IB01602015E
For more information visit: www.eaton.com
Instruction Booklet
Effective: August 2010
Page
13
ATC-300 2-Postion Contactor
Based Transfer Switch
51D1. 50kA CVX Surge Device
This feature gives protection for surge current capacity
rating 50kA, upto 480VAC by providing a low impedance
surge path to ground while supporting rated voltage. It
provides LED indication.
51F1. 100kA CVX Surge Device
This feature gives protection for surge current capacity
rating 100kA, upto 480VAC by providing a low imped-
ance surge path to ground while supporting rated volt-
age. It provides LED indication.
3.6 Enclosure
The rugged steel ATS enclosure is supplied with three door
hinges, regardless of enclosure size. They ensure proper support
of the door and door mounted devices (Figure 9). The hinges
have removable hinge pins to facilitate door removal. Certain
procedures, such as switch mounting, are simplified with the
door removed. The doors are supplied as standard with pad-lock-
able latches.
Figure 9. Typical Type 1 Enclosure (Door Closed).
The door is used to mount a variety of lights, switches, and
push-buttons, depending upon the options required for a particu-
lar ATS. All lights and switches are mounted in the plastic door-
mounted panel.
The rear of the enclosure is supplied with teardrop shaped holes
in the top and bottom mounting flanges to facilitate mounting. It
is also supplied with two positioning bolts and various pre-tapped
inserts to insure proper positioning of the power panel anytime
the power panel must be repositioned to accommodate a differ-
ent cable entry position. Cable entry holes are the responsibility
of the customer.
ATS enclosures and all internal steel mounting plates, such as
the power panel mounting plate, go through a pretreatment
cleaning system prior to painting to ensure a durable finish.
The standard ATS enclosure is NEMA 1 Type for general use.
However, a variety of enclosures are available to address almost
any environmental circumstance (see Table 3).
Table 3. Transfer Switch Equipment Enclosures
3.7 Standards
Eaton ATS equipment, enclosed in any of the enclosures listed in
Table 3, is listed for application by UL and ULC. In addition,
Eaton ATSs are listed in File E38116 by Underwriters Laborato-
ries, Inc. under Standard UL 1008. This standard covers require-
ments for automatic transfer switches intended for use in
ordinary locations to provide lighting and power as follows:
a. In emergency systems, in accordance with articles 517
and 700 in the National Electrical Code, ANSI/ NFPA 70,
and the National Fire Protection Association No. 76A;
and/or
b. In standby systems, in accordance with article 702 of the
National Electrical Code; and/or
c. In legally required standby systems in accordance with
article 701 of the National Electrical Code.
Eaton ATSs are available to meet NFPA 110 for emergency and
standby power systems, and NFPA 99 for health care facilities
when ordered with the appropriate options.
Standard UL 1008 for ATSs lists devices under the reexamina-
tion program which only require a continual physical reexamina-
tion of the components used in the product to ensure
consistency with the originally submitted device. Follow-up test-
ing is not required by UL 1008.
NEMA TYPE
DESIGN
PROTECTION
Open
Indoor
1
Indoor
Enclosed Equipment
3R
Outdoor
Rain, Ice Formation
12
Indoor
Dust, Dirt, and
Non-Corrosive Liquids
