User Manual for MARATHON models including: 5KCP33KNB267AS AC Induction Motors, 5KCP33KNB267AS, AC Induction Motors, Motors

Catalog Page - Marathon Motors

Marathon Motors 5KCP33KNB267AS :: Motor, Blower, 1PH, 1/10HP, 115/230VAC, 3250/2700RPM :: Rexel USA

Marathon Motors 5KCP37SNC304S :: Motor, 1/2HP, 115/230VAC, 1075RPM, 1/3PH, Stainless Steel :: Gexpro


File Info : application/pdf, 15 Pages, 298.87KB

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EEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE

motor is suitable for use on Pulse Width Modulated (PWM) type VFD

power. In addition, the nameplate must be marked with the inverter

rating; for example, "2:1 CT", "2 to 1 Constant Torque", etc.

<, (% '' $9 5 $9 ; $ % $ $ (; ( 7 ' %.:

<,< ' %$ ' ( %.

5 $ 6* ' %$ ' (& F & G $? Electrical connections shall be made by a qualified electrical personnel in accordance with all applicable codes, ordinances and sound practices. Failure to follow these instructions could result in serious personal injury, death and/or property damage. Only qualified personnel who are familiar with the applicable National Code (USA = NEC) and local codes should install or repair electrical motors and their accessories.

5 $ 6* ' %$ ' ' = $ / % & G $? Do not touch electrically live parts. Disconnect, lockout and tag input power supply before installing or servicing motor (includes accessory devices). Use a voltmeter to verify that power is off before contacting conductors.

5 $ 6* ' %$ ' 6$ / ? 6 & G $? Failure to properly ground motors, per the National Electrical Code (NEC) Article 430 and local codes may cause serious injury or death to personnel. For general information on grounding refer to NEC Article 250. (Also see "Ground Connections section 3.4.4").

5 $ 6* /% % $ ( % ;$ % % $ & G $? Do not use automatic reset protectors if automatically restarting the motor will place personnel or equipment at risk. . Failure to follow this instruction could result in serious personal injury, death and/or property damage

5 $ 6*

/ ' $ ( % ;$ % % $ & G $?

If a tripped manual reset thermal protector is exposed to a temperature

less than ­7°C (20°F) it may reset and restart the motor automatically. If

an application requires a motor with a manual reset thermal protector that

will be operated at temperatures less than ­7°C (20°F) contact the

manufacturer to review the application / motor requirements. Failure to

follow this instruction could result in serious personal injury, death and/or

property damage

<,# &

' ( %.

5 $ 6* ' ( ; $%( & G $? Before starting the motor, remove all unused shaft keys and loose rotating parts to prevent them from flying off. Failure to follow these instructions could result in serious personal injury, death and/or property damage.

5 $ 6* $ % % 6 ; $%( & G $? Keep extremities, hair, jewelry and clothing away from moving parts. Failure to follow these instructions could result in serious personal injury, death and/or property damage.

<,! = $

% ' ( %.

5 $ 6* & G $? /( ' % ( (1) The NEC and the local authority having jurisdiction must be consulted
concerning the installation and suitability of motors for use in Hazardous Locations. The local authority having jurisdiction must make the final determination of what type of motor is required. The application and operation is beyond the control of the motor manufacturer. (2) Division 1 Hazardous Locations motors can only be modified or reworked by the manufacturer or a facility that is Listed under UL's category "Motors and Generators, Rebuilt for use in Hazardous Locations". Failure to follow these instructions could result in serious personal injury, death and/or property damage. (3) Do not use a Hazardous Locations motor with a Variable Frequency Drive (VFD) unless the motor nameplate specifically states that the

#, $ = 6 ? (; %

#,< % ' (; % ( #,<,< & F ; F 6 ' (% ? (; % the
packaging to make certain no damage has occurred in shipment. If there is visible damage to the packaging, unpack and inspect the motor immediately. Claims for any damage done in shipment must be made by the purchaser against the transportation company.

#,<,# %/$

% $ (& % by hand to be certain that it

rotates freely. Note: Shaft seals and bearing seals may add drag.

#,<,! & F

;' % for conformance with purchase

order requirements and compliance with power supply and control

equipment requirements.

#,# & ?' 6*

5 $ 6* '' 6 7C % & G $?

01

4 4 +-

)

4

0-

10 -

unless specifically stated otherwise on the motor).

Utilizing the motor lifting provision to lift other components such as

pumps and gear boxes could result in serious personal injury, death

and/or property damage.

5 $ 6* '' 6 7C % & G $? Before using the lifting provision, check the eyebolts and/or other lifting means to assure they are not bent or damaged and are completely threaded, seated & secured to the motor. Equipment to lift motor must have adequate lifting capacity. While lifting the motor DO NOT stand under or in the vicinity of the motor. Failure to follow these instructions could result in serious personal injury, death and/or property damage.
#,#,< ' % 6 6' ' % % (

#,! (% $ 6 * Motors, not put into service immediately, must be
stored indoors in a clean, dry location. Avoid locations with large temperature swings that will result in condensation. Motors must be covered to eliminate airborne dust and dirt. If the storage location exhibits high vibration, place isolation pads under motor to minimize damage to motor bearings.

#,!,< 7 $ 6 '/7$ % * Bearings are grease packed
at the factory; relubrication upon receipt of motor or while in storage is not necessary. If stored more than one year, add grease per lubrication instructions (Table 4 4) before start up.
#,!,# (& % $ % % * It is recommended that the motor
shaft be rotated 5 to 10 rotations every three months to distribute the grease in the bearings. This will reduce the chance for corrosion to form on the bearing rolling elements and raceways. Note: Shaft seals and bearing seals may add drag.
#,!,! ? ; $ &/ ? (% $ 6 ' % (: Treat
unpainted flanges, shafts, and fittings with a rust inhibitor. Apply appropriate power to the motor's space heaters (if so equipped)

!, (% '' %

? ;$%

5 $ 6* Only qualified personnel who are familiar with the appropriate national code, local codes and sound practices should install or repair electrical motors and their accessories. Installation should conform to the appropriate national code as well as local codes and sound practices. Failure to follow these instructions could result in serious personal injury, death and/or property damage.

5 $ 6* ' %$ ' ' = $ / % & G $? Do not touch electrically live parts. Disconnect, Lockout and Tag input power supply before installing or servicing motor (includes accessory devices). Use a voltmeter to verify that power is off before contacting conductors.

!,< ' %

!,<,< ( ' % 6 ' % * Consideration should be
given to environment and ventilation. Motors should be installed in an area that is protected from direct sunlight, corrosives, harmful gases or liquids, dust, metallic particles, and vibration. A motor with the proper enclosure for the expected operating condition should be selected. Provide accessible clearance for cleaning, repair, service, and inspections (See section 3.1.3 for construction clearances). The location should be considered for possible future motor removal / handling. The free flow of air around the motor should not be obstructed.

