Handbook of Magnetic Measurements

Magnetic Materials 137

improved properties: B

s

= 1.64 T and H

c

= 2.4 A/m (in the

case of Metglas 2605 SA1 H

c

= 3.4 A/m) (Hasegawa 2006).

Table 3.16 presents performance of a 50 Hz three-phase

500 kVA transformer and Figure 3.46 the efciency of

distribution transformer.

It was estimated that in the United States the

annual energy lost in transformer is around 140 TWh.

Introduction of AMDT transformers resulted in sav-

ing of around 80 TWh, which corresponds with annual

reduction of 60 tons of CO

2

* (Hasegawa and Azuma

2008). In 2009, ABB Corp. introduced production of

AMDT transformers in New Jersey.

Amorphous ma