MIL-HDBK-1191
TABLE 10-2
CONTINUOUS AND EMERGENCY RATED
DIESEL-ELECTRIC GENERATOR SETS FOR MEDICAL FACILITIES
DEFINITIONS:
Prime Power Class engines are for use with diesel-electric generator
1.
sets expected to provide power on a continuous basis (i.e., in excess of 4,000
hours annually or in excess of 40,000 hours during the initial 10 years of
operation) to serve as the sole or primary source of power.
Standby Power Class engines are for use with diesel-electric generator
2.
sets expected to provide power on a standby basis for a significant number of
hours each year (i.e., between 1,000 and 4,000 hours annually or between
10,000 and 40,000 hours during the initial 10 years of operation).
Emergency Power Class engines are for use with diesel-electric generator
3.
sets expected to provide power on an emergency basis for a short period of
time (i.e., less than 1,000 hours annually or less than 10,000 hours during
the initial 10 years of operation).
DESIGN APPLICATION:
1.
For 50-Hz power the indicated speed limits should be reduced to the
nearest synchronous speed for that frequency.
2.
Hospital diesel-electric generator sets are normally EMERGENCY POWER
CLASS.
3.
Hospital diesel-electric generator sets used for co-generation will be
Class "PRIME POWER" or "STANDBY POWER".
4.
Design and Construction Cost for Co-generation. The cost differential
between medical emergency power and co-generation capacity will not be funded
with medical project funds.
LOCATION OF ENGINE-GENERATOR SETs. Generator sets normally will
10.3.6
be located in the central energy plant serving the hospital,provided that the
plant is located sufficiently close to the structure to minimize line losses
and prevent excessive cable runs. When the central energy plant is remote
from the hospital structure, generators will be installed in a generator
building located adjacent to the structure or within the structure at ground
level ( along the exterior wall) whichever is more economical. The generator
and emergency switch gear rooms will be located at or near the building
exterior to facilitate initial installation and removal and replacement of
defective equipment and will be provided with 1 and 1/2 hours battery back-up
for general illumination. The generator sets and auxiliaries will be arranged
and located so minimum facility modifications will be required for future
installation or replacement of an additional generator set and auxiliaries.
Service entrance transformers and other equipment not supporting the essential
electrical system will not be installed in the same area (room) as the
engine-generator sets. Provide view window in or adjacent to the entrance
door.
10-7
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