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IB140015EN
Instructional Booklet
Page
16
Effective: August 2014
ATC-900 Magnum Tranfer Switch O & M Manual
Section 4: Installation and Wiring
4.1 General
Eaton transfer switches are factory wired and tested. Installation
requires solidly mounting the enclosed unit and connecting the
power cables and auxiliary pilot circuits. Physical mounting proce-
dures and power cable connections are covered in this section.
All other required wiring or electrical connection references are
covered in a separate
Customer Wiring Diagram
packaged with
the transfer switch.
Locate the wiring booklet, review it, and keep it readily available
for reference purposes during installation and testing. Once a
transfer switch is properly installed and wired, it should be
mechanically and electrically checked for proper installation and
operation. The procedures for these initial mechanical and electri-
cal checks are outlined in Section 8.1 of this instruction manual.
4.2 Mounting Location
Choose a location that offers a flat, rigid mounting surface capa-
ble of supporting the weight of the enclosed transfer switch
equipment. Avoid locations that are moist, hot, or dusty. How-
ever, Eaton offers enclosure designs that can be used in special
environments. If there are any doubts as to the suitability of the
location, discuss it with your Eaton representative.
Check to make certain that there are no pipes, wires, or other haz-
ards in the immediate area that could create a problem. The pan-
els provide ample room for rear cable entry from top, bottom, and
sides. At no time should cable be routed to retard the action of
relays or cover the logic in a way that restricts adjustments.
Maintain proper electrical clearances between live metal parts and
grounded metal.
For installation and maintenance purposes, the Source 1 and
Source 2 power sources must have an overcurrent protective
device upstream of the transfer switch, unless overcurrent protec-
tion is integral to the switch.
The dimensions of the transfer switch are an important consider-
ation in determining proper location selection.
4.3 Unpackaging and Inspection
Proceed with the following four steps:
Step 1:
Carefully uncrate the transfer switch. If damage is visible,
please contact your local Eaton sales representative or the
factory.
Step 2:
Open the door and visually verify that there are no broken
or damaged components or evidence of distorted metal or
loose wires as a result of rough handling.
Step 3:
A label on the door provides specifications for your trans-
fer switch. Verify that these specifications comply with
your requirements.
Step 4:
Remove any braces or packing used to protect the trans-
fer switch or internal components during shipping.
WARNING
BE CERTAIN THAT THE SOLID STEEL DEAD FRONT SHIELDS ARE
PROPERLY INSTALLED BEFORE THE TRANSFER SWITCH EQUIP-
MENT IS PUT INTO SERVICE. THE SHIELD PROVIDES PROTECTION
FROM DANGEROUS VOLTAGES AT THE LINE AND LOAD TERMI-
NALS WHEN THE EQUIPMENT IS IN OPERATION. FAILURE TO DO
SO COULD RESULT IN PERSONAL INJURY OR DEATH.
CAUTION
SINCE THE ENCLOSED TRANSFER SWITCH MUST BE LIFTED INTO
PLACE FOR MOUNTING, BE CERTAIN THAT ADEQUATE RESOURCES
ARE AVAILABLE FOR LISTING TO AVOID PERSONNEL INJURIES OR
EQUIPMENT DAMAGE.
CAUTION
EXTREME CARE SHOULD BE TAKEN TO PROTECT THE TRANSFER
SWITCH FROM DRILL CHIPS, FILLINGS, AND OTHER CONTAMI-
NANTS WHEN MAKING THE CABLE ENTRY HOLES AND MOUNTING
THE ENCLOSURE TO PREVENT COMPONENT DAMAGE OR A
FUTURE MALFUNCTION.
