MIL-DTL-83538 Connectors And Accessories, Electrical, Circular, Umbilical, Environment Resistant, Removable Crimp Contacts For Mil-Std-1760 Applications \(Metric\), General Specification ForThis specification covers connectors and accessories, electrical, circular, umbilical. The connector assembly provides the necessary connections required to meet MIL-STD-1760, class I electrical interface between stores and their associated launchers using a "blind mating" mechanism. The connector assembly consists of a receptacle installed on the launcher, a receptacle installed on the store, and a buffer plug installed between the two receptacles. This specification also includes the required mounting adapters and nut, accessory adapter, cable bushing, and protective covers \(see 6.1 for details on intended use and application\). The connectors covered by this specification are intended for use with launcher mechanisms with an applied holding force in the range 271 Newtons \(61 lbs\) to 427 Newton \(96 lbs\).

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MIL-DTL-83538D

4.6.8 Dielectric withstanding voltage. See 3.12.

4.6.8.1 Dielectric withstanding voltage at sea level. Not applicable for coaxial and triaxial contacts.

Wired, unmated store receptacle and combined launcher receptacle/buffer plug connectors shall be

tested in accordance with test procedure EIA-364-20. Connectors shall be mated when testing after

altitude immersion, humidity, and altitude (low temperature). The following details and exceptions shall

apply:

a. The magnitude of the test voltage shall be as specified in table XI.

b. Fifty percent of each contact size available shall be tested, but in no case shall less than six

dielectric withstanding voltage readings be taken. If the number of contacts is three or less, all

contacts shall be tested. The test voltage shall be applied between each wired contact, and each

adjacent contact, and the shell.

c. The test voltage shall be maintained at the specified value for 2 seconds minimum.

d. For quality conformance, simulated contacts and special techniques may be used.

TABLE XI. Test voltages, ac rms, 55 � 7 Hz.

Altitude

Service rating N

Mated

Unmated

Sea level

1,000

15,240 meters (50,000 feet)

600

400

21,336 meters (70,000 feet)

600

260

30,480 meters (100,000 feet)

600

200

4.6.8.2 Dielectric withstanding voltage at altitude. Mated connectors and unmated connector halves

with pin contacts shall be tested in accordance with test procedure EIA-364-20. The following details and

exceptions shall apply:

a. The magnitude of the test voltages shall be as specified in table XI.

b. Fifty percent of each contact size available shall be tested, but in no case shall less than six

dielectric withstanding voltage readings be taken. If the number of contacts is three or less, all

contacts shall be tested. The test voltage shall be applied between each wired contact and each

adjacent contact and the shell.

c. The test voltage shall be maintained at the specified value for 2 seconds minimum.

d. The leads of all test circuits shall be brought out through the walls of the chamber. There shall be

no wire splices inside the chamber. The wire ends of all leads shall be unsealed.

e. The chamber shall be evacuated to each of the specified altitude pressure equivalents as listed.

Altitude

Equivalent pressure

15,240 meters (50,000 feet)

87 torr

21,336 meters (70,000 feet)

33 torr

30,480 meters (100,000 feet)

8 torr