CP Class 2550

Série 2550 were the second batch of 25 kV electric locomotives built for Portuguese Railways (CP). They entered service in 1964 and were used on the main line between Lisbon and Oporto. 20 locomotives were built; as of 2012 none remain in service.[1] Unlike the earlier Série 2500, the Série 2550 were built with unpainted stainless steel bodywork. They were constructed by Sorefame, with components from the French company Alsthom.

CP Class 2550
Two Série 2550 locomotives hauling a freight train
Type and origin Power type Electric Builder Groupement d'Étude d'Électrification Monophasé 50Hz Henschel Alstom Sorefame Build date 1963-1964 Total produced 20
Specifications Configuration: ​  • Whyte Bo-Bo  • UIC Bo′Bo′ Gauge 1,668 mm (5 ft 5+21⁄32 in) Iberian gauge Wheel diameter 1,300 mm (51 in) Length 15.38 m (50 ft 5.5 in) Width 3.00 m (9 ft 10.1 in) Height 4.45 m (14 ft 7.2 in) Loco weight 72.0 t (70.9 long tons; 79.4 short tons) Electric system/s 25 kV 50 Hz AC Catenary Current pickup(s) Pantograph Traction motors 709 hp (529 kW) Alstom TAO-645 A1, 4 off Train heating None Loco brake Air Train brakes Air Safety systems Convel
Performance figures Maximum speed 120 km/h (75 mph) Power output 2,790 hp (2,080 kW) Tractive effort 191 kN (43,000 lbf)
Career Operators Comboios de Portugal Numbers 2551-2570 Retired 2009 Disposition One preserved, remainder scrapped

The Série 4700 were built in 2007-2009 as a replacement for the Série 2550.