LSIS G100, Operation Manual

Page: 28 / 343

2.2 Wiring
Open the front cover, remove the cable guides and control terminal cover, and then
install the ground connection as specified. Complete the cable connections by
connecting an appropriately rated cable to the terminals on the power and control
terminal blocks. Read the following information carefully before carrying out wiring
connections to the inverter. All warning instructions must be followed.
•
Install the inverter before carrying out wiring connections.
•
Ensure that no small metal debris, such as wire cut-offs, remain inside the inverter.
Metal debris in the inverter may cause inverter failure.
•
Tighten terminal screws to their specified torque. Loose terminal block screws may
allow the cables to disconnect and cause short circuit or inverter failure. Refer to
11.6
Terminal Screw Specification on page 313 for torque specifications.
•
Do not place heavy objects on top of electric cables. Heavy objects may damage the
cable and result in electric shock.
•
The power supply system for this equipment (inverter) is a grounded system. Only use
a grounded power supply system for this equipment (inverter). Do not use a TT, TN, IT,
or corner grounded system with the inverter.
•
The equipment may generate direct current in the protective ground wire. When
installing the residual current device (RCD) or residual current monitoring (RCM), only
Type B RCDs and RCMs can be used.
•
Use cables with the largest cross-sectional area, appropriate for power terminal wiring,
to ensure that voltage drop does not exceed 2%.
•
Use copper cables rated at 600 V, 75
℃
for power terminal wiring.
•
Use copper cables rated at 300 V, 75
℃
for control terminal wiring.
•
Separate control circuit wires from the main circuits and other high voltage circuits (200
V relay sequence circuit).
•
Check for short circuits or wiring failure in the control circuit. They could cause system
failure or device malfunction.
•
Use shielded cables for control terminal wiring. Failure to do so may cause malfunction
due to interference. When grounding is needed, use shielded twisted pair (STP)
cables.
•
If you need to re-wire the terminals due to wiring-related faults, ensure that the inverter
keypad display is turned off and the charge lamp under the front cover is off before
working on wiring connections. The inverter may hold a high voltage electric charge
long after the power supply has been turned off.