!,<,#

7 % % ; $ %/$ ' %(* The ambient

temperatures of the air inlet to the motor should not exceed 40°C

(104°F) or be less than 30°C ( 22°F) unless the motor nameplate

specifically states an ambient temperature outside of these limits.

The ambient inside an enclosure built around the motor shall not

exceed the nameplate ambient. For ambient temperatures outside of

these limits consult the motor manufacturer.

/% * (/' % ? 6$ ? % 5 $ 6 Insulation at high temperatures ages at an accelerated rate. Each 10°C increase in temperature reduces the insulation life by one half.

5 $ 6* & G $? /( ' % ( 7 % ' %* Division 1 Hazardous Locations motors shall % be operated below ­25°C ( 13°F) ambient. (Low temperatures reduce the component mechanical properties.)

!,<,!

(%$/ % ( ' %

' %*

!,<,!,< ?$ ;;$

;

% $( are intended for use

indoors where the atmosphere is relatively clean, dry,

and non corrosive. Recommended a minimum

clearance of ½ the shaft height between vent openings

and the nearest obstruction.

!,<,!,# % % ''.

' ( ? % $( are suitable for

indoor or outdoor standard service applications.

%

%0

) motors must be

mounted in the air stream. When the motor nameplate states a

minimum airflow the motor must be mounted in an air stream

meeting this minimum value.

%

%0

motors must meet a

minimum distance of ½ the shaft height between the fan guard

grill openings and the nearest obstruction.

!,<,!,! & G $? /( ' % ( % $(* Hazardous

Locations motors are intended for installations in accordance with

NEC Article 500. For all installations involving Hazardous

Locations motors, consult the applicable national codes, local

codes, and the authority having jurisdiction.

?)

<

"

> * Use only

motors that are UL Listed and CSA Certified or UL Listed and

UL Certified for Canada. These motors bear a separate

nameplate that includes the UL Listing Mark and CSA

Certification Mark or includes the UL Listing Mark and the UL

Mark for Canada. This plate also bears the phrase: " Electric

motor for Hazardous Locations" and is marked with the Class,

Group and Operating Temperature Code.

?)

#

"

0* Use only motors that

are CSA Certified and bear the CSA Certification Mark.

These motors include a phrase on the main motor nameplate

that indicates the motor is CSA Certified for Class I, Division 2

/ Zone 2 locations.

?)

#

"

0* Use only Class II

motors as described above under "Division I Installations".

5 $ 6* H;' ( & G $? A motor should never be placed in an area with a hazardous process or where flammable gases or combustible materials may be present unless it is specifically designed and nameplated for this type of service. Hazardous Locations motors are intended for installations in accordance with NEC Article 500. For all installations involving Hazardous Locations motors, consult the NEC, local codes, and the authority having jurisdiction. Failure to follow these instructions could result in serious personal injury, death and/or property damage. (For other limitations see section 1.3)

!,# / % 6 % $*

!,#,< $ 6 ? 7 (

% ? * The motor must be securely

installed to a rigid foundation or a mounting surface to minimize

vibration and maintain alignment between the motor shaft and the

load's shaft. The mounting surfaces of the four mounting pads must

be flat within 0.01 inches for 210 frame & smaller; 0.015 inches for

250 frame & larger. [IEC 0.25 mm for 130 frame & smaller, 0.38 mm

for 160 frame & larger]. This may be accomplished by shims under

the motor feet. For special isolation mounting, contact manufacturer

for assistance

!,#,# $ 6 ? 7 ( & ' ( ' %

$ & '(

!,#,! = $% ' / % 6*

/% *

' (/$ ;$ % %

/% * Most

Dripproof rigid base (footed) motors do % meet "Dripproof"

requirements when mounted vertically. If the motor is located in

unprotected environments, the addition of a drip cover may be

available. Drip covers not available for cast iron rigid base motors.

5 $ 6* '' 6 7C % & G $? The lifting provision on standard horizontal footed motors is not designed for lifting the motor in a vertical shaft up or shaft down position. (see 2.2.1 lifting angles). Lifting method / provisions for

mounting a rigid base (footed) motor vertically is the responsibility of the installer.
= $% ' (& % ? 5 * Most standard horizontal motors thru 449 Fr. (excluding brake motors) can be mounted in a vertical shaft down orientation. For vertical brake motors see section 3.3.6.2.

= $% ' (& % /;*
5 $ 6* & G $? /( ' % ( = $% ' / %* Hazardous locations motors must % be mounted vertically shaft up without approval by the motor manufacturer. Without proper retaining provisions the rotor may move axially and contact components, creating a spark hazard.

7

$

' +-

)

0: The

following frame sizes / constructions with applied (axial) down

loads within the limit stated are acceptable when mounted vertical

shaft up.

% 1 !<7

$'

B

(- /

(3

F

?+

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56

TEFC & ODP

Steel

Yes

25 lbs

140

TEFC

Steel & Cast Iron

Yes

25 lbs

ODP

Steel

Yes

25 lbs

180

TEFC ODP

All Steel

Yes

35 lbs

Yes

35 lbs

210

TEFC ODP

All Steel

Yes

40 lbs

Yes

40 lbs

TEFC

All

Yes

40 lbs

250 ODP

Steel Cast Iron

Yes

40 lbs

No2

N/A

320 TTFC models

Cast Iron

Eng1

N/A

All Other 280 320 TEFC
ODP

Cast Iron & Aluminum
Cast Iron

Yes

30 lbs

No2

N/A

TEFC & ODP

Steel

Build Up Only4

N/A

360 & Up

TEFC
ODP TEFC &
ODP

Cast Iron Cast Iron
Steel

Build Up Only4

N/A

No2

N/A

Build Up Only4

N/A

Notes: 1 For TEFC model numbers beginning with 324TTFC or 326TTFC

consult the motor manufacturer to determine if a build up motor

is required.

2 The max applied down load is any applied load external to the

motor, including such things as sheave weight, fan loads, axial

belt force, pump load, etc. If the application is direct drive with

no applied radial load, consult the motor manufacturer.

3 "Build up only", refers to motors that are specifically ordered

and built for shaft up applications. It does not imply that all build

up motors are suitable for shaft up applications.

!,! ;;' %

(( 7'. %

% $*

/% * I/ ; % ? 6 * Do not connect or couple motor to load until correct rotational direction is established.

!,!,< 6 $ '* ;$ ; $ ' 6

% of the motor and

driven equipment minimizes vibration levels, maximizes bearing life,

and extends the overall life of the machinery. Consult the drive or

equipment manufacturer for more information.

/% * 7 $ 6 '/$ During assembly do NOT force components onto the shaft. Striking or hammering the component may result in bearing damage.

