Toshiba G7 사용자 설명서
G7 ASD Operation Manual
21
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
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
may require filters to be added to the output
of the ASD.
lists the suggested maximum lead lengths for the listed motor voltages.
Note:
Contact Toshiba for application assistance when using lead lengths in excess of those
listed.
listed.
Exceeding the peak voltage rating or the allowable thermal rise time of the motor
insulation will reduce the life expectancy 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.
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 specified tolerance.
• There are no shorts and all grounds are secured.
Table 2.
Model
PWM Carrier
Frequency
NEMA MG-1-1998 Section IV Part 31
Compliant Motors
2
230 Volt
All
1000 feet
460 Volt
< 5 kHz
600 feet
≥ 5 kHz
300 feet
600 Volt
< 5 kHz
200 feet
≥ 5 kHz
100 feet