Kelly&Kelly wrote: ↑Fri Feb 14, 2020 9:47 pm The substation contained two rotary converters and the world's biggest battery. It was not for rolling stock repairs, though it had a siding for power equipment where the mobile temporary substation car was often kept.Are you referring to the portable substations?: http://www.trainsarefun.com/lirr/lirrmo ... ubstations