MIL-DTL-917F(SH)
APPENDIX A
PROCEDURE FOR INSULATION SUITABILITY TESTS
A.1 SCOPE
A.1.1 Scope. This Appendix covers the insulation suitability testing procedure for insulation systems classified
at temperature of 356 °F (180 °C) or above or other insulation systems as specified by NAVSEA. This Appendix is
a mandatory part of the specification. The information contained herein is intended for compliance.
A.1.2 Purposes. The purpose of this test is to determine the insulation resistance (see A.3.5), dissipation factor
(see A.3.4), and capacitance (see A.3.1) of an electric winding insulated with silicone or other insulation under
conditions of severe moisture exposure.
A.1.3 Classification. Insulation suitability tests for electrical windings are of the following types and shall be
so designated in the application for test:
Type CW Complete Winding (see A.3.2)
Type PW Partial Winding (see A.3.7)
A.2 APPLICABLE DOCUMENTS
A.2.1 General. The documents listed in this section are specified in Appendix A of this specification. This
section does not include documents cited in other sections of this specification or recommended for additional
information or as examples. While every effort has been made to ensure the completeness of this list, document
users are cautioned that they must meet all specified requirements of documents cited in Appendix A of this
specification, whether or not they are listed.
A.2.2 Government documents.
A.2.2.1 Specifications, standards, and handbooks. The following specifications, standards, and handbooks
form a part of this document to the extent specified herein. Unless otherwise specified, the issues of these
documents are those cited in the solicitation or contract.
DEFENSE SPECIFICATIONS
MIL-DTL-2212
-
Contactors and Controllers, Electric Motor AC or DC, and Associated Switching
Devices
MIL-G-3111
-
Generators, Electric, Direct-Current (Naval Shipboard Use)
MIL-G-3124
-
Generator, Alternating Current, 60-Hertz (Naval Shipboard Use)
MIL-T-15108
-
Transformers, Power, Step Down, Single-Phase, 60 Hertz, 1 Kilovoltampere
Approximate Minimum Rating, Dry Type, Naval Shipboard
MIL-M-17059
-
Motor, 60-Cycle, Alternating-Current, Fractional H.P. (Shipboard Use)
MIL-DTL-17060
-
Motors, Alternating Current, Integral-Horsepower, Shipboard Use
MIL-T-17221
-
Transformers, Power, Distribution; Single Phase, 400 Hertz, Insulation System
Class 200 Deg. C, Dry (Air Cooler) (Naval Shipboard Use)
MIL-M-17413
-
Motors, Direct Current, Integral H.P. Naval Shipboard (Navy)
MIL-M-17556
-
Motor, Direct-Current, Fractional H.P. (Shipboard Use)
MIL-G-18473
-
Generators, Motors, and Auxiliary Equipment, Direct Current, Naval Ship
Propulsion
(Copies of these documents are available online at https://quicksearch.dla.mil.)
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