Electronic trip units are devices which guarantee a system of protection based on microprocessor electronics.
In comparison with thermomagnetic trip units, they allow a more precise setting both in terms of trip times as well as in terms of current thresholds in order to meet better the installation requirements.
equiped with electronic trip unit with LSI functions.
We can adjust:
Function L (Long time delay) setup current and time delay
Function S (Short time delay) setup current and time delay
Function I (Instantaneous) setup current without delay
Function R (Instantaneous) earthing-leakage protection

IR: Overload long delay setting current

Isd: Short-circuit short delay setting current

Ii: Short-circuit instantaneous setting current

tR: Overload long delay setting time

tsd: Short-circuit short delay setting time

Ip: Overload pre-alarm setting current