|Type and origin|
|Builder||General Motors Diesel|
|Serial number||A1945–A1949, A2176, A2558–A2560|
|Build date||1963 (5), 1968 (1), 1971 (3)|
|AAR wheel arr.||B-B|
|Electric system(s)||2400 V AC 60 Hz catenary|
|Operator(s)||Iron Ore Company of Canada|
The EMD SW1200MG was a 4-axle electric locomotive built by General Motors Diesel between 1963 and 1971. This locomotive was the electric version of the diesel powered SW1200, with the prime mover replaced by a motor-generator set, hence the MG suffix in the model number.
Locomotives run under 2400V 60 Hz, in automatic control without driver. The difference with SW1200 is that a single-phase electric motor is provided in place of the diesel motor, with adapted control.
Nine examples of this locomotive were built for a single Canadian customer – Iron Ore Company of Canada (IOC).
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