2.2 Wiring
2-7
2.2.3 Wiring precautions
Pay attention to the following items when carrying out wiring.
(1) Confirm that the supply voltage is within the input voltage range described on the rating plate.
(2) Always connect the power lines to the inverter main power input terminals L1/R, L2/S, and L3/T (three-phase).
(The inverter will be damaged when power is applied if the power lines are connected to the wrong terminals.)
(3) Be sure to connect a ground wire in order to prevent accidents such as electric shock or fire, and to reduce
noise.
(4) For the lines connecting to the main circuit terminals, use crimped terminals with insulating sleeves or use
crimped terminals in conjunction with insulating sleeves for high connection reliability.
(5) Separate the routing of the lines connected to the main circuit input side terminals (primary side) and the
output side terminals (secondary side) and the lines connected to the control circuit terminals.
The control circuit terminal lines should be routed as far as possible from the main circuit routing. Malfunction
may occur due to noise.
(6) To prevent direct contact with the main circuit live sections (such as the main circuit terminal block), route the
control circuit wiring inside the inverter as bundles using cable ties.
(7) After removing a main circuit terminal screw, always restore the terminal screw in position and tighten even if
lines are not connected.
(8) The wiring guide is used to separately route the main circuit wiring and the control circuit wiring. The main
circuit wiring and the control circuit wiring can be separated. Exercise caution for the order of wiring.
Main circuit wiring (upper level)
Main circuit wiring
(lower level)
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