POWERLINKER TRAINING CENTER

MODULE: Operation And Maintenance Of HT and LT Motors ( O&M 3 )

COURSE DESCRIPTION:

Introduction: Types of motors; Equivalent circuits; Speed – Torque characteristics; DOL, Star-Delta; Temperature rise and
duty cycle ( type S1 to S6), Degree of protection.

Protection: HT Motors – Thermal, Stalling, Instantaneous, Negative sequence and Ground fault protection. LT Motors – Bimetal, Fuse; Setting of Bimetal; Fuse – Relay co-ordination problem.

Testing: Routine maintenance test; Winding resistance, IR, PI, Dielectric Absorption, High- Pot; tan d.

Condition Monitoring: IR, PI, Thermo graphic, Vibration analysis.