MIL-PRF-83383E
4. VERIFICATION
4.1 Classification of inspections. The inspections and testing of RCCB's shall be classified as follows:
Qualification inspection (see 4.4).
a.
b.
Verification of qualification (see 4.4.5).
c.
Conformance inspection (see 4.5).
Periodic inspection (4.5.2).
d.
4.2 Test equipment and inspection facilities. The manufacturer shall establish and maintain a calibration system in
accordance with ANSI/NCSL Z540-1, ISO 10012-1, or equivalent system as approved by the qualifying activity.
4.3 Inspection conditions. Unless otherwise specified herein, all inspections shall be performed in accordance with
4.3.1 Power Supply. Unless otherwise specified herein, the power supply shall have no more than 10 percent
regulation at twice the specified load current. A dc power supply shall have no more than 5 percent voltage ripple.
An ac power supply shall be within 1 percent of the specified frequency and
shall be sinusoidal with a form factor between 0.95 and 1.25. The ac or dc power supply shall be
capable of simulating the normal and abnormal power conditions described in MIL-STD-704, with the following
exceptions:
4.3.1.1 AC power exception. The steady state voltage shall be 104 to 122 volts.
4.3.1.2 DC power exception. The steady state voltage shall be 18 to 32 volts.
4.4 Qualification inspection. Qualification inspection shall be performed at a laboratory acceptable to the
Government (see 6.3) on sample units produced with equipment and procedures normally used in production.
4.4.1 Sample size. Unless otherwise specified (see 3.1), 20 sample RCCB's for each specification sheet for which
qualification is sought, shall be submitted for testing in accordance with table II. If qualification is sought for less than
the entire family of ratings, the total qualification lot size shall be kept at 20 samples to insure coverage of all test
conditions specified in table II. No failures shall be allowed in the 20 sample units.
4.4.2 Inspection routine. The sample units shall be subjected to the inspections specified in table II, in the order
shown. A new sample unit may be chosen to avoid conducting interrupting capacity and coordination tests on the
same unit. If a new sample is chosen, it shall be used for the coordination test with calibration in accordance with
4.6.4 and 3.7 performed before and after the coordination test. In the event less than 13 current ratings are being
qualified, 20 sample units are still required. The additional sample units shall be of the highest current rating being
qualified.
4.4.3 Failures. One or more failures shall be cause for refusal to grant qualification approval.
4.4.4 Extent of qualification. Qualification of RCCB's with auxiliary contacts will also grant qualification to RCCB's
that are identical without auxiliary contacts.
4.4.5 Verification of qualification. To retain qualification, the contractor shall provide verification to the qualifying
activity for the following items every 12 months, unless otherwise specified:
a. Design of the circuit breaker has not changed.
b. Verification that the conformance inspections have been performed on inspection lots supplied to the
requirements of this specification. The inspections shall consist of the examinations and tests specified in
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