MIL-DTL-3124E(SH)
y.
Packaging requirements (see 5.1).
6.3 First article. When first article inspection is required, the contracting officer should provide specific
guidance to offerors whether the item(s) should be a preproduction sample, a first article sample, a first production
item, a sample selected from the first production items, a standard production item from the contractor s current
inventory (see 3.1), and the number of items to be tested as specified in 4.4.2. The contracting officer should also
include specific instructions in acquisition documents regarding arrangements for examinations, approval of first
article test results, and disposition of first articles. Invitations for bids should provide that the Government reserves
the right to waive the requirement for samples for first article inspection to those bidders offering a product which
has been previously acquired or tested by the Government, and that bidders offering such products, who wish to rely
on such production or test, must furnish evidence with the bid that prior Government approval is presently
appropriate for the pending contract. Bidders should not submit alternate bids unless specifically requested to do so
in the solicitation.
6.4 Provisioning. Provisioning Technical Documentation (PTD), spare parts, and repair parts should be
furnished as specified in the contract or order.
6.4.1 Spare parts. When ordering spare parts or repair parts for the equipment covered by this specification, the
contract or order should state that such spare parts and repair parts should meet the same requirements and quality
assurance provisions as the parts used in the manufacture of the equipment. Packaging for such parts should also be
specified.
6.5 Definitions. The following definitions apply to the various technical terms wherever such terms appear in
this specification.
6.5.1 Air-gap line. The air-gap line is the extended straight-line part of the no-load saturation curve.
6.5.2 Amortisseur winding. An amortisseur winding is a winding consisting of a number of conducting bars
short-circuited at the ends by conducting rings or plates and distributed on the field poles of a synchronous machine
to suppress pulsating changes in magnitude or position of the magnetic field linking the poles.
6.5.3 Armature. The armature is that part of the generator which includes the main current-carrying windings.
6.5.4 Continuous duty. Continuous duty is a requirement of service that demands operation at a substantially
constant load for an indefinitely long time.
6.5.5 Conventional efficiency. Conventional efficiency is the ratio of output to input where input is determined
by addition of the component losses to the output.
6.5.6 Deviation factor. The deviation factor of a wave is the ratio of the maximum difference between
corresponding ordinates of the wave and the equivalent sine wave to the maximum ordinate of the equivalent sine
wave when the waves are superimposed to make the maximum difference as small as possible.
6.5.7 Direct axis. The direct axis is the axis of magnetization of the main field winding coinciding with the
polar axis.
6.5.8 Direct-axis voltage. A direct-axis voltage is a voltage generated by a flux in the direct axis.
6.5.9 Efficiency. The efficiency of a generator is the ratio of the useful power output to the total power input.
6.5.10 Negative-sequence impedance. The negative-sequence impedance is the rated current value of
impedance. The value of impedance is obtained from a single-phase short circuit applied between two terminals of
the generator when operating at rated speed, and with an excitation which circulates rated armature current in the
short-circuited phase. The negative impedance is defined as:
Negative-sequence impedance in per-unit (Z2) = 0.577E
I
Where:
E = The voltage, per-unit, between the open terminal and either of the short-circuited phases.
I = The sustained armature current, per-unit, measured in the short-circuited phase.
30
For Parts Inquires call Parts Hangar, Inc (727) 493-0744
© Copyright 2015 Integrated Publishing, Inc.
A Service Disabled Veteran Owned Small Business