South African Class 8E

This article is about the South African electric locomotive. For the steam locomotive, see South African Class 8E 4-8-0.

South African Class 8E

300px No. E8002 at Mandini Station, KwaZulu-Natal, 13 August 2007

Type and origin Power type Electric Designer BBC-Siemens Builder Union Carriage and Wagon Serial number Industrials 449143-449149 Model BBC-Siemens 8E Build date 1983-1985 Total produced 107

Specifications AAR wheel arr B-B UIC class Bo'Bo' Gauge 3 ft 6 in (1,067 mm) Cape gauge Wheel diameter 1,220 mm (48.0 in) Wheelbase 11,130 mm (36 ft 6.2 in)  • Bogie 3,280 mm (10 ft 9.1 in) Length:  • Over couplers 16,120 mm (52 ft 10.6 in)  • Body 15,260 mm (50 ft 0.8 in)  • Pivot centres 7,850 mm (25 ft 9.1 in) Width 3,040 mm (9 ft 11.7 in) Height 2,995 mm (9 ft 9.9 in) hoods  • Pantograph 4,140 mm (13 ft 7.0 in)  • Body height 3,680 mm (12 ft 0.9 in) Axle load 21,171 kg (46,674 lb) (E8001-E8018) 20,960 kg (46,210 lb) (E8019-E8100) Adhesive weight 82,000 kg (181,000 lb) (E8001-E8018) 81,200 kg (179,000 lb) (E8019-E8100) Loco weight 82,000 kg (181,000 lb) (E8001-E8018) 81,200 kg (179,000 lb) (E8019-E8100) Power supply Catenary Current collection Pantograph Traction motors Four IKB2820-OTA-02  • Rating 1 hour 200 kW (270 hp)  • Continuous 176 kW (236 hp) Gear ratio 17:115 Loco brake Air Train brakes Air & Vacuum Couplers AAR knuckle

Performance figures Maximum speed 75 km/h (47 mph) Power output:  • 1 hour 800 kW (1,100 hp)  • Continuous 704 kW (944 hp) Tractive effort:  • Starting 287.6 kN (64,700 lbf)  • 1 hour 177.3 kN (39,900 lbf)  • Continuous 145.3 kN (32,700 lbf) @ 17 km/h (11 mph)

Career Operators South African Railways Spoornet Transnet Freight Rail Driefontein Gold Mine Impala Platinum Class Class 8E Power class 3 kV DC Number in class 107 Numbers SAR E8001-E8100 Dries 5-7 Implats 11-12, 14-15 Nicknames Cockroach Delivered 1983-1985 First run 1983

The South African Railways Class 8E of 1983 is an electric locomotive.

Between 1983 and 1985, the South African Railways placed one hundred Class 8E centre-cab electric locomotives with a Bo-Bo wheel arrangement in shunting service. Seven more were built for the mining industry.

Manufacturer

As a result of the gradual withdrawal of steam locomotives from service, many of which had been employed as shunting engines, and in addition to the Classes 36-000 and 36-200 diesel-electric locomotives, a growing need arose for a modern electric shunting locomotive for the South African Railways (SAR), especially for use in yards in the large 3 kV DC electrified centres, where the Class ES and Class 1ES locomotives were also due to be withdrawn.

File:Plate BBC 8E (E8032).JPG

The Class 8E electric shunting locomo­tive was designed for the SAR by a consortium consisting of Brown Boveri of Switzerland and Siemens of Germany. It was built by Union Carriage and Wagon (UCW) in Nigel, Transvaal, who also fabricated the mechanical components.

One hundred locomotives were delivered by UCW between 1983 and 1985, numbered in the range from E8001 to E8100. Another seven locomotives were built by UCW for the mining industry. UCW did not allocate builder’s numbers to the locomotives it built for the SAR, but used the SAR unit numbers for their record keeping. The locomotives which were built by UCW for industry, on the other hand, were allocated works numbers.

Orientation and features

File:Class 8E E8008 no. 1 end a.JPG

No. 1 end

File:Class 8E E8008 no. 2 end b.JPG

No. 2 end

The centre cab Class 8E has large grilles on the sides of both hoods on one side, and a grille on the side of only the left hand hood, when viewed from the other side. The no. 1 end will be at the viewer's left when observing the locomotive from the side with grilles on both hoods.

The pictures alongside, of no. E8008 with both hood covers removed, illustrate the different equipment installed inside the two ends of the locomotive.

The locomotive has solid state electrical control circuitry, with a thyristor controlled chopper supply­ing the four traction motors. Since the conventional accelerating resistors which are used on mainline electric locomotives, could be omitted, considerable energy saving was accomplished on heavy shunting duties.

The bogies are based on those of the Class 6E, but with a rubber secondary suspension system, which provides maximum adhesive force to the locomotive when starting from rest. The locomotive was designed to be operated by a crew of one and has two driving stations in the cab.

Service

File:Class 8E E8066 IDR.JPG

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The Class 8E was initially placed in service on the Witwatersrand, but a large number of them were later allocated to Durban and to other locations in Natal. Some are also employed at Beaconsfield in Kimberley, at Postmasburg in the Northern Cape and at Nelspruit in Mpumalanga. Apart from a short period in the early 1980s, when one served as the station pilot in Cape Town, working between the mainline platforms at Cape Town station and the passenger carriage yard at Culemborg, the Class 8E is unknown in the Western Cape.

They are powerful shunters and popular with their drivers, even though problems are sometimes experienced with start-up or failures, while working at coastal centres such as at Umbilo in Durban. This is attributed to the damp climate, which causes start-up contacter failures. Beginning in 2007, they were gradually equipped with air conditioning units, similar to those installed in the Class 18E, for added crew comfort. The air conditioning unit is mounted on the running board to the right of the cab on the right side of the locomotive.

Industrial use

At the same time that the Class 8E locomotives were being built for the SAR, another seven were built for the mining industry.

• Three were built for Driefontein Consolidated Gold Mine (Dries) near Carletonville, numbered in the range from 5 to 7 and with builder’s works numbers in the range from 449145 to 449147. Of these, Dries no. 5 was withdrawn and scrapped after an accident, with the remains dumped at the mine.
• Four were built for the Impala Platinum mine (Implats) at Phokeng near Rustenburg, numbered 11, 12, 14 and 15, with builder’s works numbers 449143, 449144, 449148 and 449149. In addition to these, seven SAR Class 8E locomotives, numbers E8005, E8006, E8019, E8026, E8042, E8050 and E8060, were later sold to Implats.

Illustration

The main picture shows numbers E8002 and E8007 at Mandini Station on 13 August 2007. Liveries which were applied to Class 8E locomotives are illustrated below.

• SAR Class 8E E8062.JPG

  No. E8062 in SAR Gulf Red and whiskers livery at Beaconsfield, Kimberley, 17 September 2009

• SAR Class 8E E8001.JPG

  No. E8001 in Spoornet maroon livery at the Sentrarand loco depot in Gauteng, 8 October 2009

• SAR Class 8E E8004.JPG

  No. E8004 in Spoornet blue livery with solid numbers at the Sentrarand depot in Gauteng, 22 September 2009

• SAR Class 8E E8013.JPG

  No. E8013 in Spoornet blue livery with outline numbers at Capital Park, Pretoria, 1 October 2009