Toshiba TOSVERT VF-MB1 Instruction Manual page 277

Three-phase 500 V class
Conductive noise
Inverter type
frequency of 4kHz
length of 10m or less)
VFMB1-4004PL
VFMB1-4007PL
VFMB1-4015PL
VFMB1-4022PL
VFMB1-4037PL
VFMB1-4055PL
VFMB1-4075PL
VFMB1-4110PL
VFMB1-4150PL
(2) Use shielded power cables, such as inverter output cables, and shielded control cables. Route the cables and
wires so as to minimize their lengths. Keep a distance between the power cable and the control cable and
between the input and output wires of the power cable. Do not route them in parallel or bind them together,
instead cross at right angle.
(3) It is more effective in limiting the radiation noise to install the inverter in a sealed steel cabinet. Using wires as
thick and short as possible, earth the metal plate and the control panel securely with a distance kept between
the earth cable and the power cable.
(4) Route the input and output wires apart from each other.
(5) To suppress radiation noise from cables, ground all shielded cables through a noise cut plate.
It is effective to earth shielded cables in the vicinity of the inverter and cabinet (within a radius of 10cm from
each of them). Inserting a ferrite core in a shielded cable is even more effective in limiting the radiation noise.
(6) To further limit the radiation noise, insert a zero-phase reactor in the inverter output line and insert ferrite cores
in the earth cables of the metal plate and cabinet.
Combination of inverter and filter
Conductive noise
IEC61800-3, IEC61800-3,
category C2 category C2
(PWM carrier (PWM carrier
frequency of 12kHz
and motor wiring and motor wiring
length of 5m or less)
Built-in filter Built-in filter
-
I-3
Conductive noise
IEC61800-3,
category C3
(PWM carrier
frequency of 12kHz
and motor wiring
length of 25m or less)
-
- Built-in filter
E6581697
9