MIL-DTL-17587C(SH)
4.5.13.3.3 Emission indicator. When specified in the qualification package, an indicator consisting of three
layers of cheesecloth shall be employed to detect any excessive emission of flame, hot gases, or molten particles
during the interruption test. The cheesecloth shall be loosely stretched on a frame at least as large as the front of the
circuit breaker enclosure and shall be located 1 inch from, and parallel to, the front door of the circuit breaker
enclosure. The cheesecloth may be displaced as necessary to accommodate projections such as handles.
4.5.13.4 Post-interrupting current duty cycle performance. See Table V for testing required after interrupting
current duty cycle.
4.5.14 Shock. Circuit breakers with attachments shall be installed in the cradle and the entire configuration
mounted in the bottom compartment of the switchgear unit as specified in 3.4.5, and shall withstand the Grade A,
Type I shock requirements of MIL-S-901. Circuit breakers shall be tested in both the closed and open positions in
accordance with MIL-S-901. All testing shall be conducted on one sample.
4.5.14.1 Test setup. The following criteria shall be met:
a. All continuous current duty attachments shall be energized to simulate actual operating conditions.
b. Circuit breakers shall be energized at 12 VDC and any convenient current level.
c. A recording oscillograph or other means shall be used to check the status of the contacts under shock.
4.5.14.2 Performance during shock tests. Circuit breakers shall meet the following criteria during shock:
a. Shall not open when closed. Momentary opening of the main and auxiliary contacts of not more than 0.02-
second duration shall be acceptable.
b.
Shall not close when open.
4.5.14.3 Post-shock performance. See Table V for testing required after shock.
4.5.15 Vibration. Circuit breakers with attachments shall be installed in the cradle and shall be subjected to
Type I vibration tests of MIL-STD-167-1. The switchgear unit shall be supported at each corner near the top of the
circuit breaker compartment, by a 0.375-inch by 4-inch angle iron brace, extending diagonally on a 30-degree angle
to the platform of the vibration machine. The tests shall be performed with the circuit breakers in the open position
and repeated with the circuit breakers in the closed position. Circuit breakers shall be tested in the closed position
while energized at 12 VDC and any convenient current level. Attachments shall be energized during all tests, to
simulate actual operating performance.
4.5.15.1 Performance during vibration tests. The criteria of 4.5.14.2 shall be met with the exception that no
contact opening or chatter shall be acceptable during the tests.
4.5.15.2 Post-vibration performance. See Table V for testing required after vibration.
4.5.16 Electromagnetic interference (EMI). Circuit breakers with electronic trip devices shall meet and
demonstrate compliance with the requirements of MIL-STD-461 for Surface Ship, Below Deck, Metallic Hull
installations.
4.5.17 Voltage spike. Circuit breakers with electronic trip devices shall be tested in accordance with
MIL-STD-1399-300. Voltage spikes shall not cause failure of trip units (including false tripping) and attachments.
4.5.18 Post EMI and voltage spike performance. See Table V for testing required after EMI and voltage spike.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
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