1、Comments, suggestions, or questions on this document should be addressed to: Commander, Naval Sea Systems Command, ATTN: SEA 05S, 1333 Isaac Hull Avenue, SE, Stop 5160, Washington Navy Yard DC 20376-5160 or emailed to CommandStandardsnavy.mil, with the subject line “Document Comment”. Since contact
2、information can change, you may want to verify the currency of this address information using the ASSIST Online database at https:/assist.dla.mil. AMSC N/A FSC 5925 INCH-POUND MIL-DTL-32483 8 November 2013 DETAIL SPECIFICATION SWITCHGEAR, POWER, HARD-MOUNTED, MEDIUM VOLTAGE, NAVAL SHIPBOARD Provided
3、 by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32483 ii 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 docu
4、ments, drawings, and publications . 3 2.3 Non-Government publications . 4 2.4 Order of precedence . 5 3. REQUIREMENTS . 5 3.1 First article . 5 3.2 General requirements . 5 3.3 Safety . 6 3.3.1 Accidental contact 6 3.3.2 Tag-out requirements . 6 3.3.3 Maintenance test points 6 3.4 Construction requi
5、rements. 6 3.4.1 Materials and coatings 6 3.4.1.1 Polyvinyl chloride (PVC) . 6 3.4.1.2 Non-preferred component materials . 6 3.4.1.3 Coatings. . 6 3.4.1.3.1 Painting. 6 3.4.1.3.1.1 Enamel 6 3.4.1.3.1.2 Powder coating . 6 3.4.1.3.1.3 Grounding fasteners with paint . 6 3.4.1.3.2 Chemical conversion co
6、atings 6 3.4.1.3.3 Non-preferred component coatings 6 3.4.1.3.4 Conformal coating 7 3.4.2 Switchboard structure. 7 3.4.2.1 Structural materials . 7 3.4.2.2 Compartmentation 7 3.4.2.3 Assembly 7 3.4.2.4 Hinging . 7 3.4.2.5 Layout. 7 3.4.2.6 Lifting . 7 3.4.2.7 Removable sheets and panels . 7 3.4.2.8
7、Welding 7 3.4.2.9 Guard rails 7 3.4.2.9.1 Removable guard rails 8 3.4.2.10 Top panel 8 3.4.2.11 Door interlocks . 8 3.4.2.12 Accessibility. 8 3.4.2.12.1 Space 8 3.4.2.12.2 Servicing . 8 3.4.2.13 Louvers and other openings 8 3.4.2.14 Control cabinet/compartment . 8 3.4.2.14.1 Control cabinet/compartm
8、ent location 8 3.4.2.14.2 Control cabinet/compartment shock isolation 8 3.4.2.15 Thermal imaging windows . 8 3.4.2.16 Arc-resistant design (pressure relief arc flaps) . 9 3.4.3 Insulation. . 9 3.4.3.1 Insulating material 9 3.4.3.2 Insulation distances (creepage and clearance) 9 Provided by IHSNot fo
9、r ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32483 iii 3.4.4 Fastener locking devices 9 3.4.4.1 Acceptable locking devices 9 3.4.4.2 Prohibited locking devices . 9 3.4.5 Wiring of control and instrument circuits. . 10 3.4.5.1 Control and instrument cable types
10、 10 3.4.5.2 Wire and terminal marking . 10 3.4.5.3 Securing of control wiring 10 3.4.5.4 External control cable connections . 10 3.4.5.5 Wire end connectors . 10 3.4.5.6 Fiber optic connections. 10 3.4.5.6.1 Fiber optic cables 10 3.4.5.6.2 Fiber optic connectors 10 3.4.6 Power cables 11 3.4.6.1 Secu
11、ring of power cables 11 3.4.7 Bus bars and bus bar joint connections. . 11 3.4.7.1 Bus bar material 11 3.4.7.2 Bus bar sizes . 11 3.4.7.2.1 Optional bus bar geometry 13 3.4.7.3 Bus bar capacity . 13 3.4.7.4 Bus bar forming 13 3.4.7.5 Bus bar insulation . 13 3.4.7.6 Bus bar joints. . 13 3.4.7.6.1 Wel
12、ding or brazing . 13 3.4.7.6.2 Bolted bus bar joint insulation 13 3.4.7.6.3 Connection hardware 13 3.4.7.6.3.1 Number of bolts/tightening of bolts for bus bar joints 13 3.4.7.6.3.2 Tightening nuts for bus bar joints . 13 3.4.7.6.4 Holes in bus bars 14 3.4.7.6.5 Preparation of bus bar joints . 14 3.4
13、.7.6.6 Silver surfacing of bus bar joints 15 3.4.7.7 Bus supports . 15 3.4.8 Identification plates, information plates, and marking . 15 3.4.8.1 Location 15 3.4.8.2 Size . 15 3.4.8.2.1 Thickness 15 3.4.8.2.2 Shape 15 3.4.8.3 Information . 15 3.4.8.4 Abbreviations . 16 3.4.8.5 Installation 16 3.4.8.6
