2.12.5
Time-Delay on Alarms
For startup of the engine, time-delay devices shall be installed bypassing
the low lubricating oil pressure alarm during cranking [and the low
coolant-fluid outlet temperature alarm]. The lube-oil time-delay device
shall return its alarm to normal status after the engine starts.[ The
coolant time-delay device shall return its alarm to normal status 5 minutes
after the engine starts.]
2.12.6
[Remote Alarm Panel
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NOTE: The remote alarm panel location should be
shown on the plans. Delete requirements for the
remote alarm panel where it is not used. The remote
panel may be furnished loosely and unmounted, to be
installed on the pump station control console by
others.
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A remote alarm panel with 100 percent functional redundancy to the alarm
panel shall be provided.[ The remote panel shall be located and mounted as
shown on the plans.] [The remote panel shall be suitably packed and
shipped as directed by the Contracting Officer for installation by others
on the station control console.]]
2.13
GOVERNOR
Each engine shall be provided with a governor to control the rotational
speed of the engine in response to changing load requirements. The
governor shall be configured for safe manual adjustment of the speed during
operation of the engine, without special tools.
2.13.1
Speed Regulating Governor
The engine governor shall maintain close speed regulation under all load
conditions. The speed variation shall not exceed 6 percent of normal speed
when full load is suddenly applied or removed. The design of the governor
shall be such that the engine speed may be changed by governor adjustment
during engine operation to any speed between 80 and 100 percent of the
normal speed (corresponding to normal operating pump speeds) within 2
percent. The speed fluctuation at any load shall not exceed 2 percent. A
raise/lower speed control shall be mounted on the engine instrument board.[
The speed adjust control shall have provisions for allowing control of the
speed control circuits from a remote location.] The engine fuel rack
servomotor shall be suitable for operation from a 120-V AC source.
2.13.2
Emergency Overspeed Governor and Load Limit
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NOTE: If the pump drive is out of service for
extended periods with little or no maintenance, then
the shutdown mechanisms for overspeed should prevent
both fuel and air supplies from entering the
cylinders. If the units are well maintained and
used frequently, either type termination should work
satisfactorily.
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SECTION 15133A
Page 36
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