Lead Length Specifications; Startup And Test - Toshiba H7 Operation Manuals

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
of the ASD. Table 1
Model
230 Volt
460 Volt
600 Volt
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, Variable Torque, or the 5-Point Setting modes.

Startup and Test

Perform the following checks before turning on the unit:
• L1/R, L2/S, and L3/T are connected to the 3-phase input power.
• T1/U, T2/V, and T3/W are connected to the motor.
• The 3-phase input voltage is within the ASD setup tolerances.
• There are no shorts and all grounds are secured.
10
lists the suggested maximum lead lengths for the listed motor voltages.
Table 1.
NEMA MG-1-1998 Section IV Part 31
PWM Carrier
Frequency
All 1000 feet
≤ 5 kHz
600 feet
> 5 kHz
300 feet
≤ 5 kHz
200 feet
> 5 kHz
100 feet
Table 1 may require filters to be added to the output
2
Compliant Motors
H7 ASD Operation Manual