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Dielectric withstanding voltage |
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|  MIL-C-11272D
w/Amendment 1
4.6.2 Dielectric withstanding voltage (see 3.5). Capacitors shall be tested in accordance with method 301 of MIL-
STD-202. The following details and exceptions shall apply:
*
a.
Magnitude and nature of test potential: a minimum of 200 percent - 2 percent of the dc rated voltage (see
3.1).
b.
Duration of application of test voltage: Not less than 1 second nor more than 5 seconds.
c.
Points of application of test voltage: Between the terminals.
d.
Limiting value of surge current: Shall not exceed 50 milliamperes (mA).
e.
Examinations after test: Capacitors shall be examined for evidence of damage, arcing, and breakdown.
4.6.3 Barometric pressure (see 3.6). Capacitors shall be tested in accordance with method 105 of MIL-STD-202.
The following details shall apply:
a.
Method of mounting: Not applicable.
b.
Test-condition letter: B.
*
c.
Tests during subjection to reduced pressure: minimum of 150 percent - 2 percent of the dc rated voltage
(see 3.1) shall be applied between the terminals for not less than 1 second nor more than 5 seconds.
d.
Examinations after test: Capacitors shall be examined for evidence of damage, arcing, and breakdown.
4.6.4 Insulation resistance (see 3.7). Capacitors shall be tested in accordance with method 302 of MIL-STD-202.
the following details shall apply:
*
a.
Test potential: A dc potential equal to a minimum of the dc rated voltage - 2 percent of dc rated voltage
(see 3.1).
b.
Points of measurement: From terminal to terminal. (Condensed moisture may be removed by a blast of
air.)
4.6.5 Capacitance (see 3.8).
4.6.5.1 Qualification inspection. Capacitors shall be tested in accordance with method 305 of MIL-STD-202. The
following details shall apply:
Test frequency - 1 MHz 200 kHz when the capacitance is 1,000 pF or smaller, and 1 kHz 100 Hz when
a.
the capacitance is greater than 1,000 pF.
Limit of accuracy - Shall be 0.2 percent or 0.2 pF, whichever is greater.
b.
4.6.5.2 Conformance inspection. Capacitors shall be tested in accordance with method 305 of MIL-STD-202.
The following detail shall apply:
Test frequency - 1 kHz 100 Hz, or 1 MHz 200 kHz. Capacitance measurements made at 1 kHz shall be
a.
referred to measurements made at a frequency of 1 MHz.
4.6.6 Dissipation factor. Dissipation factor shall be measured at a frequency of 1 kHz 100. Measurement
accuracy shall be within 2 percent or 0.0005, whichever is greater, for dissipation factor and within 5 Hz for
frequency (see 3.9).
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