Maeda MC405C-3 - ELECTRIC MOTOR OPERATION

Section 4 – ELECTRIC MOTOR OPERATION Mini-Crawler Crane M A E D A
4-134 1/2019 MC405C-3
ELECTRIC MOTOR
OPERATION
Pre-start Inspection
Pre-start Visible Checks
WARNING! For more information on checking
before starting engine (visible checks), see
"Pre-Start Visible Checks" on page 5-22.
As to the machine abiding by engine and
electric motor specifications, potential fire in
the machine may occur if a heap of flammable
materials and oil leak are present around the
hot sections such as the Inverter unit, power
supply box, and power unit.
Carefully check around these areas. Should
you find any abnormality, be sure to fix it or
contact us or our sales service agency.
Checking Before Starting Electric Motor
For more information on inspections before
starting the electric motor, see "Pre-Start
Inspection - Before Starting Engine" on page 5-
24. Perform the tasks other than those related to
the engine.
Checking After Starting Electric Motor
For more information on checking after starting
electric motor, see "Post-Start Inspection - After
Starting Engine" on page 5-31.
Connecting Power Supply Cable
WARNING! The following precautions should
always be observed. Potential serious
accident may occur if disregarded.
• Be sure to supply the machine
specifications-compliant power (AC 380,
400V) to this machine.
Power
supply
voltage (V)
Power
current (A)
Power supply
frequency (Hz)
380, 400
15
50
• A cabtyre cable must adhere to the
specifications of this machine (AC 380,
400V).
Motor
voltage (V)
Cable spec.
(sq)
Cable length
(m)
380, 400
3.5
20
5.5
40
• Always use a dry cabtyre cable.
Potential electric shock may occur if the
cabtyre cable terminal is wet or power
connection is performed with moisten
hands.
• Always turn OFF the main breakers of
power supply equipment and this machine
before connecting the cabtyre cable to this
machine.
• Keep the cabtyre cable free of flaws and
bend.
Be sure to replace a damaged cabtyre cable
with a new one.
• Ensure that no sharp protrusion is present
at an area where the cabtyre cable is routed.
Failure to follow the above precaution may
cause the cable to get snagged on the
protrusion and damaged or broken.
• To connect the cabtyre cable to the terminal
block in the power supply box, torque the
screw to the specified value. Potential fire
or electric shock may occur if the screw
comes loose that could develop a short
circuit.
• To connect the cabtyre cable to the terminal
block in the power supply box, tighten the
cable ground screw properly for the
prevention of water entry and cable
protection.
• The ground wire of the cabtyre cable must
be properly connected to the "PE terminal"
at the bottom of the terminal block in the
power supply box.
• Always close the power supply box door
completely after work, and attach the
Inverter unit cover properly.