Motor Thermal Protection - Toshiba TOSVERT VF-AS1 Instruction Manual

■ Additional sheet
This additional sheet is additional descriptions of Section 9.2
"Measures to be taken to satisfy the UL/CSA standards".
The VF-AS1 models, that conform to the UL Standard and CSA Standard have the UL/CSA mark on the
nameplate.
1.Compliance with Installation
The VF-AS1 inverter must be installed in a panel, and used within the ambient temperature specification.
About the detail, refer to instruction manual section 1.4.4.
2.Compliance with Connection
Use the UL conformed cables (Rating 75 °C or more, Use the copper conductors only.) to the main circuit
terminals (R/L1, S/L2, T/L3, U/T1, V/T2, W/T3).
For instruction in the United States, Integral solid state short circuit protection does not provide branch circuit
protection. Branch circuit protection must be provided in accordance with the National Electrical Code and
any additional local codes.
For instruction in the Canada, Integral solid state short circuit protection does not provide branch circuit
protection. Branch circuit protection must be provided in accordance with the Canadian Electrical Code and
any additional local codes.
Refer to the table of instruction manual section 9.2 about wire sizes.
3.Compliance with Peripheral devices
Use the UL listed fuses at connecting to power supply.
Short circuit test is performed under the condition of the power supply short-circuit currents in below.
These interrupting capacities and fuse rating currents depend on the drive motor capacities.
Refer to the table of instruction manual section 9.2 about fuse.
Input voltage Drive motor
0.4kW
200V
0.75kW to 37kW
45kW and over
0.75kW to 1.5kW
2.2kW to 37kW
45kW to 132kW
400V 160kW to 220kW
280kW
355kW to 400kW
500kW

4.Motor thermal protection

Select the electronic thermal protection characteristics that fit with the ratings and characteristics of the
motor. In case of multi motor operation with one inverter, thermal relay should be connected to each motor.
Power supply short-circuit and maximum input voltage
Suitable For Use On A Circuit Capable Of Delivering Not More Than 5,000A rms
Symmetrical Amperes, 240 Volts Maximum When Protected by CC Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 5,000A rms
Symmetrical Amperes, 240 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 10,000A rms
Symmetrical Amperes, 240 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 5,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by CC Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 5,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 10,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 18,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 30,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by T Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 30,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by J Class Fuses.
Suitable For Use On A Circuit Capable Of Delivering Not More Than 42,000A rms
Symmetrical Amperes, 480 Volts Maximum When Protected by J Class Fuses.