Connection; Basic Connection - IMO VXSM75-1 Instruction Manual

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Connection

Remove the control terminal block cover to
connect the control terminal block. Remove the
main circuit terminal block cover to connect the
main circuit terminal block. Correctly connect
cables taking care of the following precautions.

2-3-1 Basic Connection

(1) Be sure to connect the power cables to
main circuit power terminals L1/R, L2/S and
L3/T or L1/L,L2/N of the inverter. If the
power cables are connected to other
terminals, the inverter will be broken. As
well, check the source voltage for the
allowable voltage range specified on the
nameplate and so on.
(2) Connect the grounding terminal according
to national or local regulations to prevent
electric shock, fire or other accidents and to
reduce electric noise.
(3) Use reliable crimp terminals for connection
of cables to the terminals.
(4) After finishing wiring, check the following.
a. Check if the cables are connected
correctly.
b. Check if there is no failure of connection.
c. Check if terminals or cables are short
circuited or there is a ground fault.
(5) To change connection of an inverter having
been turned on
The smoothing capacitor in the direct
current part of the main circuit takes time to
be discharged after it is turned off. To avoid
danger, check the DC voltage (across main
circuit terminals P (+) and N (-)) for a safety
voltage (25 Vdc or lower) using a multi-
meter, after the charge lamp is unlit. Wait
until the residual voltage is discharged
before shorting a circuit, to avoid being hit
by sparks caused by electric discharge.
Installation and Connection
WARNING
• Be sure to connect the grounding
cable before applying power.
Otherwise electric shock or fire could
occur.
• Qualified electricians should carry out
wiring.
Otherwise electric shock could occur.
• Perform wiring after checking that the
power supply is turned off.
Otherwise electric shock could occur.
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