!,!,# ? $ % /;' 6* Use flexible couplings if possible.
For applications that apply radial, axial or moment loading on the motor shaft see section 3.3.3.
/% * 7 $ 6 '/$ Unless approved by the motor manufacturer do % direct couple a vertical shaft up or roller bearing motor. Direct coupling a vertical shaft up motor or a motor with a roller bearing may result in bearing damage.

!,!,! ? $ %

% ?* Radial loading for direct

connected equipment (gears, fans etc.) must be approved by the

motor manufacturer unless within the maximum overhung load limits

(Table 3 2). Combined loading (axial, radial and/or moments) must

be approved by motor manufacturer. For belted loads see section

3.3.4.

% 1 !# B

$

B

' 4-

'

1 J

$ $;

- (-

1

!

<

<#

K

143T

106

166

193

210

145T

109

170

199

218

182T

187

230

261

287

184T

193

237

273

301

213T

319

317

470

510

215T

327

320

480

533

254T

500

631

729

793

256T

510

631

736

820

284T

866

990

1100

286T

871

1005

1107

324T

950

1100

1215

326T

950

1113

1230

364T

1078

1365

1515

365T

1078

1380

1540

404T

1388

1590

1762

405T

1400

1610

1780

444T

1580

1795

2005

445T

1520

1795

1985

447T

1455

1765

1985

449T

1640

1885

2130

Values based on 26,280 hrs B 10 Life For "End of Shaft" Load multiply value by 0.88 To convert from lbf to N multiply value by 4.4482.

!,!,@ 7 '% ?*
The goal of any belted system is to efficiently transmit the required torque while minimizing the loads on the bearings and shafts of the motor and driven equipment. This can be accomplished by following four basic guidelines: 1. Use the largest practical sheave diameter. 2. Use the fewest number of belts possible. 3. Keep sheaves as close as possible to support bearings. 4. Tension the belts to the lowest tension that will still transmit the
required torque without slipping. It is normal for V belts to squeal initially when line starting a motor

!,!,@,< (- ) ?

6

*

In general, smaller sheaves produce greater shaft stress and shaft

deflection due to increased belt tension. See Table 3 3 for

recommended minimum sheave diameters. Using larger sheaves

increases the contact with belts which reduces the number of belts

required. It also increases the belt speed, resulting in higher system

efficiencies. When selecting sheaves, do not exceed the

manufacturer's recommended maximum belt speed, typically 6,500

feet per minute for cast iron sheaves. Determine belt speed by the

following formula:

4<

7 '% (; ? 9 L

!,!,@,#

17

In general, use the fewest number of belts that will transmit the

required torque without slipping. See Table 3 3 for recommended

maximum number of belts. Each belt adds to the tension in the

system, which increases load on the shafts and bearings. Belts are

most efficient when operated at or near their rated horsepower.

If the sheaves have more grooves than the number of belts required,

use the grooves closest to the motor.

!,!,@,! (- ) '
Install sheaves as close to the housing as possible to increase the bearing life of the motor and driven equipment

4#

!,!,@,@ 7 %
/% * : Belt tensioning by feel is % acceptable. Tensioning by "feel" can be very misleading, and can damage motor and equipment. It is normal for V belts to squeal initially when line starting a motor.
In general, belt tensions should be kept as loose as possible while still transmitting the required torque without slipping. Belt tensions must be measured with a belt tension gage. These inexpensive gages may be obtained through belt manufacturers, or distributors.
Proper belt tension is determined by measuring the force required to deflect the center of the belt a given distance. The proper deflection (in inches) is determined by dividing the belt span in inches by 64. Calculate the proper deflection and then see Table 3 3 for the required "Deflected Force" to achieve that deflection. After tensioning the belt, rotate the sheaves for several rotations or operate the system for a few minutes to seat belts into the grooves, then re tension the belts. New belts will stretch during use, and should be retensioned after the first eight hours of use.

% 1 !! $

(- ) ?

7 %0

1

7

?

Min Sheave Dia (in) &

<#
Belt Type

Max # of
Belts

Avg. Deflected
Force (lbs)

Min Sheave Dia (in)

<
Belt Type

Max # of
Belts

Avg. Deflected
Force (lbs)

Min Sheave Dia (in)

!
Belt Type

Max # of
Belts

Avg. Deflected
Force (lbs)

0 75

22

3VX

1

1

2.4

3VX

1

1.5

2.4

3VX

2

2

2.4

3VX

3

3

3.0

3VX

2

5

3.0

3VX

3

7.5

3.8

3VX

4

10

4.4

3VX

4

15

4.4

3VX

5

20

5.2

3VX

6

25

6.0

3VX

7

30

68

3VX

7

40

6.8

5VX

4

50

8.2

5VX

4

60

8.2

5VX

5

75

10.0

5VX

5

100

10.0

5VX

6

125

12.0

5V

7

150

13.2

5V

7

200

15.0

5V

8

250

15.0

8V

6

300

16.0

8V

7

350

16.5

8V

7

400

17.5

8V

8

450

18

8V

8

500

18.5

8V

9

600 700

800

34

22

3VX

1

22

4.0

2.2

3VX

1

3.1

3.1

2.4

3VX

2

2.1

2.8

2.4

3VX

2

2.9

3.3

2.4

3VX

3

2.9

4.0

3.0

3VX

3

3.7

4.7

3.0

3VX

4

4.1

5.4

3.8

3VX

4

4.3

5.4

4.4

3VX

4

5.4

6.0

4.4

3VX

6

4.8

5.6

4.4

3VX

7

5.2

59

52

3VX

7

53

11.6

6.0

3VX

7

6.0

14.6

6.8

3VX

8

5.9

14.1

7.4

5VX

4

13.3

14.5

8.6

5VX

4

14.3

16.0

8.6

5VX

6

13

14.1

10.5

5V

6

13.1

15.4

10.5

5V

7

13.4

16.0

13.2

5V

8

13.1

27.6

14.0

5V

9

13.8

27.1

14.0 5V9 = 11 / A

23.4

30.3

14.5 5V/ = 12 / A

26.0

29.1

15.0 5V/ = 13 /

25.7

31.6

16.0 5V/ = 14 / K

25.2

30.7

16.5 5V/ = 15 / K

26.9

17.5

8V

11

26.3

19.0

8V

12

27.3

20.0

8V

13

28.2

22

3VX

1

13

2.2

3VX

1

1.6

2.2

3VX

1

2.5

2.4

3VX

1

2.7

2.4

3VX

2

2.3

2.4

3VX

3

2.5

3.0

3VX

2

4.2

3.0

3VX

3

3.8

3.8

3VX

3

4.4

4.4

3VX

3

5.0

4.4

3VX

4

4.7

+- 7 4

!

