4. Wiring
29
Wiring the Main Circuits
• Main Circuit Input Power Supply
Always connect the power supply line to input terminals R/L1, S/L2, and T/L3 (R/L1, S/
L2 for single-phase Inverters). Never connect them to terminals U/T1, V/T2, W/T3, B1,
B2,
−
, +1, or +2. The Inverter may be damaged if the wrong terminals are connected.
For single-phase Inverters, always use terminals R/L1 and S/L2. Never connect
terminal T/L3.
• Grounding (Use ground terminal
.)
Always ground the ground terminal
according to local grounding codes.
Never ground the VS mini to the same ground as welding machines, motors, or other elec-
trical equipment.
When several VS mini Inverters are used side by side, ground each as shown in examples.
Do not loop the ground wires.
MCCB or
Leakage
Breaker
Ground
[Example of 3-phase,
200 V Class, 1.5 kW Inverters]
R S T
NOTE
Good
Good
Poor