1、MIL-PRF-L17b?G 999970b 2057453 034 IINCH-POUND I MIL-PRF- 1 1767G(AT) 12 December 1997 SUPERSEDING 4 June 1991 MlL-R-l1767F(AT) PERFORMANCE SPECIFICATION RELAY ASSEMBLY: GUN-FIRING, WATERPROOF, 24 VOLT DC This specification is approved for use by the U.S. Army Tank-automotive and haments Command, De
2、partment of the Army, and is available for use by all Departments and Agencies of the Department of Defense. 1. SCOPE 1.1 Scope. This specification covers one type of waterproof gun-firing relay assembly with a nominal rating of 24 volts circuits of military combat vehicles. The assembly consists of
3、 relays which control the firing of the main gun by the operation of a time delay circuit and a separate fast-operating, fast-release relay which controls the firing of the machine gun (see 6.1). direct current (dc) for use in the main gun and machine gun 2. APPLICABLE DOCUMENTS 2.1 General. The doc
4、uments listed in this section are specified in sections 3 and 4 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 made to ensure the completeness of this l
5、ist, document users are cautioned that they must meet aii specified requirement documents cited in sections 3 and 4 of this specification, whether or not they are listed. IBeneficiai comments (recommendations, additions, deletions) and any pertinent data which may be of use in improving this documen
6、t should be addressed to: U.S. Army Tank-automotive and Armaments Command, ATTN: AMSTA-TR-EBLUE, Warreq MI 48397-5000, by using the Standardization Document Improvement Proposai (DD Form 1426) appearing at the end of this document, or by letter. AMSC N/A FSC 5945 DISTRIBUTION STATEMENT A Approved fo
7、r public release; distribution is unlimited. Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-LL767G m O6 2057454 T70 m MILPW- 1 1767G(AT) 2.2 Government documents. 2.2.1 other Government documents. drawings. and publications. The following ot
8、her Government documents, drawings, and publications form a part of this document to the extent specied herein. Unless otherwise specified, the issues are those cited in the solicitation. DRAWING 8338636 - Relay Assembly, Gun Firing (Interface). (Copies of this drawing are available from the U.S. Ar
9、my Tank-automotive and Armaments Command, AT“: AMSTA-TR-E/BLUE, Warren, MI 48397-5000.) 2.3 Order of mecedence. In the event of a conflict between the text of this document and the references cited herein, the text of this document takes precedence. Nothing in this document, however, supersedes appl
10、icable laws and regulations unless a specific exemption has been obtained. 3. REQUIREMENTS 3.1 First article. When specified (see 6.2), a sample shall be subjected to first article inspection in accordance with 4.3. 3.2 Desien materials. and manufiu%ring process. Unless otherwise specified (see 6.2)
11、, the design, materials, and manufhcturing process selection is the prerogative of the contractor as long as ali articles submited to the government fully meet the interface and interoperability, environmental, support and ownership, and operating requirements specified herein. 3.2.1 Recycled. recov
12、erd or environmentallv preferable materials. Recycled, recovered, or environmentally preferable materials should be used to the maximum extent possible provided that the materia meets or exceeds the operational and maintenance requirements, and promotes economically advantageous life cycle costs. 3.
13、3 Interface and interoperabiity requirements. The relay assembly shall conform to the envelope dimensions, and the electrical and mounting interfaces as shown in Drawing 8338636. 3.3.1 Grounding. The nish around the mounting holes shaU provide positive electrical contact to ground when the assembly
14、is normally mounted. This requirement does not apply to relay assemblies mounted on insulated bases. 2 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-11767G 9999906 2057455 907 MIL-PRF- 1 1767G(AT) 3.3.2 Wei9;ht. The maximum weight of the re
15、lay assembly shall be four pounds (lb). 3.3.3 Mounting bracket. When brackets are used, they shall be an integral part of the housing or shall be securely attached thereto, in a manner to prevent any movement between assembly and the mounting bracket in service. 3.3.4 Polarity. The relay assembly sh
16、all operate in a circuit having the negative battery terminal grounded. 3.4 Environmental requirements. The design, materials, and construction of relay assembly shal enable the unit to operate in the following environmental conditions The relay assembly shall subsequently meet the requirements spec
17、ified in 3.6.1, 3.6.4, 3.6.5, 3.6.7, and 3.6.8. 3.4.1 Vibration. The relay assembly shall evidence no mechanical or electrical malfnction (opening or closing of relay contacts). 3.4.2 Shock. The relay assembly shall evidence no mechanical or electrical malfunction (opening or closing of relay contac
