IB140042EN For more information visit: www.eaton.com
Instructional Booklet
Effective: May 2015 Page 5
ATC-300/900 Breaker Based Transfer Switch
1.3 ATS Catalog Number Identification
Transfer switch equipment catalog numbers provide a significant
amount of relevant information that pertains to a particular piece
of equipment. The Catalog Number Identification Table (Table 2)
provides the required interpretation information. An example is
offered here to initially simplify the process.
Example: Catalog Number (circled numbers correspond to position
headings in Table 2):
1 to 2 3 4 5 to 6 7 8 9 to 12 13 14 15
AT V 3 KD A 2 0225 W R U
The catalog number ATV3KDA20225WRU describes an ATS with
the switching devices mounted vertically in the enclosure. The
intelligence represented by the control panel is the ATC-300+.
The Eaton Series C Type HKD is used as the switching device and
is in the form of a 2-pole molded case switch on each source. The
continuous current rating of this equipment is 225 A and applica-
ble at 240 Vac, 60 Hz. The transfer switch equipment is enclosed
in a NEMA 3R enclosure and is listed for UL applications.
Table 2. Transfer Switch Catalog Number Explanation
Notes: 1 Vertical orientation (225-1200 A)
2 Horizontal orientation (30-150 A)
3 Consult factory for availability.
*CSA will only be applied to molded case switches, both
power sources.
1.4 Environmental Conditions
1.4.1 Seismic
With proper installation, and by including the appropriate optional
feature that includes specially designed cleats (optional feature
#42), the ATSs have a seismic capability which exceeds the worst
case Zone 4 required levels, per both the Uniform Building Code
and the California Building Code.
1.4.2 Operational Conditions
Normally, an ATS is applied indoors in an electrical equipment
room. In the appropriate enclosure, it can be used for outdoor
applications were the equipment is subject to falling rain, freezing
temperatures, and no greater than 90% humidity (non-condens-
ing). The ambient temperature range for operation is between -20
and 70°C (-4 to 158°F).
POSITIONS 1 TO 2 POSITION 3 POSITION 4 POSITIONS 5 TO 6
BASIC
DEVICE
SWITCHING DEVICE
ORIENTATION
CONTROL
PANEL
SWITCHING
DEVICE
Automatic Transfer Switch AT Vertical V
1
Horizontal H
2
ATC-300+
ATC-900
Controller
3
9
HFD
HKD
HLD
HMDL
NB
HND
3
Eaton Series C
Eaton Series C
Eaton Series C
Eaton
Eaton
Eaton Series C
FD
KD
LD
MD
NB
ND
POSITION 7 POSITION 8 POSITIONS 9 TO 12 POSITION 13 POSITION 14 POSITION 15
SWITCHING DEVICE
ARRANGEMENT
NUMBER
OF POLES
AMPERE
RATING
VOLTAGE/
FREQUENCY ENCLOSURE LISTING
Fixed Mount Molded Case A Two 2 30 A – 0030 600 Vac/60 Hz E Type 12 J *UL/CSA Listing U
Switches Both Power Sources Three 3 70 A – 0070 480 Vac/60 Hz X Type 3R R No Listing X
Fixed Mount Molded Case B Four 4 100 A – 0100 240 Vac/60 Hz W Open K
Circuit Breakers Both Power Sources 150 A – 0150 208 Vac/60 Hz B
Fixed Mount Molded Case C 225 A – 0225 120 Vac/60 Hz A
Circuit Breaker Source 1 Power Source, 300 A – 0300 220 Vac/50 or 60 Hz G
Molded Case Switch Source 2 400 A – 0400 600 Vac/50 Hz K
Power Source 600 A – 0600 415 Vac/50 Hz O
Fixed Mount Molded Case D 800 A – 0800 401 Vac/50 Hz N
Switch Source 1 Power Source, 1000 A – 1000 380 Vac/50 Hz H
Molded Case Circuit Breaker 1200 A – 1200 365 Vac/50 Hz Z
Source 2 Power Source 230 Vac/50 Hz M
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