1、. MIL-T-574B 66 m 797790b 0223727 7 rn .- MIL-T-594B 17 September 1974 SUPERSEDING MIL-T-594A 19 March 1956 This specification Department of Defense. 1. SCOPE MILITARY SPECIFICATION TEST SETS, ARMATURE AND STATOR is approved for use by all Departments and Agencies of the 1.1 -. This specification co
2、vers the Test Sets (growlers) for locating defective circuits in armatures or stators in rotating electrical machines. c 1.2 Classification. Test Sets shall be of the following types, as specified (see 6.1 and 6.2): c Type A - External Test Set for armatures from 1/2 to 4 inches in diameter. Type B
3、- External Test Set for armatures from 2-1/2 to 6 inches in diameter. Type C - External/internal Test Set for armatures 6 to 12 inches in diameter and Type D - ExternaWnternal Test Set for armatures 2 inches and larger in diameter stators from 2-1/2 to 12 inches in diameter. and stators 6 inches and
4、 larger in diameter. 2. APPLICABLE WCUMENTC 2.1 The following documents of the issue in effect on date of invitation for bids or request for proposal, form a part of the specification to the extent specified herein. SPECIFICATIONS FEDERAL J-C-175 - Cable Assembly, Power, Electrical (3-wire, 3-prong,
5、 Grounding Plug QQ-B-650 - Brazing Alloy, Copper, Copper-Zinc and Copper-Phosphorus. QQ-B-654 - Brazing Alloy, Silver. QQ-S-571 - Solder: Tin Alloy, Lead-Tin Alloy and Lead Alloy. Connector, for 125-Volt Equipment). MILITARY MIL-M-14 - Molding Plastics and Molded Plastic Parts, Thermosetting. MIL-C-
6、915/6 - Cable, Electrical, 600 Volts, Types SHOF, DHOF, THOF and FHOF. MIL-E-917 - Electric Power Equipment, Basic Requirements (Naval Shipboard MIL-C-3432 - Cable and Wire, Electrical (Power and Control, Flexible, and MIL-C-3767/12 - Connector, Plug, Electrical (Power, Three-Wire, Polarized, MIL-P-
7、6906 - Plates, Identification, Aircraft. MIL-M-10304 - Meters, Electrical Indicating, Panel Type, Ruggedized, General MIL-P-15024 - Plates, Tags and Bands for Identification of Equipment. MIL-P-15024/5 - Plates, Identification. MIL-E-17555 - Electronic and Electrical Equipment, Accessories and Repai
8、r Use). Extra Flexible, 300 and 600 Volts). opring-Loaded, Pivoted Grounding Type) Type UP131M. Specification for. Parts, Packing and Packaging of. STANDARDS MILITARY MIL-STD-105 - Sampling Procedures and Tables for Inspection by Attributes. MIL-STD-143 - Standards and Specifications Order of Preced
9、ence for the Selection of. and Repair for Machinery, Piping and Pressure Vessels in Ships of the United States Navy. Percent Defective. MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts. MIL-STD-278 - Fabrication Welding and Inspection: and Casting Inspection MIL-STD-414 - Sam
10、pling Procedures and Tables For Inspection by Variables For MS27603 - Cable Assemblies, Power, Electronic Test Equipment, 10 Amps Max. FSC 6625 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-5948 bb W 79799Ob 03213928 9 m I # # i I I I # MIL-T
11、-594B (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.) the extent-i- Unless otherwise indicated, the issue in effect on d
12、ate of invitation for bids or request for proposal shall apply. 2.2 Other ublications. The following document forms a part of this specification to NATIONAL BURGAU OF STANDARDS Handbook H28 - Screw-Thread Standards For Federal Services. (Application for copies should be addressed to the Superintende
13、nt of Documents, Government Printing Office, Washington, D.C. 20402.) 3. REQUIREMENTS 3.1 Material. The material for each part shall be as specified herein. When a definite material is not specified, a material shall be used which will meet the performance require- ments of this specification. Mater
14、ial selection shall be in accordance with MIL-STD-143. 3.1.1 Prohibited materials. Prohibited materials, as defined in MIL-E-917, shall not be used. 3.1.2 Metal e. material treatedto resist corrosion. Internal metal parts shall be treated for corrosion resistance. The corrosion resistant materials a
15、nd corrosion-resistance treatment shall be in accordance with MIL-E-917. shall not be used. 3.1.3 Plastics. Plastics which serve as electrical insulation shall be in accordance with MIL-E-917. Plastics that do not serve as electrical insulation (structural parts, and so forth) shall meet all physica
16、l and mechanical properties required for plastic insulation materials, including non-flammability and non-toxicity; however, these plastics need not meet the arcing and tracking resistance requirements. shall conform to MIL-M-14. External metal parts shall be of corrosion-resisting materials, or Mal
17、leable iron castings or nodular graphitic iron castings Molding thermosetting plastic material 3.2 General. The Test Sets shall consist essentially of the primary coil and the primary portion of the iron core of a transformer. The magnetic circuit shall be completed by the iron of the armature or st
