Emerson 986269, LARGE AC ELECTRIC MOTORS manual XIV Troubleshooting Possible Cause Correction

Page 21

U.S. ELECTRICAL MOTORS INSTALLATION AND MAINTENANCE

Troubleshooting

XIV.

TROUBLESHOOTING

 

 

 

 

 

 

 

TROUBLE

POSSIBLE CAUSE

CORRECTION

Motor will not start

Does not rotate. Usually line trouble

Check source of power supply. See

 

 

single phasing at starter.

Safety instructions! Check overloads,

 

 

 

controls and fuses. Check voltage,

 

 

 

compare with nameplate voltage.

 

 

 

 

 

 

Rotates but does not come up to

Disconnect motor from load to verify if

 

 

speed. Load too heavy.

motor starts without load. Reduce

 

 

 

load-or replace motor with motor of

 

 

 

greater load capacity.

Excessive motor humming

High voltage

Check input voltage and proper motor

 

 

 

lead connection.

Noise

 

Unbalanced rotor

Balance rotor assembly.

Clicking

 

Contaminants in air gap

Remove rotor assembly and clean

 

 

 

motor.

Rapid knocking

Bad bearing; contaminated grease

Replace bearing and regrease per

 

 

 

lubrication section.

Vibration

Misalignment in coupling or feet

Realign motor per initial installation

 

 

 

section.

 

 

 

 

 

 

Vibration in driven equipment

Disconnect motor from driven equip-

 

 

 

ment. See section on safety. Run

 

 

 

motor unconnected and check vibra-

 

 

 

tion. If vibration drops dramatically,

 

 

 

then the driven equipment or align-

 

 

 

ment may be the cause of vibration.

 

 

 

 

 

 

Ambient Vibration

Check base vibration level with motor

 

 

 

stopped.

 

 

 

 

 

 

System natural frequency (resonance)

Revise rigidity of motor base structure.

Vibration

Rotor out of balance; balance weights

Balance rotor assembly.

"following motor repair"

or fans shifted on rotor.

 

Fine dust under coupling with rubber

Misalignment

Realign couplings, inspect couplings.

buffers or pins

 

See initial installation section.

Bearing overheating

Misalignment

Realign unit. See initial installation

 

 

 

section.

 

 

 

 

 

 

Excessive tension in belt drive

Reduce belt tension.

 

 

 

 

 

 

Excessive end thrust

Reduce thrust from driven machine.

 

 

 

Recheck alignment. See initial

 

 

 

installation section.

 

 

 

 

 

 

Too much grease in bearing

Relieve bearing cavity of grease to

 

 

 

level specified in lubrication section.

16

Page 20 Page 22
Image 21
Page 20 Page 22
Contents Titan Page Safety First SafetyTable of Contents Page II. Handling ShipmentIII. Storage StorageStorage Storage Installation Location Installation Location FoundationFoundation GroutingInitial Installation Initial InstallationFlexible Couplings Angular MisalignmentParallel Alignment Operated uncoupled from driven equipment NO-LOAD Vibration Limits Normal OperationVelocity, Inches per second Speed, RPMDoweling Normal OperationVIII. Doweling Disassembly Reassembly IX. DisassemblyReassembly Dowel PIN Holes XI. Lubrication LubricationManufacturer Description Electrical Motors XII. Renewal Parts and Service Renewal Parts ServiceRecommended Fastener Torque Values Fastener Size Torque* Ft.- LbsXIII. Cutawaydrawings Cutaway DrawingsXIV Troubleshooting Possible Cause Correction TroubleshootingTrouble Possible Cause Correction Record Installation Record

986269, LARGE AC ELECTRIC MOTORS specifications

Emerson Large AC Electric Motors, specifically model 986269, exemplify cutting-edge technology and exceptional design, catering to the diverse needs of industrial applications. These motors are engineered for reliability, efficiency, and performance, making them suitable for various sectors, including manufacturing, mining, and oil and gas.

One of the standout features of the Emerson 986269 motor is its robust construction. Built to withstand harsh operational environments, this motor has a durable housing that protects it from external contaminants such as dust, moisture, and chemicals, thereby prolonging its lifespan. The design promotes efficient heat dissipation, which minimizes overheating risks and enhances both performance and reliability.

Energy efficiency is a critical aspect of the Emerson 986269 AC electric motor. Utilizing advanced design methodologies, the motor offers high efficiency ratings, which translates into lower operational costs and reduced carbon footprints. It meets or exceeds the latest efficiency standards, making it an eco-friendly choice while ensuring optimal performance in various applications.

Another significant feature is its versatility. The Emerson 986269 motor is available in various sizes and configurations, making it suitable for different tasks and load requirements. Its adaptability allows seamless integration into existing systems, making it a valuable asset for businesses looking to upgrade their machinery without extensive modifications.

The motor employs state-of-the-art technologies such as premium-quality bearings and insulation systems, contributing to its quiet operation and minimal maintenance requirements. This means reduced downtime and increased productivity, both vital for maintaining competitive advantages in today's fast-paced industrial landscape.

Moreover, Emerson's commitment to safety is reflected in the design of the 986269 motor. It is equipped with advanced thermal protection features and complies with international safety standards, ensuring secure operation even in challenging conditions.

In conclusion, the Emerson Large AC Electric Motor 986269 sets the benchmark for performance, reliability, and efficiency in industrial applications. With its robust construction, energy-efficient design, and advanced technologies, it is an investment that promises long-term operational benefits and peace of mind for users. Whether for heavy-duty tasks or general industrial use, this motor remains a top choice for companies aiming to enhance their operational efficiency and productivity.
Top Page Image Contents