1、 AMSC N/A FSC 5925 INCH-POUND MIL-PRF-39019F 14 May 2010 SUPERSEDING MIL-PRF-39019E 08 February 2008 PERFORMANCE SPECIFICATION CIRCUIT BREAKERS, MAGNETIC, LOW-POWER SEALED, TRIP-FREE GENERAL SPECIFICATION FOR This specification is approved for use by all Departments and Agencies of the Department of
2、 Defense. 1. SCOPE 1.1 Scope. This specification covers the requirements and test procedures for single and multipole, trip-free, sealed, low-power, magnetic circuit breakers with current ratings of 0.050 amperes to 20.0 amperes inclusive, up to and including 240 volts, 60 hertz (Hz) and 400 Hz alte
3、rnating current (ac), and 50 volts direct current (dc) (see 6.1 and 6.7). These circuit breakers may also include auxiliary contacts (see 6.6.1) and terminals for monitoring circuits. Designers are CAUTIONED that these circuit breakers may contain a pure tin finish on some of the component parts (se
4、e 6.5). 1.2 Part or Identifying Number (PIN). The PIN will consist of the letter “M”, the basic number of the specification sheet, and an assigned dash number (see 3.1), as shown in the following example: M 39019/XX -XXX Designator Specification Dash number sheet number (see 3.1 for details) 2. APPL
5、ICABLE 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 for additional information or as examples. While every effort has been ma
6、de 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 Government documents. 2.2.1 Specifications, standards, and handbooks. The follow
7、ing 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 (see 6.2). FEDERAL SPECIFICATIONS TT-I-735 - Isopropyl Alcohol. FEDERAL STANDARDS FED-ST
8、D-H28 - Screw-Thread Standards for Federal Services. Comments, suggestions, or questions on this document should be addressed to: US Army Communications-Electronics RDEC, ATTN: RDER-PRT, Fort Monmouth, NJ 07703-5023 or emailed to Robert.Francisus.army.mil. Since contact information can change, you m
9、ay want to verify the currency of this address information using the ASSIST Online database at https:/assist.daps.dla.mil.Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-3
10、9019F 2 DEPARTMENT OF DEFENSE SPECIFICATIONS (See supplement 1 for list of specification sheets.) DEPARTMENT OF DEFENSE STANDARDS MIL-STD-202 - Test Methods for Electronic and Electrical Component Parts MIL-STD-1285 - Marking of Electrical and Electronic Parts. (Copies of these documents are availab
11、le online at https:/assist.daps.dla.mil/quicksearch/ or https:/assist.daps.dla.mil/ or from the Standardization Document Order Desk, 700 Robbins Avenue, Building 4D, Philadelphia, PA 19111-5094). 2.3 Non-Government publications. The following documents form a part of this document to the extent spec
12、ified herein. Unless otherwise specified, the issues of these documents are those cited in the solicitation or contract (see 6.2). AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) NCSL-Z540.3 - Calibration Laboratories and Measuring and Test Equipment - General Requirements. INTERNATIONAL ORGANIZATION F
13、OR STANDARDS (ISO) ISO 10012 - Measurement management systems - Requirements for measurement processes and measuring equipment. (A Copy of this document is available from http:/www.ansi.org/ or the American National Standards Institute (ANSI), 11 West 42nd Street, New York, NY 10036-8002). INSTITUTE
14、 OF ELECTRICAL AND ELECTRONIC ENGINEERS, INC. (IEEE) IEEE STD 315-1975 - Graphic Symbols for Electrical and Electronic Diagrams. (A Copy of this document is available from http:/www.ieee.org or from the Institute of Electrical and Electronic Engineers (IEEE), IEEE Operations Center, 445 Hoes Lane, P
15、. O. Box 1331, Piscataway, NJ 08855-1331, Phone: +1 732 981 0060, Fax: +1 732 981 1721.) 2.4 Order of precedence. Unless otherwise noted herein or in the contract, in the event of a conflict between the text of this document and the references cited herein (except for related specification sheets) t
16、he text of this document takes precedence. Nothing in this document, however, supersedes applicable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 Specification sheets. The individual item requirements shall be as specified herein and in accordance with the a
17、pplicable specification sheet. In the event of any conflict between the requirements of this specification and the specification sheet, the latter shall govern. 3.2 Qualification. Circuit breakers furnished under this specification shall be products that are authorized by the qualifying activity for
18、 listing on the applicable qualified products list before contract award (see 4.5 and 6.3). 3.3 Material. Material shall be used which will enable the circuit breakers to conform to the performance requirements of this specification. Acceptance or approval of any constituent material shall not be co
