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GN Electric Operations continued
EMERGENCY OPERATION
BRAKING
Arm. Amps. 1050
Field Amps. 1050
Time 10 min.
Arm. Amps. 500
Field Amps. 500
Time 30 min.
MOTORING
Arm. Amps. 1050
Field Amps. 525 - 1050
Time 10 min.
Arm. Amps. 500
Field Amps. 250 - 500
Time 30 min.
4. With Traction Motor Blowers 1BB or 2BB Shut Down
a. Ventilation is removed from
— M3, M4, M5 and M6 motors or M7, M8, M9 and
M10 motors.
b. Method of Operation
— Traction motors must be operated in accordance
with the instructions outlined in Item 3.
C. OPERATING WITH GENERATORS CUT OUT
1. With One Pair of Generators Cut Out
— The remaining pair may be operated in either the
high or low speed connection.
— Cut out any three pair of traction motors in order
to prevent overloading the remaining generators.
If possible, one of the remaining pair of motors
should be on the No. 2 end of the locomotive.
Otherwise, it will not be possible to establish the separate
excitation connection.
D. OPERATING WITH TRANSFORMER PUMP
MOTOR CUT OUT
1. Reduce Transformer Loading to Half Value By
— Shutting down one MG set or
— Reducing synchronous motor loading to 850
amperes. Observe transformer temperature meter,
limiting temperature rise to indicated safe values by
further reduction in load if necessary.
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EMERGENCY OPERATION
E. OPERATING WITH ONE MOTOR ALTERNATOR
SET SHUT DOWN
1. Loading on equipment whose blower motors are
powered by the MA set shut down must be guided by
the instructions "A" and "B" above.
2. It is not possible to start an M-G set with one
MA set supplying power.
F. OPERATING WITH GROUNDED EQUIPMENT
1. A ground in the 25 cycle A. C. circuits will cause
the pantograph relay to operate. This can be
prevented by opening TGCO and nullifying the ground
element of the relay. However, it is not recommended
as no further ground protection will be provided by
the relay and a second ground will cause a serious
short circuit. When TGCO is operated, the locomotive
should be shopped at the end of the run, the trouble
corrected, and TGCO closed.
2. Only a ground indicator is provided in the main
excitation circuits. When a ground is indicated in these
circuits, the trouble should be corrected at the end of
the trip.
3. A ground relay cut-out switch is provided in the
main propulsion circuits. When a ground occurs in
these circuits power on the traction motors will be
lost and before restoring power, GRCO will have to be
opened. The ground should be cleared at the end of
the trip.
4. A ground relay is provided for each of the two 126
cycle blower systems. Upon the occurrence of a ground
in a blower system, the blowers on that system will be
shut down. If a defective blower can be found it
should be isolated but in any event the locomotive
must be operated in accordance with instructions
under Item B.
Page 106
TROUBLE SHOOTING. 5018-5019
DEAD CAB SEQUENCES
To determine proper sequence of events for the proper
operation of Battery charging, M. G. set operation and
Controller operation.
Sequences A, B, C, D are all made without power on
the locomotive.
Sequence A and B may be run independently of each
other, or may be run first Sequence A and with A setup
run Sequence B. This gives a complete starting cycle
of the AC side of the locomotive.
Sequence C and D may be run following Sequence B,
or may be run alone.
PRELIMINARY SETUP FOR ALL SEQUENCES
(1) Close Battery Switch.
(2) Pump up air or supply reservoirs from outside
source.
(3) Pantographs down and ground switches closed.
(4) On bulkhead No. 2 Control Compartment close MG
set control and Aux. Control Breakers.
SEQUENCE (A). BATTERY CHARGING — MOTOR
ALTERNATOR CONTROL.
(1) Open starting generator cut outs SG 1 CO and SG 2 CO.
(2) Jumper from wire U 46 on MA 1 Interlock to wire
W 46 on MA 21 Interlock.
(3) At starting station close No. 1 MA and No. 2 MA
buttons.
(4) Switches closed MA 1 — MA 2 — MA 21 — MA 22— MA S1
— MA S21 (Normally with power on MA S1 — MA S21
open when Motor Alternator sets are up
to speed cutting out the starting winding) BR 1 — GS 4
— BC 1.
(5) Operate RCR by hand — close BC 2.
(6) BC 2 in opens BR 1 (BR 1 is closed when not
charging batteries to cut out charging resistor BR. When
charging batteries resistor is in series with battery.)
SEQUENCE (B) MOTOR GENERATOR STARTING.
This sequence may be run with or without sequence
(A). If run without Sequence A, the operation of BR 1,
Page 107
BC 1, BC 2, GS 3, and GS 4 are not made. Primarily
the battery charging circuit does not affect the MG
starting — However the MG starting affects the battery
charging. The complete MG starting sequence
including the effect on the battery charging circuit follows.
As stated above, if Sequence B is run without Sequence
A, overlook the operation of BR 1, BC 1, BC 2, GS 3
and GS 4, in the following sequence.
Switch numbers and contactors for No. 2 MG set
given in parenthesis.
(1) Insert paper in contacts of MGR 12 (MGR 22) to
avoid overheating of SR 1 (SR 21) DC Coil.
(2) Place wedge on armature of SR 1 (SR 21) to hold
relay closed.
(3) Press No. 1 (No. 2) MG start button.
Switches closed: GS 1 (GS 21), GS 2 (GS 22), MGR
11 (MGR 21).
Relays closed: TDR 1 (TDR 21) TDR 2 (TDR 22)
SR 1 (SR 21). MGR 11 (MGR 21) in opens GS 4
Battery charging field switch GS 1 (GS 21) GS 2
(GS 22) closed opens BC 1 — BC 2 and closes GS 3 —
Full field for starting generators. BC 2 out closes
BR 1 — shunting out charging resistor (Opening GS
4 BC 1 — BC 2 and closing BR 1 and GS 2 disconnects
battery charging and applies full field to
starting generators for starting main MG sets).
If power were on the MG set would start and run
up to 462 RPM on the main generators as starting
motors.
If sequence (B) run without Sequence (A):
Switches closed: GS 1 (GS 21), GS 2 (GS 22), MGR
11 (MGR 21).
Relays closed: TDR 1 (TDR 21), TDR 2 (TDR 22),
SR 1 (SR 21). If Sequence (B) run in conjunction
with Sequence (A).
Switches closed: GS 1 (GS 21), GS 2 (GS 22), MGR
11 (MGR 21) GS 3 and BR 1.
Switches open: BC 1 — BC 2 — GS 4.
Relays closed: TDR 1 (TDR 21), TDR 2 (TDR 22),
SR 1 (SR 21).
(4) Jumper the SS 1 (SS 21) speed switch. ("Place
jumper from G 44 (G 45) to S 44 (S 45) on SF1 (SF 21)
interlocks. These wires are the lower fingers 2nd
and 3rd from the left hand side of interlock on the
"Off" contactor).
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