LG SV008iS5-2, Manual, Page: 78 / 150

Chapter 1 - Installation
11
1.7.4 Wiring Power Terminals
„
Wiring Precautions
9
The internal circuits of the inverter will be damaged if the incoming power is connected and applied to
output terminals (U, V, W).
9
Use ring terminals with insulated caps when wiring the input power and motor wiring.
9
Do not leave wire fragments inside the inverter. Wire fragments can cause faults, breakdowns, and
malfunctions.
9
For input and output, use wires with sufficient size to ensure voltage drop of less than 2%.
Motor torque may drop of operating at low frequencies and a long wire run between inverter and motor.
9
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.
9
Never short between B1 and B2 terminals of the inverter.
9
The main circuit of the inverter contains high frequency noise, and can hinder communication equipment
near the inverter. To reduce noise, install line noise filters on the input side of the inverter.
9
Do not use power factor capacitor, surge killers, or RFI filters on the output side of the inverter. Doing so
may damage these components.
9
Always check whether the LCD and the charge lamp for the power terminal are OFF before wiring
terminals. The charge capacitor may hold high-voltage even after the power is disconnected. Use caution
to prevent the possibility of personal injury.
„
Grounding
9
The inverter is a high switching device, and leakage current may flow. Ground the inverter to avoid
electrical shock. Use caution to prevent the possibility of personal injury.
9
Connect only to the dedicated ground terminal of the inverter. Do not use the case or the chassis screw for
grounding.
9
When installing, grounding wire should be connected first and removed last.
9
Grounding wire should be at least the size listed in the following table and be as short as possible.
Grounding wire dimensions, AWG (mm
²
)
Inverter
Capacity
200V class 400Vclass
Below 5 HP 12 ((3.5) 14 (2)
7.5 ~ 10 HP 10 (5.5) 12 (3.5)
15 ~ 20 HP 6 (14) 8 (8)
25 ~ 30 HP 4 (22) 6 (14)
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