18、ts). 3.4.3 Corrosion. Metals shall be of a corrosion-resistant type or shall be treated to resist corrosion. The relay shali evidence no corrosion. 3.4.4 Waterproofness. The relay assembly shall be waterproof 3.5 Suoprt and ownership requirements. 3.5.1 Materials. The relay assembly shall not produc
19、e any hazards to personnel or the environment resulting from the use of asbestos or cadmium. 3.5.1.1. Dissimilar metals. Except where necessary to complete an electrical circuit, there shall be no contact between dissimilar metals, which would encourage galvanic action. 3.5.2 Springs. Springs shall
20、not be used to transmit current. 3.5.3 Endurance. The relay assembly shall remain mechanically and electrically operative and the voltage drop across the main gun and machine gun relay contacts carrying rated current, shall not exceed the limits specified in 3.6.7. The relay assembly shal subsequent
21、ly meet the requirements of 3.6.1 and 3.6.4 through 3.6.7. 3 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-LL7b7G 99Ob 205745b 843 MIL-PRF- 1 1767G(AT) 3.5.4 Color. Exterior sudiices of the relay assembly housing shall be white. 3.5.5 Ident
22、ification marking. Identification marking shall be permanent and legible and, as a minimum, shall include the following: a. ?Relay assembly: gun-firing? b. ?24 Vdc waterproof? c. Military Part Number (Pl?) (see 6.2) d. Manufacturer?s name e. Manufacturer?s serial number (if applicable) f. Date of ma
23、nufixture (month, year) 3.6 ODerating reauirements. 3.6.1 Time delav. The relay shall provide a time delay (time the main gun-firing relay contacts are closed) between O. 10 and 0.50 seconds throughout the operating voltage range of 18 to 30 Vdc. The relay assembly shall subsequently meet the requir
24、ements specified in 3.5.3 and 3.6.2 through 3.6.8. 3.6.2 Operating current. When the main gun relay is energized, the operating current shall not be more than 0.35 amperes (A). 3.6.3 Dielectric strength. The relay assembly shall evidence no loosening, cracking, burning, smoking, rupturing or any oth
25、er damage to the insulation. It shall subsequently meet the requirements of 3.6.1, 3.6.4, 3.6.5, and 3.6.7. 3.6.4 Pick-up voltme. The pick-up voltage of the machine gun relay shall not exceed 18 Vdc when tested for ten cycles (deenergize and energize). 3.6.5 Drop-out voltwe. The drop-out voltage of
26、the machine gun relay shall be between 1.5 and 8 Vdc. 3.6.6 Coil current. The coil current of the machine gun relay shall be not more than 0.35 k 3.6.7 Contact voltaae drop. Unless otherwise specified (see 6.2), the voltage drop across external tenninals of the main gun and machine gun relay assembl
27、ies, shall not exceed individual reading of 175 millivolts (mv) or an average of 150 mV before cycling and individual reading of not more than 200 mV or an average of 175 mV after cycling tests. 3.6.8 Extreme temperature operation. Extreme temperatures shall not be detrimentai to the performance of
28、the relay assembly. The relay assembly shail meet the requirements of 3.6.1 at extreme temperatures. 4 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-LL7bG 9999906 2057457 8T Titie Requirement Verification Interface 3.3 4.7 Groundine 3.3.1
29、4.7 MIL-PRF- 1 1767G(AT) Title Requirement Verification Endurance 3.5.2 4.9.1 Color 3.5.3 4.9 4. VERIFICATION 4.1 Classification of inspections. The inspection requirements specified herein are classified as follows: a. First article inspection (see 4.3). b. Conformance inspections (see 4.4). c. Con
30、trol tests (see 4.5). 4.2 Insoection conditions. Unless otherwise specified (see 6.2), all inspections shall be conducted under the following conditions: a. Air temperature: 77 15 degrees Fahrenheit (“F). b. Barometric pressure: 28.5 (+ 2, - 3) inches of mercury c. Relative humidity: 50 30 percent (
31、%). 4.3 First article inspection. Unless otherwise specified (see 6.2), five relay assemblies shaii be utilized for first article testing (see table I). The relay assemblies shd be representative of the units proposed to be funiished under the contract. First article inspection shall be done in the
32、order specified in table II. springs 13.5.1 I 4.9 I Extremetemperature I 3.6.8 14.10.8 4.4 Conformance inspections. Conformance inspection shall include the applicable tests of table I, as specified in the contract (see 6.2). 4.5 Control tests. When specified (see 6.2), control testing shali include
33、 the applicable tests of table I, as specified in the contract. 5 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-LL7b7G m 0b 2057q58 bLb m MIL-PRF- 1 1767qAT) TABLED. Q& Title SamDle 1 Interface Support and ownership Extreme temperature oper
