MIL-DTL-17060G(SH)
4.6.22 Partial discharge inception voltage (for inverter duty insulation systems). Partial discharge inception
voltage (see 6.6.2) shall be measured in accordance with IEC 61934 and IEC 60034-18-41. The environment the
motor insulation shall withstand is classified as Type 1, Stress Category D as defined in IEC 60034-18-41.
Guidance on the test procedure is provided in IEC 61934. The waveform for the test shall be an impulse voltage
with a magnitude of at least 3000 volts and a risetime between 100 and 300 nanoseconds. The equipment used to
measure the inception voltage shall be any commonly used equipment for the purpose of detecting and measuring
regular occurrences of partial discharge pulses. It is recommended the measuring equipment have a bandwidth
between 50 KHz and 20 MHz.
4.6.23 Electromagnetic interference testing (for variable speed drive motors). Motors shall be tested in
accordance with MIL-STD-461, RE 102. The purpose of the test is to ensure the motor terminal box is properly
sealed for electromagnetic interference. The motor is to be placed in the test chamber with any supporting
equipment, such as the variable speed drive, placed in the antechamber. The variable speed drive for the test can be
made by any commercial manufacturer, but shall be a single level pulse width modulated inverter. Cabling between
the variable speed drive and the motor shall be shielded and bonded according to best practice.
4.6.24 Electromagnetic interference test for motor thermal protection systems. The motor with a thermal
protection system installed shall undergo testing in accordance with MIL-STD-461. Testing may be performed with
the motor de-energized while monitoring the output of the controller. The thermal protection system shall consist of
the controller (monitor) and the required array of sensors. The motor with thermal protection system shall undergo
the following tests: RS 103, CS 101, CS 114, and CS 116.
4.7 Inspection of packaging. Samples packages and the inspection of the packaging (preservation, packing and
marking) for shipment, stowage and storage shall be in accordance with the requirements of section 5 and the
documents specified herein.
5. PACKAGING
5.1 Packaging. For acquisition purposes, the packaging requirements shall be as specified in the contract or
order (see 6.2). When packaging of materiel is to be performed by DoD or in-house contractor personnel, these
personnel need to contact the responsible packaging activity to ascertain packaging requirements. Packaging
requirements are maintained by the Inventory Control Point's packaging activities within the Military Service or
Defense Agency, or within the military service's system commands. Packaging data retrieval is available from the
managing Military Department's or Defense Agency's automated packaging files, CD-ROM products, or by
contacting the responsible packaging activity.
6. NOTES
(This section contains information of a general or explanatory nature that may be helpful, but is not mandatory.)
6.1 Intended use. AC, 60-hertz, integral-hp motors conforming to this specification are intended for use with
driven auxiliaries on board Naval ships.
6.2 Acquisition requirements. Acquisition documents must specify the following:
a.
Title, number, and date of this specification.
b.
Service (see 1.2).
c.
When first article inspection is required (see 3.1).
d.
Duplex bearing life calculation, if other than as specified (see 3.2).
e.
Voltage/frequency (see 3.5.1.2).
f.
Ambient operating temperature (see 3.5.1.3).
g.
Duty (see 3.5.1.6). If other than continuous duty, specify the following duty cycle as applicable:
h.
(1) Number of starts.
(2) Number of plug stops.
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