Power and ElectricalHigh and Medium Voltage Motors: Testing, Maintenance and Protection
Large motors drive the equipment whose failure stops a plant, and their windings fail in ways that give warning to anybody testing for it. This course covers that testing. Delegates work through construction and the insulation systems used at these voltages, starting methods and their thermal consequences, and the diagnostic tests that reveal condition: insulation resistance and polarisation index, partial discharge, surge comparison and winding resistance. Protection receives full treatment, including thermal, differential, earth fault and locked rotor functions and the settings that follow from the motor's own thermal limits. The course closes on refurbishment decisions and interpreting a failed winding.
Course objectives
- Describe construction and insulation systems at these voltages
- Assess starting methods and their thermal consequences
- Carry out insulation resistance and polarisation index testing
- Apply partial discharge, surge comparison and winding resistance testing
- Set thermal, differential, earth fault and locked rotor protection
- Derive settings from the motor's own thermal limits
- Interpret a failed winding and decide on refurbishment
Who should attend
- Electrical maintenance and reliability engineers
- Protection engineers
- Testing technicians
- Plant engineers responsible for large drives
- Motor repair and refurbishment staff
Course outline
- 01Construction and insulation at high and medium voltage
- 02Starting methods and thermal consequences
- 03Insulation resistance and polarisation index
- 04Partial discharge testing
- 05Surge comparison and winding resistance
- 06Protection functions for large motors
- 07Deriving settings from thermal limits
- 08Failed windings, refurbishment and replacement
Scheduled sessions
| Dates | Venue | Format | Price | Register |
|---|---|---|---|---|
| 28 December 2026 to 1 January 2027 | Addis Ababa, Ethiopia | Classroom | USD 1,325 per delegate | Register Now |
| 18 to 22 January 2027 | Maseru, Lesotho | Classroom | R19,950 per delegate | Register Now |
| 15 to 19 March 2027 | Online | Online | R8,500 per delegate | Register Now |