1、MIL-P-24395 (SHIPS) 2 May 1972 MILITARY SPECIFICATION PANELS, GROUND DETECTOR, GENERAL SPECIFICATION FOR 1. SCOPE h and direct current (d.c.) ground detector panels. 1.1 This specification covers the general requirements for alternating current (a.c.) 2. APPLICABLE DOCUMENTS O i 2.1 The following do
2、cuments of the issue in effect on date of invitati request for proposal, form a part of this specification to the extent specif SPECIFICATIONS FEDERAL QQ-B-613 - Brass, Leaded and Non-Leaded, Flat Products (Plate, and Strip). n for bids or ed herein. Bar, Sheet MILITARY MIL-M-14 - Molding Plastics,
3、and Molded Plastics, Thermosetting. MIL-1-631 - Insulation, Electrical, Synthetic-Resin Composition, Nonrigid. MIL-S-901 - Shock Tests, H.I. (High Impact) Shipboard Machinery, Equipment MIL-E-917 - Electric Power Equipment Basic Requirements for Naval Shipboard MIL-E-2036 - Enclosures for Electric a
4、nd Electronic Equipment, Naval MIL-T-7928 - Terminals, Lug: Splices, Conductor, Crimp Style, Copper, MIL-P-15024 - Plates, Identification - Information and Marking for Identi- fication of Electrical, Electronic and Mechanical Equipment. MIL-P-15024/5 - Plates, Identification. MIL-P-15037 - Plastic S
5、heet, Laminated Thermosetting, Glass-Cloth Melamine- MIL-E-17555 - Electronic and Electrical Equipment, Accessories, and Repair MIL-P-24395/1 - Ground Detector Panel, 120-Volt (Symbol 1005.1) and 450-Volt and Systems, Requirements for. use. Shipboard. General Specification For. Resin. Parts; Packagi
6、ng and packing of. (Symbol 1005.2) A.C. Three Phase for 60 or 400 Hertz, Dripproof. (Symbol 1005.4) D.C. Dripproof. MIL-P-24395/2 - Ground Detector Panel, 120-Volt (Symbol 1005.3) and 240-Volt MIL-1-45208 - Inspection System Requirements. MIL-T-55164 - Terminal Boards, Molded, Barrier Screw and Stud
7、 Type. STANDARDS MILITARY MIL-STD-108 - Definitions of and Basic Requirements for Enclosures for MIL-STD-167 - Mechanical Vibrations of Shipboard Equipment. MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-278 - Welding and Inspection of Machinery, Piping and Pressur
8、e Electric and Electronic Equipment. Vessels for Ships of the U.S. Navy. (Copies of specifications, standards, drawings and publications required by suppliers in connection with specific procurement functions should be obtained from the procuring activity or as directed by the contracting officer.)
9、2.2 Other publications. The following documents form a part of this specification to the extentspecified herein. Unless otherwise indicated, the issue in effect on date of invitation for bids or request for proposal shall apply. . NATIONAL BUREAU OF STANDARDS Handbook H28-Screw Thread Standard for F
10、ederal Services. FSC 6110 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24395 (SHIPS) (Application for copies should be addressed to the Superintendent of Documents, Govern- ment Printing Office, Washington, D. C. 20402.) UNIFORM CLASSIFICATI
11、ON COMMITTEE Uniform Freight Classification Rules. (Application for copies should be addressed to the Uniform Classification Committee, 202 Union Station, 516 West Jackson Boulevard, Chicago, Illinois 60606.) NATIONAL FIRE PROTECTION ASSOCIATION ASA CI - National Electric Code. (Application for copi
12、es should be addressed to the National Fire Protection Association, 60 Batterymarch Street, Boston, Mass., 02110.) (Technical society and technical association specifications and standards are generally available for reference from libraries. They are also distributed among technical groups and usin
13、g Federal agencies.) 3, REQUIREMENTS panel of each symiiii numberundera contract or order shall be inspected as specified in 4.2 (see 6.3). 3.1 Sample for first article inspection. Prior to beginning production, a sample 3.1.1 The first article sample panel, indicator lights, fuseholders, switches,
14、termi- nal boards, resistorsand wiring shall be furnished complete as specified on the individual specification sheets. 3.2 Specification sheets. The individual panel requirements shall be as specified herein and in accordance with the applicable specification sheets. In the event of any conflict be
15、tween requirements of this specification and the specification sheets, the latter shall govern. 3.3 Materials. Materials shall be as specified (see 6.2) and shall conform to MIL- E-917. Material not definitely specified shall be of the quality best suited for the purpose intended. 3.3.1 Restrictive
16、material. Flammable or explosive material, or material which can produce toxic or suffocating fumes shall not be used. 3.3.2 Insulation material. Laminated plastics shall be type GME in accordance with MIL-P-15037. Compoundsused-for molding mounting bases, parts, and so forth, shall conform to Type
17、MAI-60 or Type “1-30 of MIL-M-14. 3.4 Milling, countersinking or tapping of metal parts shall be accomplished before plating or finish is applied. conforming with uniband American National Screw Threads as specified in Handbook H-28. 3.5 Threaded arts. Unless otherwise specified, threads shall be ri
