Yaskawa Z1000U - Manual (Page 17)

u General Application Precautions
n Selection
Drive Rated Output Current
Make sure that the motor rated current is less than the rated output current for the drive.
When 2 Seconds is Required for Momentary Power Loss Ride-Thru Time
Use the units listed below when continuing drive operation after the power is restored even after a momentary loss of power
of 2 seconds occurs:
• 200 V class Momentary Power Loss Ride-Thru unit: Model no. P0010
• 400 V class Momentary Power Loss Ride-Thru unit: Model no. P0020
Drive Start-Up Time
The drive requires 1.5 seconds to prepare for operation after the power is turned on. Be mindful of this delay when using an
external reference input.
Note: 1.5 seconds is the required time when no optional devices are used with the drive. When using an optional communication device, the time
required for the drive to be ready for operation will vary in accordance with the start up time of the communication card.
Selection of Power Supply Capacity
Use a power supply greater than the rated input capacity (kVA) of the drive. If the power supply is lower than the rated capacity
of the drive, the device will be unable to run the application properly and will trigger a fault.
The rated input capacity of the drive, S
CONV
(kVA), can be calculated by the following formula:
S
CONV
= √3 × I
in
× V
in
/1000
(I
in
: Rated input current [A], V
in
: Applicable power supply voltage [V])
Connection to Power Supply
The total impedance of the power supply and wiring for the rated current of the drive is %Z = 10% or more. Power voltage
distortion may occur when the impedance of the power supply is too large. When wiring over long distances, be sure to take
preventative measures such as using thick cables or series wiring to lower the impedance of wiring. Contact Yaskawa or your
Yaskawa agent for details.
Grounding the Power Supply
Yaskawa recommends using a dedicated ground for the power supply, as the drive is designed to run with a 1:1 ratio relative
to the power supply. Ground other devices should as directed in the specifications for those devices. Take particular care when
connecting sensitive electronic equipment such as OA devices. Separate ground lines and install a noise filter to prevent
problems from noise.
When Using a Generator as a Power Supply
Select the generator capacity approximately twice as large as the drive input power supply capacity. Set the deceleration time
or load so that the regenerative power from the motor will be 10% or less of the generator capacity. For further information,
contact a Yaskawa representative.
When a Phase Advance Capacitor or Thyristor Controller is Provided for the Power Supply
The drive does not require a phase advance capacitor. Installing a phase advance capacitor to the drive will weaken the power
factor.
Attach a phase-advance capacitor with a series reactor to prevent oscillation with the drive after installing the phase advance
capacitor on the same power supply system as the drive.
Contact Yaskawa or your Yaskawa agent when a device generating voltage surge or voltage distortion such as DC motor drive
thyristor controller or magnetic agitator is installed on the same power supply system.
Prevention Against EMC or Harmonic Leakage Current
Use units with built-in EMC filters that have the CE marking.
Use a zero-phase reactor as a noise filter when a device that will be affected by noise is near the drive.
Effects of Power Supply Distortion
Distortion of the power supply voltage increases the harmonics contents due to power supply harmonics entering the drive.
Starting Torque
The startup and acceleration characteristics of the motor are restricted to the drive overload current rating.
i.2 General Safety
YASKAWA ELECTRIC TOEP C710636 10B Z1000U HVAC MATRIX Drive User Manual 17