Proactive Technical Training Limited (PTT)
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Introduction to Three Phase and Fault Finding Training Courses
This 2-day course is open to anyone wishing to improve their 3-phase knowledge and testing skills. It is also aimed at students wishing to improve their 3-phase knowledge prior to taking the City and Guilds 2391.
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Theory of 3-phase distribution
- Generation
- 6 wire – 3 wire
- Phase relationship
- Relationship between U and Uo
- Voltage/current/power relationships
UK sub-station
- Supply voltages
- Relationship with earth
- Line and Neutral
Cable core identification
- Colour
- Numbers
- Letters
3-phase distribution boards
- Isolation
- Bus bar arrangement
- Ferromagnetic effects
- Circuit numbering
3-wire and 4 wire arrangements
- Unbalanced loads
- Balanced loads
Power FactorMotors
- Type B/C/D circuit breakers
- Fuses
- Overload calculations for wiring
- Overload protection for motor
- Star/Delta starting arrangements
- DOL starting arrangements
- Soft Starting arrangements
Testing 3-phase circuits and recording the results
- Continuity
- Insulation Resistance
- Ze
- PFC
- RCD
- Functional
- Fault finding