Automatic line sectionalizer
A self-contained circuit-opening device that automatically opens the main electrical circuit after sensing and responding to a predetermined number of successive main current impulses.
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ATP
Alternative Transient Program
ATC
Available Transfer Capacity
ASTM
American Society for Testing and Materials. ASTM is located at 1916 Race Street, Philadelphia, PA 19103.
Askeral
A generic term for a group of synthetic, fire-resistant, chlorinated aromatic hydrocarbons used as electrical insulated fluids.