20 ACE-tronics G9 ASD Installation and Operation Manual
Lead Length Specifications
Adhere to the NEC and any local codes during the installation of ASD/motor systems. Excessive lead
lengths may adversely effect the performance of the motor. Special cables are not required. Lead lengths
from the ASD to the motor in excess of those listed in Table 1 may require filters to be added to the output
of the ASD. Table 1 lists the suggested maximum lead lengths for the listed motor voltages.
All Toshiba CT motors incorporate an insulation system that is in compliance with NEMA MG1 Part 30.
All Toshiba XT motors incorporate an insulation system that is in compliance with NEMA MG1 Part 31.
Note: Contact the ACE World Companies Customer Support Center for application
assistance when using lead lengths in excess of those listed.
Exceeding the peak voltage rating or the allowable thermal rise time of the motor
insulation will reduce the life expectancy of the motor.
When operating in the Vector Control mode the carrier frequency should be set to
2.2 kHz or above.
Table 1. Lead Length Recommendations.
Model
PWM Carrier
Frequency
NEMA MG-1 Part 30
Compliant Motors
NEMA MG-1 Part 31
Compliant Motors
230-Volt All 450 feet 1000 feet
460-Volt
< 5 kHz 200 feet 600 feet
≥ 5 kHz 100 feet 300 feet
575-Volt
< 5 kHz 75 feet 200 feet
≥ 5 kHz 50 feet 100 feet
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