Low Voltage-Wye-Delta; Wye-Delta Starters - Trane Starters Engineering Bulletin

Low-Voltage Starter Types
Figure 6. Comparison of low-voltage starting current
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
18
120
100
80
60
40
20
0
0 1 2 3 4 5
Time (seconds)
Figure 7, p. 19 and its "Starting sequence, " p.
X-Line
Solid-State
Wye-Delta
AFD
6 7 8 9
19.
CTV-PRB004-EN
10