Toshiba TOSVERT VF-AS3 Instruction Manual page 23

Wiring
• For power terminals, use ferrules with insulation sleeve terminal and crimp-style terminal with
insulation sleeve. Connect the terminals so that adjacent terminals do not touch each other.
• For the sizes of electric wires used in the power circuit, refer to the table in [4. 1].
• The length of each wire is assumed to be 30 m or less. If the wire length is over 30 m, the wire size
(diameter) must be increased.
• For grounding terminal, use wires of the size that is equivalent to or larger than those given in
table [4. 1] and always ground the inverter.
• Wire the grounding wire as close as possible to the inverter.
• To ground the inverter unit, connect it to an exclusive grounding terminal. Do not use screws of the
case, chassis, etc.
• Tighten the screws of the power terminal block and the control terminal block to the recommended
tightening torque shown in the table [2. 3. 3].
Control terminals
Refer to inverter instruction manual (E6582062)
2. 3. 2 Standard connection method
• Do not connect power supply to the output (motor side) terminals [U/T1], [V/T2] and [W/T3].
Connecting power supply to the output will damage the inverter and result in fire.
• Do not insert a braking resistor between DC terminals [PA/+] and [PC/-].
This will result in fire.
Please connect the braking resistor in accordance with the instruction manual.
• Do not touch wires of equipment (e.g. ELCB) that is connected to the inverter power side at
Prohibited
least 15 minutes after turning off the power.
If an electric charge remains in a capacitor in the inverter, touching the wires before the indi-
cated time will result in electric shock.
• The grounding wire must be connected securely.
If the grounding wire is not securely connected, when the inverter has failure or earth leakage,
this will result in electric shock or fire.
Be
grounded
The wiring of the power supply and motor is connected to the power terminal block and the wiring of
external control equipment such as control signals to the control terminal block.
WARNING
2-9
E6582162c



2. Installation and wiring