Conditions for UL Compliant Use
According to UL508C rules, direct measurement motor over temperature sensing is required. Therefore, connect the temperature sensor of the motor to connection CN11.
Use class CC or class J fuses according to UL 248-4.
Maximum fuse for Lexium 52 to be connected upstream at 30 A.
Use at least 60/75 °C (140/167 °F) copper conductors.
400/480 V three-phase devices may be operated at 480 Y / 277 Vac networks maximum.
Use only in overvoltage category III or where the maximum available Rated Impulse Withstand Voltage Peak is equal or less than 4000 Volts.", or equivalent.
Short-Circuit Current Rating (SCCR)
Only connect the Lexium 52 Standalone Drive System to a mains supply network not exceeding the SCCR (Short Circuit Current Rating) from table below, or take appropriate measures according to UL 508A SB4 in the supply (feeder) circuit of the control cabinet to limit the short circuit current to a value below the least SCCR of those devices you are using from the following table:
|
Lexium 52 Standalone Drive System |
Short-Circuit Current Rating(1) |
|---|---|
|
Lexium 52 |
22 kA |
|
(1) Using Class CC or J fuses. |
|
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.
Line reactors according to UL 508 A (SB 4.2.1 Exception No. 1) are not required to have a short-circuit current rating (SCCR).
