Emerson GDESIGN 10003000 A Section Testing & Service, Preventive Maintenance, Replacement Parts

SECTION 3

TESTING & SERVICE

PREVENTIVE MAINTENANCE

Reasonable care in preventive maintenance will insure high reliability and long life for the switch. An annual preventive maintenance program is recommended.

ASCO Services, Inc. (ASI) is ASCO Power Technologies’s national service organization. ASI can be contacted at 1-800-800-2726 for infor- mation on preventive maintenance agreements.

TESTING

Operate the switch at least once a month by following this four-step Electrical Operation Test.

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. Contact your local ASCO Power Technolo- gies sales office or ASI. In the United States call 1–800–800–ASCO (2726).

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:

Transfer Switch Test

A.Turn the door-mounted Transfer Control switch clockwise to Transfer to Emergency.

B.The transfer switch will operate to the Emergency position. The Load Connected To Emergency light should come on and the Load Connected to Normal light should go off.

C.Turn the door-mounted Transfer Control switch counterclockwise to Transfer to Normal.

D.The transfer switch will operate to the Normal position. The Load Connected to Normal light should come on and the Load Connected to Emergen- cy light should go off.

Disconnecting the Plugs

1.Observe the position of the transfer switch.

a.If the transfer switch is in the Normal position, place standby engine starting control in the off position. Then open the emergency source circuit breaker.

b.If the transfer switch is in the Emergency posi- tion, open the normal source circuit breaker. Place the engine starting control in the test or run position.

2.Separate the quick disconnect plugs by squeezing the latches. Do not pull on the harness wires.

Checklist for 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!

SClean the switch enclosure. Brush and vacuum away any excessive dust accumulation. Remove any moisture with a clean cloth.

Reconnecting the Plugs

1.Observe the position of the transfer switch.

a.If the transfer switch is in the Normal position, be sure that the standby engine starting control is still in the off position. The emergency source circuit breaker still should be open.

b.If transfer switch is in the Emergency position, normal source circuit breaker still should be open.

SCheck the Switch Contacts. Remove transfer switch barriers and check the condition of the contacts. Replace the contacts if they become pitted or worn excessively. Reinstall barriers carefully.

SMaintain transfer switch lubrication. If switch is subjected to severe dust or abnormal operating conditions, renew factory lubrication on all move- ments and linkages. Relubricate solenoid operator if TS coil is replaced. For 260–400 A order lubri- cation 625550–001 (Castrol EndurexR 4000 lubri- cant). For 1000–3000 A order lubricant kit 75–100.

SCheck all cable connections and retighten them.

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2.The harness plugs and sockets are keyed. Carefully align the plugs with the sockets and press straight in until both latches click.

3.Restore the opposite source as follows:

a.If the transfer switch is in the Normal position, place the standby engine starting control in the automatic position. Then close the emergency source circuit breaker.

b.If the transfer switch is in the Emergency position, close the normal source circuit breaker.