14、 Detail application requirements 16 3.4.8.7 Blank plates 16 3.4.8.8 Instrument identification 16 3.4.8.9 Fuse marking 16 3.4.8.10 Marking switchboard buses 16 3.4.8.11 Phase identification 16 3.4.8.12 Bus bars 16 3.4.8.13 Circuit breaker information plate . 16 3.4.8.14 Programmable items . 17 3.5 En
15、vironmental performance requirements. 17 3.5.1 Temperature . 17 3.5.1.1 Ambient temperature 17 3.5.1.2 Temperature rise . 17 3.5.2 Shock 17 3.5.2.1 Shock test procedures and test results 17 3.5.3 Vibration 17 3.5.4 Electromagnetic interference (EMI) . 17 Provided by IHSNot for ResaleNo reproduction
16、or networking permitted without license from IHS-,-,-MIL-DTL-32483 iv 3.5.4.1 EMI test procedures and results 17 3.5.5 Water spray 17 3.5.6 Water mist 17 3.5.7 Flame resistance . 17 3.5.8 Noise 17 3.6 Electrical and other performance requirements. 17 3.6.1 Momentary and short-time withstand ratings
17、. 17 3.6.2 Electrical interface characteristics 17 3.6.3 Rated maximum voltage 17 3.6.4 Nominal operating voltage . 18 3.6.5 Lightning impulse withstand voltage (BIL) . 18 3.6.6 Power frequency withstand voltage for primary conductors 18 3.6.7 Power frequency withstand voltage for conductors less th
18、an 1 kV 18 3.6.8 Voltage spike 18 3.6.9 Insulation resistance (low voltage control circuits) 18 3.6.10 Grounding. . 18 3.6.10.1 System grounding . 18 3.6.10.2 Bond strap 18 3.6.10.3 Grounding considerations for powder coat/chemical conversion coating applications 18 3.6.10.4 Grounding considerations
19、 for drawout-type potential transformers . 18 3.6.10.5 Maintenance grounding 18 3.6.10.5.1 Maintenance test points/ground studs . 19 3.6.11 Ground fault monitoring. 19 3.6.12 Nominal control voltage . 19 3.6.13 Phase rotation . 19 3.6.14 Maintainability . 19 3.7 Components and devices. . 19 3.7.1 Ci
20、rcuit breakers, stationary elements (cradles), and lifting devices. 19 3.7.1.1 Circuit breaker type 19 3.7.1.2 Circuit breaker trip coil circuits 19 3.7.1.3 Interchangeability . 20 3.7.1.4 Charge motor protection . 20 3.7.1.5 Circuit breaker lifting device 20 3.7.1.6 Circuit breaker rack-in and rack
21、-out . 20 3.7.1.6.1 Circuit breaker positions in or on cradle for rack-in and rack-out and racking position indicator 20 3.7.1.6.1.1 Connect position . 20 3.7.1.6.1.2 Test position 20 3.7.1.6.1.3 Disconnect position . 20 3.7.1.6.1.4 Withdrawn position . 20 3.7.1.6.2 Withdrawal interlocks . 20 3.7.1.
22、6.3 By-pass switch and truck-operated cell (TOC ) switch 20 3.7.1.6.4 Secondary disconnects 20 3.7.1.6.5 Shutters . 20 3.7.1.6.6 Mechanical endurance racking . 20 3.7.1.7 Circuit breaker cradle or lifting device strength . 20 3.7.1.8 Anti-rolling (normal vertical/horizontal orientation) 21 3.7.1.9 I
23、nclined operation . 21 3.7.1.9.1 Electrical cycling 21 3.7.1.9.2 Opening and closing times 21 3.7.1.9.3 Anti-rolling . 21 3.7.2 Arc fault detectors 21 3.7.3 Uninterruptible power supply (UPS) 21 3.7.3.1 UPS hold up time . 21 3.7.4 Corona detection maintenance equipment/detection level . 21 3.7.5 Par
24、tial discharge detection maintenance equipment . 21 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-32483 v 3.7.6 Capacitive voltage indicating systems . 21 3.7.7 Synchronizing and load control equipment 21 3.7.8 Generator space heater circui
25、t 22 3.7.9 Metering and control options . 22 3.7.9.1 HMI 22 3.7.9.1.1 Display pages 22 3.7.9.1.1.1 Color conventions . 22 3.7.9.1.2 Touch screen . 22 3.7.9.1.2.1 Viewing requirements. 22 3.7.9.1.3 Software 23 3.7.9.1.4 Redundancy 23 3.7.9.2 Discrete meters . 23 3.7.9.3 Digital indicators 23 3.7.9.3.
