1、AMSC N/A FSC 5925 INCH-POUND MIL-DTL-23928F 26 June 2008 SUPERSEDING MIL-DTL-23928E 30 March 2001 DETAIL SPECIFICATION PANELS, ELECTRICAL, POWER DISTRIBUTION AND MANUAL TRANSFER, CIRCUIT BREAKER TYPE This specification is approved for use by all Departments and Agencies of the Department of Defense.
2、 1. SCOPE 1.1 Scope. This specification covers high-impact (H.I.) shockproof and vibration proof, bulkhead mounted electrical power distribution and transfer panels using ALB, NLB, AQB, and NQB circuit breakers for feeder and branch circuit protection and control for alternating current (ac) and dir
3、ect current (dc) application on naval ships. 1.2 Classification. Power distribution and transfer panels covered by this specification are of the following types and classes, as specified (see 6.2). 1.3 Part or Identifying Number (PIN). The PIN will consist of the following: M23928/1-01 WT Military s
4、pecification Enclosure type (see 3.1 table I) Specification sheet number Dash number (see 3.1 table I) Type I - Power distribution (branch circuit protection and control) Type II - Manual transfer (bus transfer switching) Type III - Combination of types I and II. Class 1 - Dripproof (15 degrees and
5、45 degrees) Class 2 - Totally enclosed Class 3 - Watertight Class 4 - Submersible (15 foot) 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 spe
6、cification or recommended for 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 th
7、ey are listed. Comments, suggestions, or questions on this document should be addressed to: Defense Supply Center, Columbus, ATTN: DSCC-VAT, Post Office Box 3990, Columbus, Ohio 43218-3990 or by email CircuitProtectdla.mil. Since contact information can change, you may want to verify the currency of
8、 this address information using the ASSIST Online database at http:/assist.daps.dla.mil. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23928F 2 2.2 Government documents. 2.2.1 Specifications, standards, and handbooks. The following specific
9、ations, 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 (see 6 2). DEPARTMENT OF DEFENSE SPECIFICATIONS MIL-PRF-900 - Rubber Gasket Material, 45 Durometer H
10、ardness. MIL-S-901 - Shock Tests, H.I. (High Impact); Shipboard Machinery, Equipment and Systems, Requirements for. MIL-E-917 - Electric Power Equipment, Basic Requirements. MIL-DTL-1222 - Studs, Bolts, Screws and Nuts for Applications where a high degree of reliability is required; General Specific
11、ation for MIL-DTL-3661 - Lampholders, Indicator Lights, Indicator Light Housings, and Indicator-Light Lenses, General Specification for. MIL-L-3661/60 - Lampholder, Transformer, Light, Indicator, Style LH93 MIL-L-3661/61 - Lampholder, Lights, Indicator (Housing), Style LH94 MIL-L-3661/63 - Lampholde
12、r, Lights, Indicator (Housing), Style LH96 MIL-L-3661/65 - Lampholder, Lights, Indicator (Housing), Style LH98 MIL-DTL-15024 - Plates, Tags and Bands for Identification of Equipment. MIL-P-15024/5 - Plates, Identification. MIL-PRF-16173 - Corrosion Preventive Compound, Solvent Cutback, Cold-Applicat
13、ion MIL-T-16366 - Terminals, Electrical Lug and Conductor Splices, Crimp-Style MIL-DTL-17361 - Circuit Breaker Types, AQB/NQB, Air, Electric, Low Voltage, Insulated Housing, (Shipboard use), General Specification for. MIL-C-17588 - Circuit Breakers (Automatic -ALB-1) and Switch Toggle (Circuit Break
14、er, Non-Automatic - NLB-1) Air, Insulated Housing, 125 Volts and Below, A.C. and D.C., (Naval Shipboard Use) MIL-DTL-24643 - Cable and Cords, Electric, Low Smoke, For Shipboard Use, General Specification for MIL-DTL-24643/15 - Cable, Electrical, 1,000 Volts, Type LSDSGU MIL-DTL-24643/16 - Cable, Ele
15、ctrical, 1,000 Volts, Type LSTSGU (Including Variation LSTSGA) MIL-I-24768 - Insulation, Plastics, Laminated, Thermosetting, General Specification for MIL-I-24768/1 - Insulation, Plastic Laminated, Thermosetting, Glass-Cloth, Melamine-Resin (GME) MIL-I-24768/6 - Insulation, Plastic, Laminated, Therm
16、osetting, Glass-Mat, Polyester-Resin (GPO N-3) MIL-T-55156 - Terminals, Lug; Splices, Conductor; Screw Type, General Specification for DEPARTMENT OF DEFENSE STANDARDS MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for Electric and Electronic Equipment. MIL-STD-167-1 - Mechanical
17、Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited.) MIL-STD-810 - Environmental Engineering Considerations and Laboratory Tests. DEPARTMENT OF DEFENSE HANDBOOKS MIL-HDBK-2036 - Electronic Equipment Specifications, Preparation of. (Copies of these documents ar
