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Pennsylvania Railroad E3b class
Type and origin
Power type Electric
Builder Baldwin-Lima-Hamilton
Serial number 75482, 75483
Build date November 1951
Total produced 2
AAR wheel arr. B-B-B
UIC class Bo'Bo'Bo'
Gauge 4 ft 8 12 in (1,435 mm) standard gauge
Electric system(s) 11 kV, 25 Hz AC
Current collection Pantograph (2 off)
Traction motors Westinghouse 370 (6 off)
Transmission AC current fed via a transformer tap changer through 12 Ignitron (Mercury arc) rectifier to DC traction motors.
Performance figures
Power output 3,000 hp (2,200 kW)
Operators Pennsylvania Railroad
Class E3b
Numbers 4995, 4996[1]
Scrapped 1964

Pennsylvania Railroad class E3b was an experimental electric locomotive supplied by Westinghouse Electric & Manufacturing Co.[1] The locomotive was of the two unit design, with each unit having a B-B-B (AAR) or Bo-Bo-Bo (UIC) wheel arrangement.[1] The bodywork and running gear was produced by Baldwin-Lima-Hamilton while the electrical equipment was provided by Westinghouse, who also acted as the main contractor.

In 1952 and 1953 the Pennsylvania Railroad took delivery of ten experimental locomotives, six from General Electric and four from Westinghouse. While GE's were all of the same class (E2b), the Westinghouse locomotives were split into two classes. Two locomotives had two three-axle trucks (E2c), while the other two had three two-axle trucks (E3b).

The locomotives were scrapped in 1964.


  1. ^ a b c Middleton (2002), p. 108.