15
Class A, Industrial Environment (only for drives with built-in EMC class A filter, U20----S)
Power part
l
When the distance between the inverter and motor is longer than 100m, connection wire
should be carefully chosen to reduce the wiring resistance below 3% and the voltage drop (V)
=
√
3 x Wire resistance (
Ω
/km) x wire length (m) x current x 10
-3
(B) Control circuitry wiring must be separated and away from the primary circuitry control line and
other high-voltage or large-current power lines to avoid noise interference.
l
To reduce the noise interference and avoid mistake operation, shielded twisted pair cable must
be used to wire the control circuitry. Please refer to following diagram. Connect the shielding
wire onto the grounding terminal.
Wiring distance must be under 50m.
(C) The grounding terminal of the inverter must be correctly grounded in compliance with 200V class
type three grounding.
l
Grounding wire should be wired in accordance to electrical equipment (AWG) with the length
of the grounding wire as short as possible.
l
The grounding wire of the inverter must not be grounded together with other large current
loading (such as soldering machine or large power motor). They should be grounded
separately.
Shielding
Glove
To Inverter terminal
Connect to system grounding terminal Wrapped with
insulating tape
To control machine
Do not connect the shielding
wire at this end
