MIL-HDBK-1024/1
2.5.3
Incoming Power. Provide incoming power through an isolation
transformer and an entrance switch. Provide power to only one facility
through the isolation transformer. Distribute power to an essential and
non-essential bus, if required. Connect the emergency generator, if required,
to the essential bus through an isolation switch and automatic switch gear.
Provide either single or three phase power as required.
2.5.4
Separate Buses. Provide electrical power for electronic, air
traffic control, computer, and other technical equipment on a separate bus
from electrical power for facility mechanical and building systems.
2.5.5
Lightning Protection. Design facilities for lightning protection.
Refer to NFPA 78, Lightning Protection Code, and MIL-HDBK-1004/6, Lightning
Protection, for minimum standards.
2.5.6
Lighting. Design lighting in accordance with MIL-HDBK-1190.
Consider natural lighting sources.
2.5.6.1
Interior Lighting. Provide fluorescent interior lighting with radio
frequency shielding and suppression filters. Calculate lighting levels using
zonal cavity method.
2.5.6.2
Exterior Lighting. Provide high pressure sodium vapor exterior
lighting. Calculate lighting levels using point-by-point method.
2.5.7
Emergency Electrical Power
2.5.7.1
Emergency Generator. Provide emergency generators with electronic
line monitoring equipment and automatic starting and switching capability.
When used in conjunction with an UPS, provide generator output at least 1.5
times the output rating of the UPS. Ensure emergency generator is capable of
supplying the rated load within 15 seconds of a power failure. Provide the
following for emergency generators:
a) An isolation switch to bypass the emergency generator during
generator maintenance.
b) An automatic battery charger for maintenance of generator
starting batteries.
c) An isolated mounting slab for the generator to reduce noise and
vibration transmission.
d) See Figure 4.
Provide the following when an indoor emergency
generator is required:
(1)
A separate generator room with an independent ventilation
system.
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