MIL-PRF-83383 Circuit Breakers, Remote Control, Thermal, Trip Free General Specification ForThis specification covers the general requirements and test procedures for single and triple pole, trip-free, thermal, remote control circuit breakers for use in electric systems conforming to MIL-STD-704. These remote control circuit breakers are capable of being remotely set or tripped and provide indication of the main contact position by use of a 0.5 ampere, push-pull, trip-free circuit breaker \(not covered by this specification\). These remote control circuit breakers include auxiliary contacts \(see 6.5.4\) and terminals for control/monitor circuits. Hereinafter, a remote control circuit breaker is referred to as an RCCB \(see 6.9\).

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MIL-PRF-83383E

c. Verification, every 36 months, that the group C periodic inspections have been performed as applicable (see

4.5.2.2). The inspections shall consist of the examinations and tests specified in table VI, in the order

shown. If test results indicate nonconformance with specification requirements, and corrective action

acceptable to the qualifying activity has not been taken, action may be taken to remove the failing product

from the QPL.

In the event that no production has occurred in this period, the contractor shall still verify to the qualifying activity that

the capacity to manufacture and test QPL RCCB's still exists and that the contractor wants to

remain on the QPL.

4.5 Conformance inspection.

4.5.1 Inspection of product for delivery. Inspection of product for delivery shall consist of group A inspection.

4.5.1.1 Inspection lot. An inspection lot shall consist of all the RCCB's covered by a single specification sheet

produced under essentially the same conditions within a period not to exceed 1 month, and offered for inspection at

one time.

4.5.1.1.1 Group A inspection. Group A inspection shall consist of the inspections specified in table III.

4.5.1.1.1.1. Sampling plan. Group A inspection shall be on an inspection lot basis. Samples shall be selected in

accordance with table lV, based on the inspection lot. If there are one or more failures, the inspection lot shall be

considered to have failed.

4.5.1.1.2 Rejected lots. If an inspection lot is rejected, the supplier may rework the lot to correct the defects or 100

percent inspect the lot and remove all defective parts. Reworked lots shall be resubmitted for inspection. Such lots

shall be separated from new lots and shall be clearly identified as reinspected lots. If one or more defects are found

in this second sample, the lot shall be rejected and shall not be supplied to this specification.

4.5.1.1.3 Disposition of sample units. Sample units which have passed all the group A inspection may be delivered

on the contract or order if the lot is accepted and the sample units are still within specified electrical tolerances.

4.5.2 Periodic inspection. Periodic inspection shall consist of groups B and C. Except where the results of these

inspections show noncompliance with the applicable requirements (see 4.5.2.2.3), delivery of products which have

passed group A shall not be delayed pending the results of these periodic inspections.

4.5.2.1 Group B inspection. Group B inspection shall consist of the inspections specified in table V, in

the order shown. Group B inspection shall be made on sample units selected from inspection lots which

have passed group A inspection.