18、e available online at http:/assist.daps.dla.mil/quicksearch/ or http:/assist.daps.dla.mil or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-
19、MIL-DTL-23928F 3 2.2.2 Other Government documents, drawings, and publications. The following other Government documents, drawings, and publications form a part of this document to the extent specified herein. Unless otherwise specified, the issues are those cited in the solicitation or contract. NAV
20、AL SEA SYSTEMS COMMAND (Ship Systems) NAVSEA S9074-AQ-GIB-010/248 - Requirements for Welding and Brazing Procedure and Performance Qualification. NAVSEA S9074-AR-GIB-010/278 - Requirements for Fabrication Welding and Inspection, and Casting Inspection and Repair for Machinery, Piping, and Pressure V
21、essels. (Copies of these documents are available from http:/www.navsea.navy.mil, or the Commander Naval Sea Systems Command, SEA 05M2, 1333 Isaac Hull Avenue SE Stop 5160, Washington Navy Yard DC 20376-5160). 2.3 Non-Government publications. The following documents form a part of this document to th
22、e extent specified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM) ASTM B98/B98M - Copper-Silicon Alloy Rod, Bar, and Shapes. ASTM B187/B187M - Copper, Bus Bar, Rod, and Sha
23、pes and General Purpose Rod, Bar and Shapes. ASTM B371 - Rod, Copper-Zinc-Silicon Alloy. ASTM B411/B411M - Copper-Nickel-Silicon Alloy Rod and Bar. ASTM B700 - Standard Specification for Electrodeposited Coatings of Silver for Engineering use. ASTM D5948 - Compounds, Molding, Thermosetting. (Copies
24、of this document are available online at http:/www.astm.org or from the American Society for Testing Materials, 100 Barr Harbor Drive, West Conshohocken. PA 19428-2959). INTERNATIONAL ORGANIZATION FOR STANDARDS (ISO) ISO 10012-1 - Equipment, Quality Assurance Requirements for Measuring - Part 1: Met
25、rological Confirmation System for Measuring Equipment. (A copy of this document is available from http:/ or the International Organization for Standardization (ISO), 1, ch. de la Voie-Creuse, Case postale 56, CH-1211 Geneva 20, Switzerland, Tel.: +41 22 749 02 22, Fax: +41 22 749 01 55. NATIONAL CON
26、FERENCE OF STANDARDS LABORATORIES (NCSL) NCSL Z540.1 - Laboratories, Calibration, and Measuring and Test Equipment. (A Copy of this document is available from http:/www.ncsli.org/ or the National Conference of Standards Laboratories (NCSL), 2995 Wilderness Place Suite 107, Boulder, Colorado, 80301-5
27、404, United States). SOCIETY OF AUTOMOTIVE ENGINEERS, INC. (SAE) SAE AMS-QQ-S-763 - Steel Bars, Wire, Shapes, and Forgings, Corrosion Resistant. (Copies of these documents are available online at http:/www.sae.org/ or from the Society of Automotive Engineers, 400 Commonwealth Drive, Warrendale, PA 1
28、5096-0001.) 2.4 Order of precedence. In the event of a conflict between the text of this document and the references cited herein (except for related specification sheets), the text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unles
29、s a specific exemption has been obtained. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23928F 4 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the applicable s
30、pecification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.1.1 Special panels. Where panels covered by the specification sheets do not meet the needs of a given application, the requirements of this specific
31、ation shall apply; the specific details, however, are covered by the contractors drawing and the contract of order (see 6.2). In the event of any conflict between requirements of this specification, the contract drawing, or the ordering data, the order of precedence shall be: a. Ordering data. b. Th
32、is specification. c. Contractors drawing. 3.2 First article. When specified, a sample shall be subjected to first article inspection (see 6.4) in accordance with 4.2. 3.3 Parts and materials. Parts and materials shall be as specified herein. When not specified, they shall be selected in accordance w
33、ith MIL-E-917, or shall be reviewed by the contracting activity in accordance with MIL-E-917 (see 3.3.15). 3.3.1 Metals. Metals shall be of a corrosion-resistant type or shall be treated to resist corrosion in accordance with MIL-E-917. Dissimilar metals in contact with each other, shall be selected
34、 in accordance with MIL-E-917. 3.3.2 Nonmetallic materials. Nonmetallic materials shall be nonflammable, nontoxic, and fungus-inert in accordance with MIL-E-917. 3.3.3 Recycled, recovered, or environmentally preferable materials. Recycled, recovered, or environmentally preferable materials should be
