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Instructional Booklet
Page 34
Effective: August 2007
SECTION 8: INSTALLING OPTIONAL
COMPONENTS
8.1 Optional TVSS
8.1.1 Installing an Optional TVSS in a Standard 100 A and 200 A
ATS
If you have ordered a standard optional TVSS, follow the steps
outlined below to install the optional TVSS.
Note: Because of the size of the enclosure, if you have ordered either a 100
A or 200 A standard ATS, the TVSS CANNOT be installed inside the enclo-
sure. It will have to be mounted on the outside of the enclosure in a suit-
able position (see Figure 54).
Figure 54. Possible Location for and Externally Mounted TVSS.
Step 1: Turn the utility (Source 1) power off and turn the genera-
tor (Source 2) control selector switch to the "OFF" posi-
tion before attempting to install the externally mounted
TVSS.
Step 2: After the ATS has been mounted, determine the desired
location for mounting the TVSS. An existing 0.50 in.
(1.25 cm) knockout can be used or a 0.50 in. (1.25 cm)
hole can be drilled in the enclosure.
EXTREME CARE SHOULD BE TAKEN TO PROTECT THE ATS FROM
DRILL CHIPS, FILINGS, AND OTHER CONTAMINANTS WHEN MAK-
ING THE TVSS MOUNTING HOLE TO PREVENT DAMAGE OR A
FUTURE MALFUNCTION
TO MEET APPLICABLE CODES, AN EXTERNALLY MOUNTED
TVSS MUST BE MOUNTED BELOW THE LEVEL OF THE BOT-
TOM LUGS (LOAD LUGS) OF THE CONTACTOR.
CAUTION
CAUTION
For more information visit: www.eaton.com
O & M Manual for the CHGENLC Automatic
Transfer Switch with ATC-100 Control
Figure 55. TVSS Must be Mounted Below the Level of the Load
Lugs.
Step 3: Remove the lock nut from the nipple of the TVSS.
Step 4: Feed the TVSS wires and mounting nipple through the
knockout or hole drilled in the ATS enclosure.
Step 5: Secure the TVSS to the ATS enclosure using the lock nut
removed in Step 3. Be sure to firmly secure the TVSS
using an appropriate tool to fully tighten the lock nut (see
Figure 56).
I
Figure 56. TVSS Secured to the ATS Enclosure.
Note:The length of the four (4) TVSS wires can affect the performance of
the TVSS. During installation, the wires should be kept as short and as
close to identical length as possible. In keeping the length of the wires as
equal as possible, they should be "braided" to increase the effectiveness of
the TVSS.
LOAD
LUGS
IB00405002E
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