20 P9 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 affect 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.
All Toshiba CT motors use an insulation system that is NEMA MG1 Part 30 compliant.
All Toshiba XT motors use an insulation system that is NEMA MG1 Part 31 compliant.
Table 1 lists the suggested maximum lead lengths for the listed motor voltages.
Note: Contact the TIC Customer Support Center for application assistance when using lead
lengths in excess of those listed or for filter selection assistance for a given application.
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 MG1 Part 30
Compliant Motors
NEMA MG1 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
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