Delta IED-S Series, User Manual

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Appendix A. Single-phase Application | IED-S
A-3
A.3 Input Frequency and Voltage Tolerance
Drive's rated current values, as Tables A.2-1
–
A.2-3 show, are based on 60 Hz single-phase
input. When using frequency other than 60 Hz, the input frequency should be further examined
by the drive's manufacturer. The voltage for single-phase input power supply should be 220 V
AC
,
with -10
–
5% tolerance to motor's maximum voltage. A tolerance of -10
–
5% voltage is allowed
between standard products and three-phase power input, so pay extra attention when entering
tolerance values if you apply single-phase for drives. Because single-phase input average DC
bus voltage is lower than the equivalent three-phase input, the maximum output voltage (motor
voltage) will be lower than the single-phase input.
The input voltage should not be lower than 228V
AC
for 230V model to ensure 207V
AC
voltage
is generated for motors. Thus, if motor torque at basic speed under full-load is required, maintain
input voltage in a stable status. If you need to obtain the rated horsepower, you can try to use
more transformers.
You can use Table A.2-1 to help select applicable drives for 220V
AC
motors. The additional
reactor sets the standard for limiting the DC bus ripple and improves the input power factors of
all models. For single-phase power input, the more DC bus ripple, the larger the drive's overload
capacity. Therefore, it is necessary to fully understand the overload requirements of all
applications. Before using single-phase applications, you must obtain relevant data from the
motor's nameplate such as horsepower (HP) and full-load amperage (FLA).The drive you use
should meet or exceed the HP and FLA requirements listed on the motor's nameplate.