and axial vibrations during operation.Special care must be taken to avoid that theallowable load and speed limits given be thecatalogs are not exceeded.WEG motors are factories balanced with half key.This means that couplings, pulleys, tooth wheels,etc must also be balanced with half key.

3.1.3. ALIGNMENT

Especially in cases of direct couplings, motor shaftmust be aligned axially and radially with thedriven machine shaft.

Incorrect alignment can lead to bearing damage,vibrations or even cause shaft rupture.

Correct alignment can be ensured with thew useof dial gauges, as shown in figures 3.3.1, 3.3.2and 3.3.3.

If considering a complete shaft turn, misalignmentshould not exceed 0.03 mm.

Fig. 3.3.1 - Axial reading (parallelism).

Fig. 3.3.2 Radial reading (concentricity).

Fig. 3.3.3 Axial and radial reading combined.

The axial alignment (dimension E) between thehalf couplings should be performed in accordancewith manufacturers recommendations.When making the alignment/leveling, influence oftemperature on the motor and driven machineshould be taken into consideration.Expansion effect of the components may changethe alignment/leveling conditions duringoperation.

3.1.4 COOLING

During installation, all cooling conditions shouldbe considered. The recommended installation

distance between air inlet into the motor and thewall should be at least of the air inlet diameter.A person should also be able to pas in and out tocarry out cleaning services on the air inlet screen.Machines that are cooled with ambient air, airinlet screens must be cleaned at regular intervalsso as to ensure free passage of air. The warm aircan not be sucked again by the motor.- Vertically mounted motors with air inlet on top,

the air opening must be protected by a propercover so as to avoid dropping of foreignmaterials vertically into the motors.

- For independent cooling machines, tubes andfans must be designed based on air flowrequired by the machine.

While mounting and dismountinga pulley, never make pressure orknocks on the bearings.

Always use flexible couplings;rigid couplings require specialbearing arrangement as well asaxial and radial alignment of theshafts.

Excess belt tension may causebearing damage and lead to shaftrupture.

If required, WEG can offer itspersonnel duly trained, as well asa laser equipment to make thealignment/leveling of the motorand driven machine.


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- Protection systems for continuous monitoringof pressure and tube air flow must beprovided.

- In case of machines with internal coolinghaving Degree of Protection IP, tubes, fansand filters should be suitably designed andproduced, and correctly mounted.

- All protections provided for transportation andstorage of the machine should be removedright before the installation.

- Considering that direct sun heat causesincrease in temperature, externally installedmotors should be always protected againstweathering.

3.1.5 VIBRATION / BALANCE

- All WEG motors are dynamically balanced withhalf key;

- They are balanced in conformity with appliedstandards meeting the balance degreerequired by the specification;

- The vibration with the machine coupledshould be higher than the values given bytable 3.5.1 below;

- Alarm and tripping levels must be adjusted asindicated in table 3.5.1 ensuring that themachine are always switched-off whenreaching the preset figure;

Switch-off!Vibration level

excessively high

Regular

Satisfactory

Good

K M G

Table 3.5.1.

K Low output motors < 15kW.M Medium output motors > 15kW to < 500kW.G Large output motors > 500kW.

33..22.. EELLEECCTTRRIICCAALL AASSPPEECCTTSS

3.2.1 POWER SUPPLY

Make sure the motor is connected to the correctpower supply.The cable gauges and the protection devices mustbe designed based on the motor rated current.

The Weg motors are designed according to IEC34-1, NBR 7094 and designed for a rated voltage+- 10%.For rated frequency, a variation of 95% to 103%(Range B) is allowed.

Eex-e are designed for a ratedvoltage of +- 5% and for afrequency variation of 2%

(Range A).

The curves of Figure 4.1.1 and Figure 4.1.2 belowshow the effect of voltage and frequency variationon the motor performance characteristics.

Percent variation of the motorcharacteristics

+20

+16

+12

+8

+4

0

-4

-8

-12

-16

-20

-10 -8 -6 -4 0 +2 +4 +6 +8 +10-2

02

03

04

05

06

01

Fig. 4.1.1. - Percent variation of the voltage.

Caption of Fig. 4.1.1:1 Slip

2 Rated current3 Power factor4 Efficiency5 Starting current6 Starting and breakdown torque

28.0mm/s15

7,5

7,1

4,5

2,8

1,8

1,12

0,71

0,45

0,28


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-4

-8

-10

-5

06

-6

-2

-4

0

+2

05

04

03

-3 -2 -1

+6

+8

+10

+4

02

01

+10 +2 +3 +4 +5

07

Fig. 4.1.2.- Percent variation of the frequency.

