MIL-DTL-17587C(SH)
4.4 Comparison inspection of circuit breakers, attachments, and cradles. At intervals of not more than 3 years
during which circuit breakers of a type have been acquired under this specification, the manufacturer shall provide
sample production circuit breakers and production cradles with all attachments and conduct complete qualification
tests in the order specified in Table V. Any exceptions or changes to the test order shall be addressed in the
qualification package. Circuit breakers of a type which have not been supplied within the three-year period shall be
tested as a part of the subsequent order for production line units. Failure of a sample to meet the requirements of
this specification shall be cause for removal from the qualified products list.
4.5 Qualification inspection and comparison inspection tests. All tests shall be conducted with the circuit
breaker installed in the cradle and all applicable attachments installed in the circuit breaker. See applicable
specification sheets for additional test requirements.
4.5.1 General examination. Circuit breakers and attachments shall be subjected to a thorough examination to
determine that the material, workmanship, safety to operating personnel, design, and construction are in
conformance with this specification and applicable drawings. Examination shall include, but need not be limited to,
the following:
a. Electrical connections and wiring are as specified.
b. Orientation of DC poles is as specified.
c. Insulation is as specified.
d. Circuit breaker frame is as specified.
e. Manual handle is adaptable for dead-front, flush-mounted circuit breaker application.
f. All electric closing devices are mounted on the removable element of the circuit breaker.
g. Control transformer is located as specified.
h. All attachments provided as specified.
i. Manual operating handle is provided for an electrically operated circuit breaker.
j. Mechanical position indicator is provided.
k. Outline and mounting dimensions are as specified.
l. Overcurrent protection devices are provided as specified.
m. Indicator furnished as specified.
n. Secondary disconnects provided as specified.
o. Designation and marking are as specified.
p. Painting and insulation as specified.
4.5.2 Creepage and clearance. Creepage and clearance distances shall be demonstrated by actual measurement.
Unless otherwise specified in the specification sheets, distances shall be in accordance with MIL-E-917.
4.5.3 Attachment operating characteristics. Electric closing devices, undervoltage release devices,
undervoltage lockout devices, shunt trips, auxiliary switches, secondary disconnecting devices, hold-closed
mechanisms, operations counters, mechanical position indicators, indicator lights, TOPU devices, position indicators
for rack-in/rack-out, and cell switches shall be tested to verify they operate in accordance with requirements
specified herein. See Table V for details on how and when to test attachments.
4.5.3.1 Undervoltage lockout device operation.
4.5.3.1.1 Energized. The undervoltage lockout device shall remain energized during test numbers 3A through
3F(2) of Table V. It shall be verified that the undervoltage lockout device does not affect the circuit breaker
operation and does not trip a closed circuit breaker.
4.5.3.1.2 De-energized. The undervoltage lockout device shall be de-energized for test number 3G of Table V.
It shall be verified that the undervoltage lockout device prohibits closing of an open circuit breaker.
22
For Parts Inquires submit RFQ to Parts Hangar, Inc.
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business