18、ght hand, Class 2 3.5.1 Self-tapping devices and sheet metal screws shall not be used in the assembly of the panels. exposed, sg2yltage. test of The ground detector panels shall be capable 3.20.2 Dielectric smooth and , holes t 1 he S shall a 3 Provided by IHSNot for ResaleNo reproduction or network
19、ing permitted without license from IHS-,-,-MIL-P-24395 (SHIPS) 3.20.3 Grounding. Detector panels shall be designed to be free of shock hazard to the maximum practical extent, The design and construction of the panels shall be such that all exposed metal parts or other electrically conductive materia
20、l (panel cover and box, switches, indicator lights, fuseholders) are at ground (ships hull) potential at all times, The exposed metal portions both interior and exterior of electrical parts such as switches, indicator lights and fuseholders shall be in physical contact with or electrically connected
21、 to the grounded panel. A ground wire shall be provided between the cover and the box as shown on the individual specification sheet so that the cover remains grounded when removed from the box. 3.20.4 Insulation resistance. The ground detector panels shall be capable of with- standing the. insulati
22、on resistance test of 4.5.5. The insulation resistance shall be not less than 200 Megohms. carrying partsus connection points, and terminals) shall not exceed 45OC. above an ambient 3.20.5 Heat. When subjected to the heat test of 4.5.6, the temperature rise in current room temperature of 25OC. and t
23、he air temperature within the panel shall not exceed 65OC. 3.21 Drawings. Drawings shall consist of manufacturers drawings, (certified by the cognizant Government inspector as complying with the requirements of this specification). The certification shall be documented on the drawing as a matter of
24、record. Drawings shall carry manufacturers numbers and the number of this specification. (Formal approval and validating signatures for manufacturers drawings will not be required nor will NAVSHIPS drawing numbers be assigned.) 3.21.1 Manufacturers drawings shall be furnished and shall include the f
25、ollowing: (a) Outline, not necessarily to scale, of the front; side, Cross sectional, and top views of the panels, giving dimensions and other essential details. In the interest of clarity, views in addition to those specified may be shown. (b) List of material. (c) Descriptive data of the equipment
26、, which shall include the degree of enclosure. (d) Weight of the equipment, center of gravity, and mounting dimensions. (e) A list of notes and references pertinent to the basic design of the (f) A list of notes pertinent to the tests conducted in accordance with section equipment. 4 of this specifi
27、cation. (9) Title block. article sample has successfully passed the tests of this specification shall immediately place on record a set of prints of the drawing used for manufacturing the parts with the following: 3.21.2 Drawing distribution. The manufacturer, upon being advised that the first (a) O
28、ne set for file with the local Government inspector. (b) One set for file with the Naval Ship Engineering Center, Department (c) One set for file with the Contracting Officer, Ships Parts Control Center, (d) One set for file with the Commander, Defense General Supply Center, of Navy, Hyattsville, Ma
29、ryland 20782. Mechanicsburg, Pennsylvania 17055. Richmond,. Virginia 23212. plate in accordance with tmof MIL-P-15024. The markings shall be engraved on the 3.22 Identification plates. The ground detector panels shall have an identification cover in accordance with the individual specification sheet
30、s and shall be depressed in the metal to provide permanent identification. The identification plate shall contain the following information: Name of the item. Voltage. Symbol number. Military part number. Specification sheet number. Federal stock number. Contract number. Manufacturers (Prime contrac
31、tor) name or identificat MIL-P-15024/5. 3.22.1 Identification plates shall be designed for severe serv ion. .ice in accordance with 4 “ Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24395 (SHIPS) 3.23 Paintin . Painting and protection against
32、 corrosion shall be in accordance with MIL-E-917, or as s:ecified (see 6.2). 3.24 Workmanship. The workmanship shall be first class in every respect. 4. QUALITY ASSURANCE PROVISIONS 4.1 Responsibility for ins ection. Unless otherwise specified in the contract or pur- chase order, the supplierT resLo
33、nsible for the performance of all inspection requirements as specified herein. Except as otherwise specified in the contract or order, the supplier may use his own or any other facilities suitable for the performance of the inspection re- quirements specified herein, unless disapproved by the Govern