6

- # &;

*

1. Horsepower is the nameplate motor horsepower, and RPM is the motor (driver) speed.

2. Minimum sheave diameters are from NEMA standards where applicable.

3.

)1

)

-

,

4. Selections are based on a 1.4 service factor, 5 to 1 speed ratio and various Power Transmission Manufacturers' catalogs.

5. These selections are for Narrow V belt sections only. Consult manufacturer for details on conventional V belt sections (A, B, C, D and E), or other

belt types.

6. "Average Deflected Force is per section 3.3.4.4 of this document and is the force required to deflect the center of a belt 1/64 of the belt span

distance. Tolerance on this force is ±1 lbf for forces 10 lbs, and ±2 lbs for forces >10 lbs as measured utilizing a belt tension gage.

7. When more than one belt is required the belts must be a matched set (matched for length).

8. If possible, the lower side of the belt should be the driving side to increase the length of wrap on the sheave).

9. For belted loads do not exceed 125% of 60 Hz operating RPM.

_________________________________________________________________________________________________________________________

!,!, = ? = 1

: 0? )

;$% *

5 $ 6* = ?

+ - $ %-

;

UL Recognition, UL Listing, or CSA certification does not apply to

motors that are equipped with a manual or automatic reset thermal

protector when the motor is operated on VFD power.

5 $ 6* ; +

*

Power factor correction capacitors should never be installed

between the drive and the motor.

/% * = ? 9

(*

It is the responsibility of the startup personnel during set up of the

VFD / motor system to properly tune the drive to the motor for the

specific application per the VFD user manual. The correct voltage

boost and volts per hertz settings are application dependent and

unique to each motor design. Failure to connect over temperature

devices (when provided) will void the warranty.

!,!, ,< )

1 0*

Belted loads: Do not exceed 125% of 60 Hz operating RPM.

% 1 !@ B

(

(

$;

?

'

9M N (3

#;

@ ;

56 180 [80 110]

7200

5400

210 250 [130 160]

5400

4200

280

[180]

5400

3600

320

[200]

4500

3600

360

[225]

4500

2700

400 440 [250 280]

3600

2700

>440 [>280]

3600

1800

= Fan cooled motors (Totally Enclosed & Hazardous

Locations Motors) are limited to a maximum safe

continuous speed of 4000 RPM

- 4-

-

00

!,!, ,# 1 ' 4 - * For optimum insulation life, limit VFD to motor cable lengths of general purpose motors

to Table 3 5 values. Definite purpose VFD motors may

accommodate longer cable lengths. For additional

information contact motor manufacturer.

% 1 ! B 1 ' 4- 6

;

These values are based on 3 kHz carrier frequency. Add

suitable VFD output side filters when exceeding the listed

values.

(3

#! = @ = A =

!#

600 ft.

125 ft.

40 ft.

! << 1000 ft. 225 ft.

60 ft.

#

180 m.

40 m.

12 m.

## # ,

300 m.

70 m.

18 m.

!,!, ,! = ? 6

4* Equipment grounding conductors

may be run in the same conduit as the AC motor power leads.

This wire must be used as the equipment ground for the motor and

not as the fourth current carrying wire of a "WYE" motor circuit.

The grounded metal conduit carrying the output power conductors

can provide EMI shielding, but the conduit does not provide an

adequate ground for the motor; a separate grounding conductor

must be used. Grounding the motor neutral (WYE) of a VFD

powered motor may result in a VFD ground fault trip. Improper

grounding of an inverter fed motor may result in frame voltages in

excess of 500 Volts. Refer to Grounding section 3.4.4

!,!, ,@ = ? " ( 4 ;- * /% * ( 6' ;& ( % $ '/$ *
Single Phase motors are % suitable for use on VFD power. Connecting a Single Phase Motor to a VFD voids the warranty.

!,!, , ( 0 = 4

0' *

VFD's will couple stray (common mode) voltage to motor

mounted RTDs, thermistors, thermostats and space

heaters. The leads of these elements must be properly

insulated and control input circuits must be designed to

withstand this common mode voltage.

!,!,

(( $ ( 9 ;$ = ( (*

!,!, ,< 6

* Carefully read and understand the accessory

manufacturer's instructions, supplied with motor. Contact the

manufacturer for additional information.

!,!, ,# 7 8

:

/% * =

;

78

Motors with brakes that are designed for vertical applications are

equipped with springs to support the brake pressure plate.

Mounting a horizontal brake motor vertically shaft up or down may

require a pressure plate spring modification. Failure to modify the

brake for the vertical application may result in premature brake

failure. If in question, consult brake literature or brake

manufacturer.

78 (

5 4* Do NOT connect the brake

solenoid to the output of a VFD. The brake solenoids must be

wired to 50/60 Hz line power

!,!, ,! ( &

*

Motors provided with space heaters have two leads that are

brought into the conduit box or into an auxiliary box. These leads

are marked "H1", "H2" ("H3", "H4" if a second space heater is

supplied). See the space heater nameplate on motor for heater

rating.

5 $ 6* ? = ( # H;' ( & G $? The space heater temperature rating when used in Class I, Division 2 motors shall % exceed 80% of the auto ignition temperature of the hazardous gas or vapor. See the space heater nameplate on motor for heater Temperature Code and heater rating. Failure to follow this instruction could result in serious personal injury, death and/or property damage

!,!, ,@ %-

;

*

6

* When thermal protection is provided, one of

the following will be stamped on the nameplate:

<, O%& $ ''. ;$ % % ?" This motor has built in thermal

protection. Thermal protectors open the motor circuit

electrically when the motor overheats or is overloaded. The

protector cannot be reset until the motor cools. If the

protector is automatic, it will reset itself. If the protector is

manual, disconnect motor from power supply. After protector

cools (five minutes or more) press the reset button and

reapply power to the motor. In some cases a motor is marked

"Auto" and the connection diagram on the motor will identify

T'Stat leads ­ see "2 " below. (See warnings on Manual and

Automatic reset protectors section 1.1)

#, O5 %& = $& % ;$ % % = ? = ": This motor is
provided with an overheat protective device that does not directly open the motor circuit. Motors nameplated with this phrase have either thermostats, thermisters or RTD's. The leads to these devices are routed into the motor conduit box or into an auxiliary box. The lead markings are defined on the nameplate (normally "P1", "P2") . The circuit controlled by the overheat protection device must be limited to a maximum of 600 volts and 360 volt amps. See connection decal provided inside the terminal box cover. Failure to connect these over temperature devices (when provided) will void the warranty.
5 $ 6* H;' ( & G $? For Hazardous Locations motors provided with thermostats UL and the NEC require connection of thermostat leads into the control portion of a manual reset start circuit. Failure to follow this instruction could result in serious personal injury, death and/or property damage

$

%

?