19、nstrued as a guaranty of the acceptance of the finished product. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39019F 3 3.3.1 Metals. Metals shall be of a corrosion-resi
20、stant type or shall be suitably plated or treated to resist corrosion (see 3.21). Cadmium and zinc plating shall not be used. 3.3.1.1 Dissimilar metals. When dissimilar metals are used in intimate contact with each other, protection against electrolysis and corrosion shall be provided. The use of di
21、ssimilar metals in contact, which tend toward active electrolytic corrosion (particularly brass, copper, or steel used in contact with aluminum or aluminum alloy), is not acceptable. However, metal plating or metal spraying of dissimilar base metals to provide similar or suitable abutting surfaces i
22、s permitted. The use of dissimilar metals separated by a suitable insulating material is also permitted. Dissimilar metals are defined in 6.4. 3.3.2 Fungus resistance. Materials used shall be non-nutrient to fungus growth. 3.3.3 Solder and soldering flux. The solder and solder flux shall be of such
23、a quality as to enable the circuit breaker to meet the performance requirements of this specification. 3.4 Interface and physical dimensions. Circuit breakers shall be of the interface and physical dimensions specified (see 3.1). 3.4.1 Trip-free feature. Circuit breakers shall be so designed that th
24、e circuit cannot be maintained closed by physically holding the lever in the closed position when any pole is carrying overload currents which would normally automatically trip the breaker to the open position. 3.4.2 Trip indication. Circuit breakers shall be so designed that when the circuit breake
25、r contacts open automatically on overload, the actuating lever shall indicate the operation by moving to the “off“ (“trip“) position. 3.4.3 Attitude. Circuit breakers shall be constructed to trip within maximum and minimum limits of the specified trip times (see 3.9 and 3.13) when mounted on a verti
26、cal panel (normal mounting means) (see 4.8.6). 3.4.4 Actuating lever. The exposed portion of the actuating lever shall have a smooth, nonglare, metallic finish and shall be insulated from all current-carrying parts. Multipole circuit breakers (see 6.6.3) shall be configured so that it will be imposs
27、ible by any manipulation of the actuating lever to close less than the total number of contacts. The actuating lever shall point in the direction of the mounting bushing keyway when the circuit breaker is in the “closed “ (“on“) position. The actuator shall not work to an intermediate position, give
28、 a false trip indication, or be removable from the circuit breaker. 3.4.5 Panel seal. The panel seal shall effectively seal the circuit breaker to the mounting panel. 3.4.6 Mounting hardware. Mounting hardware shall be as specified (see 3.1). Circuit breakers shall be furnished with a nonturn device
29、. Each circuit breaker shall be furnished with a tab or plate which fits over the mounting bushing and into the keyway slot. The tab or plate shall be marked with “on” on the side where the keyway slot is located and “off” on the side opposite the keyway slot. For direct Government procurement, the
30、hardware shall be assembled in proper order as specified (see 3.1). 3.4.7 Threaded parts. Screw threads on removable threaded parts shall be in accordance with FED-STD-H28. Threading of nonmetallic parts shall not be permitted. Copyright Communications - Electronics Command Provided by IHS under lic
31、ense with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-39019F 4 3.4.8 Terminals. 3.4.8.1 Line and load terminals. The main line and load terminals shall be mounted as specified (see 3.1). Load terminals will be on the side of the keyway and line term
32、inals will be on the side opposite of the keyway. Each terminal shall be capable of carrying rated current and voltage per pole of the circuit breaker. The terminals shall be hook style for configuration 1 and screw terminals for configuration 2. 3.4.8.2 Auxiliary contact terminals. When specified (
33、see 3.1), circuit breakers shall be provided with auxiliary contacts (see 6.6.1) of the single-pole, double-throw type and three auxiliary contact terminals, which, unless otherwise specified (see 3.1), shall be capable of carrying 0.5 ampere tungsten lamp load at 50 volts dc or 120 volts ac. There
34、shall be one common terminal (designated by symbol “C“), one terminal to indicate auxiliary contacts which are normally open (designated by symbol “NO“) when the main circuit breaker contacts are open, and one terminal to indicate auxiliary contacts which are normally closed (designated by symbol “N