Caption of Fig. 4.1.2:1 Starting torque2 Starting current3 Rated current4 Efficiency5 Speed6 Friction and fan losses

3.2.2.CONNECTIONS

Open the terminal box and check pertinentdetails, if required. Check if the rated voltage isthe same as that given on the motor nameplate.Specify connection cables to meet motor ratedcurrent taking into consideration environmentfactors (such as ambient temperature, installationtype, etc).

Low voltage three-pole cables isolated with PVC 1kV

Current No. of leads Cable gauge

> 600... 800A 2 300 mm2

> 400... 600A 2 185 mm2

> 300... 400A 1 300 mm2

> 200... 300A 1 185 mm2

200 A 1 95 mm2

Medium voltage three-pole cables isolated withPVC > 1,0... 11kV

Current No. of leads Cable gauge

> 200... 315A 1 240 mm2

> 100... 200A 1 120 mm2

100A 1 35 mm2

1. The screws should be pressed with torque of35Nm.

2. The window of pressure relief should not bedamaged during the assembly andmaintenance.

After the conclusion of these works must be madea visual inspection e, if necessary, be made therepair of these points with original seals.

NOTE:The gauge of the feeding cables must be inaccordance with the motor documentation.

Press TorqueNm

M 12 15,5Pin thread d

M 16 30

NOTE:If two parallel handles will be connected, theconnection in the pins must be made in

agreement bellow drawing:

The effects given herewith are notapplied generally, hence they are notvalid to all motors!


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3.2.3 ROTATION DIRECTION

If the power supply cables are connected in thephase sequence R, S, T with U. V, W or 1, 2 and 3,

motor will turn clockwise. If two connections arereversed, that is, if the power supply with thesame sequence of phase R, S, T is connected with

V, U, W (or U, W, V or W, V, U), the motor willturn counter clockwise. The cable metallicprotections (equipotential protection) must beconnected to the grounding which is provided forsuch purpose inside the terminal box.

Motors designed for explosiveatmospheres must be fitted withsuitable terminals and pressure

washers. Pay attention to minimum insulation

distance between cables when making theconnection.

Before closing the terminal box, make sure allterminal nuts and grounding connections are dulyfastened. Also make sure that all lead outletsealing that are certified are in perfect conditionsand installed correctly.

Any opening not in use must be closed withcertified plugs.

3.2.4 PROTECTIONS

The motors are supplied with temperaturedetectors PT100 in Protection EEx and / or EEx ifor just measurement of the temperature, oreither, to monitor the temperature in overloadcase, sub-voltage or fan fail, etc. The references ofthe respective certificates must be considered.

NOTE: When the motor will beequipped with temperature detector(PT 100) for Intrinsic Security (EEx i),

the measurement system connected to this sensorwill have to respect the described conditionsbelow, and the measurement equipment should becertified for the same protection.

Electric valuesOperation Voltage Ui 60VMeasured Current 0,8 mA ... 2 mAOutput max. 1,5 W(in case of fail )

The connectors for Intrinsic Security (EEx i) can berecognized for the color, that in this in case is blue.

The cables are taken from the motor terminal boxto a temperature detector which is installed incontrol panel.

When requested by the customer forspecial application conditions, motorcan also be supplied with severalthermo sensors for winding and

bearing protections and others.The temperature of the PT100 calibratedresistance may be calculated with the formulagiven below:

R = Resistance measured in thePT100.T = Temperature in C.

We recommend to adjust the relays at thefollowing temperature range:

ComponentThermal

class Alarm Tripping

F 140C 155CWinding

H 155C 180CBearing - 100C 120C

Temperature values for alarm and tripping.

Alarm and tripping values can be defined based onthe application, however, that can not exceed theabove figures.

For hazardous area motors, themaximum tripping time for theprotection device an not be, in caseof overload or locked rotor, exceed

the time limit given by the certification of theprototype-EG as well as the time to indicated onthe motor nameplate.

Heavy starts: Motors that aresubmitted to acceleration timeconditions > 1.7 x time to mustbe protected with over current

protection devices based on the Certificate ofConformity.

3.2.5 INSULATION RESISTANCE

When a motor is not immediately installed, itshould be then protected against moisture, heat,dirt so as to avoid deterioration of the insulation.Winding insulation resistance should be measuredbefore operating the motor for the first time, or ifmotor is kept in stock for long periods of time, orlong switching-off periods of time. If motor isstoraged in rooms with moisture, insulationresistance must be measured at periodicalintervals.

