34
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. Never con-
nect them to terminals U/T1, V/T2, W/T3, B1, B2, −, +1, or +2. The Inverter may be dam-
aged 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 the
local grounding code.
Failure to observe this warning may result in an electric
shock or a fire.
Never ground the V7AZ to the same ground as welding machines, motors, or other electri-
cal equipment.
When several V7AZ Inverters are used side by side, ground each as shown in the following
examples. Do not loop the ground wires.
Grounding
[Example of 3-phase,
400 V Class, 0.37 kW Inverters]
MCCB or
Leakage
Breaker
L1 L2 L3
NOTE
WARNING
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