description SJ Rc Class (Sweden) Overview
An electric locomotive family introduced in 1967 for Swedish State Railways, designed by ASEA with thyristor control technology that influenced subsequent locomotive designs worldwide.
insights Why this score
SJ Rc Class (Sweden) ranks #68 of 248 in the Locomotive ranking, behind Nickel Plate Road S-Class Berkshire, ahead of LMS Black Five.
balance SJ Rc Class (Sweden) Pros & Cons
- Influential thyristor control technology
- Reliable ASEA engineering
- Widely adopted in Scandinavia
- Versatile operating capability
- Aging 1960s design
- Gradually being replaced
help SJ Rc Class (Sweden) FAQ
Why was the Swedish Rc locomotive's thyristor control important?
Thyristor electronics allowed smoother and more efficient control of traction-motor power than older tap-changer systems. ASEA's technology, introduced on the Rc family in 1967, influenced later electric locomotives in several countries.
How is the SJ Rc related to Amtrak's AEM-7?
Amtrak's AEM-7 was developed from ASEA technology demonstrated by the Swedish Rc design. The American locomotive was adapted for the Northeast Corridor rather than being a direct, unchanged copy.
What kinds of trains have Rc locomotives hauled in Sweden?
Members of the family have worked both passenger and freight services for Swedish State Railways and successor operators. Different subclasses were optimized for duties such as higher-speed passenger running or heavy freight.
Why do Rc locomotives have several subclass numbers?
The Rc family evolved through versions such as Rc1, Rc2, Rc3, Rc4, Rc5, and Rc6. These variants reflect changes in gearing, electronics, permitted speed, and later rebuilding programs.
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