Minimum resistance value should be above 25MM.Table 4.4.1 provides resistance values measuredunder operation. Table 4.4.2 gives informationabout polarization index.

385,0

100=

RT


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Insulation ResistanceInsulation

Resistance ValuesValuation

< 2M Unsatisfactory

25 ...100M Regular

100...500M Satisfactory

500...1000M Good

> 1000M ExcellentTable 4.4.1

Polarization Index (1 until 10 min.)Polarization Index Valuation

< 1.5 Unsatisfactory

1.5 until 2.0 Regular

> 2.0 Satisfactory

Table 4.4.2

Disconnect motor from power supplybefore making any insulationmeasurement.

To avoid electric discharge risks,discharge the terminals right afterperforming the measurement.

3.2.6 ADJUSTMENT OF MOTOR PROTECTION

DEVICES

Motor protection devices for explosiveatmospheres must be alwaysswitched-on, and the adjustmentsshould be done in accordance with

Standard EM 60079-14, DIN VDE0165 and NBR5410. If there is no other indication, motors arethen designed for S1 service duty (continuous).

All protections, including theovercurrent ones, must be adjustedbased on the rated motor conditions.This protection must also protectthe

motor in case of short-circuit (that is, in case oflocked rotor).

Winding with Delta connection must be protectedagainst single phase. To do that, connect therelay in series with the winding phases and adjustat 0.58 times the rated current.

All winding and bearing protectionsmust be always switched-on andcorrectly adjusted.

3.2.7 ELECTRIC CONNECTION CHECKING

- Check periodically if all connections andterminals inside the terminal box are firmlymade;

- Check if leads passage in the terminal box,cable gland and terminal box sealing;

- Remove all dust and dirt from terminal box, ifany.

Any service on electric machinesshould only be carried out when

it is completely stop and allphases disconnected from the

power supply.

4. MECHANICAL INSTALLATIONCHECKING

- Check if all motor fixing bolts are dulyfastened;

- Check coupling eccentricity, measure axial andradial clearance and compare such figures withmaximum specified values;

- Measure machine vibration levels periodicallyand compare results with figures given byTable 3.5.1.

If motor will remain in stock for longperiods of time without having thespace heater switched-on, waterinside the motor may becomecondensed.

Condensed water may be drained by removing thethreaded drain plugs placed on the drain holes.However, after drainage, these threaded drain

plugs must be refitted and glued with Loctite 221.

The drain hole must be kept closed during theoperation.

If required by the application, otherprotection devices other than thosegiven above may be installed.


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5. NOISE LEVEL(Acoustical properties)

To ensure a low noise level operation, the sourceof noise must be identified and how such noise istransmitted through the ambient. The followingmotor components may generate noises within naaudible range:

1. Cooling system.2. Bearings.3. Magnetic circuit.

The noise level of an electric motor, however,depends mainly on its size, cooling system, speedand degree of mechanical protection (enclosure).Cooling system is airborne and usually affects only

the noise level in the area where motor is installed.This noise level may be reduced by using mufflers.Noises caused by bearings or in the magneticcircuit are originated from mechanical vibrations ofindividual parts or the motor set, and they aretransmitted through the foundation, walls, coolingpipes of the machine. This type of noise can bereduced by installing the motor on suitabledesigned anti-vibration dampers. It is important tonote that incorrect dampers may even increasevibrations.

6. MAINTENANCE

66..11.. LLUUBBRRIICCAATTIIOONN

Depending on the application, load, speed,temperature conditions and size, Weg motors maybe supplied with grease or oil lubricated bearings.Operational safety of these motors will depend onthe compliance of the lubrication intervals.

For correct lubrication, always use the

type of grease indicated on the motornameplate.

For grease lubricated bearings, we recommend touse greases with the following characteristics:

GREASES FOR MOTOR BEARINGSTemperature Range: -20 until 130C

Fabricant Grease Fabricant GreaseEsso

Shell

UnirexPolyrex EMAlvnia R2

AtlanticIpirangaTexaco

Litholine 2Isaflex

EP2Mutifak2

KluberStaburagsN12MF*

Petrobrs GMA2

As a rule, motors should be greased with themotor in operation. Otherwise, the grease, insteadof going through the bearing area, will penetrateinto the motor.

NOTE: Before performing the lubrication, carefullyclean the grease fittings and surrounding areas.

Fig. 6.1.1 - Grease flow into the bearing housing.

Storage old grease correctly.

