Filter
Top Products
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
TransferSwitchand Controller. Turnthe Engine Control
switch toAuto andputthe engine–generatorstartingcon-
trol (at the engine–generator set) in automatic 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 fault.
Perform the four–step Electrical Operation – Transfer
Test procedure on page 1–4.
PREVENTIVE MAINTENANCE
Reasonable care in preventive maintenance will insure
high reliability and long life for the 7000 Series ADTB.
An annual preventive maintenance program is recom-
mended.
ASCO Services, Inc. (ASI) is Automatic Switch
Company’s national service organization. ASI can
be contacted at 800-800-2726 for information 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 before 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 lin ka g es . Re l u b r ic ate solen o id oper ato r if TS
co il is rep l aced . 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 or-
dering parts provide the Serial No., Bill of Material No.
(BOM), and Catalog No. from the transfer switch name-
plate. For service callASCO Servicesat1–800–800–2726;
you will be put in contact with your local ASI office.
DISCONNECTING THE CONTROLLER
The harness disconnect plugs are furnished for repair
purposes only and should not have to be unplugged. 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 uppe r enclosure door.
3. Separate the two quick disconnect plugs by squeez-
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.