User Manual of EM730 Series Inverter Table 3- 1 Cable Dimensions and Terminal Screw Specifications Note: 1: The specifications of the wire are dependent on its voltage drop. Under normal circumstances, the voltage drop calculated by the following formula should be less than 5V. Voltage drop = 3 * wire resistivity (Ω/KM) * wire length (m) * rated current (A) * 10 -3 2: If the wire is in a plastic slot, it should be enlarged by one level. screw. 3: The wire should be crimped to the round terminal suitable for the wire and terminal 4: The specification of the ground wire should be the same as that of the power cable smaller than 16mm 2 .
When the power cable is 16mm 2 or larger, the ground wire should not be smaller than 1/2 of the power cable. 3.2.7 Ground wire The ground terminal must be grounded. Pay special attention to the third type of grounding (grounding resistance: less than 10Ω). The ground wire must not be shared by the welding machine and power devices. 41 EM730-055-3 M8 9.0～10.0 35 EM730-075-3 M10 17.0～22.0 60 EM730-090-3 60 EM730-110-3 90 EM730-132-3 R, S, T, P, +, -, U, V, W 90 EM730-160-3 120 EM730-185-3 R, S, T, P, +, -, U, V, W M12 30.0～40.0 180 EM730-200-3 EM730-220-3 2*120 EM730-250-3 EM730-315-3 2*150 EM730-355-3 EM730-400-3 EM730-450-3