Metro-North’s train service in Connecticut is challenging because of a technological quirk of fate: ours is the only commuter railroad in the U.S. that operates on three modes of power… AC, DC and ...

Batteries aren't one-size-fits-all, and neither is the way they're wired to your house. Here's what you should know about AC- and DC-coupling. When we think about solar panels and batteries, we don't ...

Famously, Nikola Tesla won the War of the Currents in the early days of electrification because his AC system could use transformers to minimize losses for long distance circuits. That was well before ...

Alternating current (AC) electrical power has been used in industrial facilities and in people’s homes since 1882. Over the years, we have come to recognize the hazards associated with AC, and safety ...

Compact 3 kW programmable AC-DC power supplies gain a new wide-range three-phase input variant that widens voltage ...

At the 1893 Chicago World’s Fair—held in celebration of the 400th anniversary of Columbus' discovery of the American continent—as U.S. President Cleveland pressed a button, 250,000 light bulbs lit up ...