A-A-52482B
2.3.3 Endurance. The voltage drop shall be no greater than 500 millivolts after 50,000 cycles of operations during which the switch is energized by a 28 Vdc source and connected to the rated loads specified in 2.3.2. The torque required to operate the switch shall be no less than 30 (max 70, see 2.3.5) ounce-inches. The switch shall show no evidence of malfunction during the test.
2.3.4 Dielectric strength. No burning, charring, loosening, arcing or other damage should be evidenced when applying a 1,000 V root mean square (rms) voltage at a frequency of 60 cycles per second with the switch lever in each of its "on" and "off" positions. The applied voltage shall be increased from zero to the specified value at a rate of 400 V per second and shall be maintained between insulated terminals and ground for one minute on each application.
2.3.5 Operating torque. The average of five measurements of the torque applied to move the switch for each direction of movement from each position should not be less than 30 nor more than 70 ounce-inches.
2.3.6 Maximum torque. With the lever turned to each extreme position a torque load of 3 foot-pounds is applied to the switch. This load shall be applied gradually 5 times for each lever position and held for at least 10 seconds. No breakage, distortion or loosening of parts of the switch shall be evidenced. Subsequent to test, the switch shall meet the requirements of 2.3.1.
2.3.7 Terminal strength. The switch shall not evidence any damage, distortion or loosening of parts after applying for 10 seconds each a force of 25 pounds at the base of all terminals in four directions perpendicular to the longitude centerline of the terminals at 90E intervals, and a 25 pounds pull along the terminal axes centerline. More so, 2.3.1 and 2.3.4 requirements shall be maintained.
2.3.8 Shock resistance. The switch shall evidence no mechanical or electrical malfunction (opening or closing of circuit) during and after exposure to 3 sawtooth shock pulses, each of 50 gravities (g) peak amplitude for 7 milliseconds (ms) duration, in both directions of each of the three orthogonal axes for a total of 18 shock pulses. One axis shall be through, or parallel to, the plane of contact movement and the lever when in "off" position. The switch shall subsequently meet the requirements of 2.3.1
2.3.9 Vibration resistance. The switch shall evidence no electrical or mechanical malfunction when subjected to vibration for one hour along each of three mutually perpendicular axes, one of which shall be through or parallel to the switch shaft; the vibration shall be an harmonic motion having an amplitude of 0.03 inch (0.06 inch total excursion) in a frequency sweep from 10 to 55 and return to 10 Hertz (Hz) in one minute. The switch shall subsequently meet the requirements of 2.3.1, 2.3.5 and 2.3.6.
2.4 Environmental conditions.
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