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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
0
1
2
3
4
5
6
7
8
9
10
Time (seconds)
0
20
40
60
80
100
120
% LRA
CTV-PRB004.book Page 18 Sunday, December 18, 2011 6:39 PM
