MIL-DTL-17361G(SH)
b. If the cause cannot be identified, an additional circuit breaker of the same frame type shall be randomly
selected and subjected to the production shock test. If it passes, production shall continue without disruption of
shipments. The circuit breaker that failed for unidentified causes shall be scrapped and a new one supplied by the
contractor, at no additional cost to the buyer.
4.4.3.5 Disposition. The circuit breaker and attachments that have been shock tested shall be inspected before
shipment to assure they meet the electrical and mechanical requirements specified herein. The circuit breaker shall
bear a label containing these words: "This circuit breaker has been production shock tested and is acceptable for
use."
4.5 Tests. All tests shall be conducted with the circuit breaker and fuse units (if applicable) installed on the
mounting base/block and all applicable attachments installed in the circuit breaker. Test numbers specified in this
section refer to those in Tables V and VI as noted. Refer to the applicable circuit breakers individual specification
sheet (see 3.1) for additional test information and requirements.
4.5.1 General examination. Circuit breakers and attachments shall be subjected to an examination to visually
verify that material, workmanship, and design are in compliance with this specification, the applicable drawings, and
MIL-E-917. Examination shall include, but need not be limited to, the following:
a.
Verify that design requirements are met (see 3.5.1 through 3.5.5, 3.5.10, 3.5.11, 3.5.18.2).
b. Verify that the circuit breaker has the correct overcurrent protection tripping device installed and when
applicable the correct current limiting device installed (see 3.5.16, 3.5.17).
c.
Circuit breaker outline and mounting dimensions are as specified (see 3.5.6).
d.
All arc chutes installed (see 3.5.9).
e.
Correct attachments are installed (see 3.5.19.3 through 3.5.19.8).
f.
Control wiring is as specified (see 3.5.19.4, 3.5.19.5).
g.
Markings are as specified (see 3.5.21).
h.
All cover screws installed and heads not frayed.
i.
No cracks in the cover, housing, mounting base/block, and interphase barriers (see 3.5.14.1.1, 3.5.14.1.2).
j. Slip connectors are correct style, properly formed and aligned, mounting screws properly torqued (see
3.5.18.3).
k. Operating handle securely installed: proper hole for tag present; "On" position is up when breaker mounted
vertically (see 3.5.7, 3.5.13).
l. Operating mechanism has quick-make, quick-break action and properly latches and unlatches (see 3.5.15.1,
3.5.15.2).
m. No blistering, shadowing, or flaking on plating (see 3.5.8).
n.
No blistering, flaking or fading on painted parts (see 3.5.12).
o.
Organic materials are properly treated for fungus.
p.
Breaker operation is not hindered by an attachment or accessory (see 3.5.15.4).
4.5.2 Creepage and clearance distances. Creepage and clearance distances shall be demonstrated by actual
measurement. Measurements shall be in accordance with MIL-E-917.
4.5.3 Trip-free operation. The circuit breaker shall be latched and closed and the operating handle blocked or
locked in the on position. The circuit breaker shall be tripped and verification shall be made that the contact arms
returned to the open position.
4.5.4 Dielectric strength.
4.5.4.1 Test equipment. Tests for dielectric strength shall be made with an alternating potential from a 1
kilowatt or larger power source having a sinusoidal wave shape. Semiconductors shall be shunted for protection
during tests.
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