ASCO 3ATS, 3ADTS, 3NTS, 3NDTS
Installation Manual
Page 6
ASCO Power Technologies
381333-406
Testing & Service
Transfer Test
Operate the transfer switch at least once a month by following
the
Electrical Operation
procedure on page 6.
Preventive Maintenance
Reasonable care in preventive maintenance will insure high
reliability and long life for the transfer switch. An annual
preventive maintenance program is recommended.
Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death is used in this transfer switch.
Deenergize both Normal & Emergency power
sources before performing inspections!
Clean the enclosure.
Deenergize all sources, then brush
and vacuum away any excessive dust accumulation. Remove
moisture with a clean cloth.
Inspect the transfer switch contacts.
Deenergize all
sources, then remove the transfer switch barriers and check the
contact condition. Replace contacts when pitted or worn
excessively. Reinstall the barriers carefully.
Maintain transfer switch lubrication.
Under normal
operating conditions no further lubricating is required. Renew
factory lubrication if the transfer switch is subjected to severe
dust, abnormal operating conditions, or if the TS coil is
replaced. Order lubrication kit 75-100.
Check all cable connections & retighten them.
Torque to values shown on the transfer switch label.
Replacement Parts
When ordering replacement parts provide the Serial No., Bill
of Material No. (BOM), and Catalog No. from the transfer
switch nameplate. In the US call 800-800-2726 (ASCO) or
contact [email protected].
Manual Load Transfer
This procedure will manually transfer the load if the controller
is disconnected.
Do not manually operate the transfer switch until
both power sources are disconnected: open both
circuit breakers.
1.
Deenergize both the normal and emergency source (open
both circuit breakers).
2.
Use the maintenance handle to manually operate the
transfer switch to the opposite source. See pages 3 and 4,
Manual Operation
.
3.
Close the enclosure door. If the transfer switch is in the
emergency position, manually start the generator and then
close the emergency source circuit breaker.
DANGER
!
WARNING
!
ASCO Services, Inc. (ASI) is ASCO Power
Technologies’ national service organization.
ASI can be contacted at 1-800-800-2726 for
information on preventive maintenance agreements.
