In An Industry Which Has Been Dominated By An Exclusive Group Of Meter Manufacturers The Astra Transformers Have Earned Growing Acceptance By Electric Utilities And A Steady Growth In Volume. Customer Recognition Has Been Hastened By These Astra Innovations:
First to Introduce 3 1/16" windows in the Intermediate Window Current Transformer. This is now the industry standard.
First with RF 4.0 continuous current thermal rating for 400:5 ampere Intermediate Current Transformers. This is now the industry standard.
First to offer interchangeable removable bus bars in Intermediate Current Transformers up through 4000:5 ampere ratings.
First with 0.3% accuracy at Burden 0.5 for the 200:5 ampere Intermediate Window Current Transformer. This is now the industry standard.
First with Burden/Accuracy information on nameplates of Instrument Transformers. This is now the industry standard.
First with front connection Secondary Terminals on Pad-Mount Current Transformers.
Exclusive Patented shorting switch and cap which permits shorting of Current Transformer Secondary without the use of tools or exposing installer to energized circuit elements.