$%? * When winding

and/or bearing RTDs are provided the RTD lead markings are

defined on the nameplate. (Normally "R1", "R2", "R3" etc.)

!,!, , $%?

>% ( 4 *

Tables 3 6 & 3 7 are suggested initial RTD alarm and trip settings.

For motors found to operate significantly below these values the

settings may be reduced accordingly.

%1 !

@

B

'

5 4 $%? " % 1
7% $

%

Up to 1.0 SF

130

140

>1.0 to 1.15 SF

140

150

'

% $ <

%

155

165

160

165

% 1 ! A 7 4 $%? " %

'

@

B1

1

%

Up to 40

95

100

> 40

110

115

Bearings that are

Heat Stabilized to

130

135

150

!,!,A 6/ $?(*
5 $ 6* $ % % 6 ; $%( & G $? When devices are assembled to the motor shaft, be sure to install protective devices such as belt guards, chain guards, and shaft covers. These devices must protect against accidental contact with extremities, hair, and clothing. Consider the application and provide guarding to protect personnel. Remove all unused shaft keys and loose rotating parts to prevent them from flying off and causing bodily injury. Failure to follow this warning could result in serious personal injury, death and/or property damage.

!,@ ' %$ '

% (*

5 $ 6* ' %$ ' & G $?( Before proceeding read Section 1 1 on Electrical Safety. Failure to follow the instructions in Section 1 1 could result in serious personal injury, death and/or property damage

!,@,< ; 5 $ (/;;'. 9 7$ & $ / %

5 $ 6* ; 5 $ (/;;'.

; % 7 ' %. & G $?

Check power supply to make certain that voltage, frequency and

current carrying capacity are in accordance with the motor

nameplate. Failure to match motor nameplate values could result in

serious personal injury, death and/or property damage

5 $ 6* 7$ & $ / % (/;;'. & G $? Motor and control wiring, fusing, overload protection, disconnects, accessories and grounding must always conform to the applicable electrical codes as well as local codes and sound practices.

!,@,<,< 7 -

( 0 to a motor should include a

disconnect switch, short circuit current fuse or breaker protection,

motor starter (controller) and correctly sized thermal elements or

overload relay protection.

!,@,<,#

78

)

$0

Short Circuit Current Fuses or Breakers are for the protection of the

branch circuit. Starter or motor controller overload relays are for the

protection of the motor. Each of these should be properly sized and

installed per the applicable electrical codes as well as local codes

and practices.

5 $ 6* ;$ % % = ? = ? ( 7' ? & G $? DO NOT bypass or disable protective devices. Protection removal could result in serious personal injury, death and/or property damage

!,@,<,! ; + ( 0 '
Motors are designed to operate within the following limits at the motor terminals: 1 AC power is within +/ 10 % of rated voltage with rated frequency applied. (Verify with nameplate ratings) $ 2 AC power is within +/ 5% of rated frequency with rated voltage
$ 3 A combined variation in voltage and frequency of +/ 10% (sum of absolute values) of rated values, provided the frequency variation does not exceed +/ 5% of rated frequency. 4 For 3 phase motors the line to line full load voltage must be
balanced within 1%. 5 If the motor is rated 208 230V, the voltage deviations must be
calculated from 230V.

/% * $

;

Operation outside of these limits will degrade motor performance

and increase operating temperature.

!,@,# % $ ' 7 H*

!,@,#,<

4* For ease of connections,

motors are typically provided with large terminal boxes. Most motors

have conduit access in 90 degree increments, the terminal box

conduit opening is typically provided via knockouts, holes with

covers, or the terminal box is rotate able. Fabricated conduit boxes

may have a removable plate for the installer to provide correctly

sized hole(s).

!,@,#,# & 3

'

*

5 $ 6* H;' ( & G $?(

< %

7B

+-

: If a

pipe nipple mounted terminal box is removed or rotated it must be

reassembled with a minimum of five full threads of engagement.

#

$ ) : Do not set a terminal box component on

its machined surfaces. Prior to component reassembly wipe clean

all machined surfaces.

!

-

(

6 &3

'

%

7 B * The gap between mating surfaces with the machined

terminal box MUST BE LESS THAN 0.002 inches. This gap must

be checked with a feeler gage along the entire perimeter. If there is

visible damage to the mating surfaces, or if the gap between these

surfaces exceeds 0.002 inches, DO NOT complete the installation

and contact the motor manufacturer. Failure to follow these

instructions could result in serious personal injury, death and/or

property damage

!,@,! ' ?

%(

Electrical connections to be made per nameplate connection diagram

or separate connection plate. In making connections follow the

applicable electrical code as well as local codes and practices.

5 $ 6* ' %$ '

% & G $?

Failure to correctly connect the motor leads and grounding

conductor can result in injury or death. Motor lead connections can

short and cause damage or injury if not well secured and insulated.

!,@,!,< 5 ( 3 ( 4 ;- $ : The minimum wire size for Single Phase, 115 & 230 Volt Circuits must meet table 3 8 for a given distance between motor and either Fuse or Meter Box.

%1 !

5

<< > #! =

?

6 4 ( 3 ( 4 ;7B

<,

#,

!,

,

&; << #! << #! << #! << #!

<9@ 14 14 10 12 8 10 6 8

<9! 12 14 10 12 6 10 4 8

<9# 10 12 8 10 6 8 4 6

!9@ 10 12 6 10 4 8 2 6

< 8 10 6 8 4 6

4

< <9# 4 10 0 8

6

4

#

8

6

4

2

!

8

6

4

2

6

4

2

0

!,@,!,# B

( 4 ;-

*

Where an extension cord(s) is utilized to provide power to the

motor the extension cord(s) must be...(1) the proper gauge size

per table 3 8, (2) in good working condition (3) properly

grounded.

!,@,@ 6$ / ?

% (*

5 $ 6* ' %$ ' 6$ / ? 6 & G $? For general information on grounding (USA) refer to NEC Article 250. Improper grounding of an inverter fed motor may result in frame voltages in excess of 500 Volts. In making the ground connection, the installer must make certain that a good electrical connection is obtained between motor and grounding lead. Failure to properly ground motors, per the applicable national code (such as NEC Article 430) and local codes may cause serious injury or death to personnel.

; 0O

P6

* A grounding conductor must be

connected to the grounding terminal provided in the terminal housing.

This grounding terminal is either a ground screw, ground lug, or a

tapped hole to be used with a separately provided ground screw. The

internal grounding feature is accessible inside the terminal housing

and must be used as the primary grounding connection.

(

0O B

P6

* Some motors are provided with a

supplemental grounding terminal located on the external surface of

the motor frame or feet. This external terminal is for supplemental

bonding connections where local codes permit or require such

connection

!,@, (% $% /;*
5 $ 6* ' %$ ' (& F & G $?* Be certain that all connections are secure and the conduit box cover is fastened in place before electrical power is connected. Failure to follow these instructions could result in serious personal injury, death, and/or property damage.

