Class 47.7 (Delfin) | TrainsDepot.org

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Class 47.7 "Delfin"

UIC / EVN numbering: 91 53 0 477

Vehicle type: Electric locomotive

Registration country: Romania

Railway companies: SNTFC - Societatea Naţională de Transport Feroviar de Călători (CFR Călători)

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In service:

from 2007

Built by:

SOFTRONIC Craiova

Gauge:

Standard gauge (1'435 mm)

Wheel arrangement:

Co'Co'

Electric systems:

15 kV AC / 16,7 Hz

Current collectors:

Pantograph - Asymmetrical

Length over buffers (mm):

19'800 mm

Width (mm):

3'000 mm

Height (mm | over lowered pantograph):

4'500 mm

Wheelbase (mm | rigid / total):

10'300 mm

Tare weight (t):

120 t

Axle load (t):

20 t

Power output (x'xxx kW / x'xxx hp):

7'000 kW
9'400 hp

Bogie wheelbase (mm):

4'350 mm

Wheel diameter (x'xxx,xx | mm | new / worn):

1'250 mm

Maximum speed (km/h):

160 km/h

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Vehicle's history

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2007

The Class 47.7 is a modernized version of the well-known Romanian 060-EA electric locomotive family, developed to extend the service life of these locomotives and adapt them to the requirements of modern passenger operation.

During the second half of the 2000s, several modernization programmes were developed for the large fleet of Class 40 and Class 41 locomotives inherited from the former CFR. While some of these programmes were primarily intended for freight operation, CFR Călători turned to SOFTRONIC Craiova.

The first Class 47.7 locomotives appeared in 2007. Instead of replacing the complete locomotive, SOFTRONIC retained the proven six-axle Co’Co’ platform while extensively modernizing its electrical and control equipment. The locomotives received electronic traction control using IGBT technology, together with the ICOL-TSAM control and monitoring system, replacing much of the original electromechanical equipment of the 060-EA design.

The modernization also introduced computerized control of the locomotive and improved regulation of the traction motors. At the same time, the driver’s cab and operating equipment were adapted to the new systems, while changes to the body and front ends gave the locomotives the distinctive appearance that led to their popular nickname “Delfin” (“Dolphin”).

The Class 47.7 was intended for passenger operation at speeds of up to 160 km/h. This distinguished it from the closely related Class 47.6, represented at CFR Călători by locomotive 692, which is limited to 120 km/h.

Provision was also made for operation beyond Romania. The Class 47.7 locomotives were equipped for operation on the Hungarian railway network, including the necessary train-protection equipment. This made them suitable for international passenger services between Romania and Hungary.

The first locomotive of the series was 477 773, modernized in 2007 and allocated to Brașov. It was followed by 477 753, also based at Brașov, while subsequent locomotives were distributed between several CFR Călători depots, notably Brașov, București Călători and Arad.

The modernization programme continued over the following years and eventually produced a fleet of 28 Class 47.7 locomotives. Although most were derived from locomotives previously classified in the Class 40 and Class 41 series, their previous classification did not necessarily determine their new number, as bogies, wheelsets and transmission components could be exchanged during their careers and modernization.

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