Installation Manual Testing & Service
8 381333-415 B
TESTING & SERVICE
TRANSFER TEST
Test the Automatic Transfer Switch portion of the
7000 Series ATB at least once a month. This
procedure checks the electrical operation of the
Transfer Switch and Controller. Turn the Engine
Control switch to Auto and put the engine–generator
starting control (at the engine–generator set) in
automatic mode.
In the test the generator will start, the load will be
transferred to the Emergency source, then back to the
Normal source. An interruption to the load will occur,
unless the Transfer Switch contacts are bypassed
before the test. See pages 10 and 1 for bypassing
and isolating instructions if no interruption of load is
required.
Be sure to close the enclosure doors before
proceeding to prevent person injury in case of
electrical system fault.
Perform the Electrical Operation – Transfer Test
procedure on pages 6 and 7.
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will
insure high reliability and long life for the 7000 Series
ATB. An annual preventive maintenance program is
recommended.
ASCO Services, Inc. is ASCO Power Technologies’
national service organization. They can be contacted
at 1-800-800-2726 for information on preventive
maintenance agreements
YEARLY INSPECTION
Hazardous voltage capable of causing shock,
burns, or death is used in this switch.
Deenergize both Normal – Emergency power
sources before performing inspections!
Clean the ATS enclosure. Brush and vacuum
away any excessive dust accumulation. Remove any
moisture with a clean cloth.
Check the transfer switch contacts. Remove
transfer switch barriers and check the condition of the
contacts. Replace contacts when pitted or worn
excessively. Reinstall the barriers carefully.
Maintain transfer switch lubrication.
If switch is subjected to severe dust or abnormal
operating conditions, renew factory lubrication on all
movements and linkages. Re-lubricate solenoid
operator if TS coil is replaced. Don’t use oil; order
lubrication kit 75-100.
Check all cable connections & retighten them.
REPLACEMENT PARTS
Replacement parts are available in kit form. When
ordering parts provide the Serial No., Bill of Material
No. (BOM), and Catalog No. from the transfer switch
nameplate. For service call ASCO Services at 1–800–
800–2726; you will be put in contact with your local
ASI office.
MANUAL LOAD TRANSFER
This procedure manually transfers load to other
source if the Transfer Switch or Control Panel are out
of service.
Close enclosure doors to prevent personal
injury in case of electrical system fault.
1. Be sure that the Bypass Handle is CLOSED on
either Emergency or Normal (see page 10).
2. Be sure that the Isolation Handle is in the TEST or
ISOLATE position (see page 11).
3. Turn the Bypass Handle counterclockwise to OPEN
the Bypass Switch. Then Bypass to the other
source (see page 10).
MAINTENANCE HANDLE
Bypass and isolate the Transfer Switch before
using the maintenance handle! See pages 10
and 11. Remove the hub and handle after using
them and store on frame.
Figure 7. Maintenance handle and hub.
Turn counterclockwise
to Emergency.
Turn clockwise
to Normal.
insert
handle
into hole
Grasp
handle
firmly
slide hub
onto shaft
for 7ACTB & 7ADTB
slide hub onto
shaft & insert pin
Pull out shaft to operate
Emergency contacts.
Push in
shaft to operate
Normal contacts.
for 7ATB
Turn counterclockwise
to OPEN contacts.
Turn clockwise to
CLOSE contacts.
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