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Entry type: Application example Entry ID: 24499345, Entry date: 01/19/2007
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Star-delta (Wye-delta) Switching of Three-phase Induction Motors. CD-FE-III-001-V10_EN

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Task:
When switching from a star (wye) circuit to a delta circuit, transients can occur in the motor, which, further intensified by an unfavorable constellation of line frequency and inductor field, lead to the development of very large current peaks.

Solution:
These types of overvoltages can be avoided through the use of correct motor terminal board wiring by implementing the preferred circuitry configuration.

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Documentation (English)  CD_FE_III_001_EN.pdf ( 553 KB )
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