 
GN Electric Operations continued
DESCRIPTION
MAJOR POWER COMPONENTS OF THE
LOCOMOTIVE
1. TRANSFORMER
Type — FOAP, FormA
Rating — 25 Cycles, 4969 KVA, 11000—1350 Volts,
Pyranol Filled, Forced Air Cooled
Function
Power from the 25 Cycle 11,000 Volt trolley wire is
transmitted by pantograph and cables to the
transformer primary. The secondary provides 1350 volts
for the synchronous motors and intermediate taps
provide power for the auxiliaries.
2. MOTOR GENERATOR SETS
Two sets are installed in each locomotive and each
is composed of a synchronous motor, and two traction
generators with exciters.
The rating and function of each unit comprising
these sets are as follows:
A. SYNCHRONOUS MOTORS (ASI1, ASI2)
Type — ASI, Form — HL
Rating — 4 pole, 3000 HP, 2490 KVA, 750 RPM,
1350 Volts, Single Phase, 25 Cycles, 1.0 P.F.
Function
To act as motors and drive the generators when
motoring or as generators which are driven by the
traction motors when regenerating.
B. TRACTION GENERATORS
Model No. 5GT574A1 (GIB, G2B), CCW Rotation
Model No. 5GT575A1 (G1A, G2A), CW Rotation
Rating — 12 pole, 1500 HP, 750 RPM, 700/450
Volts, 1500/2300 Amperes, Direct Current
Function
To supply power to traction motors when motoring,
or when regenerating, to receive power from
the traction motors and drive the synchronous
motor.
Page 81
DESCRIPTION
C. REGENERATIVE EXCITERS (RE1, RE2)
Model No. 5GTB574A1, CCW Rotation
Rating — 16 Pole, 80 KW, 750 RPM, 25 Volts, 3200
Amperes, Direct Current
Function
To excite the traction motor fields while
regenerating or control the motor field while motoring
with weak field in separate excitation.
D. MAIN EXCITERS (El, E2)
Model No. 5GTB575A1, CW Rotation
Rating — 6 Pole, 31.5 KW, 750 RPM, 45 Volts, 700
Amperes, Direct Current
Function
To provide excitation for the synchronous motors,
traction generators, regenerative exciters and their
own fields.
3. TRACTION MOTORS (M1 thru M12)
Model No. 5GE746A2
Rating — 4 Pole, Commutating Pole, Series Wound, 420
HP, 1050 Amperes, 2300 CFM, Direct Current
Function
To act as motors supplying traction when motoring,
or as generators when regenerating.
4. COMPRESSORS (Cl, C2)
Model No. 7CPA39A1
Motor Rating — 6 Pole, 38 HP, 1170 RPM, 150 Volts,
240 Amperes, Forced Ventilation, Single Phase, 25
Cycles
Compressor Rating — 150 CFM Displacement, 135 PSI
Operating Pressure
Function
To provide air for air brakes and control.
5. MOTORALTERNATOR SETS (MA1, MA2)
Model No. 5GDY28A1
One each of these forced ventilated sets are located
in each nose compartment. The rating and function
of each unit in each set is as follows:
Page 82
DESCRIPTION
A. INDUCTION MOTORS (ACM1, ACM2)
Model No. 5K6326DC1
Rating — 2 Pole, 85 HP, 1476 RPM, 235 Volts, 335
Amperes, Single Phase, 25 Cycles
Function
To drive the alternators (A1, A2) and dc generators
(SG1, SG2)
B. ALTERNATORS (A1, A2)
Type — ATB, Form — BL, Frame No. 953Y
Rating — 10 Pole, 62.5 KVA, 0.8 PF, 1476 RPM,
275 Volts, 131 Amperes, 123 Cycles, 3
Phase
Function
To supply power for the blower units.
C. DC GENERATORS (SG1, SG2)
Model No. 5GY30A1
Rating — 6 Pole, 7.5 KW, 1476 RPM, 75 V, 100 Amp.
Function
To provide power for control, lighting, battery
charging, excitation for alternators or starting main
sets.
6. TRACTION MOTOR BLOWERS (1AB, 1BB, 2AB,
2BB)
Model No. 5GYA4A1
Motor Rating — K3641. 4 Pole, 26 HP, 3630 RPM, 275
Volts, 56 Amperes, 123 Cycles, 3 Phase
Blower Rating — 10,000 CFM at 9 in. water S. P.
Function
To ventilate traction motors, aux. motors and
control.
TRANSFORMER BLOWERS (1TB, 2TB)
Model No. 5GYA5A1
Motor Rating — K3531, 4 Pole, 7.5 HP, 3610 RPM,
275 Volts, 16 Amperes, 123 Cycles, Single Phase
Blower Rating — 4,500 CFM at 6 in. water S. P.
Function
To ventilate transformer.
Page 83
Operator's Cab  Plate A120413
Page 84