LUBRICATION PROCEDURES1. Remove the grease relief cover, if any;2. Clean the area around the grease fitting using

a clean cotton fabric;3. With the motor running, add amount of grease

indicated on the motor nameplate;4. Leave the motor running for 1 to 2 hours to

allow drain of the excess of grease. Replacethe grease relief fitting, if any;

5. During lubrication, increase in bearing

temperature may be noticed. However, afterone hour of operation, motor should achievenormal operating temperature. See Figureabove.


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Fig 6.1.2.

6.1.1. QUALITY AND QUANTITY OF GREASE

The relubrication can only be made with

compatible grease and in the amount indicated onthe motor nameplate as lacking of grease orexcessive grease affect the bearings.Excessive greasing causes overheating due to highresistance causes by rotating parts resulting indamage to grease properties.

Additionally, excess of grease may cause leakagewith the grease penetrating into the motorwinding.Lithium and bisulfate of molybdenum basedgrease are commonly used as they are of goodmechanical stability, are insoluble in water and

have melting point of approximately 200C.

LUBRICATION INTERVALS FOR HORIZONTALLYMOUNTED MOTORS BASED ON OPERATINGHOURS

ROLLER BEARING

Bearings Poles

Operating

hours

(h)

Quantity of

grease

(g)

8 4000

6 320035

NU320

4 1600 50

8 3800

6 300040NU222

NU3224 1300 60

8 3700

6 2800 45NU224

4 1100 75

8 3500

6 240050NU226

NU3264 920 85

8 3300

6 200055NU228

NU3284 680 95

NU230 8 3000 65

NU232 8 2600 70

NU234 8 2300 85NU238 8 1800 95

NU244 8 1200 130

NU248 8 920 160

NU252 8 680 195

6.1.2. COMPATIBILITY

Lubrication intervals and amount ofgrease given in the table below

should only be taken as tentativeinformation. For relubrication,

follow the intervals and grease amountsindicated on the identification nameplate.

5 min ... 60 min

5 K ... 20 K

~~

~~

Use only the type of greaseindicated on the motornameplate.


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RELUBRICATION INTERVALS FOR HORIZONTALMOUNTED MOTORS BASED ON OPERATINGHOURS

LOCKED BALL BEARING

Bearing Poles

Operating

hours

(h)

Quantity of

grease

(g)

4 34006314

2 93030

4 32006316

2 50035

8 5100

6 4200256218

63184 3000 45

8 5000

6 400035

6320

4 2800 50

8 4800 40

6 39006322

4 2600 60

8 4700

6 370045

6224

6324

4 2300 75

8 4400

6 3500506226

63264 1800 85

8 41006228

6 320055

8 3800

6 2900656230

63304 970 105

6.1.3. GREASE LUBRICATED BEARINGS

6.1.4. OIL LUBRICATED BEARINGS

For motors with oil-lubricated sleeve bearings, oillevel must be checked periodically. Bearing frame

must be kept clean to ensure an improve heatdissipation. We recommend to replace the oil every8000 operating hours, or every time oil propertiespresent any change.Oil viscosity and Ph should be checked at regularintervals.

Oil level should be check daily, whichmust be at sight glass center.

The oil to be used must have the followingcharacteristics:

Mineral oilFlame point > 200CCritical flow rate = - 20C

ViscositysISO VG-32ISO VG-46ISSO VG-68

As the oil viscosity changes with the temperature,oil supplier information should be considered whenselecting it.

66..22.. MMAAIINNTTEEAANNCCEE PPLLAANN

- Damaged parts (with cracks, damagedmachined parts and defective threads) must bereplaced. It is recommended not to repair such

parts.- All services described herewith should be

carried out by skilled and experienced peopleso as to avoid damage to the equipment.. Incase of doubt, contact WEG.

For motors to be used in explosiveatmospheres, we do not recommendto repair damaged or worn parts. For

a safe repair, we recommend to buy original newparts from the factory. So the following plan isrecommended:

Oils with different viscosities shouldnot be used without contacting WEG

Standard lubrication intervalsapplied to 40C ambienttemperature;For vertically mounted motors,

lubrication intervals must be reduced by half;Bearing average temperature considered T =90C;For ambient temperature other than 40C,apply the following corrections:Tamb = 45C (lubrication interval at 40C) *0.6Tamb = 50C (lubrication interval at 40C) *0.36.


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DAILY

-Completely motor. -Check the noise.

-Bearings.-Check noise and

vibration.

WEEKLY

-Bearings.

-Regrease: followregreasing intervalsbased on lubricationinstructions.

-Coupling.

-After a week: checkalignment and fixationand eventuallyrefasten.

-Monitoring devices. -Record measuredfigures.

-Filter. -Clean, if required.