5 $ 6* ' ( > $ % % 6 ; $%( & G $? Before proceeding read Section 1 2 on Mechanical Safety. Failure to follow the instructions in Section 1 2 could result in serious personal injury, death and/or property damage

5 $ 6* H (( = (/$

% ; $ %/$

& G $?

Motors with the temperature code stated on the nameplate are

designed to operate within this limit. Improper application or

operation can cause the maximum surface temperature to be

exceeded. A motor operated in a Hazardous Location that exceeds

this surface temperature limit increases the potential of igniting

hazardous materials.

(1) Motor load exceeds service factor value, (2) Ambient temperature above nameplate value, (3) Voltages outside of limits (3.4.1.3), (4) Loss of proper ventilation, (5) VFD operation exceeding motor nameplate rating, (6) Altitude above 3300 feet / 1000 meters, (7) Severe duty cycles, (8) Repeated starts, (9) Motor stall, (10) Motor reversing, and (10) Single phase operation. Failure to follow these instructions could result in serious personal injury, death and/or property damage.
/% * & % (/$ Normal motor surface temperatures may exceed 90 ° C (194° F). Touching the motor frame may cause discomfort or injury. Surface temperatures should only be measured with suitable instruments and not estimated by hand touch.

!,@, ,< ( /

';

<, - 8

* Before startup carefully read and fully

understand these instructions including all warnings, cautions

and safety notice statements.

#,

4

--

-*

Check winding insulation integrity with a Megger. If winding

resistance to ground is less than 1.5 Meg ohms consult the local

authorized service shop before energizing the motor.

!, - 8

*-

Check tightness of all

bolts and nuts. Manually rotate the motor shaft to ensure motor

shaft rotates freely. Note: Shaft & bearing seals will add drag.

Inspect all electrical connections for proper

terminations, clearance, mechanical tightness and electrical

continuity. Be sure to verify connections are made per the

nameplate connection diagram or separate connection plate.

Replace all panels and covers that were removed during

installation before energizing the motor.

@,

43

* - 8$

If practical check motor rotation before coupling to the load.

Unlock the electrical system. Momentarily provide power to

motor to verify direction of rotation. If opposite rotation is

required, lock out power before reconnecting motor. If motor has

a rotational arrow only operate the motor in the rotation

identified. Reapply power to ensure proper operation.

,$

'

5 >= 4 *

Recommend To establish a baseline value check and record

the no load amps, watts, and voltage.

!,@, ,# ( / " '

;

<, - 8

* Before startup carefully read and fully

understand these instructions including all warnings, cautions

safety notice statements.

#,

4

* Check that the connected equipment

is properly aligned and not binding. Check that all guards and

protective devices are properly installed.

!,

43

* When all personnel are clear of the

machine, apply power and verify that the load is not transmitting

excessive vibration back to the motor though the shaft or the

foundation. Verify that motor amps are within nameplate rating.

For repeated starts see 3.4.5.3. The equipment can now be

fully loaded and operated within specified limits as stated on the

nameplate.

!,@, ,! C 44 4 9 $

(

Do not start more than twice in succession under full load. Repeated starts and/or jogs of induction motors can cause overheating and immediate failure. Contact the motor manufacturer if it is necessary to repeatedly start or jog the motor.

@,

%

*

5 $ 6* & 3

'

$

& G $?*

Division 1 Hazardous Locations motors can only be modified or repaired

by the manufacturer or a facility that is Listed under UL's category

"Motors and Generators, Rebuilt for use in Hazardous Locations". Failure

to follow these instructions could result in serious personal injury, death

and/or property damage.

5 $ 6* ' %$ ' (& F & G $? Electrical connections are to be made by qualified electrical personnel in accordance with all applicable codes, ordinances and sound practices. Failure to follow these instructions could result in serious personal injury, death and/or property damage. Only qualified personnel who are familiar with the applicable national codes, local codes and sound practices should install or repair electric motors and their accessories.

5 $ 6* ' %$ ' ' = $ / % & G $? Do not touch electrically live parts. Disconnect, lockout and tag input power supply before installing or servicing motor (includes accessory devices).

@,< 6 $ ' (; %
Inspect the motor approximately every 500 hours of operation or every three months, whichever occurs first. Keep the motor clean and the ventilation and fin openings clear. The following steps should be performed at each inspection:

@,<,< = % ' % * Check that the ventilation openings and/or
exterior of the motor is free of dirt, oil, grease, water, etc, which can accumulate and block motor ventilation. If the motor is not properly ventilated, overheating can occur and cause early motor failure.

@,<,# (/' % : Use a "Megger" periodically to ensure that
the integrity of the winding insulation has been maintained. Record the Megger readings. If winding resistance to ground is less than 1.5 Meg ohms consult the local authorized service shop before re energizing the motor.

@,<,! ' %$ '

% (* Check all electrical

connectors to be sure that they are tight.

@,# '/7$ % > 7 $ 6(*
The lubricating ability of grease (over time) depends primarily on the type of grease, the size of the bearing, the speed at which the bearing operates and the severity of the operating conditions. Longer bearing life can be obtained if the listed recommendations are followed:
NOTE: If lubrication instructions are provided on the motor nameplate, the nameplate instructions will supersede these instructions. Motors marked "Permanently Lubricated" do not require additional service.

/% * 7 $ 6 9 % $ ? 6 5 $ 6 Lubricant should be added at a steady moderate pressure. If added under heavy pressure bearing shield(s) may collapse. Over greasing bearings  greatly increases bearing friction and can cause premature bearing and/or motor failure.

@,#,< 6$ ( %.;

-+ *

1%

1 + ! Q ##Q

Q

<Q

) * Recommended grease for standard service

conditions is Mobil Polyrex ® EM. Equivalent and compatible greases

include: Texaco Polystar RB, Rykon Premium #2, Pennzoil Pen 2

Lube, Chevron SRI & Mobil SHC 100.

1%

1 + ! Q ##Q ): Special low

temperature grease is recommended, such as Aeroshell 7 or Beacon

325 for ball bearings and Mobil SHC 100 for roller bearings.

1%

1 ) Q < Q ): Dow

Corning DC44 or equivalent, a special high temperature grease is

required. Note that Dow Corning DC44 grease does not mix with

other grease types.

For RTD settings see Table 3 7.

@,#,# 7 $ 6 ; $ % 6 % ; $ %/$ *
/% * & % (/$ The external surface temperature of the end shield (bracket) bearing hub may reach 100° C (212° F) during normal operation. Touching this surface may cause discomfort or injury. Surface temperatures should only be measured with suitable instruments and not estimated by hand touch.

