Trane RTHD

L2
L3
1K1
1K1
1K2
1K2
1K4
1K4
1K4
R
R
R
1K2
1K3
1K3
L1
De-energize 1K1 and
Energize Shorting
Contactor (1K3).
Power Flow
Check for No Current
(Starter Fault type II)
1 Second.
1K3 Remains Closed.
1K1
L2
L3
1K1
1K1
1K1
1K2
1K2
1K4
1K4
1K4
R
R
R
1K2
1K3
1K3
L1
Power Flow
Shorting Contactor (1K3)
continues energized.
Energize Start Contactor
(1K1).
RLC-SVD05A-EN 37
Starter
Figure 17.Y-Delta Starter Sequence
Figure 18.Y-Delta Starter Sequence