Starters for three phase induction motors:
For starting of 3-φ induction
motor, we need Y-∆ (star – delta) starter. These starters are useful for safe
running of induction motor by applying 1/√3 times of voltage in Y- mode for safety of
induction motor. When motor gets 80% of speed we apply full voltage Vph=VL
in ∆ mode; during this time sufficient back e.mf is developed to limit the
input current.
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