MNRR upgrading NH line 60 HZ

Trains Magazine Transit
1

Cos cob is getting new transformers. Wonder if old ones were 25 Hz of old system ( which might have worked or 60 Hz ) . It may be that old ones did not have enough capacity ? Most transformers have a very long in service life. Just one more item that shows MNRR is open and trying to stay ahead of any past or future problems.

http://www.governor.ct.gov/malloy/cwp/view.asp?A=4010&Q=539158

2

The 25Hz transformers were removed when the line was converted to 60Hz approximately 32 years ago. Advances in metalugy and insulation material over those 32 years permit transformers of a specific given size to handle about 50% more power.