26、1 Digital readout circuitry 23 3.7.9.3.2 Digital indicator flicker 23 3.7.9.3.3 Isolation 23 3.7.9.4 Controls 23 3.7.9.4.1 Controls operations in each control mode 23 3.7.10 Transformers. . 23 3.7.10.1 Low voltage transformers . 23 3.7.10.2 Medium voltage transformers. 23 3.7.10.2.1 Medium voltage c
27、urrent transformers . 23 3.7.10.2.1.1 Alternative Rogowski medium voltage current transformers . 24 3.7.10.2.1.1.1 Primary converter module . 24 3.7.10.2.2 Medium voltage potential transformers 24 3.7.10.2.2.1 Grounding of drawout-type potential transformers . 24 3.7.10.2.2.2 Alternatives to medium
28、voltage potential transformers 24 3.7.11 Resistors and rheostats . 24 3.7.12 Low voltage fuses and terminal blocks 24 3.7.12.1 Fuse mounting 24 3.7.12.1.1 Dead-front fuseholders . 24 3.7.13 Medium voltage fuses and fuse accessories . 24 3.7.14 Terminal boards . 24 3.7.15 Switches, disconnecting devi
29、ces, and transfer switches . 25 3.7.16 Fans 25 3.7.16.1 Fan monitoring system . 25 3.7.16.2 Fan shutdown during water mist 25 3.7.17 Indicator lights . 25 3.7.18 Non-contact thermal sensors 25 3.7.19 Protective relays . 26 3.7.20 Tool storage 26 4. VERIFICATION 26 4.1 Classification of inspections 2
30、6 4.2 First article inspection 26 4.3 Conformance inspection 26 4.4 Examination and test methods. 26 4.4.1 Test equipment . 26 4.4.2 Test conditions . 26 4.4.3 Detailed inspection. 29 4.4.3.1 General exam 29 4.4.3.2 Verification of protective functions 29 4.4.3.3 Maintainability . 29 4.4.3.4 Circuit
31、 breaker/stationary element (cradle)/lifting device tests. . 29 4.4.3.4.1 Circuit breaker positions in or on cradle for rack-in/rack-out. 29 4.4.3.4.1.1 Rack-out 29 4.4.3.4.1.1.1 Test position. . 30 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL
32、-DTL-32483 vi 4.4.3.4.1.1.1.1 Main contact de-energization, rack-in/rack-out position indicator operation, and cell switch operation 30 4.4.3.4.1.1.1.2 Electrical cycling and mechanical position indicator operation 30 4.4.3.4.1.1.1.3 Manual cycling and mechanical position indicator operation . 30 4.
33、4.3.4.1.1.1.4 Anti-rolling verification 30 4.4.3.4.1.1.2 Disconnect position. 30 4.4.3.4.1.1.2.1 Rack-in/rack-out position indicator operation and cell switch operation 30 4.4.3.4.1.1.2.2 Manual cycling and mechanical position indicator operation . 30 4.4.3.4.1.1.2.3 Anti-rolling verification 30 4.4
34、.3.4.1.1.3 Withdrawn position. 30 4.4.3.4.1.1.3.1 Anti-rolling verification 30 4.4.3.4.1.2 Rack-in 31 4.4.3.4.1.2.1 Disconnect position . 31 4.4.3.4.1.2.2 Test position 31 4.4.3.4.1.2.3 Connect position 31 4.4.3.4.2 Circuit breaker mechanical endurance racking . 31 4.4.3.4.3 Circuit breaker stationa
35、ry element or lifting device strength 31 4.4.3.4.4 Inclined operation . 31 4.4.3.4.4.1 Electrical cycling/verification of opening and closing times 31 4.4.3.4.4.2 Anti-rolling . 32 4.4.3.5 Grounding of instrument transformer case . 32 4.4.3.6 Electrical interface characteristics. . 32 4.4.3.6.1 Volt
36、age and frequency tolerance 32 4.4.3.6.2 Emergency condition 32 4.4.3.7 Power frequency withstand voltage for primary conductors 32 4.4.3.8 Power frequency withstand voltage for conductors less than 1 kV 32 4.4.3.9 BIL . 32 4.4.3.10 Corona test 32 4.4.3.11 Partial discharge test . 32 4.4.3.12 Insula
37、tion resistance. 32 4.4.3.12.1 Test setup 32 4.4.3.12.2 Pass/fail criteria 32 4.4.3.13 EMI test 33 4.4.3.14 Voltage spike testing 33 4.4.3.15 Temperature rise. 33 4.4.3.15.1 Switchboard sample(s) . 33 4.4.3.15.2 Pass/fail criteria 33 4.4.3.15.3 Test chamber 33 4.4.3.15.4 Sensors and sensor locations
