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SECTION 2 TESTING & SERVICE
2--1
TRANSFER TEST
Test the Automatic Closed–Transition Transfer Switch
portion of the 7000 Series ACTB at least once a month.
This procedure checks the electrical operation of the
TransferSwitchandControlPanel. Turnthe EngineCon-
trol switch to Auto and put the engine–generator starting
control (at t he engine–generator set) in automat ic mode.
In the following 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 the Transfer Switch contacts are bypassed be-
fore the test. See pages 3–1 and 3–2 for bypassing & iso-
lating instructions if no interruption of load is required.
Be sure to close the enclosure door
before proceeding to prevent personal injury
in case of electrical system f ault.
Perform the four–step Electrical Operation – Transfer
Test procedure on page 1–4.
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure
high re liability and long life for the 7000 Series ACTB.
An annual preventive maintenance program is recom-
mended.
ASCO Services, Inc. (ASI) is ASCO Power
Technologies’ nati onal service organization. ASI
can be contacted at 1–800–800–2726 for informa-
tion on preventive maintenance a greements.
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 bef ore performing inspections!
❐ Clean the ATS enclosure. Brush and vacuumaway
any excessive dust accumulation. Remove a ny mois-
ture 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.Ifswitchis
sub jec ted to severe dust or abnor m al operating con-
ditions, renew factory lub r ic ation on all movem ents
and l in ka g es . Relu b r ic ate s o l en oid oper ator if TS
co il is repl aced . Don ’t us e oil ; ord er lubrication kit
75-100.
❐ Check all cable connections & retighten them.
REPLACEMENT PARTS
Replacement parts are available in kit form. When or-
dering parts provide the Serial No., Bill of Material No.
(BOM), and Catalog No. from the transfer switch name-
plate. For service callASCOServices at1–800–800–2726;
you will be put in contact with your local ASI office.
DISCONNECTING T HE CONTROLLER
The harness disconnect plugs are furnished for repair
purposes only and should not have to be unplugged. If
the control panel 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 uppe r enclosure door.
3. Separate the two quick disconnect plugs by squee z-
ing the latches. Do not pull on the harness wires.
Reconnecting the Plugs
1. The ATS should be still bypassed and isolated.
2. The t wo harness plugs and sockets are keyed. Care-
fully align the plugs with the sockets and press
straight in until the latches click.
3. Close the enclosure doors.
4. Follow Return to Service instructions on page 3–3.