Installation Manual
ASCO 3ATS, 3ADTS, 3NTS, 3NDTS
381333-406
ASCO Power Technologies
Page 1
DANGER is used in this manual to warn of a
hazard situation which, if not avoided, will result in
death or serious injury.
WARNING is used in this manual to warn of a
hazardous situation which, if not avoided, could
result death or serious injury.
CAUTION is used in this manual to warn of a
hazardous situation which, if not avoided, could
result in minor or moderate injury.
Rating Label
Each transfer switch contains a rating label to define the loads
and fault circuit withstand/closing ratings. Refer to the label
on the transfer switch for specific values.
Do not exceed the values on the rating label.
Exceeding the rating can cause person injury or
serious equipment damage.
An experienced licensed electrician must install the transfer
switch.
Installation
These transfer switches are factory wired and tested.
Installation requires mounting, connecting service cables, and
connecting engine start and auxiliary control circuits (if
required.).
Supporting Foundation
The supporting foundation for the enclosure must be level and
straight. Refer to the applicable enclosure outline drawing
included with the transfer switch for all mounting details
including door opening space.
If bottom cable entry is used, the foundation must be prepared
so that the conduit stubs are located correctly. Refer to the
enclosure outline drawing for specified area and location.
Provide cable bending space and 1 inch minimum clearance to
live metal parts. When a concrete floor is poured, use
interlocking conduit spacer caps or a wood or metal template
to maintain proper conduit alignment.
Mounting
Refer to the outline and mounting diagram and mount the
transfer switch according to details and instructions shown on
the diagram. Mount it vertically to a rigid supporting
structure. Level all mounting points by using flat washers
behind the holes to avoid distortion of the transfer switch.
Protect the transfer switch from construction grit
and metal chips to prevent malfunction or
shortened life of the transfer switch.
381333-406
Refer to the outline and wiring drawings provided
with the 3ATS, 3NTS, 3ADTS, or 3NDTS for all
installation and connection details and accessories.
DANGER
!
WARNING
!
CAUTION
!
Refer to
User’s Guide 381333-400
for the Goup G
Controller status display messages, time delays,
pickup and dropout settings, and adjustments.
3ATS, 3ADTS, 3NTS, 3NDTS
G-design 1600-3000 A Transfer Switches
Installation Manual
WARNING
!
NOTICE
INSTALLATION
Mounting ..........................................................1
Power Connections .........................................2
Engine Starting Contacts.................................2
FUNCTIONAL TEST
1- Manual Operation........................................3
2- Voltage Checks ...........................................4
3- Electrical Operation .....................................6
TESTING & SERVICE
Transfer Test ...................................................6
Preventive Maintenance ..................................6
Manual Load Transfer .....................................6
TROUBLESHOOTING ....................................7
INDEX..............................................................8
Table of Contents
