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Dielectric withstanding voltage |
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|  MIL-I-60231B(OS)
3.3 Materials. All materials used in the manufacture of the cartridges shall conform strictly to the
specifications referred to on the respective drawings unless specific approval in writing covering a departure
therefrom has been obtained from the cognizant Navy design activity prior to manufacture. When alternate
materials or methods of manufacture are specified on the drawings, the bidder's selections shall be clearly
stated in the proposal.
3.4 Electrical.
3.4.1 Dielectric withstanding voltage. The body assembly, prior to the assembly of the bridgewire, shall
not exhibit a leakage current in excess of 100 microamperes when subjected to 1000 volts of direct current
applied between pin and body.
3.4.2 Bridge circuit resistance. The bridge circuit resistance of the ignition element shall be 0.11 0.03
ohm.
3.5 Environmental.
3.5.1 Leakage. The ignition element shall not exhibit a leak rate of 1 x 10 4 cubic centimeters per second or
more when withstanding a dry leak test at a pressure differential of 14 psi.
3.5.2 Vibration. The ignition element shall withstand vibration testing in accordance with MIL-STD-810,
method 514.3, test procedure I, test condition I, with no evidence of disintegration of the propellant or
derangement of components. The ignition element shall not autoignite, shall be safe to handle, and shall meet
the requirements of 3.4.2, 3.5.1, 3.7.1, and 3.7.2 at 70 F following vibration testing.
3.5.3 Hydrostatic pressure. The body assembly shall be capable of withstanding a hydrostatic pressure of
10,000 psi without any evidence of mechanical failure or leakage (see 6.4.2).
3.6 Radiographic examination. Each ignition element shall be radiographically examined for defects (see
4.5.3.4).
3.7 Functional.
3.7.1 Maximum no-fire stimulus. The electrical ignition element shall not fire when a direct current of 1.5
amperes, maximum, is applied for 60 seconds.
3.7.2 All-fire stimulus. After the application of the maximum no-fire stimulus current, the electrical ignition
element shall fire within 50 milliseconds maximum when a direct current of 5.0 amperes is applied at
temperatures of 65 F, 70 F, and 200 F. The test fixture shall be temperature conditioned along with the
test unit. The electric ignition element shall deliver a pressure of 2000 psi minimum to 6000 psi maximum
when fired into a 1 cubic centimeter bomb. There shall be no evidence of blowback or mechanical failure of
the glass-to-metal seal (see 6.4.1 and 6.4.2).
3.7.3 Minimum all-fire stimulus. The ignition element shall fire within 50 milliseconds when a direct
current of 3.5 amperes is applied at temperatures of 65 F, 70 F, and 200 F. The electric ignition element
shall meet the requirements of 3.7.2. Data will be recorded for information only (see 6.4.1).
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