Installation And Wiring - Eaton ATC-900 Operation And Maintenance Manual

Instructional Booklet
Page 14 Effective: April 2018
Section 4: Installation and Wiring
4.1 General
Eaton transfer switches are factory wired and automatically tested
with a test report included. Installation requires solidly mounting
the enclosed unit and connecting the power cables and auxiliary
pilot circuits. Physical mounting procedures and power cable con-
nections are covered in this section. All other required wiring or
electrical connection references are covered in a separate Cus-
tomer 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 7 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.
4.3 Unpackaging and Inspection
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.
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: Visually verify that there are no broken or damaged com-
ponents or evidence of distorted metal or loose wires as a
result of rough handling.
CAUTION
For more information visit: www.eaton.com
Operation and Maintenance Manual, Automatic Transfer Switch, Bypass Isolation,
Contactor Type, Open/Closed Transition, ATC-900 Controller, 3000A Frame
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. The
switch has 12 bolts holding the unit down into the pallet
each with a seismic washer. Do not throw away the seis-
mic washers as they will be used when mounting the
switch on the pad.
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.
4.4 Mounting Procedure
CABLE ENTRY HOLES ARE NOT PART OF THE ENCLOSURE WHEN
SHIPPED FROM THE FACTORY AND MUST BE PROVIDED IN THE
FIELD, EITHER BEFORE OR AFTER MOUNTING THE ENCLOSURE.
With the enclosed transfer switch equipment unpacked and ready
for mounting, proceed with the following steps.
Step 1: Mounting and cabling access is best provided by remov-
ing side and rear covers (when applicable). If required to
remove the enclosure covers a 3/8 socket will be
required. The back and two sides are similar in that if the
lower panels need to be removed, the top panel must be
removed first.
Step 2: Gently maneuver the switch into its location using all of
the supplied lift brackets.
Step 3: Bolt the enclosure to the base (see Figures 16 & 17). Seis-
mic mechanical mounting requirements use 12 5/8-11
UNC grade 5 or better hex head bolts with the included
washers (Eaton pn. 66A8231H14). Also see the outline
drawing for locations.
Step 4: Tighten bolts to 120 ft-lbs (163 N
Figure 16. Mounting With Seismic Washer.
CAUTION
NOTICE
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IB140064EN