Specifications

February 2007
CA08101001E For more information visit: www.eaton.com
16-37
Transfer Switches
16
Transfer Switch Equipment
ATC-800 Closed Transition IQ Transfer Controller
In-Phase Transfer
Feature Set 47D Closed Only
CTIQ (ATC-800) Transfer controllers
equipped with Feature Set 47D only
transfer to an alternate source when
both sources are synchronized. For
synchronization to occur, both voltage
and frequency differentials must fall
within the user selectable ranges. If
synchronization does not occur (within
a pre-selected amount of time) the
controller will maintain load connec-
tion to the current power source and
initiate an alarm.
Figure 16-19. Feature Set 47D Schematic
Table 16-42. Closed Transition Standard Features
Standard
Features
Customer
Adjustments
Closed Transition Frequency Difference (Hz)
Closed Transition Voltage Difference
Closed Transition Synchronization Timer
0.0 to 0.3 Hz
1 to 5%
1 to 60 Minutes
Request for Transfer
Alternate
Source
Available?
Sources
Synchronized
<Tmax
Source 1 Open
<100 msec?
Close Source 2
Open Source 1
Detect Source 2 Closed
Good
Open Source 2
Alarm
Alarm
End End
Yes
Yes
Yes
No
No
No
Closed
Transition