_________________________________________________________________________________________________________________________

@,#,! '/7$ %

% $= '(*

+- 4

4)

:, @,# ' 1

) L M% 1 @< - N B M )

% 1 @#N B M

% 1 @!N

%1
( ?

@< ' 1 9M N

)&

(3

RA#

%- )

1

)

4(

" $; ( % 1 !,@

R@

R@

R!

4

,

B

R<

4( R<#

56 180 [80 110]

2500 Hrs. 4000 Hrs

5000 Hrs

6000 Hrs.

17000 Hrs.

20000 Hrs.

210 250 [130 160]

2500 Hrs

4000 Hrs

5000 Hrs.

12000 Hrs.

16000 Hrs.

280

[180]

2000 Hrs

3000 Hrs

4000 Hrs.

10000 Hrs.

14000 Hrs.

320

[200]

2000 Hrs

3000 Hrs.

9000 Hrs.

12000 Hrs.

360

[225]

1500 Hrs

2000 Hrs.

8000 Hrs.

10000 Hrs.

400 440 [250 ­ 280] >440 [>280]

1500 Hrs. 1000 Hrs.

4000 Hrs. 3000 Hrs.

7000 Hrs. 5000 Hrs.

( ) * If motor remains idle for more than six months, Lubricate at the beginning of the season, then follow lubrication interval.

B

B

4

% 1 !@+ -

D

)

% 1 @# ( )

/ - 4-

)

() 0

()

: Maximum Ambient Temperature and Contamination are independent factors

B

1

%

-

Standard Severe Extreme

Less than 40° C (104° F)

Clean, Slight Corrosion, indoors, less than 16 hrs per day

1.0

Above 40° C (104° F) to 50° Moderate dirt or Corrosion or outdoors or more than 16 hrs

C

per day

0.5

Greater than 50° C or Class H Insulation

Severe dirt or Abrasive dust or Corrosion

0.2

________________________________________________________________________________________________________________________

% 1 @!

Angular Contact or Roller Bearing

0.5

Vertical Motor

0.5

All others

1.0

%1

@@$ 1

(3

=

,,

3

48 56

80

0.25

0.14

4.0

143 145 90

0.25

0.14

4.0

182 184 110

0.50

0.28

8.0

213 215 130

0.75

0.42

12.5

254 256 160

1.00

0.55

16.0

284 286 180

1.50

0.83

25.0

324 326 200

2.00

1.11

33.0

364 365 225

3.00

1.66

50.0

404 405 250

3.80

2.11

62.0

444 449 280

4.10

2.27

67.0

>449 >280

4.50

2.50

74.0

For regreasing while operating multiply volume by 125%.

________________________________________________________________________________________________________________________

@,#,@ '/7$ % ;$ ?/$ *

+ -$ 4

4; )

/% * 7 $ 6 ? 6 5 $ 6 Added grease must be compatible with the original equipment's grease. If a grease other than those stated in 4.2.1 is to be utilized contact the motor manufacturer. Nameplate information supersedes section 4.2.1 (GREASE TYPE). New grease must be free of dirt. Failure to follow these instructions and procedure below may result in bearing and/or motor damage.

For an extremely dirty environment, contact the motor manufacturer for additional information.

'/7$ % ;$ ?/$ *
<, Clean the grease inlet plug or zerk fittings prior to regreasing. #, (If present) Remove grease drain plug and clear outlet hole
blockage.

/% * 6$ ( ?$ ;'/66 ?* Old grease may completely block the drain opening and must be mechanically removed prior to regreasing. Forcing a blocked drain open by increased greasing pressure may collapse bearing shields and / or force excess grease through the bearings and into the motor. !, Add grease per Table 4 4 @, Re install grease inlet and drain plugs (if removed).
5 $ 6* H;' ( & G $? ? % energize a Hazardous Locations motor without all grease fittings properly installed.

@,#, H ;' * '/7$ %
Assume NEMA 286T (IEC 180), 1750 RPM Vertical motor driving an exhaust fan in an ambient temperature of 43° C and the atmosphere is moderately corrosive.

<, Table 4 1 list 10,000 hours for standard conditions.

#, Table 4 2 classifies severity of service as "Severe" with a

multiplier of 0.5.

!, Table 4 3 lists a multiplier value of 0.5 for "Vertical"

@, (Eq. 4.2) Interval = 10,000 hrs x 0.5 x 0.5 = 2500 hrs

3

Table 4 4 shows that 1.5 in of grease is to be added.

!

$1

) 0#

-

) + - <,

4

,

@,! %$ /7' (& % 6

5 $ 6* $ ? (%$/ % (* Before trouble shooting a motor, carefully read and fully understand the warnings, cautions safety notice statements in this manual.

5 $ 6* & 3

'

$*

Motors nameplated for use in Division 1 Hazardous Locations can

only be disassembled, modified or repaired by the plant of

manufacturer or a facility that is Listed under UL's category "Motors

and Generators, Rebuilt for use in Hazardous Locations". Failure to

follow these instructions could result in serious personal injury,

death and/or property damage

/% * ? ( (( 7'. ;;$ = ' $ I/ $ ?*

Motor disassembly must be performed by a party approved by the

motor manufacturer. To disassemble the motor without approval

voids the warranty.

@,!,< 6 $ ' %$ /7' (& % 6 5 $ 6(

<, ? (

% ; 5 $ % %&

%$ 7 $

; $ $ 6 ( $=

$

%

,

#, ? - 4

1

)4

,

!, + 0 8 -

- 4 +0

)4

,

@, 7

:

04

1

4:

,

,

-1

-

,

@,!,#

%1 - 4

* '8 0

*

9

)

%1 @

)

*

*

,

Supply voltage is too low or is severely unbalanced (one (1) Check power supply fuses (2) Match motor lead wiring to nameplate connection

phase is low or missing).

diagram and supply voltage (3) Ensure that steady state supply voltage at motor

terminals is within limits (see section 3.4.1.3). Correct as needed (4) Obtain correct

7, Motor leads are miswired at conduit box.

motor to match actual supply voltage.

, Driven load exceeds motor capacity ?, Load is jammed.
, Fan guard is bent and making contact with fan

(1) Verify that motor & load turn freely (2) Disconnect motor from load & ensure motor turns freely. Note: Roller bearings make noise when motor is uncoupled and shaft is rotated (3) Verify that motor starts when disconnected from load (4) Remove excessive / binding load if present.
Replace fan guard & fan (if blades are damaged)

, VFD with power factor capacitors installed

Remove power factor correction capacitors if equipped

6, VFD with motor neutral lead grounded &, VFD programmed incorrectly

Ensure that motor neutral lead is ungrounded
(1) Repeat checks listed above (2) Verify that VFD current limit and starting boost are set correctly (5) Double check motor and feedback parameter settings and VFD permissives (6) Repeat autotune (for vector drives) procedure (7) Consult VFD supplier.

