IB140015EN
For more information visit: www.Eaton.com
Instructional Booklet
Effective: August 2014
Page
15
ATC-900 Magnum Tranfer Switch O & M Manual
The following are some of the more popular options that can be
used on the Magnum Switch. There are several others which are
shown in the ATC-900 instruction booklet.
9B. Maintenance Selector Switch (MSS)
Provides a 2-position, maintained contact selector switch marked
"Operate" and "Disable." When the MSS is placed in the "Disable"
position, the controller logic will be disconnected from the transfer
motor circuit. The MSS is placed in the "Operate" position for nor-
mal automatic operation.
29G. Automatic/Manual Operation With Selector Switch
Provides 2-position selector switch (labeled Auto/manual) that per-
mits selection of the automatic or manual transfer. When in the
"Auto" position, the transfer switch operates with fully automatic
transfer, retransfer and generator startup and shutdown opera-
tions. When in the "Manual" position, manual operation is required
to initiate the generator startup or retransfer with generator shut-
down operations.
Note:
Transfer switches with
Feature 29
must have a white light lit when
the switch is not in the automatic switch mode.
37. Service Equipment Rated Transfer Switch
Provides the label "suitable for use as service equipment" and the
features necessary to meet the requirements for the label.
Includes service disconnect with visible indication and neutral
assembly with removable |link.
Feature 16B or 16N
must be
selected separately.
37A. Service Equipment Rated
Transfer Switch Without Ground Fault Protection Provides service
equipment rating for an application that does not require ground
fault protection.
37B. Service Equipment Rated Transfer Switch With Ground Fault
Protection
Provides service equipment rating for an application that requires
ground fault protection.
38. Steel Cover
Provides protection for a device panel as option 38a and protec-
tion for the controller as option 38b.
41E. Space Heater With Thermostat
Provides 1 100 or 375-watt space heater. A separate transformer
is provided for the 375 watt heater and it is located on the top
shelf of the switch.
CVX
The CVX device features a Thermally Protected Metal Oxide Varis-
tor technology and comes with high intensity LED phase status
indicators.
SPD
The SPD features a Thermally Protected Metal Oxide Varistor
technology. It comes with dual-colored protection status indica-
tors for each phase and for neutral-ground protection mode. It
comes with an audible alarm with silence button and a Form C
contact. An optional SPD with surge counter feature package is
available. This provides six-digit surge counter with reset button.
3.7 Enclosure
The rugged steel switch enclosure is supplied with four door
hinges, regardless of enclosure size, to insure proper support of
the door and door mounted devices. The hinges have removable
hinge pins to facilitate door removal. The doors are supplied as
standard with thumbscrew and padlock latches. Cable entry holes
are the customer’s responsibility.
The door is used to mount a variety of lights, switches, and push
buttons, depending upon the options required for a particular
switch. All switch doors are supplied with a heavy duty plastic
accessory panel in place, whether or not external devices are
required. When lights, pushbuttons, or switches are required,
they are normally mounted in the plastic door mounted panel.
Transfer switch enclosures and some internal steel mounting
plates, such as the transformer panel mounting plate, go through
a pre-treatment cleaning system prior to painting to insure a dura-
ble finish. Should the enclosure become scratched and in need of
touch up paint, use ANSI 61. All remaining steel is galvanized.
The standard switch enclosure is NEMA Type 1 for general indoor
use (Table 4).
Table 4. Transfer Switch Equipment Enclosures.
3.8 Standards
Eaton transfer switch equipment is listed for application by UL and
CSA. In addition, Eaton ATSs are listed in File E38116 by
UL, Inc., under Standard UL 1008. This standard covers require-
ments for ATSs intended for use in ordinary locations to provide
for lighting and power as follows:
a. In emergency systems, in accordance with articles 517 and
700 in the National Electrical Code (NEC), American National
Standards Institute/National Fire Protection Association
(ANSI/NFPA) 70 and the NFPA No. 76A and/or
b. In stand-by systems, in accordance with article 702 of the
NEC and/or
c. In legally required stand-by systems in accordance with article
701 of the NEC.
d. In critical operations power systems (COPS article 708) in
accordance with article 708 of the NEC
Eaton ATSs are available to meet NFPA 110 for emergency and
stand-by power systems, and NFPA 99 for health care facilities
when ordered with the appropriate options.
Since Eaton ATSs utilize specially designed switches and/or
switching devices as the main power switching contacts, these
devices must also be listed under the additional UL Standard
1066. UL utilizes two basic types of listing programs: a) Label
Service and b) Re-examination. UL1066 employs a label service
listing program which requires an extensive follow-up testing pro-
gram for listed devices. Standard UL1008 for ATSs lists devices
under the re-examination program which only requires a continual
physical re-examination of the components used in the product to
insure consistency with the originally submitted device. Follow-up
testing IS NOT required by UL1008.
Representative production samples of switches and switching
devices used in Eaton ATSs are subjected to a complete test pro-
gram identical to the originally submitted devices on an ongoing
periodic basis per UL1066. The frequency of such a re-submittal
can be as often as every quarter for a low ampere device.
NEMA TYPE
DESIGN
PROTECTION
1
Indoor
Enclosed Equipment
3R
Outdoor
Rain, Ice Formation
