Toshiba TOSVERT VF-AS3 Instruction Manual page 22

2. 3. 1
Prohibited

Mandatory
action
Be
grounded
Prohibited
Mandatory
action
Pay attention to the following when wiring.
Measures for noise
To prevent electrical interference due to high-frequency noise generated by the inverter, separately
bundle wires to the power circuit's power side terminals ([R/L1], [S/L2], [T/L3]) and wires to the
motor side terminals ([U/T1], [V/T2], [W/T3]).
2. Installation and wiring
Cautions for wiring
• Never remove the front cover when the power is on.
The unit contains high voltage parts and contact with them will result in electric shock.
• Mount the front cover after wiring.
If you turn the power on without attaching the front cover, this will result in electric shock or
other injury.
• Electrical construction work must be done by a qualified expert.
Erroneous connection of power supply by someone who does not have that expert knowledge
will result in fire or electric shock.
• Connect output terminals (motor side) correctly.
If the phase sequence is incorrect, the motor will operate in reverse and that can result in injury.
• Wiring must be done after installation.
If you perform wiring prior to installation, this will result in electric shock or other injury.
• Verify that the power is turned off and the charge lamp is off before starting wiring.
If you perform wiring without verification, this will result in electric shock.
• Tighten the screws on the terminal block to specified torque.
If the screws are not tightened sufficiently to the specified torque, this will result in fire.
• Verify that the power supply voltage is within +10% and -15% (±10% when the load is 100% in
continuous operation) of the applied power supply voltage written on the name plate.
If you do not use the appropriate power supply voltage, this will result in failure or fire.
• 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.
• Do not attach devices with built-in capacitors (such as noise reduction filters or surge
absorbers) to the output terminals (motor side).
Heat rises up and this could cause a fire.
• Do not connect an capacitor with DC input terminal [PA/+], [PC/-] (including DC link with
another inverter) without installing proper pre-charge circuit.
Excessive capacitor between DC terminals will cause the input overcurrent of inverter and will
result in product damage or failure.
• Following type of screwdriver should be used;
Frame size A1 : PH2 (phillips, bit type2), shaft diameter 5.0mm or less
Frame size A2 : PH2 (phillips, bit type2), shaft diameter 5.8mm or less
WARNING
CAUTION
2-8
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