18、ator being tested. The Test Sets shall be simple in con- struction, reliable in operation, and the parts readily accessible for inspection, adjust- ment or replacement. Iron core. The laminations of the iron core shall be insulated from each other. In the assmofe iron core, care shall be taken to re
19、move all burrs or projecting laminations which might result in injury to the coils or object under test. The laminations shall be clamped together in such a manner as to insure a tight core. of manufacture the assembled core shall be given a varnish dip and baked (see 3.2.9). 3.2.1 During the proces
20、s 3.2.2 Volta e and current. The Test Sets shall be rated 115 volts (V), single phase, 60 Hertz (Hz? aternatingnt - (ac) . 3.2.3 Windin s The windings shall be so supported that mechanical or electro-mechan- ical stressehing from normal operation of the Test Set, including those from short- circuits
21、 in the item under test and shocks in handling, shall not cause weakening of the set, permanent deformation in any of the parts, including the windings, or any other mechan- ical or electrical damage which may affect the operation. 3.2.4 Soldering, brazing weldinq. 3.2.4.1 Solderin The soldering pro
22、cess shall be such as to minimize the spattering Only noncorrosive fluxes shall be used. All of solder and d*surrounding surfaces. soldered connections shall be of such character and quality that the bonding between the soldered items may be determined by visual examination. “cold soldering“. Solder
23、 for electrical connections shall be composition SN60 and SN63 of 9Q-S-571. There shall be no evidence of 3.2.4.2 Brazing. Brazing alloys for electrical connections shall conform to QQ-B-650 or 9Q-B-654. 3.2.4.3 Welding. Welding and allied processes shall be in accordance with MIL-STD-278. 2 Provide
24、d by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-594B bb W 9979906 0123929 O W # I # I # I MIL-T-594B 3.2.4.4 Electrical connections. Electrical connections shall be mechanically secured before being soldered, or brazed, to avoid the possibility of the
25、ir becoming loose when subjected to severe vibration. 3.2.5 Dielectric ywvoltage. The Test Set shall be aapable of withstanding, at 25O + 2 degrees Celsius C lent temperature, an ac potential of 1200 volts root- mean-square (rum) between the frame and the current carrying parts at a nominal frequenc
26、y of 60 Hz for a period of not less than 60 seconds. As a result of this test, there shall be no evidence of arcing, flashover, or punctured insulation. 3.2.6 Insulation resistance. The Test Set shall have insulation resistance not less than 10 megohms when tested at ambient temperatures of 25 3.2.7
27、 Safety. The Test Sets shall be designed and constructed in a way that will ensure safety to operating and maintenance personnel. an electric shock even though an internal fault between any two circuits or between any circuit and Test Set enclosure should develop, Current-carrying parts shall be ade
28、quately insulated to prevent grounding through the frame or any other part of conducting material which may come into contact with the operator. Sharp corners and projections which may cause injury or on which clothing may catch or, which may puncture insulation shall be avoided. input power cable s
29、hall be connected to the Test Set enclosure. grounding conductor shall not exceed 3 volts, and no arcing or burning in the grounding conductor shall be evident when tested as specified in 4.7.4. 2OC. Operating personnel shall not receive 3.2.7.1 Ground connection personnel safety. The grounding cond
30、uctor of the Test Set The potential drop of the 3.2.8 Interchan eability. All parts, subassemblies and assemblies which are removable .shall be interchangezle with corresponding items from a similar Test Set, from stock or, from production without the necessity for re-forming (for example, drillings
31、, bending, filing) or the use of undue force and, without the necessity for individual selection of parts. 3.2.9 Varnish treatment. treatments of clear baking varnish. moisture from the coil by filling of all interstices with varnish and shall be applied by one of the following methods, using the ty
32、pical treatment schedule of MIL-E-917: All coils and windings shall be given a minimum of three The treatment shall be applied to exclude air and (a) Vacuum-pressure (b) Inmersion (c) Centrifugal (d) Pulsating-pressure 3.2.10 Threaded parts. All threaded parts shall be in accordance with Handbook H2
33、8. All threads shall be in conformance with the coarse thread series except that fine thread series may be used only for applications that might show a definite advantage through their use. Where a special diameter-pitch combination is required, the thread shall be of American National form. 3.2.11
