Overload Protection; Motor Thermal Protection; Compliance With Safety Standards - Toshiba TOSVERT VF-AS3 Instruction Manual

Applicable
Voltage
motor Inverter type
class
[kW]
3-phase
315 VFAS3-4280KPC
480 V
*1 The UL rated output current is different from the inverter unit rated output current.
*2 The UL rated output current is the one when the carrier frequency <F300> is equal to less than the value in the table.
*3 The wire size is the one when 75°C is continuously allowed (ambient temperature of 40°C or less).
• The input withstand rating is obtained with heat calculation. If the fuse is installed to a circuit with
larger input withstand rating, a reactor should be installed so that the input withstand rating should be
reduced below this level.
• Output interrupt rating varies depending on the type of integral solid state short circuit. Install the fuse
according to the NEC standard, local standard and type of installation.
• Use a fuse of Cooper Bussmann or Mersen.
• Be sure to use rod crimp-style terminals for the grounding terminals of the heat sink and metal plate
of the inverter.
9. 2. 4

Overload protection

The overload protection levels are below,
Frame size
HD rating: 150%-1minute, 185%-2s
ND rating: 120%-1minute, 150%-2s
For the rated current, refer to the name plate.
9. 2. 5

Motor thermal protection

To use the electronic thermal function of this inverter for motor thermal protection, set parameters
according to the motor specifications applied. For details, refer to [5. 1. 5].
When operating multiple motors with one inverter, install overload relay for each motor.
9. 2. 6 Motor PTC thermal protection
For details, refer to [6. 30. 19]
9. 2. 7 Compliance with UL Standard and CSA Standard
For details, refer to Appendix of this instruction manual.
9. 3

Compliance with safety standards

For details, refer to"VF-AS3 Safety function manual" (E6582068).
AIC (A)
UL Output
(Interrupting
current
capacity)
*1 *2
616.0
AIC 30000A
<F300>="2.5"
9-13
Power wire
Fuse class and
sizes
current (A)
*3
T 800Amax. 350 MCM × 3
9. Measures to satisfy standards
E6582062
Grounding
wire sizes
*3
AWG 3/0
3
9