MIL-DTL-2212K(SH)
4.6.25 Mechanical interlock. Contactors and relays incorporating a mechanical interlocking feature
(see 3.16.1) shall be subjected to the following tests. With one contactor and relay held in the energized position as
specified herein, maximum operating voltage (see 3.4) shall be applied to the actuating coil of the opposing
contactor and relay for 50 cycles. The operational cycle shall consist of 0.5 seconds ON and 2.5 seconds OFF. The
specified 50 cycles of operation shall be applied under each of the following conditions:
a. The first contactor and relay being held in the energized position by applying maximum operating voltage
to the device's actuating coil.
b. The second contactor and relay being held in the energized position by applying maximum operating
voltage to the device's actuating coil.
c.
The first contactor and relay being held in the energized position by mechanical means.
d.
The second contactor and relay being held in the energized position by mechanical means.
4.6.26 Position sensing switch operational performance. Position sensing switches shall be operated at nominal
voltage and frequency. Specific electrical loads are not required. Switches shall be actuated for a minimum of five
operations at each checkpoint as specified herein:
a. Mechanical limit switches. Mechanical limit switches shall operate within the parameters specified in
b. Proximity switches. Proximity switches shall be actuated with the target moved in the slide-by
configuration to verify a minimum of five different checkpoints on the characteristic curve. The checkpoints shall
be spaced to represent 10 to 80 percent of the maximum sensing distance. The maximum sensing distance
checkpoint shall be verified by head-on target movement along the sensor axial centerline. Performance shall be in
accordance with the parameters specified in 3.16.6.4c.
c. Photoelectric switches. Photoelectric switches shall be actuated by manipulating the receiver and reflector
in a slide-by configuration to verify a minimum of five different checkpoints on the characteristic curve spaced to
represent 10 to 80 percent of the specified maximum sensing distance. Performance shall be in accordance with the
parameters specified in 3.16.6.5c.
4.6.27 Voltage ramp operation. Equipment shall be tested to ensure correct operation for the specified voltage
ramp rate. Equipment shall be tested at the minimum ramp rate and at a voltage step (0 Max voltage
instantaneously).
SSDC: 54 volts per second and voltage step
SSAC: 900 volts per second and voltage step
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. Controllers, controller parts, and associated switching devices covered by this specification
are intended for surface ship and submarine use. For special duty see 3.6.
6.2 Acquisition requirements. Acquisition documents should specify the following:
a.
Title, number, and date of this specification.
b.
Equipment with which associated (for example, pump, motor generator set, and so forth).
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