MIL-DTL-917 Electric Power Equipment, Basic Requirements ForThis specification covers the basic requirements applicable to the design, materials, and construction of naval shipboard electric power equipment \(exclusive of communication equipment, information technology \(IT\) equipment, and combat systems [fire control and weapons control equipment]\). Unless otherwise specified herein, the electric equipment developed for shipboard use under the requirements of this specification are limited to a maximum 450 volt \(V\) alternating current \(AC\) and a maximum 1,000 V direct current \(DC\). This equipment is intended for use on surface and submarine naval vessels \(see 6.2\).

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MIL-DTL-917F(SH)

PARAGRAPH

PAGE

3.14.2.3 Normal painting procedure ............................................................................................................... 61

3.14.2.4 Large ferrous metal parts stored outdoors temporarily ..................................................................... 61

3.14.3 Soldering.................................................................................................................................................. 62

3.14.3.1 Solder for windings........................................................................................................................... 62

3.14.3.2 Solder for parts ................................................................................................................................. 62

3.14.4 Brazing .................................................................................................................................................... 62

3.14.5 Welding ................................................................................................................................................... 62

3.14.5.1 Structural welding............................................................................................................................. 62

3.14.5.2 Welding of electrical connections..................................................................................................... 62

3.15 Thermal design ............................................................................................................................................... 63

3.15.1 Selection of the cooling system ............................................................................................................... 63

3.15.1.1 Air coolers ........................................................................................................................................ 63

3.15.1.1.1 General design requirements ..................................................................................................... 63

3.15.1.1.2 Specific cooling systems............................................................................................................ 63

3.15.1.1.2.1 Air coolers for motors and generators ................................................................................ 63

3.15.1.1.2.2 Air coolers for assembled hardware ................................................................................... 63

3.15.1.2 Liquid coolers ................................................................................................................................... 63

3.15.1.2.1 General design requirements ..................................................................................................... 63

3.15.1.2.2 Design and placement of parts ................................................................................................... 63

3.15.1.2.3 Hoses, fittings, and piping systems ............................................................................................ 64

3.15.1.2.3.1 Teflon hose ......................................................................................................................... 64

3.15.1.2.3.2 Clamps ................................................................................................................................ 64

3.15.1.2.3.3 Piping and fittings ............................................................................................................... 64

3.15.1.2.4 Heat exchangers ......................................................................................................................... 64

3.15.1.2.5 Direct cooling of electrical components .................................................................................... 64

3.16 Mechanical features ........................................................................................................................................ 64

3.16.1 Castings ................................................................................................................................................... 64

3.16.2 Panel-mounted parts ................................................................................................................................ 64

3.16.3 Fastening devices..................................................................................................................................... 64

3.16.4 Handles and control knobs....................................................................................................................... 64

3.16.5 Metallic inserts ........................................................................................................................................ 64

3.16.6 Pins .......................................................................................................................................................... 64

3.16.7 Rounded corners and edges ..................................................................................................................... 65

3.16.8 Countersinking......................................................................................................................................... 65

3.16.9 Marking for rotation ................................................................................................................................ 65

3.16.10 Lubrication design and lubricants .......................................................................................................... 65

3.16.11 Electrical bonding .................................................................................................................................. 65

3.16.12 Test points.............................................................................................................................................. 65

3.17 Plates for identification and information ........................................................................................................ 65

3.17.1 Type of service ........................................................................................................................................ 65

3.17.2 Mounting of plates ................................................................................................................................... 65

3.17.3 Color style of plastic plates...................................................................................................................... 65

3.17.4 Identification plates ................................................................................................................................. 65

3.17.4.1 Warning and caution plates............................................................................................................... 65

3.17.4.2 High voltage ..................................................................................................................................... 66

3.17.4.3 Illuminated plates.............................................................................................................................. 66

3.17.5 Control setting indicators......................................................................................................................... 66

3.18 Identification of parts...................................................................................................................................... 66

3.18.1 Identification of part leads ....................................................................................................................... 66

3.18.2 Method of marking .................................................................................................................................. 66

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