Electrical Design Guide
‑25‑
3.2 Power Cable Selection
3.2.1 Power Supply Cable
3.2.1.1 Rules
Read the section Rules carefully. Failure to comply may result in serious consequences.
● Do not use the power from IT system for the drive. Use the power from TN/TT
system for the drive. Failure to comply may result in an electric shock.
● Connect a electromagnetic contactor between the input power supply and the
main circuit power supply of the servo drive (R, S and T) to form a structure which
allows independent power cutoff on the servo drive power side. This is to prevent
fire accident caused by continuous high current generated upon fault.
● Check that the input power supply of the drive is within the specified voltage
range. Failure to comply may result in faults.
● The main circuit cable must be away from the motor so that its insulation will not
be damaged by high temperature of the motor surface.
● Use the ALM (fault) signal to cut off the main circuit power supply. A faulty braking
transistor may overheat the regenerative resistor and lead to a fire.
● Connect the PE terminal of the drive to the PE terminal of the control cabinet.
Failure to comply may result in an electric shock.
● Ground the entire system properly. Failure to comply may result in equipment
malfunction.
● After the power supply is cut off, residual voltage is still present in the internal
capacitor of the drive, wait for at least 15 min before further operations. Failure to
comply may result in an electric shock.
● The specification and installation of external cables must comply with applicable
local regulations.
● Observe the following requirements when the servo drive is used on a vertical axis.
—— Set the safety device properly to prevent the workpiece from falling upon
warning or overtravel.
—— Ensure the positive/negative polarity of the 24 V power supply is correct.
Otherwise, the axis may fall and cause personal injury or equipment damage.
● It is recommended to use Teflon cables featuring a higher temperature limit when
the temperature inside the cabinet exceeds the temperature limit of regular
cables. As the surface of regular cables may be easily hardened and cracked under
low temperature, take thermal insulation measures for cables laid in
environments with low temperature.
● The servo drive must be grounded properly. Failure to comply may result in device
malfunction or damage.
To Next Page
Loading...
