Omron SYSDRIVE 3G3FV-*-CUE, Руководство по установке

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Induction Noise: Electromagnetic induction generates noise on the signal line, causing the controller
to malfunction.
Radio Noise: Electromagnetic waves from the Inverter and cables cause the broadcasting radio
receiver to make noise.
D
Cable Length between Inverter and Motor
As the cable length between the Inverter and the motor is increased, the floating capacity between the
Inverter outputs and the ground is increased proportionally. The increase in floating capacity at the In-
verter outputs causes the high-frequency leakage current to increase, and this may adversely affect
peripheral devices and the current detector in the Inverter’s output section. To prevent this from occur-
ring, use a cable of no more than 100 meters between the Inverter and the motor. If the cable must be
longer than 100 meters, take measures to reduce the floating capacity by not wiring in metallic ducts, by
using a separate cable for each phase, and so on.
Also adjust the carrier frequency according to the cable length between the Inverter and the motor, as
shown in the table below.
Model
Cable length 20 m max. 40 m max. More than 40 m
Carrier frequency 15 kHz max. 10 kHz max. 5 kHz max.
3G3FV
(Set value: C06-01) (15.0) (10.0) (5.0)
(Set value: C06-02) (15.0) (10.0) (5.0)
(Set value: C06-02) (0) (0) (0)
3G3HV (Set value: n050) (6) (4) (2)
Note 1. If the cable length exceeds 20 m, final check must be made for the whole system to conform to
the EMC Directive.
Note 2. The upper limit of carrier frequency depends on the inverter capacities as shown below.
3G3FV: 15 kHz for 30 kW or smaller models, 10 kHz for 37 kW or larger models
3G3HV: 15 kHz for 22 kW or smaller models, 10 kHz for 30 kW or larger models
Note 3. If the inverter overload (OL2) is detected before motor overload (OL1), lower the carrier fre-
quency setting.
D
Single-phase Motors Cannot Be Used
The Inverter is not suited for the variable speed control of single-phase motors.
Single-phase motors are either capacitor start motors or split-phase start motors. (The method for de-
termining rotation direction at startup is different.) If a capacitor start motor is used, the capacitor may be
damaged by a sudden electric discharge caused by Inverter output. If a split-phase start motor is used,
the starting coil may burn because the centrifugal switch does not operate.
Installation
Chapter 2