MIL-DTL-17361G(SH)
c. Circuit breaker main and auxiliary contacts shall not open when closed. Momentary opening of the main
and auxiliary contacts of less than 0.010-second duration will be acceptable. Multiple contact bounces are
acceptable providing that the total elapsed time from the beginning of the first bounce to the end of the last bounce
does not exceed 0.015 second for auxiliary contacts and 0.060 second for main contacts.
d.
Adjustable trip unit settings shall not change position.
e. Fuse units shall not open the circuit, change protective characteristics, lose filler material, or show signs of
deformation.
f.
Electric operating mechanism control relays shall not cause the circuit breakers to change position/state.
4.5.14.4.2 Post-shock pass/fail criteria (manual cycling). Immediately after shock testing, the circuit breaker
shall be manually cycled from off to on three times without failure or operating irregularities.
4.5.15 Vibration. The circuit breakers on mounting bases/blocks with attachments, including current limiting
fuse units, shall be tested in both the open and closed positions in accordance with Type I tests of MIL-STD-167-1.
Circuit breaker states, energization, contact monitoring, and pass/fail criteria shall be the same as for shock testing.
4.5.16 Electromagnetic interference (EMI). Circuit breakers with electronic devices shall be tested in
accordance with MIL-STD-461 to verify compliance with the requirements specified in 3.4.10. Testing shall not
cause false tripping, failure of trip unit, or failure of attachments.
4.5.17 Voltage spike. Circuit breakers with electronic devices shall be tested in accordance with MIL-STD-
1399-300. Testing shall not cause false tripping, failure of trip unit, or failure of attachments.
4.5.18 Handle locking device operation. The handle locking device shall be installed with the circuit breaker in
the tripped position. An attempt shall be made to manually reset and close the circuit breaker. The circuit breaker
shall remain in the tripped position.
4.5.19 Handle boot operation and high temperature endurance.
4.5.19.1 Operation (manual cycling). With the handle boot installed on the circuit breaker handle, the circuit
breaker shall be manually cycled from off to on three times without failure or operating irregularities.
4.5.19.2 High temperature endurance. The handle boot shall be subjected to a temperature of 200 °C for a
period of 150 hours. There shall be no evidence of aging or effect on the transparency of the material.
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. Circuit breakers are to be used in electrical power systems to protect against overloads and
short circuits and to provide a switch for manually isolating circuits.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Circuit breaker type, AQB or NQB (see 1.2).
c.
If required, the specific issue of individual documents referenced (see 2.2.1 and 2.2).
d.
Voltage and frequency.
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