MIL-HDBK-1004/2A
Page
5.5.5
Substation Structures...........................
43
5.5.6
Transformers....................................
43
5.5.6.1
Selection.......................................
43
5.5.6.2
Cooling.........................................
43
5.5.6.3
Transformer Capacity............................
43
5.5.6.4
Fire Protection.................................
43
5.5.6.5
Transformer Noise...............................
44
5.5.7
Lightning Protection............................
44
5.5.7.1
Classes.........................................
44
5.5.7.2
Types...........................................
44
5.5.7.3
Additional Requirements.........................
45
5.5.8
Control Features................................
45
5.5.8.1
Instrumentation.................................
45
5.5.8.2
Energy Monitoring...............................
45
5.5.8.3
Control Cables..................................
45
5.6
Working Space and Access Requirements...........
45
5.6.1
Design..........................................
45
5.6.2
Existing Construction...........................
46
5.7
Grounding.......................................
46
5.7.1
Grounding Electrode Systems.....................
46
5.7.1.1
Girdle Type.....................................
46
5.7.1.2
Grid Type.......................................
46
5.7.1.3
Special Techniques..............................
46
5.7.2
Equipment Grounding.............................
46
5.7.3
System Grounding................................
46
5.7.3.1
Neutral Grounding...............................
46
5.7.3.2
Ground Fault Protection.........................
47
5.7.4
Grounding Continuity............................
47
5.7.4.1
Fault Current...................................
47
5.7.4.2
Portable Substations............................
47
5.8
Safety Considerations...........................
47
5.8.1
Fencing.........................................
47
5.8.2
Metal Enclosures................................
47
5.8.3
Locking of Gates................................
47
5.8.4
Bonding of Gates................................
48
5.8.5
Legal Warning Signs.............................
48
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