LS SV-xxx-iP5A-2, Руководство пользователя

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Chapter 3 - Installation
3-12
3.2.2 Wiring power terminals
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Wiring Precautions
1) The internal circuits of the inverter will be damaged if the incoming power is
connected and applied to output terminals (U, V, W).
2) Use ring terminals with insulated caps when wiring the input power and motor
wiring.
3) Do not leave wire fragments inside the inverter. Wire fragments can cause
faults, breakdowns, and malfunctions.
4) For input and output, use wires with sufficient size to ensure voltage drop of
less than 2%.
5) Motor torque may drop of operating at low frequencies and a long wire run
between inverter and motor.
6) The cable length between inverter and motor should be less than 150m (492ft).
Due to increased leakage capacitance between cables, overcurrent protective
feature may operate or equipment connected to the output side may
malfunction. The total cable length should be less than 150 m (492ft) in case
the many motors are connected. Do not use the 3-core cable in the wiring for
long distance. In the wiring for long distance, lower the carrier frequency and
use the output circuit filter.
Distance between Motor and inverter 50m 100m Above 100m
Max. permissible carrier freq. 15kHz 5kHz Below 2kHz
(But for products of less than 11kW, tha cable lentgh should be less than 100m.)
7) 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.
8) Do not use power factor capacitor, surge killers, or RFI filters on the output side
of the inverter. Doing so may damage these componentss.
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.
10) Do not connect with MC at output pare of inverter and make MC On/Off during
operation. It can cause the Trip or damage of inverter.
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Grounding
1) 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. The ground impedance for 200V class is 100 ohm with 400V class 10ohm.
(Protective Class : I)
2) Connect only to the dedicated ground terminal of the inverter. Do not use the case
or the chassis screw for grounding.
3) The protective earth conductor must be the first one in being connected and the last
one in being disconnected.
4) As a minimum, grounding wire should meet the specifications listed below.
Grounding wire should be as short as possible and should be connected to the