INCH-POUND
MIL-DTL-26517B
16 June 2000
SUPERSEDING
MIL-P-26517A (USAF)
05 April 1961
DETAIL SPECIFICATION
POWER SUPPLY, TRANSFORMER-RECTIFIER, AIRCRAFT
GENERAL SPECIFICATION FOR
MIL-DTL-26517B remains inactive for new design and is no longer used, except for replacement purposes.
This specification is approved for use by all Departments and Agencies of the Department of Defense.
1. SCOPE
1.1 This specification covers general requirements for power supplies that convert power from a nominal
115/200 V, 400 Hz, alternating-current (AC) aircraft electrical system to direct-current power.
1.2 Classification. The power supplies will be of the following types and classes as specified (see 6.2):
TYPE
STYLE
DESCRIPTION
Type I
Regulated
Contains provisions for regulated output voltage and parallel
operation
Type II
Non-regulated
Does not contain provisions for regulated output voltage and
will depend on the inherent characteristics of the power
conversion elements to maintain voltage and provide
paralleling within the specified limits
CLASS
DESCRIPTION
Class A
Power supplies, which are self-cooled and designed to meet the altitude-
temperature requirements of Figure 1, curve II or industry equivalent.
Class B
Power supplies which are self-cooled and designed to meet the altitude-
temperature requirements of Figure 1, curve I or industry equivalent, except that
the temperature at sea level will be 125° C.
Class C
Power supplies which are forced-air cooled and designed to meet the
altitude-temperature requirements of Figure 1, curve I or industry equivalent,
except that the temperature at sea level will be 125° C.
Beneficial comments (recommendations, additions, deletions) and any pertinent data which may be of use in
improving this document should be addressed to: WR-ALC/TILCC, 420 Second Street Suite 100, Robins AFB, GA
31098-1640 by using the Standardization Document Improvement Proposal (DD Form 1426) appearing at the end of
this document or by letter.
AMSC N/A
FSC 6130
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