P4-17 Thermal motor protection to UL508C

• 0: Disabled
• 1: Activated

The inverters come equipped with a thermal motor protection function according to NEC to protect the motor from overload. In an internal memory, the motor current is accumulated over time.

The inverter goes to fault state as soon as the thermal limit is exceeded (I.t-trP).

Once the output current of the inverter is less than the set rated motor current, the internal memory is decremented depending on the output current.

When P4-17 is disabled, the thermal overload memory is reset when switching power off and on again.

When P4-17 is enabled, the memory is maintained even after power off and on again.

For inverters that are operated with a line frequency of 50 Hz, the factory setting is 0 = disabled.

For inverters that are operated with a line frequency of 60 Hz, the factory setting is 1 = enabled.