35、C“) when the main circuit breaker contacts are open, regardless of lever position. Terminal location, style, and design shall be as specified (see 3.1). 3.4.8.3 Solderability of hook terminals. Hook terminals shall be treated to facilitate soldering. Coating such as hot solder dip is acceptable. 3.4
36、.9 Reset mechanism. The reset mechanism shall be so designed that retaining the actuator in the closed position after automatic tripping occurs shall not adversely affect subsequent performance of the circuit breaker. 3.4.10 Tamper-proof calibration. Circuit breakers shall be so sealed that tamperin
37、g with the calibration is not possible without dismantling the device or breaking the seal. 3.4.11 Soldering. When soldering is employed, only noncorrosive fluxes shall be used. Solder shall not be used primarily for obtaining mechanical strength. Electrical connections shall be mechanically secure
38、before, and electrically continuous after, soldering. 3.4.12 Welding and brazing. When welding or brazing is employed, the electrical connections shall be mechanically secure and electrically continuous after welding or brazing. When brazing is employed, only noncorrosive fluxes shall be used. 3.4.1
39、3 Voltage and frequency rating. Circuit breakers shall be designed to have identical load ratings at all voltages up to and including 50 V dc and 240 V ac, 60 Hz and 400 Hz (see 3.1 and 6.7). 3.4.14 Continuous current carrying capacity. Circuit breakers shall be capable of continuously carrying the
40、rated current as specified (see 3.1). 3.4.15 Circuit diagram. The circuit diagram shall be as specified (see 3.1). 3.5 Solderability. When circuit breakers are tested as specified in 4.8.2, 95 percent of the total length of fillet, which is between the standard wrap wire and the terminal, shall be t
41、angent to the surface of the terminal being tested. There shall be no pinholes, voids, etc. A ragged or interrupted line at the point of tangency between the fillet and the terminal under test shall be considered a defect. After the test there shall be no evidence of fracture, loosening of parts, or
42、 any other mechanical failure of the circuit breakers. 3.6 Dielectric withstanding voltage. When circuit breakers are tested as specified in 4.8.3, the leakage current shall not exceed 0.5 milliampere and there shall be no evidence of flashover, mechanical damage, arcing, or breakdown. 3.7 Insulatio
43、n resistance. When circuit breakers are tested as specified in 4.8.4, the insulation resistance shall not be less than 100 megohms. Copyright Communications - Electronics Command Provided by IHS under license with CRAINot for ResaleNo reproduction or networking permitted without license from IHS-,-,
44、-MIL-PRF-39019F 5 3.8 Resistance or impedance. Circuit breakers shall be tested as follows: a. Main contacts: When circuit breakers are tested as specified in 4.8.5a, the resistance or impedance of the main contacts shall not exceed the maximum values specified (see 3.1). b. Auxiliary contacts: When
45、 circuit breakers are tested as specified in 4.8.5b, the initial contact resistance shall not exceed 0.1 ohm. 3.9 Calibration. When circuit breakers are tested as specified in 4.8.6, the tripping times (see 6.6.6) shall not exceed the limits shown in table I for the applicable time delay specified (
46、see 3.1 and 6.6.5). In multipole circuit breakers, all poles shall trip upon application of overload on any pole or combination of poles. When tested for high inrush, circuit breakers shall not trip. 3.10 Actuating lever (see 4.8.7). 3.10.1 Lever strength. When circuit breakers are tested as specifi
47、ed in 4.8.7.1, there shall be no evidence of mechanical damage. 3.10.2 Lever operating force. When circuit breakers are tested as specified in 4.8.7.2, the applied force necessary to operate the lever in either direction shall not exceed the following: One-pole breaker - 4 pounds. Two-pole breaker -
48、 7 pounds. Three-pole breaker - 10 pounds. 3.11 Seal. When circuit breakers are tested as specified in 4.8.8, there shall be no visible air bubbles indicative of leakage. 3.12 Panel seal. When circuit breakers are tested as specified in 4.8.9, there shall be no visible air bubbles indicative of leak
49、age. TABLE I. Calibration tripping times (seconds) at 25C 2C. Percent of rated current Time delay A (fast) Time delay B (slow) Time delay C (nondelay) Min Max Min Max Min Max 100 135 200 400 600 800 800 at 60 Hz and dc 3/ 1400 at 400 Hz 3/ No trip 1 hour 0.2 0.055 Inst 1/ Inst Inst No trip No trip No trip 1 hour 7.0 0.95 0.24 0.13 0.06 No trip No trip No trip 1 hour 3.0 0.5 Inst Inst