34、ment. The Government reserves the right to perform any of the inspections set forth in the specification where such in- spections are deemed necessary to assure supplies and services conform to prescribed requirements. 4.1.1 Ins ection system. The inspection system which the supplier is required to
35、maintain, as prEvided ininspection clause of the contract or order, shall be in accord- ance with MIL-1-45208 (see 6.5). subjected toeexamination and test specified in Table I. 4.2 First article inspection. The sample(s) for First article inspection shall be Table I - First article inspection. I Ins
36、pection Examination Dielectric Insulation Heat Enclosure Shock Vibration Salt spray Creepage and clearance Requirement paragraph 3.2, 3.19, 3.23, 3.24 3.20.2 3.20.4 3.20.5 3.18 . 3.14 3.13 3.15 3.20.1 Test paragraphpl 4.4 4.5.2 4.5.5 4.5.6 4.5.1 4.5.3 4.5.4 4.5.7 4.5.8 4.2.1 Redesign of panel. Redes
37、ign of a panel, once the manufacturer has established the panel de-aiiatter of record, shall require resubmission of a sample for first article inspection. the examination of 4.4, the efhs of enclosure test of 4.5.1 and the dielectric test of 4.5.2. 4.3 Quality conformance ins ection. Quality confor
38、mance inspection shall consist of 4.3.1 Sampling. identical numberof panels of each symbol number on contract or order. A random sample*erof each symbolall be selecterin accordancewith Table 1-m 4.3.1.2 Sam lin for examination and effectiveness of enclosure and dielectric tests. each inspection lot
39、and shall be subjected to the examination and tests specified in 4.3. Any panel containing one or more defects and any panel failing in one or more test shall not be offered for delivery. If the number of such defective panels in any sample exceeds the acceptance number for the sample, the lot repre
40、sented by the sample shall not be offered for acceptance. 4.3.1.1 Lot. For the purpose of sampling, a lot shall be considered to be the Table II - Sampling for quality conformance inspection. t Number of panels in Number of papels Acceptance Rejection inspection lot in sample number number 2 to 10 a
41、ll 10 11 to 15 16 to 25 26 to 40 “ “ O 1 /“- 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-P-24395 61 m 9999906 0087L139 9 m -1IL-P-24395 (SHIPS) Table II - Sampling for quality conformance inspection (Contd). Number of panels in I Number of
42、panels Acceptance Rejection 1 inspection lot 1 in sample number number 41 to 65 22 1 66 to 110 28 1 O 45 1 35 111 to 180 2 2 181 to 300 2 3 301 to 500 55 2 3 501 and over 4 3 70 i 4.4 Examination. The ground detector panels shall be examined to determine conform- ance with the requirements of this s
43、pecification and the applicable specification sheet which do not require testing and that materials, design, construction, dimensions, marking and workmanship have been met. Alinement of parts shall be observed to determine that the parts are in good working order. 4.5 Tests. 4.5.1 Effectiveness of
44、enclosure. Panels shall be tested to determine the effective- ness of the enclosure in accordance with MIL-STD-108. 4.5.2 Dielectric. Panels shall be subjected for 1 minute to a dielectric test voltage, the effective potential of which is twice rated voltage, plus 500 volts, applied between points o
45、f opposite polarity and between live parts and ground. 4.5.3 Shock. Panels shall be subjected to the high impact shock tests specified for grade A, clanequipment of PIIIL-S-901 to determine conformance with 3.14. There shall be no readjustmant during testing, 4.5.4 Vibration. Panels shall be subject
46、ed to the vibration tests up to and including the frequency range of 15 Hertz for type I equipment as specified in MIL-STD-167 to determine conformance with 3.13. The panels shall perform its principal functions during and after the vibration tests. the dielectric tests shall be measured with a 500
47、volt D.C. megometer between electrical conductors and between electrical conductors and ground at approximately room temperature 75F. (25C.) and at relatiye humidity of approximately 50 percent. 4.5.5 Insulation resistance. Insulation resistance of electrical circuits following 4.5.6 Heat test. The
48、sample(s) shall be subjected to heat testing. The heat testing shall be maddimulated conditions equivalent to normal operating conditions employing maximum rated voltage, maximum rated load and rated frequency. The test shall be conducted continuously until the temperatures have remained constant fo
49、r 1 hour. in method 10nonkon A of MIL-STD-202. The salt solution concentration shall be 20 percent, ing parts and th: :aneTshall be measured to determine conformance with 3.20.1. 4.5.7 Salt S ray. The sample(s) shall be subjected to the salt spray tests specified 4.5.8 Cree a e and clearance. Creepage and clearance distances between current carry- 5. PREPARATION FOR DELIVERY (The preparation for delivery requirements specified herein apply only for direct Gov- ermnent procurements. For the extent of