38、 33 4.4.3.15.4.1 Ambient temperature sensors 33 4.4.3.15.4.2 Compartment temperature sensors. . 33 4.4.3.15.4.2.1 Compartments other than bus compartments 33 4.4.3.15.4.2.2 Bus compartments . 34 4.4.3.15.5 Temperature stabilization and temperature rise determination . 34 4.4.3.15.6 Circuit breaker l
39、oading and equipment energization 34 4.4.3.15.6.1 One-unit switchboard section 34 4.4.3.15.6.2 Multiple-unit switchboard section. 34 4.4.3.15.7 Voltage regulator loads . 34 4.4.3.15.8 Thermal imaging windows and non-contact thermal sensor data check . 34 4.4.3.16 Momentary withstand . 34 4.4.3.17 Sh
40、ort-time withstand 34 4.4.3.18 High-impact shock . 35 4.4.3.18.1 Test setup 35 4.4.3.18.2 Principal function pass/fail criteria . 35 4.4.3.18.3 Disposal of shock-tested equipment . 36 4.4.3.18.4 Extension of shock tests . 36 Provided by IHSNot for ResaleNo reproduction or networking permitted withou
41、t license from IHS-,-,-MIL-DTL-32483 vii 4.4.3.19 Vibration test 36 4.4.3.20 Noise. 36 4.4.3.21 Water spray. 36 4.4.3.21.1 Pass/fail criteria 37 4.4.3.22 Water mist 37 4.4.3.22.1 Pass/fail criteria 37 4.4.3.23 Flame test . 37 4.4.3.24 Arc-resistant design (pressure relief flaps) . 37 5. PACKAGING .
42、37 5.1 Packaging . 37 6. NOTES . 37 6.1 Intended use . 37 6.2 Acquisition requirements . 37 6.3 Definitions . 38 6.3.1 Corona 38 6.3.2 Electronic devices 38 6.3.3 Partial discharge (PD) 38 6.4 Subject term (key word) listing. . 39 LIST OF TABLES TABLE PAGE TABLE I. Bus bar sizes. . 12 TABLE II. Bolt
43、ing of connection bars/diameter and number of bolts. 14 TABLE III. Torque on bus bar joints. 15 TABLE IV. Voltage requirements based on rated maximum voltage. . 18 TABLE V. First article and conformance inspection and schedule. . 27 Provided by IHSNot for ResaleNo reproduction or networking permitte
44、d without license from IHS-,-,-MIL-DTL-32483 1 This specification is approved for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers electrical power dead-front, deck-mounted, medium voltage switchgear for naval shipboard use. The switchge
45、ar is hard-mounted and requires the use of shock-hardened equipment with exceptions as detailed below. These requirements cover switchgear assemblies containing, but not limited to, such devices as medium voltage vacuum circuit breakers (VCBs), other interrupting devices, switches, control, instrume
46、ntation and metering, and protective and regulating equipment. 2. APPLICABLE DOCUMENTS 2.1 General. The documents listed in this section are specified in sections 3, 4, or 5 of this specification. This section does not include documents cited in other sections of this specification or recommended fo
47、r additional information or as examples. While every effort has been made to ensure the completeness of this list, document users are cautioned that they must meet all specified requirements of documents cited in sections 3, 4, or 5 of this specification, whether or not they are listed. 2.2 Governme
48、nt documents. 2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract. COMMERCIAL ITEM
49、 DESCRIPTIONS A-A-208 - Ink, Marking, Stencil, Opaque (Porous And Non-Porous Surfaces) A-A-59125 - Terminal Boards, Molded, Barrier Screw and Stud Types and Associated Accessories A-A-59125/2 - Terminal Boards, Molded, Barrier Screw Type, Class 38TB A-A-59125/9 - Terminal Boards, Molded, Barrier Stud Type, Class 3TB A-A-59781 - Light Emitting Diodes for Use as Indicator Lights DEPARTMENT OF