34、Locking of screw-thread assemblies. Split-type lockwashers or equivalent means shall be provided under all nuts. 3.2.12 Technical manual. Technical manual shall be prepared as specified (see 6.2.2). 3.2.13 Identification plate (Army and Navy). For Anny and Navy use, an identification plate shall be
35、furnished for each Test Srin accordance with MIL-P-15024. plate for Navy shall also be designed for normal service in accordance with MIL-P-15024/5. The identification 3.2.14 Identification plate (Air Force). For Air Force use, the identification plate shall conform to MIL-P-6906. 3.2.15 Mient tempe
36、rature. The Test Sets shall be designed to operate to meet all requirements specified herein in an ambient temperature range of 0 to SOOC. 3.3 IryEe A. 3.3.1 General. Type A Test Sets shall be used for locating short circuits, open The sets shall be circuits and-s in armatures from 1/2 to 4 inches i
37、n diameter. compact, self-contained, bench type test equipment. 3 1 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-T-594B bb W 9799906 0323730 7 t # t # MIL-T-594B 3.3.2 Switch. A switch shall be provided to permit energizing the Test Set. The s
38、witch ahallbeuuted on the enclosure of the Test Set so as not to interfere with the operation. The switch shall have *on“ and “off“ positions. be furnishedwithach Test Set. 3.3.2). cord and tem?narss-for use in testing for grounds and open circuits. The prods shall be connected to at least 3 feet of
39、 cord outside of the Test Set. The cords shall conform to type SHOF-3 of MIL-C-915/6. Provision shall be made for securely fastening prods and prod cords to the test set when not in use. Each lead shall terminate at one end in a sharp- pointed test prod with an insulated handle. The test prods shall
40、 be completely insulated except for that portion which measures approximately 1/2 inch from the pointed tip. One of the insulated prod handles shall be red and the other black. to the switchd.2). locating short circuits, open cizitf: and ground shall be as follows: 3.3.3 Ammeter. An ammeter, type MR
41、26WOlOACAAR in accordance with MIL-M-10304, shall The ammeter shall be mounted adjacent to the switch (see 3.3.4 Leads and prods. The Test Set shall have attached, two test prods complete with 3.3.5 Indicatin light. An indicating light shall be provided and mounted adjacent 3.3.6 Circuit connections
42、 and o eration. The test set connections and operation for (a) Chart circuit test. The switch shall be turned to the *ON“ position and the test set windingshall be energized to set up magnetic flux linking the Test Set and the armature being tested. (such as a hack-saw blade) approximately l/l-inch
43、above the top slot of the armature and with the armature being slowly rotated by hand, the feeler shall stick and vibrate if the armature coil is short circuited. The switch shall be turned to the “ON“ position and the Test Set winding shall be energized to set up magnetic flux linking the Test Set
44、and the armature being tested. The Test Set ammeter and test prods shall be so connected that as each coil of the armature being tested comes in position between the Test Set pole pieces, the ammeter shall have indica- tion when the corresponding commutator bar is touched by one test prod and the ad
45、jacent bar is touched by the other test prod. No reading on the ammeter shall indicate open winding. light will be energized to indicate a grounded coil or grounded commutator bar of the armature being tested when one test prod is placed on the armature shaft and the other test prod is placed on any
46、 commutator bar of the armature. By placing a thin ferrous-metal feeler (b) Open circuit test. (c) Ground test. The switch shall be turned to the “ON“ position. The Test Set uindingd indicating light shall be so connected so that the indicating 3.3.7 3.3.7.1 Air Force. The cable shall be in accordan
47、ce with MS27603-1 of MS27603. 3.3.7.2 N4 Shi board. grounding provisionsdk?rdance with J-C-175, except that the length of cable shall be 0 feet. provided to form a bench type tester. switch, indicating light and the core. the enclosure. Input power cable and plup. The Test Set shall be provided with
48、 a cable assembly and 3.3.8 Enclosure. A metal enclosure, protected against corrosion (see 3.1.21, shall be On this enclosure shall be mounted the ammeter, Windings and mechanisms shall be mounted within 3.3.9 Limiting dimensions. The overall dimensions shall not exceed the following: Width - 6 inch
49、es. Length - 10 inches. Height - 6 inches. test cord shakexceed 13 pounds. 3.3.10 Wei ht The maximum weight including input power cable, plug, test prods and 3.4 Type 8. 3.4.1 General. Type B Test Sets shall be constructed to withstand severe jolting when transported by military trucks, and shall be used for locating short circuits, open circuits, and grounds in engine starting motor armatures and in battery charging generator armatures, from 2-1/2 to 6 inches in diameter. 4 Provided by IHSNot for ResaleNo reproduction or netw
