LT31164 Primary View

Here is another custom transformer for one of our North Carolina Builders.

This unit is a 25KVA, Single Phase, 60HZ, Dry type transformer built on a set of Distributed Gap Cores.

LT31164 Secondary View

Primary Winding: 220/240V

Secondary Windings: 5000V@5.0A, 4000V Tap, CCS

Approximate Weight: 320#

Dimensions: 21″L x 14″ W x 16.5″ H

Please call for Pricing; ask for unit LT31164

LT31164 Top View

LT31160 Primary View

This is a 20KVA, Single Phase, 60Hz Transformer with a specified 110 degree C Heat rise.

Primary: 196, 204, 212, 220, 228, 236, 244V

Secondary: 110/220@91Amps

Weight Approx: 200 Lbs

Dimensions: 17″ L x 16.3″ H x 11.0″ D

LT31160 Top View

LT31160 Secondary View

LT31162 Primary

Well, we all now know that I won’t be giving up my day job any time soon to go into photography.

Here is our latest custom order, shipped today to one of our Gulf Coast friends.

This unit is a 36KVA, 60Hz, Single Phase CCS Transformer.

Primary: 220/240V

Secondary: 6000V@6.0A, 5500V, 5000V

This unit weighs about 410 pounds.  Dimensions are approximately 20″ L x 14″ W x 18.25″H

Call for pricing; ask for part number LT31162.

LT31162 Secondary

That is the catchphrase when discussing transformers.  But what does it realy mean?

Hypersil, a phrase coined at Westinghouse, simply means “grain-oriented Silicon Steel”.  The most typical and commonly seen form of this is a “cut core”.  The cores are made from silicon strip steel that is “wound” into an oblong, semi-rectangular shape.  Winding the strip steel in this fashion keeps the “grain” of the steel all going in the same direction.  The cores are then “cut” and the cut surfaces are highly polished so that they can be matched up again after being placed around the coil.  The cores must then be tightly banded to minimize (as much as possible) the “hum” often heard from transformers.  This “hum” is caused by the 2 smooth surfaces “vibrating” when power is run through the unit and is extremely difficult to prevent, even with banding and varnishing.  In addition, the entire process of manufacturing this type of core is both labor intensive and expensive.

Solution:  Distributed Gap (DG) Cores.

These are also grain-oriented Silicon Steel, but they are NOT wound and cut.  They are machined to have steps or gaps that allow the cores to be “woven” back together .  This prevents the smooth surface that allows for vibration.  These units are easier to work with, more economical and, above all, QUIET, which is what our transformers should be.

Cut Core

Distributed Gap Core (DG Core, Evans Core)

Please call for pricing.  Ask for Transformer LT31159.