Kohler KSS - Page 48

TP-6461 1/0848 Section 3 Transfer Switch Troubleshooting
AC
LS
A2
B2
CC
AC
--
AX
LS
BX
A1
B1
AC
AC
BTS2
SC
AC
+
SI
--
BT2 AT2
ATS2
TC
AC
+
SI
--
BTS1ATS 1
AT1
BT1
NC
NR
NA
+
SI
AC
LS
A2
B2
CC
AC
+
SI
--
AX
LS
BX
A1
B1
AC
AC
BTS2
SC
AC
+
SI
--
BT2 AT2
ATS2
TC
AC
+
SI
--
BTS1ATS 1
AT1
BT1
NC
NR1
NA
Emergency to OFF
NR1 is pulsed for
250 ms to energize
trip coil TC.
BTS1 and BTS2:
Closed in Emergency
Open in OFF
OFFtoNormal
NR is pulsed for 250 ms to
energize closing coil CC.
AX is closed in OFF.
Figure 3-7 Model KSP Programmed-Transition Switches, Transfer from Emergency to Normal