1、 MIL-M-24577A 66 7797706 0332733 T MIL-M-24 5 7 9A( SH) 17 August 1988 SUPERSEDING D OD -M- 2 4 5 7 9 ( SK ) 20 October 1978 (See 6.8) MILITARY SPECIFICATION NEASURING SYSTEM, SUBMARINE STORAGE BATTERY CURRENT (METRIC) This specification is approved for use within the Naval Sea Systems Command, Depa
2、rtment of the Navy, and is available for use by all Departments aiid Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers a current measuring system used to measure and display the instant value and time integral of direct current (dc) in a submarine storage battery c
3、ircuit. 2. APPLICABLE DOCUMENTS 2.1 Government documents. 2.1.1 Specifications and standards. The following specifications and standards form a part of this specification to the extent specified herein. Unless otherwise specified, the issues of these docuemnts shall be those listed in the issue of t
4、he Department of Defense Index of Specifications and Standards (DoDISS) and supplement thereto, cited in the solicitation. SPECIFICATIONS FEDERAL PPP-F-320 - Fiberboard: Corrugated and Solid, Sheet Stock (Container Grade), and Cut Shapes. MIL IT ARY MIL-M-14 - Molding Plastics and Molded Plastic Par
5、ts, MIL-S-901 - Shock Tests, H.I. (High Impact); Shipboard Thermosetting. Machinery, Equipment and Systems, Requirements for. i Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this document should be addressed to: Commander, Naval S
6、ea Systems Command, SEA 5523, Department: of the Navy, Washington, DC 20362-5101 by using the s.elf-addressed Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of this document or by letter. AMSC NIA DISTRIBUTION STATEMENT A I . FSC 6625 Approved fok public release; d
7、istribution unlimited i THIS DOCUMENT CONTAINS 25 PAGES. Licensed by Information Handling ServicesNIL-PI-245 7 9A( SH) blIL1TARY (Continued) MIL-E-9 17 - Electric Power Equipment, Basic Requirements FIIL-E-203 6 MIL-P-15024 - Plates, Tags and Bands for Identification of EtIL-P-15024/5 - Plates, Iden
8、tification. MIL-11-16034 Portable Types). MIL-M-16034/2 - Ammeters, D.C. Switchboard, 4-1/2 Inch, 250-Degree Scale. MIL-E-17555 - Electronic and Electrical Equipment, Accessories, and Provisioned Items (Repair Parts): Packaging of. (Naval Shipboard Use). (Naval Shipboard). Equipment. - Enclosures or
9、 Electric and Electronic Equipment - Meters, Electrical - Indicating (Switchboard and ML-L-19140 MIL-C-24643 - Cable and Cord Electrical, LowSmoke, for Ship- MIL-C-24643/33 - Cable, Electrical, Type LS2SWU (Including - Lumber and Plywood, Fire-Retardant Treated. board Use, General Specification for.
10、 Variation LS2SiWA) . STANDARD S MILITARY MIL-STD- 1 6 7 - 1 MIL- STD- 2 O 2 MIL-STD-470 MIL-STD-1364 MIL-STD-1399, Section 300 DOD-STD-1399, Section 304 - Elechanical Vibrations of Shipboard Equipment (Type I - Environmental and Type II - Internally Excited). Component Parts. Equipmen t. Equipment.
11、 Electric Power Alternating Current. (Hetric) Electrical Cables and Connectors. (Metric) - Test llethods for Electronic and Electrical - Maintainability Program for Systems and - Standard General Purpose Electronic Test - Interface Standard for Shipboard Systems - Interface Standard for Shipboard Sy
12、stems 2.1.2 Other Government publications. The following other Covernnent rmblication forms a part of this specification to the extent specified herein. Unless otherwise specified, the issues shall be those in effect on the date of the solicitation. PUBLICATION NAVAL SEA SYSTEMS COlIMAND (NAVSEA) NA
13、VSHIPS 0967-3 12-8010 - Maintainability Design Criteria Handbook for Designers (Formerly NAVSIIIPS 94324) of Shipboard Electronic Equipment. (Copies of specificatons, standards, and publications required by contrac- tors in connection with specific acquisition functions should be obtained from the c
14、ontracting activity or as directed by the contracting activity.) 2 Licensed by Information Handling ServicesMIL-M-2q577A bb m 7977706 0332733 3 - MIL-M-24579A( SH) 2.2 Other publication. The following document forms a part of this speci- fication to the extent specified herein. Unless otherwise spec
15、ified, the issues of the documents which are DoD adopted shall be those listed in the issue of the DoDISS specified in the solicitation. Unless otherwise specified, the issues of documents not listed in the DoDISS shall be the issue of the nongovernment docu- ments which is current on the date of th
16、e solicitation. AMERICAN NATIONAL STANDARDS INSTITUTE (ANSI) Y32.16 - IEEE Standard Reference Designations for Electrical and Electronics Parts and Equipments. (DoD adopted) (Application for copies should be addressed to the American National Standards Institute, 1430 Broadway, New York, NY 10018.)
