MIL-DTL-2212K(SH)
3.17.3.4 Temperature switches. Temperature switches shall withstand the tests specified in 4.6.5.4 without
damage other than a shift in setpoint which shall not exceed 3 percent for the 18 blows. Post-test reference
measurements shall conform to the requirements of 3.16.6.2.
3.17.3.5 Resilient mounting. When the momentary opening (see 6.8.51) of closed contacts, or the momentary
closing of open contacts, of components within a controller as specified in 3.17.3 is not acceptable, resilient mounts
may be utilized as approved by NAVSEA. Resilient mounts shall be helical cable (wire rope) type constructed of
noncorrosive nonferrous materials (except fasteners) and shall meet the requirements of MIL-S-901,
MIL-STD-167-1, and the salt spray test, Method 101D, 96 hours, of MIL-STD-202. Controllers with resilient
mounts attached shall meet the requirements of 3.17.3 when shock tested as specified in 4.6.5 (see 6.2).
3.17.4 Insulation resistance. Insulation resistance shall be not less than 10 megohms when tested as specified
in 4.6.7.
3.17.5 Dielectric (see 6.8.97). Controllers, contactors, and associated switching devices shall be able to
withstand the dielectric tests specified in 4.6.8 without electrical breakdown such as corona, flashover, spark over
(surface discharge), or breakdown (puncture).
3.17.6 Terminal strength. The terminals of the contactors and control relays shall withstand the terminal
strength requirements of MIL-STD-202 when tested as specified in 4.6.13.
3.17.7 Inclination. Controllers, contactors, and associated switching devices shall meet the following
requirements for inclined operation when tested as specified in 4.6.6:
a. Surface ships. Equipment shall operate when permanently inclined in any direction at any angle up to
15 degrees from the normal operating position. Equipment shall be constructed to function without damage during
temporary inclinations such as produced by ship's rolling of 45 degrees in any direction from the normal operating
position.
b. Submarines. Equipment shall operate when permanently inclined in any direction at any angle up to
30 degrees from the normal operating position. Equipment shall be constructed to function without damage during
temporary inclinations such as produced by ship's rolling of 60 degrees in any direction from the normal operating
position.
3.17.8 EMI. All electronically-based control circuit devices and associated switching devices shall meet the
EMI requirements of MIL-STD-461 and DOD-STD-1399-70-1 for surface ship and submarine equipment when
tested as specified in 4.6.14.
3.17.9 Pickup (see 6.8.54) and dropout (see 6.8.24) voltage. When tested as specified in 4.6.11, AC contactors
and relays shall pull in (pickup and seal [see 6.8.53]) below 80 percent and drop out above 10 percent of rated
voltage. DC contactors and relays for surface ships shall pull in below 68 percent and drop out above 5 percent of
rated voltage. Surface ship AC and DC contactors and relays shall operate between the pull in voltage and
110 percent of rated voltage. DC (250 V nominal) contactors and relays for submarines shall pull in below
160 VDC and drop out above 13 VDC. Submarine DC contactors and relays shall operate between the pull in
voltage and the upper limit specified (see 3.4.2.2).
3.17.10 Noise. When specified (see 6.2), AC controllers for low noise applications shall meet the
structureborne noise requirements for Type III equipment of MIL-STD-740-2, and airborne noise requirements for
Grade A3 and A12 equipment of MIL-STD-1474.
3.17.11 Electrical service conditions. Motor controllers and other solid-state switching devices shall operate
properly under the electrical service conditions specified herein.
3.17.11.1 Steady-state voltage and frequency. Equipment shall operate when tested as specified in 4.6.17.
3.17.11.2 Transient voltage and frequency. Equipment shall operate when tested as specified in 4.6.18.
3.17.11.3 Spike voltage. Equipment shall operate when tested as specified in 4.6.19.
3.17.11.4 Power interruption. Equipment shall operate when tested as specified in 4.6.20.
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