Getting On Line - Komatsu 730E Operation & Maintenance Manual

OM3070
Operating Instructions

GETTING ON LINE

When operating a trolley truck, follow the procedure
listed below to get on the trolley line.
1. Approach the trolley line equipped portion of the
haul road at 7 to 10 mph to allow for smooth
transition into trolley assist propulsion. If speed
of the truck (in diesel mode) is below 6 mph, the
trolley system will not start the trolley sequence.
Increase speed and accelerate to 6 mph. Suffi-
cient distance must be allowed between trucks
to prevent overloading of the trolley line electri-
cal supply system and/or conductors and trucks
being rejected from the trolley line.
2. Align the truck with the entrance area of the trol-
ley line system when entering the overhead
cables for trolley. The operator should center
the truck with the cables as he enters the trolley
pick up area.
NOTE: The center of operation is approximately the
center of the truck. Centering or aiming the truck may
be accomplished by aligning the center of the
operator with the yellow navigational aid fitted on the
trolley cantilever arms. This aligning technique is to
be used for all operation on the trolley system.
3. Once aligned and moving 6 mph or faster, move
the master control lever forward to one of the
four speed control positions. This will start the
trolley sequence and the ready for trolley indica-
tor light should come on. The pantograph will
also raise to contact the overhead cables. After
the pantograph is in contact with the cables for
two seconds and the trolley sequence is com-
plete, the wheel motor power will switch from
the engine driven alternator to the overhead
power cables. The overhead indicator light for
on trolley should come on and the ready for trol-
ley should turn off. The trolley contactors will
pick up and the system will start a notching
sequence. Because of the higher voltage the
stepping (notching) is necessary to give a
smooth acceleration without exceeding the lim-
its of the wheel motors. This smooth conversion
from diesel to trolley is called blended transition.
This transition reduces the chances for wheel
motor flashovers,
mechanical shock to the motor housing frame,
gears, etc.
NOTE: The latch release on the master control lever
must be moved and held when moving the switch
into or out of the DIESEL position.
Operation - Section 30
Page 30-19
contactor arcing, and