MIL-DTL-17361G(SH)
6.4.21 Quick-make. A circuit breaker is quick-make when it has high contact closing speed independent of the
operator.
6.4.22 Rated short-time current (for AQB-A1602 only). The rated short-time current is the maximum current
which a circuit breaker will carry without injury for specified short-time intervals. The rating recognizes the
limitations imposed by both thermal and electromagnetic effects.
6.4.23 Removable mounting. Removable mounting applies to a circuit breaker or current limiting fuse unit
which has slip (separable) type disconnecting copper connections. Its frame is mounted by means of supporting
screws.
6.4.24 Reset time (at interrupting rating). Reset time is the minimum time interval between automatic tripping
of the circuit breaker at its full interrupting rating and the condition which will allow reclosing of the operating
mechanism.
6.4.25 Shunt trip. Shunt trip signifies the opening of a circuit breaker by energizing a trip coil from a source
external to the circuit breaker. The trip coil circuit is closed through a relay, switch, or other means.
6.4.26 Time, interrupting. That time from initiation to cessation of the overload or fault current including
detection, unlatching, contact separation, and arcing.
6.4.27 Trip free. A circuit breaker is deemed trip free from the operating handle when the means for operation
are such that the contacts cannot be held the closed position under trip conditions. The construction is such that
when the operating handle or other manual operating device is held in the on position and the circuit breaker is
tripped automatically, the contacts will not automatically return to the closed position.
6.4.28 Tripping time. Tripping time is the total interval of elapsed time from the instant of applying a given
overcurrent to the circuit breaker and the completion of the interruption of the circuit at rated voltage.
6.4.29 Trip unit, adjustable. An adjustable trip unit is an assembly containing the automatic trip devices of the
circuit breaker with adjustable trip characteristics as described in the requirements of 3.1.
6.4.30 Type. Circuit breaker type is an arbitrary designation used to differentiate performance characteristics.
6.4.31 Unit operations. Unit operations are of two types, namely, an "O" cycle, where the circuit breaker opens
the circuit only, and a "CO" cycle, where the circuit breaker closes the circuit followed immediately by its opening
without purposely delayed action.
6.5 Provisioning. Provisioning Technical Documentation (PTD), spare parts, and repair parts should be
furnished as specified (see 6.2). When ordering spare parts or repair parts for the equipment covered by this
specification, the contract should state that such spare parts and repair parts should meet the same requirements and
quality assurance provisions as the parts used in the manufacture of the equipment. Packaging for such parts should
also be specified.
6.6 Technical manuals. Technical manuals should be furnished as specified (see 6.2).
6.7 Certification data. Certification data sheets should include applicable data listed in the identification plate
and classification table shown on Figure 1.
6.7.1 Condition of omission of drawings and certification data sheets. Unless otherwise specified (see 3.3),
when a circuit breaker is a part of an assembly (such as a switchboard), individual circuit breaker drawings and
certification data sheets need not be furnished. The applicable drawings and certification data sheets should,
however, be indicated on the switchboard or assembly drawings, together with complete descriptive data for the
circuit breaker.
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