MIL-DTL-3965H
4.7.4 Insulation resistance (style CL55 and insulated styles only, see 3.1 (see 3.8)). Capacitors shall be tested in
accordance with method 302 of MIL-STD-202 as specified in 4.7.4.1 or 4.7.4.2.
4.7.4.1 Style CL55. The following details and exception shall apply:
Test potential: 200 V dc ±10 percent.
a.
b.
Special preparation: The two terminals shall be electrically connected together before application of voltage
and shall remain connected for the insulation resistance measurement.
c.
Points of measurement: Between terminals and case.
4.7.4.2 Insulated style (see 3.1). The following details and exception shall apply:
Test condition: B (500 V dc ±10 percent).
a.
b.
Points of measurement: Between the capacitor case and a V-block in intimate contact with the sleeving.
c.
Electrification time: 1 minute +0 -15 seconds.
4.7.5 DC leakage (see 3.9). DC leakage shall be measured with the dc rated voltage (see 3.1) applied. The
electrification period shall be as follows:
a.
For qualification inspection: 5.5 minutes.
b.
For quality conformance inspection: Within 5 minutes.
For nonpolarized capacitors, measurements shall be made in both directions.
NOTE: DC leakage shall always be the first measurement when dc leakage, capacitance, and
dissipation factor measurements are made concurrently.
4.7.6 Capacitance (see 3.10). Capacitors shall be tested in accordance with method 305 of MIL-STD-202. The
following details shall apply:
a.
Test frequency: As specified in 4.3.2.1
b.
Limit of accuracy: Within 2 percent.
c.
Magnitude of polarizing voltage (bias voltage): As specified in 4.3.2.1.
4.7.7 Dissipation factor (see 3.11). The dissipation factor shall be determined by a polarized bridge.
Measurement accuracy shall be within 2 percent.
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