2-2 Wiring „ Ground Terminal (G ) • To prevent electric shock, be sure to ground the Inverter and the motor. • According to the Electric Apparatus Engineering Regulations, the 200-V class Inverter should be connected to the grounding electrodes under type-D grounding conditions (conventional type 3 grounding: ground resistance 100 Ω or less), the 400-V class Inverter should be connected to the grounding electrodes under type-C grounding conditions (conventional special type 3 grounding: ground resistance 10 Ω or less). • For the ground cable, use the applicable cable or a cable with a larger diameter. Make the cable length as short as possible.
• When several Inverters are connected, the ground cable must not be connected across several Inverters, and must not be looped. Otherwise, the Inverters may malfunction. 2 Design Inverter Inverter Inverter Inverter Your ground bolt Inverter Inverter „ Installing Screws in the Main Circuit Terminal Block • For the main circuit terminal blocks of 3G3RX-A2055/-A2075/-A4055/-A4075, be sure to install the terminal block screw washers with their grooved sides aligned vertically, as shown below. Not doing so may result in a contact failure or fire. (Intended terminals: R/L1, S/L2, T/L3, +1, P/+2, N/-, U/T1, V/T2, W/T3, RB) Terminal block screw washer 2-13