2-7
(2) Arrangement of control circuit terminals (common to all inverter types)
Recommended wire size: 0.65 to 0.82 mm
2
(AWG 19 or 18)*
* Using wires exceeding the recommended sizes may lift the front cover depending upon the
number of wires used, impeding keypad's normal operation.
2.3.3 Wiring precautions
Follow the rules below when performing wiring for the inverter.
(1) Make sure that the source voltage is within the rated voltage range specified on the nameplate.
(2) Be sure to connect the three-phase power wires to the main circuit power input terminals L1/R, L2/S and L3/T of the
inverter. If the power wires are connected to other terminals, the inverter will be damaged when the power is turned ON.
(3) Always connect the grounding terminal to prevent electric shock, fire or other disasters and to reduce electric noise.
(4) Use crimp terminals covered with insulated sleeves for the main circuit terminal wiring to ensure a reliable connection.
(5) Keep the power supply wiring (primary circuit) and motor wiring (secondary circuit) of the main circuit, and control
circuit wiring as far away as possible from each other.
(6) After removing a screw from the main circuit terminal block, be sure to restore the screw even if no wire is connected.
(7) Use the wiring guide to separate wiring. For inverters with a capacity of 3.7 kW or below, the wiring guide separates the
main circuit wires and the control circuit wires. For inverters with a capacity of 5.5 to 22 kW, it separates the upper and
lower main circuit wires, and control circuit wires. Be careful about the wiring order.
FRN3.7G1
-4 FRN11G1
-4
Note: A box (
) in the above figure replaces S or E depending on the enclosure.
A box () in the above figure replaces A or E depending on the shipping destination.
Preparing for the wiring guide
Inverters with a capacity of 11 to 22 kW (three-phase 200 V class series) are sometimes lacking in wiring space for main
circuit wires depending upon the wire materials used. To assure a sufficient wiring space, remove the clip-off sections
(see below) as required with a nipper. Note that the enclosure rating of IP20 may not be ensured when the wiring guide
itself is removed to secure a space for thick main circuit wiring.
Before removal of clip-off sections After removal of clip-off sections
Wiring Guide (FRN15G1
-4)
Note: A box (
) in the above figure replaces S or E depending on the enclosure.
A box () in the above figure replaces A or E depending on the shipping destination.
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