Lead Length Specifications
Adhere to the 2005 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. Suggested maximum lead lengths.
Model | PWM Carrier | NEMA | |
Frequency | Compliant Motors2 | ||
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230 Volt | All | 1000 feet | |
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460 Volt | < 5 kHz | 600 feet | |
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≥ 5 kHz | 300 feet | ||
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600 Volt | < 5 kHz | 200 feet | |
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≥ 5 kHz | 100 feet | ||
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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.
For proper operation, the carrier frequency must be 2.2 kHz or above except when operating in the Constant Torque or Variable Torque modes.
Startup and Test
Perform the following checks before turning on the unit:
•L1/R, L2/S, and L3/T are connected to the
•T1/U, T2/V, and T3/W are connected to the motor.
•The
•There are no shorts and all grounds are secured.
16 | W7 ASD Installation and Operation Manual |