35、 used to the maximum extent possible provided that the material meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.3.4 Insulation. 3.3.4.1 Insulating material. Insulating material for bus supports, spacers, and other fabricated p
36、arts shall be type GME in accordance with MIL-I-24768/1 or type GPO-N3 in accordance with MIL-I-24768 and MIL-I-24768/6. Molded parts shall be made from molding compounds in accordance with ASTM D5948 and MIL-E-917. Insulating material used to obtain electrical clearance shall be not less than .125
37、inch (3.18 mm) thick when there is a possibility of impact or abrasion to the insulating material resulting from H.I. shock or vibration; otherwise a thickness of .0625 inch (1.59 mm) is allowable. The insulating material shall be secured by through bolting. 3.3.4.2 Insulation distances. Insulation
38、distances in air and surface creepage distances on insulating materials for all live parts shall be in accordance with MIL-E-917. Panels having clearance distances for rigid construction that will break before measurable distortion can occur, shall be in accordance with MIL-E-917. 3.3.4.3 Distortion
39、 distance. All parts subject to distortion or movement during shock or vibration shall conform to the minimum distances shown in table I. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23928F 5 TABLE I. Clearance and creepage for open constr
40、uction. Minimum creepage and clearance distances in inches 1/ 2/ Clearance Creepage Molded plastic surface 3/ Machined laminated plastic surfaces Maximum panel voltage Between live parts of opposite polarity and live parts to ground through free air Between live parts of opposite polarity and live p
41、arts to ground Between live parts of opposite polarity Live parts to ground 125 V ac/V dc .25 ( 6.35) .50 (12.70) .75 (19.05) .50 (12.70) 250 V ac/V dc .50 (12.70) .75 (19.05) 1.75 (44.45) .75 (19.05) 600 V ac .75 (19.05) 1.00 (25.40) 2.00 (50.80) 1.00 (25.40) 1/ Millimeters are in parentheses. 2/ N
42、ot applicable to circuit breakers or molded plastic plug-in mounting bases for circuit breakers. 3/ If molded plastic surface finish is disturbed, creepage distances for machined laminated plastic surfaces shall apply (flash removal is not considered as disturbing finishes.) 3.3.5 Circuit breakers.
43、AQB and NQB circuit breakers shall be in accordance with MIL-DTL-17361. ALB and NLB circuit breakers shall be in accordance with MIL-C-17588. Unless otherwise specified (see 6.2), circuit breakers shall not be furnished with the panels. 3.3.5.1 Wiring connections. Wiring connections for circuit brea
44、ker attachments, such as shunt trip, undervoltage, and auxiliary switches shall be made to wiring terminal boards mounted in the panel. 3.3.5.1.1 Terminal boards. Terminal boards shall be in accordance with MIL-E-917. 3.3.6 Mounting bases and blocks for circuit breakers. Unless otherwise specified (
45、see 3.1 and 6.2), mounting bases or blocks, as applicable, shall be furnished for the maximum number of breakers that may be installed in the panel. 3.3.6.1 Type ALB and NLB bases. Mounting bases for type ALB and NLB circuit breakers shall be in accordance with MIL-C-17588. The mounting bases shall
46、be arranged to permit circuit breaker installation and removal from the front of the panel. 3.3.6.2 Type AQB and NQB bases and blocks. Mounting bases and blocks for type AQB and NQB circuit breakers shall be in accordance with MIL-DTL-17361. Mounting bases or blocks shall be arranged to permit insta
47、llation and removal of circuit breakers and electrical connections from the front of the panel. 3.3.7 Indicator lights. When specified (see 3.1), indicator lights in accordance with MIL-DTL-3661 shall be furnished complete with lenses (globes) (see 3.3.7.1) and applicable lamps as follows: Voltage I
48、ndicator lights Type Specification sheet 117 volts alternating current (V ac) 450 V ac 120 volts direct current (V dc) 240 V dc LH93/3 LH94/3 LH98/3 LH93/4 LH94/4 LH98/4 LH96/5 LH96/6 MIL-L-3661/60 MIL-L-3661/61 MIL-L-3661/65 MIL-L-3661/60 MIL-L-3661/61 MIL-L-3661/65 MIL-L-3661/63 MIL-L-3661/63 Prov
49、ided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-DTL-23928F 6 3.3.7.1 Lenses. The indicator light lenses shall be color coded to designate a particular application as follows: Color Signification Red Green Clear, etched (white) Blue Yellow Danger or emergency Normal condition Power on; power available or ground detector Circui
