MIL-R-5757J
4.6.11 Vibration (see 3.13).
4.6.11.1 Vibration (sinusoidal). Unless otherwise specified (see 3.1), relays shall be tested in accordance with method 204 of MIL-STD-202. The following details and exceptions shall apply:
a. Method of mounting: As specified in 4.6.10a.
b. Electrical-load conditions: For qualification and group C inspections, relays shall be tested with the coil energized for 2 hours at rated voltage (or current) and with the coil de-energized for 2 hours, in each of the three mutually perpendicular (x, y, and z) directions. Contacts shall be loaded as specified in 4.6.10d.
c. Test condition: D, except vibration level is the lesser of .195 inch (4.95 mm) double amplitude or 30 G, and frequency range is 10 Hz to 3,000 Hz.
d. Measurements during vibration: As specified in 4.6.10d.
e. For group A testing, only one cycle shall be performed over the frequency range of 100 Hz to 3,000 Hz unless otherwise specified (see 3.1). The relay shall be vibrated in the direction of contact motion. At the option of the manufacturer, the relay production lot may be divided in three equal groups and each group shall be tested in one of three mutually perpendicular axes (X, Y, and Z). When relays are tested as specified in the optional procedure, a failure of any relay in any axis shall require 100 percent inspection of all relays in the production lot in each axis. For all contact forms except contact form "A", the cycle shall consist of 3 minutes up with the coil energized with rated voltage (or current) and 3 minutes down with coil de-energized. The cycle for form contact "A" shall consist of 3 minutes up with the coil de-energized and 3 minutes down with
the coil energized.
f. Examination after test: Prior to removal from test fixture and without disturbing the relay, apply maximum over the temperature range pickup voltage value (see 3.1) to the coil, and then verify that relay contacts transfer. Remove coil voltage (or current), and then verify that relay contacts transfer. Failure of relay contacts to transfer shall be cause for rejection. After removal from test fixture, the relays shall then be inspected for evidence of structural failure or other damage which might impair the operation of the relay.
4.6.11.2 Vibration (random). Relays shall be tested in accordance with method 214 of MIL-STD-202. The following details and exceptions shall apply:
a. Method of mounting: As specified in 4.6.10a.
b. Electrical-load conditions: For qualification and group C inspections, relays shall be tested with the coil energized at rated voltage (or current) for 15 minutes and with the coil de-energized for 15 minutes, in each of three mutually perpendicular (x, y, and z) directions. When applicable to group A inspection, the test time
shall be 3 minutes for each state described above. Contacts shall be monitored as specified in 4.6.11.2d.
c. Test condition: IG (0.4 G2/Hz, 23.91 rms G).
d. Tests during vibration: As specified in 4.6.10d.
e. Examination after test: As specified in 4.6.11.1f.
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