Field observation report fax cover, 7 WTC OEM, Aug 1999

NYC 9/11 Public Portal Document

J^/04/99 08:11 FAX 2122190256 SWANKE HAYDEN CONNELL @003/004 08/03/89 16:02 FAX 212 615 3700 COSEJSmiL. @003/004

Mr. Joe Aliotta Swanke Hayden Connell Page Two Cosentini Associalw LLP CoruuiHng Engineers

3. A simulated power outage was performed on automatic transfer switches (A.T.S.) , numbers 2 thru 9, During loss of normal power all “AT.S’s” transferred to the Alternate ' power source with no difficulties. Time set points were set on all switches.

4. A simulated power outage was performed on A.T.S. #1. During loss of normal power A.T S.#l started the generators and was on line in approximately 7 seconds. All other switches transferred to alternate power source.

5. ; A total power outage was performed by opening all transfer switches alternate power disconnect switches. Loss of normal power to A.T.S. #1 started the generators. All other transfer switches remained at primary power source position until generators were on line (approximately 7 seconds) and served each of the transfer switch loads.

The fotiowing items were noted to be addressed and completed:

1. j Russel Electric to modify their software to perform priority load shedding sequence.

‘ Remark: At tins point of the system it does not affect the operation to deliver emergency power, but must be incorporated and tested.

2. J Collect the fuel oil pump system not operating for this test.

; Remark; The system is connected to a building fuel pump for temporary use. Operation of system is not affected. 1 3. ‘ Electrical contractor to label all buss duct and local disconnect switches.

. Remark: R.B . Samuels to complete

4. Correct on all 3 generator's cracks in muffler insulation.

Remark; iKmbassador to address.

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Combiidge Chicago New York CDrlando Wfishinglon, DC

NYC-WTC_000171253