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4. Short circuit ratings
200V class
•
Suitable for use in a circuit capable of delivering not more than 100kA rms symmetrical amperes, 264V maximum.
400V class
•
Suitable for use in a circuit capable of delivering not more than 100kA rms symmetrical amperes, 528V maximum.
5. Wiring
Refer to the National Electrical Code (Article 310) regarding the allowable current of the cable. Select the cable size for 125% of the
rated current according to the National Electrical Code (Article 430).
For wiring the input (R/L1, S/L2, T/L3) and output (U, V, W) terminals of the inverter, use the UL Listed copper, stranded wires (rated
at 75°C) and round crimp terminals. Crimp the terminals with the crimping tool recommended by the terminal maker.
6. Motor overload protection
When using the electronic thermal relay function as motor overload protection, set the rated motor current to Pr. 9 Electronic thermal O/
L relay. (
Refer to page 22
.)
NOTE
The internal accumulated heat value of the electronic thermal relay function is reset by inverter power reset and reset
signal input. Avoid unnecessary reset and power-OFF.
When multiple motors are operated by a single inverter, protection cannot be provided by the electronic thermal relay
function. Install an external thermal relay to each motor.
When the difference between the inverter and motor capacities is large and the setting is small, the protective
characteristics of the electronic thermal relay function will be deteriorated. In this case, use an external thermal relay.
A special motor cannot be protected by the electronic thermal relay function. Use the external thermal relay.
Motor over temperature sensing is not provided by the drive.
Appendix 3 SERIAL number check
The SERIAL number can be checked on the inverter rating plate or package. (Refer to page 1.)
Rating plate example
Symbol Year
Month
SERIAL
The SERIAL consists of one symbol, two characters indicating production year and month, and six characters indicating control number.
The last digit of the production year is indicated as the Year, and the Month is indicated by 1 to 9, X (October), Y (November), or Z
(December).
24
Control number
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