
B-65272EN/04 SAFETY PRECAUTIONS
s-3
1.2 WARNING
WARNING
- Be safely dressed when handling a motor.
Wear safety shoes or gloves when handling a motor as you may get
hurt on any edge or protrusion on it or electric shocks.
- Use a crane or lift to move a motor from one place to another.
A motor is heavy. If you lift the motor by hand, you may get a
backache, or you may be seriously injured when you drop the motor.
A suitable crane or lift must be used to move the motor. (For the
weight of motors, refer to this manual.)
When moving a motor using a crane or lift, use a hanging bolt if the
motor has a corresponding tapped hole, or textile rope if it has no
tapped hole. If a motor is attached with a machine or any other heavy
stuff, do not use a hanging bolt to move the motor as the hanging bolt
and/or motor may get broken.
- Before starting to connect a motor to electric wires, make sure they are isolated
from an electric power source.
A failure to observe this caution is vary dangerous because you may
get electric shocks.
- Be sure to secure power wires.
If operation is performed with a terminal loose, the terminal block
may become abnormally hot, possibly causing a fire. Also, the
terminal may become disconnected, causing a ground fault or short-
circuit, and possibly giving you electric shocks. See the section in this
manual that gives the tightening torque for attaching power wires and
short-bars to the terminal block.
- Be sure to ground a motor frame.
To avoid electric shocks, be sure to connect the grounding terminal in
the terminal box to the grounding terminal of the machine.
- Do not ground a motor power wire terminal or short-circuit it to another power
wire terminal.
A failure to observe this caution may cause electric shocks or a
burned wiring.
* Some motors require a special connection such as a winding
switching. Refer to their respective motor specification manuals
for details.
- Do not supply the power to the motor while any terminal is exposed.
A failure to observe this caution is very dangerous because you may
get electric shocks if your body or any conductive stuff touches an
exposed terminal.