-1

4-

++

*

(1) Replace fuse or reset circuit breaker. Allow motor to cool down before resetting

,

Supply voltage unbalanced

has

drooped

or

has

become

severely

manual protector on motor. 5 4 See section reset protector warnings (2) Verify that rated and

1.1 for automatic balanced supply

and manual voltage has

been restored before restarting motor. Measure voltage during restart. Ensure that

steady state supply voltage at motor terminals is within limits (see section 3.4.1.3).

7, Motor is overloaded , Motor bearings are seized
?, Load Is jammed.

, VFD will not restart motor after tripping

, Capacitor failure on single phase motor (if equipped)

8

4

*

(1) Verify that motor & load turn freely. Repair binding components as needed (2) Reduce driven load to match motor capacity or increase motor size to match load requirements.

(1) Check fault codes on VFD and follow VFD troubleshooting procedures (2) Verify that VFD input voltage is balanced and within limits (3) Remove excessive mechanical load if present.

5 4* ;

(- 8 & 3 : Contact service shop to check capacitor.

, Motor leads are not connected correctly

Match motor lead wiring to nameplate diagram.

7,

Supply voltage unbalanced.

has

drooped

or

become

severely

(1) Ensure that steady state supply voltage at motor terminals is within limits (see section 3.4.1.3). Correct as needed (2) Obtain correct motor to match actual supply

voltage.

, Load exceeds motor capability

Determine correct motor size and contact motor representative to obtain replacement motor.

?, Faulty start capacitor (Single Phase)

Motor may be too small for load. Record acceleration time. Start capacitors may fail if acceleration time exceeds 3 seconds.

, Mechanical Failure
-+ 4

, Incorrect wiring connection at motor

)-

)

(1) Check to make sure motor & load turn freely (2) Disconnect motor from load & ensure motor turns freely

*

[Single Phase] Reconnect motor according to wiring schematic provided. Some motors are non reversible
[Three Phase] Interchange any two power supply (phase) leads.

Note:

0

, Driven Load is excessive
7, Ambient temperature too high , Motor cooling fins and/or vent openings blocked
?, Insufficient Air Flow

(1) If motor current exceeds nameplate value, ensure that driven load has not increased. Correct as needed. (2) If new motor is a replacement, verify that the rating is the same as the old motor. If previous motor was a special design, a general purpose motor may not have the correct performance.
Most motors are designed to operate in an ambient up to 40 C. (See section 4.2.2 Hot Surface Caution)
Remove foreign materials ­ clear vent openings, fan guard air inlets and frame fins (TEFC motors)
TEAO (Totally Enclosed Air Over) motors: Measure airflow next to motor surface and obtain minimum requirements from motor manufacturer.

, Motor is started too frequently , Supply voltage too low, too high, or unbalanced
=1
, Motor misaligned to load. 7, Load out of balance (Direct drive application)
, Uneven tension on multiple belts

See section 3.4.5.3
(1) Ensure that steady state supply voltage at motor terminals is within limits (see section 3.4.1.3) Correct as needed (2) Reconnect motor per input voltage (3) Obtain correct motor to match power supply.
Realign load (1) Ensure that load is dynamically balanced: (2) Remove motor from load and inspect motor by itself. Verify that motor shaft is not bent. Rule of thumb is 0.002" runout for shafts extension lengths up to 3.00". Add 0.0005" per every additional inch of shaft length beyond 3.00". Mixing new with used belts. Replace multiple belt applications with a complete set of matched belts.

(1) De energize motor and record vibration as load coasts from 100% speed to 0

RPM. If vibration drops immediately, vibration source is electrical. If levels do not

?,

Driven load operating at resonant point / natural drop immediately, source is mechanical (2) Redesign system to operate below the

frequency.

resonant point (3) On VFD driven loads, program skip frequencies to bypass

resonant points (4) Increase carrier frequency to obtain <3% THD current (5) On

variable torque loads reduce volts/hertz below base speed.

, VFD torque pulsations , Motor miswired at terminal box 6, Uneven, weak or loose mounting support. &, Motor bearings defective
, Motor out of balance

(1) Adjust VFD to obtain <3% THD current @ rated motor current (2) Adjust VFD stability for smooth operation. Vector drives may be unstable at light load.
Match motor lead wiring to nameplate connection diagram.
Shim, strengthen or tighten where required.
Test motor by itself. If bearings are bad, you will hear noise or feel roughness. Roller bearings are normally noisy when operated without load. If sleeve bearing, add oil per nameplate instructions. For motors with regreasing provisions, add grease per relubricating instructions (see section 4.2.3). If noise persists contact warranty service.
Disconnect from load. Set motor on rubber pads on solid floor. Secure a ½ height key in shaft keyway and energize from balanced power supply @ rated voltage. Record vibration levels and compare with appropriate standards. If excessive vibration persists contact motor manufacturer.

74

0,

, Load to motor may be excessive or unbalanced
7, Bearings contaminated. , Incorrect grease or bearings for ambient extremes.
?, VFD bearing damage

(1) If belt drive check system per section 3.3.4. (2) Other than belting, check loading on motor shaft. An unbalanced load will also cause the bearings to fail. (3) Check runouts of mating components, such as a C face and pump flange.
Motor enclosure not suitable for environment. Replace with correct enclosure construction
See section 4.2.1
Ground brush, common mode filter, or insulated bearings must be added. Contact motor manufacturer.

8

11 4 4

4:

4

,

, Contact between rotating and stationary components

Belt squeal during across the line starting is normal: (1) Verify that supply voltage is within limits (see section 3.4.1.3). (2) Ensure that motor lead wiring matches nameplate connection diagram: (3) Isolate motor from load. (4) To locate point of contact turn motor shaft by hand. (5) If point of contact is not located contact motor service shop.

(

0,

, The motor acceleration time is too long

7, Motor is being started too frequently

, Motor voltage low ?, Defective start switch inside motor

$

,

Motor may be too small for load. Record acceleration time. Start capacitors may fail if acceleration time exceeds 3 seconds.
Excessive starting will damage motor capacitors. Contact motor manufacturer if motor is started more than 20 times/hour or if acceleration time exceeds 3 seconds.
Verify that voltage at the motor terminals is within limits (see section 3.4.1.3).
Motor internal switch failure overheats start capacitor. Contact service shop or motor manufacturer.

, High ambient temperature

Verify that the ambient does not exceed motor's nameplate value

7, Input voltage exceeds limit

Verify that voltage to the motor terminals is within limits (see section 3.4.1.3).

,

Power surge to motor (caused high transient voltage).

by

lightning

strike

or

other

If

a

common

problem,

install

surge

protector.



References

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