scope:

This is an advance copy of the dated document. The final document from Defense Automated Printing Service may be slightly different in format do to electronic conversion processes. Actual technical content will be the same.

This specification is approved for use by all Departments and Agencies of the Department of Defense.

The requirements for acquiring the product described herein shall consist of this specification and MIL-C-27715. Table II Detail calibration requirements.

Tripping time from −53.9°C to +93.3°C (time in seconds) ----------------------------------------------------------------------------- Dash Percent rated current number ----------------------------------------------------------------------------- 200 400 1000 3000 ----------------------------------------------------------------------------- Min Max Min Max Min Max Min Max ---------------------------------------------------------------------------------------- -2 -2V 12 32 2.3 6.5 .32 1.1 .04 .155 -5 -5V 14 36 2.5 6.5 4.5 1.1 .06 .13 -7 -7V 16 40 2.5 7.0 .34 1.1 .04 .12 -10 -10V 18 42 2.7 7.75 .45 1.2 .05 .125 -15 -15V 20 45 2.7 8.0 .36 1.2 .04 .13 -20 -20V 20 48 2.7 8.0 .36 1.2 .04 .12 -25 -25V 20 50 2.7 9.5 .36 1.2 .04 .12 -35 -35V 20 53 2.7 8.0 .36 1.2 .04 .12 -50 -50V 20 55 2.7 10.0 .36 1.4

TABLE III. Detail rupture current performance.

Calibrated fault Transient Test System Voltage before current voltage after Open circuit Condition fault (amperes) fault current voltage interruption ----------------------------------------------------------------------------------------------------- 6000 amperes during first cycle of fault 400 Hz current L-N 115/200 volts 120 ± 5 decreasing to 120 ± 5 3600 amperes within .05 second after initiation 4200 amperes during first cycle of fault 400 Hz current L-L 115/200 volts 200 ± 8 decreasing to 200 ± 8 2500 amperes within .05 second after initiation 6000 amperes 28 volts within in .01 to .03 .002 second 28 volts dc 30 ± 2 second after after 30 ± 2 initiation interruption 50 volts max.

TABLE IV. Coordination test pairs.

Lower rating (amperes) Higher rating (amperes) -------------------------------------------------------------- 2½ 5 5 10 7½ 15 10 20 15 35

TABLE V. Coordination trip time.

Rating (amperes) Trip time (seconds) at 2000 percent rated current min. ------------------------------------------------------------ 2½ 5 .124 7½ .088 10 .112 15 .089 20 .103 25 .102 35 .109 50 Nominal voltage rating: 28 Vdc or 115 V line to neutral or 200 V line to 400 Hz

Marginal notations are not used in this revision to identify changes with respect to the previous issue due to the extensiveness of the changes. )