
SAFETY PRECAUTIONS B-65262EN/03
s-4
WARNING
- Connect power wires securely so that they will not get loose.
Securely connect power wires and short bars to the terminal block
with the specified tightening torque according to the procedures
described in this manual. If a motor runs with a wire loosely
connected, the terminal block may get abnormally hot, resulting in a
fire. The wire may also be disconnected, resulting in a ground fault,
short circuit, or electric shock.
- 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.
- Do not get close to a rotary section of a motor when it is rotating.
A rotating part may catch your cloths or fingers. Before starting a
motor, ensure that there is no stuff that can fly away (such as a key)
on the motor.
- Before touching a motor, shut off the power to it.
Even if a motor is not rotating, there may be a voltage across the
terminals of the motor.
Especially before touching a power supply connection, take sufficient
precautions.
Otherwise you may get electric shocks.
- Do not touch any terminal of a motor for a while (at least 5 minutes) after the
power to the motor is shut off.
High voltage remains across power line terminals of a motor for a
while after the power to the motor is shut off. So, do not touch any
terminal or connect it to any other equipment. Otherwise, you may get
electric shocks or the motor and/or equipment may get damaged.
- To drive a motor, use a specified amplifier and parameters.
An incorrect combination of a motor, amplifier, and parameters may
cause the motor to behave unexpectedly. This is dangerous, and the
motor may get damaged.
- Do not touch a regenerative discharge unit for a while (at least 30 minutes) after
the power to the motor is shut off.
A regenerative discharge unit may get hot when the motor is running.
Do not touch the regenerative discharge unit before it gets cool
enough. Otherwise, you may get burned.
- Do not touch a motor when it is running or immediately after it stops.
A motor may get hot when it is running. Do not touch the motor
before it gets cool enough. Otherwise, you may get burned.