MIL-PRF-55629E
APPENDIX A
A.3.2 Sample for specification sheet 13 through sheet 19. Eighteen circuit breakers, as follows, shall give
complete qualification for this major design set. Six circuit breakers in each frequency rating consisting of two
breakers (one in the minimum current and one in the maximum current rating) in each of the tripping time delays.
One half of the sample units shall be in the front mounted design with auxiliary contacts (7 three pole and 2 four pole
units) and the other half to be in the 3-pole back mounted design. The sample units shall be divided into three
subsets of dc, 60 Hz, and 400 Hz units, each subset represented by the longest, medium, and fastest time delays.
NOTE: For multipole circuit breaker designs not assembled from single-pole devices, contact the qualifying activity
for sampling plan. In the event less than complete qualification is desired, contact the qualifying activity.
A.3.3 Sample for specification sheet 20 through sheet 22. Qualification for MIL-PRF-55629/20 through MIL-PRF-
55629/22 may be gained as defined in A.3.1 using the same criteria as for specification sheet 7 through sheet 12.
When the operating mechanism, except for the handle and actuating linkage are identical in both mounting designs,
the 42 sample units may be divided equally between the standard mounting style and the panel seal design, i.e., 21
sample units of MIL-PRF-55629/8 and 21 sample units of MIL-PRF-55629/20 successfully passing qualification will
In the event qualification currently exists for specification sheet 7 through sheet 12 and is sought for specification
sheet 20 through 22 and the operating mechanism, except for the handle and actuating linkage are identical to the
previously qualified designs, one sample unit of the one, two, and three pole design shall be submitted with time
delay L, delay N, and delay R represented by two poles each. The one and two pole sample units shall be the lowest
current and the three pole the highest current rating for which qualification is sought.
Tests to be conducted on the sample units are: One pole and two pole sample units; shock, high-temperature and
low-temperature, and while being held at each temperature, perform high inrush, 125 percent or 150 percent (see
3.1) and 800 percent calibration.
Three pole sample unit; vibration, high inrush, 125 percent or 150 percent (see 3.1) and 1,000 percent calibration.
All sample units; dielectric withstanding voltage, actuator strength, actuator operating force, and panel seal. No
failures will be allowed in the three sample units.
A.3.4 Test data. When examinations and tests are to be performed at a Government laboratory prior to
submission, all sample units shall be subjected to all of the examinations and tests indicated as nondestructive in
table I. Each submission shall be accomplished by the test data obtained from these examinations and tests. The
performance of the destructive tests by the contractor on a duplicate set of sample units is encouraged, although not
required. All test data shall be submitted in duplicate.
A.3.5 Certification of material. When submitting samples for qualification, the contractor shall submit certification,
in duplicate, that the materials used in his components are in accordance with the applicable specification
requirements.
A.3.6 Description of items. The contractor shall submit a detailed description of the circuit breakers being
submitted for qualification, including materials used for the envelope.
A.4 EXTENT OF QUALIFICATION
A.4.1 Extent of qualification. The current rating range included in the qualification of circuit breakers covered by
any one specification sheet will be between the two extreme current ratings (highest and lowest) that pass the
required qualification inspection. Qualification of circuit breakers with auxiliary contact terminals will also grant
qualification to circuit breakers that are identical without auxiliary contact terminals. Qualification is extended to any
combination of poles with current ratings between the two extremes qualified and in the time delay curves qualified.
For specification sheet 1 through sheet 6, qualification to time delay K, delay L, delay M, delay N, delay P, delay R,
and delay S will also grant qualification to time delay A through delay G.
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