[Milsurplus] [Fwd: [Boatanchors] Boost-Buck Transformers now available]

[J. Forster]

---------------------------- Original Message ----------------------------
Subject: [Boatanchors] Boost-Buck Transformers now available
From:    "Robert Nickels" <ranickel at comcast.net>
Date:    Wed, April 18, 2012 6:56 pm
To:      "boatanchor network" <boatanchors at mailman.qth.net>
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The topic come up fairly regularly about how to deal with today's line
voltages that are  generally higher than our boatanchors were designed
for.     The usual suggestion is to wire up a filament transformer as a
bucking transformer, and that's what many of us have done.   But now
there's also a readily available commercial solution available through
Automationdirect.com, which has acquired a good reputation for
competitive pricing in the industrial control arena.   They now offer
NEMA-rated Buck-Boost transformers made by Jefferson Electric:

http://www.automationdirect.com/adc/Overview/Catalog/Power_Products_%28Electrical%29/Power_Transformers/Buck-Boost_Transformers_%28NEMA_Rated%29

Not only are these transformers new, agency-approved to meet applicable
standards and section 210.9 of the NEC, and attractively priced,  but
they're available in sizes that can handle an entire 20A branch
circuit.     For those interested, there are two good references at the
link above - a PDF file that provides detailed technical information on
buck-boost transformers, and an Excel worksheet that makes it easy to
select the right unit.

Any transformer can also be wired as an isolation transformer, or as a
conventional step-down or step-up transformer.  See the documentation
for wiring details.

Prices start at $53, and the 500VA model that would reduce a high line
voltage of 127 to 115 volts and capable of handling a complete 20A
branch circuit is $98.  This transformer could also be used in step-down
configuration to get 40A of 12 volts or 20A of 24VAC.

No connection to ADC except as a satisfied customer.

73, Bob W9RAN
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