ANNUALLY (Complete revision)

-Complete motor -Refasten bolts

-Stator and rotorwinding

-Visual inspection;Measure insulationresistance.

-Terminal box,grounding

-Clean inside ofterminal box;

-Refasten bolts.

-Coupling-Check alignment and

refasten bolts

-Filter-Clean (when

required)

EVERY 3 YEARS (Complete revision)

-Complete motor.-Take motor apart;-Check spare parts.

-Stator and rotorwinding.

-Clean it;-Check winding andwedges winding;

-Measure insulationresistance.

-Bearings.

-Clean bearings;-Replace, if require;-Check half coupling

and replace it, ifrequired;

-Check shaft seat andrepair it, if required.

-Terminal box;grounding.

-Clean inside andrefasten bolts.

-Coupling.-Check alignment and

refasten bolts.

-Monitoring devices.-Take apart, if possible

and test its operationcapacity.

-Filter. -Clean it.

-Air-air heatexchanger.-Clean heat exchangertubes.


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WARRANTY TERMS FOR ENGINEERING PRODUCTS

These products, when operated under theconditions stipulated by WEG in the operatingmanual for such product, are warranted againstdefects in workmanship and materials for twelve(12) months from start-up date or eighteen (18)months from manufacturer shipment date,whichever occurs first.However, this warranty does not apply to anyproduct which has been subject to misuse,misapplication, neglect (including withoutlimitation, inadequate maintenance, accident,improper installation, modification, adjustment,repair or any other cases originated frominadequate applications).The company will neither be responsible for anyexpenses incurred in installation, removal fromservice, consequential expenses such as finantiallosses nor transportation costs as well as ticketsand accomodation expenses of a technician whenthis is requested by the customer.The repair and/or replacement of parts orcomponents, when effected by WEG within theWarranty period do not give Warranty extension,unless otherwise expressed in writing by Weg.This constitutes WEG's only warranty in

connection with this sale and is in lieu of all otherwarranties, expressed or implied, written or oral.There are no implied warranties ofmerchantability or fitness for a particular purposethat apply to this sale.

No employee, agent, dealer, repair shop or otherperson is authorized to give any warranties onbehalf of WEG nor to assume for WEG any otherliability in connection with any of its products.In case this happens without Weg's authorization,Warranty is automatically cancelled.

LIABILITY

Except as specified in the foregoing paragraphentitled "Warranty Terms for EngineeringProducts", the company shall have no obligationor liability whatsoever to the purchaser, including,without limitation, any claims for consequentialdamages or labor costs, by reason of any breachof the express warranty described therein.The purchaser further hereby agrees to indemnifyand hold the company harmless from any causesof action (other than cost of replacing or repairingthe defective product as specified in the foregoingparagraph entitled "Warranty Terms forEngineering Products", arising directly or indirectlyfrom the acts, omissions or negligence of thepurchaser in connection with or arising out of the

testing, use, operation, replacement or repair ofany product described in this quotation and soldor furnished by the company to the purchaser.

WEG INDSTRIAS S.A. - MQUINASAv. Pref. Waldemar Grubba, 3000 - 89256-900 - Jaragu do Sul/SC

Phone: 55 (47) 372-4000 - Fax: 55 (47) 372-4030So Paulo/SP: Phone: 55 (11) 5053-2300 - Fax: 55 (11) 5052-4202

www.weg.com.br


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DECLARATION OF CONFOMITYManufacturer: WEG Indstrias S. A. Mquinas

Address: Av. Prefeito Waldemar Grubba, 3000.89256 900 - Jaragu do Sul, SC. - BrazilCNPJ: 79.670.501/0013-79

Product: Three Asynchronous MotorsHGF, MGF.

We, WEG Indstrias Mquinas herewith state, under our sole responsibility, that the motors mentionedabove have been manufactured meeting EN 60 034-1 and in accordance with the following Standards:For Eex-e motors: For Eex-p motors: For Eex-n motors:EN 50014 EN 50014 EN 50014EN 50019 EN 50016 EN 50021NBR 9893 IEC 79-2 EN 79-15

These specified products are exclusively intended for assembly on other machinery and they fully complywith Directive 94/9/EG.

Additionally, the same products will serve to drive other machinery. Therefore, they can not be operated ifthe final product set does not comply with Directive 94/9/EG.

For explosive atmospheres, always refer to the Installation, Operation and Maintenance Manual for WEGMotors.

WEG Indstrias S.A. - MquinasJaragu do Sul, June 7, 2000.

Roberto Bauer Roberto Krelling Director Director

3 phsae motor repair

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