Hi Dave.
According to the documents on the DoD ASSIST-Quick Search web site, there
are no longer any sections of MIL-T-27 that are active. They are all either
marked inactive or cancelled. Most are available for viewing if you want to
find out what tests the transformer was actually designed to pass.
http://astimage.daps.dla.mil/quicksearch/
At 06:50 AM 29/03/2001, you wrote:
Has anyone out there got any comments about the following:
I have been involved with the import, into the U.K, of an item of "off the
shelf" military equipment from the U.S.A. This avionics item operates from
3 phase 115v rms. I am told that the internal step down power transformer,
which as far as I am concerned is required to provide double insulation
primary to secondary, is only required to have 500v rms isolation, primary
to secondary. This attribute, it is said, is compliant to MIL-T-27.
There is always the perennial problem of matching military equipment
characteristics to modern safety specifications, particularly for existing
equipment, but 500v seems rather low, but then the MIL spec is current.
Does anyone have any comments or advice about this.
Dave Palmer
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