34、ation Pick-up voltage Drop-out voltage Contact voltage drop Vibration Time delay Pick-up voltage Drop-out voltage Contact voltage drop Shock Time delay Pick-up voltage Drop-out voltage Contact voltage drop SamDle 2 IIrtek Support and ownership Time delay Pick-up voltage Drop-out voltage Contact volt
35、age drop Vibration Time delay Pick-up voltage Drop-out voltage Corrtact voltage drop Waterproofkess Dielecic strength Time delay Pick-up voltage Drop-out voltage Contact voltage drop of first article test. Requirement 3.3-3.3.4 3.5.1-3.5.2,3.5.4, 3.5.5 3.6.8 3.6.4 3.6.5 3.6.7 3.4.1 3.6.1 3.6.4 3.6.5
36、 3.6.7 3.4.2 3.6.1 3.6.4 3.6.5 3.6.7 3.3-3.3.4 3.5.1-3.5.2,3.5.4,3.5.5 3.6.1 3.6.4 3.6.5 3.6.7 3.4.1 3.6.1 3.6.4 3.6.5 3.6.7 3.4.4 3.6.3 3.6.1 3.6.4 3.6.5 3.6.7 - Test 4.7 4.9 4.10.8 4.10.4 4.10.5 4.10.7 4.8.1 4.10.1 4.10.4 4.10.5 4.10.7 4.8.2 4.10.1 4.10.4 4.10.5 4.10.7 4.7 4.9 4.10.1 4.10.4 4.10.5
37、 4.10.7 4.8.1 4.10.1 4.10.4 4.10.5 4.10.7 4.8.4 4.10.3 4.10.1 4.10.4 4.10.5 4.10.7 6 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,- MIL-PRF-LL7b7G 9 999990b 2057459 552 MJL-PRF- 1 1767G(AT) TABLE II. Order of Title 5amde 3 ntehce Support and owners
38、hip rime delay Pick-up voitage Drop-out voltage Contact voltage drop perabng current Coil current rime delay Pick-up voltage Drop-out voltage Contact voltage drop SamDle 4 rzrterface Support and ownership Time delay Pick-up voltage Drop-out voltage Contact voltage drop Endurance test Time delay Pick
39、-up voltage Drop-out voltage Contact voltage drop st article test - Continued Requirement 3.3-3.3.4 3.5.1-3.5.2, 3.5.4, 3.5.5 3.6.1 3.6.4 3.6.5 3.6.7 3.6.2 3.6.6 3.6.1 3.6.4 3.6.5 3.6.7 3.3-3.3.4 3.5.1-3.5.2,3.5.4, 3.5.5 3.6.1 3.6.4 3.6.5 3.6.7 3.5.3 3.6.1 3.6.4 3.6.5 3.6.7 Test 4.7 4.9 4.10.1 4.10.
40、4 4.10.5 4.10.7 4.10.2 4.10.6 4.10.1 4.10.4 4.10.5 4.10.7 4.7 4.9 4.10.1 4.10.4 4.10.5 4.10.7 4.9.1 4.10.1 4.10.4 4.10.5 4.10.7 4.6 Verification methods. The types of verification methods included in this section are visual inspection, measurement, sample tests, full-scale demonstration tests, simul
41、ation, modeiiig, engineering evaluation, component properties analysis, and similarity to previously-approved or previously-qualified designs. 4.6.1 Verification alternatives. The mandadurer may propose alternative test methods, techniques, or equipment, including the application of statistical proc
42、ess control, tool control, or cost-effective sampling procedures, to verify performance. 4.7 Interface and interoperability verification. Conformance to 3.3 through 3.3.4 shall be determined using appropriate verification methods fiom 4.6 or 4.6.1. 7 Provided by IHSNot for ResaleNo reproduction or n
43、etworking permitted without license from IHS-,-,- MIL-PRF-11767G m 99999Ob 20574b0 274 MIL-PRF- 1 1767WAT) 4.8 Environmental vefication. After each of the following environmental tests, the relay assembly shall be subjected to the tests specified in 4.10.1,4.10.4,4.10.5, and 4.10.7, except for contr
44、ol tests which shall be conducted only at a temperature of 77 15F. 4.8.1 Vibration. To determine conformance to 3.4.1, the relay assembly (rigidly mounted without brackets or shock absorbers) shall be subjected to a simple harmonic motion having an amplitude of 0.03 inch (i.) (0.06 in. maximum total
45、 incursion), the fiequency being varied uniformly between the approximate limits of 10 to 55 Hertz (Hz). The entire Cequency range, from 10 to 55 Hz, shall be traversed in approximately one minute. This motion shall be applied for a period of one hour along each of three mutually perpendicular direc
46、tions. Pins E and G of the machine gun relay coil shall be connected to 28.5 Vdc power source for half of the time. To detede electrical malfunction of the relay assembly, contact opening or closing shall be monitored between pins A and D of relay assembly. 4.8.2 Shock. To determine conformance to 3
47、.4.2, the relay assembly (rigidly mounted without brackets or shock absorbers) shall be exposed to a hahine wave shock impulse of 25 & 3 gravity units for 6 to 9 milliseconds (ms) duration (see figure 1). The shock impulse shall be applied dong three mutually perpendicular axes. This test shall be c
48、onducted once in energized position and once in deenergize position of the relay assembly. When the relay is tested in the energized position, the maximum contact opening duration shall not exceed 2 ms. 1.15A % e-* b c t s A SINE WAVE TRANSLATED UP BY AN AMOUNT .15A SINE WAVE (DEAL) SINE WAVE TRANSL
49、ATED DOWN BY ANAMOUNT .15A .2 A O .2A I I I I I I I I I I I Vi=2ADIn v=vi f 10% FIGURE 1. Tolerances for half-siie shock pulse. 8 Provided by IHSNot for ResaleNo reproduction or networking permitted without license from IHS-,-,-MIL-PRF-LL7b7G 0b 20574bL LOO MIL-PRF- 1 1767G(AT) NOTE: The oscillogram should include a time about 3D long with the pulse located approximately in the c
