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Document / 52 pages

Transmittal of generator prepurchase specifications, March 1998

Machine-extracted title · confidence 90%

Cover sheet transmitting requested prepurchase specifications for generators to the Department of Citywide Administrative Services.

NYC-WTC_000166874–000166925

Folder label: “GENERATOR PREPURCHASE SPECIFICATION

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NYC 9/11 Public Portal Document

PPS-Generators

If the engine fails to start after 4 adjustable cranking attempts (factory set at 10 seconds on and 10 seconds off, adjustable from 5 to 30 seconds) or if any protective device should operate while the engine is running, the engine shall be disconnected from service and immediately stopped. The engine control logic shall lock the failed set out of service and requires a manual reset. The engine control logic shall include a provision for conversion to single cycle cranking, adjustable from 35 to 210 seconds.

2) Five Position Engine Control Switch Operation

Stop/Reset - In this position, the engine shall not be capable of starting and/or running. If the engine was shutdown due to the operation of a protective device, the shutdown malfunction shall be reset when the switch is moved to this position. If the engine is running when the switch is moved to this position, it shall immediately shut down.

Off/Cooldown - In this position, the engine shall shut down after a cool down period.

Automatic - In this position, the engine control shall be in readiness for fully automatic operation upon receipt of a start signal.

Test-Off-Line - When placed in this position, the engine shall start and run as if a start signal were received except it shall not be connected to the bus unless a start signal is received. When returned to the Automatic position, the engine will shut down.

Test-On-Line - When placed in this position, the engine shall start, run and connect tot he bus as if a start signal were received. When returned to the Automatic position, the circuit breaker will open and the engine will run for its cooldown period before shutting down.

d. Synchronizing Mode Selector Switch

The synchronizing mode selector shall have the following positions:

1) Permissive - In this position, the governor controls are deactivated,. However, the synchronizer can operate as a passive synch check relay and signal the closing of the generator breaker.

OEM PPS-41 Generators 7 WTC March 20, 1998

NYC-WTC_000166916

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NYC-WTC_000166916Source: NYC Law Department, mirrored locally

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