Ground Wiring - Omron SYSDRIVE 3G3FV User Manual

Installation
Note The carrier frequency setting range varies depending on the Inverter capacity.
200-V class, 18.5 kW max.; 400-V class, 30 kW max.: 0.4 to 15.0 kHz
200-V class, 22 to 75 kW; 400-V class, 37 to 160 kW: 0.4 to 10.0 kHz
400-V class, 185 to 300 kW:
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.
H Ground Wiring
Always use the ground terminal of the 200-V Inverter with a ground resistance of less than 100
that of the 400-V Inverter with a ground resistance of less than 10 .
Do not share the ground wire with other devices such as welding machines or power tools.
Always use a ground wire that complies with technical standards on electrical equipment and mini-
mize the length of the ground wire.
Leakage current flows through the Inverter. Therefore, if the distance between the ground electrode
and the ground terminal is too long, potential on the ground terminal of the Inverter will become unsta-
ble.
When using more than one Inverter, be careful not to loop the ground wire.
0.4 to 2.5 kHz
Chapter 2
and
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