18 CTV-PRB004-EN
Low-Voltage Starter Types
Low Voltage—Wye-Delta
Wye-Delta Starters
One of the most common starters in the industry is the wye/star-delta. It is an electromechanical
starter initially set up in a “wye” or “star” configuration, then it transitions to a “delta”
configuration during the starting sequence.To illustrate a typical starting sequence using a generic
(non-Trane) schematic, refer to Figure 7, p. 19 and its “Starting sequence,” p. 19.
Figure 6. Comparison of low-voltage starting current
X-Line
Solid-State
Wye-Delta
AFD
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10
Time (seconds)
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80
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% LRA
CTV-PRB004.book Page 18 Sunday, December 18, 2011 6:39 PM
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