ABB MT series User Manual

Installation, operation, maintenance and safety manual .......................................................................................... EN 3
Montage-, Betriebs-, Wartungs- und Sicherheitsanleitung .................................................................................... DE 21
Manuel d’installation, d’exploitation, de maintenance et de sécurité ..................................................................... FR 39
Manual de instalación, funcionamiento, mantenimiento y seguridad ..................................................................... ES 59
Manuale d’installazione, funzionamento e manutenzione ........................................................................................ IT 79
Manual de instalação, operação, manutenção e segurança ...................................................................................PT 99
Installations-, driffts-, underhålls- och säkerhetsmanual ..................................................................................... SV 119
Asennus-, käyttö-, kunnossapito- ja turvallisuusohje ............................................................................................ FI 137
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Low voltage motors
Manual

ABB MT series Specifications

General

Brand	ABB
Model	MT series
Category	Engine
Language	English

Summary

Handling

Installation and commissioning

Insulation resistance check

Measure insulation resistance before commissioning and if dampness is suspected.

Mounting and alignment of the motor

Ensure adequate airflow. Correct alignment prevents bearing, vibration, and shaft failures.

Cabling and electrical connections

Operation

Safety considerations

Intended for qualified personnel. Use necessary safety equipment according to local regulations.

Low voltage motors in variable speed operation

Winding insulation

Higher voltage stresses occur with VSDs. Dimension winding insulation and filters accordingly.

Selection of winding insulation for ACS800 and ACS550 converters

Guide to selecting winding insulation and filters for ACS800/ACS550 converters based on voltage and cable length.

Selection of winding insulation with all other converters

Bearing currents

Use insulated bearings, filters, and grounding methods to prevent harmful bearing currents.

Elimination of bearing currents with ABB ACS800 and ACS550 converters

Methods to avoid bearing currents in motors with ABB ACS800/ACS550 converters with diode supply.

Elimination of bearing currents with all other converters

Cabling, grounding and EMC

Use shielded cables and EMC glands for 360° bonding. Ensure proper grounding for EMC compliance.

Dimensioning the motor for variable speed application

Dimension motors using ABB's DriveSize program or manually for other converters.

Dimensioning with ABB ACS800 converters with DTC control

Loadability curves for ACS800 converters with DTC show output torque versus frequency.

Dimensioning with ABB ACS550 converters

Loadability curves for ACS550 converters show output torque as a function of supply frequency.

Dimensioning with other voltage source PWM-type converters

Maintenance

General inspection

Lubrication

Lubrication intervals are based on the L₁-principle for reliability. Consult ABB for specific needs.

Lubrication intervals and amounts

Lubricants

Recommended greases: Esso Unirex N2/N3, Mobilith SHC 100. Do not mix different grease types.

Troubleshooting

Motor fails to start

Troubleshoot motor start failure: check fuses, overload trips, power supply, and connections.

Motor stalls

Troubleshoot motor stalling: check overload, phase loss, mechanical issues, or incorrect application.

Motor runs and then dies down

Troubleshoot motor shutdown: check power failure, low voltage, or open circuit issues.

Motor does not come up to nominal speed

Troubleshoot speed issues: check voltage, line drop, starting load, or connections.

Motor takes too long to accelerate and/or draws high current

Motor overheats while running

Troubleshoot overheating: check ventilation, dirt, open phase, coil faults, or alignment.

Motor vibrates

Scraping noise

Noisy operation

Hot bearings