Fuji Electric FRENIC-VG Series, User Manual

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6.14.5 Basic schematic diagram
Refer to 6.1.4 Installing Internal Options (OPC-VG1- ) and wire and connect the FRENIC-VG.
• Improper connections may result in electric shocks or fires. Qualified electricians should carry out wiring. Turn
OFF the breaker on the power supply side for electric shock prevention in the case of touching the electric
circuit during connection work.
Do not touch the smoothing capacitors soon after the breaker is turned OFF, because the smoothing capacitors
will store charge for a while and an electric shock will be received. Check with a multimeter that the DC
voltage on the inverter is low enough after the CHARGE lamp of the inverter is turned OFF.
• Do not use the product that is damaged or lacking parts. Otherwise, injury and damage may result.
Incorrect handling in installation/removal jobs could cause a failure.
There are terminal blocks under the lower part of the unit (see figure 6.14.1 and figure 6.14.2). Wire the
terminal blocks with the following items kept on mind.
Make sure that the terminal blocks are wired as shown in figure 6.14.3. Prepare a circuit that switches
over the main circuit wires (U, V, and W) in synchronization with the SEL contacts. Use crimp terminals
with high connection reliability to wire the terminals. Check the following items on completion of wiring
work.
a. Check that the wires are connected correctly.
b. Check that no wires are left unconnected.
c. Check that no terminals or wires are short-circuited or resulting in ground faults.