25-Hz at Niagara Falls: end of an era on the Niagara Frontier, part I

摘要

AT 8:53 PM ON 12 OCTOBER 2006, a 66-kV circuit breaker tripped and locked out at the Harper Substation in Niagara Falls, New York, due to downed transmission conductors near Buffalo, New York. That event marked the end of over 111 years of 25-Hz alternating current (ac) electric power service on the American side of the Niagara Frontier.