SAR/SAS 7E3 Locomotive White metal and Enamel Tie Clip
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South African Class 7E3
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Builders’ plate, no. E7252
The South African Class 7E3, Series 1 of 1983 is a South African electric locomotive from the South African Railways era.
Between 1983 and 1984 the South African Railways placed sixty Class 7E3, Series 1 electric locomotives with a Co-Co wheel arrangement in mainline service. Beginning in 2001, sixteen of these dual cab locomotives were rebuilt to single cab locomotives and reclassified to Class 7E4.
Manufacturers
The 25 kV AC Class 7E3, Series 1 electric locomotive was designed for the South African Railways (SAR) by Hitachi and built in South Africa by Dorbyl, who also supplied the mechanical components. Sixty locomotives were delivered by Dorbyl between 1983 and 1984, numbered in the range from E7216 to E7275.
Features
On the Class 7E3, Series 1, control of traction and rheostatic braking is by stepless solid-state electronics. The electrical equipment was designed for high power factor operation, obtained by the switching in of power-factor correction capacitors.
Unlike the Classes 7E and 7E2 Series 1 and 2 where thyristors are used, these locomotives feature silicon-diode rectifiers.
These dual cab locomotives have a roof access ladder on one side only, just to the right of the cab access door. The roof access ladder end is marked as the number 1 end. Series 1 and Series 2 locomotives are visually indistinguishable from each other, but the two sides of the locomotives are sufficiently different in appearance that a pair of them coupled at the same end appears at first glance to be two different locomotive types. The roof access ladder side is smooth, while the other side has several large grilles.
MORE INFO ON 10E: http://en.wikipedia.org/wiki/South_African_Class_7E3,_Series_1
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