LS SV-iG5H Series, Manual, Page: 26 / 226

12
Installation & Wiring
Apply the rated torque to terminal screws. Loosen screws can cause of short circuit and

malfunction. Tightening the screw too much can damage the terminals and cause short
circuit and malfunction.
Use copper wires only with 600V, 75
℃
ratings for wiring.

Make sure the input power is off before wiring.

When power supply is switched off following operation, wait at least 10 minutes after LED

keypad display is off before you start working on it.
Applying input power supply to the output terminals U, V and W causes internal inverter

damage.
Use ring terminals with insulated caps when wiring the input power and motor wiring.

Do not leave wire fragments inside the inverter. Wire fragments can cause faults,

breakdowns and malfunctions.
When more than one motor is connected to one inverter, total wire length should be less

than 200m (656ft). Do not use a 3-wire cable for long distances. Due to increased leakage
capacitance between wires, over-current protective feature may operate or equipment
connected to the output side may malfunction. In case of long wire length, it should be
required to lower carrier frequency or use Micro Surge Filter.
Length between Inverter and
Motor
Up to 50m Up to 100m More than 100m
Allowable Carrier Frequency Less than 15kHz Less than 5kHz Less than 2.5kHz
(For products of less than 3.7kW, the wire length should be less than 100m(328ft)).
Never short B1 and B2 terminals. Shorting terminals may cause internal inverter damage.

Do not install a power factor capacitor, surge suppressor or RFI filters in the output side of

the inverter. Doing so may damage these components.
To avoid circuit interruption or damaging connected equipment, do not install magnetic

contactors on the output side of the inverter.
Power supply must be connected to the R, S, and T Terminals.
Connecting it to the U, V, W terminals causes internal damages to the inverter. Arranging the
phase sequence is not necessary.
Motor should be connected to the U, V, and W Terminals.
If the forward command (FX) is on, the motor should rotate counter clockwise when viewed
from the load side of the motor. If the motor rotates in the reverse, switch the U and V
terminals.