Delta C2000 Series User Manual

Chapter 7 Optional AccessoriesC2000
7-37
Motor Cable Length
1. Leakage current to affect the motor and counter measurement
If the cable length is too long, the parasitic capacitance between cables will enlarge and may
increase leakage current. It will activate the protection of over current, and increased leakage current
will not ensure the correction of current value in display. The worst case is that AC motor drive may
damage.
If more than one motor is connected to the AC motor drive, the total wiring length is the sum of
the wiring length from AC motor drive to each motor.
For the 460V series AC motor drive, when an overload relay is installed between the drive and
the motor to protect motor from overheating, the connecting cable must be shorter than 50m. However,
an overload relay malfunction may still occur. To prevent the malfunction, install an output reactor
(optional) to the drive or lower the carrier frequency setting (Pr. 00-17).
2. Surge voltage to affect the motor and counter measurement
When motor is driven by a PWM signal of AC motor drive, the motor terminals will experience
surge voltages (dv/dt) easily due to power transistors conversion of AC motor drive and cable
capacitance. When the motor cable is very long (especially for the 460V series), surge voltages (dv/dt)
may reduce insulation quality. To prevent this situation, please follow the rules below:
a. Use a motor with enhanced insulation
b. Connect an output reactor (optional) to the output terminals of the AC motor drive
c. Reduce the motor cable length to suggested value
The suggested motor shielded cable length in the following table complies with IEC 60034-17,
which is suitable for the motor with rated voltage under 500 VAC, and the insulation level of
peak-to-peak over (including) 1.35kV
230V Model
Rated current
(ND) (Arms)
Without AC reactor With AC reactor
Shielded Cable
[meter]
Non-shielded
cable [meter]
Shielded Cable
[meter]
Non-shielded
cable [meter]
VFD007C23A 5 50 75 75 115
VFD015C23A 8 50 75 75 115
VFD022C23A 11 50 75 75 115
VFD037C23A 17 50 75 75 115
VFD055C23A 25 50 75 75 115
VFD075C23A 33 100 150 150 225
VFD110C23A 49 100 150 150 225
VFD150C23A 65 100 150 150 225
VFD185C23A 75 100 150 150 225
VFD220C23A 90 100 150 150 225
VFD300C23A/E 120 100 150 150 225
VFD370C23A/E 146 100 150 150 225
VFD450C23A/E 180 150 225 225 325
VFD550C23A/E 215 150 225 225 325
VFD750C23A/E 255 150 225 225 325
VFD900C23A/E 346 150 225 225 325
Table 7-45

Delta C2000 Series Specifications

General

Operating Temperature	-10°C to 50°C
Storage Temperature	-20°C to 60°C
Overload Capacity	150% of rated current for 60 seconds
Communication	DeviceNet
Protection	Overvoltage, Undervoltage, Overcurrent, Overload, Overheat
Humidity	5% to 95% (non-condensing)
Cooling	Forced air cooling
Control Mode	V/F Control, Sensorless Vector Control