Toshiba VF-nC1 - Manual (Page 104)

E6581090
I-2
9
9.1.3 Compliance with EMC directive
9.1.3.1 The model, noise filter inside
(1) Single-phase 200V class : VFNC1S-2002PL to 2022PL
The above mentioned models install EMI noise filter inside. So the conducted and radiated
noise can be reduced, optional EMI noise filters are not needed.
(The additional noise filter should be installed, when more effective reduction is required.)
(2) The main cables such as input to the EMI filter and output of the inverter and the signal cables
should be shielded, then cable length should be wired as short as possible. The main input
cable should be separated from the main output cable, and cables for control signal also should
be separated from main cables, not wiring parallel and not bundling, cross the wires where
necessary.
(3) Install EMI filter and inverter on the same metal back plate in an inverter panel. The metal back
plate or the cubicle must be grounded absolutely, by using short thick wires, separated from the
main cables.
(4) Shielded cables should be grounded on the metal back plate in order to reduce the radiated
noise from the other cables. It is an effective measure that shielded cables are grounded close
to the inverter or/and operation panel or/and EMI filter(less than 10cm).
(5) Installation of the zero-phase and/or the ferrite core can also effectively reduce the radiated
noise further.(Input or/and output of inverter)
【 Ex. Countermeasure - main circuit wiring】
Fig. 1
IM
Inverter
panel
(Metal)
Separate input and
output cables.
Do not run input
cables along-side
output cables.
Do not bundle input
and output cables.
Shielded cables
Connect to the
power source
Connect to
the control
Grounding
plate