Mr. Nasadowski wrote:
The main transformers were single winding (not unlike the ALP-46). They tended to trip the substations due to their low impeadance. Pan ups were restricted in places, and I'd imagine they had trouble at power gaps too....I recall that the employee timetable at that time had a warning about operating more than 6 metroliner cars as a set because of "possible catenary outages" !!
The single winding was designed for 11kv and 25kv, 25hz and 60hz. GE had a tap switch here.Oh my God! I didn't suppose that anyone was even thinking about 25kv or 60hz operation in the mid-60's, let alone designing it in to the metroliners! Just think; if any of these units survived, we could still run them today, even to Boston!