SECTION 2 TESTING & SERVICE
2-- 1
TRANSFER TEST
Test the Automatic Delayed–Transition Transfer Switch
portion of the 7000 Series ADTB 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 follow ing test the gen erator will start, the load wil l
be transferr ed to the Em er g enc y sourc e, then back to the
Normal source. An interruption to the load will occur,
unl ess the Transfer Switch contacts are bypassed before
the test. See pages 3–1 and 3–2 for bypassing & isolating
inst r u ctions if no interr u pt ion of load is req u ir ed .
Be sure to close the enclosure door
before proceeding to prevent personal
injury in case of electrical system fault.
Perform the four–step Electrical Operation – Transfer
Tes t procedure on page 1–4.
PREVENTIVE MAINTENANCE
Reasonab l e care in preven tiv e main te nan ce w il l insur e
high reliability and long life for the 7000 Series ADTB.
An annual preventive maintenance program is
recommended.
ASCO Services, Inc. (ASI) is ASCO Power
Technologies’ na tional service organization. ASI
can be contacted at 1–800–800–2726 for informa-
tion on preventive maintenance agreements.
Checklist f or Yearly Inspection
Hazardous voltage capable of causing shock,
burns, or death is used in this switch.
Deenergize both Normal – Emergency power
sources befo re performing inspections!
S Clean the ATS enclosure. Brush and vacuum
away any excessive dust accumulation. Remove
anymoisturewithacleancloth.
S 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.
S Maintain transfer switch lubrication.Ifswitchis
sub jec ted to severe dust or ab norm al operating
conditions, renew factory lubrication on all
movements and linkages. R elubricate solenoid
oper ato r if TS coil is repl aced. Don’t use oil; orde r
lubrication kit 75-100.
S 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), a nd 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.
DISCONNECTING THE CONTROLLER
The harness disconnect plugs are furnished f or repair
purposes only and should not have to be unplugge d. If
the controller must be isolated, follow these steps:
Bypass–Isolation Switch is energized!
Do not touch isolation contact fingers;
shock, burns, or death could result!
Disconnecting the Plugs
1. Bypass and Isolate the Automatic Transfer Switch.
2. Open the upper enclosure door.
3. Separate the two quick disconnect plugs by
squeezing the latches. Do not pull on the harness
wires.
Reconnecting the Plugs
1. The ATS should be still bypassed and isolated.
2. The two harness plugs and sockets are keyed.
Caref ully align the plugs with t he sockets and press
straight in until the latches click.
3. Close the enclosure doors.
4. Follow Return to Service instructions on page 3–4.
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