Abb Inc.

Abb Research Ltd.

Rafael Gutierrez

Robert C Ballard

Nathan T Sigman

Edgar A Wimmer, Jr

Sandeep Bala

Mohamed Y Haj-Maharsi

Le Tang

A hybrid transformer is provided that includes an electromagnetic transformer and an AC-AC converter with a DC bridge. The AC-AC converter is operable to keep the input voltage and current of the hybrid transformer substantially in phase and to reduce fluctuation in the output voltage of the hybrid transformer in the event of an increase or decrease in the input voltage.

Hybrid distribution transformer having a power electronic module for controlling input power factor and output voltage

Arc resistant enclosures for dry-type transformers. More particularly, transformer enclosures having one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums, and methods for providing same.

Method of providing arc-resistant dry type transformer enclosure

Arc-resistant dry type transformer enclosure having arc fault damper apparatus

Arc-resistant dry type transformer enclosure having arc channels

Methods of providing arc resistant switchgear enclosures for dry-type transformers are provided. The enclosures have one or more arc-resistant features, including arc channels, arc fault dampers, and arc fault plenums. In a preferred embodiment, the method comprises providing a base structure with a dry-type transformer seated thereon, providing walls and a roof, wherein at least the front wall contains at least one longitudinal seam covered by an arc channel.

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Wytheville, VA, United States of America

Rafael Gutierrez