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.

 

 

Table 1.

 

 

 

Model

PWM Carrier

NEMA MG-1-1998 Section IV Part 31

Frequency

Compliant Motors2

 

230 Volt

All

1000 feet

 

 

 

460 Volt

< 5 kHz

600 feet

 

 

≥ 5 kHz

300 feet

 

 

 

 

Note: Contact Toshiba 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.

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H9 ASD Installation and Operation Manual

Page 28
Image 28
Toshiba H9 Lead Length Specifications, Model, Nema MG-1-1998 Section IV Part, Frequency Compliant Motors, PWM Carrier