Using Shielded Power Wires And Shielded Control Wires; Installing Inverter In Steel Cabinet; Grounding Of Shielded Wires; Inserting Zero-Phase Reactor And Ferrite Cores - Toshiba TOSVERT VF-AS3 Instruction Manual

Power supply wiring
(No shielded grounding needed)
[R/L1], [S/L2], [T/L3]

Using shielded power wires and shielded control wires

• Use shielded power wires, such as inverter input/output wires, and shielded control wires.
• Route the wires and wires so as to minimize their lengths.
• Keep a distance between the power cable and the control wire and between the input and
9

Installing inverter in steel cabinet

• Install the inverter in a sealed steel cabinet.
• Using wires as thick and short as possible, ground the metal plate and the control panel
Routing input and output wires apart
• Route the input and output wires apart as far as possible from each other.

Grounding of shielded wires

• To ground shielded wires through a metal conduit.
• To ground the shielded control wires by fixing the metal saddle of the body.
• Inserting a ferrite core in a shielded wire is even more effective in limiting the radiated noise.

Inserting zero-phase reactor and ferrite cores

• Insert a zero-phase reactor in the inverter output line.
• Insert ferrite cores in the grounding wires of the metal plate and cabinet.
Recommended parts for EMC Directive compliance are shown in the table below.
9. Measures to satisfy standards
Motor wiring
(Shielded grounding needed)
[U/T1], [V/T2], [W/T3]
output wires of the power cable. Do not route them in parallel or bind them together.
Instead, if necessary, cross at right angle.
securely with a distance kept between the grounding wire and the power wire.
Cable
When the shielded wires need grounding,
modify before installing as shown in the
figure below.
Peel off the outer sheath of the cable
and fix the shielded part with a clamp.
9-4
E6582062
Screws (x2)
Clamp