Notes On The Application; Motors - Toshiba VF-PS1 Instruction Manual

Example of wiring of each model
«VFPS1-2550P~2900P, 4900PC~4160KPC»
1
«VFPS1-4400KPC»
PO.1
1.4

Notes on the application

1.4.1 Motors

Keep the following in mind when using the VF-PS1 to drive a motor.
Mandatory
Comparisons with commercial power operation
The VF-PS1 Inverter employs the sinusoidal PWM system to supply the motor. This is why compared to operation
with a commercial power there will be a slight increase in motor temperature, noise and vibration. The main supply
voltage and current will also be distorted due to harmonic distortion while increase the line current.
Adjusting the overload protection level
The VF-PS1 Inverter protects against overloads with its electronic thermal overload detection circuits. The electronic
thermal's reference current of the inverter must be adjusted in line with the rated current of the motor being used in
combination.
High-speed operation at and above 50Hz/60Hz (rated frequency)
Operating at frequencies greater than 50Hz/60Hz will increase noise and vibration. There is also a possibility that
such operation will exceed the motor's mechanical strength under these conditions and the bearing limits. You
should verify with the motor's manufacturer operating.
Earth wire
PO PA/+
PA/+ PO.2 Earth wire
Use an inverter that conforms to the specifications of power supply and three-phase induction motor
being used. If the inverter being used does not conform to those specifications, not only will the
three-phase induction motor not rotate correctly, but it may cause serious accidents through
overheating and fire.
«VFPS1-4220KPC~4315KPC»
PO
«VFPS1-4500KPC, 4630KPC»
PO.1
Caution
A-16
E6581386
PA/+
Earth wire
PA/+ PO.2 Earth wire