MIL-DTL-17361G(SH)
APPENDIX A
d. The settings in the conversion tables are to be used as recommendations only. They do not replace or
supersede circuit breaker settings determined by coordination studies or other analyses.
A.3.8.2 How to use conversion tables. As an example of how the conversion tables could be used, consider the
following scenario:
A hull has thermal magnetic circuit breakers installed throughout the ship. An AQB-A800 circuit breaker
malfunctions and cannot be repaired. The ship needs to order another AQB-A800 but determines this frame size is
obsolete and there are no replacements available. As an alternative, the ship could use an electronic AQB-A802
which is a form and fit replacement for the obsolete circuit breaker. To make the electronic circuit breaker
functionally equivalent with respect to continuous current rating and instantaneous characteristics, the user would
note the trip unit amp rating and instantaneous pickup settings on the original AQB-A800 and use Table A-XVII
below to set the AQB-A802.
TABLE A-VI. AQB-A101 / A102 conversion settings /1.
AQB-A101 settings (SPD or
SPD AQB-A102 type "E" equivalent settings
Cutler-Hammer/Westinghouse)
Short-time
Instantaneous
Instantaneous
delay pickup
Trip element
Trip element rating
pickup (amps)
pickup (amps)
(amps)
15A
LO (90)
15
6X (90)
5X (75)
15A
HI (195)
15
13X (195)
10X (150)
25A
LO (150)
25
6X (150)
5X (125)
25A
HI (325)
25
13X (325)
10X (250)
50A
LO (300)
50
6X (300)
5X (250)
50A
HI (650)
50
13X (650)
10X (500)
75A
LO (450)
75
6X (450)
5X (375)
75A
HI (975)
75
13X (975)
10X (750)
100A
LO (600)
100
6X (600)
5X (500)
100A
HI (1300)
100
13X (1300)
10X (1000)
NOTE:
/1 See MIL-DTL-17361/4 for complete details on available settings.
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