EM500 Open-Loop Vector Control Inverter User Manual
47
Note: 1. Take the voltage drop into consideration for selecting cable. Generally speaking,
the voltage drop value calculated by the following formula shall be less than 5V.
Voltage drop =
*Cable Resistivity (Ω/KM) * Cable Length (m) * Rated Current
(A) *10
-3
2. If power cable is laid in a plastic duct, it shall be one grade higher.
3. Cable shall be connected to round wiring terminals of applicable cable and
terminal screw.
4. The size of grounding cable should be the same as the power cable if the selected
power cable is less than 16 mm
2
, or not less than 1/2 of the power cable if the
selected power cable is greater than 16 mm
2
. Anyway, at least 16 mm
2
is a must.
Ground terminal must be grounded.
The third type grounding method specially (grounding resistance less than
10 Ω) must be adopted.
Never share the grounding cable with welder or power device.