17、(Nongovernment standards and other publications are normally available from the organizations which prepare or which distribute the documents. These documents also may be available in or through libraries or other informational services.) 2.3 Order of precedence. In the event of a conflict between t
18、he text of this specification and the references cited herein (except for associated detail specifications, specification sheets or MS standards), the text of this specifi- cation shall take precedence. Nothing in this specification, however, shall supersede applicable laws and regulations unless a
19、specific exemption has been obtained . 3. REQUIREMENTS 3.1 First article. When specified in the contract or purchase order, a sample shall be subjected to first article inspection (see 4.3 and 6.3). 3.2 System assemblies. The current measuring system shall consist of the following assemblies : (a) D
20、c transducer. The transducer shall contain one or more iron cores, wound coils and Hall effect semiconductor devices as required to yield operation specified herein. The transducer shall provide electrical isolation between the storage battery dc busbar (rigid busbars or cables) and all circuits in
21、the transducer. The function of the transducer is to sense magnitude and direction of dc flowing in the busbar and to send appropriate signals to the control unit. rotating parts such as transistors, other semiconductor devices, transformers, resistors, capacitors, and so forth as required to perfor
22、m the required function. The function of the control unit is to process the signal derived from the transducer and to ap- propiately energize the display devices specified hereinafter. (b) Control unit. The control unit shall utilize solid-state non- 3 Licensed by Information Handling Services(1) Am
23、meters. The measuring system shall operate w-Lhin the requirements of this specification with three ammeters that will be remotely located on a switchboard. Unless other- wise specified (see 6.2.1), the ammeters are not required to be furnished as a part of the measuring system. ammeters shall be as
24、 follows: The a. Low-range. The low-range current ammeter shall be a dc ammeter of 20-0-20 ampere range conforming to MIL-M- 1603 4 and MIL-M- 1603 4 / 2. ammeter conforming to MIL-11-16034 and MIL-M-16034/ in the following ranges: b. Mid-range. The mid-range dc ammeter shall be a dc 500-0-500 amper
25、e range. 800-0-800 ampere range. C. High-range. The high-range dc ammeter shall be a dc ammeter conforming to MIL-Pi-16034 and MIL-M-16034/2, except the ranges shall be as follows: 4000-0-3000 ampere range. 8000-0-6000 ampere range. (2) Ampere-hour indicator. The ampere-hour indicator shall have two
26、 digital counters, one mounted in the control unit and the other remotely mounted near the ammeters on a switchboard. The remote indicator shall be en- closed in a meter case conforming to the basic material and dimensional requirements of MIL-M-16034 and MIL-M-16034/2. control unit shall have a ran
27、ge of O to 9,999,999 ampere hours, and the remote digital counter shall have a range of O to 999,999 (see 3.4.3). The digital counter mounted in the 3*3 Connecting cable. The connections between the dc transducer, the control unit, and all dc meters and the ampere-hour indicators shall be made by sh
28、ielded cables having a maximum resistance of 2.3 ohms per conductor per 100 meters at 25 degrees Celsius (OC) (see MIL-C-24643 and type LS2SW of MIL-C-24643/33). Unless otherwise specified (see 6.2.1), cables shall not be furnished. llaximum cable lengths will be as follows: (a) (b) Between the dc t
29、ransducer and the control unit - 80 meters. Between the control unit and all dc meterc and the remote ampere-hour indicator: 500-500 ampere mid-range and 4000-0-3000 ampere high range: 80 meters. 800-800 ampere mid-range and 8000-0-6000 ampere high ,) range: 160 meters, ? 3.3.1 Electrical connectors
30、. Electrical connectors shall conform to section 304 of DOD-STD-1399, O U a e 4 Licensed by Information Handling ServicesMIL-M-24577A bb m 77777Ob 0332735 7 m MIL-M-24579A(SH) 3.4 Construction of assemblies. 3.4.1 Transducer. The transducer shall conform to the requirements of MIL-E-917 and shall be
31、 constructed for bulkhead mounting. The envelope and mounting dimensions shall be as shown on figure 1. The transducer shall have a dripproof protected (45-degree) enclosure conforming to class 1 of MIL-E-2036. The transducer shall be installed by sliding the transducer over the end of the busbar. I
32、f the transducer contains one or more Hall effect semiconductor devices, replacement of these devices shall not require removal of the transducer from the busbar. The mass of the transducer shall not exceed 12 kilograms (kg). t 3.4.2 Control unit. The control unit shall conform to the requirement of
33、 MIL-E-917 and shall be constructed for bulkhead mounting. Mounting and envelope dimensions shall be as shown on figure 2. The control unit shall have a drip- proof protected (45-degree) enclosure conforming to class 1 of MIL-E-2036. The mass of the control unit shall not exceed 14 kg. .1 3.4.3 Ampe
