Pennsylvania Railroad E3b electric locomotive No. 4995.

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A Westinghouse advertisement, ca. 1953.
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Pennsylvania Railroad E3b electric locomotive No. 4995.
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A Westinghouse advertisement featuring PRR E3b No. 4996, ca. 1953.

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Pennsylvania Railroad E3b Class Electric Locomotive
The Pennsylvania Railroad class E3b was an experimental electric locomotive supplied by Westinghouse Electric & Manufacturing Co. The locomotive was of the two unit design, with each unit having a B-B-B (AAR) or Bo-Bo-Bo (UIC) wheel arrangement. 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.

Pennsylvania Railroad E3b Class Overview
Type and origin
Power type: Electric
Builder: Westinghouse, Baldwin-Lima-Hamilton
Serial numbers: 75482, 75483
Build date: November 1951
Total produced: 2
Specifications
AAR wheel arrangement: B-B-B
UIC class: Bo'Bo'Bo'
Gauge: 4 ft 8 1⁄2 in (1,435 mm) standard gauge
Electric systems: 11 kV, 25 Hz AC
Current collection: Pantograph (2 x)
Traction motors: Westinghouse 370 (6 x)
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)
Career
Operator: Pennsylvania Railroad
Class: E3b
Numbers: 4995, 4996
Disposition: Scrapped 1964

See also:

Electric Locomotives

Pennsylvania Railroad

Locomotives