MIL-PRF-39019F
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.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use.
6.1.1 General. Circuit breakers covered by this specification are intended primarily for use in the protection of
electronic circuits and should be used where starting inrushes of transient overloads are neither heavy nor prolonged
and the equipment must have relatively fast protection. These circuit breakers are military unique in that they
must operate satisfactorily under the following demanding conditions: Endurance testing of 10,000
mechanically performed make and break operations while energized to 100% of rated current, and they
must be fully sealed when submersed in addition to being panel sealed. These requirements are verified
under a qualification system. These circuit breakers should not be used in circuits (e.g., primary power circuits of
electric systems) whose short circuit current potential is greater than the interrupting capacity of the breaker unless
the circuit is properly protected by other means. These circuit breakers are not switches and should not be used as
such (see Engineering Practice Study, "Using Circuit Breakers as Switches" for more information).
6.1.2 Derating. Circuit breakers should continuously carry normal load current; however, the value chosen should
be the lowest rating that will not open the circuit breaker inadvertently. The following factors should be considered in
selecting the proper current rating and time delay curve of a circuit breaker:
a.
The average (steady state) conditions of the load.
b.
The initial start-up current and duration of the current of the equipment to be protected.
c.
Transient overloads and their duration.
d.
Comparison of the time delay characteristics of the circuit breaker with the time current characteristics
(including starting or overload surges) of the equipment, component, or wire.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of this specification, the applicable specification sheet, and the complete part number
(see 3.1).
b.
ASSIST Online database should be cited in the solicitation, and if required, the specific issue of individual
documents referenced. If not otherwise specified, the versions of the individual documents referenced will be
those in effect on the date of release of the solicitation (see 2.1).
c.
Packaging requirements (see 5.1).
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