| South African Classes 1E and 1ES |
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Class 1ES no. E145 at Salt River, January 1975 |
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| Specifications |
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Configuration:
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| • AAR | B-B |
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| • UIC | Bo+Bo |
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| • Commonwealth | Bo+Bo |
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| Gauge | 3 ft 6 in (1,067 mm) Cape gauge |
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| Wheel diameter | 1,219 mm (48 in) |
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| Minimum curve | 91.45 m (300 ft) |
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| Wheelbase | 9,423 mm (30 ft 11 in) |
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| • Bogie | 2,819 mm (9 ft 3 in) |
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| Pivot centres | 6,604 mm (21 ft 8 in) |
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| Panto shoes | 8,039 mm (26 ft 4+1⁄2 in) |
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Length:
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| • Over couplers | 13,310 mm (43 ft 8 in) |
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| • Over beams | 12,395 mm (40 ft 8 in) |
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| Width | 2,800 mm (9 ft 2+1⁄4 in) |
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Height:
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| • Pantograph | 3,962 mm (13 ft 0 in) |
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| • Body height | 3,480 mm (11 ft 5 in) |
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| Axle load | 17,018.75 kg (37,519.9 lb) |
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| Adhesive weight | 68,075 kg (150,080 lb) |
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| Loco weight | 68,075 kg (150,080 lb) |
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| Electric system/s | 3 kV DC catenary |
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| Current pickup(s) | Pantographs |
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| Traction motors | Four MV 182R |
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| • Rating 1 hour | 224 kW (300 hp) |
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| Gear ratio | 17:75 |
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| MU working | 4 maximum |
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| Loco brake | Air, Rheostatic & Regenerative |
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| Train brakes | Air & Vacuum |
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| Couplers | Johnston link-and-pin
AAR knuckle (1930s) |
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| Performance figures |
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| Maximum speed | 72 km/h (45 mph) |
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Power output:
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| • 1 hour | 896 kW (1,202 hp) |
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Tractive effort:
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| • Starting | 176 kN (40,000 lbf) |
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| • 1 hour | 94 kN (21,000 lbf) |
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| • Continuous | 73 kN (16,000 lbf) |
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| Career |
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| Operators | South African Railways |
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| Class | Class 1E, Class 1ES |
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| Number in class | 172 |
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| Numbers | E1-E95, E98-E122, E139-E190 |
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| Delivered | 1925–1945 |
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| First run | 1925 |
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| Withdrawn | c. 1990 |
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The South African Railways Class 1E of 1925 was an electric locomotive.
Between 1925 and 1945, the South African Railways purchased 172 Class 1E electric locomotives, spread over seven orders. They were the first mainline electric locomotives to be introduced in South Africa.
