MIL-PRF-11021H
3.4.2 Voltage drop. When a current load of 10 amperes is applied to each circuit except
the panel lamp dim circuit, the voltage drop shall be not more than 320 millivolts (mV). The
voltage drop through the panel lamp dim circuit shall be 12 volts + 10% at 0.40 amperes
(see 4.6.2).
3.4.3 Circuit breaker continuous current capacity and ultimate trip current. At each
ambient air temperature specified in TABLE III, the switch assembly circuit breaker shall carry
the continuous current specified for that temperature without tripping or causing other current
interruption. Subsequent to carrying the continuous currents and while at the specified
temperatures, the ultimate current load shall be applied and the circuit breaker shall open in not
more than 60 minutes (see 4.6.3).
3.4.4 Circuit breaker high temperature reclosing. When the switch assembly is
conditioned at a temperature of 180°F + 5°F, a 60 ampere current shall be passed through the
switch assembly circuit breaker until tripping occurs. Subsequent to tripping, the contacts shall
reclose in not more than 30 minutes (see 4.6.4).
3.4.5 Circuit breaker no-current trip temperature. When carrying no current, the switch
assembly circuit breaker shall not trip at temperatures below 265°F (129°C) (see 4.6.5).
3.4.6 Circuit breaker speed of operation. At specified overload currents, the switch
assembly circuit breaker shall meet the minimum and maximum opening time requirements
specified in TABLE I (see 4.6.6). The switch assembly circuit breaker must not reset sooner than
30 seconds for each of the specified overload currents.
3.4.7 Circuit breaker overload characteristics. With the switch assembly connected as
shown in Figure A2, and demand-currents of 26, 30, 50, 120, and 200 amperes applied to the
switch assembly circuit breaker, the effective current shall be from 15 to 26 amperes (see 4.6.7).
3.4.8 Overload. Each switch circuit shall withstand 575 + 25 amperes of current applied
five times with the circuit breaker opening and resetting each time. The switch shall
subsequently meet the requirements of 3.4.1 and 3.4.2 (see 4.6.8).
3.4.9 Circuit breaker resistance to short circuit. After meeting the requirements of 3.4.8,
the switch assembly shall be further tested as specified. During testing, the tested circuit shall
permanently open or after testing, the switch assembly circuit breaker shall have a continuous
current capacity of 21.0 amps and an ultimate trip current of 29.0 amps (see 4.6.9).
3.4.10 Circuit breaker endurance. The switch assembly circuit breaker shall meet the
opening time requirement of 3.4.6 when being subject to a 40 amp current for not less than 2,000
cycles. Upon completion of cycling, the switch assembly's circuit breaker shall meet the
requirements of 3.4.3 for any ambient temperature of 77 + 5°F (25 + 3°C) (see 4.6.10).
3.4.11 Conditions after rupture. Each of the switch assembly circuits shall be subjected
to a rupture current of up to 2000 amps and 100 VDC (except for the circuit with the series wired
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