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- 3. • A Triac is a high-speed solid-state device that
can switch and control AC power in both
directions of a sinusoidal waveform
- 4. 4 possible triggering modes of operation
1) Ι + Mode = MT2 current positive (+ve), Gate current positive
(+ve)
2) Ι – Mode = MT2 current positive (+ve), Gate current negative
(-ve)
3) ΙΙΙ + Mode = MT2 current negative (-ve), Gate current
positive (+ve)
4) ΙΙΙ – Mode = MT2 current negative (-ve), Gate current
negative (-ve)