34、re-hour indicator. The ampere-hour indicator shall be a non- mercury type having two digital counters. digits for the local readout and six digits for the renote. be operated from the control unit to indicate the time integral of the battery dc in one direction only; one counter to register the char
35、ging current anpere hours and the other to register the discharging current ampere-hours. counter digits shall be not smaller than 3.5 millimeters (mm) high and 3 mm wide and shall be white on black background. The indicators shall be flush mounting. material. The metal shall be of corrosion-resista
36、nt material or material treated for corrosion resistance in accordance with MIL-E-917. The plastic material shall be in accordance with MIL-M-14 of a type specified in MIL-E-917. The dimensions of the indicators and mounting bezel shall be as shown on figure 3. A hand operable reset device shall be
37、provided for each digital counter. The reset devices shall be mounted on the back for the counter mounted in the control unit and in the front for the counter remotely mounted. One counter shall have a legend plate designated “charge“ and the other counter shall have a legend plate designated “disch
38、arge“. Each counter shall display seven Each counter shall The The bezel of the indicators shall be constructed of metal or plastic 3.5 System connections and isolation. Positive indication or marking shall be movided on the transducer to identify the direction of charge current flow. for external c
39、onnections. electrically and physically, from the battery busbars. insulation resistance and dielectric withstanding voltage shall be as shown in table I. There shall be no evidence of arcing, corona (visible, audible, or odorous) flashover, or punctured insulation following the dielectric withstand
40、ing voltage test. The system assemblies shall be provided with terminal blocks or connectors The system shall be completely isolated, both Mininum values of 5 Licensed by Information Handling ServicesIlIL-M-24573A( SM) TABLE I. Insulation resistance and dielectric withsta - Point of measurement Mini
41、mum . insulation Assembly Between And resistance (Megohms ) - Busbar Transducer terminals 10 Each electrically All other circuits isolated circuit and ground 10 Terminals Ground 20 Te mina1 s Exposed metallic Transducer Indicator surf aces 20 Control Each electrically All other circuits unit isolate
42、d circuit and ground 10 Iding voltage. 1.11 nimm di e lec t r i c withstanding voltage (alternating current) (Volts) 3600 1200 2600 2600 1200 3.6 System performance. 3.6.1 Accuracy. Accuracy of indication shall be as specified in table II, in terms of percent of the u11 scale value of the ammeters b
43、eing energized for the dc indicators and in terms of percent of maximum busbar current for the low-range, mid-range, or high-range, times the time interval in hours or the ampere-hour indicator. For example, if the full scale value of the ammeter is 40 amperes (20-0-20 meters), the low-range current
44、 accuracy is plus or minus 1 percent of 40 (2 x 20 amperes) or plus or minus 0.4 amperes for any current: not greater than 20 amperes. A similar example for ampere-hours involving 2 hours operation in the low current range where the accuracy is plus or minus 1.5 percent, is plus or minus 1.5 percent
45、 of 40 (2 hours x 20 amperes) or plus or minus 0.6 ampere-hour. as speci.fj.ed In 3,6.1.1. These accuracies shall apply at reference conditions TABLE 11. Accuracies in percentage. I I i I Busbar current ampere Indicator charge or discharge 1 to 20 20 to 8000 - +1.0 Low-range current L Mid-range curr
46、ent - ammeter ammeter ammeter cator +2 +2 +2.5 - - - IIigh-range current - +1.5 Ampere-hour indi- - 1 6 Licensed by Information Handling Services- MIL-M-24579A 66 9999906 0132937 0 Variable 3.6.1.1 Reference conditions. Accuracy requirements as shown in table II shall apply under the reference condi
47、tions shown in table III. Condition TABLE III. Reference conditions. Tempe rat Ure Relative humidity Applied frequency Applied voltage Operating position Warm-up time 27.5 + 2OC 30 to-60 percent 60 + 1 hertz 115-+ 1 volts On verticai panel Reading time 3.6.2 Input power (control unit). Circuits of t
48、he control unit will be The indi- connected to and shall operate from a 60 hertz, single phase source of 115 volts type I power in accordance with section 300 of MIL-STD-1399. cations given by the meters and the indicators shall not be affected to an extent greater than that specified in 3.9 by the
49、steady-state variations in input voltage and frequency of the magnitude given by section 300 of EIIL-STD-1399. excursions from 103.5 to 126.5 volts. The power required from the 60 hertz source to operate the system shall be not more than 100 watts under all operating conditions specified herein. System calibration shall not be permanently affected by voltage 3.6.3 Busbar current. When busbar current exceeding the end-scale value of the ammeters (see 3.2(b)(l) flows, the control unit circuits shall provide limit- ing of the energy applied to these ammeters so that while the
