Toshiba TOSVERT VF-AS1 Instruction Manual page 218

Models with an external filter
(1) 200V class: VFAS1-2110PM~2750P
If you are using one of the above inverters, insert an EMI filter on the primary side of the inverter. EMI filters have
the effect of suppressing conduction and radiation noises. Use the recommended noise filter specified in Table 2.
This combination of inverter and filter was used when examining the inverter for compliance with the EMC directive.
When using the inverter in Japan, you should preferably use an NF series filter (high-efficiency radio noise
reduction filter).
Table 2 lists noise filters recommended for the inverters.
Inverter type
VFAS1-2110PM
VFAS1-2150PM
VFAS1-2185PM
VFAS1-2220PM
VFAS1-2300PM
VFAS1-2370PM
VFAS1-2450PM
VFAS1-2550P
VFAS1-2750P
(2) Use shielded cables for the power and control cables, including filter input cables and inverter output 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) Install the filter and the inverter in an enclosed steel cabinet. Earth the cabinet body securely with the thickest and
shortest possible electric wire installed away from the power cables.
(4) Route the EMI filter input and output wires apart from each other.
(5) To limit the radiation noise from cables, earth each shielded cable to the noise cut plate. It is effective to earth
shielded cables in the vicinity of the inverter and filter (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 noise cut plate and cabinet.
Table 2 Combinations of inverter and EMI filter
Combination of inverter and filter
3-phase 200V class
I-3
Filter type
EMF3-4072E
EMF3-4072E
EMF3-4090F
EMF3-4090F
EMF3-4180H
EMF3-4180H
EMF3-4180H
Not supported
Not supported
E6581301
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