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)

CONTENTS

PARAGRAPH

PAGE

1. SCOPE...................................................................................................................................................................... 1

1.1 Scope .................................................................................................................................................................. 1

2. APPLICABLE DOCUMENTS ................................................................................................................................ 1

2.1 General ............................................................................................................................................................... 1

2.2 Government documents ...................................................................................................................................... 1

2.2.1 Specifications, standards, and handbooks.................................................................................................... 1

2.2.2 Other Government documents, drawings, and publications ...................................................................... 11

2.4 Order of precedence.......................................................................................................................................... 17

3. REQUIREMENTS ................................................................................................................................................. 17

3.1 Acquisition requirements .................................................................................................................................. 17

3.2 Design requirements ......................................................................................................................................... 17

3.2.1 Safety ......................................................................................................................................................... 17

3.2.2 Compatibility ............................................................................................................................................. 17

3.2.3 Accessibility .............................................................................................................................................. 17

3.2.3.1 Mounting of replaceable items ........................................................................................................... 18

3.2.3.2 Doors and covers ................................................................................................................................ 18

3.2.3.3 Mounting fasteners ............................................................................................................................. 18

3.2.4 Operation of controls ................................................................................................................................. 18

3.2.5 Maintenance and repair.............................................................................................................................. 18

3.2.6 Fail-safe design .......................................................................................................................................... 18

3.2.7 Remote controls ......................................................................................................................................... 18

3.2.8 Standardization .......................................................................................................................................... 18

3.2.9 Input power................................................................................................................................................ 18

3.2.9.1 Alternating current (AC)..................................................................................................................... 18

3.2.9.2 Direct current (DC)............................................................................................................................. 18

3.2.10 Grounding ................................................................................................................................................ 19

3.2.10.1 Electrical grounding.......................................................................................................................... 19

3.2.10.2 Exposed metal or other conductive parts .......................................................................................... 19

3.2.11 Surge (indicated as spike) voltage suppression........................................................................................ 19

3.2.11.1 Parts stress limitation ........................................................................................................................ 19

3.2.12 Inclined operation .................................................................................................................................... 19

3.2.13 Temperature and humidity....................................................................................................................... 19

3.2.13.1 Temperature ...................................................................................................................................... 19

3.2.13.2 Humidity ........................................................................................................................................... 20

3.2.14 Shock and vibration ................................................................................................................................. 20

3.2.14.1 Shock ................................................................................................................................................ 20

3.2.14.2 Vibration ........................................................................................................................................... 20

3.2.15 Equipment mounting ............................................................................................................................... 20

3.2.16 Electromagnetic interference (EMI) general requirements ...................................................................... 20

3.2.17 DC magnetic field environment............................................................................................................... 20

3.2.18 Magnetic field reduction.......................................................................................................................... 20

3.2.18.1 Ferrous field source .......................................................................................................................... 20

3.2.18.2 Eddy current field source .................................................................................................................. 20

3.2.18.3 Stray field source .............................................................................................................................. 21

3.2.19 Noise reduction........................................................................................................................................ 21

3.2.19.1 Airborne noise .................................................................................................................................. 21

3.2.19.2 Structureborne noise ......................................................................................................................... 21

3.2.19.3 Dynamic balancing ........................................................................................................................... 21

3.2.20 Provisions for dynamic balancing............................................................................................................ 21