Instructional Booklet
Page
24
Effective: July 2010
ATC-100 Contactor Based Transfer Switch
For more information visit: www.eaton.com
IB01602017E
Figure 19. Utility - Generator Transfer Switch.
In-Phase Transition Implementation (only for 2-position and 3 position contactor type ATS)
Utility i
s
a
v
a
il
ab
le
Clo
s
e Utility
s
witching device
(Momentarily energize K1)
Utility is powering the load
Receive req
u
e
s
t to tr
a
n
s
fer to Gener
a
tor
(
S
y
s
tem Te
s
t, Gener
a
tor Te
s
t)
TDE
S
timer time
s
o
u
t
S
end "Engine
S
t
a
rt"
s
ign
a
l
(Energize Gen Start relay)
I
s
Gener
a
tor
Av
a
il
ab
le?
TDNE timer time
s
o
u
t
S
ync timer time
s
o
u
t
Open Utility
S
witching Device
a
nd
Clo
s
e Gener
a
tor
S
witching Device
(Momentarily energizes K2)
Generator is powering the load
Ye
s
No
S
o
u
rce
s
s
ynchronized
b
efore
S
ync timer
Time
s
o
u
t
Ye
s
No
Open Utility
S
witching Device
(Momentarily energizes K2)
TDN timer time
s
o
u
t
(if enabled for 3-position
contactor type ATS)
Clo
s
e Gener
a
tor
S
witching Device
(Momentarily energizes K2)
*
In-Phase Transition Implementation (only for 2-position and 3 position contactor type ATS)
(Continued on next page)
